Fix core instrumentation tests

- Add managed device for testing
- Set device to "Pixel 3" with API level 34
- Use AOSP system image source

.github/CODEOWNERS

@@ -0,0 +1,8 @@
+# See https://docs.github.com/de/repositories/managing-your-repositorys-settings-and-features/customizing-your-repository/about-code-owners
+# For combination with "Require review from code owners" for main-ose branch.
+
+# Dependabot
+gradle/**   @bitfireAT/app-dev
+
+# everything else
+*   @rfc2822

.github/ISSUE_TEMPLATE/config.yml

@@ -1,4 +1,4 @@
-blank_issues_enabled: false
+blank_issues_enabled: true
 contact_links:
   - name: DAVx⁵ Community Support
     url: https://github.com/bitfireAT/davx5-ose/discussions

.github/ISSUE_TEMPLATE/qualified-bug.yml

@@ -1,5 +1,6 @@
 name: Qualified Bug Report
-description: "[Developers only] For qualified bug reports. (Use Discussions if unsure.)"
+description: "For qualified bug reports. (Use Discussions if unsure.)"
+type: bug
 labels: ["bug"]
 body:
   - type: checkboxes

.github/ISSUE_TEMPLATE/qualified-feature.yml

@@ -1,5 +1,6 @@
 name: Qualified Feature Request
-description: "[Developers only] For qualified feature requests. (Use Discussions if unsure.)"
+description: "For qualified feature requests. (Use Discussions if unsure.)"
+type: feature
 labels: ["enhancement"]
 body:
   - type: checkboxes

.github/dependabot.yml

@@ -0,0 +1,32 @@
+version: 2
+updates:
+  # Enable version updates for GitHub Actions
+  - package-ecosystem: "github-actions"
+    # Workflow files stored in the default location of `.github/workflows`
+    # You don't need to specify `/.github/workflows` for `directory`. You can use `directory: "/"`.
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    commit-message:
+      prefix: "[CI] "
+    labels:
+      - "github_actions"
+      - "dependencies"
+    groups:
+      ci-actions:
+        patterns: ["*"]
+        
+  - package-ecosystem: "gradle"
+    directory: "/"
+    schedule:
+      interval: "weekly"
+    labels:             # don't create "java" label (default for gradle ecosystem)
+      - "dependencies"
+    groups:
+      app-dependencies:
+        patterns: ["*"]
+    ignore:
+      # dependencies without semantic versioning
+      - dependency-name: "com.github.bitfireat:cert4android"
+      - dependency-name: "com.github.bitfireat:dav4jvm"
+      - dependency-name: "com.github.bitfireat:synctools"

.github/workflows/codeql.yml

@@ -8,6 +8,7 @@ on:
     branches: [ main-ose ]
   schedule:
     - cron: '22 10 * * 1'
+
 concurrency:
   group: codeql-${{ github.ref }}
   cancel-in-progress: true
@@ -21,38 +22,29 @@ jobs:
       contents: read
       security-events: write
 
-    strategy:
-      fail-fast: false
-      matrix:
-        language: [ 'java' ]
-
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
-    - uses: actions/setup-java@v4
+      uses: actions/checkout@v6
+    - uses: actions/setup-java@v5
       with:
         distribution: temurin
         java-version: 21
-    - uses: gradle/actions/setup-gradle@v3
+    - uses: gradle/actions/setup-gradle@v5
       with:
         cache-encryption-key: ${{ secrets.gradle_encryption_key }}
         cache-read-only: true         # gradle user home cache is generated by test jobs
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v3
+      uses: github/codeql-action/init@v4
       with:
-        languages: ${{ matrix.language }}
+        languages: java-kotlin
+        build-mode: manual            # autobuild uses older JDK
 
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, Go, or Java).
-    # If this step fails, then you should remove it and run the build manually (see below)
-    #- name: Autobuild
-    #  uses: github/codeql-action/autobuild@v2
-
-    - name: Build
-      run: ./gradlew --build-cache --configuration-cache --configuration-cache-problems=warn --no-daemon app:assembleOseDebug
+    - name: Build                     # we must not use build cache here
+      run: ./gradlew --no-daemon --configuration-cache app:assembleDebug
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v3
+      uses: github/codeql-action/analyze@v4
       with:
         category: "/language:${{matrix.language}}"

.github/workflows/dependency-submission.yml

@@ -0,0 +1,24 @@
+name: Dependency Submission
+
+on:
+  push:
+    branches: [ 'main-ose' ]
+
+permissions:
+  contents: write
+
+jobs:
+  dependency-submission:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v6
+    - uses: actions/setup-java@v5
+      with:
+        distribution: temurin
+        java-version: 21
+
+    - name: Generate and submit dependency graph
+      uses: gradle/actions/dependency-submission@v5
+      with:
+        cache-encryption-key: ${{ secrets.gradle_encryption_key }}
+        dependency-graph-exclude-configurations: '.*[Tt]est.* .*[cC]heck.*'

.github/workflows/dependent-issues.yml

@@ -1,55 +0,0 @@
-name: Dependent Issues
-
-on:
-  issues:
-    types:
-      - opened
-      - edited
-      - closed
-      - reopened
-  pull_request_target:
-    types:
-      - opened
-      - edited
-      - closed
-      - reopened
-      # Makes sure we always add status check for PRs. Useful only if
-      # this action is required to pass before merging. Otherwise, it
-      # can be removed.
-      - synchronize
-
-  # Schedule a daily check. Useful if you reference cross-repository
-  # issues or pull requests. Otherwise, it can be removed.
-  schedule:
-    - cron: '19 9 * * *'
-
-permissions: write-all
-
-jobs:
-  check:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: z0al/dependent-issues@v1
-        env:
-          # (Required) The token to use to make API calls to GitHub.
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-          # (Optional) The token to use to make API calls to GitHub for remote repos.
-          GITHUB_READ_TOKEN: ${{ secrets.DEPENDENT_ISSUES_READ_TOKEN }}
-
-        with:
-          # (Optional) The label to use to mark dependent issues
-          # label: dependent
-
-          # (Optional) Enable checking for dependencies in issues.
-          # Enable by setting the value to "on". Default "off"
-          check_issues: on
-
-          # (Optional) A comma-separated list of keywords. Default
-          # "depends on, blocked by"
-          keywords: depends on, blocked by
-
-          # (Optional) A custom comment body. It supports `{{ dependencies }}` token.
-          comment: >
-            This PR/issue depends on:
-
-            {{ dependencies }}

.github/workflows/release.yml

@@ -19,19 +19,19 @@ jobs:
       discussions: write
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-java@v4
+      - uses: actions/checkout@v6
+      - uses: actions/setup-java@v5
         with:
           distribution: temurin
           java-version: 21
-      - uses: gradle/actions/setup-gradle@v3
+      - uses: gradle/actions/setup-gradle@v5
 
       - name: Prepare keystore
         run: echo ${{ secrets.android_keystore_base64 }} | base64 -d >$GITHUB_WORKSPACE/keystore.jks
 
       - name: Build signed package
-        # Make sure that caches are disabled to generate reproducible release builds
-        run: ./gradlew --no-build-cache --no-configuration-cache --no-daemon app:assembleRelease
+        # Use build cache to speed up building of build variants, but clean caches from previous tests before
+        run: ./gradlew --build-cache --configuration-cache --no-daemon app:clean app:assembleRelease
         env:
           ANDROID_KEYSTORE: ${{ github.workspace }}/keystore.jks
           ANDROID_KEYSTORE_PASSWORD: ${{ secrets.android_keystore_password }}
@@ -45,4 +45,3 @@ jobs:
           files: app/build/outputs/apk/ose/release/*.apk
           fail_on_unmatched_files: true
           generate_release_notes: true
-          discussion_category_name: Announcements

.github/workflows/test-dev.yml

@@ -2,80 +2,135 @@ name: Development tests
 on:
   push:
     branches:
-      - '*'
+      - 'main-ose'
+  pull_request:
 
 concurrency:
   group: test-dev-${{ github.ref }}
   cancel-in-progress: true
 
+# We provide a remote gradle build cache. Take the settings from the secrets and enable
+# configuration and build cache for all gradle jobs.
+#
+# Note: The secrets are not available for forks and Dependabot PRs.
+env:
+  GRADLE_BUILDCACHE_URL: ${{ secrets.gradle_buildcache_url }}
+  GRADLE_BUILDCACHE_USERNAME: ${{ secrets.gradle_buildcache_username }}
+  GRADLE_BUILDCACHE_PASSWORD: ${{ secrets.gradle_buildcache_password }}
+  GRADLE_OPTS: -Dorg.gradle.caching=true -Dorg.gradle.configuration-cache=true
+
 jobs:
   compile:
-    name: Compile for build cache
-    if: ${{ github.ref == 'refs/heads/main-ose' }}
+    name: Compile
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-java@v4
+      - uses: actions/checkout@v6
+      - uses: actions/setup-java@v5
         with:
           distribution: temurin
           java-version: 21
 
       # See https://community.gradle.org/github-actions/docs/setup-gradle/ for more information
-      - uses: gradle/actions/setup-gradle@v3            # creates build cache when on main branch
+      - uses: gradle/actions/setup-gradle@v5
         with:
           cache-encryption-key: ${{ secrets.gradle_encryption_key }}
-          dependency-graph: generate-and-submit         # submit Github Dependency Graph info
+          cache-read-only: false                            # allow branches to update their configuration cache
+          gradle-home-cache-excludes: caches/build-cache-1  # don't cache local build cache because we use a remote cache
 
-      - run: ./gradlew --build-cache --configuration-cache --configuration-cache-problems=warn app:compileOseDebugSource
+      - name: Cache Android environment
+        uses: actions/cache@v5
+        with:
+          path: ~/.config/.android                          # needs to be cached so that configuration cache can work
+          key: android-${{ hashFiles('app/build.gradle.kts') }}
 
-  test:
+      - name: Compile
+        run: ./gradlew app:compileOseDebugSource
+
+      # Cache configurations for the other jobs (including assemble for CodeQL)
+      - name: Populate configuration cache
+        run: |
+          ./gradlew --dry-run core:assembleDebug app:assembleDebug
+          ./gradlew --dry-run core:lintDebug app:lintOseDebug
+          ./gradlew --dry-run core:testDebugUnitTest app:testOseDebugUnitTest
+          ./gradlew --dry-run core:virtualDebugAndroidTest app:virtualOseDebugAndroidTest
+
+  unit_tests:
     needs: compile
-    if: ${{ always() }}     # even if compile didn't run (because not on main branch)
     name: Lint and unit tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-java@v4
+      - uses: actions/checkout@v6
+      - uses: actions/setup-java@v5
         with:
           distribution: temurin
           java-version: 21
-      - uses: gradle/actions/setup-gradle@v3
+      - uses: gradle/actions/setup-gradle@v5
         with:
           cache-encryption-key: ${{ secrets.gradle_encryption_key }}
           cache-read-only: true
 
-      - name: Run lint
-        run: ./gradlew --build-cache --configuration-cache --configuration-cache-problems=warn app:lintOseDebug
-      - name: Run unit tests
-        run: ./gradlew --build-cache --configuration-cache --configuration-cache-problems=warn app:testOseDebugUnitTest
+      - name: Restore Android environment
+        uses: actions/cache/restore@v5
+        with:
+          path: ~/.config/.android
+          key: android-${{ hashFiles('app/build.gradle.kts') }}
 
-  test_on_emulator:
+      - name: Lint checks
+        run: ./gradlew core:lintDebug app:lintOseDebug
+
+      - name: Unit tests
+        run: ./gradlew core:testDebugUnitTest app:testOseDebugUnitTest
+
+  instrumented_tests:
     needs: compile
-    if: ${{ always() }}     # even if compile didn't run (because not on main branch)
     name: Instrumented tests
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-java@v4
+      - uses: actions/checkout@v6
+      - uses: actions/setup-java@v5
         with:
           distribution: temurin
           java-version: 21
-      - uses: gradle/actions/setup-gradle@v3
+      - uses: gradle/actions/setup-gradle@v5
         with:
           cache-encryption-key: ${{ secrets.gradle_encryption_key }}
           cache-read-only: true
 
+      - name: Restore Android environment
+        uses: actions/cache/restore@v5
+        with:
+          path: ~/.config/.android
+          key: android-${{ hashFiles('app/build.gradle.kts') }}
+
+      # gradle and Android SDK often take more space than what is available on the default runner.
+      # We try to free a few GB here to make gradle-managed devices more reliable.
+      - name: Free some disk space
+        uses: jlumbroso/free-disk-space@main
+        with:
+          android: false          # we need the Android SDK
+          large-packages: false   # apt takes too long
+          swap-storage: false     # gradle needs much memory
+
+      - name: Restore AVD
+        id: restore-avd
+        uses: actions/cache/restore@v5
+        with:
+          path: ~/.config/.android/avd                        # where AVD is stored
+          key: avd-${{ hashFiles('app/build.gradle.kts') }}   # gradle-managed devices are defined there
+
+      # Enable virtualization for Android emulator
       - name: Enable KVM group perms
         run: |
           echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' | sudo tee /etc/udev/rules.d/99-kvm4all.rules
           sudo udevadm control --reload-rules
           sudo udevadm trigger --name-match=kvm
 
-      - name: Cache AVD
-        uses: actions/cache@v4
-        with:
-          path: ~/.config/.android/avd
-          key: avd-${{ hashFiles('app/build.gradle.kts') }}   # gradle-managed devices are defined there
+      - name: Instrumented tests
+        run: ./gradlew core:virtualDebugAndroidTest app:virtualOseDebugAndroidTest
 
-      - name: Run device tests
-        run: ./gradlew --build-cache --configuration-cache --configuration-cache-problems=warn app:virtualCheck
+      - name: Cache AVD
+        uses: actions/cache/save@v5
+        if: steps.restore-avd.outputs.cache-hit != 'true'
+        with:
+          path: ~/.config/.android/avd                        # where AVD is stored
+          key: avd-${{ hashFiles('app/build.gradle.kts') }}   # gradle-managed devices are defined there

.gitignore

@@ -16,10 +16,6 @@
 bin/
 gen/
 
-# Gradle files
-.gradle/
-build/
-
 # Local configuration file (sdk path, etc)
 local.properties
 

.idea/codeStyles/Project.xml

@@ -0,0 +1,9 @@
+<component name="ProjectCodeStyleConfiguration">
+  <code_scheme name="Project" version="173">
+    <option name="LINE_SEPARATOR" value="&#10;" />
+    <option name="RIGHT_MARGIN" value="180" />
+    <codeStyleSettings language="kotlin">
+      <option name="CODE_STYLE_DEFAULTS" value="KOTLIN_OFFICIAL" />
+    </codeStyleSettings>
+  </code_scheme>
+</component>

.idea/codeStyles/codeStyleConfig.xml

@@ -0,0 +1,5 @@
+<component name="ProjectCodeStyleConfiguration">
+  <state>
+    <option name="USE_PER_PROJECT_SETTINGS" value="true" />
+  </state>
+</component>

.idea/copyright/LICENSE.xml

@@ -0,0 +1,6 @@
+<component name="CopyrightManager">
+  <copyright>
+    <option name="notice" value="Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details." />
+    <option name="myName" value="LICENSE" />
+  </copyright>
+</component>

.idea/copyright/profiles_settings.xml

@@ -0,0 +1,3 @@
+<component name="CopyrightManager">
+  <settings default="LICENSE" />
+</component>

.tx/config

@@ -1,30 +0,0 @@
-[main]
-host     = https://www.transifex.com
-lang_map = ar_SA: ar, en_GB: en-rGB, fa_IR: fa-rIR, fi_FI: fi, nb_NO: nb, sk_SK: sk, sl_SI: sl, tr_TR: tr, zh_CN: zh, zh_TW: zh-rTW
-
-[o:bitfireAT:p:davx5:r:app]
-file_filter   = app/src/main/res/values-<lang>/strings.xml
-source_file   = app/src/main/res/values/strings.xml
-source_lang   = en
-type          = ANDROID
-minimum_perc  = 20
-resource_name = App strings (all flavors)
-
-
-# Attention: fastlane directories are like "en-us", not "en-rUS"!
-
-[o:bitfireAT:p:davx5:r:metadata-short-description]
-file_filter   = fastlane/metadata/android/<lang>/short_description.txt
-source_file   = fastlane/metadata/android/en-US/short_description.txt
-source_lang   = en
-type          = TXT
-minimum_perc  = 100
-resource_name = Metadata: short description
-
-[o:bitfireAT:p:davx5:r:metadata-full-description]
-file_filter   = fastlane/metadata/android/<lang>/full_description.txt
-source_file   = fastlane/metadata/android/en-US/full_description.txt
-source_lang   = en
-type          = TXT
-minimum_perc  = 100
-resource_name = Metadata: full description

AUTHORS

@@ -1,11 +1,7 @@
-# This is the list of significant contributors to DAVx5.
-#
-# This does not necessarily list everyone who has contributed work.
-# To see the full list of contributors, see the revision history in
-# source control.
+You can view the list of people who have contributed to the code base in the version control history:
+https://github.com/bitfireAT/davx5-ose/graphs/contributors
 
-Ricki Hirner (bitfire.at)
-Bernhard Stockmann (bitfire.at)
+Translators are not mentioned in the history explicitly.
+The list of translators can be found in the About screen.
 
-Sunik Kupfer (bitfire.at)
-Patrick Lang (techbee.at)
+Every contribution is welcome. There are many other forms of contributing besides writing code!

CONTRIBUTING.md

@@ -14,24 +14,11 @@ If you send us a pull request, our CLA bot will ask you to sign the
 Contributor's License Agreement so that we can use your contribution.
 
 
-# Copyright
+# Copyright notice
 
 Make sure that every file that contains significant work (at least every code file)
-starts with the copyright header:
-
-```
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-```
-
-You can set this in Android Studio:
-
-1. Settings / Editor / Copyright / Copyright Profiles
-2. Paste the text above (without the stars).
-3. Set Formatting so that the preview exactly looks like above; one blank line after the block.
-4. Set this copyright profile as the default profile for the project.
-5. Apply copyright: right-click in file tree / Update copyright.
+starts with the copyright header. Android Studio should do so automatically because the
+configuration is stored in the repository (`.idea/copyright`).
 
 
 # Style guide
@@ -110,8 +97,3 @@ Test classes should be in the appropriate directory (see existing tests) and in
 tested class. Tests are usually be named like `methodToBeTested_Condition()`, see
 [Test apps on Android](https://developer.android.com/training/testing/).
 
-
-# Authors
-
-If you make significant contributions, feel free to add yourself to the [AUTHORS file](AUTHORS).
-

README.md

@@ -1,9 +1,9 @@
 
-[![Website](https://img.shields.io/website?style=flat-square&up_color=%237cb342&url=https%3A%2F%2Fwww.davx5.com)](https://www.davx5.com/)
-[![F-Droid](https://img.shields.io/f-droid/v/at.bitfire.davdroid?style=flat-square)](https://f-droid.org/packages/at.bitfire.davdroid/)
-[![License](https://img.shields.io/github/license/bitfireAT/davx5-ose?style=flat-square)](https://github.com/bitfireAT/davx5-ose/blob/main/LICENSE)
 [![Follow @davx5app@fosstodon.org](https://img.shields.io/mastodon/follow/109598783742737223?domain=https%3A%2F%2Ffosstodon.org&style=flat-square)](https://fosstodon.org/@davx5app)
-[![Development tests](https://github.com/bitfireAT/davx5-ose/actions/workflows/test-dev.yml/badge.svg)](https://github.com/bitfireAT/davx5-ose/actions/workflows/test-dev.yml)
+[![Website](https://img.shields.io/website?style=flat-square&up_color=%237cb342&url=https%3A%2F%2Fwww.davx5.com)](https://www.davx5.com/)
+[![License](https://img.shields.io/github/license/bitfireAT/davx5-ose?style=flat-square)](https://github.com/bitfireAT/davx5-ose/blob/main/LICENSE)
+[![F-Droid](https://img.shields.io/f-droid/v/at.bitfire.davdroid?style=flat-square)](https://f-droid.org/packages/at.bitfire.davdroid/)
+![GitHub Downloads (all assets, all releases)](https://img.shields.io/github/downloads/bitfireAT/davx5-ose/total?label=GitHub%20downloads)
 
 ![DAVx⁵ logo](app/src/main/res/mipmap-xxxhdpi/ic_launcher.png)
 
@@ -11,8 +11,10 @@
 DAVx⁵
 ========
 
-Please see the [DAVx⁵ Web site](https://www.davx5.com) for
-comprehensive information about DAVx⁵, including a list of services it has been tested with.
+> [!IMPORTANT]
+> Please see the [DAVx⁵ Web site](https://www.davx5.com) for
+> comprehensive information about DAVx⁵, including a list of services it has been tested with,
+> a manual and FAQ.
 
 DAVx⁵ is licensed under the [GPLv3 License](LICENSE).
 
@@ -26,8 +28,7 @@ Parts of DAVx⁵ have been outsourced into these libraries:
 
 * [cert4android](https://github.com/bitfireAT/cert4android) – custom certificate management
 * [dav4jvm](https://github.com/bitfireAT/dav4jvm) – WebDAV/CalDav/CardDAV framework
-* [ical4android](https://github.com/bitfireAT/ical4android) – iCalendar processing and Calendar Provider access
-* [vcard4android](https://github.com/bitfireAT/vcard4android) – vCard processing and Contacts Provider access
+* [synctools](https://github.com/bitfireAT/synctools) – iCalendar/vCard/Tasks processing and content provider access
 
 **If you want to support DAVx⁵, please consider [donating to DAVx⁵](https://www.davx5.com/donate)
 or [purchasing it](https://www.davx5.com/download).**

app-ose/build.gradle.kts

@@ -0,0 +1,126 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+plugins {
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.compose.compiler)
+    alias(libs.plugins.hilt)
+    alias(libs.plugins.ksp)
+}
+
+android {
+    compileSdk = 36
+
+    defaultConfig {
+        minSdk = 24        // Android 7.0
+        targetSdk = 36     // Android 16
+
+        applicationId = "at.bitfire.davdroid"
+
+        versionCode = 405090005
+        versionName = "4.5.9"
+
+        //base.archivesName = "davx5-$versionCode-$versionName"
+    }
+
+    java {
+        toolchain {
+            languageVersion = JavaLanguageVersion.of(21)
+        }
+    }
+
+    compileOptions {
+        isCoreLibraryDesugaringEnabled = true
+    }
+
+    buildFeatures {
+        compose = true
+    }
+
+    // Java namespace for our classes (not to be confused with Android package ID)
+    namespace = "com.davx5.ose"
+
+    flavorDimensions += "distribution"
+    productFlavors {
+        create("ose") {
+            dimension = "distribution"
+            versionNameSuffix = "-ose"
+        }
+    }
+
+    androidResources {
+        generateLocaleConfig = true
+    }
+
+    buildTypes {
+        getByName("release") {
+            isMinifyEnabled = true
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules-release.pro")
+
+            isShrinkResources = true
+
+            signingConfig = signingConfigs.findByName("bitfire")
+        }
+    }
+
+    signingConfigs {
+        create("bitfire") {
+            storeFile = file(System.getenv("ANDROID_KEYSTORE") ?: "/dev/null")
+            storePassword = System.getenv("ANDROID_KEYSTORE_PASSWORD")
+            keyAlias = System.getenv("ANDROID_KEY_ALIAS")
+            keyPassword = System.getenv("ANDROID_KEY_PASSWORD")
+        }
+    }
+
+    @Suppress("UnstableApiUsage")
+    testOptions {
+        managedDevices {
+            localDevices {
+                create("virtual") {
+                    device = "Pixel 3"
+                    // TBD: API level 35 and higher causes network tests to fail sometimes, see https://github.com/bitfireAT/davx5-ose/issues/1525
+                    // Suspected reason: https://developer.android.com/about/versions/15/behavior-changes-all#background-network-access
+                    apiLevel = 34
+                    systemImageSource = "aosp-atd"
+                }
+            }
+        }
+    }
+}
+
+dependencies {
+    // include core module
+    implementation(project(":core"))
+
+    // Kotlin / Android
+    implementation(libs.kotlin.stdlib)
+    implementation(libs.kotlinx.coroutines)
+    coreLibraryDesugaring(libs.android.desugaring)
+
+    // Hilt
+    implementation(libs.hilt.android.base)
+    ksp(libs.androidx.hilt.compiler)
+    ksp(libs.hilt.android.compiler)
+
+    // support libs
+    implementation(libs.androidx.core)
+    implementation(libs.androidx.hilt.work)
+    implementation(libs.androidx.lifecycle.viewmodel.base)
+    implementation(libs.androidx.lifecycle.viewmodel.compose)
+    implementation(libs.androidx.work.base)
+
+    // Jetpack Compose
+    implementation(platform(libs.androidx.compose.bom))
+    implementation(libs.androidx.compose.material3)
+    debugImplementation(libs.androidx.compose.ui.tooling)
+    implementation(libs.androidx.compose.ui.toolingPreview)
+
+    // own libraries
+    implementation(libs.bitfire.cert4android)
+
+    // third-party libs
+    implementation(libs.guava)
+    implementation(libs.okhttp.base)
+    implementation(libs.openid.appauth)
+}

app-ose/src/main/AndroidManifest.xml

@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+  -->
+
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+        android:installLocation="internalOnly">
+
+    <application android:name=".App"/>
+
+</manifest>

app-ose/src/main/kotlin/com/davx5/ose/App.kt

@@ -2,18 +2,19 @@
  * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
  */
 
-package at.bitfire.davdroid
+package com.davx5.ose
 
 import android.app.Application
 import androidx.hilt.work.HiltWorkerFactory
 import androidx.work.Configuration
+import at.bitfire.davdroid.di.scope.DefaultDispatcher
 import at.bitfire.davdroid.log.LogManager
 import at.bitfire.davdroid.startup.StartupPlugin
 import at.bitfire.davdroid.sync.account.AccountsCleanupWorker
 import at.bitfire.davdroid.ui.UiUtils
 import dagger.hilt.android.HiltAndroidApp
+import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.DelicateCoroutinesApi
-import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
 import java.util.logging.Logger
@@ -26,11 +27,15 @@ class App: Application(), Configuration.Provider {
     lateinit var logger: Logger
 
     /**
-     * Creates the [LogManager] singleton and thus initializes logging.
+     * Creates the [at.bitfire.davdroid.log.LogManager] singleton and thus initializes logging.
      */
     @Inject
     lateinit var logManager: LogManager
 
+    @Inject
+    @DefaultDispatcher
+    lateinit var defaultDispatcher: CoroutineDispatcher
+
     @Inject
     lateinit var plugins: Set<@JvmSuppressWildcards StartupPlugin>
 
@@ -60,9 +65,9 @@ class App: Application(), Configuration.Provider {
 
         // don't block UI for some background checks
         @OptIn(DelicateCoroutinesApi::class)
-        GlobalScope.launch(Dispatchers.Default) {
+        GlobalScope.launch(defaultDispatcher) {
             // clean up orphaned accounts in DB from time to time
-            AccountsCleanupWorker.enable(this@App)
+            AccountsCleanupWorker.Companion.enable(this@App)
 
             // create/update app shortcuts
             UiUtils.updateShortcuts(this@App)

app-ose/src/ose/AndroidManifest.xml

@@ -17,7 +17,7 @@
                 <category android:name="android.intent.category.BROWSABLE"/>
                 <data
                     tools:ignore="AppLinkUrlError"
-                    android:scheme="at.bitfire.davdroid"
+                        android:scheme="${applicationId}"
                     android:path="/oauth2/redirect"/>
             </intent-filter>
         </activity>

app-ose/src/ose/kotlin/com/davx5/ose/DebugInfoCrashHandler.kt

@@ -1,8 +1,8 @@
-/***************************************************************************************************
+/*
  * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- **************************************************************************************************/
+ */
 
-package at.bitfire.davdroid
+package com.davx5.ose
 
 import android.content.Context
 import at.bitfire.davdroid.ui.DebugInfoActivity

app-ose/src/ose/kotlin/com/davx5/ose/di/ColorSchemesModule.kt

@@ -0,0 +1,28 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package com.davx5.ose.di
+
+import androidx.compose.material3.ColorScheme
+import at.bitfire.davdroid.di.scope.DarkColorScheme
+import at.bitfire.davdroid.di.scope.LightColorScheme
+import at.bitfire.davdroid.ui.OseTheme
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.components.SingletonComponent
+
+@Module
+@InstallIn(SingletonComponent::class)
+class ColorSchemesModule {
+
+    @Provides
+    @LightColorScheme
+    fun lightColorScheme(): ColorScheme = OseTheme.lightScheme
+
+    @Provides
+    @DarkColorScheme
+    fun darkColorScheme(): ColorScheme = OseTheme.darkScheme
+
+}

app-ose/src/ose/kotlin/com/davx5/ose/di/CustomCertManagerModule.kt

@@ -0,0 +1,61 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package com.davx5.ose.di
+
+import android.content.Context
+import at.bitfire.cert4android.CustomCertManager
+import at.bitfire.cert4android.CustomCertStore
+import at.bitfire.cert4android.SettingsProvider
+import at.bitfire.davdroid.settings.Settings
+import at.bitfire.davdroid.settings.SettingsManager
+import at.bitfire.davdroid.ui.ForegroundTracker
+import dagger.Module
+import dagger.Provides
+import dagger.Reusable
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+import okhttp3.internal.tls.OkHostnameVerifier
+import java.util.Optional
+
+/**
+ * cert4android integration module
+ */
+@Module
+@InstallIn(SingletonComponent::class)
+class CustomCertManagerModule {
+
+    @Provides
+    fun customCertStore(@ApplicationContext context: Context): Optional<CustomCertStore> =
+        Optional.of(CustomCertStore.getInstance(context))
+
+    @Provides
+    @Reusable
+    fun customCertManager(
+        customCertStore: Optional<CustomCertStore>,
+        settings: SettingsManager
+    ): Optional<CustomCertManager> =
+        Optional.of(
+            CustomCertManager(
+            certStore = customCertStore.get(),
+            settings = object : SettingsProvider {
+
+                override val appInForeground: Boolean
+                    get() = ForegroundTracker.inForeground.value
+
+                override val trustSystemCerts: Boolean
+                    get() = !settings.getBoolean(Settings.DISTRUST_SYSTEM_CERTIFICATES)
+
+            }
+        ))
+
+    @Provides
+    @Reusable
+    fun customHostnameVerifier(
+        customCertManager: Optional<CustomCertManager>
+    ): Optional<CustomCertManager.HostnameVerifier> =
+        Optional.of(customCertManager.get().HostnameVerifier(OkHostnameVerifier))
+
+}

app-ose/src/ose/kotlin/com/davx5/ose/di/OseFlavorModule.kt

@@ -2,14 +2,15 @@
  * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
  */
 
-package at.bitfire.davdroid
+package com.davx5.ose.di
 
-import at.bitfire.davdroid.ui.AboutActivity
 import at.bitfire.davdroid.ui.AccountsDrawerHandler
-import at.bitfire.davdroid.ui.OpenSourceLicenseInfoProvider
 import at.bitfire.davdroid.ui.OseAccountsDrawerHandler
+import at.bitfire.davdroid.ui.about.AboutActivity
 import at.bitfire.davdroid.ui.intro.IntroPageFactory
 import at.bitfire.davdroid.ui.setup.LoginTypesProvider
+import com.davx5.ose.ui.about.OpenSourceLicenseInfoProvider
+import com.davx5.ose.ui.intro.OseIntroPageFactory
 import at.bitfire.davdroid.ui.setup.StandardLoginTypesProvider
 import dagger.Binds
 import dagger.Module
@@ -18,7 +19,7 @@ import dagger.hilt.android.components.ActivityComponent
 import dagger.hilt.android.components.ViewModelComponent
 import dagger.hilt.components.SingletonComponent
 
-interface OseFlavorModules {
+interface OseModules {
 
     @Module
     @InstallIn(ActivityComponent::class)

app-ose/src/ose/kotlin/com/davx5/ose/ui/about/OpenSourceLicenseInfoProvider.kt

@@ -2,9 +2,9 @@
  * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
  */
 
-package at.bitfire.davdroid.ui
+package com.davx5.ose.ui.about
 
-import android.app.Application
+import android.content.Context
 import android.text.Spanned
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
@@ -14,15 +14,18 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.text.AnnotatedString
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.core.text.HtmlCompat
-import androidx.lifecycle.AndroidViewModel
+import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
 import androidx.lifecycle.viewmodel.compose.viewModel
+import at.bitfire.davdroid.di.scope.IoDispatcher
 import at.bitfire.davdroid.ui.UiUtils.toAnnotatedString
+import at.bitfire.davdroid.ui.about.AboutActivity
 import com.google.common.io.CharStreams
 import dagger.hilt.android.lifecycle.HiltViewModel
-import javax.inject.Inject
-import kotlinx.coroutines.Dispatchers
+import dagger.hilt.android.qualifiers.ApplicationContext
+import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.launch
+import javax.inject.Inject
 
 class OpenSourceLicenseInfoProvider @Inject constructor(): AboutActivity.AppLicenseInfoProvider {
 
@@ -40,13 +43,16 @@ class OpenSourceLicenseInfoProvider @Inject constructor(): AboutActivity.AppLice
 
 
     @HiltViewModel
-    class Model @Inject constructor(app: Application): AndroidViewModel(app) {
+    class Model @Inject constructor(
+        @ApplicationContext private val context: Context,
+        @IoDispatcher private val ioDispatcher: CoroutineDispatcher
+    ): ViewModel() {
 
         var gpl by mutableStateOf<Spanned?>(null)
 
         init {
-            viewModelScope.launch(Dispatchers.IO) {
-                app.resources.assets.open("gplv3.html").use { inputStream ->
+            viewModelScope.launch(ioDispatcher) {
+                context.resources.assets.open("gplv3.html").use { inputStream ->
                     val raw = CharStreams.toString(inputStream.bufferedReader())
                     gpl = HtmlCompat.fromHtml(raw, HtmlCompat.FROM_HTML_MODE_LEGACY)
                 }

app-ose/src/ose/kotlin/com/davx5/ose/ui/intro/OseIntroPageFactory.kt

@@ -2,8 +2,9 @@
  * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
  */
 
-package at.bitfire.davdroid
+package com.davx5.ose.ui.intro
 
+import at.bitfire.davdroid.ui.intro.BackupsPage
 import at.bitfire.davdroid.ui.intro.BatteryOptimizationsPage
 import at.bitfire.davdroid.ui.intro.IntroPageFactory
 import at.bitfire.davdroid.ui.intro.OpenSourcePage
@@ -13,6 +14,7 @@ import at.bitfire.davdroid.ui.intro.WelcomePage
 import javax.inject.Inject
 
 class OseIntroPageFactory @Inject constructor(
+    backupsPage: BackupsPage,
     batteryOptimizationsPage: BatteryOptimizationsPage,
     openSourcePage: OpenSourcePage,
     permissionsIntroPage: PermissionsIntroPage,
@@ -24,6 +26,7 @@ class OseIntroPageFactory @Inject constructor(
         tasksIntroPage,
         permissionsIntroPage,
         batteryOptimizationsPage,
+        backupsPage,
         openSourcePage
     )
 

app/proguard-rules-release.pro

@@ -1,60 +0,0 @@
-
-# R8 usage for DAVx⁵:
-#    shrinking        yes (only in release builds)
-#    optimization     yes (on by R8 defaults)
-#      full-mode      no (see gradle.properties)
-#    obfuscation      no (open-source)
-
--dontobfuscate
--printusage build/reports/r8-usage.txt
-
-# ez-vcard: keep all vCard properties/parameters (used via reflection)
--keep class ezvcard.io.scribe.** { *; }
--keep class ezvcard.property.** { *; }
--keep class ezvcard.parameter.** { *; }
-
-# ical4j: keep all iCalendar properties/parameters (used via reflection)
--keep class net.fortuna.ical4j.** { *; }
-
-# XmlPullParser
--keep class org.xmlpull.** { *; }
-
-# DAVx⁵ + libs
--keep class at.bitfire.** { *; }       # all DAVx⁵ code is required
-
-# AGP 8.2 and 8.3 seem to remove this class, but ezvcard.io uses it. See https://github.com/bitfireAT/davx5/issues/499
--keep class javax.xml.namespace.QName { *; }
-
-# we use enum classes (https://www.guardsquare.com/en/products/proguard/manual/examples#enumerations)
--keepclassmembers,allowoptimization enum * {
-    public static **[] values();
-    public static ** valueOf(java.lang.String);
-}
-
-# Additional rules which are now required since missing classes can't be ignored in R8 anymore.
-# [https://developer.android.com/build/releases/past-releases/agp-7-0-0-release-notes#r8-missing-class-warning]
--dontwarn com.android.org.conscrypt.SSLParametersImpl
--dontwarn com.github.erosb.jsonsKema.**  # ical4j
--dontwarn com.google.errorprone.annotations.**
--dontwarn com.sun.jna.**                 # dnsjava
--dontwarn groovy.**
--dontwarn java.beans.Transient
--dontwarn javax.cache.**                 # ical4j
--dontwarn javax.naming.NamingException   # dnsjava
--dontwarn javax.naming.directory.**      # dnsjava
--dontwarn junit.textui.TestRunner
--dontwarn lombok.**                      # dnsjava
--dontwarn org.apache.harmony.xnet.provider.jsse.SSLParametersImpl
--dontwarn org.bouncycastle.jsse.**
--dontwarn org.codehaus.groovy.**
--dontwarn org.joda.**
--dontwarn org.jparsec.**                 # ical4j
--dontwarn org.json.*
--dontwarn org.jsoup.**
--dontwarn org.openjsse.javax.net.ssl.SSLParameters
--dontwarn org.openjsse.javax.net.ssl.SSLSocket
--dontwarn org.openjsse.net.ssl.OpenJSSE
--dontwarn org.xbill.DNS.spi.DnsjavaInetAddressResolverProvider      # dnsjava
--dontwarn org.xmlpull.**
--dontwarn sun.net.spi.nameservice.NameService
--dontwarn sun.net.spi.nameservice.NameServiceDescriptor

app/src/.gitignore

@@ -1 +0,0 @@
-espressoTest

app/src/androidTest/AndroidManifest.xml

@@ -1,27 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    android:installLocation="internalOnly">
-
-    <!-- account management permissions not required for own accounts since API level 22 -->
-    <uses-permission android:name="android.permission.AUTHENTICATE_ACCOUNTS" android:maxSdkVersion="22"/>
-    <uses-permission android:name="android.permission.GET_ACCOUNTS" android:maxSdkVersion="22"/>
-    <uses-permission android:name="android.permission.MANAGE_ACCOUNTS" android:maxSdkVersion="22"/>
-
-    <application>
-
-        <!-- test account type (without associated sync adapters) -->
-        <service
-            android:name="at.bitfire.davdroid.sync.account.TestAccountAuthenticator"
-            android:exported="false">
-            <intent-filter>
-                <action android:name="android.accounts.AccountAuthenticator"/>
-            </intent-filter>
-
-            <meta-data
-                android:name="android.accounts.AccountAuthenticator"
-                android:resource="@xml/test_account_authenticator"/>
-        </service>
-
-    </application>
-
-</manifest>

app/src/androidTest/kotlin/at/bitfire/davdroid/Dav4jvm.kt

@@ -1,20 +0,0 @@
-/***************************************************************************************************
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- **************************************************************************************************/
-
-package at.bitfire.davdroid
-
-import android.util.Xml
-import at.bitfire.dav4jvm.XmlUtils
-import org.junit.Assert.assertTrue
-import org.junit.Test
-
-class Dav4jvm {
-
-    @Test
-    fun test_Dav4jvm_XmlUtils_NewPullParser_RelaxedParsing() {
-        val parser = XmlUtils.newPullParser()
-        assertTrue(parser.getFeature(Xml.FEATURE_RELAXED))
-    }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/HiltTestRunner.kt

@@ -1,17 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid
-
-import android.app.Application
-import android.content.Context
-import androidx.test.runner.AndroidJUnitRunner
-import dagger.hilt.android.testing.HiltTestApplication
-
-class HiltTestRunner : AndroidJUnitRunner() {
-
-    override fun newApplication(cl: ClassLoader, name: String, context: Context): Application =
-        super.newApplication(cl, HiltTestApplication::class.java.name, context)
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/InitCalendarProviderRule.kt

@@ -1,123 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid
-
-import android.Manifest
-import android.accounts.Account
-import android.content.ContentProviderClient
-import android.content.ContentUris
-import android.content.ContentValues
-import android.os.Build
-import android.provider.CalendarContract
-import androidx.test.platform.app.InstrumentationRegistry
-import androidx.test.rule.GrantPermissionRule
-import at.bitfire.davdroid.resource.LocalCalendar
-import at.bitfire.davdroid.resource.LocalEvent
-import at.bitfire.ical4android.AndroidCalendar
-import at.bitfire.ical4android.Event
-import net.fortuna.ical4j.model.property.DtStart
-import net.fortuna.ical4j.model.property.RRule
-import org.junit.Assert.assertNotNull
-import org.junit.rules.ExternalResource
-import org.junit.rules.RuleChain
-import java.util.logging.Logger
-
-/**
- * JUnit ClassRule which initializes the AOSP CalendarProvider.
- *
- * It seems that the calendar provider unfortunately forgets the very first requests when it is used the very first time,
- * maybe by some wrongly synchronized database initialization. So things like querying the instances
- * fails in this case.
- *
- * So this rule is needed to allow tests which need the calendar provider to succeed even when the calendar provider
- * is used the very first time (especially in CI tests / a fresh emulator).
- *
- * See [at.bitfire.davdroid.resource.LocalCalendarTest] for an example of how to use this rule.
- */
-class InitCalendarProviderRule private constructor(): ExternalResource() {
-
-    companion object {
-
-        private var isInitialized = false
-        private val logger = Logger.getLogger(InitCalendarProviderRule::javaClass.name)
-
-        fun getInstance(): RuleChain = RuleChain
-            .outerRule(GrantPermissionRule.grant(Manifest.permission.READ_CALENDAR, Manifest.permission.WRITE_CALENDAR))
-            .around(InitCalendarProviderRule())
-
-    }
-
-    override fun before() {
-        if (!isInitialized) {
-            logger.info("Initializing calendar provider")
-            if (Build.VERSION.SDK_INT < 31)
-                logger.warning("Calendar provider initialization may or may not work. See InitCalendarProviderRule")
-
-            val context = InstrumentationRegistry.getInstrumentation().targetContext
-            val client = context.contentResolver.acquireContentProviderClient(CalendarContract.AUTHORITY)
-            assertNotNull("Couldn't acquire calendar provider", client)
-
-            client!!.use {
-                initCalendarProvider(client)
-                isInitialized = true
-            }
-        }
-    }
-
-    private fun initCalendarProvider(provider: ContentProviderClient) {
-        val account = Account("LocalCalendarTest", CalendarContract.ACCOUNT_TYPE_LOCAL)
-
-        // Sometimes, the calendar provider returns an ID for the created calendar, but then fails to find it.
-        var calendarOrNull: LocalCalendar? = null
-        for (i in 0..50) {
-            calendarOrNull = createAndVerifyCalendar(account, provider)
-            if (calendarOrNull != null)
-                break
-            else
-                Thread.sleep(100)
-        }
-        val calendar = calendarOrNull ?: throw IllegalStateException("Couldn't create calendar")
-
-        try {
-            // single event init
-            val normalEvent = Event().apply {
-                dtStart = DtStart("20220120T010203Z")
-                summary = "Event with 1 instance"
-            }
-            val normalLocalEvent = LocalEvent(calendar, normalEvent, null, null, null, 0)
-            normalLocalEvent.add()
-            LocalEvent.numInstances(provider, account, normalLocalEvent.id!!)
-
-            // recurring event init
-            val recurringEvent = Event().apply {
-                dtStart = DtStart("20220120T010203Z")
-                summary = "Event over 22 years"
-                rRules.add(RRule("FREQ=YEARLY;UNTIL=20740119T010203Z"))     // year needs to be  >2074 (not supported by Android <11 Calendar Storage)
-            }
-            val localRecurringEvent = LocalEvent(calendar, recurringEvent, null, null, null, 0)
-            localRecurringEvent.add()
-            LocalEvent.numInstances(provider, account, localRecurringEvent.id!!)
-        } finally {
-            calendar.delete()
-        }
-    }
-
-    private fun createAndVerifyCalendar(account: Account, provider: ContentProviderClient): LocalCalendar? {
-        val uri = AndroidCalendar.create(account, provider, ContentValues())
-
-        return try {
-            AndroidCalendar.findByID(
-                account,
-                provider,
-                LocalCalendar.Factory,
-                ContentUris.parseId(uri)
-            )
-        } catch (e: Exception) {
-            logger.warning("Couldn't find calendar after creation: $e")
-            null
-        }
-    }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/OkhttpClientTest.kt

@@ -1,48 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid
-
-import android.content.Context
-import at.bitfire.davdroid.network.HttpClient
-import at.bitfire.davdroid.settings.SettingsManager
-import dagger.hilt.android.qualifiers.ApplicationContext
-import dagger.hilt.android.testing.HiltAndroidRule
-import dagger.hilt.android.testing.HiltAndroidTest
-import okhttp3.Request
-import org.junit.Before
-import org.junit.Rule
-import org.junit.Test
-import javax.inject.Inject
-
-@HiltAndroidTest
-class OkhttpClientTest {
-
-    @get:Rule
-    val hiltRule = HiltAndroidRule(this)
-
-    @Inject
-    @ApplicationContext
-    lateinit var context: Context
-
-    @Inject
-    lateinit var settingsManager: SettingsManager
-
-    @Before
-    fun inject() {
-        hiltRule.inject()
-    }
-
-
-    @Test
-    fun testIcloudWithSettings() {
-        val client = HttpClient.Builder(context).build()
-        client.okHttpClient.newCall(Request.Builder()
-                .get()
-                .url("https://icloud.com")
-                .build())
-                .execute()
-    }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/TestModules.kt

@@ -1,38 +0,0 @@
-package at.bitfire.davdroid
-
-import at.bitfire.davdroid.push.PushRegistrationWorker
-import at.bitfire.davdroid.repository.DavCollectionRepository
-import at.bitfire.davdroid.startup.StartupPlugin
-import at.bitfire.davdroid.startup.TasksAppWatcher
-import dagger.Module
-import dagger.hilt.components.SingletonComponent
-import dagger.hilt.testing.TestInstallIn
-import dagger.multibindings.Multibinds
-
-interface TestModules {
-
-    // remove PushRegistrationWorkerModule from Android tests
-    @Module
-    @TestInstallIn(
-        components = [SingletonComponent::class],
-        replaces = [PushRegistrationWorker.PushRegistrationWorkerModule::class]
-    )
-    abstract class TestPushRegistrationWorkerModule {
-        // provides empty set of listeners
-        @Multibinds
-        abstract fun empty(): Set<DavCollectionRepository.OnChangeListener>
-    }
-
-    // remove TasksAppWatcherModule from Android tests
-    @Module
-    @TestInstallIn(
-        components = [SingletonComponent::class],
-        replaces = [TasksAppWatcher.TasksAppWatcherModule::class]
-    )
-    abstract class TestTasksAppWatcherModuleModule {
-        // provides empty set of plugins
-        @Multibinds
-        abstract fun empty(): Set<StartupPlugin>
-    }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/db/AppDatabaseTest.kt

@@ -1,50 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.db
-
-import android.content.Context
-import androidx.room.Room
-import androidx.room.testing.MigrationTestHelper
-import androidx.sqlite.db.framework.FrameworkSQLiteOpenHelperFactory
-import androidx.test.platform.app.InstrumentationRegistry
-import org.junit.Rule
-import org.junit.Test
-
-class AppDatabaseTest {
-
-    val TEST_DB = "test"
-
-    val context: Context = InstrumentationRegistry.getInstrumentation().targetContext
-
-    @Rule
-    @JvmField
-    val helper = MigrationTestHelper(
-        InstrumentationRegistry.getInstrumentation(),
-        AppDatabase::class.java,
-        listOf(), // no auto migrations until v8
-        FrameworkSQLiteOpenHelperFactory()
-    )
-
-
-    @Test
-    fun testAllMigrations() {
-        // DB schema is available since version 8, so create DB with v8
-        helper.createDatabase(TEST_DB, 8).close()
-
-        val db = Room.databaseBuilder(context, AppDatabase::class.java, TEST_DB)
-            // manual migrations
-            .addMigrations(*AppDatabase.migrations)
-            // auto-migrations that need to be specified explicitly
-            .addAutoMigrationSpec(AppDatabase.AutoMigration11_12(context))
-            .build()
-        try {
-            // open (with version 8) + migrate (to current version) database
-            db.openHelper.writableDatabase
-        } finally {
-            db.close()
-        }
-    }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/db/CollectionTest.kt

@@ -1,156 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.db
-
-import android.content.Context
-import android.security.NetworkSecurityPolicy
-import androidx.test.filters.SmallTest
-import at.bitfire.dav4jvm.DavResource
-import at.bitfire.dav4jvm.property.webdav.ResourceType
-import at.bitfire.davdroid.network.HttpClient
-import at.bitfire.davdroid.settings.SettingsManager
-import dagger.hilt.android.qualifiers.ApplicationContext
-import dagger.hilt.android.testing.HiltAndroidRule
-import dagger.hilt.android.testing.HiltAndroidTest
-import okhttp3.HttpUrl.Companion.toHttpUrl
-import okhttp3.mockwebserver.MockResponse
-import okhttp3.mockwebserver.MockWebServer
-import org.junit.After
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertFalse
-import org.junit.Assert.assertNull
-import org.junit.Assert.assertTrue
-import org.junit.Assume
-import org.junit.Before
-import org.junit.Rule
-import org.junit.Test
-import javax.inject.Inject
-
-@HiltAndroidTest
-class CollectionTest {
-
-    @get:Rule
-    val hiltRule = HiltAndroidRule(this)
-
-    @Inject
-    @ApplicationContext
-    lateinit var context: Context
-
-    @Inject
-    lateinit var settingsManager: SettingsManager
-
-    private lateinit var httpClient: HttpClient
-    private val server = MockWebServer()
-
-    @Before
-    fun setup() {
-        hiltRule.inject()
-
-        httpClient = HttpClient.Builder(context).build()
-        Assume.assumeTrue(NetworkSecurityPolicy.getInstance().isCleartextTrafficPermitted)
-    }
-
-    @After
-    fun teardown() {
-        httpClient.close()
-    }
-
-
-    @Test
-    @SmallTest
-    fun testFromDavResponseAddressBook() {
-        // r/w address book
-        server.enqueue(MockResponse()
-                .setResponseCode(207)
-                .setBody("<multistatus xmlns='DAV:' xmlns:CARD='urn:ietf:params:xml:ns:carddav'>" +
-                        "<response>" +
-                        "   <href>/</href>" +
-                        "   <propstat><prop>" +
-                        "       <resourcetype><collection/><CARD:addressbook/></resourcetype>" +
-                        "       <displayname>My Contacts</displayname>" +
-                        "       <CARD:addressbook-description>My Contacts Description</CARD:addressbook-description>" +
-                        "   </prop></propstat>" +
-                        "</response>" +
-                        "</multistatus>"))
-
-        lateinit var info: Collection
-        DavResource(httpClient.okHttpClient, server.url("/"))
-                .propfind(0, ResourceType.NAME) { response, _ ->
-            info = Collection.fromDavResponse(response) ?: throw IllegalArgumentException()
-        }
-        assertEquals(Collection.TYPE_ADDRESSBOOK, info.type)
-        assertTrue(info.privWriteContent)
-        assertTrue(info.privUnbind)
-        assertNull(info.supportsVEVENT)
-        assertNull(info.supportsVTODO)
-        assertNull(info.supportsVJOURNAL)
-        assertEquals("My Contacts", info.displayName)
-        assertEquals("My Contacts Description", info.description)
-    }
-
-    @Test
-    @SmallTest
-    fun testFromDavResponseCalendar() {
-        // read-only calendar, no display name
-        server.enqueue(MockResponse()
-                .setResponseCode(207)
-                .setBody("<multistatus xmlns='DAV:' xmlns:CAL='urn:ietf:params:xml:ns:caldav' xmlns:ICAL='http://apple.com/ns/ical/'>" +
-                        "<response>" +
-                        "   <href>/</href>" +
-                        "   <propstat><prop>" +
-                        "       <resourcetype><collection/><CAL:calendar/></resourcetype>" +
-                        "       <current-user-privilege-set><privilege><read/></privilege></current-user-privilege-set>" +
-                        "       <CAL:calendar-description>My Calendar</CAL:calendar-description>" +
-                        "       <CAL:calendar-timezone>tzdata</CAL:calendar-timezone>" +
-                        "       <ICAL:calendar-color>#ff0000</ICAL:calendar-color>" +
-                        "   </prop></propstat>" +
-                        "</response>" +
-                        "</multistatus>"))
-
-        lateinit var info: Collection
-        DavResource(httpClient.okHttpClient, server.url("/"))
-                .propfind(0, ResourceType.NAME) { response, _ ->
-                    info = Collection.fromDavResponse(response) ?: throw IllegalArgumentException()
-                }
-        assertEquals(Collection.TYPE_CALENDAR, info.type)
-        assertFalse(info.privWriteContent)
-        assertFalse(info.privUnbind)
-        assertNull(info.displayName)
-        assertEquals("My Calendar", info.description)
-        assertEquals(0xFFFF0000.toInt(), info.color)
-        assertEquals("tzdata", info.timezone)
-        assertTrue(info.supportsVEVENT!!)
-        assertTrue(info.supportsVTODO!!)
-        assertTrue(info.supportsVJOURNAL!!)
-    }
-
-    @Test
-    @SmallTest
-    fun testFromDavResponseWebcal() {
-        // Webcal subscription
-        server.enqueue(MockResponse()
-                .setResponseCode(207)
-                .setBody("<multistatus xmlns='DAV:' xmlns:CS='http://calendarserver.org/ns/'>" +
-                        "<response>" +
-                        "   <href>/webcal1</href>" +
-                        "   <propstat><prop>" +
-                        "       <displayname>Sample Subscription</displayname>" +
-                        "       <resourcetype><collection/><CS:subscribed/></resourcetype>" +
-                        "       <CS:source><href>webcals://example.com/1.ics</href></CS:source>" +
-                        "   </prop></propstat>" +
-                        "</response>" +
-                        "</multistatus>"))
-
-        lateinit var info: Collection
-        DavResource(httpClient.okHttpClient, server.url("/"))
-                .propfind(0, ResourceType.NAME) { response, _ ->
-                    info = Collection.fromDavResponse(response) ?: throw IllegalArgumentException()
-                }
-        assertEquals(Collection.TYPE_WEBCAL, info.type)
-        assertEquals("Sample Subscription", info.displayName)
-        assertEquals("https://example.com/1.ics".toHttpUrl(), info.source)
-    }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/repository/DavCollectionRepositoryTest.kt

@@ -1,88 +0,0 @@
-package at.bitfire.davdroid.repository
-
-import android.content.Context
-import at.bitfire.davdroid.db.AppDatabase
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.Service
-import at.bitfire.davdroid.settings.AccountSettings
-import dagger.hilt.android.qualifiers.ApplicationContext
-import dagger.hilt.android.testing.HiltAndroidRule
-import dagger.hilt.android.testing.HiltAndroidTest
-import io.mockk.mockk
-import io.mockk.verify
-import kotlinx.coroutines.runBlocking
-import okhttp3.HttpUrl.Companion.toHttpUrl
-import org.junit.After
-import org.junit.Before
-import org.junit.Rule
-import org.junit.Test
-import javax.inject.Inject
-
-@HiltAndroidTest
-class DavCollectionRepositoryTest {
-
-    @get:Rule
-    var hiltRule = HiltAndroidRule(this)
-
-    @Inject
-    lateinit var accountSettingsFactory: AccountSettings.Factory
-
-    @Inject
-    @ApplicationContext
-    lateinit var context: Context
-
-    @Inject
-    lateinit var db: AppDatabase
-
-    @Inject
-    lateinit var serviceRepository: DavServiceRepository
-
-    var service: Service? = null
-
-    @Before
-    fun setUp() {
-        hiltRule.inject()
-        service = createTestService(Service.TYPE_CARDDAV)!!
-    }
-
-    @After
-    fun cleanUp() {
-        db.close()
-        serviceRepository.deleteAll()
-    }
-
-
-    @Test
-    fun testOnChangeListener_setForceReadOnly() = runBlocking {
-        val collectionId = db.collectionDao().insertOrUpdateByUrl(
-            Collection(
-                serviceId = service!!.id,
-                type = Collection.TYPE_ADDRESSBOOK,
-                url = "https://example.com".toHttpUrl(),
-                forceReadOnly = false,
-            )
-        )
-        val testObserver = mockk<DavCollectionRepository.OnChangeListener>(relaxed = true)
-        val collectionRepository = DavCollectionRepository(accountSettingsFactory, context, db, mutableSetOf(testObserver), serviceRepository)
-
-        assert(db.collectionDao().get(collectionId)?.forceReadOnly == false)
-        verify(exactly = 0) {
-            testObserver.onCollectionsChanged()
-        }
-        collectionRepository.setForceReadOnly(collectionId, true)
-        assert(db.collectionDao().get(collectionId)?.forceReadOnly == true)
-        verify(exactly = 1) {
-            testObserver.onCollectionsChanged()
-        }
-    }
-
-
-    // Test helpers and dependencies
-
-    private fun createTestService(serviceType: String) : Service? {
-        val service = Service(id=0, accountName="test", type=serviceType, principal = null)
-        val serviceId = serviceRepository.insertOrReplace(service)
-        return serviceRepository.get(serviceId)
-    }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/repository/DavHomeSetRepositoryTest.kt

@@ -1,78 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.repository
-
-import at.bitfire.davdroid.db.HomeSet
-import at.bitfire.davdroid.db.Service
-import dagger.hilt.android.testing.HiltAndroidRule
-import dagger.hilt.android.testing.HiltAndroidTest
-import okhttp3.HttpUrl.Companion.toHttpUrl
-import org.junit.Assert.assertEquals
-import org.junit.Before
-import org.junit.Rule
-import org.junit.Test
-import javax.inject.Inject
-
-@HiltAndroidTest
-class DavHomeSetRepositoryTest {
-
-    @get:Rule
-    var hiltRule = HiltAndroidRule(this)
-
-    @Inject
-    lateinit var repository: DavHomeSetRepository
-
-    @Inject
-    lateinit var serviceRepository: DavServiceRepository
-
-    @Before
-    fun setUp() {
-        hiltRule.inject()
-    }
-
-
-    @Test
-    fun testInsertOrUpdate() {
-        // should insert new row or update (upsert) existing row - without changing its key!
-        val serviceId = createTestService()
-
-        val entry1 = HomeSet(id=0, serviceId=serviceId, personal=true, url="https://example.com/1".toHttpUrl())
-        val insertId1 = repository.insertOrUpdateByUrl(entry1)
-        assertEquals(1L, insertId1)
-        assertEquals(entry1.apply { id = 1L }, repository.getById(1L))
-
-        val updatedEntry1 = HomeSet(id=0, serviceId=serviceId, personal=true, url="https://example.com/1".toHttpUrl(), displayName="Updated Entry")
-        val updateId1 = repository.insertOrUpdateByUrl(updatedEntry1)
-        assertEquals(1L, updateId1)
-        assertEquals(updatedEntry1.apply { id = 1L }, repository.getById(1L))
-
-        val entry2 = HomeSet(id=0, serviceId=serviceId, personal=true, url= "https://example.com/2".toHttpUrl())
-        val insertId2 = repository.insertOrUpdateByUrl(entry2)
-        assertEquals(2L, insertId2)
-        assertEquals(entry2.apply { id = 2L }, repository.getById(2L))
-    }
-
-    @Test
-    fun testDelete() {
-        // should delete row with given primary key (id)
-        val serviceId = createTestService()
-
-        val entry1 = HomeSet(id=1, serviceId=serviceId, personal=true, url= "https://example.com/1".toHttpUrl())
-
-        val insertId1 = repository.insertOrUpdateByUrl(entry1)
-        assertEquals(1L, insertId1)
-        assertEquals(entry1, repository.getById(1L))
-
-        repository.delete(entry1)
-        assertEquals(null, repository.getById(1L))
-    }
-
-
-    private fun createTestService() : Long {
-        val service = Service(id=0, accountName="test", type= Service.TYPE_CALDAV, principal = null)
-        return serviceRepository.insertOrReplace(service)
-    }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/resource/LocalCalendarTest.kt

@@ -1,151 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.resource
-
-import android.accounts.Account
-import android.content.ContentProviderClient
-import android.content.ContentUris
-import android.content.ContentValues
-import android.provider.CalendarContract
-import android.provider.CalendarContract.ACCOUNT_TYPE_LOCAL
-import android.provider.CalendarContract.Events
-import androidx.test.platform.app.InstrumentationRegistry
-import at.bitfire.davdroid.InitCalendarProviderRule
-import at.bitfire.ical4android.AndroidCalendar
-import at.bitfire.ical4android.Event
-import at.bitfire.ical4android.util.MiscUtils.asSyncAdapter
-import at.bitfire.ical4android.util.MiscUtils.closeCompat
-import net.fortuna.ical4j.model.property.DtStart
-import net.fortuna.ical4j.model.property.RRule
-import net.fortuna.ical4j.model.property.RecurrenceId
-import net.fortuna.ical4j.model.property.Status
-import org.junit.After
-import org.junit.AfterClass
-import org.junit.Assert.assertEquals
-import org.junit.Before
-import org.junit.BeforeClass
-import org.junit.ClassRule
-import org.junit.Test
-import org.junit.rules.TestRule
-
-class LocalCalendarTest {
-
-    companion object {
-
-        @JvmField
-        @ClassRule
-        val initCalendarProviderRule: TestRule = InitCalendarProviderRule.getInstance()
-
-        private lateinit var provider: ContentProviderClient
-
-        @BeforeClass
-        @JvmStatic
-        fun setUpClass() {
-            val context = InstrumentationRegistry.getInstrumentation().targetContext
-            provider = context.contentResolver.acquireContentProviderClient(CalendarContract.AUTHORITY)!!
-        }
-
-        @AfterClass
-        @JvmStatic
-        fun tearDownClass() {
-            provider.closeCompat()
-        }
-
-    }
-
-    private val account = Account("LocalCalendarTest", ACCOUNT_TYPE_LOCAL)
-    private lateinit var calendar: LocalCalendar
-
-    @Before
-    fun setUp() {
-        val uri = AndroidCalendar.create(account, provider, ContentValues())
-        calendar = AndroidCalendar.findByID(account, provider, LocalCalendar.Factory, ContentUris.parseId(uri))
-    }
-
-    @After
-    fun tearDown() {
-        calendar.deleteCollection()
-    }
-
-
-    @Test
-    fun testDeleteDirtyEventsWithoutInstances_NoInstances_CancelledExceptions() {
-        // create recurring event with only deleted/cancelled instances
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with 3 instances"
-            rRules.add(RRule("FREQ=DAILY;COUNT=3"))
-            exceptions.add(Event().apply {
-                recurrenceId = RecurrenceId("20220120T010203Z")
-                dtStart = DtStart("20220120T010203Z")
-                summary = "Cancelled exception on 1st day"
-                status = Status.VEVENT_CANCELLED
-            })
-            exceptions.add(Event().apply {
-                recurrenceId = RecurrenceId("20220121T010203Z")
-                dtStart = DtStart("20220121T010203Z")
-                summary = "Cancelled exception on 2nd day"
-                status = Status.VEVENT_CANCELLED
-            })
-            exceptions.add(Event().apply {
-                recurrenceId = RecurrenceId("20220122T010203Z")
-                dtStart = DtStart("20220122T010203Z")
-                summary = "Cancelled exception on 3rd day"
-                status = Status.VEVENT_CANCELLED
-            })
-        }
-        val localEvent = LocalEvent(calendar, event, "filename.ics", null, null, LocalResource.FLAG_REMOTELY_PRESENT)
-        localEvent.add()
-        val eventId = localEvent.id!!
-
-        // set event as dirty
-        provider.update(ContentUris.withAppendedId(Events.CONTENT_URI.asSyncAdapter(account), eventId), ContentValues(1).apply {
-            put(Events.DIRTY, 1)
-        }, null, null)
-
-        // this method should mark the event as deleted
-        calendar.deleteDirtyEventsWithoutInstances()
-
-        // verify that event is now marked as deleted
-        provider.query(
-            ContentUris.withAppendedId(Events.CONTENT_URI.asSyncAdapter(account), eventId),
-            arrayOf(Events.DELETED), null, null, null
-        )!!.use { cursor ->
-            cursor.moveToNext()
-            assertEquals(1, cursor.getInt(0))
-        }
-    }
-
-    @Test
-    // Flaky, Needs single or rec init of CalendarProvider (InitCalendarProviderRule)
-    fun testDeleteDirtyEventsWithoutInstances_Recurring_Instances() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with 3 instances"
-            rRules.add(RRule("FREQ=DAILY;COUNT=3"))
-        }
-        val localEvent = LocalEvent(calendar, event, "filename.ics", null, null, LocalResource.FLAG_REMOTELY_PRESENT)
-        localEvent.add()
-        val eventId = localEvent.id!!
-
-        // set event as dirty
-        provider.update(ContentUris.withAppendedId(Events.CONTENT_URI.asSyncAdapter(account), eventId), ContentValues(1).apply {
-            put(Events.DIRTY, 1)
-        }, null, null)
-
-        // this method should mark the event as deleted
-        calendar.deleteDirtyEventsWithoutInstances()
-
-        // verify that event is not marked as deleted
-        provider.query(
-            ContentUris.withAppendedId(Events.CONTENT_URI.asSyncAdapter(account), eventId),
-            arrayOf(Events.DELETED), null, null, null
-        )!!.use { cursor ->
-            cursor.moveToNext()
-            assertEquals(0, cursor.getInt(0))
-        }
-    }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/resource/LocalEventTest.kt

@@ -1,484 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.resource
-
-import android.accounts.Account
-import android.content.ContentProviderClient
-import android.content.ContentUris
-import android.content.ContentValues
-import android.os.Build
-import android.provider.CalendarContract
-import android.provider.CalendarContract.ACCOUNT_TYPE_LOCAL
-import android.provider.CalendarContract.Events
-import androidx.test.platform.app.InstrumentationRegistry
-import at.bitfire.davdroid.InitCalendarProviderRule
-import at.bitfire.ical4android.AndroidCalendar
-import at.bitfire.ical4android.Event
-import at.bitfire.ical4android.util.MiscUtils.closeCompat
-import at.techbee.jtx.JtxContract.asSyncAdapter
-import net.fortuna.ical4j.model.Date
-import net.fortuna.ical4j.model.DateList
-import net.fortuna.ical4j.model.parameter.Value
-import net.fortuna.ical4j.model.property.DtStart
-import net.fortuna.ical4j.model.property.ExDate
-import net.fortuna.ical4j.model.property.RRule
-import net.fortuna.ical4j.model.property.RecurrenceId
-import net.fortuna.ical4j.model.property.Status
-import org.junit.After
-import org.junit.AfterClass
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertNull
-import org.junit.Assert.assertTrue
-import org.junit.Before
-import org.junit.BeforeClass
-import org.junit.ClassRule
-import org.junit.Test
-import org.junit.rules.TestRule
-import java.util.UUID
-
-class LocalEventTest {
-
-    companion object {
-
-        @JvmField
-        @ClassRule
-        val initCalendarProviderRule: TestRule = InitCalendarProviderRule.getInstance()
-
-        private lateinit var provider: ContentProviderClient
-
-        @BeforeClass
-        @JvmStatic
-        fun setUpClass() {
-            val context = InstrumentationRegistry.getInstrumentation().targetContext
-            provider = context.contentResolver.acquireContentProviderClient(CalendarContract.AUTHORITY)!!
-        }
-
-        @AfterClass
-        @JvmStatic
-        fun tearDownClass() {
-            provider.closeCompat()
-        }
-
-    }
-
-    private val account = Account("LocalCalendarTest", ACCOUNT_TYPE_LOCAL)
-    private lateinit var calendar: LocalCalendar
-
-    @Before
-    fun setUp() {
-        val uri = AndroidCalendar.create(account, provider, ContentValues())
-        calendar = AndroidCalendar.findByID(account, provider, LocalCalendar.Factory, ContentUris.parseId(uri))
-    }
-
-    @After
-    fun removeCalendar() {
-        calendar.deleteCollection()
-    }
-
-
-    @Test
-    fun testNumDirectInstances_SingleInstance() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with 1 instance"
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()
-
-        assertEquals(1, LocalEvent.numDirectInstances(provider, account, localEvent.id!!))
-    }
-
-    @Test
-    fun testNumDirectInstances_Recurring() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with 5 instances"
-            rRules.add(RRule("FREQ=DAILY;COUNT=5"))
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()
-
-        assertEquals(5, LocalEvent.numDirectInstances(provider, account, localEvent.id!!))
-    }
-
-    @Test
-    fun testNumDirectInstances_Recurring_Endless() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event without end"
-            rRules.add(RRule("FREQ=DAILY"))
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()
-
-        assertNull(LocalEvent.numDirectInstances(provider, account, localEvent.id!!))
-    }
-
-    @Test
-    // flaky, needs InitCalendarProviderRule
-    fun testNumDirectInstances_Recurring_LateEnd() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with 53 years"
-            rRules.add(RRule("FREQ=YEARLY;UNTIL=20740119T010203Z"))     // year 2074 is not supported by Android <11 Calendar Storage
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()
-
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)
-            assertEquals(52, LocalEvent.numDirectInstances(provider, account, localEvent.id!!))
-        else
-            assertNull(LocalEvent.numDirectInstances(provider, account, localEvent.id!!))
-    }
-
-    @Test
-    // flaky, needs InitCalendarProviderRule
-    fun testNumDirectInstances_Recurring_ManyInstances() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with 2 years"
-            rRules.add(RRule("FREQ=DAILY;UNTIL=20240120T010203Z"))
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()
-        val number = LocalEvent.numDirectInstances(provider, account, localEvent.id!!)
-
-        // Some android versions (i.e. <=Q and S) return 365*2 instances (wrong, 365*2+1 => correct),
-        // but we are satisfied with either result for now
-        assertTrue(number == 365*2 || number == 365*2+1)
-    }
-
-    @Test
-    // flaky, needs InitCalendarProviderRule
-    fun testNumDirectInstances_RecurringWithExdate() {
-        val event = Event().apply {
-            dtStart = DtStart(Date("20220120T010203Z"))
-            summary = "Event with 5 instances"
-            rRules.add(RRule("FREQ=DAILY;COUNT=5"))
-            exDates.add(ExDate(DateList("20220121T010203Z", Value.DATE_TIME)))
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()
-
-        assertEquals(4, LocalEvent.numDirectInstances(provider, account, localEvent.id!!))
-    }
-
-    @Test
-    fun testNumDirectInstances_RecurringWithExceptions() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with 5 instances"
-            rRules.add(RRule("FREQ=DAILY;COUNT=5"))
-            exceptions.add(Event().apply {
-                recurrenceId = RecurrenceId("20220122T010203Z")
-                dtStart = DtStart("20220122T130203Z")
-                summary = "Exception on 3rd day"
-            })
-            exceptions.add(Event().apply {
-                recurrenceId = RecurrenceId("20220124T010203Z")
-                dtStart = DtStart("20220122T160203Z")
-                summary = "Exception on 5th day"
-            })
-        }
-        val localEvent = LocalEvent(calendar, event, "filename.ics", null, null, 0)
-        localEvent.add()
-
-        assertEquals(5-2, LocalEvent.numDirectInstances(provider, account, localEvent.id!!))
-    }
-
-
-    @Test
-    // flaky, needs InitCalendarProviderRule
-    fun testNumInstances_SingleInstance() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with 1 instance"
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()
-
-        assertEquals(1, LocalEvent.numInstances(provider, account, localEvent.id!!))
-    }
-
-    @Test
-    fun testNumInstances_Recurring() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with 5 instances"
-            rRules.add(RRule("FREQ=DAILY;COUNT=5"))
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()
-
-        assertEquals(5, LocalEvent.numInstances(provider, account, localEvent.id!!))
-    }
-
-    @Test
-    fun testNumInstances_Recurring_Endless() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with infinite instances"
-            rRules.add(RRule("FREQ=YEARLY"))
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()
-
-        assertNull(LocalEvent.numInstances(provider, account, localEvent.id!!))
-    }
-
-    @Test
-    // flaky, needs InitCalendarProviderRule
-    fun testNumInstances_Recurring_LateEnd() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event over 22 years"
-            rRules.add(RRule("FREQ=YEARLY;UNTIL=20740119T010203Z"))     // year 2074 not supported by Android <11 Calendar Storage
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()
-
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.R)
-            assertEquals(52, LocalEvent.numInstances(provider, account, localEvent.id!!))
-        else
-            assertNull(LocalEvent.numInstances(provider, account, localEvent.id!!))
-    }
-
-    @Test
-    // flaky, needs InitCalendarProviderRule
-    fun testNumInstances_Recurring_ManyInstances() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event over two years"
-            rRules.add(RRule("FREQ=DAILY;UNTIL=20240120T010203Z"))
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()
-
-        assertEquals(
-            if (Build.VERSION.SDK_INT <= Build.VERSION_CODES.Q)
-                365*2       // Android <10: does not include UNTIL (incorrect!)
-            else
-                365*2 + 1,  // Android ≥10: includes UNTIL (correct)
-            LocalEvent.numInstances(provider, account, localEvent.id!!))
-    }
-
-    @Test
-    fun testNumInstances_RecurringWithExceptions() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with 6 instances"
-            rRules.add(RRule("FREQ=DAILY;COUNT=6"))
-            exceptions.add(Event().apply {
-                recurrenceId = RecurrenceId("20220122T010203Z")
-                dtStart = DtStart("20220122T130203Z")
-                summary = "Exception on 3rd day"
-            })
-            exceptions.add(Event().apply {
-                recurrenceId = RecurrenceId("20220124T010203Z")
-                dtStart = DtStart("20220122T160203Z")
-                summary = "Exception on 5th day"
-            })
-        }
-        val localEvent = LocalEvent(calendar, event, "filename.ics", null, null, 0)
-        val uri = localEvent.add()
-
-        calendar.findById(localEvent.id!!)
-
-        assertEquals(6, LocalEvent.numInstances(provider, account, localEvent.id!!))
-    }
-
-
-    @Test
-    fun testMarkEventAsDeleted() {
-        // Create event
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "A fine event"
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()
-
-        // Delete event
-        LocalEvent.markAsDeleted(provider, account, localEvent.id!!)
-
-        // Get the status of whether the event is deleted
-        provider.query(
-            ContentUris.withAppendedId(Events.CONTENT_URI, localEvent.id!!).asSyncAdapter(account),
-            arrayOf(Events.DELETED),
-            null,
-            null, null
-        )!!.use { cursor ->
-            cursor.moveToFirst()
-            assertEquals(1, cursor.getInt(0))
-        }
-    }
-
-
-    @Test
-    fun testPrepareForUpload_NoUid() {
-        // create event
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event without uid"
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add()    // save it to calendar storage
-
-        // prepare for upload - this should generate a new random uuid, returned as filename
-        val fileNameWithSuffix = localEvent.prepareForUpload()
-        val fileName = fileNameWithSuffix.removeSuffix(".ics")
-
-        // throws an exception if fileName is not an UUID
-        UUID.fromString(fileName)
-
-        // UID in calendar storage should be the same as file name
-        provider.query(
-            ContentUris.withAppendedId(Events.CONTENT_URI, localEvent.id!!).asSyncAdapter(account),
-            arrayOf(Events.UID_2445), null, null, null
-        )!!.use { cursor ->
-            cursor.moveToFirst()
-            assertEquals(fileName, cursor.getString(0))
-        }
-    }
-
-    @Test
-    fun testPrepareForUpload_NormalUid() {
-        // create event
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with normal uid"
-            uid = "some-event@hostname.tld"     // old UID format, UUID would be new format
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add() // save it to calendar storage
-
-        // prepare for upload - this should use the UID for the file name
-        val fileNameWithSuffix = localEvent.prepareForUpload()
-        val fileName = fileNameWithSuffix.removeSuffix(".ics")
-
-        assertEquals(event.uid, fileName)
-
-        // UID in calendar storage should still be set, too
-        provider.query(
-            ContentUris.withAppendedId(Events.CONTENT_URI, localEvent.id!!).asSyncAdapter(account),
-            arrayOf(Events.UID_2445), null, null, null
-        )!!.use { cursor ->
-            cursor.moveToFirst()
-            assertEquals(fileName, cursor.getString(0))
-        }
-    }
-
-    @Test
-    fun testPrepareForUpload_UidHasDangerousChars() {
-        // create event
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with funny uid"
-            uid = "https://www.example.com/events/asdfewfe-cxyb-ewrws-sadfrwerxyvser-asdfxye-"
-        }
-        val localEvent = LocalEvent(calendar, event, null, null, null, 0)
-        localEvent.add() // save it to calendar storage
-
-        // prepare for upload - this should generate a new random uuid, returned as filename
-        val fileNameWithSuffix = localEvent.prepareForUpload()
-        val fileName = fileNameWithSuffix.removeSuffix(".ics")
-
-        // throws an exception if fileName is not an UUID
-        UUID.fromString(fileName)
-
-        // UID in calendar storage shouldn't have been changed
-        provider.query(
-            ContentUris.withAppendedId(Events.CONTENT_URI, localEvent.id!!).asSyncAdapter(account),
-            arrayOf(Events.UID_2445), null, null, null
-        )!!.use { cursor ->
-            cursor.moveToFirst()
-            assertEquals(event.uid, cursor.getString(0))
-        }
-    }
-
-
-    @Test
-    fun testDeleteDirtyEventsWithoutInstances_NoInstances_Exdate() {
-        // TODO
-    }
-
-    @Test
-    fun testDeleteDirtyEventsWithoutInstances_NoInstances_CancelledExceptions() {
-        // create recurring event with only deleted/cancelled instances
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with 3 instances"
-            rRules.add(RRule("FREQ=DAILY;COUNT=3"))
-            exceptions.add(Event().apply {
-                recurrenceId = RecurrenceId("20220120T010203Z")
-                dtStart = DtStart("20220120T010203Z")
-                summary = "Cancelled exception on 1st day"
-                status = Status.VEVENT_CANCELLED
-            })
-            exceptions.add(Event().apply {
-                recurrenceId = RecurrenceId("20220121T010203Z")
-                dtStart = DtStart("20220121T010203Z")
-                summary = "Cancelled exception on 2nd day"
-                status = Status.VEVENT_CANCELLED
-            })
-            exceptions.add(Event().apply {
-                recurrenceId = RecurrenceId("20220122T010203Z")
-                dtStart = DtStart("20220122T010203Z")
-                summary = "Cancelled exception on 3rd day"
-                status = Status.VEVENT_CANCELLED
-            })
-        }
-        val localEvent = LocalEvent(calendar, event, "filename.ics", null, null, LocalResource.FLAG_REMOTELY_PRESENT)
-        localEvent.add()
-        val eventId = localEvent.id!!
-
-        // set event as dirty
-        provider.update(ContentUris.withAppendedId(Events.CONTENT_URI.asSyncAdapter(account), eventId), ContentValues(1).apply {
-            put(Events.DIRTY, 1)
-        }, null, null)
-
-        // this method should mark the event as deleted
-        calendar.deleteDirtyEventsWithoutInstances()
-
-        // verify that event is now marked as deleted
-        provider.query(
-            ContentUris.withAppendedId(Events.CONTENT_URI.asSyncAdapter(account), eventId),
-            arrayOf(Events.DELETED), null, null, null
-        )!!.use { cursor ->
-            cursor.moveToNext()
-            assertEquals(1, cursor.getInt(0))
-        }
-    }
-
-    @Test
-    fun testDeleteDirtyEventsWithoutInstances_Recurring_Instances() {
-        val event = Event().apply {
-            dtStart = DtStart("20220120T010203Z")
-            summary = "Event with 3 instances"
-            rRules.add(RRule("FREQ=DAILY;COUNT=3"))
-        }
-        val localEvent = LocalEvent(calendar, event, "filename.ics", null, null, LocalResource.FLAG_REMOTELY_PRESENT)
-        localEvent.add()
-        val eventId = localEvent.id!!
-
-        // set event as dirty
-        provider.update(ContentUris.withAppendedId(Events.CONTENT_URI.asSyncAdapter(account), eventId), ContentValues(1).apply {
-            put(Events.DIRTY, 1)
-        }, null, null)
-
-        // this method should mark the event as deleted
-        calendar.deleteDirtyEventsWithoutInstances()
-
-        // verify that event is not marked as deleted
-        provider.query(
-            ContentUris.withAppendedId(Events.CONTENT_URI.asSyncAdapter(account), eventId),
-            arrayOf(Events.DELETED), null, null, null
-        )!!.use { cursor ->
-            cursor.moveToNext()
-            assertEquals(0, cursor.getInt(0))
-        }
-    }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/resource/LocalGroupTest.kt

@@ -1,281 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.resource
-
-import android.Manifest
-import android.content.ContentProviderClient
-import android.content.ContentUris
-import android.content.ContentValues
-import android.content.Context
-import android.provider.ContactsContract
-import android.provider.ContactsContract.CommonDataKinds.GroupMembership
-import androidx.test.platform.app.InstrumentationRegistry
-import androidx.test.rule.GrantPermissionRule
-import at.bitfire.vcard4android.BatchOperation
-import at.bitfire.vcard4android.CachedGroupMembership
-import at.bitfire.vcard4android.Contact
-import at.bitfire.vcard4android.GroupMethod
-import dagger.hilt.android.qualifiers.ApplicationContext
-import dagger.hilt.android.testing.HiltAndroidRule
-import dagger.hilt.android.testing.HiltAndroidTest
-import org.junit.AfterClass
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertFalse
-import org.junit.Assert.assertNotNull
-import org.junit.Assert.assertNull
-import org.junit.Assert.assertTrue
-import org.junit.Before
-import org.junit.BeforeClass
-import org.junit.ClassRule
-import org.junit.Rule
-import org.junit.Test
-import javax.inject.Inject
-
-@HiltAndroidTest
-class LocalGroupTest {
-
-    companion object {
-
-        @JvmField
-        @ClassRule
-        val permissionRule = GrantPermissionRule.grant(Manifest.permission.READ_CONTACTS, Manifest.permission.WRITE_CONTACTS)!!
-
-        private lateinit var provider: ContentProviderClient
-
-        @BeforeClass
-        @JvmStatic
-        fun connect() {
-            val context = InstrumentationRegistry.getInstrumentation().targetContext
-            provider = context.contentResolver.acquireContentProviderClient(ContactsContract.AUTHORITY)!!
-            assertNotNull(provider)
-        }
-
-        @AfterClass
-        @JvmStatic
-        fun disconnect() {
-            provider.close()
-        }
-    }
-
-    @get:Rule
-    val hiltRule = HiltAndroidRule(this)
-
-    @Inject
-    @ApplicationContext
-    lateinit var context: Context
-
-    @Inject
-    lateinit var addressbookFactory: LocalTestAddressBook.Factory
-
-
-    private lateinit var addressBookGroupsAsCategories: LocalTestAddressBook
-    private lateinit var addressBookGroupsAsVCards: LocalTestAddressBook
-
-    @Before
-    fun setup() {
-        hiltRule.inject()
-
-        addressBookGroupsAsCategories = addressbookFactory.create(provider, GroupMethod.CATEGORIES)
-        addressBookGroupsAsVCards = addressbookFactory.create(provider, GroupMethod.GROUP_VCARDS)
-
-        // clear contacts
-        addressBookGroupsAsCategories.clear()
-        addressBookGroupsAsVCards.clear()
-    }
-
-
-    @Test
-    fun testApplyPendingMemberships_addPendingMembership() {
-        val ab = addressBookGroupsAsVCards
-
-        val contact1 = LocalContact(ab, Contact().apply {
-            uid = "test1"
-            displayName = "Test"
-        }, "test1.vcf", null, 0)
-        contact1.add()
-
-        val group = newGroup(ab)
-        // set pending membership of contact1
-        ab.provider!!.update(
-            ContentUris.withAppendedId(ab.groupsSyncUri(), group.id!!),
-            ContentValues().apply {
-                put(LocalGroup.COLUMN_PENDING_MEMBERS, LocalGroup.PendingMemberships(setOf("test1")).toString())
-            },
-            null, null
-        )
-
-        // pending membership -> contact1 should be added to group
-        LocalGroup.applyPendingMemberships(ab)
-
-        // check group membership
-        ab.provider!!.query(
-            ab.syncAdapterURI(ContactsContract.Data.CONTENT_URI), arrayOf(GroupMembership.GROUP_ROW_ID, GroupMembership.RAW_CONTACT_ID),
-            "${GroupMembership.MIMETYPE}=?", arrayOf(GroupMembership.CONTENT_ITEM_TYPE),
-            null
-        )!!.use { cursor ->
-            assertTrue(cursor.moveToNext())
-            assertEquals(group.id, cursor.getLong(0))
-            assertEquals(contact1.id, cursor.getLong(1))
-
-            assertFalse(cursor.moveToNext())
-        }
-        // check cached group membership
-        ab.provider!!.query(
-            ab.syncAdapterURI(ContactsContract.Data.CONTENT_URI), arrayOf(CachedGroupMembership.GROUP_ID, CachedGroupMembership.RAW_CONTACT_ID),
-            "${CachedGroupMembership.MIMETYPE}=?", arrayOf(CachedGroupMembership.CONTENT_ITEM_TYPE),
-            null
-        )!!.use { cursor ->
-            assertTrue(cursor.moveToNext())
-            assertEquals(group.id, cursor.getLong(0))
-            assertEquals(contact1.id, cursor.getLong(1))
-
-            assertFalse(cursor.moveToNext())
-        }
-    }
-
-    @Test
-    fun testApplyPendingMemberships_removeMembership() {
-        val ab = addressBookGroupsAsVCards
-
-        val contact1 = LocalContact(ab, Contact().apply {
-            uid = "test1"
-            displayName = "Test"
-        }, "test1.vcf", null, 0)
-        contact1.add()
-
-        val group = newGroup(ab)
-
-        // add contact1 to group
-        val batch = BatchOperation(ab.provider!!)
-        contact1.addToGroup(batch, group.id!!)
-        batch.commit()
-
-        // no pending memberships -> membership should be removed
-        LocalGroup.applyPendingMemberships(ab)
-
-        // check group membership
-        ab.provider!!.query(
-            ab.syncAdapterURI(ContactsContract.Data.CONTENT_URI), arrayOf(GroupMembership.GROUP_ROW_ID, GroupMembership.RAW_CONTACT_ID),
-            "${GroupMembership.MIMETYPE}=?", arrayOf(GroupMembership.CONTENT_ITEM_TYPE),
-            null
-        )!!.use { cursor ->
-            assertFalse(cursor.moveToNext())
-        }
-        // check cached group membership
-        ab.provider!!.query(
-            ab.syncAdapterURI(ContactsContract.Data.CONTENT_URI), arrayOf(CachedGroupMembership.GROUP_ID, CachedGroupMembership.RAW_CONTACT_ID),
-            "${CachedGroupMembership.MIMETYPE}=?", arrayOf(CachedGroupMembership.CONTENT_ITEM_TYPE),
-            null
-        )!!.use { cursor ->
-            assertFalse(cursor.moveToNext())
-        }
-    }
-
-
-    @Test
-    fun testClearDirty_addCachedGroupMembership() {
-        val ab = addressBookGroupsAsCategories
-        val group = newGroup(ab)
-
-        val contact1 = LocalContact(ab, Contact().apply { displayName = "Test" }, "fn.vcf", null, 0)
-        contact1.add()
-
-        // insert group membership, but no cached group membership
-        ab.provider!!.insert(
-            ab.syncAdapterURI(ContactsContract.Data.CONTENT_URI), ContentValues().apply {
-                put(GroupMembership.MIMETYPE, GroupMembership.CONTENT_ITEM_TYPE)
-                put(GroupMembership.RAW_CONTACT_ID, contact1.id)
-                put(GroupMembership.GROUP_ROW_ID, group.id)
-            }
-        )
-
-        group.clearDirty(null, null)
-
-        // check cached group membership
-        ab.provider!!.query(
-            ab.syncAdapterURI(ContactsContract.Data.CONTENT_URI), arrayOf(CachedGroupMembership.GROUP_ID, CachedGroupMembership.RAW_CONTACT_ID),
-            "${CachedGroupMembership.MIMETYPE}=?", arrayOf(CachedGroupMembership.CONTENT_ITEM_TYPE),
-            null
-        )!!.use { cursor ->
-            assertTrue(cursor.moveToNext())
-            assertEquals(group.id, cursor.getLong(0))
-            assertEquals(contact1.id, cursor.getLong(1))
-
-            assertFalse(cursor.moveToNext())
-        }
-    }
-
-    @Test
-    fun testClearDirty_removeCachedGroupMembership() {
-        val ab = addressBookGroupsAsCategories
-        val group = newGroup(ab)
-
-        val contact1 = LocalContact(ab, Contact().apply { displayName = "Test" }, "fn.vcf", null, 0)
-        contact1.add()
-
-        // insert cached group membership, but no group membership
-        ab.provider!!.insert(
-            ab.syncAdapterURI(ContactsContract.Data.CONTENT_URI), ContentValues().apply {
-                put(CachedGroupMembership.MIMETYPE, CachedGroupMembership.CONTENT_ITEM_TYPE)
-                put(CachedGroupMembership.RAW_CONTACT_ID, contact1.id)
-                put(CachedGroupMembership.GROUP_ID, group.id)
-            }
-        )
-
-        group.clearDirty(null, null)
-
-        // cached group membership should be gone
-        ab.provider!!.query(
-            ab.syncAdapterURI(ContactsContract.Data.CONTENT_URI), arrayOf(CachedGroupMembership.GROUP_ID, CachedGroupMembership.RAW_CONTACT_ID),
-            "${CachedGroupMembership.MIMETYPE}=?", arrayOf(CachedGroupMembership.CONTENT_ITEM_TYPE),
-            null
-        )!!.use { cursor ->
-            assertFalse(cursor.moveToNext())
-        }
-    }
-
-
-    @Test
-    fun testMarkMembersDirty() {
-        val ab = addressBookGroupsAsCategories
-        val group = newGroup(ab)
-
-        val contact1 = LocalContact(ab, Contact().apply { displayName = "Test" }, "fn.vcf", null, 0)
-        contact1.add()
-
-        val batch = BatchOperation(ab.provider!!)
-        contact1.addToGroup(batch, group.id!!)
-        batch.commit()
-
-        assertEquals(0, ab.findDirty().size)
-        group.markMembersDirty()
-        assertEquals(contact1.id, ab.findDirty().first().id)
-    }
-
-
-    @Test
-    fun testPrepareForUpload() {
-        val group = newGroup()
-        assertNull(group.getContact().uid)
-
-        val fileName = group.prepareForUpload()
-        val newUid = group.getContact().uid
-        assertNotNull(newUid)
-        assertEquals("$newUid.vcf", fileName)
-    }
-
-
-    // helpers
-
-    private fun newGroup(addressBook: LocalAddressBook = addressBookGroupsAsCategories): LocalGroup =
-        LocalGroup(addressBook,
-            Contact().apply {
-                displayName = "Test Group"
-            }, null, null, 0
-        ).apply {
-            add()
-        }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/servicedetection/CollectionListRefresherTest.kt

@@ -1,718 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.servicedetection
-
-import android.content.Context
-import android.security.NetworkSecurityPolicy
-import at.bitfire.davdroid.db.AppDatabase
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.HomeSet
-import at.bitfire.davdroid.db.Principal
-import at.bitfire.davdroid.db.Service
-import at.bitfire.davdroid.network.HttpClient
-import at.bitfire.davdroid.settings.Settings
-import at.bitfire.davdroid.settings.SettingsManager
-import dagger.hilt.android.qualifiers.ApplicationContext
-import dagger.hilt.android.testing.HiltAndroidRule
-import dagger.hilt.android.testing.HiltAndroidTest
-import io.mockk.every
-import io.mockk.mockkObject
-import okhttp3.mockwebserver.Dispatcher
-import okhttp3.mockwebserver.MockResponse
-import okhttp3.mockwebserver.MockWebServer
-import okhttp3.mockwebserver.RecordedRequest
-import org.junit.After
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertFalse
-import org.junit.Assert.assertTrue
-import org.junit.Assume
-import org.junit.Before
-import org.junit.Rule
-import org.junit.Test
-import java.util.logging.Logger
-import javax.inject.Inject
-
-@HiltAndroidTest
-class CollectionListRefresherTest {
-
-    companion object {
-        private const val PATH_CALDAV = "/caldav"
-        private const val PATH_CARDDAV = "/carddav"
-
-        private const val SUBPATH_PRINCIPAL = "/principal"
-        private const val SUBPATH_PRINCIPAL_INACCESSIBLE = "/inaccessible-principal"
-        private const val SUBPATH_PRINCIPAL_WITHOUT_COLLECTIONS = "/principal2"
-        private const val SUBPATH_ADDRESSBOOK_HOMESET = "/addressbooks-homeset"
-        private const val SUBPATH_ADDRESSBOOK_HOMESET_EMPTY = "/addressbooks-homeset-empty"
-        private const val SUBPATH_ADDRESSBOOK = "/addressbooks/my-contacts"
-        private const val SUBPATH_ADDRESSBOOK_INACCESSIBLE = "/addressbooks/inaccessible-contacts"
-    }
-
-    @get:Rule
-    var hiltRule = HiltAndroidRule(this)
-
-    @Inject
-    @ApplicationContext
-    lateinit var context: Context
-
-    @Inject
-    lateinit var db: AppDatabase
-
-    @Inject
-    lateinit var logger: Logger
-
-    @Inject
-    lateinit var refresherFactory: CollectionListRefresher.Factory
-
-    @Inject
-    lateinit var settings: SettingsManager
-
-    private val mockServer = MockWebServer()
-    private lateinit var client: HttpClient
-
-    @Before
-    fun setup() {
-        hiltRule.inject()
-
-        // Start mock web server
-        mockServer.dispatcher = TestDispatcher(logger)
-        mockServer.start()
-
-        client = HttpClient.Builder(context).build()
-
-        Assume.assumeTrue(NetworkSecurityPolicy.getInstance().isCleartextTrafficPermitted)
-    }
-
-    @After
-    fun teardown() {
-        mockServer.shutdown()
-        db.close()
-    }
-
-
-    @Test
-    fun testDiscoverHomesets() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-        val baseUrl = mockServer.url(PATH_CARDDAV + SUBPATH_PRINCIPAL)
-
-        // Query home sets
-        refresherFactory.create(service, client.okHttpClient).discoverHomesets(baseUrl)
-
-        // Check home sets have been saved to database
-        assertEquals(mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_HOMESET/"), db.homeSetDao().getByService(service.id).first().url)
-        assertEquals(1, db.homeSetDao().getByService(service.id).size)
-    }
-
-
-    // refreshHomesetsAndTheirCollections
-
-    @Test
-    fun refreshHomesetsAndTheirCollections_addsNewCollection() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        // save homeset in DB
-        val homesetId = db.homeSetDao().insert(
-            HomeSet(id=0, service.id, true, mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_HOMESET"))
-        )
-
-        // Refresh
-        refresherFactory.create(service, client.okHttpClient).refreshHomesetsAndTheirCollections()
-
-        // Check the collection defined in homeset is now in the database
-        assertEquals(
-            Collection(
-                1,
-                service.id,
-                homesetId,
-                1, // will have gotten an owner too
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/"),
-                displayName = "My Contacts",
-                description = "My Contacts Description"
-            ),
-            db.collectionDao().getByService(service.id).first()
-        )
-    }
-
-    @Test
-    fun refreshHomesetsAndTheirCollections_updatesExistingCollection() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        // save "old" collection in DB
-        val collectionId = db.collectionDao().insertOrUpdateByUrl(
-            Collection(
-                0,
-                service.id,
-                null,
-                null,
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/"),
-                displayName = "My Contacts",
-                description = "My Contacts Description"
-            )
-        )
-
-        // Refresh
-        refresherFactory.create(service, client.okHttpClient).refreshHomesetsAndTheirCollections()
-
-        // Check the collection got updated
-        assertEquals(
-            Collection(
-                collectionId,
-                service.id,
-                null,
-                null,
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/"),
-                displayName = "My Contacts",
-                description = "My Contacts Description"
-            ),
-            db.collectionDao().get(collectionId)
-        )
-    }
-
-    @Test
-    fun refreshHomesetsAndTheirCollections_preservesCollectionFlags() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        // save "old" collection in DB - with set flags
-        val collectionId = db.collectionDao().insertOrUpdateByUrl(
-            Collection(
-                0,
-                service.id,
-                null,
-                null,
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/"),
-                displayName = "My Contacts",
-                description = "My Contacts Description",
-                forceReadOnly = true,
-                sync = true
-            )
-        )
-
-        // Refresh
-        refresherFactory.create(service, client.okHttpClient).refreshHomesetsAndTheirCollections()
-
-        // Check the collection got updated
-        assertEquals(
-            Collection(
-                collectionId,
-                service.id,
-                null,
-                null,
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/"),
-                displayName = "My Contacts",
-                description = "My Contacts Description",
-                forceReadOnly = true,
-                sync = true
-            ),
-            db.collectionDao().get(collectionId)
-        )
-    }
-
-    @Test
-    fun refreshHomesetsAndTheirCollections_marksRemovedCollectionsAsHomeless() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        // save homeset in DB - which is empty (zero address books) on the serverside
-        val homesetId = db.homeSetDao().insert(
-            HomeSet(id=0, service.id, true, mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_HOMESET_EMPTY"))
-        )
-
-        // place collection in DB - as part of the homeset
-        val collectionId = db.collectionDao().insertOrUpdateByUrl(
-            Collection(
-                0,
-                service.id,
-                homesetId,
-                null,
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/")
-            )
-        )
-
-        // Refresh - should mark collection as homeless, because serverside homeset is empty.
-        refresherFactory.create(service, client.okHttpClient).refreshHomesetsAndTheirCollections()
-
-        // Check the collection, is now marked as homeless
-        assertEquals(null, db.collectionDao().get(collectionId)!!.homeSetId)
-    }
-
-    @Test
-    fun refreshHomesetsAndTheirCollections_addsOwnerUrls() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        // save a homeset in DB
-        val homesetId = db.homeSetDao().insert(
-            HomeSet(id=0, service.id, true, mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_HOMESET"))
-        )
-
-        // place collection in DB - as part of the homeset
-        val collectionId = db.collectionDao().insertOrUpdateByUrl(
-            Collection(
-                0,
-                service.id,
-                homesetId, // part of above home set
-                null,
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/")
-            )
-        )
-
-        // Refresh - homesets and their collections
-        assertEquals(0, db.principalDao().getByService(service.id).size)
-        refresherFactory.create(service, client.okHttpClient).refreshHomesetsAndTheirCollections()
-
-        // Check principal saved and the collection was updated with its reference
-        val principals = db.principalDao().getByService(service.id)
-        assertEquals(1, principals.size)
-        assertEquals(mockServer.url("$PATH_CARDDAV$SUBPATH_PRINCIPAL"), principals[0].url)
-        assertEquals(null, principals[0].displayName)
-        assertEquals(
-            principals[0].id,
-            db.collectionDao().get(collectionId)!!.ownerId
-        )
-    }
-
-
-    // refreshHomelessCollections
-
-    @Test
-    fun refreshHomelessCollections_updatesExistingCollection() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        // place homeless collection in DB
-        val collectionId = db.collectionDao().insertOrUpdateByUrl(
-            Collection(
-                0,
-                service.id,
-                null,
-                null,
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/"),
-            )
-        )
-
-        // Refresh
-        refresherFactory.create(service, client.okHttpClient).refreshHomelessCollections()
-
-        // Check the collection got updated - with display name and description
-        assertEquals(
-            Collection(
-                collectionId,
-                service.id,
-                null,
-                1, // will have gotten an owner too
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/"),
-                displayName = "My Contacts",
-                description = "My Contacts Description"
-            ),
-            db.collectionDao().get(collectionId)
-        )
-    }
-
-    @Test
-    fun refreshHomelessCollections_deletesInaccessibleCollections() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        // place homeless collection in DB - it is also inaccessible
-        val collectionId = db.collectionDao().insertOrUpdateByUrl(
-            Collection(
-                0,
-                service.id,
-                null,
-                null,
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_INACCESSIBLE")
-            )
-        )
-
-        // Refresh - should delete collection
-        refresherFactory.create(service, client.okHttpClient).refreshHomelessCollections()
-
-        // Check the collection got deleted
-        assertEquals(null, db.collectionDao().get(collectionId))
-    }
-
-    @Test
-    fun refreshHomelessCollections_addsOwnerUrls() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        // place homeless collection in DB
-        val collectionId = db.collectionDao().insertOrUpdateByUrl(
-            Collection(
-                0,
-                service.id,
-                null,
-                null,
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/"),
-            )
-        )
-
-        // Refresh homeless collections
-        assertEquals(0, db.principalDao().getByService(service.id).size)
-        refresherFactory.create(service, client.okHttpClient).refreshHomelessCollections()
-
-        // Check principal saved and the collection was updated with its reference
-        val principals = db.principalDao().getByService(service.id)
-        assertEquals(1, principals.size)
-        assertEquals(mockServer.url("$PATH_CARDDAV$SUBPATH_PRINCIPAL"), principals[0].url)
-        assertEquals(null, principals[0].displayName)
-        assertEquals(
-            principals[0].id,
-            db.collectionDao().get(collectionId)!!.ownerId
-        )
-    }
-
-
-    // refreshPrincipals
-
-    @Test
-    fun refreshPrincipals_inaccessiblePrincipal() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        // place principal without display name in db
-        val principalId = db.principalDao().insert(
-            Principal(
-                0,
-                service.id,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_PRINCIPAL_INACCESSIBLE"), // no trailing slash
-                null // no display name for now
-            )
-        )
-        // add an associated collection - as the principal is rightfully removed otherwise
-        db.collectionDao().insertOrUpdateByUrl(
-            Collection(
-                0,
-                service.id,
-                null,
-                principalId, // create association with principal
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/"), // with trailing slash
-            )
-        )
-
-        // Refresh principals
-        refresherFactory.create(service, client.okHttpClient).refreshPrincipals()
-
-        // Check principal was not updated
-        val principals = db.principalDao().getByService(service.id)
-        assertEquals(1, principals.size)
-        assertEquals(mockServer.url("$PATH_CARDDAV$SUBPATH_PRINCIPAL_INACCESSIBLE"), principals[0].url)
-        assertEquals(null, principals[0].displayName)
-    }
-
-    @Test
-    fun refreshPrincipals_updatesPrincipal() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        // place principal without display name in db
-        val principalId = db.principalDao().insert(
-            Principal(
-                0,
-                service.id,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_PRINCIPAL"), // no trailing slash
-                null // no display name for now
-            )
-        )
-        // add an associated collection - as the principal is rightfully removed otherwise
-        db.collectionDao().insertOrUpdateByUrl(
-            Collection(
-                0,
-                service.id,
-                null,
-                principalId, // create association with principal
-                Collection.TYPE_ADDRESSBOOK,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/"), // with trailing slash
-            )
-        )
-
-        // Refresh principals
-        refresherFactory.create(service, client.okHttpClient).refreshPrincipals()
-
-        // Check principal now got a display name
-        val principals = db.principalDao().getByService(service.id)
-        assertEquals(1, principals.size)
-        assertEquals(mockServer.url("$PATH_CARDDAV$SUBPATH_PRINCIPAL"), principals[0].url)
-        assertEquals("Mr. Wobbles", principals[0].displayName)
-    }
-
-    @Test
-    fun refreshPrincipals_deletesPrincipalsWithoutCollections() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        // place principal without collections in DB
-        db.principalDao().insert(
-            Principal(
-                0,
-                service.id,
-                mockServer.url("$PATH_CARDDAV$SUBPATH_PRINCIPAL_WITHOUT_COLLECTIONS/")
-            )
-        )
-
-        // Refresh principals - detecting it does not own collections
-        refresherFactory.create(service, client.okHttpClient).refreshPrincipals()
-
-        // Check principal was deleted
-        val principals = db.principalDao().getByService(service.id)
-        assertEquals(0, principals.size)
-    }
-
-    // Others
-
-    @Test
-    fun shouldPreselect_none() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        mockkObject(settings) {
-            every { settings.getIntOrNull(Settings.PRESELECT_COLLECTIONS) } returns Settings.PRESELECT_COLLECTIONS_NONE
-            every { settings.getString(Settings.PRESELECT_COLLECTIONS_EXCLUDED) } returns ""
-
-            val collection = Collection(
-                0,
-                service.id,
-                0,
-                type = Collection.TYPE_ADDRESSBOOK,
-                url = mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/")
-            )
-            val homesets = listOf(
-                HomeSet(0, service.id, true, mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_HOMESET"))
-            )
-
-            val refresher = refresherFactory.create(service, client.okHttpClient)
-            assertFalse(refresher.shouldPreselect(collection, homesets))
-        }
-    }
-
-    @Test
-    fun shouldPreselect_all() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        mockkObject(settings) {
-            every { settings.getIntOrNull(Settings.PRESELECT_COLLECTIONS) } returns Settings.PRESELECT_COLLECTIONS_ALL
-            every { settings.getString(Settings.PRESELECT_COLLECTIONS_EXCLUDED) } returns ""
-
-            val collection = Collection(
-                0,
-                service.id,
-                0,
-                type = Collection.TYPE_ADDRESSBOOK,
-                url = mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/")
-            )
-            val homesets = listOf(
-                HomeSet(0, service.id, false, mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_HOMESET"))
-            )
-
-            val refresher = refresherFactory.create(service, client.okHttpClient)
-            assertTrue(refresher.shouldPreselect(collection, homesets))
-        }
-    }
-
-    @Test
-    fun shouldPreselect_all_blacklisted() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-        val url = mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/")
-
-        mockkObject(settings) {
-            every { settings.getIntOrNull(Settings.PRESELECT_COLLECTIONS) } returns Settings.PRESELECT_COLLECTIONS_ALL
-            every { settings.getString(Settings.PRESELECT_COLLECTIONS_EXCLUDED) } returns url.toString()
-
-            val collection = Collection(
-                0,
-                service.id,
-                0,
-                type = Collection.TYPE_ADDRESSBOOK,
-                url = url
-            )
-            val homesets = listOf(
-                HomeSet(0, service.id, false, mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_HOMESET"))
-            )
-
-            val refresher = refresherFactory.create(service, client.okHttpClient)
-            assertFalse(refresher.shouldPreselect(collection, homesets))
-        }
-    }
-
-    @Test
-    fun shouldPreselect_personal_notPersonal() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        mockkObject(settings) {
-            every { settings.getIntOrNull(Settings.PRESELECT_COLLECTIONS) } returns Settings.PRESELECT_COLLECTIONS_PERSONAL
-            every { settings.getString(Settings.PRESELECT_COLLECTIONS_EXCLUDED) } returns ""
-
-            val collection = Collection(
-                0,
-                service.id,
-                0,
-                type = Collection.TYPE_ADDRESSBOOK,
-                url = mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/")
-            )
-            val homesets = listOf(
-                HomeSet(0, service.id, false, mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_HOMESET"))
-            )
-
-            val refresher = refresherFactory.create(service, client.okHttpClient)
-            assertFalse(refresher.shouldPreselect(collection, homesets))
-        }
-    }
-
-    @Test
-    fun shouldPreselect_personal_isPersonal() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-
-        mockkObject(settings) {
-            every { settings.getIntOrNull(Settings.PRESELECT_COLLECTIONS) } returns Settings.PRESELECT_COLLECTIONS_PERSONAL
-            every { settings.getString(Settings.PRESELECT_COLLECTIONS_EXCLUDED) } returns ""
-
-            val collection = Collection(
-                0,
-                service.id,
-                0,
-                type = Collection.TYPE_ADDRESSBOOK,
-                url = mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/")
-            )
-            val homesets = listOf(
-                HomeSet(0, service.id, true, mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_HOMESET"))
-            )
-
-            val refresher = refresherFactory.create(service, client.okHttpClient)
-            assertTrue(refresher.shouldPreselect(collection, homesets))
-        }
-    }
-
-    @Test
-    fun shouldPreselect_personal_isPersonalButBlacklisted() {
-        val service = createTestService(Service.TYPE_CARDDAV)!!
-        val collectionUrl = mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/")
-
-        mockkObject(settings) {
-            every { settings.getIntOrNull(Settings.PRESELECT_COLLECTIONS) } returns Settings.PRESELECT_COLLECTIONS_PERSONAL
-            every { settings.getString(Settings.PRESELECT_COLLECTIONS_EXCLUDED) } returns collectionUrl.toString()
-
-            val collection = Collection(
-                0,
-                service.id,
-                0,
-                type = Collection.TYPE_ADDRESSBOOK,
-                url = collectionUrl
-            )
-            val homesets = listOf(
-                HomeSet(0, service.id, true, mockServer.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_HOMESET"))
-            )
-
-            val refresher = refresherFactory.create(service, client.okHttpClient)
-            assertFalse(refresher.shouldPreselect(collection, homesets))
-        }
-    }
-
-    // Test helpers and dependencies
-    
-    private fun createTestService(serviceType: String) : Service? {
-        val service = Service(id=0, accountName="test", type=serviceType, principal = null)
-        val serviceId = db.serviceDao().insertOrReplace(service)
-        return db.serviceDao().get(serviceId)
-    }
-
-
-    class TestDispatcher(
-        private val logger: Logger
-    ): Dispatcher() {
-
-        override fun dispatch(request: RecordedRequest): MockResponse {
-            val path = request.path!!.trimEnd('/')
-
-            if (request.method.equals("PROPFIND", true)) {
-                val properties = when (path) {
-                    PATH_CALDAV,
-                    PATH_CARDDAV ->
-                        "<current-user-principal>" +
-                        "   <href>$path${SUBPATH_PRINCIPAL}</href>" +
-                        "</current-user-principal>"
-
-                    PATH_CARDDAV + SUBPATH_PRINCIPAL ->
-                        "<resourcetype><principal/></resourcetype>" +
-                        "<displayname>Mr. Wobbles</displayname>" +
-                        "<CARD:addressbook-home-set>" +
-                        "   <href>${PATH_CARDDAV}${SUBPATH_ADDRESSBOOK_HOMESET}</href>" +
-                        "</CARD:addressbook-home-set>"
-
-                    PATH_CARDDAV + SUBPATH_PRINCIPAL_WITHOUT_COLLECTIONS ->
-                        "<CARD:addressbook-home-set>" +
-                        "   <href>${PATH_CARDDAV}${SUBPATH_ADDRESSBOOK_HOMESET_EMPTY}</href>" +
-                        "</CARD:addressbook-home-set>" +
-                        "<displayname>Mr. Wobbles Jr.</displayname>"
-
-                    PATH_CARDDAV + SUBPATH_ADDRESSBOOK,
-                    PATH_CARDDAV + SUBPATH_ADDRESSBOOK_HOMESET ->
-                        "<resourcetype>" +
-                        "   <collection/>" +
-                        "   <CARD:addressbook/>" +
-                        "</resourcetype>" +
-                        "<displayname>My Contacts</displayname>" +
-                        "<CARD:addressbook-description>My Contacts Description</CARD:addressbook-description>" +
-                        "<owner>" +
-                        "   <href>${PATH_CARDDAV + SUBPATH_PRINCIPAL}</href>" +
-                        "</owner>"
-
-                    PATH_CALDAV + SUBPATH_PRINCIPAL ->
-                        "<CAL:calendar-user-address-set>" +
-                        "  <href>urn:unknown-entry</href>" +
-                        "  <href>mailto:email1@example.com</href>" +
-                        "  <href>mailto:email2@example.com</href>" +
-                        "</CAL:calendar-user-address-set>"
-
-                    SUBPATH_ADDRESSBOOK_HOMESET_EMPTY -> ""
-
-                    else -> ""
-                }
-
-                var responseBody = ""
-                var responseCode = 207
-                when (path) {
-                    PATH_CARDDAV + SUBPATH_ADDRESSBOOK_HOMESET ->
-                        responseBody =
-                            "<multistatus xmlns='DAV:' xmlns:CARD='urn:ietf:params:xml:ns:carddav' xmlns:CAL='urn:ietf:params:xml:ns:caldav'>" +
-                            "<response>" +
-                            "   <href>${PATH_CARDDAV + SUBPATH_ADDRESSBOOK}</href>" +
-                            "   <propstat><prop>" +
-                                    properties +
-                            "   </prop></propstat>" +
-                            "   <status>HTTP/1.1 200 OK</status>" +
-                            "</response>" +
-                            "</multistatus>"
-
-                    PATH_CARDDAV + SUBPATH_PRINCIPAL_INACCESSIBLE,
-                    PATH_CARDDAV + SUBPATH_ADDRESSBOOK_INACCESSIBLE ->
-                        responseCode = 404
-
-                    else ->
-                        responseBody =
-                            "<multistatus xmlns='DAV:' xmlns:CARD='urn:ietf:params:xml:ns:carddav' xmlns:CAL='urn:ietf:params:xml:ns:caldav'>" +
-                            "<response>" +
-                            "   <href>$path</href>" +
-                            "   <propstat><prop>"+
-                                    properties +
-                            "   </prop></propstat>" +
-                            "</response>" +
-                            "</multistatus>"
-                }
-
-                logger.info("Queried: $path")
-                logger.info("Response: $responseBody")
-                return MockResponse()
-                    .setResponseCode(responseCode)
-                    .setBody(responseBody)
-            }
-
-            return MockResponse().setResponseCode(404)
-        }
-
-    }
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/sync/SyncerTest.kt

@@ -1,207 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.sync
-
-import android.accounts.Account
-import android.content.ContentProviderClient
-import android.content.SyncResult
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.sync.account.TestAccountAuthenticator
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedFactory
-import dagger.assisted.AssistedInject
-import dagger.hilt.android.testing.HiltAndroidRule
-import dagger.hilt.android.testing.HiltAndroidTest
-import io.mockk.every
-import io.mockk.mockk
-import io.mockk.spyk
-import io.mockk.verify
-import okhttp3.HttpUrl.Companion.toHttpUrl
-import org.junit.After
-import org.junit.Assert.assertArrayEquals
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertTrue
-import org.junit.Before
-import org.junit.Rule
-import org.junit.Test
-import javax.inject.Inject
-
-@HiltAndroidTest
-class SyncerTest {
-
-    @get:Rule
-    val hiltRule = HiltAndroidRule(this)
-
-    @Inject
-    lateinit var testSyncer: TestSyncer.Factory
-
-    lateinit var account: Account
-
-    private lateinit var syncer: TestSyncer
-
-    @Before
-    fun setUp() {
-        hiltRule.inject()
-
-        account = TestAccountAuthenticator.create()
-        syncer = spyk(testSyncer.create(account, emptyArray(), SyncResult()))
-    }
-
-    @After
-    fun tearDown() {
-        TestAccountAuthenticator.remove(account)
-    }
-
-
-    @Test
-    fun testSync_prepare_fails() {
-        val provider = mockk<ContentProviderClient>()
-        every { syncer.prepare(provider) } returns false
-        every { syncer.getSyncEnabledCollections() } returns emptyMap()
-
-        // Should stop the sync after prepare returns false
-        syncer.sync(provider)
-        verify(exactly = 1) { syncer.prepare(provider) }
-        verify(exactly = 0) { syncer.getSyncEnabledCollections() }
-    }
-
-    @Test
-    fun testSync_prepare_succeeds() {
-        val provider = mockk<ContentProviderClient>()
-        every { syncer.prepare(provider) } returns true
-        every { syncer.getSyncEnabledCollections() } returns emptyMap()
-
-        // Should continue the sync after prepare returns true
-        syncer.sync(provider)
-        verify(exactly = 1) { syncer.prepare(provider) }
-        verify(exactly = 1) { syncer.getSyncEnabledCollections() }
-    }
-
-
-    @Test
-    fun testUpdateCollections_deletesCollection() {
-        val localCollection = mockk<LocalTestCollection>()
-        every { localCollection.collectionUrl } returns "http://delete.the/collection"
-        every { localCollection.deleteCollection() } returns true
-        every { localCollection.title } returns "Collection to be deleted locally"
-
-        // Should delete the localCollection if dbCollection (remote) does not exist
-        val localCollections = mutableListOf(localCollection)
-        val result = syncer.updateCollections(mockk(), localCollections, emptyMap())
-        verify(exactly = 1) { localCollection.deleteCollection() }
-
-        // Updated local collection list should be empty
-        assertTrue(result.isEmpty())
-    }
-
-    @Test
-    fun testUpdateCollections_updatesCollection() {
-        val localCollection = mockk<LocalTestCollection>()
-        val dbCollection = mockk<Collection>()
-        val dbCollections = mapOf("http://update.the/collection".toHttpUrl() to dbCollection)
-        every { dbCollection.url } returns "http://update.the/collection".toHttpUrl()
-        every { localCollection.collectionUrl } returns "http://update.the/collection"
-        every { localCollection.title } returns "The Local Collection"
-
-        // Should update the localCollection if it exists
-        val result = syncer.updateCollections(mockk(), listOf(localCollection), dbCollections)
-        verify(exactly = 1) { syncer.update(localCollection, dbCollection) }
-
-        // Updated local collection list should be same as input
-        assertArrayEquals(arrayOf(localCollection), result.toTypedArray())
-    }
-
-    @Test
-    fun testUpdateCollections_findsNewCollection() {
-        val dbCollection = mockk<Collection>()
-        every { dbCollection.url } returns "http://newly.found/collection".toHttpUrl()
-        val dbCollections = mapOf(dbCollection.url to dbCollection)
-
-        // Should return the new collection, because it was not updated
-        val result = syncer.updateCollections(mockk(), emptyList(), dbCollections)
-
-        // Updated local collection list contain new entry
-        assertEquals(1, result.size)
-        assertEquals(dbCollection.url.toString(), result[0].collectionUrl)
-    }
-
-
-    @Test
-    fun testCreateLocalCollections() {
-        val provider = mockk<ContentProviderClient>()
-        val localCollection = mockk<LocalTestCollection>()
-        val dbCollection = mockk<Collection>()
-        every { syncer.create(provider, dbCollection) } returns localCollection
-        every { dbCollection.url } returns "http://newly.found/collection".toHttpUrl()
-
-        // Should return list of newly created local collections
-        val result = syncer.createLocalCollections(provider, listOf(dbCollection))
-        assertEquals(listOf(localCollection), result)
-    }
-
-    
-    @Test
-    fun testSyncCollectionContents() {
-        val provider = mockk<ContentProviderClient>()
-        val dbCollection1 = mockk<Collection>()
-        val dbCollection2 = mockk<Collection>()
-        val dbCollections = mapOf(
-            "http://newly.found/collection1".toHttpUrl() to dbCollection1,
-            "http://newly.found/collection2".toHttpUrl() to dbCollection2
-        )
-        val localCollection1 = mockk<LocalTestCollection>()
-        val localCollection2 = mockk<LocalTestCollection>()
-        val localCollections = listOf(localCollection1, localCollection2)
-        every { localCollection1.collectionUrl } returns "http://newly.found/collection1"
-        every { localCollection2.collectionUrl } returns "http://newly.found/collection2"
-
-        // Should call the collection content sync on both collections
-        syncer.syncCollectionContents(provider, localCollections, dbCollections)
-        verify(exactly = 1) { syncer.syncCollection(provider, localCollection1, dbCollection1) }
-        verify(exactly = 1) { syncer.syncCollection(provider, localCollection2, dbCollection2) }
-    }
-    
-
-    // Test helpers
-
-    class TestSyncer @AssistedInject constructor(
-        @Assisted account: Account,
-        @Assisted extras: Array<String>,
-        @Assisted syncResult: SyncResult
-    ) : Syncer<LocalTestCollection>(account, extras, syncResult) {
-
-        @AssistedFactory
-        interface Factory {
-            fun create(account: Account, extras: Array<String>, syncResult: SyncResult): TestSyncer
-        }
-
-        override val authority: String
-            get() = ""
-        override val serviceType: String
-            get() = ""
-
-        override fun prepare(provider: ContentProviderClient): Boolean =
-            true
-
-        override fun getLocalCollections(provider: ContentProviderClient): List<LocalTestCollection> =
-            emptyList()
-
-        override fun getDbSyncCollections(serviceId: Long): List<Collection> =
-            emptyList()
-
-        override fun create(provider: ContentProviderClient, remoteCollection: Collection): LocalTestCollection =
-            LocalTestCollection(remoteCollection.url.toString())
-
-        override fun syncCollection(
-            provider: ContentProviderClient,
-            localCollection: LocalTestCollection,
-            remoteCollection: Collection
-        ) {}
-
-        override fun update(localCollection: LocalTestCollection, remoteCollection: Collection) {}
-
-    }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/sync/account/AccountsCleanupWorkerTest.kt

@@ -1,152 +0,0 @@
-package at.bitfire.davdroid.sync.account
-
-import android.accounts.Account
-import android.accounts.AccountManager
-import android.content.Context
-import android.os.Bundle
-import android.util.Log
-import androidx.hilt.work.HiltWorkerFactory
-import androidx.work.Configuration
-import androidx.work.WorkerFactory
-import androidx.work.WorkerParameters
-import androidx.work.testing.TestListenableWorkerBuilder
-import androidx.work.testing.WorkManagerTestInitHelper
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.db.AppDatabase
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.Service
-import at.bitfire.davdroid.resource.LocalAddressBook.Companion.USER_DATA_COLLECTION_ID
-import at.bitfire.davdroid.settings.SettingsManager
-import dagger.hilt.android.qualifiers.ApplicationContext
-import dagger.hilt.android.testing.HiltAndroidRule
-import dagger.hilt.android.testing.HiltAndroidTest
-import okhttp3.HttpUrl.Companion.toHttpUrl
-import org.junit.After
-import org.junit.Assert.assertEquals
-import org.junit.Assert.assertTrue
-import org.junit.Before
-import org.junit.Rule
-import org.junit.Test
-import javax.inject.Inject
-
-@HiltAndroidTest
-class AccountsCleanupWorkerTest {
-
-    @get:Rule
-    val hiltRule = HiltAndroidRule(this)
-
-    @Inject
-    lateinit var accountsCleanupWorkerFactory: AccountsCleanupWorker.Factory
-
-    @Inject
-    @ApplicationContext
-    lateinit var context: Context
-
-    @Inject
-    lateinit var db: AppDatabase
-
-    @Inject
-    lateinit var settingsManager: SettingsManager
-
-    @Inject
-    lateinit var workerFactory: HiltWorkerFactory
-
-    lateinit var accountManager: AccountManager
-    lateinit var addressBookAccountType: String
-    lateinit var addressBookAccount: Account
-    lateinit var service: Service
-
-    @Before
-    fun setUp() {
-        hiltRule.inject()
-
-        service = createTestService(Service.TYPE_CARDDAV)
-
-        // Prepare test account
-        accountManager = AccountManager.get(context)
-        addressBookAccountType = context.getString(R.string.account_type_address_book)
-        addressBookAccount = Account(
-            "Fancy address book account",
-            addressBookAccountType
-        )
-
-        // Initialize WorkManager for instrumentation tests.
-        val config = Configuration.Builder()
-            .setMinimumLoggingLevel(Log.DEBUG)
-            .setWorkerFactory(workerFactory)
-            .build()
-        WorkManagerTestInitHelper.initializeTestWorkManager(context, config)
-    }
-
-    @After
-    fun tearDown() {
-        // Remove the account here in any case; Nice to have when the test fails
-        accountManager.removeAccountExplicitly(addressBookAccount)
-    }
-
-
-    @Test
-    fun testDeleteOrphanedAddressBookAccounts_deletesAddressBookAccountWithoutCollection() {
-        // Create address book account without corresponding collection
-        assertTrue(accountManager.addAccountExplicitly(addressBookAccount, null, null))
-
-        val addressBookAccounts = accountManager.getAccountsByType(addressBookAccountType)
-        assertEquals(addressBookAccount, addressBookAccounts.firstOrNull())
-
-        // Create worker and run the method
-        val worker = TestListenableWorkerBuilder<AccountsCleanupWorker>(context)
-            .setWorkerFactory(object: WorkerFactory() {
-                override fun createWorker(appContext: Context, workerClassName: String, workerParameters: WorkerParameters) =
-                    accountsCleanupWorkerFactory.create(appContext, workerParameters)
-            })
-            .build()
-        worker.deleteOrphanedAddressBookAccounts(addressBookAccounts)
-
-        // Verify account was deleted
-        assertTrue(accountManager.getAccountsByType(addressBookAccountType).isEmpty())
-    }
-
-    @Test
-    fun testDeleteOrphanedAddressBookAccounts_leavesAddressBookAccountWithCollection() {
-        // Create address book account _with_ corresponding collection and verify
-        val randomCollectionId = 12345L
-        val userData = Bundle(1).apply {
-            putString(USER_DATA_COLLECTION_ID, "$randomCollectionId")
-        }
-        assertTrue(accountManager.addAccountExplicitly(addressBookAccount, null, userData))
-
-        val addressBookAccounts = accountManager.getAccountsByType(addressBookAccountType)
-        assertEquals(randomCollectionId, accountManager.getUserData(addressBookAccount, USER_DATA_COLLECTION_ID).toLong())
-
-        // Create the collection
-        val collectionDao = db.collectionDao()
-        collectionDao.insert(Collection(
-            randomCollectionId,
-            serviceId = service.id,
-            type = Collection.TYPE_ADDRESSBOOK,
-            url = "http://www.example.com/yay.php".toHttpUrl()
-        ))
-
-        // Create worker and run the method
-        val worker = TestListenableWorkerBuilder<AccountsCleanupWorker>(context)
-            .setWorkerFactory(object: WorkerFactory() {
-                override fun createWorker(appContext: Context, workerClassName: String, workerParameters: WorkerParameters) =
-                    accountsCleanupWorkerFactory.create(appContext, workerParameters)
-            })
-            .build()
-        worker.deleteOrphanedAddressBookAccounts(addressBookAccounts)
-
-        // Verify account was _not_ deleted
-        assertEquals(addressBookAccount, addressBookAccounts.firstOrNull())
-    }
-
-
-    // helpers
-
-    private fun createTestService(serviceType: String): Service {
-        val service = Service(id=0, accountName="test", type=serviceType, principal = null)
-        val serviceId = db.serviceDao().insertOrReplace(service)
-        return db.serviceDao().get(serviceId)!!
-    }
-
-}

app/src/androidTest/kotlin/at/bitfire/davdroid/sync/account/TestAccountAuthenticator.kt

@@ -1,96 +0,0 @@
-/***************************************************************************************************
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- **************************************************************************************************/
-package at.bitfire.davdroid.sync.account
-
-import android.accounts.AbstractAccountAuthenticator
-import android.accounts.Account
-import android.accounts.AccountAuthenticatorResponse
-import android.accounts.AccountManager
-import android.app.Service
-import android.content.Context
-import android.content.Intent
-import android.os.Bundle
-import androidx.test.platform.app.InstrumentationRegistry
-import at.bitfire.davdroid.settings.AccountSettings
-import at.bitfire.davdroid.test.R
-import org.junit.Assert.assertTrue
-
-/**
- * Handles the test account type, which has no sync adapters and side effects that run unintentionally.
- *
- * Usually used like this:
- *
- * ```
- * lateinit var account: Account
- *
- * @Before
- * fun setUp() {
- *     account = TestAccountAuthenticator.create()
- *
- *     // You can now use the test account.
- * }
- *
- * @After
- * fun tearDown() {
- *    TestAccountAuthenticator.remove(account)
- * }
- * ```
- */
-class TestAccountAuthenticator: Service() {
-
-    companion object {
-
-        val context by lazy { InstrumentationRegistry.getInstrumentation().context }
-
-        /**
-         * Creates a test account, usually in the `Before` setUp of a test.
-         *
-         * Remove it with [remove].
-         */
-        fun create(): Account {
-            val accountType = context.getString(R.string.account_type_test)
-            val account = Account("Test Account", accountType)
-
-            assertTrue(SystemAccountUtils.createAccount(context, account, AccountSettings.initialUserData(null)))
-
-            return account
-        }
-
-        /**
-         * Removes a test account, usually in the `@After` tearDown of a test.
-         */
-        fun remove(account: Account) {
-            val am = AccountManager.get(context)
-            am.removeAccountExplicitly(account)
-        }
-
-    }
-
-
-    private lateinit var accountAuthenticator: AccountAuthenticator
-
-
-    override fun onCreate() {
-        accountAuthenticator = AccountAuthenticator(this)
-    }
-
-    override fun onBind(intent: Intent?) =
-            accountAuthenticator.iBinder.takeIf { intent?.action == AccountManager.ACTION_AUTHENTICATOR_INTENT }
-
-
-    private class AccountAuthenticator(
-        val context: Context
-    ): AbstractAccountAuthenticator(context) {
-
-        override fun addAccount(response: AccountAuthenticatorResponse?, accountType: String?, authTokenType: String?, requiredFeatures: Array<String>?, options: Bundle?) = null
-        override fun editProperties(response: AccountAuthenticatorResponse?, accountType: String?) = null
-        override fun getAuthTokenLabel(p0: String?) = null
-        override fun confirmCredentials(p0: AccountAuthenticatorResponse?, p1: Account?, p2: Bundle?) = null
-        override fun updateCredentials(p0: AccountAuthenticatorResponse?, p1: Account?, p2: String?, p3: Bundle?) = null
-        override fun getAuthToken(p0: AccountAuthenticatorResponse?, p1: Account?, p2: String?, p3: Bundle?) = null
-        override fun hasFeatures(p0: AccountAuthenticatorResponse?, p1: Account?, p2: Array<out String>?) = null
-
-    }
-
-}

app/src/androidTest/res/values/strings.xml

@@ -1,15 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-  ~ Copyright (c) Ricki Hirner (bitfire web engineering).
-  ~ All rights reserved. This program and the accompanying materials
-  ~ are made available under the terms of the GNU Public License v3.0
-  ~ which accompanies this distribution, and is available at
-  ~ http://www.gnu.org/licenses/gpl.html
-  -->
-
-<resources>
-
-    <string name="app_name">Davx5Test</string>
-    <string name="account_type_test">at.bitfire.davdroid.test</string>
-
-</resources>

app/src/androidTest/res/xml/test_account_authenticator.xml

@@ -1,5 +0,0 @@
-<account-authenticator xmlns:android="http://schemas.android.com/apk/res/android"
-    android:accountType="@string/account_type_test"
-    android:icon="@android:drawable/star_on"
-    android:smallIcon="@android:drawable/star_on"
-    android:label="Test Account" />

app/src/main/assets/translators.json

@@ -1 +0,0 @@
-{"ar_SA":["abdunnasir"],"bg":["dpa_transifex"],"ca":["Kintu","jordibrus","zagur"],"cs":["pavelb","svetlemodry","tomas.odehnal"],"da":["Tntdruid_","knutztar","mjjzf","twikedk"],"de":["Atalanttore","TheName","Wyrrrd","YvanM","amandablue","anestiskaci","corppneq","crit12","hammaschlach","maxkl","nicolas_git","owncube"],"el":["KristinaQejvanaj","anestiskaci","diamond_gr"],"es":["Ark74","Elhea","GranPC","aluaces","jcvielma","plaguna","polkhas","xphnx"],"eu":["Osoitz","Thadah","cockeredradiation"],"fa":["Numb","ahangarha","amiraliakbari","joojoojoo","maryambehzi","mtashackori","taranehsaei"],"fr":["AlainR","Amadeen","Floflr","JorisBodin","Llorc","LoiX07","Novick","Poussinou","Thecross","YvanM","alkino2","boutil","callmemagnus","chrcha","grenatrad","jokx","mathieugfortin","paullbn","vincen","ÉricB."],"fr_FR":["Llorc","Poussinou","chrcha"],"gl":["aluaces","pikamoku"],"hu":["Roshek","infeeeee","jtg"],"it":["Damtux","FranzMari","ed0","malaerba","noccio","nwandy","rickyroo","technezio"],"it_IT":["malaerba"],"ja":["Naofumi","yanorei32"],"nb_NO":["elonus"],"nl":["XtremeNova","davtemp","dehart","erikhubers","frankyboy1963"],"pl":["TORminator","TheName","Valdnet","gsz","mg6","oskarjakiela"],"pt":["amalvarenga","wanderlei.huttel"],"pt_BR":["wanderlei.huttel"],"ru":["aigoshin","anm","ashed","astalavister","nick.savin","vaddd"],"sk_SK":["brango67","tiborepcek"],"sl_SI":["MrLaaky","uroszor"],"sr":["daimonion"],"sv":["Mikaelb","campbelldavid"],"szl":["chlodny"],"tr_TR":["ooguz","pultars"],"uk":["androsua","olexn","twixi007"],"uk_UA":["astalavister"],"zh_CN":["anolir","jxj2zzz79pfp9bpo","linuxbckp","mofitt2016","oksjd","phy","spice2wolf"],"zh_TW":["linuxbckp","mofitt2016","phy","waiabsfabuloushk"]}

app/src/main/kotlin/at/bitfire/davdroid/Constants.kt

@@ -1,53 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-package at.bitfire.davdroid
-
-import android.net.Uri
-import androidx.core.net.toUri
-
-/**
- * Brand-specific constants like (non-theme) colors, homepage URLs etc.
- */
-object Constants {
-
-    const val DAVDROID_GREEN_RGBA = 0xFF8bc34a.toInt()
-
-    val HOMEPAGE_URL = "https://www.davx5.com".toUri()
-    const val HOMEPAGE_PATH_FAQ = "faq"
-    const val HOMEPAGE_PATH_FAQ_SYNC_NOT_RUN = "synchronization-is-not-run-as-expected"
-    const val HOMEPAGE_PATH_FAQ_LOCATION_PERMISSION = "wifi-ssid-restriction-location-permission"
-    const val HOMEPAGE_PATH_OPEN_SOURCE = "donate"
-    const val HOMEPAGE_PATH_PRIVACY = "privacy"
-    const val HOMEPAGE_PATH_TESTED_SERVICES = "tested-with"
-
-    val MANUAL_URL = "https://manual.davx5.com".toUri()
-    const val MANUAL_PATH_ACCOUNTS_COLLECTIONS = "accounts_collections.html"
-    const val MANUAL_FRAGMENT_SERVICE_DISCOVERY = "how-does-service-discovery-work"
-    const val MANUAL_PATH_SETTINGS = "settings.html"
-    const val MANUAL_FRAGMENT_APP_SETTINGS = "app-wide-settings"
-    const val MANUAL_FRAGMENT_ACCOUNT_SETTINGS = "account-settings"
-    const val MANUAL_PATH_WEBDAV_MOUNTS = "webdav_mounts.html"
-
-    val COMMUNITY_URL = "https://github.com/bitfireAT/davx5-ose/discussions".toUri()
-
-    val FEDIVERSE_HANDLE = "@davx5app@fosstodon.org"
-    val FEDIVERSE_URL = "https://fosstodon.org/@davx5app".toUri()
-
-    /**
-     * Appends query parameters for anonymized usage statistics (app ID, version).
-     * Can be used by the called Website to get an idea of which versions etc. are currently used.
-     *
-     * @param context   optional info about from where the URL was opened (like a specific Activity)
-     */
-    fun Uri.Builder.withStatParams(context: String? = null): Uri.Builder {
-        appendQueryParameter("pk_campaign", BuildConfig.APPLICATION_ID)
-        appendQueryParameter("app-version", BuildConfig.VERSION_NAME)
-
-        if (context != null)
-            appendQueryParameter("pk_kwd", context)
-
-        return this
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/db/AppDatabase.kt

@@ -1,307 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.db
-
-import android.accounts.AccountManager
-import android.app.PendingIntent
-import android.content.Context
-import android.content.Intent
-import android.database.sqlite.SQLiteQueryBuilder
-import androidx.core.app.NotificationCompat
-import androidx.core.database.getStringOrNull
-import androidx.room.AutoMigration
-import androidx.room.Database
-import androidx.room.DeleteColumn
-import androidx.room.ProvidedAutoMigrationSpec
-import androidx.room.Room
-import androidx.room.RoomDatabase
-import androidx.room.TypeConverters
-import androidx.room.migration.AutoMigrationSpec
-import androidx.room.migration.Migration
-import androidx.sqlite.db.SupportSQLiteDatabase
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.TextTable
-import at.bitfire.davdroid.servicedetection.RefreshCollectionsWorker
-import at.bitfire.davdroid.ui.AccountsActivity
-import at.bitfire.davdroid.ui.NotificationRegistry
-import dagger.Module
-import dagger.Provides
-import dagger.hilt.InstallIn
-import dagger.hilt.android.qualifiers.ApplicationContext
-import dagger.hilt.components.SingletonComponent
-import java.io.Writer
-import java.util.logging.Logger
-import javax.inject.Singleton
-
-@Suppress("ClassName")
-@Database(entities = [
-    Service::class,
-    HomeSet::class,
-    Collection::class,
-    Principal::class,
-    SyncStats::class,
-    WebDavDocument::class,
-    WebDavMount::class
-], exportSchema = true, version = 14, autoMigrations = [
-    AutoMigration(from = 9, to = 10),
-    AutoMigration(from = 10, to = 11),
-    AutoMigration(from = 11, to = 12, spec = AppDatabase.AutoMigration11_12::class),
-    AutoMigration(from = 12, to = 13),
-    AutoMigration(from = 13, to = 14)
-])
-@TypeConverters(Converters::class)
-abstract class AppDatabase: RoomDatabase() {
-
-    @Module
-    @InstallIn(SingletonComponent::class)
-    object AppDatabaseModule {
-        @Provides
-        @Singleton
-        fun appDatabase(
-            @ApplicationContext context: Context,
-            notificationRegistry: NotificationRegistry
-        ): AppDatabase =
-            Room.databaseBuilder(context.applicationContext, AppDatabase::class.java, "services.db")
-                .addMigrations(*migrations)
-                .addAutoMigrationSpec(AutoMigration11_12(context))
-                .fallbackToDestructiveMigration()   // as a last fallback, recreate database instead of crashing
-                .addCallback(object: Callback() {
-                    override fun onDestructiveMigration(db: SupportSQLiteDatabase) {
-                        notificationRegistry.notifyIfPossible(NotificationRegistry.NOTIFY_DATABASE_CORRUPTED) {
-                            val launcherIntent = Intent(context, AccountsActivity::class.java)
-                            NotificationCompat.Builder(context, notificationRegistry.CHANNEL_GENERAL)
-                                .setSmallIcon(R.drawable.ic_warning_notify)
-                                .setContentTitle(context.getString(R.string.database_destructive_migration_title))
-                                .setContentText(context.getString(R.string.database_destructive_migration_text))
-                                .setCategory(NotificationCompat.CATEGORY_ERROR)
-                                .setContentIntent(PendingIntent.getActivity(context, 0, launcherIntent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE))
-                                .setAutoCancel(true)
-                                .build()
-                        }
-
-                        // remove all accounts because they're unfortunately useless without database
-                        val am = AccountManager.get(context)
-                        for (account in am.getAccountsByType(context.getString(R.string.account_type)))
-                            am.removeAccountExplicitly(account)
-                    }
-                })
-                .build()
-    }
-
-    // auto migrations
-
-    @ProvidedAutoMigrationSpec
-    @DeleteColumn(tableName = "collection", columnName = "owner")
-    class AutoMigration11_12(val context: Context): AutoMigrationSpec {
-        override fun onPostMigrate(db: SupportSQLiteDatabase) {
-            Logger.getGlobal().info("Database update to v12, refreshing services to get display names of owners")
-            db.query("SELECT id FROM service", arrayOf()).use { cursor ->
-                while (cursor.moveToNext()) {
-                    val serviceId = cursor.getLong(0)
-                    RefreshCollectionsWorker.enqueue(context, serviceId)
-                }
-            }
-        }
-    }
-
-
-    companion object {
-
-        // manual migrations
-
-        val migrations: Array<Migration> = arrayOf(
-            object : Migration(8, 9) {
-                override fun migrate(db: SupportSQLiteDatabase) {
-                    db.execSQL("CREATE TABLE syncstats (" +
-                            "id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT," +
-                            "collectionId INTEGER NOT NULL REFERENCES collection(id) ON DELETE CASCADE," +
-                            "authority TEXT NOT NULL," +
-                            "lastSync INTEGER NOT NULL)")
-                    db.execSQL("CREATE UNIQUE INDEX index_syncstats_collectionId_authority ON syncstats(collectionId, authority)")
-
-                    db.execSQL("CREATE INDEX index_collection_url ON collection(url)")
-                }
-            },
-
-            object : Migration(7, 8) {
-                override fun migrate(db: SupportSQLiteDatabase) {
-                    db.execSQL("ALTER TABLE homeset ADD COLUMN personal INTEGER NOT NULL DEFAULT 1")
-                    db.execSQL("ALTER TABLE collection ADD COLUMN homeSetId INTEGER DEFAULT NULL REFERENCES homeset(id) ON DELETE SET NULL")
-                    db.execSQL("ALTER TABLE collection ADD COLUMN owner TEXT DEFAULT NULL")
-                    db.execSQL("CREATE INDEX index_collection_homeSetId_type ON collection(homeSetId, type)")
-                }
-            },
-
-            object : Migration(6, 7) {
-                override fun migrate(db: SupportSQLiteDatabase) {
-                    db.execSQL("ALTER TABLE homeset ADD COLUMN privBind INTEGER NOT NULL DEFAULT 1")
-                    db.execSQL("ALTER TABLE homeset ADD COLUMN displayName TEXT DEFAULT NULL")
-                }
-            },
-
-            object : Migration(5, 6) {
-                override fun migrate(db: SupportSQLiteDatabase) {
-                    val sql = arrayOf(
-                        // migrate "services" to "service": rename columns, make id NOT NULL
-                        "CREATE TABLE service(" +
-                                "id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT," +
-                                "accountName TEXT NOT NULL," +
-                                "type TEXT NOT NULL," +
-                                "principal TEXT DEFAULT NULL" +
-                                ")",
-                        "CREATE UNIQUE INDEX index_service_accountName_type ON service(accountName, type)",
-                        "INSERT INTO service(id, accountName, type, principal) SELECT _id, accountName, service, principal FROM services",
-                        "DROP TABLE services",
-
-                        // migrate "homesets" to "homeset": rename columns, make id NOT NULL
-                        "CREATE TABLE homeset(" +
-                                "id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT," +
-                                "serviceId INTEGER NOT NULL," +
-                                "url TEXT NOT NULL," +
-                                "FOREIGN KEY (serviceId) REFERENCES service(id) ON DELETE CASCADE" +
-                                ")",
-                        "CREATE UNIQUE INDEX index_homeset_serviceId_url ON homeset(serviceId, url)",
-                        "INSERT INTO homeset(id, serviceId, url) SELECT _id, serviceID, url FROM homesets",
-                        "DROP TABLE homesets",
-
-                        // migrate "collections" to "collection": rename columns, make id NOT NULL
-                        "CREATE TABLE collection(" +
-                                "id INTEGER NOT NULL PRIMARY KEY AUTOINCREMENT," +
-                                "serviceId INTEGER NOT NULL," +
-                                "type TEXT NOT NULL," +
-                                "url TEXT NOT NULL," +
-                                "privWriteContent INTEGER NOT NULL DEFAULT 1," +
-                                "privUnbind INTEGER NOT NULL DEFAULT 1," +
-                                "forceReadOnly INTEGER NOT NULL DEFAULT 0," +
-                                "displayName TEXT DEFAULT NULL," +
-                                "description TEXT DEFAULT NULL," +
-                                "color INTEGER DEFAULT NULL," +
-                                "timezone TEXT DEFAULT NULL," +
-                                "supportsVEVENT INTEGER DEFAULT NULL," +
-                                "supportsVTODO INTEGER DEFAULT NULL," +
-                                "supportsVJOURNAL INTEGER DEFAULT NULL," +
-                                "source TEXT DEFAULT NULL," +
-                                "sync INTEGER NOT NULL DEFAULT 0," +
-                                "FOREIGN KEY (serviceId) REFERENCES service(id) ON DELETE CASCADE" +
-                                ")",
-                        "CREATE INDEX index_collection_serviceId_type ON collection(serviceId,type)",
-                        "INSERT INTO collection(id, serviceId, type, url, privWriteContent, privUnbind, forceReadOnly, displayName, description, color, timezone, supportsVEVENT, supportsVTODO, source, sync) " +
-                                "SELECT _id, serviceID, type, url, privWriteContent, privUnbind, forceReadOnly, displayName, description, color, timezone, supportsVEVENT, supportsVTODO, source, sync FROM collections",
-                        "DROP TABLE collections"
-                    )
-                    sql.forEach { db.execSQL(it) }
-                }
-            },
-
-            object : Migration(4, 5) {
-                override fun migrate(db: SupportSQLiteDatabase) {
-                    db.execSQL("ALTER TABLE collections ADD COLUMN privWriteContent INTEGER DEFAULT 0 NOT NULL")
-                    db.execSQL("UPDATE collections SET privWriteContent=NOT readOnly")
-
-                    db.execSQL("ALTER TABLE collections ADD COLUMN privUnbind INTEGER DEFAULT 0 NOT NULL")
-                    db.execSQL("UPDATE collections SET privUnbind=NOT readOnly")
-
-                    // there's no DROP COLUMN in SQLite, so just keep the "readOnly" column
-                }
-            },
-
-            object : Migration(3, 4) {
-                override fun migrate(db: SupportSQLiteDatabase) {
-                    db.execSQL("ALTER TABLE collections ADD COLUMN forceReadOnly INTEGER DEFAULT 0 NOT NULL")
-                }
-            },
-
-            object : Migration(2, 3) {
-                override fun migrate(db: SupportSQLiteDatabase) {
-                    // We don't have access to the context in a Room migration now, so
-                    // we will just drop those settings from old DAVx5 versions.
-                    Logger.getGlobal().warning("Dropping settings distrustSystemCerts and overrideProxy*")
-
-                    /*val edit = PreferenceManager.getDefaultSharedPreferences(context).edit()
-                    try {
-                        db.query("settings", arrayOf("setting", "value"), null, null, null, null, null).use { cursor ->
-                            while (cursor.moveToNext()) {
-                                when (cursor.getString(0)) {
-                                    "distrustSystemCerts" -> edit.putBoolean(App.DISTRUST_SYSTEM_CERTIFICATES, cursor.getInt(1) != 0)
-                                    "overrideProxy" -> edit.putBoolean(App.OVERRIDE_PROXY, cursor.getInt(1) != 0)
-                                    "overrideProxyHost" -> edit.putString(App.OVERRIDE_PROXY_HOST, cursor.getString(1))
-                                    "overrideProxyPort" -> edit.putInt(App.OVERRIDE_PROXY_PORT, cursor.getInt(1))
-
-                                    StartupDialogFragment.HINT_GOOGLE_PLAY_ACCOUNTS_REMOVED ->
-                                        edit.putBoolean(StartupDialogFragment.HINT_GOOGLE_PLAY_ACCOUNTS_REMOVED, cursor.getInt(1) != 0)
-                                    StartupDialogFragment.HINT_OPENTASKS_NOT_INSTALLED ->
-                                        edit.putBoolean(StartupDialogFragment.HINT_OPENTASKS_NOT_INSTALLED, cursor.getInt(1) != 0)
-                                }
-                            }
-                        }
-                        db.execSQL("DROP TABLE settings")
-                    } finally {
-                        edit.apply()
-                    }*/
-                }
-            },
-
-            object : Migration(1, 2) {
-                override fun migrate(db: SupportSQLiteDatabase) {
-                    db.execSQL("ALTER TABLE collections ADD COLUMN type TEXT NOT NULL DEFAULT ''")
-                    db.execSQL("ALTER TABLE collections ADD COLUMN source TEXT DEFAULT NULL")
-                    db.execSQL("UPDATE collections SET type=(" +
-                            "SELECT CASE service WHEN ? THEN ? ELSE ? END " +
-                            "FROM services WHERE _id=collections.serviceID" +
-                            ")",
-                            arrayOf("caldav", "CALENDAR", "ADDRESS_BOOK"))
-                }
-            }
-        )
-
-    }
-
-
-    // DAOs
-
-    abstract fun serviceDao(): ServiceDao
-    abstract fun homeSetDao(): HomeSetDao
-    abstract fun collectionDao(): CollectionDao
-    abstract fun principalDao(): PrincipalDao
-    abstract fun syncStatsDao(): SyncStatsDao
-    abstract fun webDavDocumentDao(): WebDavDocumentDao
-    abstract fun webDavMountDao(): WebDavMountDao
-
-
-    // helpers
-
-    fun dump(writer: Writer, ignoreTables: Array<String>) {
-        val db = openHelper.readableDatabase
-        db.beginTransactionNonExclusive()
-
-        // iterate through all tables
-        db.query(SQLiteQueryBuilder.buildQueryString(false, "sqlite_master", arrayOf("name"), "type='table'", null, null, null, null)).use { cursorTables ->
-            while (cursorTables.moveToNext()) {
-                val tableName = cursorTables.getString(0)
-                if (ignoreTables.contains(tableName)) {
-                    writer.append("$tableName: ")
-                    db.query("SELECT COUNT(*) FROM $tableName").use { cursor ->
-                        if (cursor.moveToNext())
-                            writer.append("${cursor.getInt(0)} row(s), data not listed here\n\n")
-                    }
-                } else {
-                    writer.append("$tableName\n")
-                    db.query("SELECT * FROM $tableName").use { cursor ->
-                        val table = TextTable(*cursor.columnNames)
-                        val cols = cursor.columnCount
-                        // print rows
-                        while (cursor.moveToNext()) {
-                            val values = Array(cols) { idx -> cursor.getStringOrNull(idx) }
-                            table.addLine(*values)
-                        }
-                        writer.append(table.toString())
-                    }
-                }
-            }
-            db.endTransaction()
-        }
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/log/LogcatHandler.kt

@@ -1,52 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.log
-
-import android.os.Build
-import android.util.Log
-import at.bitfire.davdroid.BuildConfig
-import com.google.common.base.Ascii
-import java.util.logging.Handler
-import java.util.logging.Level
-import java.util.logging.LogRecord
-
-/**
- * Logging handler that logs to Android logcat.
- */
-internal class LogcatHandler: Handler() {
-
-    init {
-        formatter = PlainTextFormatter.LOGCAT
-    }
-
-    override fun publish(r: LogRecord) {
-        val level = r.level.intValue()
-        val text = formatter.format(r)
-
-        // get class name that calls the logger (or fall back to package name)
-        val className = if (r.sourceClassName != null)
-            PlainTextFormatter.shortClassName(r.sourceClassName)
-        else
-            BuildConfig.APPLICATION_ID
-
-        // truncate class name to 23 characters on Android <8, see Log documentation
-        val tag = if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O)
-            Ascii.truncate(className, 23, "")
-        else
-            className
-
-        when {
-            level >= Level.SEVERE.intValue()  -> Log.e(tag, text, r.thrown)
-            level >= Level.WARNING.intValue() -> Log.w(tag, text, r.thrown)
-            level >= Level.CONFIG.intValue()  -> Log.i(tag, text, r.thrown)
-            level >= Level.FINER.intValue()   -> Log.d(tag, text, r.thrown)
-            else                              -> Log.v(tag, text, r.thrown)
-        }
-    }
-
-    override fun flush() {}
-    override fun close() {}
-
-}

app/src/main/kotlin/at/bitfire/davdroid/log/PlainTextFormatter.kt

@@ -1,111 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.log
-
-import com.google.common.base.Ascii
-import java.io.PrintWriter
-import java.io.StringWriter
-import java.text.SimpleDateFormat
-import java.util.Date
-import java.util.Locale
-import java.util.logging.Formatter
-import java.util.logging.LogRecord
-
-class PlainTextFormatter(
-    private val withTime: Boolean,
-    private val withSource: Boolean,
-    private val padSource: Int = 30,
-    private val withException: Boolean,
-    private val lineSeparator: String?
-): Formatter() {
-
-    companion object {
-
-        /**
-         * Formatter intended for logcat output.
-         */
-        val LOGCAT = PlainTextFormatter(
-            withTime = false,
-            withSource = false,
-            withException = false,
-            lineSeparator = null
-        )
-
-        /**
-         * Formatter intended for file output.
-         */
-        val DEFAULT = PlainTextFormatter(
-            withTime = true,
-            withSource = true,
-            withException = true,
-            lineSeparator = System.lineSeparator()
-        )
-
-        /**
-         * Maximum length of a log line (estimate).
-         */
-        const val MAX_LENGTH = 10000
-
-        fun shortClassName(className: String) = className
-            .replace(Regex("^at\\.bitfire\\.(dav|cert4an|dav4an|ical4an|vcard4an)droid\\."), ".")
-            .replace(Regex("\\$.*$"), "")
-
-        private fun stackTrace(ex: Throwable): String {
-            val writer = StringWriter()
-            ex.printStackTrace(PrintWriter(writer))
-            return writer.toString()
-        }
-
-    }
-
-    private val timeFormat = SimpleDateFormat("yyyy-MM-dd HH:mm:ss", Locale.ROOT)
-
-
-    override fun format(r: LogRecord): String {
-        val builder = StringBuilder()
-
-        if (withTime)
-            builder .append(timeFormat.format(Date(r.millis)))
-                    .append(" ").append(r.threadID).append(" ")
-
-        if (withSource && r.sourceClassName != null) {
-            val className = shortClassName(r.sourceClassName)
-            if (className != r.loggerName) {
-                val classNameColumn = "[$className] ".padEnd(padSource)
-                builder.append(classNameColumn)
-            }
-        }
-
-        builder.append(truncate(r.message))
-
-        if (withException && r.thrown != null) {
-            val indentedStackTrace = stackTrace(r.thrown)
-                .replace("\n", "\n\t")
-                .removeSuffix("\t")
-            builder.append("\n\tEXCEPTION ").append(indentedStackTrace)
-        }
-
-        r.parameters?.let {
-            for ((idx, param) in it.withIndex()) {
-                builder.append("\n\tPARAMETER #").append(idx + 1).append(" = ")
-
-                val valStr = if (param == null)
-                    "(null)"
-                else
-                    truncate(param.toString())
-                builder.append(valStr)
-            }
-        }
-
-        if (lineSeparator != null)
-            builder.append(lineSeparator)
-
-        return builder.toString()
-    }
-
-    private fun truncate(s: String) =
-        Ascii.truncate(s, MAX_LENGTH, "[…]")
-
-}

app/src/main/kotlin/at/bitfire/davdroid/network/BearerAuthInterceptor.kt

@@ -1,72 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.network
-
-import kotlinx.coroutines.CancellationException
-import kotlinx.coroutines.CompletableDeferred
-import kotlinx.coroutines.runBlocking
-import net.openid.appauth.AuthState
-import net.openid.appauth.AuthorizationException
-import net.openid.appauth.AuthorizationService
-import okhttp3.Interceptor
-import okhttp3.Response
-import java.util.logging.Level
-import java.util.logging.Logger
-
-/**
- * Sends an OAuth Bearer token authorization as described in RFC 6750.
- */
-class BearerAuthInterceptor(
-    private val accessToken: String
-): Interceptor {
-
-    companion object {
-
-        val logger: Logger
-            get() = Logger.getGlobal()
-
-        fun fromAuthState(authService: AuthorizationService, authState: AuthState, callback: AuthStateUpdateCallback? = null): BearerAuthInterceptor? {
-            return runBlocking {
-                val accessTokenFuture = CompletableDeferred<String>()
-
-                authState.performActionWithFreshTokens(authService) { accessToken: String?, _: String?, ex: AuthorizationException? ->
-                    if (accessToken != null) {
-                        // persist updated AuthState
-                        callback?.onUpdate(authState)
-
-                        // emit access token
-                        accessTokenFuture.complete(accessToken)
-                    }
-                    else {
-                        logger.log(Level.WARNING, "Couldn't obtain access token", ex)
-                        accessTokenFuture.cancel()
-                    }
-                }
-
-                // return value
-                try {
-                    BearerAuthInterceptor(accessTokenFuture.await())
-                } catch (ignored: CancellationException) {
-                    null
-                }
-            }
-        }
-
-    }
-
-    override fun intercept(chain: Interceptor.Chain): Response {
-        logger.finer("Authenticating request with access token")
-        val rq = chain.request().newBuilder()
-            .header("Authorization", "Bearer $accessToken")
-            .build()
-        return chain.proceed(rq)
-    }
-
-
-    fun interface AuthStateUpdateCallback {
-        fun onUpdate(authState: AuthState)
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/network/GoogleLogin.kt

@@ -1,91 +0,0 @@
-/***************************************************************************************************
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- **************************************************************************************************/
-
-package at.bitfire.davdroid.network
-
-import android.net.Uri
-import at.bitfire.davdroid.BuildConfig
-import at.bitfire.davdroid.db.Credentials
-import kotlinx.coroutines.CompletableDeferred
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.withContext
-import net.openid.appauth.AuthState
-import net.openid.appauth.AuthorizationException
-import net.openid.appauth.AuthorizationRequest
-import net.openid.appauth.AuthorizationResponse
-import net.openid.appauth.AuthorizationService
-import net.openid.appauth.AuthorizationServiceConfiguration
-import net.openid.appauth.ResponseTypeValues
-import net.openid.appauth.TokenResponse
-import java.net.URI
-import java.util.logging.Logger
-
-class GoogleLogin(
-    val authService: AuthorizationService
-) {
-    
-    private val logger: Logger = Logger.getGlobal()
-
-
-    companion object {
-
-        // davx5integration@gmail.com (for davx5-ose)
-        private const val CLIENT_ID = "1069050168830-eg09u4tk1cmboobevhm4k3bj1m4fav9i.apps.googleusercontent.com"
-
-        private val SCOPES = arrayOf(
-            "https://www.googleapis.com/auth/calendar",     // CalDAV
-            "https://www.googleapis.com/auth/carddav"       // CardDAV
-        )
-
-        /**
-         * Gets the Google CalDAV/CardDAV base URI. See https://developers.google.com/calendar/caldav/v2/guide;
-         * _calid_ of the primary calendar is the account name.
-         *
-         * This URL allows CardDAV (over well-known URLs) and CalDAV detection including calendar-homesets and secondary
-         * calendars.
-         */
-        fun googleBaseUri(googleAccount: String): URI =
-            URI("https", "apidata.googleusercontent.com", "/caldav/v2/$googleAccount/user", null)
-
-        private val serviceConfig = AuthorizationServiceConfiguration(
-            Uri.parse("https://accounts.google.com/o/oauth2/v2/auth"),
-            Uri.parse("https://oauth2.googleapis.com/token")
-        )
-
-    }
-
-    fun signIn(email: String, customClientId: String?, locale: String?): AuthorizationRequest {
-        val builder = AuthorizationRequest.Builder(
-            GoogleLogin.serviceConfig,
-            customClientId ?: CLIENT_ID,
-            ResponseTypeValues.CODE,
-            Uri.parse(BuildConfig.APPLICATION_ID + ":/oauth2/redirect")
-        )
-        return builder
-            .setScopes(*SCOPES)
-            .setLoginHint(email)
-            .setUiLocales(locale)
-            .build()
-    }
-
-    suspend fun authenticate(authResponse: AuthorizationResponse): Credentials {
-        val authState = AuthState(authResponse, null)       // authorization code must not be stored; exchange it to refresh token
-        val credentials = CompletableDeferred<Credentials>()
-
-        withContext(Dispatchers.IO) {
-            authService.performTokenRequest(authResponse.createTokenExchangeRequest()) { tokenResponse: TokenResponse?, refreshTokenException: AuthorizationException? ->
-                logger.info("Refresh token response: ${tokenResponse?.jsonSerializeString()}")
-
-                if (tokenResponse != null) {
-                    // success, save authState (= refresh token)
-                    authState.update(tokenResponse, refreshTokenException)
-                    credentials.complete(Credentials(authState = authState))
-                }
-            }
-        }
-
-        return credentials.await()
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/network/HttpClient.kt

@@ -1,338 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.network
-
-import android.content.Context
-import android.os.Build
-import android.security.KeyChain
-import at.bitfire.cert4android.CustomCertManager
-import at.bitfire.dav4jvm.BasicDigestAuthHandler
-import at.bitfire.dav4jvm.UrlUtils
-import at.bitfire.davdroid.BuildConfig
-import at.bitfire.davdroid.db.Credentials
-import at.bitfire.davdroid.settings.AccountSettings
-import at.bitfire.davdroid.settings.Settings
-import at.bitfire.davdroid.settings.SettingsManager
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedFactory
-import dagger.assisted.AssistedInject
-import dagger.hilt.EntryPoint
-import dagger.hilt.InstallIn
-import dagger.hilt.android.EntryPointAccessors
-import dagger.hilt.components.SingletonComponent
-import java.io.File
-import java.net.InetSocketAddress
-import java.net.Proxy
-import java.net.Socket
-import java.security.KeyStore
-import java.security.Principal
-import java.util.Locale
-import java.util.concurrent.TimeUnit
-import java.util.logging.Level
-import java.util.logging.Logger
-import javax.net.ssl.KeyManager
-import javax.net.ssl.SSLContext
-import javax.net.ssl.TrustManagerFactory
-import javax.net.ssl.X509ExtendedKeyManager
-import javax.net.ssl.X509TrustManager
-import kotlinx.coroutines.flow.MutableStateFlow
-import net.openid.appauth.AuthState
-import net.openid.appauth.AuthorizationService
-import okhttp3.Cache
-import okhttp3.ConnectionSpec
-import okhttp3.CookieJar
-import okhttp3.Interceptor
-import okhttp3.OkHttp
-import okhttp3.OkHttpClient
-import okhttp3.Protocol
-import okhttp3.Response
-import okhttp3.brotli.BrotliInterceptor
-import okhttp3.internal.tls.OkHostnameVerifier
-import okhttp3.logging.HttpLoggingInterceptor
-
-class HttpClient @AssistedInject constructor(
-    @Assisted val okHttpClient: OkHttpClient,
-    @Assisted private var authService: AuthorizationService? = null,
-    val settingsManager: SettingsManager
-): AutoCloseable {
-
-    companion object {
-        /** max. size of disk cache (10 MB) */
-        const val DISK_CACHE_MAX_SIZE: Long = 10*1024*1024
-
-        /** Base Builder to build all clients from. Use rarely; [OkHttpClient]s should
-         * be reused as much as possible. */
-        fun baseBuilder() =
-            OkHttpClient.Builder()
-                // Set timeouts. According to [AbstractThreadedSyncAdapter], when there is no network
-                // traffic within a minute, a sync will be cancelled.
-                .connectTimeout(15, TimeUnit.SECONDS)
-                .writeTimeout(30, TimeUnit.SECONDS)
-                .readTimeout(120, TimeUnit.SECONDS)
-                .pingInterval(
-                    45,
-                    TimeUnit.SECONDS
-                )     // avoid cancellation because of missing traffic; only works for HTTP/2
-
-                // keep TLS 1.0 and 1.1 for now; remove when major browsers have dropped it (probably 2020)
-                .connectionSpecs(
-                    listOf(
-                        ConnectionSpec.CLEARTEXT,
-                        ConnectionSpec.COMPATIBLE_TLS
-                    )
-                )
-
-                // don't allow redirects by default, because it would break PROPFIND handling
-                .followRedirects(false)
-
-                // add User-Agent to every request
-                .addInterceptor(UserAgentInterceptor)
-    }
-
-    @AssistedFactory
-    interface Factory {
-        fun create(okHttpClient: OkHttpClient, authService: AuthorizationService?): HttpClient
-    }
-
-
-    override fun close() {
-        authService?.dispose()
-        okHttpClient.cache?.close()
-    }
-
-
-    class Builder(
-        val context: Context,
-        accountSettings: AccountSettings? = null,
-        val logger: Logger = Logger.getGlobal(),
-        val loggerLevel: HttpLoggingInterceptor.Level = HttpLoggingInterceptor.Level.BODY
-    ) {
-
-        @EntryPoint
-        @InstallIn(SingletonComponent::class)
-        interface HttpClientBuilderEntryPoint {
-            fun authorizationService(): AuthorizationService
-            fun httpClientFactory(): Factory
-            fun settingsManager(): SettingsManager
-        }
-
-        private val entryPoint = EntryPointAccessors.fromApplication<HttpClientBuilderEntryPoint>(context)
-
-        fun interface CertManagerProducer {
-            fun certManager(): CustomCertManager
-        }
-
-        private var appInForeground: MutableStateFlow<Boolean>? =
-                MutableStateFlow(false)
-        private var authService: AuthorizationService? = null
-        private var certManagerProducer: CertManagerProducer? = null
-        private var certificateAlias: String? = null
-        private var offerCompression: Boolean = false
-
-        // default cookie store for non-persistent cookies (some services like Horde use cookies for session tracking)
-        private var cookieStore: CookieJar? = MemoryCookieStore()
-
-        private val orig = baseBuilder()
-
-        init {
-            // add network logging, if requested
-            if (logger.isLoggable(Level.FINEST)) {
-                val loggingInterceptor = HttpLoggingInterceptor { message -> logger.finest(message) }
-                loggingInterceptor.level = loggerLevel
-                orig.addNetworkInterceptor(loggingInterceptor)
-            }
-
-            val settings = entryPoint.settingsManager()
-
-            // custom proxy support
-            try {
-                val proxyTypeValue = settings.getInt(Settings.PROXY_TYPE)
-                if (proxyTypeValue != Settings.PROXY_TYPE_SYSTEM) {
-                    // we set our own proxy
-                    val address by lazy {           // lazy because not required for PROXY_TYPE_NONE
-                        InetSocketAddress(
-                            settings.getString(Settings.PROXY_HOST),
-                            settings.getInt(Settings.PROXY_PORT)
-                        )
-                    }
-                    val proxy =
-                        when (proxyTypeValue) {
-                            Settings.PROXY_TYPE_NONE -> Proxy.NO_PROXY
-                            Settings.PROXY_TYPE_HTTP -> Proxy(Proxy.Type.HTTP, address)
-                            Settings.PROXY_TYPE_SOCKS -> Proxy(Proxy.Type.SOCKS, address)
-                            else -> throw IllegalArgumentException("Invalid proxy type")
-                        }
-                    orig.proxy(proxy)
-                    logger.log(Level.INFO, "Using proxy setting", proxy)
-                }
-            } catch (e: Exception) {
-                logger.log(Level.SEVERE, "Can't set proxy, ignoring", e)
-            }
-
-            customCertManager {
-                // by default, use a CustomCertManager that respects the "distrust system certificates" setting
-                val trustSystemCerts = !settings.getBoolean(Settings.DISTRUST_SYSTEM_CERTIFICATES)
-                CustomCertManager(context, trustSystemCerts, appInForeground)
-            }
-
-            // use account settings for authentication and cookies
-            if (accountSettings != null)
-                addAuthentication(null, accountSettings.credentials(), authStateCallback = { authState: AuthState ->
-                    accountSettings.credentials(Credentials(authState = authState))
-                })
-        }
-
-        constructor(context: Context, host: String?, credentials: Credentials?) : this(context) {
-            if (credentials != null)
-                addAuthentication(host, credentials)
-        }
-
-        fun addAuthentication(host: String?, credentials: Credentials, insecurePreemptive: Boolean = false, authStateCallback: BearerAuthInterceptor.AuthStateUpdateCallback? = null): Builder {
-            if (credentials.username != null && credentials.password != null) {
-                val authHandler = BasicDigestAuthHandler(UrlUtils.hostToDomain(host), credentials.username, credentials.password, insecurePreemptive)
-                orig.addNetworkInterceptor(authHandler)
-                    .authenticator(authHandler)
-            }
-
-            if (credentials.certificateAlias != null)
-                certificateAlias = credentials.certificateAlias
-
-            credentials.authState?.let { authState ->
-                val newAuthService = entryPoint.authorizationService()
-                authService = newAuthService
-                BearerAuthInterceptor.fromAuthState(newAuthService, authState, authStateCallback)?.let { bearerAuthInterceptor ->
-                    orig.addNetworkInterceptor(bearerAuthInterceptor)
-                }
-            }
-            return this
-        }
-
-        fun allowCompression(allow: Boolean): Builder {
-            offerCompression = allow
-            return this
-        }
-
-        fun cookieStore(store: CookieJar?): Builder {
-            cookieStore = store
-            return this
-        }
-
-        fun followRedirects(follow: Boolean): Builder {
-            orig.followRedirects(follow)
-            return this
-        }
-
-        fun customCertManager(producer: CertManagerProducer) {
-            certManagerProducer = producer
-        }
-        fun setForeground(foreground: Boolean): Builder {
-            appInForeground?.value = foreground
-            return this
-        }
-
-        fun withDiskCache(): Builder {
-            for (dir in arrayOf(context.externalCacheDir, context.cacheDir).filterNotNull()) {
-                if (dir.exists() && dir.canWrite()) {
-                    val cacheDir = File(dir, "HttpClient")
-                    cacheDir.mkdir()
-                    logger.fine("Using disk cache: $cacheDir")
-                    orig.cache(Cache(cacheDir, DISK_CACHE_MAX_SIZE))
-                    break
-                }
-            }
-            return this
-        }
-
-        fun build(): HttpClient {
-            cookieStore?.let {
-                orig.cookieJar(it)
-            }
-
-            if (offerCompression)
-                // offer Brotli and gzip compression
-                orig.addInterceptor(BrotliInterceptor)
-
-            var keyManager: KeyManager? = null
-            certificateAlias?.let { alias ->
-                // get provider certificate and private key
-                val certs = KeyChain.getCertificateChain(context, alias) ?: return@let
-                val key = KeyChain.getPrivateKey(context, alias) ?: return@let
-                logger?.fine("Using provider certificate $alias for authentication (chain length: ${certs.size})")
-
-                // create KeyManager
-                keyManager = object : X509ExtendedKeyManager() {
-                    override fun getServerAliases(p0: String?, p1: Array<out Principal>?): Array<String>? = null
-                    override fun chooseServerAlias(p0: String?, p1: Array<out Principal>?, p2: Socket?) = null
-
-                    override fun getClientAliases(p0: String?, p1: Array<out Principal>?) =
-                            arrayOf(alias)
-
-                    override fun chooseClientAlias(p0: Array<out String>?, p1: Array<out Principal>?, p2: Socket?) =
-                            alias
-
-                    override fun getCertificateChain(forAlias: String?) =
-                            certs.takeIf { forAlias == alias }
-
-                    override fun getPrivateKey(forAlias: String?) =
-                            key.takeIf { forAlias == alias }
-                }
-
-                // HTTP/2 doesn't support client certificates (yet)
-                // see https://tools.ietf.org/html/draft-ietf-httpbis-http2-secondary-certs-04
-                orig.protocols(listOf(Protocol.HTTP_1_1))
-            }
-
-            if (certManagerProducer != null || keyManager != null) {
-                val manager = certManagerProducer?.certManager()
-
-                val trustManager = manager ?: /* fall back to system default trust manager */
-                    TrustManagerFactory.getInstance(TrustManagerFactory.getDefaultAlgorithm())
-                    .let { factory ->
-                        factory.init(null as KeyStore?)
-                        factory.trustManagers.first() as X509TrustManager
-                    }
-
-                val hostnameVerifier =
-                    if (manager != null)
-                        manager.HostnameVerifier(OkHostnameVerifier)
-                    else
-                        OkHostnameVerifier
-
-                val sslContext = SSLContext.getInstance("TLS")
-                sslContext.init(
-                    if (keyManager != null) arrayOf(keyManager) else null,
-                    arrayOf(trustManager),
-                    null)
-                orig.sslSocketFactory(sslContext.socketFactory, trustManager)
-                orig.hostnameVerifier(hostnameVerifier)
-            }
-
-            return entryPoint.httpClientFactory().create(orig.build(), authService = authService)
-        }
-
-    }
-
-
-    object UserAgentInterceptor: Interceptor {
-
-        val userAgent = "DAVx5/${BuildConfig.VERSION_NAME} (dav4jvm; " +
-                "okhttp/${OkHttp.VERSION}) Android/${Build.VERSION.RELEASE}"
-
-        init {
-            Logger.getGlobal().info("Will set User-Agent: $userAgent")
-        }
-
-        override fun intercept(chain: Interceptor.Chain): Response {
-            val locale = Locale.getDefault()
-            val request = chain.request().newBuilder()
-                    .header("User-Agent", userAgent)
-                    .header("Accept-Language", "${locale.language}-${locale.country}, ${locale.language};q=0.7, *;q=0.5")
-                    .build()
-            return chain.proceed(request)
-        }
-
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/network/NextcloudLoginFlow.kt

@@ -1,141 +0,0 @@
-/***************************************************************************************************
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- **************************************************************************************************/
-
-package at.bitfire.davdroid.network
-
-import android.content.Context
-import at.bitfire.dav4jvm.exception.DavException
-import at.bitfire.dav4jvm.exception.HttpException
-import at.bitfire.davdroid.db.Credentials
-import at.bitfire.davdroid.ui.setup.LoginInfo
-import at.bitfire.davdroid.util.withTrailingSlash
-import at.bitfire.vcard4android.GroupMethod
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.runInterruptible
-import kotlinx.coroutines.withContext
-import okhttp3.HttpUrl
-import okhttp3.HttpUrl.Companion.toHttpUrl
-import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
-import okhttp3.MediaType.Companion.toMediaType
-import okhttp3.Request
-import okhttp3.RequestBody
-import okhttp3.RequestBody.Companion.toRequestBody
-import org.json.JSONObject
-import java.net.HttpURLConnection
-import java.net.URI
-
-/**
- * Implements Nextcloud Login Flow v2.
- *
- * See https://docs.nextcloud.com/server/latest/developer_manual/client_apis/LoginFlow/index.html#login-flow-v2
- */
-class NextcloudLoginFlow(
-    context: Context
-): AutoCloseable {
-
-    companion object {
-        const val FLOW_V1_PATH = "index.php/login/flow"
-        const val FLOW_V2_PATH = "index.php/login/v2"
-
-        /** Path to DAV endpoint (e.g. `remote.php/dav`). Will be appended to the server URL returned by Login Flow. */
-        const val DAV_PATH = "remote.php/dav"
-    }
-
-    val httpClient = HttpClient.Builder(context)
-        .setForeground(true)
-        .build()
-
-    override fun close() {
-        httpClient.close()
-    }
-
-
-    // Login flow state
-    var loginUrl: HttpUrl? = null
-    var pollUrl: HttpUrl? = null
-    var token: String? = null
-
-
-    suspend fun initiate(baseUrl: HttpUrl): HttpUrl? {
-        loginUrl = null
-        pollUrl = null
-        token = null
-
-        val json = postForJson(initiateUrl(baseUrl), "".toRequestBody())
-
-        loginUrl = json.getString("login").toHttpUrlOrNull()
-        json.getJSONObject("poll").let { poll ->
-            pollUrl = poll.getString("endpoint").toHttpUrl()
-            token = poll.getString("token")
-        }
-
-        return loginUrl
-    }
-
-    fun initiateUrl(baseUrl: HttpUrl): HttpUrl {
-        val path = baseUrl.encodedPath
-
-        if (path.endsWith(FLOW_V2_PATH))
-            // already a Login Flow v2 URL
-            return baseUrl
-
-        if (path.endsWith(FLOW_V1_PATH))
-            // Login Flow v1 URL, rewrite to v2
-            return baseUrl.newBuilder()
-                .encodedPath(path.replace(FLOW_V1_PATH, FLOW_V2_PATH))
-                .build()
-
-        // other URL, make it a Login Flow v2 URL
-        return baseUrl.newBuilder()
-            .addPathSegments(FLOW_V2_PATH)
-            .build()
-    }
-
-
-    suspend fun fetchLoginInfo(): LoginInfo {
-        val pollUrl = pollUrl ?: throw IllegalArgumentException("Missing pollUrl")
-        val token = token ?: throw IllegalArgumentException("Missing token")
-
-        // send HTTP request to request server, login name and app password
-        val json = postForJson(pollUrl, "token=$token".toRequestBody("application/x-www-form-urlencoded".toMediaType()))
-
-        // make sure server URL ends with a slash so that DAV_PATH can be appended
-        val serverUrl = json.getString("server").withTrailingSlash()
-
-        return LoginInfo(
-            baseUri = URI(serverUrl).resolve(DAV_PATH),
-            credentials = Credentials(
-                username = json.getString("loginName"),
-                password = json.getString("appPassword")
-            ),
-            suggestedGroupMethod = GroupMethod.CATEGORIES
-        )
-    }
-
-
-    private suspend fun postForJson(url: HttpUrl, requestBody: RequestBody): JSONObject = withContext(Dispatchers.IO) {
-        val postRq = Request.Builder()
-            .url(url)
-            .post(requestBody)
-            .build()
-        val response = runInterruptible {
-            httpClient.okHttpClient.newCall(postRq).execute()
-        }
-
-        if (response.code != HttpURLConnection.HTTP_OK)
-            throw HttpException(response)
-
-        response.body?.use { body ->
-            val mimeType = body.contentType() ?: throw DavException("Login Flow response without MIME type")
-            if (mimeType.type != "application" || mimeType.subtype != "json")
-                throw DavException("Invalid Login Flow response (not JSON)")
-
-            // decode JSON
-            return@withContext JSONObject(body.string())
-        }
-
-        throw DavException("Invalid Login Flow response (no body)")
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/push/PushMessageParser.kt

@@ -1,43 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.push
-
-import at.bitfire.dav4jvm.XmlReader
-import at.bitfire.dav4jvm.XmlUtils
-import at.bitfire.dav4jvm.property.push.PushMessage
-import org.xmlpull.v1.XmlPullParserException
-import java.io.StringReader
-import java.util.logging.Level
-import java.util.logging.Logger
-import javax.inject.Inject
-
-class PushMessageParser @Inject constructor(
-    private val logger: Logger
-) {
-
-    /**
-     * Parses a WebDAV-Push message and returns the `topic` that the message is about.
-     *
-     * @return topic of the modified collection, or `null` if the topic couldn't be determined
-     */
-    operator fun invoke(message: String): String? {
-        var topic: String? = null
-
-        val parser = XmlUtils.newPullParser()
-        try {
-            parser.setInput(StringReader(message))
-
-            XmlReader(parser).processTag(PushMessage.NAME) {
-                val pushMessage = PushMessage.Factory.create(parser)
-                topic = pushMessage.topic
-            }
-        } catch (e: XmlPullParserException) {
-            logger.log(Level.WARNING, "Couldn't parse push message", e)
-        }
-
-        return topic
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/push/PushRegistrationWorker.kt

@@ -1,217 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.push
-
-import android.accounts.Account
-import android.content.Context
-import androidx.hilt.work.HiltWorker
-import androidx.work.Constraints
-import androidx.work.CoroutineWorker
-import androidx.work.ExistingWorkPolicy
-import androidx.work.NetworkType
-import androidx.work.OneTimeWorkRequestBuilder
-import androidx.work.WorkManager
-import androidx.work.WorkerParameters
-import at.bitfire.dav4jvm.DavCollection
-import at.bitfire.dav4jvm.DavResource
-import at.bitfire.dav4jvm.Property
-import at.bitfire.dav4jvm.XmlUtils
-import at.bitfire.dav4jvm.XmlUtils.insertTag
-import at.bitfire.dav4jvm.exception.DavException
-import at.bitfire.dav4jvm.property.push.NS_WEBDAV_PUSH
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.network.HttpClient
-import at.bitfire.davdroid.repository.DavCollectionRepository
-import at.bitfire.davdroid.repository.DavServiceRepository
-import at.bitfire.davdroid.repository.PreferenceRepository
-import at.bitfire.davdroid.settings.AccountSettings
-import dagger.Binds
-import dagger.Module
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedInject
-import dagger.hilt.InstallIn
-import dagger.hilt.android.qualifiers.ApplicationContext
-import dagger.hilt.components.SingletonComponent
-import dagger.multibindings.IntoSet
-import kotlinx.coroutines.runInterruptible
-import okhttp3.HttpUrl
-import okhttp3.HttpUrl.Companion.toHttpUrlOrNull
-import okhttp3.RequestBody.Companion.toRequestBody
-import java.io.StringWriter
-import java.util.concurrent.TimeUnit
-import java.util.logging.Level
-import java.util.logging.Logger
-import javax.inject.Inject
-
-/**
- * Worker that registers push for all collections that support it.
- * To be run as soon as a collection that supports push is changed (selected for sync status
- * changes, or collection is created, deleted, etc).
- *
- * TODO Should run periodically, too (to refresh registrations that are about to expire).
- * Not required for a first demonstration version.
- */
-@Suppress("unused")
-@HiltWorker
-class PushRegistrationWorker @AssistedInject constructor(
-    @Assisted context: Context,
-    @Assisted workerParameters: WorkerParameters,
-    private val accountSettingsFactory: AccountSettings.Factory,
-    private val collectionRepository: DavCollectionRepository,
-    private val logger: Logger,
-    private val preferenceRepository: PreferenceRepository,
-    private val serviceRepository: DavServiceRepository
-) : CoroutineWorker(context, workerParameters) {
-
-    companion object {
-
-        private const val UNIQUE_WORK_NAME = "push-registration"
-
-        /**
-         * Enqueues a push registration worker with a minimum delay of 5 seconds.
-         */
-        fun enqueue(context: Context) {
-            val constraints = Constraints.Builder()
-                .setRequiredNetworkType(NetworkType.CONNECTED)   // require a network connection
-                .build()
-            val workRequest = OneTimeWorkRequestBuilder<PushRegistrationWorker>()
-                .setInitialDelay(5, TimeUnit.SECONDS)
-                .setConstraints(constraints)
-                .build()
-            Logger.getGlobal().info("Enqueueing push registration worker")
-            WorkManager.getInstance(context)
-                .enqueueUniqueWork(UNIQUE_WORK_NAME, ExistingWorkPolicy.REPLACE, workRequest)
-        }
-
-    }
-
-
-    override suspend fun doWork(): Result {
-        logger.info("Running push registration worker")
-
-        registerSyncable()
-        unregisterNotSyncable()
-
-        return Result.success()
-    }
-
-    private suspend fun registerPushSubscription(collection: Collection, account: Account, endpoint: String) {
-        val settings = accountSettingsFactory.create(account)
-
-        runInterruptible {
-            HttpClient.Builder(applicationContext, settings)
-                .setForeground(true)
-                .build()
-                .use { client ->
-                    val httpClient = client.okHttpClient
-
-                    val serializer = XmlUtils.newSerializer()
-                    val writer = StringWriter()
-                    serializer.setOutput(writer)
-                    serializer.startDocument("UTF-8", true)
-                    serializer.insertTag(Property.Name(NS_WEBDAV_PUSH, "push-register")) {
-                        serializer.insertTag(Property.Name(NS_WEBDAV_PUSH, "subscription")) {
-                            serializer.insertTag(Property.Name(NS_WEBDAV_PUSH, "web-push-subscription")) {
-                                serializer.insertTag(Property.Name(NS_WEBDAV_PUSH, "push-resource")) {
-                                    text(endpoint)
-                                }
-                            }
-                        }
-                    }
-                    serializer.endDocument()
-
-                    val xml = writer.toString().toRequestBody(DavResource.MIME_XML)
-                    DavCollection(httpClient, collection.url).post(xml) { response ->
-                        if (response.isSuccessful) {
-                            response.header("Location")?.let  { subscriptionUrl ->
-                                collectionRepository.updatePushSubscription(collection.id, subscriptionUrl)
-                            }
-                        } else
-                            logger.warning("Couldn't register push for ${collection.url}: $response")
-                    }
-                }
-        }
-    }
-
-    private suspend fun registerSyncable() {
-        val endpoint = preferenceRepository.unifiedPushEndpoint()
-
-        // register push subscription for syncable collections
-        if (endpoint != null)
-            for (collection in collectionRepository.getPushCapableAndSyncable()) {
-                logger.info("Registering push for ${collection.url}")
-                serviceRepository.get(collection.serviceId)?.let { service ->
-                    val account = Account(service.accountName, applicationContext.getString(R.string.account_type))
-                    try {
-                        registerPushSubscription(collection, account, endpoint)
-                    } catch (e: DavException) {
-                        // catch possible per-collection exception so that all collections can be processed
-                        logger.log(Level.WARNING, "Couldn't register push for ${collection.url}", e)
-                    }
-                }
-            }
-        else
-            logger.info("No UnifiedPush endpoint configured")
-    }
-
-    private suspend fun unregisterPushSubscription(collection: Collection, account: Account, url: HttpUrl) {
-        val settings = accountSettingsFactory.create(account)
-
-        runInterruptible {
-            HttpClient.Builder(applicationContext, settings)
-                .setForeground(true)
-                .build()
-                .use { client ->
-                    val httpClient = client.okHttpClient
-
-                    try {
-                        DavResource(httpClient, url).delete {
-                            // deleted
-                        }
-                    } catch (e: DavException) {
-                        logger.log(Level.WARNING, "Couldn't unregister push for ${collection.url}", e)
-                    }
-
-                    // remove registration URL from DB in any case
-                    collectionRepository.updatePushSubscription(collection.id, null)
-                }
-        }
-    }
-
-    private suspend fun unregisterNotSyncable() {
-        for (collection in collectionRepository.getPushRegisteredAndNotSyncable()) {
-            logger.info("Unregistering push for ${collection.url}")
-            collection.pushSubscription?.toHttpUrlOrNull()?.let { url ->
-                serviceRepository.get(collection.serviceId)?.let { service ->
-                    val account = Account(service.accountName, applicationContext.getString(R.string.account_type))
-                    unregisterPushSubscription(collection, account, url)
-                }
-            }
-        }
-    }
-
-
-    /**
-     * Listener that enqueues a push registration worker when the collection list changes.
-     */
-    class CollectionsListener @Inject constructor(
-        @ApplicationContext val context: Context
-    ): DavCollectionRepository.OnChangeListener {
-        override fun onCollectionsChanged() = enqueue(context)
-    }
-
-    /**
-     * Hilt module that registers [CollectionsListener] in [DavCollectionRepository].
-     */
-    @Module
-    @InstallIn(SingletonComponent::class)
-    interface PushRegistrationWorkerModule {
-        @Binds
-        @IntoSet
-        fun listener(impl: CollectionsListener): DavCollectionRepository.OnChangeListener
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/push/UnifiedPushReceiver.kt

@@ -1,90 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.push
-
-import android.content.Context
-import at.bitfire.davdroid.repository.AccountRepository
-import at.bitfire.davdroid.repository.DavCollectionRepository
-import at.bitfire.davdroid.repository.DavServiceRepository
-import at.bitfire.davdroid.repository.PreferenceRepository
-import at.bitfire.davdroid.sync.worker.SyncWorkerManager
-import dagger.hilt.android.AndroidEntryPoint
-import java.util.logging.Level
-import java.util.logging.Logger
-import javax.inject.Inject
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
-import org.unifiedpush.android.connector.MessagingReceiver
-
-@AndroidEntryPoint
-class UnifiedPushReceiver: MessagingReceiver() {
-
-    @Inject
-    lateinit var accountRepository: AccountRepository
-
-    @Inject
-    lateinit var collectionRepository: DavCollectionRepository
-    
-    @Inject
-    lateinit var logger: Logger
-
-    @Inject
-    lateinit var serviceRepository: DavServiceRepository
-
-    @Inject
-    lateinit var preferenceRepository: PreferenceRepository
-
-    @Inject
-    lateinit var parsePushMessage: PushMessageParser
-
-    @Inject
-    lateinit var syncWorkerManager: SyncWorkerManager
-
-
-    override fun onNewEndpoint(context: Context, endpoint: String, instance: String) {
-        // remember new endpoint
-        preferenceRepository.unifiedPushEndpoint(endpoint)
-
-        // register new endpoint at CalDAV/CardDAV servers
-        PushRegistrationWorker.enqueue(context)
-    }
-
-    override fun onUnregistered(context: Context, instance: String) {
-        // reset known endpoint
-        preferenceRepository.unifiedPushEndpoint(null)
-    }
-
-    override fun onMessage(context: Context, message: ByteArray, instance: String) {
-        CoroutineScope(Dispatchers.Default).launch {
-            val messageXml = message.toString(Charsets.UTF_8)
-            logger.log(Level.INFO, "Received push message", messageXml)
-
-            // parse push notification
-            val topic = parsePushMessage(messageXml)
-
-            // sync affected collection
-            if (topic != null) {
-                logger.info("Got push notification for topic $topic")
-
-                // Sync all authorities of account that the collection belongs to
-                // Later: only sync affected collection and authorities
-                collectionRepository.getSyncableByTopic(topic)?.let { collection ->
-                    serviceRepository.get(collection.serviceId)?.let { service ->
-                        val account = accountRepository.fromName(service.accountName)
-                        syncWorkerManager.enqueueOneTimeAllAuthorities(account, fromPush = true)
-                    }
-                }
-
-            } else {
-                logger.warning("Got push message without topic, syncing all accounts")
-                for (account in accountRepository.getAll())
-                    syncWorkerManager.enqueueOneTimeAllAuthorities(account, fromPush = true)
-
-            }
-        }
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/repository/DavHomeSetRepository.kt

@@ -1,50 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.repository
-
-import android.accounts.Account
-import androidx.room.Transaction
-import at.bitfire.davdroid.db.AppDatabase
-import at.bitfire.davdroid.db.HomeSet
-import at.bitfire.davdroid.db.Service
-import javax.inject.Inject
-
-class DavHomeSetRepository @Inject constructor(
-    db: AppDatabase
-) {
-
-    val dao = db.homeSetDao()
-
-    fun getAddressBookHomeSetsFlow(account: Account) =
-        dao.getBindableByAccountAndServiceTypeFlow(account.name, Service.TYPE_CARDDAV)
-
-    fun getBindableByServiceFlow(serviceId: Long) = dao.getBindableByServiceFlow(serviceId)
-
-    fun getById(id: Long) = dao.getById(id)
-
-    fun getByService(serviceId: Long) = dao.getByService(serviceId)
-
-    fun getCalendarHomeSetsFlow(account: Account) =
-        dao.getBindableByAccountAndServiceTypeFlow(account.name, Service.TYPE_CALDAV)
-
-
-    /**
-     * Tries to insert new row, but updates existing row if already present.
-     * This method preserves the primary key, as opposed to using "@Insert(onConflict = OnConflictStrategy.REPLACE)"
-     * which will create a new row with incremented ID and thus breaks entity relationships!
-     *
-     * @return ID of the row, that has been inserted or updated. -1 If the insert fails due to other reasons.
-     */
-    @Transaction
-    fun insertOrUpdateByUrl(homeset: HomeSet): Long =
-        dao.getByUrl(homeset.serviceId, homeset.url.toString())?.let { existingHomeset ->
-            dao.update(homeset.copy(id = existingHomeset.id))
-            existingHomeset.id
-        } ?: dao.insert(homeset)
-
-
-    fun delete(homeSet: HomeSet) = dao.delete(homeSet)
-
-}

app/src/main/kotlin/at/bitfire/davdroid/repository/DavSyncStatsRepository.kt

@@ -1,77 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.repository
-
-import android.content.Context
-import android.content.pm.PackageManager
-import at.bitfire.davdroid.db.AppDatabase
-import at.bitfire.davdroid.db.SyncStats
-import dagger.hilt.android.qualifiers.ApplicationContext
-import java.text.Collator
-import java.util.logging.Logger
-import javax.inject.Inject
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.map
-
-class DavSyncStatsRepository @Inject constructor(
-    @ApplicationContext val context: Context,
-    db: AppDatabase,
-    private val logger: Logger
-) {
-
-    private val dao = db.syncStatsDao()
-
-    data class LastSynced(
-        val appName: String,
-        val lastSynced: Long
-    )
-    fun getLastSyncedFlow(collectionId: Long): Flow<List<LastSynced>> =
-        dao.getByCollectionIdFlow(collectionId).map { list ->
-            val collator = Collator.getInstance()
-            list.map { stats ->
-                LastSynced(
-                    appName = appNameFromAuthority(stats.authority),
-                    lastSynced = stats.lastSync
-                )
-            }.sortedWith { a, b ->
-                collator.compare(a.appName, b.appName)
-            }
-        }
-
-    fun logSyncTime(collectionId: Long, authority: String, lastSync: Long = System.currentTimeMillis()) {
-        dao.insertOrReplace(SyncStats(
-            id = 0,
-            collectionId = collectionId,
-            authority = authority,
-            lastSync = lastSync
-        ))
-    }
-
-
-    /**
-     * Tries to find the application name for given authority. Returns the authority if not
-     * found.
-     *
-     * @param authority authority to find the application name for (ie "at.techbee.jtx")
-     * @return the application name of authority (ie "jtx Board")
-     */
-    private fun appNameFromAuthority(authority: String): String {
-        val packageManager = context.packageManager
-        val packageName = packageManager.resolveContentProvider(authority, 0)?.packageName ?: authority
-        return try {
-            val appInfo = packageManager.getPackageInfo(packageName, 0).applicationInfo
-            if (appInfo != null) {
-                packageManager.getApplicationLabel(appInfo).toString()
-            } else {
-                logger.warning("Package name ($packageName) not found for authority: $authority")
-                authority
-            }
-        } catch (e: PackageManager.NameNotFoundException) {
-            logger.warning("Application name not found for authority: $authority")
-            authority
-        }
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/resource/LocalAddressBook.kt

@@ -1,479 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-package at.bitfire.davdroid.resource
-
-import android.accounts.Account
-import android.accounts.AccountManager
-import android.content.ContentProviderClient
-import android.content.ContentResolver
-import android.content.ContentUris
-import android.content.ContentValues
-import android.content.Context
-import android.os.Build
-import android.os.Bundle
-import android.os.RemoteException
-import android.provider.ContactsContract
-import android.provider.ContactsContract.CommonDataKinds.GroupMembership
-import android.provider.ContactsContract.Groups
-import android.provider.ContactsContract.RawContacts
-import androidx.annotation.OpenForTesting
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.SyncState
-import at.bitfire.davdroid.repository.DavCollectionRepository
-import at.bitfire.davdroid.repository.DavServiceRepository
-import at.bitfire.davdroid.settings.AccountSettings
-import at.bitfire.davdroid.sync.account.SystemAccountUtils
-import at.bitfire.davdroid.util.DavUtils.lastSegment
-import at.bitfire.davdroid.util.setAndVerifyUserData
-import at.bitfire.vcard4android.AndroidAddressBook
-import at.bitfire.vcard4android.AndroidContact
-import at.bitfire.vcard4android.AndroidGroup
-import at.bitfire.vcard4android.GroupMethod
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedFactory
-import dagger.assisted.AssistedInject
-import dagger.hilt.EntryPoint
-import dagger.hilt.InstallIn
-import dagger.hilt.android.EntryPointAccessors
-import dagger.hilt.android.qualifiers.ApplicationContext
-import dagger.hilt.components.SingletonComponent
-import java.util.LinkedList
-import java.util.logging.Level
-import java.util.logging.Logger
-
-/**
- * A local address book. Requires an own Android account, because Android manages contacts per
- * account and there is no such thing as "address books". So, DAVx5 creates a "DAVx5
- * address book" account for every CardDAV address book.
- *
- * @param addressBookAccount Address book account (not: DAVx5 account) storing the actual android address book
- * @param provider Content provider needed to access and modify the address book
- */
-@OpenForTesting
-open class LocalAddressBook @AssistedInject constructor(
-    @Assisted addressBookAccount: Account,
-    @Assisted provider: ContentProviderClient,
-    @ApplicationContext val context: Context,
-    private val accountSettingsFactory: AccountSettings.Factory,
-    private val collectionRepository: DavCollectionRepository,
-    private val logger: Logger,
-    private val serviceRepository: DavServiceRepository
-): AndroidAddressBook<LocalContact, LocalGroup>(addressBookAccount, provider, LocalContact.Factory, LocalGroup.Factory), LocalCollection<LocalAddress> {
-
-    companion object {
-
-        @EntryPoint
-        @InstallIn(SingletonComponent::class)
-        interface LocalAddressBookCompanionEntryPoint {
-            fun localAddressBookFactory(): Factory
-            fun serviceRepository(): DavServiceRepository
-            fun logger(): Logger
-        }
-
-        const val USER_DATA_URL = "url"
-        const val USER_DATA_COLLECTION_ID = "collection_id"
-        const val USER_DATA_READ_ONLY = "read_only"
-
-        /**
-         * Creates a new local address book.
-         *
-         * @param context        app context to resolve string resources
-         * @param provider       contacts provider client
-         * @param info           collection where to take the name and settings from
-         * @param forceReadOnly  `true`: set the address book to "force read-only"; `false`: determine read-only flag from [info]
-         */
-        fun create(context: Context, provider: ContentProviderClient, info: Collection, forceReadOnly: Boolean): LocalAddressBook {
-            val entryPoint = EntryPointAccessors.fromApplication<LocalAddressBookCompanionEntryPoint>(context)
-            val logger = entryPoint.logger()
-
-            val account = Account(accountName(context, info), context.getString(R.string.account_type_address_book))
-            val userData = initialUserData(info.url.toString(), info.id.toString())
-            logger.log(Level.INFO, "Creating local address book $account", userData)
-            if (!SystemAccountUtils.createAccount(context, account, userData))
-                throw IllegalStateException("Couldn't create address book account")
-
-            val factory = entryPoint.localAddressBookFactory()
-            val addressBook = factory.create(account, provider)
-            addressBook.updateSyncFrameworkSettings()
-
-            // initialize Contacts Provider Settings
-            val values = ContentValues(2)
-            values.put(ContactsContract.Settings.SHOULD_SYNC, 1)
-            values.put(ContactsContract.Settings.UNGROUPED_VISIBLE, 1)
-            addressBook.settings = values
-            addressBook.readOnly = forceReadOnly || !info.privWriteContent || info.forceReadOnly
-
-            return addressBook
-        }
-
-        /**
-         * Finds a [LocalAddressBook] based on its corresponding collection.
-         *
-         * @param id    collection ID to look for
-         *
-         * @return The [LocalAddressBook] for the given collection or *null* if not found
-         */
-        fun findByCollection(context: Context, provider: ContentProviderClient, id: Long): LocalAddressBook? {
-            val entryPoint = EntryPointAccessors.fromApplication<LocalAddressBookCompanionEntryPoint>(context)
-            val factory = entryPoint.localAddressBookFactory()
-
-            val accountManager = AccountManager.get(context)
-            return accountManager
-                .getAccountsByType(context.getString(R.string.account_type_address_book))
-                .filter { account ->
-                    accountManager.getUserData(account, USER_DATA_COLLECTION_ID)?.toLongOrNull() == id
-                }
-                .map { account -> factory.create(account, provider) }
-                .firstOrNull()
-        }
-
-        /**
-         * Deletes a [LocalAddressBook] based on its corresponding database collection.
-         *
-         * @param id    collection ID to look for
-         */
-        fun deleteByCollection(context: Context, id: Long) {
-            val accountManager = AccountManager.get(context)
-            val addressBookAccount = accountManager.getAccountsByType(context.getString(R.string.account_type_address_book)).firstOrNull { account ->
-                accountManager.getUserData(account, USER_DATA_COLLECTION_ID)?.toLongOrNull() == id
-            }
-            if (addressBookAccount != null)
-                accountManager.removeAccountExplicitly(addressBookAccount)
-        }
-
-        /**
-         * Creates a name for the address book account from its corresponding db collection info.
-         *
-         * The address book account name contains
-         * - the collection display name or last URL path segment
-         * - the actual account name
-         * - the collection ID, to make it unique.
-         *
-         * @param info The corresponding collection
-         */
-        fun accountName(context: Context, info: Collection): String {
-            // Name the address book after given collection display name, otherwise use last URL path segment
-            val sb = StringBuilder(info.displayName.let {
-                if (it.isNullOrEmpty())
-                    info.url.lastSegment
-                else
-                    it
-            })
-            // Add the actual account name to the address book account name
-            val entryPoint = EntryPointAccessors.fromApplication<LocalAddressBookCompanionEntryPoint>(context)
-            val serviceRepository = entryPoint.serviceRepository()
-            serviceRepository.get(info.serviceId)?.let { service ->
-                sb.append(" (${service.accountName})")
-            }
-            // Add the collection ID for uniqueness
-            sb.append(" #${info.id}")
-            return sb.toString()
-        }
-
-        private fun initialUserData(url: String, collectionId: String): Bundle {
-            val bundle = Bundle(3)
-            bundle.putString(USER_DATA_COLLECTION_ID, collectionId)
-            bundle.putString(USER_DATA_URL, url)
-            return bundle
-        }
-
-    }
-
-    @AssistedFactory
-    interface Factory {
-        fun create(addressBookAccount: Account, provider: ContentProviderClient): LocalAddressBook
-    }
-
-
-    override val tag: String
-        get() = "contacts-${account.name}"
-
-    override val title = addressBookAccount.name
-
-    /**
-     * Whether contact groups ([LocalGroup]) are included in query results
-     * and are affected by updates/deletes on generic members.
-     *
-     * For instance, if groupMethod is GROUP_VCARDS, [findDirty] will find only dirty [LocalContact]s,
-     * but if it is enabled, [findDirty] will find dirty [LocalContact]s and [LocalGroup]s.
-     */
-    open val groupMethod: GroupMethod by lazy {
-        val manager = AccountManager.get(context)
-        val account = manager.getUserData(addressBookAccount, USER_DATA_COLLECTION_ID)?.toLongOrNull()?.let { collectionId ->
-            collectionRepository.get(collectionId)?.let { collection ->
-                serviceRepository.get(collection.serviceId)?.let { service ->
-                    Account(service.accountName, context.getString(R.string.account_type))
-                }
-            }
-        }
-        if (account == null)
-            throw IllegalArgumentException("Collection of address book account $addressBookAccount does not have an account")
-        val accountSettings = accountSettingsFactory.create(account)
-        accountSettings.getGroupMethod()
-    }
-    private val includeGroups
-        get() = groupMethod == GroupMethod.GROUP_VCARDS
-
-    @Deprecated("Local collection should be identified by ID, not by URL")
-    override var collectionUrl: String
-        get() = AccountManager.get(context).getUserData(account, USER_DATA_URL)
-                ?: throw IllegalStateException("Address book has no URL")
-        set(url) = AccountManager.get(context).setAndVerifyUserData(account, USER_DATA_URL, url)
-
-    override var readOnly: Boolean
-        get() = AccountManager.get(context).getUserData(account, USER_DATA_READ_ONLY) != null
-        set(readOnly) = AccountManager.get(context).setAndVerifyUserData(account, USER_DATA_READ_ONLY, if (readOnly) "1" else null)
-
-    override var lastSyncState: SyncState?
-        get() = syncState?.let { SyncState.fromString(String(it)) }
-        set(state) {
-            syncState = state?.toString()?.toByteArray()
-        }
-
-
-    /* operations on the collection (address book) itself */
-
-    override fun markNotDirty(flags: Int): Int {
-        val values = ContentValues(1)
-        values.put(LocalContact.COLUMN_FLAGS, flags)
-        var number = provider!!.update(rawContactsSyncUri(), values, "${RawContacts.DIRTY}=0", null)
-
-        if (includeGroups) {
-            values.clear()
-            values.put(LocalGroup.COLUMN_FLAGS, flags)
-            number += provider!!.update(groupsSyncUri(), values, "NOT ${Groups.DIRTY}", null)
-        }
-
-        return number
-    }
-
-    override fun removeNotDirtyMarked(flags: Int): Int {
-        var number = provider!!.delete(rawContactsSyncUri(),
-                "NOT ${RawContacts.DIRTY} AND ${LocalContact.COLUMN_FLAGS}=?", arrayOf(flags.toString()))
-
-        if (includeGroups)
-            number += provider!!.delete(groupsSyncUri(),
-                    "NOT ${Groups.DIRTY} AND ${LocalGroup.COLUMN_FLAGS}=?", arrayOf(flags.toString()))
-
-        return number
-    }
-
-    /**
-     * Updates the address book settings.
-     *
-     * @param info  collection where to take the settings from
-     * @param forceReadOnly  `true`: set the address book to "force read-only";
-     *                       `false`: determine read-only flag from [info];
-     *                       `null`: don't change the existing value
-     */
-    fun update(info: Collection, forceReadOnly: Boolean? = null) {
-        logger.log(Level.INFO, "Updating local address book $account with collection $info")
-        val accountManager = AccountManager.get(context)
-
-        // Update the account name
-        val newAccountName = accountName(context, info)
-        if (account.name != newAccountName) {
-            // no need to re-assign contacts to new account, because they will be deleted by contacts provider in any case
-            val future = accountManager.renameAccount(account, newAccountName, null, null)
-            account = future.result
-        }
-
-        // Update the account user data
-        accountManager.setAndVerifyUserData(account, USER_DATA_COLLECTION_ID, info.id.toString())
-        accountManager.setAndVerifyUserData(account, USER_DATA_URL, info.url.toString())
-
-        // Update force read only
-        if (forceReadOnly != null) {
-            val nowReadOnly = forceReadOnly || !info.privWriteContent || info.forceReadOnly
-            if (nowReadOnly != readOnly) {
-                logger.info("Address book now read-only = $nowReadOnly, updating contacts")
-
-                // update address book itself
-                readOnly = nowReadOnly
-
-                // update raw contacts
-                val rawContactValues = ContentValues(1)
-                rawContactValues.put(RawContacts.RAW_CONTACT_IS_READ_ONLY, if (nowReadOnly) 1 else 0)
-                provider!!.update(rawContactsSyncUri(), rawContactValues, null, null)
-
-                // update data rows
-                val dataValues = ContentValues(1)
-                dataValues.put(ContactsContract.Data.IS_READ_ONLY, if (nowReadOnly) 1 else 0)
-                provider!!.update(syncAdapterURI(ContactsContract.Data.CONTENT_URI), dataValues, null, null)
-
-                // update group rows
-                val groupValues = ContentValues(1)
-                groupValues.put(Groups.GROUP_IS_READ_ONLY, if (nowReadOnly) 1 else 0)
-                provider!!.update(groupsSyncUri(), groupValues, null, null)
-            }
-        }
-
-        // make sure it will still be synchronized when contacts are updated
-        updateSyncFrameworkSettings()
-    }
-
-    override fun deleteCollection(): Boolean {
-        val accountManager = AccountManager.get(context)
-        return accountManager.removeAccountExplicitly(account)
-    }
-
-
-    /**
-     * Updates the sync framework settings for this address book:
-     *
-     * - Contacts sync of this address book account shall be possible -> isSyncable = 1
-     * - When a contact is changed, a sync shall be initiated -> syncAutomatically = true
-     * - Remove unwanted sync framework periodic syncs created by setSyncAutomatically, as
-     * we use PeriodicSyncWorker for scheduled syncs
-     */
-    fun updateSyncFrameworkSettings() {
-        // Enable sync-ability
-        if (ContentResolver.getIsSyncable(account, ContactsContract.AUTHORITY) != 1)
-            ContentResolver.setIsSyncable(account, ContactsContract.AUTHORITY, 1)
-
-        // Enable content trigger
-        if (!ContentResolver.getSyncAutomatically(account, ContactsContract.AUTHORITY))
-            ContentResolver.setSyncAutomatically(account, ContactsContract.AUTHORITY, true)
-
-        // Remove periodic syncs (setSyncAutomatically also creates periodic syncs, which we don't want)
-        for (periodicSync in ContentResolver.getPeriodicSyncs(account, ContactsContract.AUTHORITY))
-            ContentResolver.removePeriodicSync(periodicSync.account, periodicSync.authority, periodicSync.extras)
-    }
-
-
-    /* operations on members (contacts/groups) */
-
-    override fun findByName(name: String): LocalAddress? {
-        val result = queryContacts("${AndroidContact.COLUMN_FILENAME}=?", arrayOf(name)).firstOrNull()
-        return if (includeGroups)
-            result ?: queryGroups("${AndroidGroup.COLUMN_FILENAME}=?", arrayOf(name)).firstOrNull()
-        else
-            result
-    }
-
-
-    /**
-     * Returns an array of local contacts/groups which have been deleted locally. (DELETED != 0).
-     * @throws RemoteException on content provider errors
-     */
-    override fun findDeleted() =
-            if (includeGroups)
-                findDeletedContacts() + findDeletedGroups()
-            else
-                findDeletedContacts()
-
-    fun findDeletedContacts() = queryContacts(RawContacts.DELETED, null)
-    fun findDeletedGroups() = queryGroups(Groups.DELETED, null)
-
-    /**
-     * Returns an array of local contacts/groups which have been changed locally (DIRTY != 0).
-     * @throws RemoteException on content provider errors
-     */
-    override fun findDirty() =
-            if (includeGroups)
-                findDirtyContacts() + findDirtyGroups()
-            else
-                findDirtyContacts()
-    fun findDirtyContacts() = queryContacts(RawContacts.DIRTY, null)
-    fun findDirtyGroups() = queryGroups(Groups.DIRTY, null)
-
-    override fun forgetETags() {
-        if (includeGroups) {
-            val values = ContentValues(1)
-            values.putNull(AndroidGroup.COLUMN_ETAG)
-            provider!!.update(groupsSyncUri(), values, null, null)
-        }
-        val values = ContentValues(1)
-        values.putNull(AndroidContact.COLUMN_ETAG)
-        provider!!.update(rawContactsSyncUri(), values, null, null)
-    }
-
-
-    fun getContactIdsByGroupMembership(groupId: Long): List<Long> {
-        val ids = LinkedList<Long>()
-        provider!!.query(syncAdapterURI(ContactsContract.Data.CONTENT_URI), arrayOf(GroupMembership.RAW_CONTACT_ID),
-            "(${GroupMembership.MIMETYPE}=? AND ${GroupMembership.GROUP_ROW_ID}=?)",
-            arrayOf(GroupMembership.CONTENT_ITEM_TYPE, groupId.toString()), null)?.use { cursor ->
-            while (cursor.moveToNext())
-                ids += cursor.getLong(0)
-        }
-        return ids
-    }
-
-    fun getContactUidFromId(contactId: Long): String? {
-        provider!!.query(rawContactsSyncUri(), arrayOf(AndroidContact.COLUMN_UID),
-            "${RawContacts._ID}=?", arrayOf(contactId.toString()), null)?.use { cursor ->
-            if (cursor.moveToNext())
-                return cursor.getString(0)
-        }
-        return null
-    }
-
-
-    /**
-     * Queries all contacts with DIRTY flag and checks whether their data checksum has changed, i.e.
-     * if they're "really dirty" (= data has changed, not only metadata, which is not hashed).
-     * The DIRTY flag is removed from contacts which are not "really dirty", i.e. from contacts
-     * whose contact data checksum has not changed.
-     * @return number of "really dirty" contacts
-     * @throws RemoteException on content provider errors
-     */
-    fun verifyDirty(): Int {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
-            throw IllegalStateException("verifyDirty() should not be called on Android != 7.0")
-
-        var reallyDirty = 0
-        for (contact in findDirtyContacts()) {
-            val lastHash = contact.getLastHashCode()
-            val currentHash = contact.dataHashCode()
-            if (lastHash == currentHash) {
-                // hash is code still the same, contact is not "really dirty" (only metadata been have changed)
-                logger.log(Level.FINE, "Contact data hash has not changed, resetting dirty flag", contact)
-                contact.resetDirty()
-            } else {
-                logger.log(Level.FINE, "Contact data has changed from hash $lastHash to $currentHash", contact)
-                reallyDirty++
-            }
-        }
-
-        if (includeGroups)
-            reallyDirty += findDirtyGroups().size
-
-        return reallyDirty
-    }
-
-
-    /* special group operations */
-
-    /**
-     * Finds the first group with the given title. If there is no group with this
-     * title, a new group is created.
-     * @param title title of the group to look for
-     * @return id of the group with given title
-     * @throws RemoteException on content provider errors
-     */
-    fun findOrCreateGroup(title: String): Long {
-        provider!!.query(syncAdapterURI(Groups.CONTENT_URI), arrayOf(Groups._ID),
-                "${Groups.TITLE}=?", arrayOf(title), null)?.use { cursor ->
-            if (cursor.moveToNext())
-                return cursor.getLong(0)
-        }
-
-        val values = ContentValues(1)
-        values.put(Groups.TITLE, title)
-        val uri = provider!!.insert(syncAdapterURI(Groups.CONTENT_URI), values) ?: throw RemoteException("Couldn't create contact group")
-        return ContentUris.parseId(uri)
-    }
-
-    fun removeEmptyGroups() {
-        // find groups without members
-        /** should be done using {@link Groups.SUMMARY_COUNT}, but it's not implemented in Android yet */
-        queryGroups(null, null).filter { it.getMembers().isEmpty() }.forEach { group ->
-            logger.log(Level.FINE, "Deleting group", group)
-            group.delete()
-        }
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/resource/LocalCalendar.kt

@@ -1,313 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.resource
-
-import android.accounts.Account
-import android.content.ContentProviderClient
-import android.content.ContentUris
-import android.content.ContentValues
-import android.net.Uri
-import android.provider.CalendarContract.Calendars
-import android.provider.CalendarContract.Events
-import at.bitfire.davdroid.Constants
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.SyncState
-import at.bitfire.davdroid.util.DavUtils.lastSegment
-import at.bitfire.ical4android.AndroidCalendar
-import at.bitfire.ical4android.AndroidCalendarFactory
-import at.bitfire.ical4android.BatchOperation
-import at.bitfire.ical4android.util.DateUtils
-import at.bitfire.ical4android.util.MiscUtils.asSyncAdapter
-import java.util.LinkedList
-import java.util.logging.Level
-import java.util.logging.Logger
-
-/**
- * Application-specific subclass of [AndroidCalendar] for local calendars.
- *
- * [Calendars.NAME] is used to store the calendar URL.
- */
-class LocalCalendar private constructor(
-    account: Account,
-    provider: ContentProviderClient,
-    id: Long
-): AndroidCalendar<LocalEvent>(account, provider, LocalEvent.Factory, id), LocalCollection<LocalEvent> {
-
-    companion object {
-
-        private const val COLUMN_SYNC_STATE = Calendars.CAL_SYNC1
-
-        private val logger: Logger
-            get() = Logger.getGlobal()
-
-        fun create(account: Account, provider: ContentProviderClient, info: Collection): Uri {
-            // If the collection doesn't have a color, use a default color.
-            if (info.color != null)
-                info.color = Constants.DAVDROID_GREEN_RGBA
-
-            val values = valuesFromCollectionInfo(info, withColor = true)
-
-            // ACCOUNT_NAME and ACCOUNT_TYPE are required (see docs)! If it's missing, other apps will crash.
-            values.put(Calendars.ACCOUNT_NAME, account.name)
-            values.put(Calendars.ACCOUNT_TYPE, account.type)
-
-            // Email address for scheduling. Used by the calendar provider to determine whether the
-            // user is ORGANIZER/ATTENDEE for a certain event.
-            values.put(Calendars.OWNER_ACCOUNT, account.name)
-
-            // flag as visible & synchronizable at creation, might be changed by user at any time
-            values.put(Calendars.VISIBLE, 1)
-            values.put(Calendars.SYNC_EVENTS, 1)
-            return create(account, provider, values)
-        }
-
-        private fun valuesFromCollectionInfo(info: Collection, withColor: Boolean): ContentValues {
-            val values = ContentValues()
-            values.put(Calendars.NAME, info.url.toString())
-            values.put(Calendars.CALENDAR_DISPLAY_NAME,
-                if (info.displayName.isNullOrBlank()) info.url.lastSegment else info.displayName)
-
-            if (withColor && info.color != null)
-                values.put(Calendars.CALENDAR_COLOR, info.color)
-
-            if (info.privWriteContent && !info.forceReadOnly) {
-                values.put(Calendars.CALENDAR_ACCESS_LEVEL, Calendars.CAL_ACCESS_OWNER)
-                values.put(Calendars.CAN_MODIFY_TIME_ZONE, 1)
-                values.put(Calendars.CAN_ORGANIZER_RESPOND, 1)
-            } else
-                values.put(Calendars.CALENDAR_ACCESS_LEVEL, Calendars.CAL_ACCESS_READ)
-
-            info.timezone?.let { tzData ->
-                try {
-                    val timeZone = DateUtils.parseVTimeZone(tzData)
-                    timeZone.timeZoneId?.let { tzId ->
-                        values.put(Calendars.CALENDAR_TIME_ZONE, DateUtils.findAndroidTimezoneID(tzId.value))
-                    }
-                } catch(e: IllegalArgumentException) {
-                    logger.log(Level.WARNING, "Couldn't parse calendar default time zone", e)
-                }
-            }
-
-            // add base values for Calendars
-            values.putAll(calendarBaseValues)
-
-            return values
-        }
-
-    }
-
-    override val collectionUrl: String?
-        get() = name
-
-    override val tag: String
-        get() = "events-${account.name}-$id"
-
-    override val title: String
-        get() = displayName ?: id.toString()
-
-    private var accessLevel: Int = Calendars.CAL_ACCESS_OWNER   // assume full access if not specified
-    override val readOnly
-        get() = accessLevel <= Calendars.CAL_ACCESS_READ
-
-    override fun deleteCollection(): Boolean = delete()
-
-    override var lastSyncState: SyncState?
-        get() = provider.query(calendarSyncURI(), arrayOf(COLUMN_SYNC_STATE), null, null, null)?.use { cursor ->
-                    if (cursor.moveToNext())
-                        return SyncState.fromString(cursor.getString(0))
-                    else
-                        null
-                }
-        set(state) {
-            val values = ContentValues(1)
-            values.put(COLUMN_SYNC_STATE, state.toString())
-            provider.update(calendarSyncURI(), values, null, null)
-        }
-
-
-    override fun populate(info: ContentValues) {
-        super.populate(info)
-        accessLevel = info.getAsInteger(Calendars.CALENDAR_ACCESS_LEVEL) ?: Calendars.CAL_ACCESS_OWNER
-    }
-
-    fun update(info: Collection, updateColor: Boolean) =
-        update(valuesFromCollectionInfo(info, updateColor))
-
-
-    override fun findDeleted() =
-        queryEvents("${Events.DELETED} AND ${Events.ORIGINAL_ID} IS NULL", null)
-
-    override fun findDirty(): List<LocalEvent> {
-        val dirty = LinkedList<LocalEvent>()
-
-        /*
-         * RFC 5545 3.8.7.4. Sequence Number
-         * When a calendar component is created, its sequence number is 0. It is monotonically incremented by the "Organizer's"
-         * CUA each time the "Organizer" makes a significant revision to the calendar component.
-         */
-        for (localEvent in queryEvents("${Events.DIRTY} AND ${Events.ORIGINAL_ID} IS NULL", null)) {
-            try {
-                val event = requireNotNull(localEvent.event)
-
-                val nonGroupScheduled = event.attendees.isEmpty()
-                val weAreOrganizer = localEvent.weAreOrganizer
-
-                val sequence = event.sequence
-                if (sequence == null)
-                    // sequence has not been assigned yet (i.e. this event was just locally created)
-                    event.sequence = 0
-                else if (nonGroupScheduled || weAreOrganizer)   // increase sequence
-                    event.sequence = sequence + 1
-
-            } catch(e: Exception) {
-                logger.log(Level.WARNING, "Couldn't check/increase sequence", e)
-            }
-            dirty += localEvent
-        }
-
-        return dirty
-    }
-
-    override fun findByName(name: String) =
-            queryEvents("${Events._SYNC_ID}=?", arrayOf(name)).firstOrNull()
-
-
-    override fun markNotDirty(flags: Int): Int {
-        val values = ContentValues(1)
-        values.put(LocalEvent.COLUMN_FLAGS, flags)
-        return provider.update(Events.CONTENT_URI.asSyncAdapter(account), values,
-                "${Events.CALENDAR_ID}=? AND NOT ${Events.DIRTY} AND ${Events.ORIGINAL_ID} IS NULL",
-                arrayOf(id.toString()))
-    }
-
-    override fun removeNotDirtyMarked(flags: Int): Int {
-        var deleted = 0
-        // list all non-dirty events with the given flags and delete every row + its exceptions
-        provider.query(Events.CONTENT_URI.asSyncAdapter(account), arrayOf(Events._ID),
-                "${Events.CALENDAR_ID}=? AND NOT ${Events.DIRTY} AND ${Events.ORIGINAL_ID} IS NULL AND ${LocalEvent.COLUMN_FLAGS}=?",
-                arrayOf(id.toString(), flags.toString()), null)?.use { cursor ->
-            val batch = BatchOperation(provider)
-            while (cursor.moveToNext()) {
-                val id = cursor.getLong(0)
-                // delete event and possible exceptions (content provider doesn't delete exceptions itself)
-                batch.enqueue(BatchOperation.CpoBuilder
-                        .newDelete(Events.CONTENT_URI.asSyncAdapter(account))
-                        .withSelection("${Events._ID}=? OR ${Events.ORIGINAL_ID}=?", arrayOf(id.toString(), id.toString())))
-            }
-            deleted = batch.commit()
-        }
-        return deleted
-    }
-
-    override fun forgetETags() {
-        val values = ContentValues(1)
-        values.putNull(LocalEvent.COLUMN_ETAG)
-        provider.update(Events.CONTENT_URI.asSyncAdapter(account), values, "${Events.CALENDAR_ID}=?",
-                arrayOf(id.toString()))
-    }
-
-
-    fun processDirtyExceptions() {
-        // process deleted exceptions
-        logger.info("Processing deleted exceptions")
-        provider.query(
-                Events.CONTENT_URI.asSyncAdapter(account),
-                arrayOf(Events._ID, Events.ORIGINAL_ID, LocalEvent.COLUMN_SEQUENCE),
-                "${Events.CALENDAR_ID}=? AND ${Events.DELETED} AND ${Events.ORIGINAL_ID} IS NOT NULL",
-                arrayOf(id.toString()), null)?.use { cursor ->
-            while (cursor.moveToNext()) {
-                logger.fine("Found deleted exception, removing and re-scheduling original event (if available)")
-                val id = cursor.getLong(0)             // can't be null (by definition)
-                val originalID = cursor.getLong(1)     // can't be null (by query)
-
-                val batch = BatchOperation(provider)
-
-                // get original event's SEQUENCE
-                provider.query(
-                        ContentUris.withAppendedId(Events.CONTENT_URI, originalID).asSyncAdapter(account),
-                        arrayOf(LocalEvent.COLUMN_SEQUENCE),
-                        null, null, null)?.use { cursor2 ->
-                    if (cursor2.moveToNext()) {
-                        // original event is available
-                        val originalSequence = if (cursor2.isNull(0)) 0 else cursor2.getInt(0)
-
-                        // re-schedule original event and set it to DIRTY
-                        batch.enqueue(BatchOperation.CpoBuilder
-                                .newUpdate(ContentUris.withAppendedId(Events.CONTENT_URI, originalID).asSyncAdapter(account))
-                                .withValue(LocalEvent.COLUMN_SEQUENCE, originalSequence + 1)
-                                .withValue(Events.DIRTY, 1))
-                    }
-                }
-
-                // completely remove deleted exception
-                batch.enqueue(BatchOperation.CpoBuilder.newDelete(ContentUris.withAppendedId(Events.CONTENT_URI, id).asSyncAdapter(account)))
-                batch.commit()
-            }
-        }
-
-        // process dirty exceptions
-        logger.info("Processing dirty exceptions")
-        provider.query(
-                Events.CONTENT_URI.asSyncAdapter(account),
-                arrayOf(Events._ID, Events.ORIGINAL_ID, LocalEvent.COLUMN_SEQUENCE),
-                "${Events.CALENDAR_ID}=? AND ${Events.DIRTY} AND ${Events.ORIGINAL_ID} IS NOT NULL",
-                arrayOf(id.toString()), null)?.use { cursor ->
-            while (cursor.moveToNext()) {
-                logger.fine("Found dirty exception, increasing SEQUENCE to re-schedule")
-                val id = cursor.getLong(0)             // can't be null (by definition)
-                val originalID = cursor.getLong(1)     // can't be null (by query)
-                val sequence = if (cursor.isNull(2)) 0 else cursor.getInt(2)
-
-                val batch = BatchOperation(provider)
-                // original event to DIRTY
-                batch.enqueue(BatchOperation.CpoBuilder
-                        .newUpdate(ContentUris.withAppendedId(Events.CONTENT_URI, originalID).asSyncAdapter(account))
-                        .withValue(Events.DIRTY, 1))
-                // increase SEQUENCE and set DIRTY to 0
-                batch.enqueue(BatchOperation.CpoBuilder
-                        .newUpdate(ContentUris.withAppendedId(Events.CONTENT_URI, id).asSyncAdapter(account))
-                        .withValue(LocalEvent.COLUMN_SEQUENCE, sequence + 1)
-                        .withValue(Events.DIRTY, 0))
-                batch.commit()
-            }
-        }
-    }
-
-    /**
-     * Marks dirty events (which are not already marked as deleted) which got no valid instances as "deleted"
-     *
-     * @return number of affected events
-     */
-    fun deleteDirtyEventsWithoutInstances() {
-        provider.query(
-            Events.CONTENT_URI.asSyncAdapter(account),
-            arrayOf(Events._ID),
-            "${Events.DIRTY} AND NOT ${Events.DELETED} AND ${Events.ORIGINAL_ID} IS NULL",    // Get dirty main events (and no exception events)
-            null, null
-        )?.use { cursor ->
-            while (cursor.moveToNext()) {
-                val eventID = cursor.getLong(0)
-
-                // get number of instances
-                val numEventInstances = LocalEvent.numInstances(provider, account, eventID)
-
-                // delete event if there are no instances
-                if (numEventInstances == 0) {
-                    logger.info("Marking event #$eventID without instances as deleted")
-                    LocalEvent.markAsDeleted(provider, account, eventID)
-                }
-            }
-        }
-    }
-
-
-    object Factory: AndroidCalendarFactory<LocalCalendar> {
-
-        override fun newInstance(account: Account, provider: ContentProviderClient, id: Long) =
-            LocalCalendar(account, provider, id)
-
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/resource/LocalContact.kt

@@ -1,253 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.resource
-
-import android.content.ContentValues
-import android.os.Build
-import android.os.RemoteException
-import android.provider.ContactsContract
-import android.provider.ContactsContract.CommonDataKinds.GroupMembership
-import android.provider.ContactsContract.RawContacts.Data
-import at.bitfire.davdroid.BuildConfig
-import at.bitfire.davdroid.resource.contactrow.CachedGroupMembershipHandler
-import at.bitfire.davdroid.resource.contactrow.GroupMembershipBuilder
-import at.bitfire.davdroid.resource.contactrow.GroupMembershipHandler
-import at.bitfire.davdroid.resource.contactrow.UnknownPropertiesBuilder
-import at.bitfire.davdroid.resource.contactrow.UnknownPropertiesHandler
-import at.bitfire.vcard4android.AndroidAddressBook
-import at.bitfire.vcard4android.AndroidContact
-import at.bitfire.vcard4android.AndroidContactFactory
-import at.bitfire.vcard4android.BatchOperation
-import at.bitfire.vcard4android.CachedGroupMembership
-import at.bitfire.vcard4android.Contact
-import ezvcard.Ezvcard
-import java.io.FileNotFoundException
-import java.util.UUID
-import java.util.logging.Logger
-
-class LocalContact: AndroidContact, LocalAddress {
-
-    companion object {
-
-        init {
-            Contact.productID = "+//IDN bitfire.at//DAVx5/${BuildConfig.VERSION_NAME} ez-vcard/" + Ezvcard.VERSION
-        }
-
-        const val COLUMN_FLAGS = ContactsContract.RawContacts.SYNC4
-        const val COLUMN_HASHCODE = ContactsContract.RawContacts.SYNC3
-    }
-
-    private val logger: Logger = Logger.getGlobal()
-
-    override val addressBook: LocalAddressBook
-        get() = super.addressBook as LocalAddressBook
-
-    internal val cachedGroupMemberships = HashSet<Long>()
-    internal val groupMemberships = HashSet<Long>()
-
-    override var scheduleTag: String?
-        get() = null
-        set(_) = throw NotImplementedError()
-
-    override var flags: Int = 0
-
-
-    constructor(addressBook: LocalAddressBook, values: ContentValues): super(addressBook, values) {
-        flags = values.getAsInteger(COLUMN_FLAGS) ?: 0
-    }
-
-    constructor(addressBook: LocalAddressBook, contact: Contact, fileName: String?, eTag: String?, _flags: Int): super(addressBook, contact, fileName, eTag) {
-        flags = _flags
-    }
-
-    init {
-        processor.registerHandler(CachedGroupMembershipHandler(this))
-        processor.registerHandler(GroupMembershipHandler(this))
-        processor.registerHandler(UnknownPropertiesHandler)
-        processor.registerBuilderFactory(GroupMembershipBuilder.Factory(addressBook))
-        processor.registerBuilderFactory(UnknownPropertiesBuilder.Factory)
-    }
-
-
-    override fun prepareForUpload(): String {
-        val contact = getContact()
-        val uid: String = contact.uid ?: run {
-            // generate new UID
-            val newUid = UUID.randomUUID().toString()
-
-            // update in contacts provider
-            val values = ContentValues(1)
-            values.put(COLUMN_UID, newUid)
-            addressBook.provider!!.update(rawContactSyncURI(), values, null, null)
-
-            // update this event
-            contact.uid = newUid
-
-            newUid
-        }
-
-        return "$uid.vcf"
-    }
-
-    override fun clearDirty(fileName: String?, eTag: String?, scheduleTag: String?) {
-        if (scheduleTag != null)
-            throw IllegalArgumentException("Contacts must not have a Schedule-Tag")
-
-        val values = ContentValues(4)
-        if (fileName != null)
-            values.put(COLUMN_FILENAME, fileName)
-        values.put(COLUMN_ETAG, eTag)
-        values.put(ContactsContract.RawContacts.DIRTY, 0)
-
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.O) {
-            // workaround for Android 7 which sets DIRTY flag when only meta-data is changed
-            val hashCode = dataHashCode()
-            values.put(COLUMN_HASHCODE, hashCode)
-            logger.finer("Clearing dirty flag with eTag = $eTag, contact hash = $hashCode")
-        }
-
-        addressBook.provider!!.update(rawContactSyncURI(), values, null, null)
-
-        if (fileName != null)
-            this.fileName = fileName
-        this.eTag = eTag
-    }
-
-    override fun resetDeleted() {
-        val values = ContentValues(1)
-        values.put(ContactsContract.Groups.DELETED, 0)
-        addressBook.provider!!.update(rawContactSyncURI(), values, null, null)
-    }
-
-    fun resetDirty() {
-        val values = ContentValues(1)
-        values.put(ContactsContract.RawContacts.DIRTY, 0)
-        addressBook.provider!!.update(rawContactSyncURI(), values, null, null)
-    }
-
-    override fun updateFlags(flags: Int) {
-        val values = ContentValues(1)
-        values.put(COLUMN_FLAGS, flags)
-        addressBook.provider!!.update(rawContactSyncURI(), values, null, null)
-
-        this.flags = flags
-    }
-
-
-    /**
-     * Calculates a hash code from the contact's data (VCard) and group memberships.
-     * Attention: re-reads {@link #contact} from the database, discarding all changes in memory
-     * @return hash code of contact data (including group memberships)
-     */
-    internal fun dataHashCode(): Int {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
-            throw IllegalStateException("dataHashCode() should not be called on Android != 7")
-
-        // reset contact so that getContact() reads from database
-        _contact = null
-
-        // groupMemberships is filled by getContact()
-        val dataHash = getContact().hashCode()
-        val groupHash = groupMemberships.hashCode()
-        logger.finest("Calculated data hash = $dataHash, group memberships hash = $groupHash")
-        return dataHash xor groupHash
-    }
-
-    fun updateHashCode(batch: BatchOperation?) {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
-            throw IllegalStateException("updateHashCode() should not be called on Android != 7")
-
-        val hashCode = dataHashCode()
-        logger.fine("Storing contact hash = $hashCode")
-
-        if (batch == null) {
-            val values = ContentValues(1)
-            values.put(COLUMN_HASHCODE, hashCode)
-            addressBook.provider!!.update(rawContactSyncURI(), values, null, null)
-        } else
-            batch.enqueue(BatchOperation.CpoBuilder
-                    .newUpdate(rawContactSyncURI())
-                    .withValue(COLUMN_HASHCODE, hashCode))
-    }
-
-    fun getLastHashCode(): Int {
-        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)
-            throw IllegalStateException("getLastHashCode() should not be called on Android != 7")
-
-        addressBook.provider!!.query(rawContactSyncURI(), arrayOf(COLUMN_HASHCODE), null, null, null)?.use { c ->
-            if (c.moveToNext() && !c.isNull(0))
-                return c.getInt(0)
-        }
-        return 0
-    }
-
-
-    fun addToGroup(batch: BatchOperation, groupID: Long) {
-        batch.enqueue(BatchOperation.CpoBuilder
-                .newInsert(dataSyncURI())
-                .withValue(GroupMembership.MIMETYPE, GroupMembership.CONTENT_ITEM_TYPE)
-                .withValue(GroupMembership.RAW_CONTACT_ID, id)
-                .withValue(GroupMembership.GROUP_ROW_ID, groupID))
-        groupMemberships += groupID
-
-        batch.enqueue(BatchOperation.CpoBuilder
-                .newInsert(dataSyncURI())
-                .withValue(CachedGroupMembership.MIMETYPE, CachedGroupMembership.CONTENT_ITEM_TYPE)
-                .withValue(CachedGroupMembership.RAW_CONTACT_ID, id)
-                .withValue(CachedGroupMembership.GROUP_ID, groupID)
-        )
-        cachedGroupMemberships += groupID
-    }
-
-    fun removeGroupMemberships(batch: BatchOperation) {
-        batch.enqueue(BatchOperation.CpoBuilder
-                .newDelete(dataSyncURI())
-                .withSelection(
-                        "${Data.RAW_CONTACT_ID}=? AND ${Data.MIMETYPE} IN (?,?)",
-                        arrayOf(id.toString(), GroupMembership.CONTENT_ITEM_TYPE, CachedGroupMembership.CONTENT_ITEM_TYPE)
-                ))
-        groupMemberships.clear()
-        cachedGroupMemberships.clear()
-    }
-
-    /**
-     * Returns the IDs of all groups the contact was member of (cached memberships).
-     * Cached memberships are kept in sync with memberships by DAVx5 and are used to determine
-     * whether a membership has been deleted/added when a raw contact is dirty.
-     * @return set of {@link GroupMembership#GROUP_ROW_ID} (may be empty)
-     * @throws FileNotFoundException if the current contact can't be found
-     * @throws RemoteException on contacts provider errors
-     */
-    fun getCachedGroupMemberships(): Set<Long> {
-        getContact()
-        return cachedGroupMemberships
-    }
-
-    /**
-     * Returns the IDs of all groups the contact is member of.
-     * @return set of {@link GroupMembership#GROUP_ROW_ID}s (may be empty)
-     * @throws FileNotFoundException if the current contact can't be found
-     * @throws RemoteException on contacts provider errors
-     */
-    fun getGroupMemberships(): Set<Long> {
-        getContact()
-        return groupMemberships
-    }
-
-
-    // data rows
-    override fun buildContact(builder: BatchOperation.CpoBuilder, update: Boolean) {
-        builder.withValue(COLUMN_FLAGS, flags)
-        super.buildContact(builder, update)
-    }
-
-    // factory
-
-    object Factory: AndroidContactFactory<LocalContact> {
-        override fun fromProvider(addressBook: AndroidAddressBook<LocalContact, *>, values: ContentValues) =
-                LocalContact(addressBook as LocalAddressBook, values)
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/resource/LocalEvent.kt

@@ -1,270 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.resource
-
-import android.accounts.Account
-import android.content.ContentProviderClient
-import android.content.ContentUris
-import android.content.ContentValues
-import android.provider.CalendarContract
-import android.provider.CalendarContract.Events
-import at.bitfire.davdroid.BuildConfig
-import at.bitfire.ical4android.AndroidCalendar
-import at.bitfire.ical4android.AndroidEvent
-import at.bitfire.ical4android.AndroidEventFactory
-import at.bitfire.ical4android.BatchOperation
-import at.bitfire.ical4android.Event
-import at.bitfire.ical4android.ICalendar
-import at.bitfire.ical4android.Ical4Android
-import at.bitfire.ical4android.util.MiscUtils.asSyncAdapter
-import net.fortuna.ical4j.model.property.ProdId
-import java.util.UUID
-class LocalEvent: AndroidEvent, LocalResource<Event> {
-
-    companion object {
-        init {
-            ICalendar.prodId = ProdId("DAVx5/${BuildConfig.VERSION_NAME} ical4j/" + Ical4Android.ical4jVersion)
-        }
-
-        const val COLUMN_ETAG = Events.SYNC_DATA1
-        const val COLUMN_FLAGS = Events.SYNC_DATA2
-        const val COLUMN_SEQUENCE = Events.SYNC_DATA3
-        const val COLUMN_SCHEDULE_TAG = Events.SYNC_DATA4
-
-        /**
-         * Marks the event as deleted
-         * @param eventID
-         */
-        fun markAsDeleted(provider: ContentProviderClient, account: Account, eventID: Long) {
-            provider.update(
-                ContentUris.withAppendedId(
-                    Events.CONTENT_URI,
-                    eventID
-                ).asSyncAdapter(account),
-                ContentValues(1).apply {
-                    put(Events.DELETED, 1)
-                },
-                null,null
-            )
-        }
-
-
-        /**
-         * Finds the amount of direct instances this event has (without exceptions); used by [numInstances]
-         * to find the number of instances of exceptions.
-         *
-         * The number of returned instances may vary with the Android version.
-         *
-         * @return number of direct event instances (not counting instances of exceptions); *null* if
-         * the number can't be determined or if the event has no last date (recurring event without last instance)
-         */
-        fun numDirectInstances(provider: ContentProviderClient, account: Account, eventID: Long): Int? {
-            // query event to get first and last instance
-            var first: Long? = null
-            var last: Long? = null
-            provider.query(
-                ContentUris.withAppendedId(
-                    Events.CONTENT_URI,
-                    eventID
-                ),
-                arrayOf(Events.DTSTART, Events.LAST_DATE), null, null, null
-            )?.use { cursor ->
-                cursor.moveToNext()
-                if (!cursor.isNull(0))
-                    first = cursor.getLong(0)
-                if (!cursor.isNull(1))
-                    last = cursor.getLong(1)
-            }
-            // if this event doesn't have a last occurence, it's endless and always has instances
-            if (first == null || last == null)
-                return null
-
-            /* We can't use Long.MIN_VALUE and Long.MAX_VALUE because Android generates the instances
-             on the fly and it doesn't accept those values. So we use the first/last actual occurence
-             of the event (calculated by Android). */
-            val instancesUri = CalendarContract.Instances.CONTENT_URI.asSyncAdapter(account)
-                .buildUpon()
-                .appendPath(first.toString())       // begin timestamp
-                .appendPath(last.toString())        // end timestamp
-                .build()
-
-            var numInstances = 0
-            provider.query(
-                instancesUri, null,
-                "${CalendarContract.Instances.EVENT_ID}=?", arrayOf(eventID.toString()),
-                null
-            )?.use { cursor ->
-                numInstances += cursor.count
-            }
-            return numInstances
-        }
-
-        /**
-         * Finds the total number of instances this event has (including instances of exceptions)
-         *
-         * The number of returned instances may vary with the Android version.
-         *
-         * @return number of direct event instances (not counting instances of exceptions); *null* if
-         * the number can't be determined or if the event has no last date (recurring event without last instance)
-         */
-        fun numInstances(provider: ContentProviderClient, account: Account, eventID: Long): Int? {
-            // num instances of the main event
-            var numInstances = numDirectInstances(provider, account, eventID) ?: return null
-
-            // add the number of instances of every main event's exception
-            provider.query(
-                Events.CONTENT_URI,
-                arrayOf(Events._ID),
-                "${Events.ORIGINAL_ID}=?", // get exception events of the main event
-                arrayOf("$eventID"), null
-            )?.use { exceptionsEventCursor ->
-                while (exceptionsEventCursor.moveToNext()) {
-                    val exceptionEventID = exceptionsEventCursor.getLong(0)
-                    val exceptionInstances = numDirectInstances(provider, account, exceptionEventID)
-
-                    if (exceptionInstances == null)
-                        // number of instances of exception can't be determined; so the total number of instances is also unclear
-                        return null
-
-                    numInstances += exceptionInstances
-                }
-            }
-            return numInstances
-        }
-
-    }
-
-    override var fileName: String? = null
-        private set
-
-    override var eTag: String? = null
-    override var scheduleTag: String? = null
-
-    override var flags: Int = 0
-        private set
-
-    var weAreOrganizer = false
-        private set
-
-
-    constructor(calendar: AndroidCalendar<*>, event: Event, fileName: String?, eTag: String?, scheduleTag: String?, flags: Int): super(calendar, event) {
-        this.fileName = fileName
-        this.eTag = eTag
-        this.scheduleTag = scheduleTag
-        this.flags = flags
-    }
-
-    private constructor(calendar: AndroidCalendar<*>, values: ContentValues): super(calendar, values) {
-        fileName = values.getAsString(Events._SYNC_ID)
-        eTag = values.getAsString(COLUMN_ETAG)
-        scheduleTag = values.getAsString(COLUMN_SCHEDULE_TAG)
-        flags = values.getAsInteger(COLUMN_FLAGS) ?: 0
-    }
-
-    override fun populateEvent(row: ContentValues, groupScheduled: Boolean) {
-        val event = requireNotNull(event)
-        event.sequence = row.getAsInteger(COLUMN_SEQUENCE)
-
-        val isOrganizer = row.getAsInteger(Events.IS_ORGANIZER)
-        weAreOrganizer = isOrganizer != null && isOrganizer != 0
-
-        super.populateEvent(row, groupScheduled)
-    }
-
-    override fun buildEvent(recurrence: Event?, builder: BatchOperation.CpoBuilder) {
-        val event = requireNotNull(event)
-
-        val buildException = recurrence != null
-        val eventToBuild = recurrence ?: event
-
-        builder .withValue(COLUMN_SEQUENCE, eventToBuild.sequence)
-                .withValue(Events.DIRTY, 0)
-                .withValue(Events.DELETED, 0)
-                .withValue(COLUMN_FLAGS, flags)
-
-        if (buildException)
-            builder .withValue(Events.ORIGINAL_SYNC_ID, fileName)
-        else
-            builder .withValue(Events._SYNC_ID, fileName)
-                    .withValue(COLUMN_ETAG, eTag)
-                    .withValue(COLUMN_SCHEDULE_TAG, scheduleTag)
-
-        super.buildEvent(recurrence, builder)
-    }
-
-
-    /**
-     * Creates and sets a new UID in the calendar provider, if no UID is already set.
-     * It also returns the desired file name for the event for further processing in the sync algorithm.
-     *
-     * @return file name to use at upload
-     */
-    override fun prepareForUpload(): String {
-        // make sure that UID is set
-        val uid: String = event!!.uid ?: run {
-            // generate new UID
-            val newUid = UUID.randomUUID().toString()
-
-            // update in calendar provider
-            val values = ContentValues(1)
-            values.put(Events.UID_2445, newUid)
-            calendar.provider.update(eventSyncURI(), values, null, null)
-
-            // update this event
-            event?.uid = newUid
-
-            newUid
-        }
-
-        val uidIsGoodFilename = uid.all { char ->
-            // see RFC 2396 2.2
-            char.isLetterOrDigit() || arrayOf(          // allow letters and digits
-                ';',':','@','&','=','+','$',',',        // allow reserved characters except '/' and '?'
-                '-','_','.','!','~','*','\'','(',')'    // allow unreserved characters
-            ).contains(char)
-        }
-        return if (uidIsGoodFilename)
-            "$uid.ics"                      // use UID as file name
-        else
-            "${UUID.randomUUID()}.ics"      // UID would be dangerous as file name, use random UUID instead
-    }
-
-
-    override fun clearDirty(fileName: String?, eTag: String?, scheduleTag: String?) {
-        val values = ContentValues(5)
-        if (fileName != null)
-            values.put(Events._SYNC_ID, fileName)
-        values.put(COLUMN_ETAG, eTag)
-        values.put(COLUMN_SCHEDULE_TAG, scheduleTag)
-        values.put(COLUMN_SEQUENCE, event!!.sequence)
-        values.put(Events.DIRTY, 0)
-        calendar.provider.update(eventSyncURI(), values, null, null)
-
-        if (fileName != null)
-            this.fileName = fileName
-        this.eTag = eTag
-        this.scheduleTag = scheduleTag
-    }
-
-    override fun updateFlags(flags: Int) {
-        val values = ContentValues(1)
-        values.put(COLUMN_FLAGS, flags)
-        calendar.provider.update(eventSyncURI(), values, null, null)
-
-        this.flags = flags
-    }
-
-    override fun resetDeleted() {
-        val values = ContentValues(1).apply { put(Events.DELETED, 0) }
-        calendar.provider.update(eventSyncURI(), values, null, null)
-    }
-
-    object Factory: AndroidEventFactory<LocalEvent> {
-        override fun fromProvider(calendar: AndroidCalendar<*>, values: ContentValues) =
-                LocalEvent(calendar, values)
-    }
-
-}
-

app/src/main/kotlin/at/bitfire/davdroid/resource/LocalJtxCollection.kt

@@ -1,124 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.resource
-
-import android.accounts.Account
-import android.content.ContentProviderClient
-import android.content.ContentValues
-import android.net.Uri
-import at.bitfire.davdroid.Constants
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.Principal
-import at.bitfire.davdroid.db.SyncState
-import at.bitfire.davdroid.util.DavUtils.lastSegment
-import at.bitfire.ical4android.JtxCollection
-import at.bitfire.ical4android.JtxCollectionFactory
-import at.bitfire.ical4android.JtxICalObject
-import at.techbee.jtx.JtxContract
-import java.util.logging.Logger
-
-class LocalJtxCollection(account: Account, client: ContentProviderClient, id: Long):
-    JtxCollection<JtxICalObject>(account, client, LocalJtxICalObject.Factory, id),
-    LocalCollection<LocalJtxICalObject>{
-
-    companion object {
-
-        fun create(account: Account, client: ContentProviderClient, info: Collection, owner: Principal?): Uri {
-            // If the collection doesn't have a color, use a default color.
-            if (info.color != null)
-                info.color = Constants.DAVDROID_GREEN_RGBA
-
-            val values = valuesFromCollection(info, account, owner, withColor = true)
-
-            return create(account, client, values)
-        }
-
-        fun valuesFromCollection(info: Collection, account: Account, owner: Principal?, withColor: Boolean) =
-            ContentValues().apply {
-                put(JtxContract.JtxCollection.URL, info.url.toString())
-                put(
-                    JtxContract.JtxCollection.DISPLAYNAME,
-                    info.displayName ?: info.url.lastSegment
-                )
-                put(JtxContract.JtxCollection.DESCRIPTION, info.description)
-                if (owner != null)
-                    put(JtxContract.JtxCollection.OWNER, owner.url.toString())
-                else
-                    Logger.getGlobal().warning("No collection owner given. Will create jtx collection without owner")
-                put(JtxContract.JtxCollection.OWNER_DISPLAYNAME, owner?.displayName)
-                if (withColor && info.color != null)
-                    put(JtxContract.JtxCollection.COLOR, info.color)
-                put(JtxContract.JtxCollection.SUPPORTSVEVENT, info.supportsVEVENT)
-                put(JtxContract.JtxCollection.SUPPORTSVJOURNAL, info.supportsVJOURNAL)
-                put(JtxContract.JtxCollection.SUPPORTSVTODO, info.supportsVTODO)
-                put(JtxContract.JtxCollection.ACCOUNT_NAME, account.name)
-                put(JtxContract.JtxCollection.ACCOUNT_TYPE, account.type)
-                put(JtxContract.JtxCollection.READONLY, info.forceReadOnly || !info.privWriteContent)
-            }
-    }
-
-    override val readOnly: Boolean
-        get() = throw NotImplementedError()
-
-    override fun deleteCollection(): Boolean = delete()
-
-    override val tag: String
-        get() =  "jtx-${account.name}-$id"
-    override val collectionUrl: String?
-        get() = url
-    override val title: String
-        get() = displayname ?: id.toString()
-    override var lastSyncState: SyncState?
-        get() = SyncState.fromString(syncstate)
-        set(value) { syncstate = value.toString() }
-
-    fun updateCollection(info: Collection, owner: Principal?, updateColor: Boolean) {
-        val values = valuesFromCollection(info, account, owner, updateColor)
-        update(values)
-    }
-
-    override fun findDeleted(): List<LocalJtxICalObject> {
-        val values = queryDeletedICalObjects()
-        val localJtxICalObjects = mutableListOf<LocalJtxICalObject>()
-        values.forEach {
-            localJtxICalObjects.add(LocalJtxICalObject.Factory.fromProvider(this, it))
-        }
-        return localJtxICalObjects
-    }
-
-    override fun findDirty(): List<LocalJtxICalObject> {
-        val values = queryDirtyICalObjects()
-        val localJtxICalObjects = mutableListOf<LocalJtxICalObject>()
-        values.forEach {
-            localJtxICalObjects.add(LocalJtxICalObject.Factory.fromProvider(this, it))
-        }
-        return localJtxICalObjects
-    }
-
-    override fun findByName(name: String): LocalJtxICalObject? {
-        val values = queryByFilename(name) ?: return null
-        return LocalJtxICalObject.Factory.fromProvider(this, values)
-    }
-
-    /**
-     * Finds and returns a recurring instance of a [LocalJtxICalObject]
-     */
-    fun findRecurring(uid: String, recurid: String, dtstart: Long): LocalJtxICalObject? {
-        val values = queryRecur(uid, recurid, dtstart) ?: return null
-        return LocalJtxICalObject.Factory.fromProvider(this, values)
-    }
-
-    override fun markNotDirty(flags: Int)= updateSetFlags(flags)
-
-    override fun removeNotDirtyMarked(flags: Int) = deleteByFlags(flags)
-
-    override fun forgetETags() = updateSetETag(null)
-
-
-    object Factory: JtxCollectionFactory<LocalJtxCollection> {
-        override fun newInstance(account: Account, client: ContentProviderClient, id: Long) = LocalJtxCollection(account, client, id)
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/resource/LocalResource.kt

@@ -1,98 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.resource
-
-import android.net.Uri
-
-interface LocalResource<in TData: Any> {
-
-    companion object {
-        /**
-         * Resource is present on remote server. This flag is used to identify resources
-         * which are not present on the remote server anymore and can be deleted at the end
-         * of the synchronization.
-         */
-        const val FLAG_REMOTELY_PRESENT = 1
-    }
-
-
-    /**
-     * Unique ID which identifies the resource in the local storage. May be null if the
-     * resource has not been saved yet.
-     */
-    val id: Long?
-
-    /**
-     * Remote file name for the resource, for instance `mycontact.vcf`. Also used to determine whether
-     * a dirty record has just been created (in this case, [fileName] is *null*) or modified
-     * (in this case, [fileName] is the remote file name).
-     */
-    val fileName: String?
-
-    /** remote ETag for the resource */
-    var eTag: String?
-
-    /** remote Schedule-Tag for the resource */
-    var scheduleTag: String?
-
-    /** bitfield of flags; currently either [FLAG_REMOTELY_PRESENT] or 0 */
-    val flags: Int
-
-    /**
-     * Prepares the resource for uploading:
-     *
-     *   1. If the resource doesn't have an UID yet, this method generates one and writes it to the content provider.
-     *   2. The new file name which can be used for the upload is derived from the UID and returned, but not
-     *   saved to the content provider. The sync manager is responsible for saving the file name that
-     *   was actually used.
-     *
-     * @return new file name of the resource (like "<uid>.vcf")
-     */
-    fun prepareForUpload(): String
-
-    /**
-     * Unsets the /dirty/ field of the resource. Typically used after successfully uploading a
-     * locally modified resource.
-     *
-     * @param fileName If this argument is not *null*, [LocalResource.fileName] will be set to its value.
-     * @param eTag ETag of the uploaded resource as returned by the server (null if the server didn't return one)
-     * @param scheduleTag CalDAV Schedule-Tag of the uploaded resource as returned by the server (null if not applicable or if the server didn't return one)
-     */
-    fun clearDirty(fileName: String?, eTag: String?, scheduleTag: String? = null)
-
-    /**
-     * Sets (local) flags of the resource. At the moment, the only allowed values are
-     * 0 and [FLAG_REMOTELY_PRESENT].
-     */
-    fun updateFlags(flags: Int)
-
-
-    /**
-     * Adds the data object to the content provider and ensures that the dirty flag is clear.
-     *
-     * @return content URI of the created row (e.g. event URI)
-     */
-    fun add(): Uri
-
-    /**
-     * Updates the data object in the content provider and ensures that the dirty flag is clear.
-     *
-     * @return content URI of the updated row (e.g. event URI)
-     */
-    fun update(data: TData): Uri
-
-    /**
-     * Deletes the data object from the content provider.
-     *
-     * @return number of affected rows
-     */
-    fun delete(): Int
-
-    /**
-     * Undoes deletion of the data object from the content provider.
-     */
-    fun resetDeleted()
-
-}

app/src/main/kotlin/at/bitfire/davdroid/resource/LocalTask.kt

@@ -1,115 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.resource
-
-import android.content.ContentValues
-import at.bitfire.ical4android.BatchOperation
-import at.bitfire.ical4android.DmfsTask
-import at.bitfire.ical4android.DmfsTaskFactory
-import at.bitfire.ical4android.DmfsTaskList
-import at.bitfire.ical4android.Task
-import org.dmfs.tasks.contract.TaskContract.Tasks
-import java.util.UUID
-
-class LocalTask: DmfsTask, LocalResource<Task> {
-
-    companion object {
-        const val COLUMN_ETAG = Tasks.SYNC1
-        const val COLUMN_FLAGS = Tasks.SYNC2
-    }
-
-    override var fileName: String? = null
-
-    override var scheduleTag: String? = null
-    override var eTag: String? = null
-
-    override var flags = 0
-        private set
-
-
-    constructor(taskList: DmfsTaskList<*>, task: Task, fileName: String?, eTag: String?, flags: Int)
-            : super(taskList, task) {
-        this.fileName = fileName
-        this.eTag = eTag
-        this.flags = flags
-    }
-
-    private constructor(taskList: DmfsTaskList<*>, values: ContentValues): super(taskList) {
-        id = values.getAsLong(Tasks._ID)
-        fileName = values.getAsString(Tasks._SYNC_ID)
-        eTag = values.getAsString(COLUMN_ETAG)
-        flags = values.getAsInteger(COLUMN_FLAGS) ?: 0
-    }
-
-
-    /* process LocalTask-specific fields */
-
-    override fun buildTask(builder: BatchOperation.CpoBuilder, update: Boolean) {
-        super.buildTask(builder, update)
-
-        builder .withValue(Tasks._SYNC_ID, fileName)
-                .withValue(COLUMN_ETAG, eTag)
-                .withValue(COLUMN_FLAGS, flags)
-    }
-
-
-    /* custom queries */
-
-    override fun prepareForUpload(): String {
-        val uid: String = task!!.uid ?: run {
-            // generate new UID
-            val newUid = UUID.randomUUID().toString()
-
-            // update in tasks provider
-            val values = ContentValues(1)
-            values.put(Tasks._UID, newUid)
-            taskList.provider.update(taskSyncURI(), values, null, null)
-
-            // update this task
-            task!!.uid = newUid
-
-            newUid
-        }
-
-        return "$uid.ics"
-    }
-
-    override fun clearDirty(fileName: String?, eTag: String?, scheduleTag: String?) {
-        if (scheduleTag != null)
-            logger.fine("Schedule-Tag for tasks not supported yet, won't save")
-
-        val values = ContentValues(4)
-        if (fileName != null)
-            values.put(Tasks._SYNC_ID, fileName)
-        values.put(COLUMN_ETAG, eTag)
-        values.put(Tasks.SYNC_VERSION, task!!.sequence)
-        values.put(Tasks._DIRTY, 0)
-        taskList.provider.update(taskSyncURI(), values, null, null)
-
-        if (fileName != null)
-            this.fileName = fileName
-        this.eTag = eTag
-    }
-
-    override fun updateFlags(flags: Int) {
-        if (id != null) {
-            val values = ContentValues(1)
-            values.put(COLUMN_FLAGS, flags)
-            taskList.provider.update(taskSyncURI(), values, null, null)
-        }
-
-        this.flags = flags
-    }
-
-    override fun resetDeleted() {
-        throw NotImplementedError()
-    }
-
-
-    object Factory: DmfsTaskFactory<LocalTask> {
-        override fun fromProvider(taskList: DmfsTaskList<*>, values: ContentValues) =
-                LocalTask(taskList, values)
-    }
-}

app/src/main/kotlin/at/bitfire/davdroid/resource/LocalTaskList.kt

@@ -1,188 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.resource
-
-import android.accounts.Account
-import android.annotation.SuppressLint
-import android.content.ContentProviderClient
-import android.content.ContentValues
-import android.content.Context
-import android.net.Uri
-import at.bitfire.davdroid.Constants
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.SyncState
-import at.bitfire.davdroid.util.DavUtils.lastSegment
-import at.bitfire.ical4android.DmfsTaskList
-import at.bitfire.ical4android.DmfsTaskListFactory
-import at.bitfire.ical4android.TaskProvider
-import org.dmfs.tasks.contract.TaskContract.*
-import java.util.logging.Level
-import java.util.logging.Logger
-
-/**
- * App-specific implementation of a task list.
- *
- * [TaskLists._SYNC_ID] is used to store the task list URL.
- */
-class LocalTaskList private constructor(
-        account: Account,
-        provider: ContentProviderClient,
-        providerName: TaskProvider.ProviderName,
-        id: Long
-): DmfsTaskList<LocalTask>(account, provider, providerName, LocalTask.Factory, id), LocalCollection<LocalTask> {
-
-    companion object {
-
-        fun create(account: Account, provider: ContentProviderClient, providerName: TaskProvider.ProviderName, info: Collection): Uri {
-            // If the collection doesn't have a color, use a default color.
-            if (info.color != null)
-                info.color = Constants.DAVDROID_GREEN_RGBA
-
-            val values = valuesFromCollectionInfo(info, withColor = true)
-            values.put(TaskLists.OWNER, account.name)
-            values.put(TaskLists.SYNC_ENABLED, 1)
-            values.put(TaskLists.VISIBLE, 1)
-            return create(account, provider, providerName, values)
-        }
-
-        @SuppressLint("Recycle")
-        @Throws(Exception::class)
-        fun onRenameAccount(context: Context, oldName: String, newName: String) {
-            TaskProvider.acquire(context)?.use { provider ->
-                val values = ContentValues(1)
-                values.put(Tasks.ACCOUNT_NAME, newName)
-                provider.client.update(
-                        Tasks.getContentUri(provider.name.authority),
-                        values,
-                        "${Tasks.ACCOUNT_NAME}=?", arrayOf(oldName)
-                )
-            }
-        }
-
-        private fun valuesFromCollectionInfo(info: Collection, withColor: Boolean): ContentValues {
-            val values = ContentValues(3)
-            values.put(TaskLists._SYNC_ID, info.url.toString())
-            values.put(TaskLists.LIST_NAME,
-                if (info.displayName.isNullOrBlank()) info.url.lastSegment else info.displayName)
-
-            if (withColor && info.color != null)
-                values.put(TaskLists.LIST_COLOR, info.color)
-
-            if (info.privWriteContent && !info.forceReadOnly)
-                values.put(TaskListColumns.ACCESS_LEVEL, TaskListColumns.ACCESS_LEVEL_OWNER)
-            else
-                values.put(TaskListColumns.ACCESS_LEVEL, TaskListColumns.ACCESS_LEVEL_READ)
-
-            return values
-        }
-
-    }
-    
-    private val logger = Logger.getGlobal()
-
-    private var accessLevel: Int = TaskListColumns.ACCESS_LEVEL_UNDEFINED
-    override val readOnly
-        get() =
-            accessLevel != TaskListColumns.ACCESS_LEVEL_UNDEFINED &&
-            accessLevel <= TaskListColumns.ACCESS_LEVEL_READ
-
-    override fun deleteCollection(): Boolean = delete()
-
-    override val collectionUrl: String?
-        get() = syncId
-
-    override val tag: String
-        get() = "tasks-${account.name}-$id"
-
-    override val title: String
-        get() = name ?: id.toString()
-
-    override var lastSyncState: SyncState?
-        get() {
-            try {
-                provider.query(taskListSyncUri(), arrayOf(TaskLists.SYNC_VERSION),
-                        null, null, null)?.use { cursor ->
-                    if (cursor.moveToNext())
-                        cursor.getString(0)?.let {
-                            return SyncState.fromString(it)
-                        }
-                }
-            } catch (e: Exception) {
-                logger.log(Level.WARNING, "Couldn't read sync state", e)
-            }
-            return null
-        }
-        set(state) {
-            val values = ContentValues(1)
-            values.put(TaskLists.SYNC_VERSION, state?.toString())
-            provider.update(taskListSyncUri(), values, null, null)
-        }
-
-
-    override fun populate(values: ContentValues) {
-        super.populate(values)
-        accessLevel = values.getAsInteger(TaskListColumns.ACCESS_LEVEL)
-    }
-
-    fun update(info: Collection, updateColor: Boolean) =
-        update(valuesFromCollectionInfo(info, updateColor))
-
-
-    override fun findDeleted() = queryTasks(Tasks._DELETED, null)
-
-    override fun findDirty(): List<LocalTask> {
-        val tasks = queryTasks(Tasks._DIRTY, null)
-        for (localTask in tasks) {
-            try {
-                val task = requireNotNull(localTask.task)
-                val sequence = task.sequence
-                if (sequence == null)   // sequence has not been assigned yet (i.e. this task was just locally created)
-                    task.sequence = 0
-                else                    // task was modified, increase sequence
-                    task.sequence = sequence + 1
-            } catch(e: Exception) {
-                logger.log(Level.WARNING, "Couldn't check/increase sequence", e)
-            }
-        }
-        return tasks
-    }
-
-    override fun findByName(name: String) =
-            queryTasks("${Tasks._SYNC_ID}=?", arrayOf(name)).firstOrNull()
-
-
-    override fun markNotDirty(flags: Int): Int {
-        val values = ContentValues(1)
-        values.put(LocalTask.COLUMN_FLAGS, flags)
-        return provider.update(tasksSyncUri(), values,
-                "${Tasks.LIST_ID}=? AND ${Tasks._DIRTY}=0",
-                arrayOf(id.toString()))
-    }
-
-    override fun removeNotDirtyMarked(flags: Int) =
-            provider.delete(tasksSyncUri(),
-                    "${Tasks.LIST_ID}=? AND NOT ${Tasks._DIRTY} AND ${LocalTask.COLUMN_FLAGS}=?",
-                    arrayOf(id.toString(), flags.toString()))
-
-    override fun forgetETags() {
-        val values = ContentValues(1)
-        values.putNull(LocalEvent.COLUMN_ETAG)
-        provider.update(tasksSyncUri(), values, "${Tasks.LIST_ID}=?",
-                arrayOf(id.toString()))
-    }
-
-
-    object Factory: DmfsTaskListFactory<LocalTaskList> {
-
-        override fun newInstance(
-            account: Account,
-            provider: ContentProviderClient,
-            providerName: TaskProvider.ProviderName,
-            id: Long
-        ) = LocalTaskList(account, provider, providerName, id)
-
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/servicedetection/CollectionListRefresher.kt

@@ -1,365 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.servicedetection
-
-import at.bitfire.dav4jvm.DavResource
-import at.bitfire.dav4jvm.Property
-import at.bitfire.dav4jvm.Response
-import at.bitfire.dav4jvm.UrlUtils
-import at.bitfire.dav4jvm.exception.HttpException
-import at.bitfire.dav4jvm.property.caldav.CalendarHomeSet
-import at.bitfire.dav4jvm.property.caldav.CalendarProxyReadFor
-import at.bitfire.dav4jvm.property.caldav.CalendarProxyWriteFor
-import at.bitfire.dav4jvm.property.carddav.AddressbookHomeSet
-import at.bitfire.dav4jvm.property.webdav.CurrentUserPrivilegeSet
-import at.bitfire.dav4jvm.property.webdav.DisplayName
-import at.bitfire.dav4jvm.property.webdav.GroupMembership
-import at.bitfire.dav4jvm.property.webdav.HrefListProperty
-import at.bitfire.dav4jvm.property.webdav.Owner
-import at.bitfire.dav4jvm.property.webdav.ResourceType
-import at.bitfire.davdroid.db.AppDatabase
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.HomeSet
-import at.bitfire.davdroid.db.Principal
-import at.bitfire.davdroid.db.Service
-import at.bitfire.davdroid.repository.DavCollectionRepository
-import at.bitfire.davdroid.repository.DavHomeSetRepository
-import at.bitfire.davdroid.settings.Settings
-import at.bitfire.davdroid.settings.SettingsManager
-import at.bitfire.davdroid.util.DavUtils.parent
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedFactory
-import dagger.assisted.AssistedInject
-import okhttp3.HttpUrl
-import okhttp3.OkHttpClient
-import java.util.logging.Level
-import java.util.logging.Logger
-
-/**
- * Logic for refreshing the list of collections and home-sets and related information.
- */
-class CollectionListRefresher @AssistedInject constructor(
-    @Assisted val service: Service,
-    @Assisted val httpClient: OkHttpClient,
-    private val db: AppDatabase,
-    private val collectionRepository: DavCollectionRepository,
-    private val homeSetRepository: DavHomeSetRepository,
-    private val logger: Logger,
-    private val settings: SettingsManager
-) {
-
-    @AssistedFactory
-    interface Factory {
-        fun create(service: Service, httpClient: OkHttpClient): CollectionListRefresher
-    }
-
-
-    private val alreadyQueried = mutableSetOf<HttpUrl>()
-
-    /**
-     * Starting at current-user-principal URL, tries to recursively find and save all user relevant home sets.
-     *
-     *
-     * @param principalUrl  URL of principal to query (user-provided principal or current-user-principal)
-     * @param level         Current recursion level (limited to 0, 1 or 2):
-     *
-     * - 0: We assume found home sets belong to the current-user-principal
-     * - 1 or 2: We assume found home sets don't directly belong to the current-user-principal
-     *
-     * @throws java.io.IOException
-     * @throws HttpException
-     * @throws at.bitfire.dav4jvm.exception.DavException
-     */
-    internal fun discoverHomesets(principalUrl: HttpUrl, level: Int = 0) {
-        logger.fine("Discovering homesets of $principalUrl")
-        val relatedResources = mutableSetOf<HttpUrl>()
-
-        // Define homeset class and properties to look for
-        val homeSetClass: Class<out HrefListProperty>
-        val properties: Array<Property.Name>
-        when (service.type) {
-            Service.TYPE_CARDDAV -> {
-                homeSetClass = AddressbookHomeSet::class.java
-                properties = arrayOf(DisplayName.NAME, AddressbookHomeSet.NAME, GroupMembership.NAME, ResourceType.NAME)
-            }
-            Service.TYPE_CALDAV -> {
-                homeSetClass = CalendarHomeSet::class.java
-                properties = arrayOf(
-                    DisplayName.NAME,
-                    CalendarHomeSet.NAME,
-                    CalendarProxyReadFor.NAME,
-                    CalendarProxyWriteFor.NAME,
-                    GroupMembership.NAME,
-                    ResourceType.NAME
-                )
-            }
-            else -> throw IllegalArgumentException()
-        }
-
-        // Query the URL
-        val principal = DavResource(httpClient, principalUrl)
-        val personal = level == 0
-        try {
-            principal.propfind(0, *properties) { davResponse, _ ->
-                alreadyQueried += davResponse.href
-
-                // If response holds home sets, save them
-                davResponse[homeSetClass]?.let { homeSets ->
-                    for (homeSetHref in homeSets.hrefs)
-                        principal.location.resolve(homeSetHref)?.let { homesetUrl ->
-                            val resolvedHomeSetUrl = UrlUtils.withTrailingSlash(homesetUrl)
-                            // Homeset is considered personal if this is the outer recursion call,
-                            // This is because we assume the first call to query the current-user-principal
-                            // Note: This is not be be confused with the DAV:owner attribute. Home sets can be owned by
-                            // other principals and still be considered "personal" (belonging to the current-user-principal).
-                            homeSetRepository.insertOrUpdateByUrl(
-                                HomeSet(0, service.id, personal, resolvedHomeSetUrl)
-                            )
-                        }
-                }
-
-                // Add related principals to be queried afterwards
-                if (personal) {
-                    val relatedResourcesTypes = listOf(
-                        // current resource is a read/write-proxy for other principals
-                        CalendarProxyReadFor::class.java,
-                        CalendarProxyWriteFor::class.java,
-                        // current resource is a member of a group (principal that can also have proxies)
-                        GroupMembership::class.java
-                    )
-                    for (type in relatedResourcesTypes)
-                        davResponse[type]?.let {
-                            for (href in it.hrefs)
-                                principal.location.resolve(href)?.let { url ->
-                                    relatedResources += url
-                                }
-                        }
-                }
-
-                // If current resource is a calendar-proxy-read/write, it's likely that its parent is a principal, too.
-                davResponse[ResourceType::class.java]?.let { resourceType ->
-                    val proxyProperties = arrayOf(
-                        ResourceType.CALENDAR_PROXY_READ,
-                        ResourceType.CALENDAR_PROXY_WRITE,
-                    )
-                    if (proxyProperties.any { resourceType.types.contains(it) })
-                        relatedResources += davResponse.href.parent()
-                }
-            }
-        } catch (e: HttpException) {
-            if (e.code/100 == 4)
-                logger.log(Level.INFO, "Ignoring Client Error 4xx while looking for ${service.type} home sets", e)
-            else
-                throw e
-        }
-
-        // query related resources
-        if (level <= 1)
-            for (resource in relatedResources)
-                if (alreadyQueried.contains(resource))
-                    logger.warning("$resource already queried, skipping")
-                else
-                    discoverHomesets(resource, level + 1)
-    }
-
-    /**
-     * Refreshes home-sets and their collections.
-     *
-     * Each stored home-set URL is queried (`PROPFIND`) and its collections are either saved, updated
-     * or marked as homeless - in case a collection was removed from its home-set.
-     *
-     * If a home-set URL in fact points to a collection directly, the collection will be saved with this URL,
-     * and a null value for it's home-set. Refreshing of collections without home-sets is then handled by [refreshHomelessCollections].
-     */
-    internal fun refreshHomesetsAndTheirCollections() {
-        val homesets = homeSetRepository.getByService(service.id).associateBy { it.url }.toMutableMap()
-        for((homeSetUrl, localHomeset) in homesets) {
-            logger.fine("Listing home set $homeSetUrl")
-
-            // To find removed collections in this homeset: create a queue from existing collections and remove every collection that
-            // is successfully rediscovered. If there are collections left, after processing is done, these are marked homeless.
-            val localHomesetCollections = db.collectionDao()
-                .getByServiceAndHomeset(service.id, localHomeset.id)
-                .associateBy { it.url }
-                .toMutableMap()
-
-            try {
-                DavResource(httpClient, homeSetUrl).propfind(1, *RefreshCollectionsWorker.DAV_COLLECTION_PROPERTIES) { response, relation ->
-                    // Note: This callback may be called multiple times ([MultiResponseCallback])
-                    if (!response.isSuccess())
-                        return@propfind
-
-                    if (relation == Response.HrefRelation.SELF) {
-                        // this response is about the homeset itself
-                        localHomeset.displayName = response[DisplayName::class.java]?.displayName
-                        localHomeset.privBind = response[CurrentUserPrivilegeSet::class.java]?.mayBind ?: true
-                        homeSetRepository.insertOrUpdateByUrl(localHomeset)
-                    }
-
-                    // in any case, check whether the response is about a usable collection
-                    val collection = Collection.fromDavResponse(response) ?: return@propfind
-
-                    collection.serviceId = service.id
-                    collection.homeSetId = localHomeset.id
-                    collection.sync = shouldPreselect(collection, homesets.values)
-
-                    // .. and save the principal url (collection owner)
-                    response[Owner::class.java]?.href
-                        ?.let { response.href.resolve(it) }
-                        ?.let { principalUrl ->
-                            val principal = Principal.fromServiceAndUrl(service, principalUrl)
-                            val id = db.principalDao().insertOrUpdate(service.id, principal)
-                            collection.ownerId = id
-                        }
-
-                    logger.log(Level.FINE, "Found collection", collection)
-
-                    // save or update collection if usable (ignore it otherwise)
-                    if (isUsableCollection(collection))
-                        collectionRepository.insertOrUpdateByUrlAndRememberFlags(collection)
-
-                    // Remove this collection from queue - because it was found in the home set
-                    localHomesetCollections.remove(collection.url)
-                }
-            } catch (e: HttpException) {
-                // delete home set locally if it was not accessible (40x)
-                if (e.code in arrayOf(403, 404, 410))
-                    homeSetRepository.delete(localHomeset)
-            }
-
-            // Mark leftover (not rediscovered) collections from queue as homeless (remove association)
-            for ((_, homelessCollection) in localHomesetCollections) {
-                homelessCollection.homeSetId = null
-                collectionRepository.insertOrUpdateByUrlAndRememberFlags(homelessCollection)
-            }
-
-        }
-    }
-
-    /**
-     * Refreshes collections which don't have a homeset.
-     *
-     * It queries each stored collection with a homeSetId of "null" and either updates or deletes (if inaccessible or unusable) them.
-     */
-    internal fun refreshHomelessCollections() {
-        val homelessCollections = db.collectionDao().getByServiceAndHomeset(service.id, null).associateBy { it.url }.toMutableMap()
-        for((url, localCollection) in homelessCollections) try {
-            DavResource(httpClient, url).propfind(0, *RefreshCollectionsWorker.DAV_COLLECTION_PROPERTIES) { response, _ ->
-                if (!response.isSuccess()) {
-                    collectionRepository.delete(localCollection)
-                    return@propfind
-                }
-
-                // Save or update the collection, if usable, otherwise delete it
-                Collection.fromDavResponse(response)?.let { collection ->
-                    if (!isUsableCollection(collection))
-                        return@let
-                    collection.serviceId = localCollection.serviceId       // use same service ID as previous entry
-
-                    // .. and save the principal url (collection owner)
-                    response[Owner::class.java]?.href
-                        ?.let { response.href.resolve(it) }
-                        ?.let { principalUrl ->
-                            val principal = Principal.fromServiceAndUrl(service, principalUrl)
-                            val principalId = db.principalDao().insertOrUpdate(service.id, principal)
-                            collection.ownerId = principalId
-                        }
-
-                    collectionRepository.insertOrUpdateByUrlAndRememberFlags(collection)
-                } ?: collectionRepository.delete(localCollection)
-            }
-        } catch (e: HttpException) {
-            // delete collection locally if it was not accessible (40x)
-            if (e.code in arrayOf(403, 404, 410))
-                collectionRepository.delete(localCollection)
-            else
-                throw e
-        }
-
-    }
-
-    /**
-     * Refreshes the principals (get their current display names).
-     * Also removes principals which do not own any collections anymore.
-     */
-    internal fun refreshPrincipals() {
-        // Refresh principals (collection owner urls)
-        val principals = db.principalDao().getByService(service.id)
-        for (oldPrincipal in principals) {
-            val principalUrl = oldPrincipal.url
-            logger.fine("Querying principal $principalUrl")
-            try {
-                DavResource(httpClient, principalUrl).propfind(0, *RefreshCollectionsWorker.DAV_PRINCIPAL_PROPERTIES) { response, _ ->
-                    if (!response.isSuccess())
-                        return@propfind
-                    Principal.fromDavResponse(service.id, response)?.let { principal ->
-                        logger.fine("Got principal: $principal")
-                        db.principalDao().insertOrUpdate(service.id, principal)
-                    }
-                }
-            } catch (e: HttpException) {
-                logger.info("Principal update failed with response code ${e.code}. principalUrl=$principalUrl")
-            }
-        }
-
-        // Delete principals which don't own any collections
-        db.principalDao().getAllWithoutCollections().forEach {principal ->
-            db.principalDao().delete(principal)
-        }
-    }
-
-    /**
-     * Finds out whether given collection is usable, by checking that either
-     *  - CalDAV/CardDAV: service and collection type match, or
-     *  - WebCal: subscription source URL is not empty
-     */
-    private fun isUsableCollection(collection: Collection) =
-        (service.type == Service.TYPE_CARDDAV && collection.type == Collection.TYPE_ADDRESSBOOK) ||
-                (service.type == Service.TYPE_CALDAV && arrayOf(Collection.TYPE_CALENDAR, Collection.TYPE_WEBCAL).contains(collection.type)) ||
-                (collection.type == Collection.TYPE_WEBCAL && collection.source != null)
-
-    /**
-     * Whether to preselect the given collection for synchronisation, according to the
-     * settings [Settings.PRESELECT_COLLECTIONS] (see there for allowed values) and
-     * [Settings.PRESELECT_COLLECTIONS_EXCLUDED].
-     *
-     * A collection is considered _personal_ if it is found in one of the current-user-principal's home-sets.
-     *
-     * Before a collection is pre-selected, we check whether its URL matches the regexp in
-     * [Settings.PRESELECT_COLLECTIONS_EXCLUDED], in which case *false* is returned.
-     *
-     * @param collection the collection to check
-     * @param homesets list of home-sets (to check whether collection is in a personal home-set)
-     * @return *true* if the collection should be preselected for synchronization; *false* otherwise
-     */
-    internal fun shouldPreselect(collection: Collection, homesets: Iterable<HomeSet>): Boolean {
-        val shouldPreselect = settings.getIntOrNull(Settings.PRESELECT_COLLECTIONS)
-
-        val excluded by lazy {
-            val excludedRegex = settings.getString(Settings.PRESELECT_COLLECTIONS_EXCLUDED)
-            if (!excludedRegex.isNullOrEmpty())
-                Regex(excludedRegex).containsMatchIn(collection.url.toString())
-            else
-                false
-        }
-
-        return when (shouldPreselect) {
-            Settings.PRESELECT_COLLECTIONS_ALL ->
-                // preselect if collection url is not excluded
-                !excluded
-
-            Settings.PRESELECT_COLLECTIONS_PERSONAL ->
-                // preselect if is personal (in a personal home-set), but not excluded
-                homesets
-                    .filter { homeset -> homeset.personal }
-                    .map { homeset -> homeset.id }
-                    .contains(collection.homeSetId)
-                    && !excluded
-
-            else -> // don't preselect
-                false
-        }
-    }
-}

app/src/main/kotlin/at/bitfire/davdroid/settings/AccountSettings.kt

@@ -1,523 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-package at.bitfire.davdroid.settings
-
-import android.accounts.Account
-import android.accounts.AccountManager
-import android.content.ContentResolver
-import android.content.Context
-import android.os.Bundle
-import android.os.Looper
-import android.provider.CalendarContract
-import androidx.annotation.WorkerThread
-import at.bitfire.davdroid.InvalidAccountException
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.db.Credentials
-import at.bitfire.davdroid.sync.SyncUtils
-import at.bitfire.davdroid.sync.worker.SyncWorkerManager
-import at.bitfire.davdroid.util.setAndVerifyUserData
-import at.bitfire.davdroid.util.trimToNull
-import at.bitfire.ical4android.TaskProvider
-import at.bitfire.vcard4android.GroupMethod
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedFactory
-import dagger.assisted.AssistedInject
-import dagger.hilt.android.qualifiers.ApplicationContext
-import net.openid.appauth.AuthState
-import java.util.logging.Level
-import java.util.logging.Logger
-
-/**
- * Manages settings of an account.
- *
- * Must not be called from main thread as it uses blocking I/O
- * and may run migrations.
- *
- * @param account   account to take settings from
- *
- * @throws InvalidAccountException      on construction when the account doesn't exist (anymore)
- * @throws IllegalArgumentException     when the account is not a DAVx5 account
- */
-@WorkerThread   
-class AccountSettings @AssistedInject constructor(
-    @Assisted val account: Account,
-    @ApplicationContext val context: Context,
-    private val logger: Logger,
-    private val migrationsFactory: AccountSettingsMigrations.Factory,
-    private val settingsManager: SettingsManager,
-    private val syncWorkerManager: SyncWorkerManager
-) {
-
-    @AssistedFactory
-    interface Factory {
-        /**
-         * Must not be called from main thread as AccountSettings uses blocking I/O and may run
-         * migrations.
-         */
-        @WorkerThread
-        fun create(account: Account): AccountSettings
-    }
-
-    init {
-        if (Looper.getMainLooper() == Looper.myLooper())
-            throw IllegalThreadStateException("AccountSettings may not be used on main thread")
-    }
-
-    val accountManager: AccountManager = AccountManager.get(context)
-    init {
-        val allowedAccountTypes = arrayOf(
-            context.getString(R.string.account_type),
-            "at.bitfire.davdroid.test"      // R.strings.account_type_test in androidTest
-        )
-        if (!allowedAccountTypes.contains(account.type))
-            throw IllegalArgumentException("Invalid account type: ${account.type}")
-
-        // synchronize because account migration must only be run one time
-        synchronized(AccountSettings::class.java) {
-            val versionStr = accountManager.getUserData(account, KEY_SETTINGS_VERSION) ?: throw InvalidAccountException(account)
-            var version = 0
-            try {
-                version = Integer.parseInt(versionStr)
-            } catch (e: NumberFormatException) {
-                logger.log(Level.SEVERE, "Invalid account version: $versionStr", e)
-            }
-            logger.fine("Account ${account.name} has version $version, current version: $CURRENT_VERSION")
-
-            if (version < CURRENT_VERSION) {
-                if (currentlyUpdating) {
-                    logger.severe("Redundant call: migration created AccountSettings(). This must never happen.")
-                    throw IllegalStateException("Redundant call: migration created AccountSettings()")
-                } else {
-                    currentlyUpdating = true
-                    update(version)
-                    currentlyUpdating = false
-                }
-            }
-        }
-    }
-
-
-    // authentication settings
-
-    fun credentials() = Credentials(
-        accountManager.getUserData(account, KEY_USERNAME),
-        accountManager.getPassword(account),
-
-        accountManager.getUserData(account, KEY_CERTIFICATE_ALIAS),
-
-        accountManager.getUserData(account, KEY_AUTH_STATE)?.let { json ->
-            AuthState.jsonDeserialize(json)
-        }
-    )
-
-    fun credentials(credentials: Credentials) {
-        // Basic/Digest auth
-        accountManager.setAndVerifyUserData(account, KEY_USERNAME, credentials.username)
-        accountManager.setPassword(account, credentials.password)
-
-        // client certificate
-        accountManager.setAndVerifyUserData(account, KEY_CERTIFICATE_ALIAS, credentials.certificateAlias)
-
-        // OAuth
-        accountManager.setAndVerifyUserData(account, KEY_AUTH_STATE, credentials.authState?.jsonSerializeString())
-    }
-
-
-    // sync. settings
-
-    /**
-     * Gets the currently set sync interval for this account in seconds.
-     *
-     * @param authority authority to check (for instance: [CalendarContract.AUTHORITY]])
-     * @return sync interval in seconds; *[SYNC_INTERVAL_MANUALLY]* if manual sync; *null* if not set
-     */
-    fun getSyncInterval(authority: String): Long? {
-        val addrBookAuthority = context.getString(R.string.address_books_authority)
-
-        if (ContentResolver.getIsSyncable(account, authority) <= 0 && authority != addrBookAuthority)
-            return null
-
-        val key = when {
-            authority == addrBookAuthority ->
-                KEY_SYNC_INTERVAL_ADDRESSBOOKS
-            authority == CalendarContract.AUTHORITY ->
-                KEY_SYNC_INTERVAL_CALENDARS
-            TaskProvider.ProviderName.entries.any { it.authority == authority } ->
-                KEY_SYNC_INTERVAL_TASKS
-            else -> return null
-        }
-        return accountManager.getUserData(account, key)?.toLong()
-    }
-
-    fun getTasksSyncInterval() = accountManager.getUserData(account, KEY_SYNC_INTERVAL_TASKS)?.toLong()
-
-    /**
-     * Sets the sync interval and en- or disables periodic sync for the given account and authority.
-     * Does *not* call [ContentResolver.setIsSyncable].
-     *
-     * This method blocks until a worker as been created and enqueued (sync active) or removed
-     * (sync disabled), so it should not be called from the UI thread.
-     *
-     * @param authority sync authority (like [CalendarContract.AUTHORITY])
-     * @param _seconds if [SYNC_INTERVAL_MANUALLY]: automatic sync will be disabled;
-     * otherwise (must be ≥ 15 min): automatic sync will be enabled and set to the given number of seconds
-     */
-    @WorkerThread
-    fun setSyncInterval(authority: String, _seconds: Long) {
-        val seconds =
-            if (_seconds != SYNC_INTERVAL_MANUALLY && _seconds < 60*15)
-                60*15
-            else
-                _seconds
-
-        // Store (user defined) sync interval in account settings
-        val key = when {
-            authority == context.getString(R.string.address_books_authority) ->
-                KEY_SYNC_INTERVAL_ADDRESSBOOKS
-            authority == CalendarContract.AUTHORITY ->
-                KEY_SYNC_INTERVAL_CALENDARS
-            TaskProvider.ProviderName.entries.any { it.authority == authority } ->
-                KEY_SYNC_INTERVAL_TASKS
-            else -> {
-                logger.warning("Sync interval not applicable to authority $authority")
-                return
-            }
-        }
-        accountManager.setAndVerifyUserData(account, key, seconds.toString())
-
-        // update sync workers (needs already updated sync interval in AccountSettings)
-        updatePeriodicSyncWorker(authority, seconds, getSyncWifiOnly())
-
-        // Also enable/disable content change triggered syncs (SyncFramework automatic sync).
-        // We could make this a separate user adjustable setting later on.
-        setSyncOnContentChange(authority, seconds != SYNC_INTERVAL_MANUALLY)
-    }
-
-    /**
-     * Enables/disables sync adapter automatic sync (content triggered sync) for the given
-     * account and authority. Does *not* call [ContentResolver.setIsSyncable].
-     *
-     * We use the sync adapter framework only for the trigger, actual syncing is implemented
-     * with WorkManager. The trigger comes in through SyncAdapterService.
-     *
-     * This method blocks until the sync-on-content-change has been enabled or disabled, so it
-     * should not be called from the UI thread.
-     *
-     * @param enable    *true* enables automatic sync; *false* disables it
-     * @param authority sync authority (like [CalendarContract.AUTHORITY])
-     * @return whether the content triggered sync was enabled successfully
-     */
-    @WorkerThread
-    fun setSyncOnContentChange(authority: String, enable: Boolean): Boolean {
-        // Enable content change triggers (sync adapter framework)
-        val setContentTrigger: () -> Boolean =
-            /* Ugly hack: because there is no callback for when the sync status/interval has been
-            updated, we need to make this call blocking. */
-            if (enable) {{
-                logger.fine("Enabling content-triggered sync of $account/$authority")
-                ContentResolver.setSyncAutomatically(account, authority, true) // enables content triggers
-                // Remove unwanted sync framework periodic syncs created by setSyncAutomatically
-                for (periodicSync in ContentResolver.getPeriodicSyncs(account, authority))
-                    ContentResolver.removePeriodicSync(periodicSync.account, periodicSync.authority, periodicSync.extras)
-                /* return */ ContentResolver.getSyncAutomatically(account, authority)
-            }} else {{
-                logger.fine("Disabling content-triggered sync of $account/$authority")
-                ContentResolver.setSyncAutomatically(account, authority, false) // disables content triggers
-                /* return */ !ContentResolver.getSyncAutomatically(account, authority)
-            }}
-
-        // try up to 10 times with 100 ms pause
-        for (idxTry in 0 until 10) {
-            if (setContentTrigger())
-                // successfully set
-                return true
-            Thread.sleep(100)
-        }
-        return false
-    }
-
-    fun getSyncWifiOnly() =
-        if (settingsManager.containsKey(KEY_WIFI_ONLY))
-            settingsManager.getBoolean(KEY_WIFI_ONLY)
-        else
-            accountManager.getUserData(account, KEY_WIFI_ONLY) != null
-
-    fun setSyncWiFiOnly(wiFiOnly: Boolean) {
-        accountManager.setAndVerifyUserData(account, KEY_WIFI_ONLY, if (wiFiOnly) "1" else null)
-
-        // update sync workers (needs already updated wifi-only flag in AccountSettings)
-        for (authority in SyncUtils.syncAuthorities(context))
-            updatePeriodicSyncWorker(authority, getSyncInterval(authority), wiFiOnly)
-    }
-
-    fun getSyncWifiOnlySSIDs(): List<String>? =
-        if (getSyncWifiOnly()) {
-            val strSsids = if (settingsManager.containsKey(KEY_WIFI_ONLY_SSIDS))
-                settingsManager.getString(KEY_WIFI_ONLY_SSIDS)
-            else
-                accountManager.getUserData(account, KEY_WIFI_ONLY_SSIDS)
-            strSsids?.split(',')
-        } else
-            null
-    fun setSyncWifiOnlySSIDs(ssids: List<String>?) =
-        accountManager.setAndVerifyUserData(account, KEY_WIFI_ONLY_SSIDS, ssids?.joinToString(",").trimToNull())
-
-    fun getIgnoreVpns(): Boolean =
-        when (accountManager.getUserData(account, KEY_IGNORE_VPNS)) {
-            null -> settingsManager.getBoolean(KEY_IGNORE_VPNS)
-            "0" -> false
-            else -> true
-        }
-
-    fun setIgnoreVpns(ignoreVpns: Boolean) =
-        accountManager.setAndVerifyUserData(account, KEY_IGNORE_VPNS, if (ignoreVpns) "1" else "0")
-
-    /**
-     * Updates the periodic sync worker of an authority according to
-     *
-     * - the sync interval and
-     * - the _Sync WiFi only_ flag.
-     *
-     * @param authority   periodic sync workers for this authority will be updated
-     * @param seconds     sync interval in seconds (`null` or [SYNC_INTERVAL_MANUALLY] disables periodic sync)
-     * @param wiFiOnly    sync Wifi only flag
-     */
-    fun updatePeriodicSyncWorker(authority: String, seconds: Long?, wiFiOnly: Boolean) {
-        try {
-            if (seconds == null || seconds == SYNC_INTERVAL_MANUALLY) {
-                logger.fine("Disabling periodic sync of $account/$authority")
-                syncWorkerManager.disablePeriodic(account, authority)
-            } else {
-                logger.fine("Setting periodic sync of $account/$authority to $seconds seconds (wifiOnly=$wiFiOnly)")
-                syncWorkerManager.enablePeriodic(account, authority, seconds, wiFiOnly)
-            }.result.get() // On operation (enable/disable) failure exception is thrown
-        } catch (e: Exception) {
-            logger.log(Level.SEVERE, "Failed to set sync interval of $account/$authority to $seconds seconds", e)
-        }
-    }
-
-
-    // CalDAV settings
-
-    fun getTimeRangePastDays(): Int? {
-        val strDays = accountManager.getUserData(account, KEY_TIME_RANGE_PAST_DAYS)
-        return if (strDays != null) {
-            val days = strDays.toInt()
-            if (days < 0)
-                null
-            else
-                days
-        } else
-            DEFAULT_TIME_RANGE_PAST_DAYS
-    }
-
-    fun setTimeRangePastDays(days: Int?) =
-            accountManager.setAndVerifyUserData(account, KEY_TIME_RANGE_PAST_DAYS, (days ?: -1).toString())
-
-    /**
-     * Takes the default alarm setting (in this order) from
-     *
-     * 1. the local account settings
-     * 2. the settings provider (unless the value is -1 there).
-     *
-     * @return A default reminder shall be created this number of minutes before the start of every
-     * non-full-day event without reminder. *null*: No default reminders shall be created.
-     */
-    fun getDefaultAlarm() =
-            accountManager.getUserData(account, KEY_DEFAULT_ALARM)?.toInt() ?:
-            settingsManager.getIntOrNull(KEY_DEFAULT_ALARM)?.takeIf { it != -1 }
-
-    /**
-     * Sets the default alarm value in the local account settings, if the new value differs
-     * from the value of the settings provider. If the new value is the same as the value of
-     * the settings provider, the local setting will be deleted, so that the settings provider
-     * value applies.
-     *
-     * @param minBefore The number of minutes a default reminder shall be created before the
-     * start of every non-full-day event without reminder. *null*: No default reminders shall be created.
-     */
-    fun setDefaultAlarm(minBefore: Int?) =
-            accountManager.setAndVerifyUserData(account, KEY_DEFAULT_ALARM,
-                    if (minBefore == settingsManager.getIntOrNull(KEY_DEFAULT_ALARM)?.takeIf { it != -1 })
-                        null
-                    else
-                        minBefore?.toString())
-
-    fun getManageCalendarColors() =
-        if (settingsManager.containsKey(KEY_MANAGE_CALENDAR_COLORS))
-            settingsManager.getBoolean(KEY_MANAGE_CALENDAR_COLORS)
-        else
-            accountManager.getUserData(account, KEY_MANAGE_CALENDAR_COLORS) == null
-    fun setManageCalendarColors(manage: Boolean) =
-            accountManager.setAndVerifyUserData(account, KEY_MANAGE_CALENDAR_COLORS, if (manage) null else "0")
-
-    fun getEventColors() =
-        if (settingsManager.containsKey(KEY_EVENT_COLORS))
-            settingsManager.getBoolean(KEY_EVENT_COLORS)
-        else
-            accountManager.getUserData(account, KEY_EVENT_COLORS) != null
-    fun setEventColors(useColors: Boolean) =
-            accountManager.setAndVerifyUserData(account, KEY_EVENT_COLORS, if (useColors) "1" else null)
-
-    // CardDAV settings
-
-    fun getGroupMethod(): GroupMethod {
-        val name = settingsManager.getString(KEY_CONTACT_GROUP_METHOD) ?:
-                accountManager.getUserData(account, KEY_CONTACT_GROUP_METHOD)
-        if (name != null)
-            try {
-                return GroupMethod.valueOf(name)
-            }
-            catch (_: IllegalArgumentException) {
-            }
-        return GroupMethod.GROUP_VCARDS
-    }
-
-    fun setGroupMethod(method: GroupMethod) {
-        accountManager.setAndVerifyUserData(account, KEY_CONTACT_GROUP_METHOD, method.name)
-    }
-
-
-    // UI settings
-
-    data class ShowOnlyPersonal(
-        val onlyPersonal: Boolean,
-        val locked: Boolean
-    )
-
-    fun getShowOnlyPersonal(): ShowOnlyPersonal {
-        @Suppress("DEPRECATION")
-        val pair = getShowOnlyPersonalPair()
-        return ShowOnlyPersonal(onlyPersonal = pair.first, locked = !pair.second)
-    }
-
-    /**
-     * Whether only personal collections should be shown.
-     *
-     * @return [Pair] of values:
-     *
-     *   1. (first) whether only personal collections should be shown
-     *   2. (second) whether the user shall be able to change the setting (= setting not locked)
-     */
-    @Deprecated("Use getShowOnlyPersonal() instead", replaceWith = ReplaceWith("getShowOnlyPersonal()"))
-    fun getShowOnlyPersonalPair(): Pair<Boolean, Boolean> =
-            when (settingsManager.getIntOrNull(KEY_SHOW_ONLY_PERSONAL)) {
-                0 -> Pair(false, false)
-                1 -> Pair(true, false)
-                else /* including -1 */ -> Pair(accountManager.getUserData(account, KEY_SHOW_ONLY_PERSONAL) != null, true)
-            }
-
-    fun setShowOnlyPersonal(showOnlyPersonal: Boolean) {
-        accountManager.setAndVerifyUserData(account, KEY_SHOW_ONLY_PERSONAL, if (showOnlyPersonal) "1" else null)
-    }
-
-
-    // update from previous account settings
-
-    private fun update(baseVersion: Int) {
-        for (toVersion in baseVersion+1 ..CURRENT_VERSION) {
-            val fromVersion = toVersion-1
-            logger.info("Updating account ${account.name} from version $fromVersion to $toVersion")
-            try {
-                val migrations = migrationsFactory.create(
-                    account = account,
-                    accountSettings = this
-                )
-                val updateProc = AccountSettingsMigrations::class.java.getDeclaredMethod("update_${fromVersion}_$toVersion")
-                updateProc.invoke(migrations)
-
-                logger.info("Account version update successful")
-                accountManager.setAndVerifyUserData(account, KEY_SETTINGS_VERSION, toVersion.toString())
-            } catch (e: Exception) {
-                logger.log(Level.SEVERE, "Couldn't update account settings", e)
-            }
-        }
-    }
-
-    companion object {
-
-        const val CURRENT_VERSION = 17
-        const val KEY_SETTINGS_VERSION = "version"
-
-        const val KEY_SYNC_INTERVAL_ADDRESSBOOKS = "sync_interval_addressbooks"
-        const val KEY_SYNC_INTERVAL_CALENDARS = "sync_interval_calendars"
-
-        /** Stores the tasks sync interval (in seconds) so that it can be set again when the provider is switched */
-        const val KEY_SYNC_INTERVAL_TASKS = "sync_interval_tasks"
-
-        const val KEY_USERNAME = "user_name"
-        const val KEY_CERTIFICATE_ALIAS = "certificate_alias"
-
-        /** OAuth [AuthState] (serialized as JSON) */
-        const val KEY_AUTH_STATE = "auth_state"
-
-        const val KEY_WIFI_ONLY = "wifi_only"               // sync on WiFi only (default: false)
-        const val KEY_WIFI_ONLY_SSIDS = "wifi_only_ssids"   // restrict sync to specific WiFi SSIDs
-        const val KEY_IGNORE_VPNS = "ignore_vpns"           // ignore vpns at connection detection
-
-        /** Time range limitation to the past [in days]. Values:
-         *
-         * - null: default value (DEFAULT_TIME_RANGE_PAST_DAYS)
-         * - <0 (typically -1): no limit
-         * - n>0: entries more than n days in the past won't be synchronized
-         */
-        const val KEY_TIME_RANGE_PAST_DAYS = "time_range_past_days"
-        const val DEFAULT_TIME_RANGE_PAST_DAYS = 90
-
-        /**
-         * Whether a default alarm shall be assigned to received events/tasks which don't have an alarm.
-         * Value can be null (no default alarm) or an integer (default alarm shall be created this
-         * number of minutes before the event/task).
-         */
-        const val KEY_DEFAULT_ALARM = "default_alarm"
-
-        /** Whether DAVx5 sets the local calendar color to the value from service DB at every sync
-        value = *null* (not existing): true (default);
-        "0"                    false */
-        const val KEY_MANAGE_CALENDAR_COLORS = "manage_calendar_colors"
-
-        /** Whether DAVx5 populates and uses CalendarContract.Colors
-        value = *null* (not existing)   false (default);
-        "1"                     true */
-        const val KEY_EVENT_COLORS = "event_colors"
-
-        /** Contact group method:
-         *null (not existing)*     groups as separate vCards (default);
-        "CATEGORIES"              groups are per-contact CATEGORIES
-         */
-        const val KEY_CONTACT_GROUP_METHOD = "contact_group_method"
-
-        /** UI preference: Show only personal collections
-        value = *null* (not existing)   show all collections (default);
-        "1"                             show only personal collections */
-        const val KEY_SHOW_ONLY_PERSONAL = "show_only_personal"
-
-        const val SYNC_INTERVAL_MANUALLY = -1L
-
-        /** Static property to indicate whether AccountSettings migration is currently running.
-         * **Access must be `synchronized` with `AccountSettings::class.java`.** */
-        @Volatile
-        var currentlyUpdating = false
-
-        fun initialUserData(credentials: Credentials?): Bundle {
-            val bundle = Bundle()
-            bundle.putString(KEY_SETTINGS_VERSION, CURRENT_VERSION.toString())
-
-            if (credentials != null) {
-                if (credentials.username != null)
-                    bundle.putString(KEY_USERNAME, credentials.username)
-
-                if (credentials.certificateAlias != null)
-                    bundle.putString(KEY_CERTIFICATE_ALIAS, credentials.certificateAlias)
-
-                if (credentials.authState != null)
-                    bundle.putString(KEY_AUTH_STATE, credentials.authState.jsonSerializeString())
-            }
-
-            return bundle
-        }
-
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/settings/AccountSettingsMigrations.kt

@@ -1,423 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.settings
-
-import android.accounts.Account
-import android.accounts.AccountManager
-import android.annotation.SuppressLint
-import android.content.ContentResolver
-import android.content.ContentUris
-import android.content.ContentValues
-import android.content.Context
-import android.content.pm.PackageManager
-import android.provider.CalendarContract
-import android.provider.ContactsContract
-import android.util.Base64
-import androidx.core.content.ContextCompat
-import androidx.preference.PreferenceManager
-import androidx.work.WorkManager
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.db.AppDatabase
-import at.bitfire.davdroid.db.Service
-import at.bitfire.davdroid.repository.AccountRepository
-import at.bitfire.davdroid.repository.DavCollectionRepository
-import at.bitfire.davdroid.repository.DavServiceRepository
-import at.bitfire.davdroid.resource.LocalAddressBook
-import at.bitfire.davdroid.resource.LocalTask
-import at.bitfire.davdroid.sync.SyncUtils
-import at.bitfire.davdroid.sync.TasksAppManager
-import at.bitfire.davdroid.sync.worker.SyncWorkerManager
-import at.bitfire.davdroid.util.setAndVerifyUserData
-import at.bitfire.ical4android.AndroidCalendar
-import at.bitfire.ical4android.AndroidEvent
-import at.bitfire.ical4android.TaskProvider
-import at.bitfire.ical4android.UnknownProperty
-import at.techbee.jtx.JtxContract.asSyncAdapter
-import dagger.Lazy
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedFactory
-import dagger.assisted.AssistedInject
-import dagger.hilt.android.qualifiers.ApplicationContext
-import net.fortuna.ical4j.model.Property
-import net.fortuna.ical4j.model.property.Url
-import org.dmfs.tasks.contract.TaskContract
-import java.io.ByteArrayInputStream
-import java.io.ObjectInputStream
-import java.util.logging.Level
-import java.util.logging.Logger
-
-class AccountSettingsMigrations @AssistedInject constructor(
-    @Assisted val account: Account,
-    @Assisted val accountSettings: AccountSettings,
-    @ApplicationContext val context: Context,
-    private val accountRepository: AccountRepository,
-    private val collectionRepository: DavCollectionRepository,
-    private val db: AppDatabase,
-    private val localAddressBookFactory: LocalAddressBook.Factory,
-    private val logger: Logger,
-    private val serviceRepository: DavServiceRepository,
-    private val syncWorkerManager: SyncWorkerManager,
-    private val tasksAppManager: Lazy<TasksAppManager>
-) {
-
-    @AssistedFactory
-    interface Factory {
-        fun create(account: Account, accountSettings: AccountSettings): AccountSettingsMigrations
-    }
-
-    val accountManager: AccountManager = AccountManager.get(context)
-
-    /**
-     * With DAVx5 4.3.3 address book account names now contain the collection ID as a unique
-     * identifier. We need to update the address book account names.
-     */
-    @Suppress("unused","FunctionName")
-    fun update_16_17() {
-        val addressBookAccountType = context.getString(R.string.account_type_address_book)
-        try {
-            context.contentResolver.acquireContentProviderClient(ContactsContract.AUTHORITY)
-        } catch (e: SecurityException) {
-            // Not setting the collection ID will cause the address books to removed and fully re-synced as soon as there are permissions.
-            logger.log(Level.WARNING, "Missing permissions for contacts authority, won't set collection ID for address books", e)
-            null
-        }?.use { provider ->
-            val service = serviceRepository.getByAccountAndType(account.name, Service.TYPE_CARDDAV) ?: return
-
-            // Get all old address books of this account, i.e. the ones which have a "real_account_name" of this account.
-            // After this migration is run, address books won't be associated to accounts anymore but only to their respective collection/URL.
-            val oldAddressBookAccounts = accountManager.getAccountsByType(addressBookAccountType)
-                .filter { addressBookAccount ->
-                    account.name == accountManager.getUserData(addressBookAccount, "real_account_name")
-                }
-
-            for (oldAddressBookAccount in oldAddressBookAccounts) {
-                // Old address books only have a URL, so use it to determine the collection ID
-                logger.info("Migrating address book ${oldAddressBookAccount.name}")
-                val url = accountManager.getUserData(oldAddressBookAccount, LocalAddressBook.USER_DATA_URL)
-                collectionRepository.getByServiceAndUrl(service.id, url)?.let { collection ->
-                    // Set collection ID and rename the account
-                    val localAddressBook = localAddressBookFactory.create(oldAddressBookAccount, provider)
-                    localAddressBook.update(collection)
-                }
-            }
-        }
-    }
-
-    /**
-     * Between DAVx5 4.4.1-beta.1 and 4.4.1-rc.1 (both v15), the periodic sync workers were renamed (moved to another
-     * package) and thus automatic synchronization stopped (because the enqueued workers rely on the full class
-     * name and no new workers were enqueued). Here we enqueue all periodic sync workers again with the correct class name.
-     */
-    @Suppress("unused","FunctionName")
-    fun update_15_16() {
-        for (authority in SyncUtils.syncAuthorities(context)) {
-            logger.info("Re-enqueuing periodic sync workers for $account/$authority, if necessary")
-
-            /* A maybe existing periodic worker references the old class name (even if it failed and/or is not active). So
-            we need to explicitly disable and prune all workers. Just updating the worker is not enough – WorkManager will update
-            the work details, but not the class name. */
-            val disableOp = syncWorkerManager.disablePeriodic(account, authority)
-            disableOp.result.get()  // block until worker with old name is disabled
-
-            val pruneOp = WorkManager.getInstance(context).pruneWork()
-            pruneOp.result.get()    // block until worker with old name is removed from DB
-
-            val interval = accountSettings.getSyncInterval(authority)
-            if (interval != null && interval != AccountSettings.SYNC_INTERVAL_MANUALLY) {
-                // There's a sync interval for this account/authority; a periodic sync worker should be there, too.
-                val onlyWifi = accountSettings.getSyncWifiOnly()
-                syncWorkerManager.enablePeriodic(account, authority, interval, onlyWifi)
-            }
-        }
-    }
-
-
-    /**
-     * Updates the periodic sync workers by re-setting the same sync interval.
-     *
-     * The goal is to add the [BaseSyncWorker.commonTag] to all existing periodic sync workers so that they can be detected by
-     * the new [BaseSyncWorker.exists] and [at.bitfire.davdroid.ui.AccountsActivity.Model].
-     */
-    @Suppress("unused","FunctionName")
-    fun update_14_15() {
-        for (authority in SyncUtils.syncAuthorities(context)) {
-            val interval = accountSettings.getSyncInterval(authority)
-            accountSettings.setSyncInterval(authority, interval ?: AccountSettings.SYNC_INTERVAL_MANUALLY)
-        }
-    }
-
-    /**
-     * Disables all sync adapter periodic syncs for every authority. Then enables
-     * corresponding PeriodicSyncWorkers
-     */
-    @Suppress("unused","FunctionName")
-    fun update_13_14() {
-        // Cancel any potentially running syncs for this account (sync framework)
-        ContentResolver.cancelSync(account, null)
-
-        val authorities = listOf(
-            context.getString(R.string.address_books_authority),
-            CalendarContract.AUTHORITY,
-            TaskProvider.ProviderName.JtxBoard.authority,
-            TaskProvider.ProviderName.OpenTasks.authority,
-            TaskProvider.ProviderName.TasksOrg.authority
-        )
-
-        for (authority in authorities) {
-            // Enable PeriodicSyncWorker (WorkManager), with known intervals
-            v14_enableWorkManager(authority)
-            // Disable periodic syncs (sync adapter framework)
-            v14_disableSyncFramework(authority)
-        }
-    }
-    private fun v14_enableWorkManager(authority: String) {
-        val enabled = accountSettings.getSyncInterval(authority)?.let { syncInterval ->
-            accountSettings.setSyncInterval(authority, syncInterval)
-        } ?: false
-        logger.info("PeriodicSyncWorker for $account/$authority enabled=$enabled")
-    }
-    private fun v14_disableSyncFramework(authority: String) {
-        // Disable periodic syncs (sync adapter framework)
-        val disable: () -> Boolean = {
-            /* Ugly hack: because there is no callback for when the sync status/interval has been
-            updated, we need to make this call blocking. */
-            for (sync in ContentResolver.getPeriodicSyncs(account, authority))
-                ContentResolver.removePeriodicSync(sync.account, sync.authority, sync.extras)
-
-            // check whether syncs are really disabled
-            var result = true
-            for (sync in ContentResolver.getPeriodicSyncs(account, authority)) {
-                logger.info("Sync framework still has a periodic sync for $account/$authority: $sync")
-                result = false
-            }
-            result
-        }
-        // try up to 10 times with 100 ms pause
-        var success = false
-        for (idxTry in 0 until 10) {
-            success = disable()
-            if (success)
-                break
-            Thread.sleep(200)
-        }
-        logger.info("Sync framework periodic syncs for $account/$authority disabled=$success")
-    }
-
-    @Suppress("unused","FunctionName")
-    /**
-     * Not a per-account migration, but not a database migration, too, so it fits best there.
-     * Best future solution would be that SettingsManager manages versions and migrations.
-     *
-     * Updates proxy settings from override_proxy_* to proxy_type, proxy_host, proxy_port.
-     */
-    private fun update_12_13() {
-        // proxy settings are managed by SharedPreferencesProvider
-        val preferences = PreferenceManager.getDefaultSharedPreferences(context)
-
-        // old setting names
-        val overrideProxy = "override_proxy"
-        val overrideProxyHost = "override_proxy_host"
-        val overrideProxyPort = "override_proxy_port"
-
-        val edit = preferences.edit()
-        if (preferences.contains(overrideProxy)) {
-            if (preferences.getBoolean(overrideProxy, false))
-            // override_proxy set, migrate to proxy_type = HTTP
-                edit.putInt(Settings.PROXY_TYPE, Settings.PROXY_TYPE_HTTP)
-            edit.remove(overrideProxy)
-        }
-        if (preferences.contains(overrideProxyHost)) {
-            preferences.getString(overrideProxyHost, null)?.let { host ->
-                edit.putString(Settings.PROXY_HOST, host)
-            }
-            edit.remove(overrideProxyHost)
-        }
-        if (preferences.contains(overrideProxyPort)) {
-            val port = preferences.getInt(overrideProxyPort, 0)
-            if (port != 0)
-                edit.putInt(Settings.PROXY_PORT, port)
-            edit.remove(overrideProxyPort)
-        }
-        edit.apply()
-    }
-
-
-    @Suppress("unused","FunctionName")
-    /**
-     * Store event URLs as URL (extended property) instead of unknown property. At the same time,
-     * convert legacy unknown properties to the current format.
-     */
-    private fun update_11_12() {
-        if (ContextCompat.checkSelfPermission(context, android.Manifest.permission.WRITE_CALENDAR) == PackageManager.PERMISSION_GRANTED) {
-            context.contentResolver.acquireContentProviderClient(CalendarContract.AUTHORITY)?.use { provider ->
-                // Attention: CalendarProvider does NOT limit the results of the ExtendedProperties query
-                // to the given account! So all extended properties will be processed number-of-accounts times.
-                val extUri = CalendarContract.ExtendedProperties.CONTENT_URI.asSyncAdapter(account)
-
-                provider.query(
-                    extUri, arrayOf(
-                        CalendarContract.ExtendedProperties._ID,     // idx 0
-                        CalendarContract.ExtendedProperties.NAME,    // idx 1
-                        CalendarContract.ExtendedProperties.VALUE    // idx 2
-                    ), null, null, null
-                )?.use { cursor ->
-                    while (cursor.moveToNext()) {
-                        val id = cursor.getLong(0)
-                        val rawValue = cursor.getString(2)
-
-                        val uri by lazy {
-                            ContentUris.withAppendedId(CalendarContract.ExtendedProperties.CONTENT_URI, id).asSyncAdapter(account)
-                        }
-
-                        when (cursor.getString(1)) {
-                            UnknownProperty.CONTENT_ITEM_TYPE -> {
-                                // unknown property; check whether it's a URL
-                                try {
-                                    val property = UnknownProperty.fromJsonString(rawValue)
-                                    if (property is Url) {  // rewrite to MIMETYPE_URL
-                                        val newValues = ContentValues(2)
-                                        newValues.put(CalendarContract.ExtendedProperties.NAME, AndroidEvent.EXTNAME_URL)
-                                        newValues.put(CalendarContract.ExtendedProperties.VALUE, property.value)
-                                        provider.update(uri, newValues, null, null)
-                                    }
-                                } catch (e: Exception) {
-                                    logger.log(
-                                        Level.WARNING,
-                                        "Couldn't rewrite URL from unknown property to ${AndroidEvent.EXTNAME_URL}",
-                                        e
-                                    )
-                                }
-                            }
-
-                            "unknown-property" -> {
-                                // unknown property (deprecated format); convert to current format
-                                try {
-                                    val stream = ByteArrayInputStream(Base64.decode(rawValue, Base64.NO_WRAP))
-                                    ObjectInputStream(stream).use {
-                                        (it.readObject() as? Property)?.let { property ->
-                                            // rewrite to current format
-                                            val newValues = ContentValues(2)
-                                            newValues.put(CalendarContract.ExtendedProperties.NAME, UnknownProperty.CONTENT_ITEM_TYPE)
-                                            newValues.put(CalendarContract.ExtendedProperties.VALUE, UnknownProperty.toJsonString(property))
-                                            provider.update(uri, newValues, null, null)
-                                        }
-                                    }
-                                } catch (e: Exception) {
-                                    logger.log(Level.WARNING, "Couldn't rewrite deprecated unknown property to current format", e)
-                                }
-                            }
-
-                            "unknown-property.v2" -> {
-                                // unknown property (deprecated MIME type); rewrite to current MIME type
-                                val newValues = ContentValues(1)
-                                newValues.put(CalendarContract.ExtendedProperties.NAME, UnknownProperty.CONTENT_ITEM_TYPE)
-                                provider.update(uri, newValues, null, null)
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-    @Suppress("unused","FunctionName")
-    /**
-     * The tasks sync interval should be stored in account settings. It's used to set the sync interval
-     * again when the tasks provider is switched.
-     */
-    private fun update_10_11() {
-        tasksAppManager.get().currentProvider()?.let { provider ->
-            val interval = accountSettings.getSyncInterval(provider.authority)
-            if (interval != null)
-                accountManager.setAndVerifyUserData(account,
-                    AccountSettings.KEY_SYNC_INTERVAL_TASKS, interval.toString())
-        }
-    }
-
-    @Suppress("unused","FunctionName")
-    /**
-     * Task synchronization now handles alarms, categories, relations and unknown properties.
-     * Setting task ETags to null will cause them to be downloaded (and parsed) again.
-     *
-     * Also update the allowed reminder types for calendars.
-     **/
-    private fun update_9_10() {
-        TaskProvider.acquire(context, TaskProvider.ProviderName.OpenTasks)?.use { provider ->
-            val tasksUri = provider.tasksUri().asSyncAdapter(account)
-            val emptyETag = ContentValues(1)
-            emptyETag.putNull(LocalTask.COLUMN_ETAG)
-            provider.client.update(tasksUri, emptyETag, "${TaskContract.Tasks._DIRTY}=0 AND ${TaskContract.Tasks._DELETED}=0", null)
-        }
-
-        if (ContextCompat.checkSelfPermission(context, android.Manifest.permission.WRITE_CALENDAR) == PackageManager.PERMISSION_GRANTED)
-            context.contentResolver.acquireContentProviderClient(CalendarContract.AUTHORITY)?.use { provider ->
-                provider.update(
-                    CalendarContract.Calendars.CONTENT_URI.asSyncAdapter(account),
-                    AndroidCalendar.calendarBaseValues, null, null)
-            }
-    }
-
-    @Suppress("unused","FunctionName")
-    /**
-     * It seems that somehow some non-CalDAV accounts got OpenTasks syncable, which caused battery problems.
-     * Disable it on those accounts for the future.
-     */
-    private fun update_8_9() {
-        val hasCalDAV = db.serviceDao().getByAccountAndType(account.name, Service.TYPE_CALDAV) != null
-        if (!hasCalDAV && ContentResolver.getIsSyncable(account, TaskProvider.ProviderName.OpenTasks.authority) != 0) {
-            logger.info("Disabling OpenTasks sync for $account")
-            ContentResolver.setIsSyncable(account, TaskProvider.ProviderName.OpenTasks.authority, 0)
-        }
-    }
-
-    @Suppress("unused","FunctionName")
-    @SuppressLint("Recycle")
-    /**
-     * There is a mistake in this method. [TaskContract.Tasks.SYNC_VERSION] is used to store the
-     * SEQUENCE and should not be used for the eTag.
-     */
-    private fun update_7_8() {
-        TaskProvider.acquire(context, TaskProvider.ProviderName.OpenTasks)?.use { provider ->
-            // ETag is now in sync_version instead of sync1
-            // UID  is now in _uid         instead of sync2
-            provider.client.query(provider.tasksUri().asSyncAdapter(account),
-                arrayOf(TaskContract.Tasks._ID, TaskContract.Tasks.SYNC1, TaskContract.Tasks.SYNC2),
-                "${TaskContract.Tasks.ACCOUNT_TYPE}=? AND ${TaskContract.Tasks.ACCOUNT_NAME}=?",
-                arrayOf(account.type, account.name), null)!!.use { cursor ->
-                while (cursor.moveToNext()) {
-                    val id = cursor.getLong(0)
-                    val eTag = cursor.getString(1)
-                    val uid = cursor.getString(2)
-                    val values = ContentValues(4)
-                    values.put(TaskContract.Tasks._UID, uid)
-                    values.put(TaskContract.Tasks.SYNC_VERSION, eTag)
-                    values.putNull(TaskContract.Tasks.SYNC1)
-                    values.putNull(TaskContract.Tasks.SYNC2)
-                    logger.log(Level.FINER, "Updating task $id", values)
-                    provider.client.update(
-                        ContentUris.withAppendedId(provider.tasksUri(), id).asSyncAdapter(account),
-                        values, null, null)
-                }
-            }
-        }
-    }
-
-    @Suppress("unused")
-    @SuppressLint("Recycle")
-    private fun update_6_7() {
-        // add calendar colors
-        context.contentResolver.acquireContentProviderClient(CalendarContract.AUTHORITY)?.use { provider ->
-            AndroidCalendar.insertColors(provider, account)
-        }
-
-        // update allowed WiFi settings key
-        val onlySSID = accountManager.getUserData(account, "wifi_only_ssid")
-        accountManager.setAndVerifyUserData(account, AccountSettings.KEY_WIFI_ONLY_SSIDS, onlySSID)
-        accountManager.setAndVerifyUserData(account, "wifi_only_ssid", null)
-    }
-
-    // updates from AccountSettings version 5 and below are not supported anymore
-
-}

app/src/main/kotlin/at/bitfire/davdroid/sync/AddressBookSyncer.kt

@@ -1,139 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.sync
-
-import android.accounts.Account
-import android.content.ContentProviderClient
-import android.content.SyncResult
-import android.provider.ContactsContract
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.Service
-import at.bitfire.davdroid.network.HttpClient
-import at.bitfire.davdroid.resource.LocalAddressBook
-import at.bitfire.davdroid.settings.Settings
-import at.bitfire.davdroid.settings.SettingsManager
-import at.bitfire.davdroid.util.setAndVerifyUserData
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedFactory
-import dagger.assisted.AssistedInject
-import java.util.logging.Level
-
-/**
- * Sync logic for address books
- */
-class AddressBookSyncer @AssistedInject constructor(
-    @Assisted account: Account,
-    @Assisted extras: Array<String>,
-    @Assisted syncResult: SyncResult,
-    private val contactsSyncManagerFactory: ContactsSyncManager.Factory,
-    settingsManager: SettingsManager
-): Syncer<LocalAddressBook>(account, extras, syncResult) {
-
-    @AssistedFactory
-    interface Factory {
-        fun create(account: Account, extras: Array<String>, syncResult: SyncResult): AddressBookSyncer
-    }
-
-    companion object {
-        const val PREVIOUS_GROUP_METHOD = "previous_group_method"
-    }
-
-    private val forceAllReadOnly = settingsManager.getBoolean(Settings.FORCE_READ_ONLY_ADDRESSBOOKS)
-
-    override val serviceType: String
-        get() = Service.TYPE_CARDDAV
-    override val authority: String
-        get() = ContactsContract.AUTHORITY // Address books use the contacts authority for sync
-
-
-    override fun getLocalCollections(provider: ContentProviderClient): List<LocalAddressBook> =
-        serviceRepository.getByAccountAndType(account.name, serviceType)?.let { service ->
-            // Get _all_ address books; Otherwise address book accounts of unchecked address books will not be removed
-            collectionRepository.getByService(service.id).mapNotNull { collection ->
-                LocalAddressBook.findByCollection(context, provider, collection.id)
-            }
-        }.orEmpty()
-
-    override fun getDbSyncCollections(serviceId: Long): List<Collection> =
-        collectionRepository.getByServiceAndSync(serviceId)
-
-    override fun update(localCollection: LocalAddressBook, remoteCollection: Collection) {
-        try {
-            logger.log(Level.FINE, "Updating local address book ${remoteCollection.url}", remoteCollection)
-            localCollection.update(remoteCollection, forceAllReadOnly)
-        } catch (e: Exception) {
-            logger.log(Level.WARNING, "Couldn't rename address book account", e)
-        }
-    }
-
-    override fun create(provider: ContentProviderClient, remoteCollection: Collection): LocalAddressBook {
-        logger.log(Level.INFO, "Adding local address book", remoteCollection)
-        return LocalAddressBook.create(context, provider, remoteCollection, forceAllReadOnly)
-    }
-
-    override fun syncCollection(provider: ContentProviderClient, localCollection: LocalAddressBook, remoteCollection: Collection) {
-        logger.info("Synchronizing address book $localCollection")
-        syncAddressBook(
-            account = account,
-            addressBook = localCollection,
-            extras = extras,
-            httpClient = httpClient,
-            provider = provider,
-            syncResult = syncResult,
-            collection = remoteCollection
-        )
-    }
-
-    /**
-     * Synchronizes an address book
-     *
-     * @param addressBook local address book
-     * @param extras Sync specific instructions. IE [Syncer.SYNC_EXTRAS_FULL_RESYNC]
-     * @param httpClient
-     * @param provider Content provider to access android contacts
-     * @param syncResult Stores hard and soft sync errors
-     * @param collection The database collection associated with this address book
-     */
-    private fun syncAddressBook(
-        account: Account,
-        addressBook: LocalAddressBook,
-        extras: Array<String>,
-        httpClient: Lazy<HttpClient>,
-        provider: ContentProviderClient,
-        syncResult: SyncResult,
-        collection: Collection
-    ) {
-        try {
-            val accountSettings = accountSettingsFactory.create(account)
-
-            // handle group method change
-            val groupMethod = accountSettings.getGroupMethod().name
-            accountSettings.accountManager.getUserData(addressBook.account, PREVIOUS_GROUP_METHOD)?.let { previousGroupMethod ->
-                if (previousGroupMethod != groupMethod) {
-                    logger.info("Group method changed, deleting all local contacts/groups")
-
-                    // delete all local contacts and groups so that they will be downloaded again
-                    provider.delete(addressBook.syncAdapterURI(ContactsContract.RawContacts.CONTENT_URI), null, null)
-                    provider.delete(addressBook.syncAdapterURI(ContactsContract.Groups.CONTENT_URI), null, null)
-
-                    // reset sync state
-                    addressBook.syncState = null
-                }
-            }
-            accountSettings.accountManager.setAndVerifyUserData(addressBook.account, PREVIOUS_GROUP_METHOD, groupMethod)
-
-            logger.info("Synchronizing address book: ${addressBook.collectionUrl}")
-
-            val syncManager = contactsSyncManagerFactory.contactsSyncManager(account, accountSettings, httpClient.value, extras, authority, syncResult, provider, addressBook, collection)
-            syncManager.performSync()
-
-        } catch(e: Exception) {
-            logger.log(Level.SEVERE, "Couldn't sync contacts", e)
-        }
-
-        logger.info("Contacts sync complete")
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/sync/CalendarSyncManager.kt

@@ -1,279 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.sync
-
-import android.accounts.Account
-import android.content.SyncResult
-import android.text.format.Formatter
-import at.bitfire.dav4jvm.DavCalendar
-import at.bitfire.dav4jvm.MultiResponseCallback
-import at.bitfire.dav4jvm.Response
-import at.bitfire.dav4jvm.exception.DavException
-import at.bitfire.dav4jvm.property.caldav.CalendarData
-import at.bitfire.dav4jvm.property.caldav.GetCTag
-import at.bitfire.dav4jvm.property.caldav.MaxResourceSize
-import at.bitfire.dav4jvm.property.caldav.ScheduleTag
-import at.bitfire.dav4jvm.property.webdav.GetETag
-import at.bitfire.dav4jvm.property.webdav.SupportedReportSet
-import at.bitfire.dav4jvm.property.webdav.SyncToken
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.SyncState
-import at.bitfire.davdroid.network.HttpClient
-import at.bitfire.davdroid.resource.LocalCalendar
-import at.bitfire.davdroid.resource.LocalEvent
-import at.bitfire.davdroid.resource.LocalResource
-import at.bitfire.davdroid.settings.AccountSettings
-import at.bitfire.davdroid.util.DavUtils.lastSegment
-import at.bitfire.ical4android.Event
-import at.bitfire.ical4android.InvalidCalendarException
-import at.bitfire.ical4android.util.DateUtils
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedFactory
-import dagger.assisted.AssistedInject
-import net.fortuna.ical4j.model.Component
-import net.fortuna.ical4j.model.component.VAlarm
-import net.fortuna.ical4j.model.property.Action
-import okhttp3.HttpUrl
-import okhttp3.RequestBody
-import okhttp3.RequestBody.Companion.toRequestBody
-import java.io.ByteArrayOutputStream
-import java.io.Reader
-import java.io.StringReader
-import java.time.Duration
-import java.time.ZonedDateTime
-import java.util.logging.Level
-
-/**
- * Synchronization manager for CalDAV collections; handles events (VEVENT).
- */
-class CalendarSyncManager @AssistedInject constructor(
-    @Assisted account: Account,
-    @Assisted accountSettings: AccountSettings,
-    @Assisted extras: Array<String>,
-    @Assisted httpClient: HttpClient,
-    @Assisted authority: String,
-    @Assisted syncResult: SyncResult,
-    @Assisted localCalendar: LocalCalendar,
-    @Assisted collection: Collection
-): SyncManager<LocalEvent, LocalCalendar, DavCalendar>(
-    account,
-    accountSettings,
-    httpClient,
-    extras,
-    authority,
-    syncResult,
-    localCalendar,
-    collection
-) {
-
-    @AssistedFactory
-    interface Factory {
-        fun calendarSyncManager(
-            account: Account,
-            accountSettings: AccountSettings,
-            extras: Array<String>,
-            httpClient: HttpClient,
-            authority: String,
-            syncResult: SyncResult,
-            localCalendar: LocalCalendar,
-            collection: Collection
-        ): CalendarSyncManager
-    }
-
-    override fun prepare(): Boolean {
-        davCollection = DavCalendar(httpClient.okHttpClient, collection.url)
-
-        // if there are dirty exceptions for events, mark their master events as dirty, too
-        localCollection.processDirtyExceptions()
-
-        // now find dirty events that have no instances and set them to deleted
-        localCollection.deleteDirtyEventsWithoutInstances()
-
-        return true
-    }
-
-    override fun queryCapabilities(): SyncState? =
-        SyncException.wrapWithRemoteResource(collection.url) {
-            var syncState: SyncState? = null
-            davCollection.propfind(0, MaxResourceSize.NAME, SupportedReportSet.NAME, GetCTag.NAME, SyncToken.NAME) { response, relation ->
-                if (relation == Response.HrefRelation.SELF) {
-                    response[MaxResourceSize::class.java]?.maxSize?.let { maxSize ->
-                        logger.info("Calendar accepts events up to ${Formatter.formatFileSize(context, maxSize)}")
-                    }
-
-                    response[SupportedReportSet::class.java]?.let { supported ->
-                        hasCollectionSync = supported.reports.contains(SupportedReportSet.SYNC_COLLECTION)
-                    }
-                    syncState = syncState(response)
-                }
-            }
-
-            logger.info("Calendar supports Collection Sync: $hasCollectionSync")
-            syncState
-        }
-
-    override fun syncAlgorithm() =
-        if (accountSettings.getTimeRangePastDays() != null || !hasCollectionSync)
-            SyncAlgorithm.PROPFIND_REPORT
-        else
-            SyncAlgorithm.COLLECTION_SYNC
-
-    override fun processLocallyDeleted(): Boolean {
-        if (localCollection.readOnly) {
-            var modified = false
-            for (event in localCollection.findDeleted()) {
-                logger.warning("Restoring locally deleted event (read-only calendar!)")
-                SyncException.wrapWithLocalResource(event) {
-                    event.resetDeleted()
-                }
-                modified = true
-            }
-
-            // This is unfortunately ugly: When an event has been inserted to a read-only calendar
-            // it's not enough to force synchronization (by returning true),
-            // but we also need to make sure all events are downloaded again.
-            if (modified)
-                localCollection.lastSyncState = null
-
-            return modified
-        }
-        // mirror deletions to remote collection (DELETE)
-        return super.processLocallyDeleted()
-    }
-
-    override fun uploadDirty(): Boolean {
-        var modified = false
-        if (localCollection.readOnly) {
-            for (event in localCollection.findDirty()) {
-                logger.warning("Resetting locally modified event to ETag=null (read-only calendar!)")
-                SyncException.wrapWithLocalResource(event) {
-                    event.clearDirty(null, null)
-                }
-                modified = true
-            }
-
-            // This is unfortunately ugly: When an event has been inserted to a read-only calendar
-            // it's not enough to force synchronization (by returning true),
-            // but we also need to make sure all events are downloaded again.
-            if (modified)
-                localCollection.lastSyncState = null
-        }
-
-        // generate UID/file name for newly created events
-        val superModified = super.uploadDirty()
-
-        // return true when any operation returned true
-        return modified or superModified
-    }
-
-    override fun generateUpload(resource: LocalEvent): RequestBody =
-        SyncException.wrapWithLocalResource(resource) {
-            val event = requireNotNull(resource.event)
-            logger.log(Level.FINE, "Preparing upload of event ${resource.fileName}", event)
-
-            val os = ByteArrayOutputStream()
-            event.write(os)
-
-            os.toByteArray().toRequestBody(DavCalendar.MIME_ICALENDAR_UTF8)
-        }
-
-    override fun listAllRemote(callback: MultiResponseCallback) {
-        // calculate time range limits
-        val limitStart = accountSettings.getTimeRangePastDays()?.let { pastDays ->
-            ZonedDateTime.now().minusDays(pastDays.toLong()).toInstant()
-        }
-
-        return SyncException.wrapWithRemoteResource(collection.url) {
-            logger.info("Querying events since $limitStart")
-            davCollection.calendarQuery(Component.VEVENT, limitStart, null, callback)
-        }
-    }
-
-    override fun downloadRemote(bunch: List<HttpUrl>) {
-        logger.info("Downloading ${bunch.size} iCalendars: $bunch")
-        SyncException.wrapWithRemoteResource(collection.url) {
-            davCollection.multiget(bunch) { response, _ ->
-                SyncException.wrapWithRemoteResource(response.href) wrapResponse@ {
-                    if (!response.isSuccess()) {
-                        logger.warning("Received non-successful multiget response for ${response.href}")
-                        return@wrapResponse
-                    }
-
-                    val eTag = response[GetETag::class.java]?.eTag
-                            ?: throw DavException("Received multi-get response without ETag")
-                    val scheduleTag = response[ScheduleTag::class.java]?.scheduleTag
-
-                    val calendarData = response[CalendarData::class.java]
-                    val iCal = calendarData?.iCalendar
-                            ?: throw DavException("Received multi-get response without calendar data")
-
-                    processVEvent(
-                        response.href.lastSegment,
-                        eTag,
-                        scheduleTag,
-                        StringReader(iCal)
-                    )
-                }
-            }
-        }
-    }
-
-    override fun postProcess() {}
-
-
-    // helpers
-
-    private fun processVEvent(fileName: String, eTag: String, scheduleTag: String?, reader: Reader) {
-        val events: List<Event>
-        try {
-            events = Event.eventsFromReader(reader)
-        } catch (e: InvalidCalendarException) {
-            logger.log(Level.SEVERE, "Received invalid iCalendar, ignoring", e)
-            notifyInvalidResource(e, fileName)
-            return
-        }
-
-        if (events.size == 1) {
-            val event = events.first()
-
-            // set default reminder for non-full-day events, if requested
-            val defaultAlarmMinBefore = accountSettings.getDefaultAlarm()
-            if (defaultAlarmMinBefore != null && DateUtils.isDateTime(event.dtStart) && event.alarms.isEmpty()) {
-                val alarm = VAlarm(Duration.ofMinutes(-defaultAlarmMinBefore.toLong())).apply {
-                    // Sets METHOD_ALERT instead of METHOD_DEFAULT in the calendar provider.
-                    // Needed for calendars to actually show a notification.
-                    properties += Action.DISPLAY
-                }
-                logger.log(Level.FINE, "${event.uid}: Adding default alarm", alarm)
-                event.alarms += alarm
-            }
-
-            // update local event, if it exists
-            val local = localCollection.findByName(fileName)
-            SyncException.wrapWithLocalResource(local) {
-                if (local != null) {
-                    logger.log(Level.INFO, "Updating $fileName in local calendar", event)
-                    local.eTag = eTag
-                    local.scheduleTag = scheduleTag
-                    local.update(event)
-                    syncResult.stats.numUpdates++
-                } else {
-                    logger.log(Level.INFO, "Adding $fileName to local calendar", event)
-                    val newLocal = LocalEvent(localCollection, event, fileName, eTag, scheduleTag, LocalResource.FLAG_REMOTELY_PRESENT)
-                    SyncException.wrapWithLocalResource(newLocal) {
-                        newLocal.add()
-                    }
-                    syncResult.stats.numInserts++
-                }
-            }
-        } else
-            logger.info("Received VCALENDAR with not exactly one VEVENT with UID and without RECURRENCE-ID; ignoring $fileName")
-    }
-
-    override fun notifyInvalidResourceTitle(): String =
-        context.getString(R.string.sync_invalid_event)
-
-}

app/src/main/kotlin/at/bitfire/davdroid/sync/CalendarSyncer.kt

@@ -1,84 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.sync
-
-import android.accounts.Account
-import android.content.ContentProviderClient
-import android.content.ContentUris
-import android.content.SyncResult
-import android.provider.CalendarContract
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.Service
-import at.bitfire.davdroid.resource.LocalCalendar
-import at.bitfire.ical4android.AndroidCalendar
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedFactory
-import dagger.assisted.AssistedInject
-import java.util.logging.Level
-
-/**
- * Sync logic for calendars
- */
-class CalendarSyncer @AssistedInject constructor(
-    @Assisted account: Account,
-    @Assisted extras: Array<String>,
-    @Assisted syncResult: SyncResult,
-    private val calendarSyncManagerFactory: CalendarSyncManager.Factory
-): Syncer<LocalCalendar>(account, extras, syncResult) {
-
-    @AssistedFactory
-    interface Factory {
-        fun create(account: Account, extras: Array<String>, syncResult: SyncResult): CalendarSyncer
-    }
-
-    override val serviceType: String
-        get() = Service.TYPE_CALDAV
-    override val authority: String
-        get() = CalendarContract.AUTHORITY
-
-
-    override fun getLocalCollections(provider: ContentProviderClient): List<LocalCalendar>
-        = AndroidCalendar.find(account, provider, LocalCalendar.Factory, "${CalendarContract.Calendars.SYNC_EVENTS}!=0", null)
-
-    override fun prepare(provider: ContentProviderClient): Boolean {
-        // Update colors
-        if (accountSettings.getEventColors())
-            AndroidCalendar.insertColors(provider, account)
-        else
-            AndroidCalendar.removeColors(provider, account)
-        return true
-    }
-
-    override fun getDbSyncCollections(serviceId: Long): List<Collection> =
-        collectionRepository.getSyncCalendars(serviceId)
-
-    override fun syncCollection(provider: ContentProviderClient, localCollection: LocalCalendar, remoteCollection: Collection) {
-        logger.info("Synchronizing calendar #${localCollection.id}, URL: ${localCollection.name}")
-
-        val syncManager = calendarSyncManagerFactory.calendarSyncManager(
-            account,
-            accountSettings,
-            extras,
-            httpClient.value,
-            authority,
-            syncResult,
-            localCollection,
-            remoteCollection
-        )
-        syncManager.performSync()
-    }
-
-    override fun update(localCollection: LocalCalendar, remoteCollection: Collection) {
-        logger.log(Level.FINE, "Updating local calendar ${remoteCollection.url}", remoteCollection)
-        localCollection.update(remoteCollection, accountSettings.getManageCalendarColors())
-    }
-
-    override fun create(provider: ContentProviderClient, remoteCollection: Collection): LocalCalendar {
-        logger.log(Level.INFO, "Adding local calendar", remoteCollection)
-        val uri = LocalCalendar.create(account, provider, remoteCollection)
-        return AndroidCalendar.findByID(account, provider, LocalCalendar.Factory, ContentUris.parseId(uri))
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/sync/SyncAdapterServices.kt

@@ -1,189 +0,0 @@
-/***************************************************************************************************
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- **************************************************************************************************/
-
-package at.bitfire.davdroid.sync
-
-import android.accounts.Account
-import android.accounts.AccountManager
-import android.app.Service
-import android.content.AbstractThreadedSyncAdapter
-import android.content.ContentProviderClient
-import android.content.ContentResolver
-import android.content.Context
-import android.content.Intent
-import android.content.SyncResult
-import android.os.Bundle
-import android.os.IBinder
-import android.provider.ContactsContract
-import androidx.work.WorkManager
-import at.bitfire.davdroid.InvalidAccountException
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.repository.DavCollectionRepository
-import at.bitfire.davdroid.repository.DavServiceRepository
-import at.bitfire.davdroid.resource.LocalAddressBook.Companion.USER_DATA_COLLECTION_ID
-import at.bitfire.davdroid.settings.AccountSettings
-import at.bitfire.davdroid.sync.worker.SyncWorkerManager
-import dagger.hilt.android.AndroidEntryPoint
-import dagger.hilt.android.qualifiers.ApplicationContext
-import kotlinx.coroutines.CancellationException
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.cancel
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.runBlocking
-import kotlinx.coroutines.withTimeout
-import java.util.logging.Level
-import java.util.logging.Logger
-import javax.inject.Inject
-import javax.inject.Provider
-
-abstract class SyncAdapterService: Service() {
-
-    @Inject
-    lateinit var syncAdapter: Provider<SyncAdapter>
-
-    override fun onBind(intent: Intent?): IBinder {
-        return syncAdapter.get().syncAdapterBinder
-    }
-
-    /**
-     * Entry point for the sync adapter framework.
-     *
-     * Handles incoming sync requests from the sync adapter framework.
-     *
-     * Although we do not use the sync adapter for syncing anymore, we keep this sole
-     * adapter to provide exported services, which allow android system components and calendar,
-     * contacts or task apps to sync via DAVx5.
-     */
-    class SyncAdapter @Inject constructor(
-        private val accountSettingsFactory: AccountSettings.Factory,
-        private val collectionRepository: DavCollectionRepository,
-        private val serviceRepository: DavServiceRepository,
-        @ApplicationContext context: Context,
-        private val logger: Logger,
-        private val syncConditionsFactory: SyncConditions.Factory,
-        private val syncWorkerManager: SyncWorkerManager
-    ): AbstractThreadedSyncAdapter(
-        context,
-        true    // isSyncable shouldn't be -1 because DAVx5 sets it to 0 or 1.
-                           // However, if it is -1 by accident, set it to 1 to avoid endless sync loops.
-    ) {
-
-        /**
-         * Scope used to wait until the synchronization is finished. Will be cancelled when the sync framework
-         * requests cancellation.
-         */
-        private val waitScope = CoroutineScope(Dispatchers.Default)
-
-        override fun onPerformSync(accountOrAddressBookAccount: Account, extras: Bundle, authority: String, provider: ContentProviderClient, syncResult: SyncResult) {
-            // We have to pass this old SyncFramework extra for an Android 7 workaround
-            val upload = extras.containsKey(ContentResolver.SYNC_EXTRAS_UPLOAD)
-            logger.info("Sync request via sync framework for $accountOrAddressBookAccount $authority (upload=$upload)")
-
-            // If we should sync an address book account - find the account storing the settings
-            val account = if (accountOrAddressBookAccount.type == context.getString(R.string.account_type_address_book))
-                AccountManager.get(context)
-                    .getUserData(accountOrAddressBookAccount, USER_DATA_COLLECTION_ID)
-                    ?.toLongOrNull()
-                    ?.let { collectionId ->
-                    collectionRepository.get(collectionId)?.let { collection ->
-                        serviceRepository.get(collection.serviceId)?.let { service ->
-                            Account(service.accountName, context.getString(R.string.account_type))
-                        }
-                    }
-                }
-            else
-                accountOrAddressBookAccount
-
-            if (account == null) {
-                logger.warning("Address book account $accountOrAddressBookAccount doesn't have an associated collection")
-                return
-            }
-
-            val accountSettings = try {
-                accountSettingsFactory.create(account)
-            } catch (e: InvalidAccountException) {
-                logger.log(Level.WARNING, "Account doesn't exist anymore", e)
-                return
-            }
-
-            val syncConditions = syncConditionsFactory.create(accountSettings)
-            // Should we run the sync at all?
-            if (!syncConditions.wifiConditionsMet()) {
-                logger.info("Sync conditions not met. Aborting sync framework initiated sync")
-                return
-            }
-
-            /* Special case for contacts: because address books are separate accounts, changed contacts cause
-            this method to be called with authority = ContactsContract.AUTHORITY. However the sync worker shall be run for the
-            address book authority instead. */
-            val workerAuthority =
-                if (authority == ContactsContract.AUTHORITY)
-                    context.getString(R.string.address_books_authority)
-                else
-                    authority
-
-            logger.fine("Starting OneTimeSyncWorker for $account $workerAuthority and waiting for it")
-            val workerName = syncWorkerManager.enqueueOneTime(account, authority = workerAuthority, upload = upload)
-
-            /* Because we are not allowed to observe worker state on a background thread, we can not
-            use it to block the sync adapter. Instead we use a Flow to get notified when the sync
-            has finished. */
-            val workManager = WorkManager.getInstance(context)
-
-            try {
-                val waitJob = waitScope.launch {
-                    // wait for finished worker state
-                    workManager.getWorkInfosForUniqueWorkFlow(workerName).collect { info ->
-                        if (info.any { it.state.isFinished })
-                            cancel("$workerName has finished")
-                    }
-                }
-
-                runBlocking {
-                    withTimeout(10 * 60 * 1000) {   // block max. 10 minutes
-                        waitJob.join()              // wait until worker has finished
-                    }
-                }
-            } catch (_: CancellationException) {
-                // waiting for work was cancelled, either by timeout or because the worker has finished
-                logger.fine("Not waiting for OneTimeSyncWorker anymore.")
-            }
-
-            logger.info("Returning to sync framework.")
-        }
-
-        override fun onSecurityException(account: Account, extras: Bundle, authority: String, syncResult: SyncResult) {
-            logger.log(Level.WARNING, "Security exception for $account/$authority")
-        }
-
-        override fun onSyncCanceled() {
-            logger.info("Sync adapter requested cancellation – won't cancel sync, but also won't block sync framework anymore")
-
-            // unblock sync framework
-            waitScope.cancel()
-        }
-
-        override fun onSyncCanceled(thread: Thread) = onSyncCanceled()
-
-    }
-
-}
-
-// exported sync adapter services; we need a separate class for each authority
-
-@AndroidEntryPoint
-class CalendarsSyncAdapterService: SyncAdapterService()
-
-@AndroidEntryPoint
-class ContactsSyncAdapterService: SyncAdapterService()
-
-@AndroidEntryPoint
-class JtxSyncAdapterService: SyncAdapterService()
-
-@AndroidEntryPoint
-class OpenTasksSyncAdapterService: SyncAdapterService()
-
-@AndroidEntryPoint
-class TasksOrgSyncAdapterService: SyncAdapterService()

app/src/main/kotlin/at/bitfire/davdroid/sync/SyncDispatcher.kt

@@ -1,46 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.sync
-
-import android.app.Application
-import kotlinx.coroutines.CoroutineDispatcher
-import kotlinx.coroutines.asCoroutineDispatcher
-import java.util.concurrent.LinkedBlockingQueue
-import java.util.concurrent.ThreadFactory
-import java.util.concurrent.ThreadPoolExecutor
-import java.util.concurrent.TimeUnit
-import javax.inject.Inject
-import javax.inject.Singleton
-
-/**
- * Creates a [CoroutineDispatcher] with multiple threads that guarantees that the threads
- * have set their contextClassLoader to the application context's class loader.
- *
- * We use our own dispatcher to
- *
- * - make sure that all threads have [Thread.getContextClassLoader] set, which is required for ical4j (because it uses [ServiceLoader]),
- * - control the global number of sync threads.
- */
-@Singleton
-class SyncDispatcher @Inject constructor(
-    context: Application
-) {
-
-    val dispatcher = createDispatcher(context.classLoader)
-
-    private fun createDispatcher(classLoader: ClassLoader): CoroutineDispatcher =
-        ThreadPoolExecutor(
-            0, Runtime.getRuntime().availableProcessors(),
-            10, TimeUnit.SECONDS, LinkedBlockingQueue(),
-            object: ThreadFactory {
-                val group = ThreadGroup("sync-work")
-                override fun newThread(r: Runnable) =
-                    Thread(group, r).apply {
-                        contextClassLoader = classLoader
-                    }
-            }
-        ).asCoroutineDispatcher()
-
-}

app/src/main/kotlin/at/bitfire/davdroid/sync/SyncManager.kt

@@ -1,920 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.sync
-
-import android.accounts.Account
-import android.app.PendingIntent
-import android.content.ContentUris
-import android.content.Context
-import android.content.Intent
-import android.content.SyncResult
-import android.net.Uri
-import android.os.DeadObjectException
-import android.os.RemoteException
-import android.provider.CalendarContract
-import android.provider.ContactsContract
-import androidx.core.app.NotificationCompat
-import androidx.core.app.NotificationManagerCompat
-import at.bitfire.dav4jvm.DavCollection
-import at.bitfire.dav4jvm.DavResource
-import at.bitfire.dav4jvm.Error
-import at.bitfire.dav4jvm.MultiResponseCallback
-import at.bitfire.dav4jvm.Response
-import at.bitfire.dav4jvm.exception.ConflictException
-import at.bitfire.dav4jvm.exception.DavException
-import at.bitfire.dav4jvm.exception.ForbiddenException
-import at.bitfire.dav4jvm.exception.GoneException
-import at.bitfire.dav4jvm.exception.HttpException
-import at.bitfire.dav4jvm.exception.NotFoundException
-import at.bitfire.dav4jvm.exception.PreconditionFailedException
-import at.bitfire.dav4jvm.exception.ServiceUnavailableException
-import at.bitfire.dav4jvm.exception.UnauthorizedException
-import at.bitfire.dav4jvm.property.caldav.GetCTag
-import at.bitfire.dav4jvm.property.caldav.ScheduleTag
-import at.bitfire.dav4jvm.property.webdav.GetETag
-import at.bitfire.dav4jvm.property.webdav.SyncToken
-import at.bitfire.davdroid.InvalidAccountException
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.SyncState
-import at.bitfire.davdroid.network.HttpClient
-import at.bitfire.davdroid.repository.AccountRepository
-import at.bitfire.davdroid.repository.DavCollectionRepository
-import at.bitfire.davdroid.repository.DavServiceRepository
-import at.bitfire.davdroid.repository.DavSyncStatsRepository
-import at.bitfire.davdroid.resource.LocalCollection
-import at.bitfire.davdroid.resource.LocalContact
-import at.bitfire.davdroid.resource.LocalEvent
-import at.bitfire.davdroid.resource.LocalResource
-import at.bitfire.davdroid.resource.LocalTask
-import at.bitfire.davdroid.settings.AccountSettings
-import at.bitfire.davdroid.ui.DebugInfoActivity
-import at.bitfire.davdroid.ui.NotificationRegistry
-import at.bitfire.davdroid.ui.account.AccountSettingsActivity
-import at.bitfire.ical4android.CalendarStorageException
-import at.bitfire.ical4android.Ical4Android
-import at.bitfire.ical4android.TaskProvider
-import at.bitfire.vcard4android.ContactsStorageException
-import dagger.hilt.android.qualifiers.ApplicationContext
-import kotlinx.coroutines.coroutineScope
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.runBlocking
-import okhttp3.HttpUrl
-import okhttp3.RequestBody
-import org.dmfs.tasks.contract.TaskContract
-import java.io.IOException
-import java.io.InterruptedIOException
-import java.net.HttpURLConnection
-import java.security.cert.CertificateException
-import java.time.Instant
-import java.util.LinkedList
-import java.util.concurrent.LinkedBlockingQueue
-import java.util.concurrent.atomic.AtomicInteger
-import java.util.logging.Level
-import java.util.logging.Logger
-import javax.inject.Inject
-import javax.net.ssl.SSLHandshakeException
-
-/**
- * Synchronizes a local collection with a remote collection.
- *
- * @param ResourceType      type of local resources
- * @param CollectionType    type of local collection
- * @param RemoteType        type of remote collection
- *
- * @param account           account to synchronize
- * @param accountSettings   account settings of account to synchronize
- * @param httpClient        HTTP client to use for network requests, already authenticated with credentials from [account]
- * @param extras            additional sync parameters
- * @param authority         authority of the content provider the collection shall be synchronized with
- * @param syncResult        receiver for result of the synchronization (will be updated by [performSync])
- * @param localCollection   local collection to synchronize (interface to content provider)
- * @param collection        collection info in the database
- */
-abstract class SyncManager<ResourceType: LocalResource<*>, out CollectionType: LocalCollection<ResourceType>, RemoteType: DavCollection>(
-    val account: Account,
-    val accountSettings: AccountSettings,
-    val httpClient: HttpClient,
-    val extras: Array<String>,
-    val authority: String,
-    val syncResult: SyncResult,
-    val localCollection: CollectionType,
-    val collection: Collection
-) {
-
-    enum class SyncAlgorithm {
-        PROPFIND_REPORT,
-        COLLECTION_SYNC
-    }
-
-    companion object {
-
-        /** Maximum number of resources that are requested with one multiget request. */
-        const val MAX_MULTIGET_RESOURCES = 10
-
-        const val DELAY_UNTIL_DEFAULT = 15*60L      // 15 min
-        const val DELAY_UNTIL_MIN =      1*60L      // 1 min
-        const val DELAY_UNTIL_MAX =     2*60*60L    // 2 hours
-
-        /**
-         * Returns appropriate sync retry delay in seconds, considering the servers suggestion
-         * ([DELAY_UNTIL_DEFAULT] if no server suggestion).
-         *
-         * Takes current time into account to calculate intervals. Interval
-         * will be restricted to values between [DELAY_UNTIL_MIN] and [DELAY_UNTIL_MAX].
-         *
-         * @param retryAfter   optional server suggestion on how long to wait before retrying
-         * @return until when to wait before sync can be retried
-         */
-        fun getDelayUntil(retryAfter: Instant?): Instant {
-            val now = Instant.now()
-
-            if (retryAfter == null)
-                return now.plusSeconds(DELAY_UNTIL_DEFAULT)
-
-            // take server suggestion, but restricted to plausible min/max values
-            val min = now.plusSeconds(DELAY_UNTIL_MIN)
-            val max = now.plusSeconds(DELAY_UNTIL_MAX)
-            return when {
-                min > retryAfter -> min
-                max < retryAfter -> max
-                else -> retryAfter
-            }
-        }
-
-    }
-
-
-    @Inject
-    @ApplicationContext
-    lateinit var context: Context
-
-    @Inject
-    lateinit var logger: Logger
-
-    @Inject
-    lateinit var notificationRegistry: NotificationRegistry
-
-    @Inject
-    lateinit var accountRepository: AccountRepository
-
-    @Inject
-    lateinit var syncStatsRepository: DavSyncStatsRepository
-
-    @Inject
-    lateinit var serviceRepository: DavServiceRepository
-
-    @Inject
-    lateinit var collectionRepository: DavCollectionRepository
-
-
-    init {
-        // required for ServiceLoader -> ical4j -> ical4android
-        Ical4Android.checkThreadContextClassLoader()
-    }
-
-    protected val notificationTag = localCollection.tag
-
-    protected lateinit var davCollection: RemoteType
-
-    protected var hasCollectionSync = false
-
-
-    fun performSync() {
-        // dismiss previous error notifications
-        val nm = NotificationManagerCompat.from(context)
-        nm.cancel(notificationTag, NotificationRegistry.NOTIFY_SYNC_ERROR)
-
-        try {
-            logger.info("Preparing synchronization")
-            if (!prepare()) {
-                logger.info("No reason to synchronize, aborting")
-                return
-            }
-            syncStatsRepository.logSyncTime(collection.id, authority)
-
-            logger.info("Querying server capabilities")
-            var remoteSyncState = queryCapabilities()
-
-            logger.info("Processing local deletes/updates")
-            val modificationsPresent =
-                processLocallyDeleted() or uploadDirty()     // bitwise OR guarantees that both expressions are evaluated
-
-            if (extras.contains(Syncer.SYNC_EXTRAS_FULL_RESYNC)) {
-                logger.info("Forcing re-synchronization of all entries")
-
-                // forget sync state of collection (→ initial sync in case of SyncAlgorithm.COLLECTION_SYNC)
-                localCollection.lastSyncState = null
-                remoteSyncState = null
-
-                // forget sync state of members (→ download all members again and update them locally)
-                localCollection.forgetETags()
-            }
-
-            if (modificationsPresent || syncRequired(remoteSyncState))
-                when (syncAlgorithm()) {
-                    SyncAlgorithm.PROPFIND_REPORT -> {
-                        logger.info("Sync algorithm: full listing as one result (PROPFIND/REPORT)")
-                        resetPresentRemotely()
-
-                        // get current sync state
-                        if (modificationsPresent)
-                            remoteSyncState = querySyncState()
-
-                        // list and process all entries at current sync state (which may be the same as or newer than remoteSyncState)
-                        logger.info("Processing remote entries")
-                        syncRemote { callback ->
-                            listAllRemote(callback)
-                        }
-
-                        logger.info("Deleting entries which are not present remotely anymore")
-                        deleteNotPresentRemotely()
-
-                        logger.info("Post-processing")
-                        postProcess()
-
-                        logger.log(Level.INFO, "Saving sync state", remoteSyncState)
-                        localCollection.lastSyncState = remoteSyncState
-                    }
-
-                    SyncAlgorithm.COLLECTION_SYNC -> {
-                        var syncState = localCollection.lastSyncState?.takeIf { it.type == SyncState.Type.SYNC_TOKEN }
-
-                        var initialSync = false
-                        if (syncState == null) {
-                            logger.info("Starting initial sync")
-                            initialSync = true
-                            resetPresentRemotely()
-                        } else if (syncState.initialSync == true) {
-                            logger.info("Continuing initial sync")
-                            initialSync = true
-                        }
-
-                        var furtherChanges = false
-                        do {
-                            logger.info("Listing changes since $syncState")
-                            syncRemote { callback ->
-                                try {
-                                    val result = listRemoteChanges(syncState, callback)
-                                    syncState = SyncState.fromSyncToken(result.first, initialSync)
-                                    furtherChanges = result.second
-                                } catch (e: HttpException) {
-                                    if (e.errors.contains(Error.VALID_SYNC_TOKEN)) {
-                                        logger.info("Sync token invalid, performing initial sync")
-                                        initialSync = true
-                                        resetPresentRemotely()
-
-                                        val result = listRemoteChanges(null, callback)
-                                        syncState = SyncState.fromSyncToken(result.first, initialSync)
-                                        furtherChanges = result.second
-                                    } else
-                                        throw e
-                                }
-                            }
-
-                            logger.log(Level.INFO, "Saving sync state", syncState)
-                            localCollection.lastSyncState = syncState
-
-                            logger.info("Server has further changes: $furtherChanges")
-                        } while (furtherChanges)
-
-                        if (initialSync) {
-                            // initial sync is finished, remove all local resources which have not been listed by server
-                            logger.info("Deleting local resources which are not on server (anymore)")
-                            deleteNotPresentRemotely()
-
-                            // remove initial sync flag
-                            syncState!!.initialSync = false
-                            logger.log(Level.INFO, "Initial sync completed, saving sync state", syncState)
-                            localCollection.lastSyncState = syncState
-                        }
-
-                        logger.info("Post-processing")
-                        postProcess()
-                    }
-                }
-            else
-                logger.info("Remote collection didn't change, no reason to sync")
-
-        } catch (potentiallyWrappedException: Throwable) {
-            var local: LocalResource<*>? = null
-            var remote: HttpUrl? = null
-
-            val e = SyncException.unwrap(potentiallyWrappedException) {
-                local = it.localResource
-                remote = it.remoteResource
-            }
-
-            when (e) {
-                // DeadObjectException (may occur when syncing takes too long and process is demoted to cached):
-                // re-throw to base Syncer → will cause soft error and restart the sync process
-                is DeadObjectException ->
-                    throw e
-
-                // sync was cancelled or account has been removed: re-throw to BaseSyncer
-                is InterruptedException,
-                is InterruptedIOException,
-                is InvalidAccountException ->
-                    throw e
-
-                // specific I/O errors
-                is SSLHandshakeException -> {
-                    logger.log(Level.WARNING, "SSL handshake failed", e)
-
-                    // when a certificate is rejected by cert4android, the cause will be a CertificateException
-                    if (e.cause !is CertificateException)
-                        notifyException(e, local, remote)
-                }
-
-                // specific HTTP errors
-                is ServiceUnavailableException -> {
-                    logger.log(Level.WARNING, "Got 503 Service unavailable, trying again later", e)
-                    // determine when to retry
-                    syncResult.delayUntil = getDelayUntil(e.retryAfter).epochSecond
-                    syncResult.stats.numIoExceptions++ // Indicate a soft error occurred
-                }
-
-                // all others
-                else ->
-                    notifyException(e, local, remote)
-            }
-        }
-    }
-
-
-    /**
-     * Prepares synchronization. Sets the lateinit property [davCollection].
-     *
-     * @return whether synchronization shall be performed
-     */
-    protected abstract fun prepare(): Boolean
-
-    /**
-     * Queries the server for synchronization capabilities like specific report types,
-     * data formats etc.
-     *
-     * Should also query and save the initial sync state (e.g. CTag/sync-token).
-     *
-     * @return current sync state
-     */
-    protected abstract fun queryCapabilities(): SyncState?
-
-    /**
-     * Processes locally deleted entries. This can mean:
-     *
-     * - forwarding them to the server (HTTP `DELETE`)
-     * - resetting their local state so that they will be downloaded again because they're read-only
-     *
-     * @return whether local resources have been processed so that a synchronization is always necessary
-     */
-    protected open fun processLocallyDeleted(): Boolean {
-        var numDeleted = 0
-
-        // Remove locally deleted entries from server (if they have a name, i.e. if they were uploaded before),
-        // but only if they don't have changed on the server. Then finally remove them from the local address book.
-        val localList = localCollection.findDeleted()
-        for (local in localList) {
-            SyncException.wrapWithLocalResource(local) {
-                val fileName = local.fileName
-                if (fileName != null) {
-                    val lastScheduleTag = local.scheduleTag
-                    val lastETag = if (lastScheduleTag == null) local.eTag else null
-                    logger.info("$fileName has been deleted locally -> deleting from server (ETag $lastETag / schedule-tag $lastScheduleTag)")
-
-                    val url = collection.url.newBuilder().addPathSegment(fileName).build()
-                    val remote = DavResource(httpClient.okHttpClient, url)
-                    SyncException.wrapWithRemoteResource(url) {
-                        try {
-                            remote.delete(ifETag = lastETag, ifScheduleTag = lastScheduleTag) {}
-                            numDeleted++
-                        } catch (e: HttpException) {
-                            logger.warning("Couldn't delete $fileName from server; ignoring (may be downloaded again)")
-                        }
-                    }
-                } else
-                    logger.info("Removing local record #${local.id} which has been deleted locally and was never uploaded")
-                local.delete()
-                syncResult.stats.numDeletes++
-            }
-        }
-        logger.info("Removed $numDeleted record(s) from server")
-        return numDeleted > 0
-    }
-
-    /**
-     * Processes locally modified resources to the server. This can mean:
-     *
-     * - uploading them to the server (HTTP `PUT`)
-     * - resetting their local state so that they will be downloaded again because they're read-only
-     *
-     * @return whether local resources have been processed so that a synchronization is always necessary
-     */
-    protected open fun uploadDirty(): Boolean {
-        var numUploaded = 0
-
-        // upload dirty resources (parallelized)
-        runBlocking {
-            for (local in localCollection.findDirty())
-                launch {
-                    SyncException.wrapWithLocalResource(local) {
-                        uploadDirty(local)
-                        numUploaded++
-                    }
-                }
-        }
-        syncResult.stats.numEntries += numUploaded
-        logger.info("Sent $numUploaded record(s) to server")
-        return numUploaded > 0
-    }
-
-    protected fun uploadDirty(local: ResourceType) {
-        val existingFileName = local.fileName
-
-        var newFileName: String? = null
-        var eTag: String? = null
-        var scheduleTag: String? = null
-        val readTagsFromResponse: (okhttp3.Response) -> Unit = { response ->
-            eTag = GetETag.fromResponse(response)?.eTag
-            scheduleTag = ScheduleTag.fromResponse(response)?.scheduleTag
-        }
-
-        try {
-            if (existingFileName == null) {             // new resource
-                newFileName = local.prepareForUpload()
-
-                val uploadUrl = collection.url.newBuilder().addPathSegment(newFileName).build()
-                val remote = DavResource(httpClient.okHttpClient, uploadUrl)
-                SyncException.wrapWithRemoteResource(uploadUrl) {
-                    logger.info("Uploading new record ${local.id} -> $newFileName")
-                    remote.put(generateUpload(local), ifNoneMatch = true, callback = readTagsFromResponse)
-                }
-
-            } else /* existingFileName != null */ {     // updated resource
-                local.prepareForUpload()
-
-                val uploadUrl = collection.url.newBuilder().addPathSegment(existingFileName).build()
-                val remote = DavResource(httpClient.okHttpClient, uploadUrl)
-                SyncException.wrapWithRemoteResource(uploadUrl) {
-                    val lastScheduleTag = local.scheduleTag
-                    val lastETag = if (lastScheduleTag == null) local.eTag else null
-                    logger.info("Uploading modified record ${local.id} -> $existingFileName (ETag=$lastETag, Schedule-Tag=$lastScheduleTag)")
-                    remote.put(generateUpload(local), ifETag = lastETag, ifScheduleTag = lastScheduleTag, callback = readTagsFromResponse)
-                }
-            }
-        } catch (e: SyncException) {
-            when (val ex = e.cause) {
-                is ForbiddenException -> {
-                    // HTTP 403 Forbidden
-                    // If and only if the upload failed because of missing permissions, treat it like 412.
-                    if (ex.errors.contains(Error.NEED_PRIVILEGES))
-                        logger.log(Level.INFO, "Couldn't upload because of missing permissions, ignoring", ex)
-                    else
-                        throw e
-                }
-                is NotFoundException, is GoneException -> {
-                    // HTTP 404 Not Found (i.e. either original resource or the whole collection is not there anymore)
-                    if (local.scheduleTag != null || local.eTag != null) {      // this was an update of a previously existing resource
-                        logger.info("Original version of locally modified resource is not there (anymore), trying as fresh upload")
-                        if (local.scheduleTag != null)  // contacts don't support scheduleTag, don't try to set it without check
-                            local.scheduleTag = null
-                        local.eTag = null
-                        uploadDirty(local)      // if this fails with 404, too, the collection is gone
-                        return
-                    } else
-                        throw e                 // the collection is probably gone
-                }
-                is ConflictException -> {
-                    // HTTP 409 Conflict
-                    // We can't interact with the user to resolve the conflict, so we treat 409 like 412.
-                    logger.info("Edit conflict, ignoring")
-                }
-                is PreconditionFailedException -> {
-                    // HTTP 412 Precondition failed: Resource has been modified on the server in the meanwhile.
-                    // Ignore this condition so that the resource can be downloaded and reset again.
-                    logger.info("Resource has been modified on the server before upload, ignoring")
-                }
-                else -> throw e
-            }
-        }
-
-        if (eTag != null)
-            logger.fine("Received new ETag=$eTag after uploading")
-        else
-            logger.fine("Didn't receive new ETag after uploading, setting to null")
-
-        local.clearDirty(newFileName, eTag, scheduleTag)
-    }
-
-    /**
-     * Generates the request body (iCalendar or vCard) from a local resource.
-     *
-     * @param resource local resource to generate the body from
-     *
-     * @return iCalendar or vCard (content + Content-Type) that can be uploaded to the server
-     */
-    protected abstract fun generateUpload(resource: ResourceType): RequestBody
-
-
-    /**
-     * Determines whether a sync is required because there were changes on the server.
-     * For instance, this method can compare the collection's `CTag`/`sync-token` with
-     * the last known local value.
-     *
-     * When local changes have been uploaded ([processLocallyDeleted] and/or
-     * [uploadDirty] were true), a sync is always required and this method
-     * should *not* be evaluated.
-     *
-     * Will return _true_ if [Syncer.SYNC_EXTRAS_RESYNC] and/or
-     * [Syncer.SYNC_EXTRAS_FULL_RESYNC] is set in [extras].
-     *
-     * @param state remote sync state to compare local sync state with
-     *
-     * @return whether data has been changed on the server, i.e. whether running the
-     * sync algorithm is required
-     */
-    protected open fun syncRequired(state: SyncState?): Boolean {
-        if (extras.contains(Syncer.SYNC_EXTRAS_RESYNC) ||
-            extras.contains(Syncer.SYNC_EXTRAS_FULL_RESYNC))
-            return true
-
-        val localState = localCollection.lastSyncState
-        logger.info("Local sync state = $localState, remote sync state = $state")
-        return when (state?.type) {
-            SyncState.Type.SYNC_TOKEN -> {
-                val lastKnownToken = localState?.takeIf { it.type == SyncState.Type.SYNC_TOKEN }?.value
-                lastKnownToken != state.value
-            }
-            SyncState.Type.CTAG -> {
-                val lastKnownCTag = localState?.takeIf { it.type == SyncState.Type.CTAG }?.value
-                lastKnownCTag != state.value
-            }
-            else -> true
-        }
-    }
-
-    /**
-     * Determines which sync algorithm to use.
-     * @return
-     *   - [SyncAlgorithm.PROPFIND_REPORT]: list all resources (with plain WebDAV
-     *   PROPFIND or specific REPORT requests), then compare and synchronize
-     *   - [SyncAlgorithm.COLLECTION_SYNC]: use incremental collection synchronization (RFC 6578)
-     */
-    protected abstract fun syncAlgorithm(): SyncAlgorithm
-
-    /**
-     * Marks all local resources which shall be taken into consideration for this
-     * sync as "synchronizing". Purpose of marking is that resources which have been marked
-     * and are not present remotely anymore can be deleted.
-     *
-     * Used together with [deleteNotPresentRemotely].
-     */
-    protected open fun resetPresentRemotely() {
-        val number = localCollection.markNotDirty(0)
-        logger.info("Number of local non-dirty entries: $number")
-    }
-
-    /**
-     * Calls a callback to list remote resources. All resources from the returned
-     * list are downloaded and processed.
-     *
-     * @param listRemote function to list remote resources (for instance, all since a certain sync-token)
-     */
-    protected open fun syncRemote(listRemote: (MultiResponseCallback) -> Unit) {
-        // thread-safe sync stats
-        val nInserted = AtomicInteger()
-        val nUpdated = AtomicInteger()
-        val nDeleted = AtomicInteger()
-        val nSkipped = AtomicInteger()
-
-        runBlocking {
-            // download queue
-            val toDownload = LinkedBlockingQueue<HttpUrl>()
-            fun download(url: HttpUrl?) {
-                if (url != null)
-                    toDownload += url
-
-                if (toDownload.size >= MAX_MULTIGET_RESOURCES || url == null) {
-                    while (toDownload.size > 0) {
-                        val bunch = LinkedList<HttpUrl>()
-                        toDownload.drainTo(bunch, MAX_MULTIGET_RESOURCES)
-                        launch {
-                            downloadRemote(bunch)
-                        }
-                    }
-                }
-            }
-
-            coroutineScope {    // structured concurrency: blocks until all inner coroutines are finished
-                listRemote { response, relation ->
-                    // ignore non-members
-                    if (relation != Response.HrefRelation.MEMBER)
-                        return@listRemote
-
-                    // ignore collections
-                    if (response[at.bitfire.dav4jvm.property.webdav.ResourceType::class.java]?.types?.contains(at.bitfire.dav4jvm.property.webdav.ResourceType.COLLECTION) == true)
-                        return@listRemote
-
-                    val name = response.hrefName()
-
-                    if (response.isSuccess()) {
-                        logger.fine("Found remote resource: $name")
-
-                        launch {
-                            val local = localCollection.findByName(name)
-                            SyncException.wrapWithLocalResource(local) {
-                                if (local == null) {
-                                    logger.info("$name has been added remotely, queueing download")
-                                    download(response.href)
-                                    nInserted.incrementAndGet()
-                                } else {
-                                    val localETag = local.eTag
-                                    val remoteETag = response[GetETag::class.java]?.eTag
-                                        ?: throw DavException("Server didn't provide ETag")
-                                    if (localETag == remoteETag) {
-                                        logger.info("$name has not been changed on server (ETag still $remoteETag)")
-                                        nSkipped.incrementAndGet()
-                                    } else {
-                                        logger.info("$name has been changed on server (current ETag=$remoteETag, last known ETag=$localETag)")
-                                        download(response.href)
-                                        nUpdated.incrementAndGet()
-                                    }
-
-                                    // mark as remotely present, so that this resource won't be deleted at the end
-                                    local.updateFlags(LocalResource.FLAG_REMOTELY_PRESENT)
-                                }
-                            }
-                        }
-
-                    } else if (response.status?.code == HttpURLConnection.HTTP_NOT_FOUND) {
-                        // collection sync: resource has been deleted on remote server
-                        launch {
-                            localCollection.findByName(name)?.let { local ->
-                                SyncException.wrapWithLocalResource(local) {
-                                    logger.info("$name has been deleted on server, deleting locally")
-                                    local.delete()
-                                    nDeleted.incrementAndGet()
-                                }
-                            }
-                        }
-                    }
-                }
-            }
-
-            // download remaining resources
-            download(null)
-        }
-
-        // update sync stats
-        with(syncResult.stats) {
-            numInserts += nInserted.get()
-            numUpdates += nUpdated.get()
-            numDeletes += nDeleted.get()
-            numSkippedEntries += nSkipped.get()
-        }
-    }
-
-    protected abstract fun listAllRemote(callback: MultiResponseCallback)
-
-    protected open fun listRemoteChanges(syncState: SyncState?, callback: MultiResponseCallback): Pair<SyncToken, Boolean> {
-        var furtherResults = false
-
-        val report = davCollection.reportChanges(
-                syncState?.takeIf { syncState.type == SyncState.Type.SYNC_TOKEN }?.value,
-                false, null,
-                GetETag.NAME) { response, relation ->
-            when (relation) {
-                Response.HrefRelation.SELF ->
-                    furtherResults = response.status?.code == 507
-
-                Response.HrefRelation.MEMBER ->
-                    callback.onResponse(response, relation)
-
-                else ->
-                    logger.fine("Unexpected sync-collection response: $response")
-            }
-        }
-
-        var syncToken: SyncToken? = null
-        report.filterIsInstance(SyncToken::class.java).firstOrNull()?.let {
-            syncToken = it
-        }
-        if (syncToken == null)
-            throw DavException("Received sync-collection response without sync-token")
-
-        return Pair(syncToken!!, furtherResults)
-    }
-
-    /**
-     * Downloads and processes resources, given as a list of URLs. Will be called with a list
-     * of changed/new remote resources.
-     *
-     * Implementations should not use GET to fetch single resources, but always multi-get, even
-     * for single resources for these reasons:
-     *
-     *   1. GET can only be used without HTTP compression, because it may change the ETag.
-     *      multi-get sends the ETag in the XML body, so there's no problem with compression.
-     *   2. Some servers are wrongly configured to suppress the ETag header in the response.
-     *      With multi-get, the ETag is in the XML body, so it won't be affected by that.
-     *   3. If there are two methods to download resources (GET and multi-get), both methods
-     *      have to be implemented, tested and maintained. Given that multi-get is required
-     *      in any case, it's better to have only one method.
-     *   4. For users, it's strange behavior when DAVx5 can download multiple remote changes,
-     *      but not a single one (or vice versa). So only one method is more user-friendly.
-     *   5. March 2020: iCloud now crashes with HTTP 500 upon CardDAV GET requests.
-     */
-    protected abstract fun downloadRemote(bunch: List<HttpUrl>)
-
-    /**
-     * Locally deletes entries which are
-     *   1. not dirty and
-     *   2. not marked as [LocalResource.FLAG_REMOTELY_PRESENT].
-     *
-     * Used together with [resetPresentRemotely] when a full listing has been received from
-     * the server to locally delete resources which are not present remotely (anymore).
-     */
-    protected open fun deleteNotPresentRemotely() {
-        val removed = localCollection.removeNotDirtyMarked(0)
-        logger.info("Removed $removed local resources which are not present on the server anymore")
-        syncResult.stats.numDeletes += removed
-    }
-
-    /**
-     * Post-processing of synchronized entries, for instance contact group membership operations.
-     */
-    protected abstract fun postProcess()
-
-
-    // sync helpers
-
-    protected fun syncState(dav: Response) =
-            dav[SyncToken::class.java]?.token?.let {
-                SyncState(SyncState.Type.SYNC_TOKEN, it)
-            } ?:
-            dav[GetCTag::class.java]?.cTag?.let {
-                SyncState(SyncState.Type.CTAG, it)
-            }
-
-    private fun querySyncState(): SyncState? {
-        var state: SyncState? = null
-        davCollection.propfind(0, GetCTag.NAME, SyncToken.NAME) { response, relation ->
-            if (relation == Response.HrefRelation.SELF)
-                state = syncState(response)
-        }
-        return state
-    }
-
-
-    // exception helpers
-
-    private fun notifyException(e: Throwable, local: LocalResource<*>?, remote: HttpUrl?) {
-        notificationRegistry.notifyIfPossible(NotificationRegistry.NOTIFY_SYNC_ERROR, tag = notificationTag) {
-            val message: String
-
-            when (e) {
-                is IOException -> {
-                    logger.log(Level.WARNING, "I/O error", e)
-                    message = context.getString(R.string.sync_error_io, e.localizedMessage)
-                    syncResult.stats.numIoExceptions++
-                }
-
-                is UnauthorizedException -> {
-                    logger.log(Level.SEVERE, "Not authorized anymore", e)
-                    message = context.getString(R.string.sync_error_authentication_failed)
-                    syncResult.stats.numAuthExceptions++
-                }
-
-                is HttpException, is DavException -> {
-                    logger.log(Level.SEVERE, "HTTP/DAV exception", e)
-                    message = context.getString(R.string.sync_error_http_dav, e.localizedMessage)
-                    syncResult.stats.numParseExceptions++       // numIoExceptions would indicate a soft error
-                }
-
-                is CalendarStorageException, is ContactsStorageException, is RemoteException -> {
-                    logger.log(Level.SEVERE, "Couldn't access local storage", e)
-                    message = context.getString(R.string.sync_error_local_storage, e.localizedMessage)
-                    syncResult.databaseError = true
-                }
-
-                else -> {
-                    logger.log(Level.SEVERE, "Unclassified sync error", e)
-                    message = e.localizedMessage ?: e::class.java.simpleName
-                    syncResult.stats.numParseExceptions++
-                }
-            }
-
-            val contentIntent: Intent
-            var viewItemAction: NotificationCompat.Action? = null
-            if (e is UnauthorizedException) {
-                contentIntent = Intent(context, AccountSettingsActivity::class.java)
-                contentIntent.putExtra(
-                    AccountSettingsActivity.EXTRA_ACCOUNT,
-                    account
-                )
-            } else {
-                contentIntent = buildDebugInfoIntent(e, local, remote)
-                if (local != null)
-                    viewItemAction = buildViewItemAction(local)
-            }
-
-            // to make the PendingIntent unique
-            contentIntent.data = Uri.parse("davdroid:exception/${e.hashCode()}")
-
-            val channel: String
-            val priority: Int
-            if (e is IOException) {
-                channel = notificationRegistry.CHANNEL_SYNC_IO_ERRORS
-                priority = NotificationCompat.PRIORITY_MIN
-            } else {
-                channel = notificationRegistry.CHANNEL_SYNC_ERRORS
-                priority = NotificationCompat.PRIORITY_DEFAULT
-            }
-
-            val builder = NotificationCompat.Builder(context, channel)
-            builder.setSmallIcon(R.drawable.ic_sync_problem_notify)
-                .setContentTitle(localCollection.title)
-                .setContentText(message)
-                .setStyle(NotificationCompat.BigTextStyle(builder).bigText(message))
-                .setSubText(account.name)
-                .setOnlyAlertOnce(true)
-                .setContentIntent(
-                    PendingIntent.getActivity(
-                        context,
-                        0,
-                        contentIntent,
-                        PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
-                    )
-                )
-                .setPriority(priority)
-                .setCategory(NotificationCompat.CATEGORY_ERROR)
-            viewItemAction?.let { builder.addAction(it) }
-
-            builder.build()
-        }
-    }
-
-    private fun buildDebugInfoIntent(e: Throwable, local: LocalResource<*>?, remote: HttpUrl?) =
-        DebugInfoActivity.IntentBuilder(context)
-            .withAccount(account)
-            .withAuthority(authority)
-            .withCause(e)
-            .withLocalResource(
-                try {
-                    local?.toString()
-                } catch (e: OutOfMemoryError) {
-                    // for instance because of a huge contact photo; maybe we're lucky and can fetch it
-                    null
-                }
-            )
-            .withRemoteResource(remote)
-            .build()
-
-    private fun buildViewItemAction(local: LocalResource<*>): NotificationCompat.Action? {
-        logger.log(Level.FINE, "Adding view action for local resource", local)
-        val intent = local.id?.let { id ->
-            when (local) {
-                is LocalContact ->
-                    Intent(Intent.ACTION_VIEW, ContentUris.withAppendedId(ContactsContract.RawContacts.CONTENT_URI, id))
-                is LocalEvent ->
-                    Intent(Intent.ACTION_VIEW, ContentUris.withAppendedId(CalendarContract.Events.CONTENT_URI, id))
-                is LocalTask ->
-                    Intent(Intent.ACTION_VIEW, ContentUris.withAppendedId(TaskContract.Tasks.getContentUri(TaskProvider.ProviderName.OpenTasks.authority), id))
-                else ->
-                    null
-            }
-        }
-        return if (intent != null && context.packageManager.resolveActivity(intent, 0) != null)
-            NotificationCompat.Action(android.R.drawable.ic_menu_view, context.getString(R.string.sync_error_view_item),
-                    PendingIntent.getActivity(context, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE))
-        else
-            null
-    }
-
-    protected fun notifyInvalidResource(e: Throwable, fileName: String) {
-        notificationRegistry.notifyIfPossible(NotificationRegistry.NOTIFY_INVALID_RESOURCE, tag = notificationTag) {
-            val intent = buildDebugInfoIntent(e, null, collection.url.resolve(fileName))
-
-            val builder = NotificationCompat.Builder(context, notificationRegistry.CHANNEL_SYNC_WARNINGS)
-            builder.setSmallIcon(R.drawable.ic_warning_notify)
-                .setContentTitle(notifyInvalidResourceTitle())
-                .setContentText(context.getString(R.string.sync_invalid_resources_ignoring))
-                .setSubText(account.name)
-                .setContentIntent(
-                    PendingIntent.getActivity(
-                        context,
-                        0,
-                        intent,
-                        PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
-                    )
-                )
-                .setAutoCancel(true)
-                .setOnlyAlertOnce(true)
-                .priority = NotificationCompat.PRIORITY_LOW
-            builder.build()
-        }
-    }
-
-    protected abstract fun notifyInvalidResourceTitle(): String
-
-}

app/src/main/kotlin/at/bitfire/davdroid/sync/SyncUtils.kt

@@ -1,53 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.sync
-
-import android.content.Context
-import android.provider.CalendarContract
-import at.bitfire.davdroid.R
-import dagger.hilt.EntryPoint
-import dagger.hilt.InstallIn
-import dagger.hilt.android.EntryPointAccessors
-import dagger.hilt.components.SingletonComponent
-
-/**
- * Utility methods related to synchronization management (authorities, workers etc.)
- */
-object SyncUtils {
-
-    @EntryPoint
-    @InstallIn(SingletonComponent::class)
-    interface SyncUtilsEntryPoint {
-        fun tasksAppManager(): TasksAppManager
-    }
-
-    /**
-     * Returns a list of all available sync authorities:
-     *
-     *   1. calendar authority
-     *   2. address books authority
-     *   3. current tasks authority (if available)
-     *
-     * Checking the availability of authorities may be relatively expensive, so the
-     * result should be cached for the current operation.
-     *
-     * @return list of available sync authorities for DAVx5 accounts
-     */
-    fun syncAuthorities(context: Context): List<String> {
-        val result = mutableListOf(
-            CalendarContract.AUTHORITY,
-            context.getString(R.string.address_books_authority)
-        )
-
-        val entryPoint = EntryPointAccessors.fromApplication<SyncUtilsEntryPoint>(context)
-        val tasksAppManager = entryPoint.tasksAppManager()
-        tasksAppManager.currentProvider()?.let { taskProvider ->
-            result += taskProvider.authority
-        }
-
-        return result
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/sync/TasksAppManager.kt

@@ -1,199 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.sync
-
-import android.accounts.Account
-import android.app.PendingIntent
-import android.content.ContentResolver
-import android.content.Context
-import android.content.Intent
-import android.content.pm.PackageManager
-import android.graphics.drawable.BitmapDrawable
-import android.net.Uri
-import androidx.core.app.NotificationCompat
-import at.bitfire.davdroid.InvalidAccountException
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.db.AppDatabase
-import at.bitfire.davdroid.db.Service
-import at.bitfire.davdroid.repository.AccountRepository
-import at.bitfire.davdroid.settings.AccountSettings
-import at.bitfire.davdroid.settings.Settings
-import at.bitfire.davdroid.settings.SettingsManager
-import at.bitfire.davdroid.sync.worker.SyncWorkerManager
-import at.bitfire.davdroid.ui.NotificationRegistry
-import at.bitfire.davdroid.util.PermissionUtils
-import at.bitfire.ical4android.TaskProvider
-import at.bitfire.ical4android.TaskProvider.ProviderName
-import dagger.Lazy
-import dagger.hilt.android.qualifiers.ApplicationContext
-import java.util.logging.Logger
-import javax.inject.Inject
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.flow.SharingStarted
-import kotlinx.coroutines.flow.StateFlow
-import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.flow.stateIn
-
-/**
- * Responsible for setting/getting the currently used tasks app, and for communicating with it.
- */
-class TasksAppManager @Inject constructor(
-    @ApplicationContext val context: Context,
-    private val accountRepository: Lazy<AccountRepository>,
-    private val accountSettingsFactory: AccountSettings.Factory,
-    private val db: AppDatabase,
-    private val logger: Logger,
-    private val notificationRegistry: Lazy<NotificationRegistry>,
-    private val settingsManager: SettingsManager,
-    private val syncWorkerManager: SyncWorkerManager
-) {
-
-    /**
-     * Gets the currently selected tasks app.
-     *
-     * @return currently selected tasks app, or `null` if no tasks app is selected or the selected app is not installed
-     */
-    fun currentProvider(): ProviderName? {
-        val preferredAuthority = settingsManager.getString(Settings.SELECTED_TASKS_PROVIDER) ?: return null
-        return preferredAuthorityToProviderName(preferredAuthority)
-    }
-
-    /**
-     * Like [currentProvider, but as a [StateFlow].
-     */
-    fun currentProviderFlow(externalScope: CoroutineScope): StateFlow<ProviderName?> {
-        return settingsManager.getStringFlow(Settings.SELECTED_TASKS_PROVIDER).map { preferred ->
-            if (preferred != null)
-                preferredAuthorityToProviderName(preferred)
-            else
-                null
-        }.stateIn(scope = externalScope, started = SharingStarted.WhileSubscribed(), initialValue = null)
-    }
-
-    private fun preferredAuthorityToProviderName(preferredAuthority: String): ProviderName? {
-        val packageManager = context.packageManager
-        ProviderName.entries.toTypedArray()
-            .sortedByDescending { it.authority == preferredAuthority }
-            .forEach { providerName ->
-                if (packageManager.resolveContentProvider(providerName.authority, 0) != null)
-                    return providerName
-            }
-        return null
-    }
-
-
-    /**
-     * Sets up sync for the current TaskProvider (and disables sync for unavailable task providers):
-     *
-     * 1. Makes selected tasks authority _syncable_ in the sync framework, all other authorities _not syncable_.
-     * 2. Creates periodic sync worker for selected authority, disables periodic sync workers for all other authorities.
-     * 3. If the permissions don't allow synchronizing with the selected tasks app, a notification is shown.
-     *
-     * Called
-     *
-     * - when a user explicitly selects another task app, or
-     * - when there previously was no (usable) tasks app and [at.bitfire.davdroid.TasksAppWatcher] detected a new one.
-     */
-    fun selectProvider(selectedProvider: ProviderName?) {
-        logger.info("Selecting tasks app: $selectedProvider")
-
-        settingsManager.putString(Settings.SELECTED_TASKS_PROVIDER, selectedProvider?.authority)
-
-        var permissionsRequired = false     // whether additional permissions are required
-
-        // check all accounts and (de)activate task provider(s) if a CalDAV service is defined
-        for (account in accountRepository.get().getAll()) {
-            val hasCalDAV = db.serviceDao().getByAccountAndType(account.name, Service.TYPE_CALDAV) != null
-            for (providerName in TaskProvider.ProviderName.entries) {
-                val syncable = hasCalDAV && providerName == selectedProvider
-
-                // enable/disable sync for the given account and authority
-                setSyncable(
-                    context,
-                    account,
-                    providerName.authority,
-                    syncable
-                )
-
-                // if sync has just been enabled: check whether additional permissions are required
-                if (syncable && !PermissionUtils.havePermissions(context, providerName.permissions))
-                    permissionsRequired = true
-            }
-        }
-
-        if (permissionsRequired) {
-            logger.warning("Tasks synchronization is now enabled for at least one account, but permissions are not granted")
-                notificationRegistry.get().notifyPermissions()
-        }
-    }
-
-    private fun setSyncable(context: Context, account: Account, authority: String, syncable: Boolean) {
-        try {
-            val settings = accountSettingsFactory.create(account)
-            if (syncable) {
-                logger.info("Enabling $authority sync for $account")
-
-                // make account syncable by sync framework
-                ContentResolver.setIsSyncable(account, authority, 1)
-
-                // set sync interval according to settings; also updates periodic sync workers and sync framework on-content-change
-                val interval = settings.getTasksSyncInterval() ?: settingsManager.getLong(Settings.DEFAULT_SYNC_INTERVAL)
-                settings.setSyncInterval(authority, interval)
-            } else {
-                logger.info("Disabling $authority sync for $account")
-
-                // make account not syncable by sync framework
-                ContentResolver.setIsSyncable(account, authority, 0)
-
-                // disable periodic sync worker
-                syncWorkerManager.disablePeriodic(account, authority)
-            }
-        } catch (e: InvalidAccountException) {
-            // account has already been removed, make sure periodic sync is disabled, too
-            syncWorkerManager.disablePeriodic(account, authority)
-        }
-    }
-
-
-    /**
-     * Show a notification that starts an Intent and redirects the user to the tasks app in the app store.
-     *
-     * @param e   the TaskProvider.ProviderTooOldException to be shown
-     */
-    fun notifyProviderTooOld(e: TaskProvider.ProviderTooOldException) {
-        val registry = notificationRegistry.get()
-        registry.notifyIfPossible(NotificationRegistry.NOTIFY_TASKS_PROVIDER_TOO_OLD) {
-            val message = context.getString(R.string.sync_error_tasks_required_version, e.provider.minVersionName)
-
-            val pm = context.packageManager
-            val tasksAppInfo = pm.getPackageInfo(e.provider.packageName, 0)
-            val tasksAppLabel = tasksAppInfo.applicationInfo?.loadLabel(pm)
-
-            val notify = NotificationCompat.Builder(context, registry.CHANNEL_SYNC_ERRORS)
-                .setSmallIcon(R.drawable.ic_sync_problem_notify)
-                .setContentTitle(context.getString(R.string.sync_error_tasks_too_old, tasksAppLabel))
-                .setContentText(message)
-                .setSubText("$tasksAppLabel ${e.installedVersionName}")
-                .setCategory(NotificationCompat.CATEGORY_ERROR)
-
-            try {
-                val icon = pm.getApplicationIcon(e.provider.packageName)
-                if (icon is BitmapDrawable)
-                    notify.setLargeIcon(icon.bitmap)
-            } catch (ignored: PackageManager.NameNotFoundException) {
-                // couldn't get provider app icon
-            }
-
-            val intent = Intent(Intent.ACTION_VIEW, Uri.parse("market://details?id=${e.provider.packageName}"))
-            val flags = PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE
-
-            if (intent.resolveActivity(pm) != null)
-                notify.setContentIntent(PendingIntent.getActivity(context, 0, intent, flags))
-
-            notify.build()
-        }
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/sync/TasksSyncManager.kt

@@ -1,189 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.sync
-
-import android.accounts.Account
-import android.content.SyncResult
-import android.text.format.Formatter
-import at.bitfire.dav4jvm.DavCalendar
-import at.bitfire.dav4jvm.MultiResponseCallback
-import at.bitfire.dav4jvm.Response
-import at.bitfire.dav4jvm.exception.DavException
-import at.bitfire.dav4jvm.property.caldav.CalendarData
-import at.bitfire.dav4jvm.property.caldav.GetCTag
-import at.bitfire.dav4jvm.property.caldav.MaxResourceSize
-import at.bitfire.dav4jvm.property.webdav.GetETag
-import at.bitfire.dav4jvm.property.webdav.SyncToken
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.SyncState
-import at.bitfire.davdroid.network.HttpClient
-import at.bitfire.davdroid.resource.LocalResource
-import at.bitfire.davdroid.resource.LocalTask
-import at.bitfire.davdroid.resource.LocalTaskList
-import at.bitfire.davdroid.settings.AccountSettings
-import at.bitfire.davdroid.util.DavUtils.lastSegment
-import at.bitfire.ical4android.InvalidCalendarException
-import at.bitfire.ical4android.Task
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedFactory
-import dagger.assisted.AssistedInject
-import okhttp3.HttpUrl
-import okhttp3.RequestBody
-import okhttp3.RequestBody.Companion.toRequestBody
-import java.io.ByteArrayOutputStream
-import java.io.Reader
-import java.io.StringReader
-import java.util.logging.Level
-
-/**
- * Synchronization manager for CalDAV collections; handles tasks (VTODO)
- */
-class TasksSyncManager @AssistedInject constructor(
-    @Assisted account: Account,
-    @Assisted accountSettings: AccountSettings,
-    @Assisted httpClient: HttpClient,
-    @Assisted extras: Array<String>,
-    @Assisted authority: String,
-    @Assisted syncResult: SyncResult,
-    @Assisted localCollection: LocalTaskList,
-    @Assisted collection: Collection
-): SyncManager<LocalTask, LocalTaskList, DavCalendar>(
-    account,
-    accountSettings,
-    httpClient,
-    extras,
-    authority,
-    syncResult,
-    localCollection,
-    collection
-) {
-
-    @AssistedFactory
-    interface Factory {
-        fun tasksSyncManager(
-            account: Account,
-            accountSettings: AccountSettings,
-            httpClient: HttpClient,
-            extras: Array<String>,
-            authority: String,
-            syncResult: SyncResult,
-            localCollection: LocalTaskList,
-            collection: Collection
-        ): TasksSyncManager
-    }
-
-
-    override fun prepare(): Boolean {
-        davCollection = DavCalendar(httpClient.okHttpClient, collection.url)
-
-        return true
-    }
-
-    override fun queryCapabilities() =
-        SyncException.wrapWithRemoteResource(collection.url) {
-            var syncState: SyncState? = null
-            davCollection.propfind(0, MaxResourceSize.NAME, GetCTag.NAME, SyncToken.NAME) { response, relation ->
-                if (relation == Response.HrefRelation.SELF) {
-                    response[MaxResourceSize::class.java]?.maxSize?.let { maxSize ->
-                        logger.info("Calendar accepts tasks up to ${Formatter.formatFileSize(context, maxSize)}")
-                    }
-
-                    syncState = syncState(response)
-                }
-            }
-
-            syncState
-        }
-
-    override fun syncAlgorithm() = SyncAlgorithm.PROPFIND_REPORT
-
-    override fun generateUpload(resource: LocalTask): RequestBody =
-        SyncException.wrapWithLocalResource(resource) {
-            val task = requireNotNull(resource.task)
-            logger.log(Level.FINE, "Preparing upload of task ${resource.fileName}", task)
-
-            val os = ByteArrayOutputStream()
-            task.write(os)
-
-            os.toByteArray().toRequestBody(DavCalendar.MIME_ICALENDAR_UTF8)
-        }
-
-    override fun listAllRemote(callback: MultiResponseCallback) {
-        SyncException.wrapWithRemoteResource(collection.url) {
-            logger.info("Querying tasks")
-            davCollection.calendarQuery("VTODO", null, null, callback)
-        }
-    }
-
-    override fun downloadRemote(bunch: List<HttpUrl>) {
-        logger.info("Downloading ${bunch.size} iCalendars: $bunch")
-        // multiple iCalendars, use calendar-multi-get
-        SyncException.wrapWithRemoteResource(collection.url) {
-            davCollection.multiget(bunch) { response, _ ->
-                SyncException.wrapWithRemoteResource(response.href) wrapResource@ {
-                    if (!response.isSuccess()) {
-                        logger.warning("Received non-successful multiget response for ${response.href}")
-                        return@wrapResource
-                    }
-
-                    val eTag = response[GetETag::class.java]?.eTag
-                            ?: throw DavException("Received multi-get response without ETag")
-
-                    val calendarData = response[CalendarData::class.java]
-                    val iCal = calendarData?.iCalendar
-                            ?: throw DavException("Received multi-get response without task data")
-
-                    processVTodo(response.href.lastSegment, eTag, StringReader(iCal))
-                }
-            }
-        }
-    }
-
-    override fun postProcess() {
-        val touched = localCollection.touchRelations()
-        logger.info("Touched $touched relations")
-    }
-
-    // helpers
-
-    private fun processVTodo(fileName: String, eTag: String, reader: Reader) {
-        val tasks: List<Task>
-        try {
-            tasks = Task.tasksFromReader(reader)
-        } catch (e: InvalidCalendarException) {
-            logger.log(Level.SEVERE, "Received invalid iCalendar, ignoring", e)
-            notifyInvalidResource(e, fileName)
-            return
-        }
-
-        if (tasks.size == 1) {
-            val newData = tasks.first()
-
-            // update local task, if it exists
-            val local = localCollection.findByName(fileName)
-            SyncException.wrapWithLocalResource(local) {
-                if (local != null) {
-                    logger.log(Level.INFO, "Updating $fileName in local task list", newData)
-                    local.eTag = eTag
-                    local.update(newData)
-                    syncResult.stats.numUpdates++
-                } else {
-                    logger.log(Level.INFO, "Adding $fileName to local task list", newData)
-                    val newLocal = LocalTask(localCollection, newData, fileName, eTag, LocalResource.FLAG_REMOTELY_PRESENT)
-                    SyncException.wrapWithLocalResource(newLocal) {
-                        newLocal.add()
-                    }
-                    syncResult.stats.numInserts++
-                }
-            }
-        } else
-            logger.info("Received VCALENDAR with not exactly one VTODO; ignoring $fileName")
-    }
-
-    override fun notifyInvalidResourceTitle(): String =
-            context.getString(R.string.sync_invalid_task)
-
-}

app/src/main/kotlin/at/bitfire/davdroid/sync/worker/BaseSyncWorker.kt

@@ -1,327 +0,0 @@
-/***************************************************************************************************
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- **************************************************************************************************/
-
-package at.bitfire.davdroid.sync.worker
-
-import android.accounts.Account
-import android.content.ContentResolver
-import android.content.Context
-import android.content.SyncResult
-import android.os.Build
-import android.provider.CalendarContract
-import androidx.annotation.IntDef
-import androidx.core.app.NotificationCompat
-import androidx.core.app.NotificationManagerCompat
-import androidx.work.CoroutineWorker
-import androidx.work.Data
-import androidx.work.WorkInfo
-import androidx.work.WorkManager
-import androidx.work.WorkQuery
-import androidx.work.WorkerParameters
-import at.bitfire.davdroid.InvalidAccountException
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.push.PushNotificationManager
-import at.bitfire.davdroid.settings.AccountSettings
-import at.bitfire.davdroid.sync.AddressBookSyncer
-import at.bitfire.davdroid.sync.CalendarSyncer
-import at.bitfire.davdroid.sync.JtxSyncer
-import at.bitfire.davdroid.sync.SyncConditions
-import at.bitfire.davdroid.sync.SyncUtils
-import at.bitfire.davdroid.sync.Syncer
-import at.bitfire.davdroid.sync.TaskSyncer
-import at.bitfire.davdroid.ui.NotificationRegistry
-import at.bitfire.ical4android.TaskProvider
-import java.util.Collections
-import java.util.logging.Logger
-import javax.inject.Inject
-import kotlinx.coroutines.CoroutineDispatcher
-import kotlinx.coroutines.delay
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.runInterruptible
-import kotlinx.coroutines.withContext
-
-abstract class BaseSyncWorker(
-    context: Context,
-    private val workerParams: WorkerParameters,
-    private val syncDispatcher: CoroutineDispatcher
-) : CoroutineWorker(context, workerParams) {
-
-    companion object {
-
-        // common worker input parameters
-        const val INPUT_ACCOUNT_NAME = "accountName"
-        const val INPUT_ACCOUNT_TYPE = "accountType"
-        const val INPUT_AUTHORITY = "authority"
-
-        /** set to `true` for user-initiated sync that skips network checks */
-        const val INPUT_MANUAL = "manual"
-
-        /** set to `true` for syncs that are caused by local changes */
-        const val INPUT_UPLOAD = "upload"
-
-        /** Whether re-synchronization is requested. One of [NO_RESYNC] (default), [RESYNC] or [FULL_RESYNC]. */
-        const val INPUT_RESYNC = "resync"
-        @IntDef(NO_RESYNC, RESYNC, FULL_RESYNC)
-        annotation class InputResync
-        const val NO_RESYNC = 0
-        /** Re-synchronization is requested. See [Syncer.SYNC_EXTRAS_RESYNC] for details. */
-        const val RESYNC = 1
-        /** Full re-synchronization is requested. See [Syncer.SYNC_EXTRAS_FULL_RESYNC] for details. */
-        const val FULL_RESYNC = 2
-
-        /**
-         * How often this work will be retried to run after soft (network) errors.
-         *
-         * Retry strategy is defined in work request ([enqueue]).
-         */
-        internal const val MAX_RUN_ATTEMPTS = 5
-
-        /**
-         * Set of currently running syncs, identified by their [commonTag].
-         */
-        private val runningSyncs = Collections.synchronizedSet(HashSet<String>())
-
-        /**
-         * Stops running sync workers and removes pending sync workers from queue, for all authorities.
-         */
-        fun cancelAllWork(context: Context, account: Account) {
-            val workManager = WorkManager.getInstance(context)
-            for (authority in SyncUtils.syncAuthorities(context)) {
-                workManager.cancelUniqueWork(OneTimeSyncWorker.workerName(account, authority))
-                workManager.cancelUniqueWork(PeriodicSyncWorker.workerName(account, authority))
-            }
-        }
-
-        /**
-         * This tag shall be added to every worker that is enqueued by a subclass.
-         */
-        fun commonTag(account: Account, authority: String): String =
-            "sync-$authority ${account.type}/${account.name}"
-
-        /**
-         * Observes whether >0 sync workers (both [PeriodicSyncWorker] and [OneTimeSyncWorker])
-         * exist, belonging to given account and authorities, and which are/is in the given worker state.
-         *
-         * @param workStates   list of states of workers to match
-         * @param account      the account which the workers belong to
-         * @param authorities  type of sync work, ie [CalendarContract.AUTHORITY]
-         * @param whichTag     function to generate tag that should be observed for given account and authority
-         *
-         * @return flow that emits `true` if at least one worker with matching query was found; `false` otherwise
-         */
-        fun exists(
-            context: Context,
-            workStates: List<WorkInfo.State>,
-            account: Account? = null,
-            authorities: List<String>? = null,
-            whichTag: (account: Account, authority: String) -> String = { account, authority ->
-                commonTag(account, authority)
-            }
-        ): Flow<Boolean> {
-            val workQuery = WorkQuery.Builder.fromStates(workStates)
-            if (account != null && authorities != null)
-                workQuery.addTags(
-                    authorities.map { authority -> whichTag(account, authority) }
-                )
-            return WorkManager.getInstance(context)
-                .getWorkInfosFlow(workQuery.build())
-                .map { workInfoList ->
-                    workInfoList.isNotEmpty()
-                }
-        }
-
-    }
-
-    @Inject
-    lateinit var accountSettingsFactory: AccountSettings.Factory
-
-    @Inject
-    lateinit var addressBookSyncer: AddressBookSyncer.Factory
-
-    @Inject
-    lateinit var calendarSyncer: CalendarSyncer.Factory
-
-    @Inject
-    lateinit var jtxSyncer: JtxSyncer.Factory
-
-    @Inject
-    lateinit var logger: Logger
-
-    @Inject
-    lateinit var notificationRegistry: NotificationRegistry
-
-    @Inject
-    lateinit var pushNotificationManager: PushNotificationManager
-
-    @Inject
-    lateinit var syncConditionsFactory: SyncConditions.Factory
-
-    @Inject
-    lateinit var taskSyncer: TaskSyncer.Factory
-
-
-    override suspend fun doWork(): Result {
-        // ensure we got the required arguments
-        val account = Account(
-            inputData.getString(INPUT_ACCOUNT_NAME) ?: throw IllegalArgumentException("$INPUT_ACCOUNT_NAME required"),
-            inputData.getString(INPUT_ACCOUNT_TYPE) ?: throw IllegalArgumentException("$INPUT_ACCOUNT_TYPE required")
-        )
-        val authority = inputData.getString(INPUT_AUTHORITY) ?: throw IllegalArgumentException("$INPUT_AUTHORITY required")
-
-        val syncTag = commonTag(account, authority)
-        logger.info("${javaClass.simpleName} called for $syncTag")
-
-        if (!runningSyncs.add(syncTag)) {
-            logger.info("There's already another worker running for $syncTag, skipping")
-            return Result.success()
-        }
-
-        // Dismiss any pending push notification
-        pushNotificationManager.dismiss(account, authority)
-
-        try {
-            val accountSettings = try {
-                accountSettingsFactory.create(account)
-            } catch (e: InvalidAccountException) {
-                val workId = workerParams.id
-                logger.warning("Account $account doesn't exist anymore, cancelling worker $workId")
-
-                val workManager = WorkManager.getInstance(applicationContext)
-                workManager.cancelWorkById(workId)
-
-                return Result.failure()
-            }
-
-            if (inputData.getBoolean(INPUT_MANUAL, false))
-                logger.info("Manual sync, skipping network checks")
-            else {
-                val syncConditions = syncConditionsFactory.create(accountSettings)
-
-                // check internet connection
-                if (!syncConditions.internetAvailable()) {
-                    logger.info("WorkManager started SyncWorker without Internet connection. Aborting.")
-                    return Result.success()
-                }
-
-                // check WiFi restriction
-                if (!syncConditions.wifiConditionsMet()) {
-                    logger.info("WiFi conditions not met. Won't run periodic sync.")
-                    return Result.success()
-                }
-            }
-
-            return doSyncWork(account, authority, accountSettings)
-        } finally {
-            logger.info("${javaClass.simpleName} finished for $syncTag")
-            runningSyncs -= syncTag
-
-            if (Build.VERSION.SDK_INT >= 31 && stopReason != WorkInfo.STOP_REASON_NOT_STOPPED)
-                logger.warning("Worker was stopped with reason: $stopReason")
-        }
-    }
-
-    open suspend fun doSyncWork(
-        account: Account,
-        authority: String,
-        accountSettings: AccountSettings
-    ): Result = withContext(syncDispatcher) {
-        logger.info("Running ${javaClass.name}: account=$account, authority=$authority")
-
-        // pass possibly supplied flags to the selected syncer
-        val extrasList = mutableListOf<String>()
-        when (inputData.getInt(INPUT_RESYNC, NO_RESYNC)) {
-            RESYNC ->      extrasList.add(Syncer.SYNC_EXTRAS_RESYNC)
-            FULL_RESYNC -> extrasList.add(Syncer.SYNC_EXTRAS_FULL_RESYNC)
-        }
-        if (inputData.getBoolean(INPUT_UPLOAD, false))
-            // Comes in through SyncAdapterService and is used only by ContactsSyncManager for an Android 7 workaround.
-            extrasList.add(ContentResolver.SYNC_EXTRAS_UPLOAD)
-        val extras = extrasList.toTypedArray()
-
-        // We still use the sync adapter framework's SyncResult to pass the sync results, but this
-        // is only for legacy reasons and can be replaced by our own result class in the future.
-        val result = SyncResult()
-
-        // What are we going to sync? Select syncer based on authority
-        val syncer = when (authority) {
-            applicationContext.getString(R.string.address_books_authority) ->
-                addressBookSyncer.create(account, extras, result)
-            CalendarContract.AUTHORITY ->
-                calendarSyncer.create(account, extras, result)
-            TaskProvider.ProviderName.JtxBoard.authority ->
-                jtxSyncer.create(account, extras, result)
-            TaskProvider.ProviderName.OpenTasks.authority,
-            TaskProvider.ProviderName.TasksOrg.authority ->
-                taskSyncer.create(account, authority, extras, result)
-            else ->
-                throw IllegalArgumentException("Invalid authority $authority")
-        }
-
-        // Start syncing
-        runInterruptible {
-            syncer()
-        }
-
-        // Check for errors
-        if (result.hasError()) {
-            val syncResult = Data.Builder()
-                .putString("syncresult", result.toString())
-                .putString("syncResultStats", result.stats.toString())
-                .build()
-
-            val softErrorNotificationTag = account.type + "-" + account.name + "-" + authority
-
-            // On soft errors the sync is retried a few times before considered failed
-            if (result.hasSoftError()) {
-                logger.warning("Soft error while syncing: result=$result, stats=${result.stats}")
-                if (runAttemptCount < MAX_RUN_ATTEMPTS) {
-                    val blockDuration = result.delayUntil - System.currentTimeMillis() / 1000
-                    logger.warning("Waiting for $blockDuration seconds, before retrying ...")
-
-                    // We block the SyncWorker here so that it won't be started by the sync framework immediately again.
-                    // This should be replaced by proper work scheduling as soon as we don't depend on the sync framework anymore.
-                    if (blockDuration > 0)
-                        delay(blockDuration * 1000)
-
-                    logger.warning("Retrying on soft error (attempt $runAttemptCount of $MAX_RUN_ATTEMPTS)")
-                    return@withContext Result.retry()
-                }
-
-                logger.warning("Max retries on soft errors reached ($runAttemptCount of $MAX_RUN_ATTEMPTS). Treating as failed")
-
-                notificationRegistry.notifyIfPossible(NotificationRegistry.NOTIFY_SYNC_ERROR, tag = softErrorNotificationTag) {
-                    NotificationCompat.Builder(applicationContext, notificationRegistry.CHANNEL_SYNC_IO_ERRORS)
-                        .setSmallIcon(R.drawable.ic_sync_problem_notify)
-                        .setContentTitle(account.name)
-                        .setContentText(applicationContext.getString(R.string.sync_error_retry_limit_reached))
-                        .setSubText(account.name)
-                        .setOnlyAlertOnce(true)
-                        .setPriority(NotificationCompat.PRIORITY_MIN)
-                        .setCategory(NotificationCompat.CATEGORY_ERROR)
-                        .build()
-                }
-
-                return@withContext Result.failure(syncResult)
-            }
-
-            // If no soft error found, dismiss sync error notification
-            val notificationManager = NotificationManagerCompat.from(applicationContext)
-            notificationManager.cancel(
-                softErrorNotificationTag,
-                NotificationRegistry.NOTIFY_SYNC_ERROR
-            )
-
-            // On a hard error - fail with an error message
-            // Note: SyncManager should have notified the user
-            if (result.hasHardError()) {
-                logger.warning("Hard error while syncing: result=$result, stats=${result.stats}")
-                return@withContext Result.failure(syncResult)
-            }
-        }
-
-        return@withContext Result.success()
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/ui/AboutActivity.kt

@@ -1,358 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.ui
-
-import android.content.Context
-import android.os.Bundle
-import androidx.activity.compose.setContent
-import androidx.activity.viewModels
-import androidx.appcompat.app.AppCompatActivity
-import androidx.compose.foundation.ExperimentalFoundationApi
-import androidx.compose.foundation.Image
-import androidx.compose.foundation.layout.Column
-import androidx.compose.foundation.layout.PaddingValues
-import androidx.compose.foundation.layout.fillMaxSize
-import androidx.compose.foundation.layout.fillMaxWidth
-import androidx.compose.foundation.layout.padding
-import androidx.compose.foundation.layout.size
-import androidx.compose.foundation.lazy.LazyColumn
-import androidx.compose.foundation.lazy.items
-import androidx.compose.foundation.pager.HorizontalPager
-import androidx.compose.foundation.pager.rememberPagerState
-import androidx.compose.foundation.rememberScrollState
-import androidx.compose.foundation.verticalScroll
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.automirrored.filled.ArrowBack
-import androidx.compose.material.icons.filled.Home
-import androidx.compose.material3.ExperimentalMaterial3Api
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.material3.Scaffold
-import androidx.compose.material3.Tab
-import androidx.compose.material3.TabRow
-import androidx.compose.material3.Text
-import androidx.compose.material3.TopAppBar
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.livedata.observeAsState
-import androidx.compose.runtime.rememberCoroutineScope
-import androidx.compose.ui.Alignment
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.graphics.Color
-import androidx.compose.ui.platform.LocalUriHandler
-import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.style.TextAlign
-import androidx.compose.ui.tooling.preview.Preview
-import androidx.compose.ui.unit.dp
-import androidx.lifecycle.MutableLiveData
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
-import at.bitfire.davdroid.BuildConfig
-import at.bitfire.davdroid.Constants
-import at.bitfire.davdroid.Constants.withStatParams
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.ui.composable.PixelBoxes
-import com.mikepenz.aboutlibraries.Libs
-import com.mikepenz.aboutlibraries.ui.compose.m3.LibrariesContainer
-import com.mikepenz.aboutlibraries.util.withJson
-import dagger.BindsOptionalOf
-import dagger.Module
-import dagger.hilt.InstallIn
-import dagger.hilt.android.AndroidEntryPoint
-import dagger.hilt.android.components.ActivityComponent
-import dagger.hilt.android.lifecycle.HiltViewModel
-import dagger.hilt.android.qualifiers.ApplicationContext
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
-import org.json.JSONObject
-import java.text.Collator
-import java.time.LocalDateTime
-import java.time.ZoneOffset
-import java.time.format.DateTimeFormatter
-import java.time.format.FormatStyle
-import java.util.LinkedList
-import java.util.Locale
-import java.util.Optional
-import java.util.logging.Level
-import java.util.logging.Logger
-import javax.inject.Inject
-import kotlin.jvm.optionals.getOrNull
-
-@AndroidEntryPoint
-class AboutActivity: AppCompatActivity() {
-
-    val model by viewModels<Model>()
-
-    @Inject
-    lateinit var licenseInfoProvider: Optional<AppLicenseInfoProvider>
-
-
-    @OptIn(ExperimentalMaterial3Api::class, ExperimentalFoundationApi::class)
-    override fun onCreate(savedInstanceState: Bundle?) {
-        super.onCreate(savedInstanceState)
-
-        setContent {
-            AppTheme {
-                val uriHandler = LocalUriHandler.current
-
-                Scaffold(
-                    topBar = {
-                        TopAppBar(
-                            navigationIcon = {
-                                IconButton(onClick = { onSupportNavigateUp() }) {
-                                    Icon(
-                                        Icons.AutoMirrored.Default.ArrowBack,
-                                        contentDescription = stringResource(R.string.navigate_up)
-                                    )
-                                }
-                            },
-                            title = {
-                                Text(stringResource(R.string.navigation_drawer_about))
-                            },
-                            actions = {
-                                IconButton(onClick = {
-                                    uriHandler.openUri(Constants.HOMEPAGE_URL
-                                        .buildUpon()
-                                        .withStatParams("AboutActivity")
-                                        .build().toString())
-                                }) {
-                                    Icon(
-                                        Icons.Default.Home,
-                                        contentDescription = stringResource(R.string.navigation_drawer_website)
-                                    )
-                                }
-                            }
-                        )
-                    }
-                ) { paddingValues ->
-                    Column(Modifier.padding(paddingValues)) {
-                        val scope = rememberCoroutineScope()
-                        val state = rememberPagerState(pageCount = { 3 })
-
-                        TabRow(state.currentPage) {
-                            Tab(state.currentPage == 0, onClick = {
-                                scope.launch { state.scrollToPage(0) }
-                            }) {
-                                Text(
-                                    stringResource(R.string.app_name),
-                                    modifier = Modifier.padding(8.dp)
-                                )
-                            }
-                            Tab(state.currentPage == 1, onClick = {
-                                scope.launch { state.scrollToPage(1) }
-                            }) {
-                                Text(
-                                    stringResource(R.string.about_translations),
-                                    modifier = Modifier.padding(8.dp)
-                                )
-                            }
-                            Tab(state.currentPage == 2, onClick = {
-                                scope.launch { state.scrollToPage(2) }
-                            }) {
-                                Text(
-                                    stringResource(R.string.about_libraries),
-                                    modifier = Modifier.padding(8.dp)
-                                )
-                            }
-                        }
-
-                        HorizontalPager(
-                            state,
-                            modifier = Modifier
-                                .fillMaxWidth()
-                                .weight(1f),
-                            verticalAlignment = Alignment.Top
-                        ) { index ->
-                            when (index) {
-                                0 -> AboutApp(licenseInfoProvider = licenseInfoProvider.getOrNull())
-                                1 -> {
-                                    val translations = model.translations.observeAsState(emptyList())
-                                    TranslatorsGallery(translations.value)
-                                }
-
-                                2 -> LibrariesContainer(Modifier.fillMaxSize(),
-                                    itemContentPadding = PaddingValues(horizontal = 8.dp, vertical = 8.dp),
-                                    itemSpacing = 8.dp,
-                                    librariesBlock = { ctx ->
-                                        Libs.Builder()
-                                            .withJson(ctx, R.raw.aboutlibraries)
-                                            .build()
-                                    })
-                            }
-                        }
-                    }
-                }
-            }
-        }
-    }
-
-
-    @HiltViewModel
-    class Model @Inject constructor(
-        @ApplicationContext val context: Context,
-        private val logger: Logger
-    ): ViewModel() {
-
-        data class Translation(
-            val language: String,
-            val translators: Set<String>
-        )
-
-        val translations = MutableLiveData<List<Translation>>()
-
-        init {
-            viewModelScope.launch(Dispatchers.IO) {
-                loadTranslations()
-            }
-        }
-
-        private fun loadTranslations() {
-            try {
-                context.resources.assets.open("translators.json").use { stream ->
-                    val jsonTranslations = JSONObject(stream.readBytes().decodeToString())
-                    val result = LinkedList<Translation>()
-                    for (langCode in jsonTranslations.keys()) {
-                        val jsonTranslators = jsonTranslations.getJSONArray(langCode)
-                        val translators = Array<String>(jsonTranslators.length()) { idx ->
-                            jsonTranslators.getString(idx)
-                        }
-
-                        val langTag = langCode.replace('_', '-')
-                        val language = Locale.forLanguageTag(langTag).displayName
-                        result += Translation(language, translators.toSet())
-                    }
-
-                    // sort translations by localized language name
-                    val collator = Collator.getInstance()
-                    result.sortWith { o1, o2 ->
-                        collator.compare(o1.language, o2.language)
-                    }
-
-                    translations.postValue(result)
-                }
-            } catch (e: Exception) {
-                logger.log(Level.WARNING, "Couldn't load translators", e)
-            }
-        }
-
-    }
-
-
-    interface AppLicenseInfoProvider {
-        @Composable
-        fun LicenseInfo()
-    }
-
-    @Module
-    @InstallIn(ActivityComponent::class)
-    interface AppLicenseInfoProviderModule {
-        @BindsOptionalOf
-        fun appLicenseInfoProvider(): AppLicenseInfoProvider
-    }
-
-}
-
-
-@Composable
-fun AboutApp(licenseInfoProvider: AboutActivity.AppLicenseInfoProvider? = null) {
-    Column(
-        modifier = Modifier
-            .padding(8.dp)
-            .fillMaxWidth()
-            .verticalScroll(rememberScrollState())) {
-        Image(
-            UiUtils.adaptiveIconPainterResource(R.mipmap.ic_launcher),
-            contentDescription = stringResource(R.string.app_name),
-            modifier = Modifier
-                .size(128.dp)
-                .align(Alignment.CenterHorizontally)
-        )
-        Text(
-            stringResource(R.string.app_name),
-            style = MaterialTheme.typography.headlineMedium,
-            textAlign = TextAlign.Center,
-            modifier = Modifier
-                .fillMaxWidth()
-                .padding(8.dp)
-        )
-
-        Text(
-            stringResource(R.string.about_version, BuildConfig.VERSION_NAME, BuildConfig.VERSION_CODE),
-            style = MaterialTheme.typography.bodyLarge,
-            textAlign = TextAlign.Center,
-            modifier = Modifier.fillMaxWidth()
-        )
-
-        Text(
-            stringResource(R.string.about_copyright),
-            style = MaterialTheme.typography.bodyLarge,
-            textAlign = TextAlign.Center,
-            modifier = Modifier
-                .fillMaxWidth()
-                .padding(vertical = 8.dp)
-        )
-
-        Text(
-            stringResource(R.string.about_license_info_no_warranty),
-            style = MaterialTheme.typography.bodyLarge,
-            modifier = Modifier
-                .fillMaxWidth()
-                .padding(top = 8.dp)
-        )
-
-        PixelBoxes(
-            arrayOf(Color(0xFFFCF434), Color.White, Color(0xFF9C59D1), Color.Black),
-            modifier = Modifier
-                .align(Alignment.CenterHorizontally)
-                .padding(16.dp)
-        )
-
-        licenseInfoProvider?.LicenseInfo()
-    }
-}
-
-@Composable
-@Preview
-fun AboutApp_Preview() {
-    AboutApp(licenseInfoProvider = object : AboutActivity.AppLicenseInfoProvider {
-        @Composable
-        override fun LicenseInfo() {
-            Text("Some flavored License Info")
-        }
-    })
-}
-
-
-@Composable
-fun TranslatorsGallery(
-    translations: List<AboutActivity.Model.Translation>
-) {
-    val collator = Collator.getInstance()
-    LazyColumn(Modifier.padding(8.dp)) {
-        items(translations) { translation ->
-            Text(
-                translation.language,
-                style = MaterialTheme.typography.headlineMedium,
-                modifier = Modifier.padding(vertical = 4.dp)
-            )
-            Text(
-                translation.translators
-                    .sortedWith { a, b -> collator.compare(a, b) }
-                    .joinToString(" · "),
-                style = MaterialTheme.typography.bodyLarge,
-                modifier = Modifier.padding(bottom = 16.dp)
-            )
-        }
-    }
-}
-
-@Composable
-@Preview
-fun TranslatorsGallery_Sample() {
-    TranslatorsGallery(listOf(
-        AboutActivity.Model.Translation("Some Language", setOf("User 1", "User 2")),
-        AboutActivity.Model.Translation("Another Language", setOf("User 3", "User 4"))
-    ))
-}

app/src/main/kotlin/at/bitfire/davdroid/ui/AppSettingsModel.kt

@@ -1,110 +0,0 @@
-package at.bitfire.davdroid.ui
-
-import android.content.Context
-import android.content.IntentFilter
-import android.content.pm.PackageManager
-import android.os.PowerManager
-import androidx.core.content.getSystemService
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
-import at.bitfire.cert4android.CustomCertStore
-import at.bitfire.davdroid.BuildConfig
-import at.bitfire.davdroid.repository.PreferenceRepository
-import at.bitfire.davdroid.settings.Settings
-import at.bitfire.davdroid.settings.SettingsManager
-import at.bitfire.davdroid.sync.TasksAppManager
-import at.bitfire.davdroid.ui.intro.BatteryOptimizationsPageModel
-import at.bitfire.davdroid.ui.intro.OpenSourcePage
-import at.bitfire.davdroid.util.PermissionUtils
-import at.bitfire.davdroid.util.broadcastReceiverFlow
-import dagger.hilt.android.lifecycle.HiltViewModel
-import dagger.hilt.android.qualifiers.ApplicationContext
-import kotlinx.coroutines.flow.SharingStarted
-import kotlinx.coroutines.flow.map
-import kotlinx.coroutines.flow.stateIn
-import javax.inject.Inject
-
-@HiltViewModel
-class AppSettingsModel @Inject constructor(
-    @ApplicationContext val context: Context,
-    private val preference: PreferenceRepository,
-    private val settings: SettingsManager,
-    private val tasksAppManager: TasksAppManager
-) : ViewModel() {
-
-    // debugging
-
-    private val powerManager = context.getSystemService<PowerManager>()!!
-    val batterySavingExempted = broadcastReceiverFlow(context, IntentFilter(PermissionUtils.ACTION_POWER_SAVE_WHITELIST_CHANGED), immediate = true)
-        .map { powerManager.isIgnoringBatteryOptimizations(BuildConfig.APPLICATION_ID) }
-        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), false)
-
-    fun verboseLogging() = preference.logToFileFlow()
-    fun updateVerboseLogging(verbose: Boolean) {
-        preference.logToFile(verbose)
-    }
-
-
-    // connection
-
-    fun proxyType() = settings.getIntFlow(Settings.PROXY_TYPE)
-    fun updateProxyType(type: Int) {
-        settings.putInt(Settings.PROXY_TYPE, type)
-    }
-
-    fun proxyHostName() = settings.getStringFlow(Settings.PROXY_HOST)
-    fun updateProxyHostName(host: String) {
-        settings.putString(Settings.PROXY_HOST, host)
-    }
-
-    fun proxyPort() = settings.getIntFlow(Settings.PROXY_PORT)
-    fun updateProxyPort(port: Int) {
-        settings.putInt(Settings.PROXY_PORT, port)
-    }
-
-
-    // security
-
-    fun distrustSystemCertificates() = settings.getBooleanFlow(Settings.DISTRUST_SYSTEM_CERTIFICATES)
-    fun updateDistrustSystemCertificates(distrust: Boolean) {
-        settings.putBoolean(Settings.DISTRUST_SYSTEM_CERTIFICATES, distrust)
-    }
-
-    fun resetCertificates() {
-        CustomCertStore.getInstance(context).clearUserDecisions()
-    }
-
-
-    // user interface
-
-    fun theme() = settings.getIntFlow(Settings.PREFERRED_THEME)
-    fun updateTheme(theme: Int) {
-        settings.putInt(Settings.PREFERRED_THEME, theme)
-        UiUtils.updateTheme(context)
-    }
-
-    fun resetHints() {
-        settings.remove(BatteryOptimizationsPageModel.HINT_BATTERY_OPTIMIZATIONS)
-        settings.remove(BatteryOptimizationsPageModel.HINT_AUTOSTART_PERMISSION)
-        settings.remove(TasksModel.HINT_OPENTASKS_NOT_INSTALLED)
-        settings.remove(OpenSourcePage.Model.SETTING_NEXT_DONATION_POPUP)
-    }
-
-
-    // tasks
-
-    val pm: PackageManager = context.packageManager
-    private val appInfoFlow = tasksAppManager.currentProviderFlow(viewModelScope).map { tasksProvider ->
-        tasksProvider?.packageName?.let { pkgName ->
-            pm.getApplicationInfo(pkgName, 0)
-        }
-    }
-    val appName = appInfoFlow.map { it?.loadLabel(pm)?.toString() }
-    val icon = appInfoFlow.map { it?.loadIcon(pm) }
-
-
-    // push
-
-    val pushEndpoint = preference.unifiedPushEndpointFlow()
-
-}

app/src/main/kotlin/at/bitfire/davdroid/ui/AppTheme.kt

@@ -1,46 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.ui
-
-import android.app.Activity
-import androidx.compose.foundation.isSystemInDarkTheme
-import androidx.compose.material3.MaterialTheme
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.CompositionLocalProvider
-import androidx.compose.runtime.SideEffect
-import androidx.compose.ui.graphics.toArgb
-import androidx.compose.ui.platform.LocalContext
-import androidx.compose.ui.platform.LocalUriHandler
-import androidx.compose.ui.platform.LocalView
-import androidx.core.view.WindowCompat
-import at.bitfire.davdroid.ui.composable.SafeAndroidUriHandler
-
-@Composable
-fun AppTheme(
-    darkTheme: Boolean = isSystemInDarkTheme(),
-    content: @Composable () -> Unit
-) {
-    val colorScheme = if (!darkTheme)
-        M3ColorScheme.lightScheme
-    else
-        M3ColorScheme.darkScheme
-
-    val view = LocalView.current
-    if (!view.isInEditMode) {
-        SideEffect {
-            val window = (view.context as Activity).window
-            window.statusBarColor = colorScheme.primary.toArgb()
-            WindowCompat.getInsetsController(window, view).isAppearanceLightStatusBars = darkTheme
-        }
-    }
-
-    val uriHandler = SafeAndroidUriHandler(LocalContext.current)
-    CompositionLocalProvider(LocalUriHandler provides uriHandler) {
-        MaterialTheme(
-            colorScheme = colorScheme,
-            content = content
-        )
-    }
-}

app/src/main/kotlin/at/bitfire/davdroid/ui/DebugInfoModel.kt

@@ -1,621 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.ui
-
-import android.accounts.Account
-import android.accounts.AccountManager
-import android.app.usage.UsageStatsManager
-import android.content.ContentResolver
-import android.content.ContentUris
-import android.content.Context
-import android.content.Intent
-import android.content.pm.ApplicationInfo
-import android.content.pm.PackageManager
-import android.net.ConnectivityManager
-import android.net.Uri
-import android.os.Build
-import android.os.Environment
-import android.os.LocaleList
-import android.os.PowerManager
-import android.os.StatFs
-import android.provider.CalendarContract
-import android.provider.ContactsContract
-import android.text.format.DateUtils
-import android.text.format.Formatter
-import androidx.annotation.WorkerThread
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.setValue
-import androidx.core.app.NotificationManagerCompat
-import androidx.core.content.ContextCompat
-import androidx.core.content.getSystemService
-import androidx.core.content.pm.PackageInfoCompat
-import androidx.lifecycle.ViewModel
-import androidx.lifecycle.viewModelScope
-import androidx.work.WorkManager
-import androidx.work.WorkQuery
-import at.bitfire.dav4jvm.exception.DavException
-import at.bitfire.davdroid.BuildConfig
-import at.bitfire.davdroid.InvalidAccountException
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.TextTable
-import at.bitfire.davdroid.db.AppDatabase
-import at.bitfire.davdroid.log.LogFileHandler
-import at.bitfire.davdroid.repository.AccountRepository
-import at.bitfire.davdroid.resource.LocalAddressBook
-import at.bitfire.davdroid.settings.AccountSettings
-import at.bitfire.davdroid.settings.SettingsManager
-import at.bitfire.davdroid.sync.worker.BaseSyncWorker
-import at.bitfire.ical4android.TaskProvider
-import at.techbee.jtx.JtxContract
-import com.google.common.io.ByteStreams
-import com.google.common.io.Files
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedFactory
-import dagger.assisted.AssistedInject
-import dagger.hilt.android.lifecycle.HiltViewModel
-import dagger.hilt.android.qualifiers.ApplicationContext
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.launch
-import org.dmfs.tasks.contract.TaskContract
-import java.io.File
-import java.io.IOException
-import java.io.Writer
-import java.util.TimeZone
-import java.util.logging.Level
-import java.util.logging.Logger
-import java.util.zip.ZipEntry
-import java.util.zip.ZipOutputStream
-import at.bitfire.ical4android.util.MiscUtils.asSyncAdapter as asCalendarSyncAdapter
-import at.bitfire.vcard4android.Utils.asSyncAdapter as asContactsSyncAdapter
-import at.techbee.jtx.JtxContract.asSyncAdapter as asJtxSyncAdapter
-
-@HiltViewModel(assistedFactory = DebugInfoModel.Factory::class)
-class DebugInfoModel @AssistedInject constructor(
-    @Assisted private val details: DebugInfoDetails,
-    private val accountRepository: AccountRepository,
-    private val accountSettingsFactory: AccountSettings.Factory,
-    @ApplicationContext val context: Context,
-    private val db: AppDatabase,
-    private val logger: Logger,
-    private val settings: SettingsManager
-) : ViewModel() {
-
-    data class DebugInfoDetails(
-        val account: Account?,
-        val authority: String?,
-        val cause: Throwable?,
-        val localResource: String?,
-        val remoteResource: String?,
-        val logs: String?
-    )
-
-    @AssistedFactory
-    interface Factory {
-        fun createWithDetails(details: DebugInfoDetails): DebugInfoModel
-    }
-
-    companion object {
-        private const val FILE_DEBUG_INFO = "debug-info.txt"
-        private const val FILE_LOGS = "logs.txt"
-    }
-
-    data class UiState(
-        val cause: Throwable? = null,
-        val localResource: String? = null,
-        val remoteResource: String? = null,
-        val logFile: File? = null,
-        val debugInfo: File? = null,
-        val zipFile: File? = null,
-        val zipInProgress: Boolean = false,
-        val error: String? = null
-    )
-
-    var uiState by mutableStateOf(UiState())
-        private set
-
-    fun resetError() {
-        uiState = uiState.copy(error = null)
-    }
-
-    fun resetZipFile() {
-        uiState = uiState.copy(zipFile = null)
-    }
-
-    init {
-        // create debug info directory
-        val debugDir = LogFileHandler.debugDir(context) ?: throw IOException("Couldn't create debug info directory")
-
-        viewModelScope.launch(Dispatchers.Default) {
-            // create log file from EXTRA_LOGS or log file
-            if (details.logs != null) {
-                val file = File(debugDir, FILE_LOGS)
-                if (!file.exists() || file.canWrite()) {
-                    file.printWriter().use { writer ->
-                        writer.write(details.logs)
-                    }
-                    uiState = uiState.copy(logFile = file)
-                } else
-                    logger.warning("Can't write logs to $file")
-            } else LogFileHandler.getDebugLogFile(context)?.let { debugLogFile ->
-                if (debugLogFile.isFile && debugLogFile.canRead())
-                    uiState = uiState.copy(logFile = debugLogFile)
-            }
-
-            uiState = uiState.copy(
-                cause = details.cause,
-                localResource = details.localResource,
-                remoteResource = details.remoteResource
-            )
-            generateDebugInfo(
-                syncAccount = details.account,
-                syncAuthority = details.authority,
-                cause = details.cause,
-                localResource = details.localResource,
-                remoteResource = details.remoteResource
-            )
-        }
-    }
-
-    /**
-     * Creates debug info and saves it to [FILE_DEBUG_INFO] in [LogFileHandler.debugDir]
-     *
-     * Note: Part of this method and all of it's helpers (listed below) should probably be extracted in the future
-     */
-    @WorkerThread
-    private fun generateDebugInfo(syncAccount: Account?, syncAuthority: String?, cause: Throwable?, localResource: String?, remoteResource: String?) {
-        val debugInfoFile = File(LogFileHandler.debugDir(context), FILE_DEBUG_INFO)
-        debugInfoFile.printWriter().use { writer ->
-            writer.println("--- BEGIN DEBUG INFO ---")
-            writer.println()
-
-            // begin with most specific information
-            if (syncAccount != null || syncAuthority != null) {
-                writer.append("SYNCHRONIZATION INFO\n")
-                if (syncAccount != null)
-                    writer.append("Account: $syncAccount\n")
-                if (syncAuthority != null)
-                    writer.append("Authority: $syncAuthority\n")
-                writer.append("\n")
-            }
-
-            if (cause != null) {
-                writer.println("EXCEPTION")
-                cause.printStackTrace(writer)
-                writer.println()
-            }
-
-            // exception details
-            if (cause is DavException) {
-                cause.request?.let { request ->
-                    writer.append("HTTP REQUEST\n$request\n")
-                    cause.requestBody?.let { writer.append(it) }
-                    writer.append("\n\n")
-                }
-                cause.response?.let { response ->
-                    writer.append("HTTP RESPONSE\n$response\n")
-                    cause.responseBody?.let { writer.append(it) }
-                    writer.append("\n\n")
-                }
-            }
-
-            if (localResource != null)
-                writer.append("LOCAL RESOURCE\n$localResource\n\n")
-
-            if (remoteResource != null)
-                writer.append("REMOTE RESOURCE\n$remoteResource\n\n")
-
-            // software info
-            try {
-                writer.append("SOFTWARE INFORMATION\n")
-                val table = TextTable("Package", "Version", "Code", "Installer", "Notes")
-                val pm = context.packageManager
-
-                val packageNames = mutableSetOf(      // we always want info about these packages:
-                    BuildConfig.APPLICATION_ID,            // DAVx5
-                    TaskProvider.ProviderName.JtxBoard.packageName,     // jtx Board
-                    TaskProvider.ProviderName.OpenTasks.packageName,    // OpenTasks
-                    TaskProvider.ProviderName.TasksOrg.packageName      // tasks.org
-                )
-                // ... and info about contact and calendar provider
-                for (authority in arrayOf(ContactsContract.AUTHORITY, CalendarContract.AUTHORITY))
-                    pm.resolveContentProvider(authority, 0)?.let { packageNames += it.packageName }
-                // ... and info about contact, calendar, task-editing apps
-                val dataUris = arrayOf(
-                    ContactsContract.Contacts.CONTENT_URI,
-                    CalendarContract.Events.CONTENT_URI,
-                    TaskContract.Tasks.getContentUri(TaskProvider.ProviderName.OpenTasks.authority),
-                    TaskContract.Tasks.getContentUri(TaskProvider.ProviderName.TasksOrg.authority)
-                )
-                for (uri in dataUris) {
-                    val viewIntent = Intent(Intent.ACTION_VIEW, ContentUris.withAppendedId(uri, /* some random ID */ 1))
-                    for (info in pm.queryIntentActivities(viewIntent, 0))
-                        packageNames += info.activityInfo.packageName
-                }
-
-                for (packageName in packageNames)
-                    try {
-                        val info = pm.getPackageInfo(packageName, 0)
-                        val appInfo = info.applicationInfo
-                        val notes = mutableListOf<String>()
-                        if (appInfo?.enabled == false)
-                            notes += "disabled"
-                        if (appInfo?.flags?.and(ApplicationInfo.FLAG_EXTERNAL_STORAGE) != 0)
-                            notes += "<em>on external storage</em>"
-                        table.addLine(
-                            info.packageName, info.versionName, PackageInfoCompat.getLongVersionCode(info),
-                            pm.getInstallerPackageName(info.packageName) ?: '—', notes.joinToString(", ")
-                        )
-                    } catch (ignored: PackageManager.NameNotFoundException) {
-                    }
-                writer.append(table.toString())
-            } catch (e: Exception) {
-                logger.log(Level.SEVERE, "Couldn't get software information", e)
-            }
-
-            // system info
-            val locales: Any = LocaleList.getAdjustedDefault()
-            writer.append(
-                "\n\nSYSTEM INFORMATION\n\n" +
-                        "Android version: ${Build.VERSION.RELEASE} (${Build.DISPLAY})\n" +
-                        "Device: ${Build.MANUFACTURER} ${Build.MODEL} (${Build.DEVICE})\n\n" +
-                        "Locale(s): $locales\n" +
-                        "Time zone: ${TimeZone.getDefault().id}\n"
-            )
-            val filesPath = Environment.getDataDirectory()
-            val statFs = StatFs(filesPath.path)
-            writer.append("Internal memory ($filesPath): ")
-                .append(Formatter.formatFileSize(context, statFs.availableBytes))
-                .append(" free of ")
-                .append(Formatter.formatFileSize(context, statFs.totalBytes))
-                .append("\n\n")
-
-            // power saving
-            if (Build.VERSION.SDK_INT >= 28)
-                context.getSystemService<UsageStatsManager>()?.let { statsManager ->
-                    val bucket = statsManager.appStandbyBucket
-                    writer
-                        .append("App standby bucket: ")
-                        .append(
-                            when {
-                                bucket <= 5 -> "exempted (very good)"
-                                bucket <= UsageStatsManager.STANDBY_BUCKET_ACTIVE -> "active (good)"
-                                bucket <= UsageStatsManager.STANDBY_BUCKET_WORKING_SET -> "working set (bad: job restrictions apply)"
-                                bucket <= UsageStatsManager.STANDBY_BUCKET_FREQUENT -> "frequent (bad: job restrictions apply)"
-                                bucket <= UsageStatsManager.STANDBY_BUCKET_RARE -> "rare (very bad: job and network restrictions apply)"
-                                bucket <= UsageStatsManager.STANDBY_BUCKET_RESTRICTED -> "restricted (very bad: job and network restrictions apply)"
-                                else -> "$bucket"
-                            }
-                        )
-                    writer.append('\n')
-                }
-            context.getSystemService<PowerManager>()?.let { powerManager ->
-                writer.append("App exempted from power saving: ")
-                    .append(if (powerManager.isIgnoringBatteryOptimizations(BuildConfig.APPLICATION_ID)) "yes (good)" else "no (bad)")
-                    .append('\n')
-                    .append("System in power-save mode: ")
-                    .append(if (powerManager.isPowerSaveMode) "yes (restrictions apply!)" else "no")
-                    .append('\n')
-            }
-            // system-wide sync
-            writer.append("System-wide synchronization: ")
-                .append(if (ContentResolver.getMasterSyncAutomatically()) "automatically" else "manually")
-                .append("\n\n")
-
-            // connectivity
-            context.getSystemService<ConnectivityManager>()?.let { connectivityManager ->
-                writer.append("\n\nCONNECTIVITY\n\n")
-                val activeNetwork = connectivityManager.activeNetwork
-                connectivityManager.allNetworks.sortedByDescending { it == activeNetwork }.forEach { network ->
-                    val properties = connectivityManager.getLinkProperties(network)
-                    connectivityManager.getNetworkCapabilities(network)?.let { capabilities ->
-                        writer.append(if (network == activeNetwork) " ☒ " else " ☐ ")
-                            .append(properties?.interfaceName ?: "?")
-                            .append("\n   - ")
-                            .append(capabilities.toString().replace('&', ' '))
-                            .append('\n')
-                    }
-                    if (properties != null) {
-                        writer.append("   - DNS: ")
-                            .append(properties.dnsServers.joinToString(", ") { it.hostAddress })
-                        if (Build.VERSION.SDK_INT >= 28 && properties.isPrivateDnsActive)
-                            writer.append(" (private mode)")
-                        writer.append('\n')
-                    }
-                }
-                writer.append('\n')
-
-                connectivityManager.defaultProxy?.let { proxy ->
-                    writer.append("System default proxy: ${proxy.host}:${proxy.port}\n")
-                }
-                writer.append("Data saver: ").append(
-                    when (connectivityManager.restrictBackgroundStatus) {
-                        ConnectivityManager.RESTRICT_BACKGROUND_STATUS_ENABLED -> "enabled"
-                        ConnectivityManager.RESTRICT_BACKGROUND_STATUS_WHITELISTED -> "whitelisted"
-                        ConnectivityManager.RESTRICT_BACKGROUND_STATUS_DISABLED -> "disabled"
-                        else -> connectivityManager.restrictBackgroundStatus.toString()
-                    }
-                ).append('\n')
-                writer.append('\n')
-            }
-
-            writer.append("\n\nCONFIGURATION\n")
-            // notifications
-            val nm = NotificationManagerCompat.from(context)
-            writer.append("\nNotifications")
-            if (!nm.areNotificationsEnabled())
-                writer.append(" (blocked!)")
-            writer.append(":\n")
-            if (Build.VERSION.SDK_INT >= 26) {
-                val channelsWithoutGroup = nm.notificationChannels.toMutableSet()
-                for (group in nm.notificationChannelGroups) {
-                    writer.append(" - ${group.id}")
-                    if (Build.VERSION.SDK_INT >= 28)
-                        writer.append(" isBlocked=${group.isBlocked}")
-                    writer.append('\n')
-                    for (channel in group.channels) {
-                        writer.append("  * ${channel.id}: importance=${channel.importance}\n")
-                        channelsWithoutGroup -= channel
-                    }
-                }
-                for (channel in channelsWithoutGroup)
-                    writer.append(" - ${channel.id}: importance=${channel.importance}\n")
-            }
-            writer.append('\n')
-            // permissions
-            writer.append("Permissions:\n")
-            val ownPkgInfo = context.packageManager.getPackageInfo(BuildConfig.APPLICATION_ID, PackageManager.GET_PERMISSIONS)
-            for (permission in ownPkgInfo.requestedPermissions.orEmpty()) {
-                val shortPermission = permission.removePrefix("android.permission.")
-                writer.append(" - $shortPermission: ")
-                    .append(
-                        if (ContextCompat.checkSelfPermission(context, permission) == PackageManager.PERMISSION_GRANTED)
-                            "granted"
-                        else
-                            "denied"
-                    )
-                    .append('\n')
-            }
-            writer.append('\n')
-
-            // accounts
-            writer.append("\nACCOUNTS")
-            val accountManager = AccountManager.get(context)
-            for (account in accountRepository.getAll())
-                dumpAccount(account, writer)
-
-            val addressBookAccounts = accountManager.getAccountsByType(context.getString(R.string.account_type_address_book)).toMutableList()
-            if (addressBookAccounts.isNotEmpty()) {
-                writer.append("ADDRESS BOOK ACCOUNTS\n\n")
-                for (account in addressBookAccounts)
-                    dumpAddressBookAccount(account, accountManager, writer)
-            }
-
-            // database dump
-            writer.append("\n\nDATABASE DUMP\n\n")
-            db.dump(writer, arrayOf("webdav_document"))
-
-            // app settings
-            writer.append("\nAPP SETTINGS\n\n")
-            settings.dump(writer)
-
-            writer.append("--- END DEBUG INFO ---\n")
-            writer.toString()
-        }
-        uiState = uiState.copy(debugInfo = debugInfoFile)
-    }
-
-    /**
-     * Creates the ZIP file containing both [FILE_DEBUG_INFO] and [FILE_LOGS].
-     *
-     * Note: Part of this method should probably be extracted to a more suitable location
-     */
-    fun generateZip() {
-        try {
-            uiState = uiState.copy(zipInProgress = true)
-
-            val file = File(LogFileHandler.debugDir(context), "davx5-debug.zip")
-            logger.fine("Writing debug info to ${file.absolutePath}")
-            ZipOutputStream(file.outputStream().buffered()).use { zip ->
-                zip.setLevel(9)
-                uiState.debugInfo?.let { debugInfo ->
-                    zip.putNextEntry(ZipEntry("debug-info.txt"))
-                    Files.copy(debugInfo, zip)
-                    zip.closeEntry()
-                }
-
-                val logs = uiState.logFile
-                if (logs != null) {
-                    // verbose logs available
-                    zip.putNextEntry(ZipEntry(logs.name))
-                    Files.copy(logs, zip)
-                    zip.closeEntry()
-                } else {
-                    // logcat (short logs)
-                    try {
-                        Runtime.getRuntime().exec("logcat -d").also { logcat ->
-                            zip.putNextEntry(ZipEntry("logcat.txt"))
-                            ByteStreams.copy(logcat.inputStream, zip)
-                        }
-                    } catch (e: Exception) {
-                        logger.log(Level.SEVERE, "Couldn't attach logcat", e)
-                    }
-                }
-            }
-
-            // success, show ZIP file
-            uiState = uiState.copy(zipFile = file)
-        } catch (e: Exception) {
-            logger.log(Level.SEVERE, "Couldn't generate debug info ZIP", e)
-            uiState = uiState.copy(error = e.localizedMessage)
-        } finally {
-            uiState = uiState.copy(zipInProgress = false)
-        }
-    }
-
-
-    /**
-     * Appends relevant android account information the given writer.
-     *
-     * Note: Helper method of [generateDebugInfo].
-     */
-    @WorkerThread
-    private fun dumpAccount(account: Account, writer: Writer) {
-        writer.append("\n\n - Account: ${account.name}\n")
-        val accountSettings = accountSettingsFactory.create(account)
-
-        writer.append(dumpAccount(account, accountSettings, AccountDumpInfo.caldavAccount(context, account)))
-        try {
-            val credentials = accountSettings.credentials()
-            val authStr = mutableListOf<String>()
-            if (credentials.username != null)
-                authStr += "user name"
-            if (credentials.password != null)
-                authStr += "password"
-            if (credentials.certificateAlias != null)
-                authStr += "client certificate"
-            credentials.authState?.let { authState ->
-                authStr += "OAuth [${authState.authorizationServiceConfiguration?.authorizationEndpoint}]"
-            }
-            if (authStr.isNotEmpty())
-                writer  .append("  Authentication: ")
-                    .append(authStr.joinToString(", "))
-                    .append("\n")
-
-            writer.append("  WiFi only: ${accountSettings.getSyncWifiOnly()}")
-            accountSettings.getSyncWifiOnlySSIDs()?.let { ssids ->
-                writer.append(", SSIDs: ${ssids.joinToString(", ")}")
-            }
-            writer.append(
-                "\n  Contact group method: ${accountSettings.getGroupMethod()}\n" +
-                    "  Time range (past days): ${accountSettings.getTimeRangePastDays()}\n" +
-                    "  Default alarm (min before): ${accountSettings.getDefaultAlarm()}\n" +
-                    "  Manage calendar colors: ${accountSettings.getManageCalendarColors()}\n" +
-                    "  Use event colors: ${accountSettings.getEventColors()}\n"
-            )
-
-            writer.append("\nSync workers:\n")
-                .append(dumpSyncWorkersInfo(account))
-                .append("\n")
-        } catch (e: InvalidAccountException) {
-            writer.append("$e\n")
-        }
-        writer.append('\n')
-    }
-
-    /**
-     * Appends relevant address book type android account information to the given writer.
-     *
-     * Note: Helper method of [generateDebugInfo].
-     */
-    private fun dumpAddressBookAccount(account: Account, accountManager: AccountManager, writer: Writer) {
-        writer.append("  * Address book: ${account.name}\n")
-        val table = dumpAccount(account, null, AccountDumpInfo.addressBookAccount(account))
-        writer.append(TextTable.indent(table, 4))
-            .append("Collection ID: ${accountManager.getUserData(account, LocalAddressBook.USER_DATA_COLLECTION_ID)}\n")
-            .append("    URL: ${accountManager.getUserData(account, LocalAddressBook.USER_DATA_URL)}\n")
-            .append("    Read-only: ${accountManager.getUserData(account, LocalAddressBook.USER_DATA_READ_ONLY) ?: 0}\n\n")
-    }
-
-    /**
-     * Retrieves specified information from an android account
-     *
-     * Note: Helper method of [generateDebugInfo].
-     *
-     * @return the requested information
-     */
-    private fun dumpAccount(account: Account, accountSettings: AccountSettings?, infos: Iterable<AccountDumpInfo>): String {
-        val table = TextTable("Authority", "isSyncable", "syncAutomatically", "Interval", "Entries")
-        for (info in infos) {
-            var nrEntries = "—"
-            if (info.countUri != null)
-                try {
-                    context.contentResolver.acquireContentProviderClient(info.authority)?.use { client ->
-                        client.query(info.countUri, null, null, null, null)?.use { cursor ->
-                            nrEntries = "${cursor.count} ${info.countStr}"
-                        }
-                    }
-                } catch (e: Exception) {
-                    nrEntries = e.toString()
-                }
-            table.addLine(
-                info.authority,
-                ContentResolver.getIsSyncable(account, info.authority),
-                ContentResolver.getSyncAutomatically(account, info.authority),  // content-triggered sync
-                accountSettings?.getSyncInterval(info.authority)?.takeIf { it >= 0 }?.let {"${it/60} min"},
-                nrEntries
-            )
-        }
-        return table.toString()
-    }
-
-    /**
-     * Gets sync workers info
-     * Note: WorkManager does not return worker names when queried, so we create them and ask
-     * whether they exist one by one
-     */
-    private fun dumpSyncWorkersInfo(account: Account): String {
-        val table = TextTable("Tags", "Authority", "State", "Next run", "Retries", "Generation", "Periodicity")
-        listOf(
-            context.getString(R.string.address_books_authority),
-            CalendarContract.AUTHORITY,
-            TaskProvider.ProviderName.JtxBoard.authority,
-            TaskProvider.ProviderName.OpenTasks.authority,
-            TaskProvider.ProviderName.TasksOrg.authority
-        ).forEach { authority ->
-            val tag = BaseSyncWorker.commonTag(account, authority)
-            WorkManager.getInstance(context).getWorkInfos(
-                WorkQuery.Builder.fromTags(listOf(tag)).build()
-            ).get().forEach { workInfo ->
-                table.addLine(
-                    workInfo.tags.map { it.replace("\\bat\\.bitfire\\.davdroid\\.".toRegex(), ".") },
-                    authority,
-                    "${workInfo.state} (${workInfo.stopReason})",
-                    workInfo.nextScheduleTimeMillis.let { nextRun ->
-                        when (nextRun) {
-                            Long.MAX_VALUE -> "—"
-                            else -> DateUtils.getRelativeTimeSpanString(nextRun)
-                        }
-                    },
-                    workInfo.runAttemptCount,
-                    workInfo.generation,
-                    workInfo.periodicityInfo?.let { periodicity ->
-                        "every ${periodicity.repeatIntervalMillis/60000} min"
-                    } ?: "not periodic"
-                )
-            }
-        }
-        return table.toString()
-    }
-
-}
-
-data class AccountDumpInfo(
-    val account: Account,
-    val authority: String,
-    val countUri: Uri?,
-    val countStr: String?,
-) {
-
-    companion object {
-
-        fun caldavAccount(context: Context, account: Account) = listOf(
-            AccountDumpInfo(account, context.getString(R.string.address_books_authority), null, null),
-            AccountDumpInfo(account, CalendarContract.AUTHORITY, CalendarContract.Events.CONTENT_URI.asCalendarSyncAdapter(account), "event(s)"),
-            AccountDumpInfo(account, TaskProvider.ProviderName.JtxBoard.authority, JtxContract.JtxICalObject.CONTENT_URI.asJtxSyncAdapter(account), "jtx Board ICalObject(s)"),
-            AccountDumpInfo(account, TaskProvider.ProviderName.OpenTasks.authority, TaskContract.Tasks.getContentUri(
-                TaskProvider.ProviderName.OpenTasks.authority).asCalendarSyncAdapter(account), "OpenTasks task(s)"),
-            AccountDumpInfo(account, TaskProvider.ProviderName.TasksOrg.authority, TaskContract.Tasks.getContentUri(
-                TaskProvider.ProviderName.TasksOrg.authority).asCalendarSyncAdapter(account), "tasks.org task(s)"),
-            AccountDumpInfo(account, ContactsContract.AUTHORITY, ContactsContract.RawContacts.CONTENT_URI.asContactsSyncAdapter(account), "wrongly assigned raw contact(s)")
-        )
-
-        fun addressBookAccount(account: Account) = listOf(
-            AccountDumpInfo(account, ContactsContract.AUTHORITY, ContactsContract.RawContacts.CONTENT_URI.asContactsSyncAdapter(account), "raw contact(s)")
-        )
-
-    }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/ui/account/AccountProgressUseCase.kt

@@ -1,79 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.ui.account
-
-import android.accounts.Account
-import android.content.Context
-import androidx.work.WorkInfo
-import at.bitfire.davdroid.db.Service
-import at.bitfire.davdroid.servicedetection.RefreshCollectionsWorker
-import at.bitfire.davdroid.sync.worker.BaseSyncWorker
-import at.bitfire.davdroid.sync.worker.OneTimeSyncWorker
-import dagger.hilt.android.qualifiers.ApplicationContext
-import kotlinx.coroutines.ExperimentalCoroutinesApi
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.combine
-import kotlinx.coroutines.flow.flatMapLatest
-import kotlinx.coroutines.flow.flowOf
-import javax.inject.Inject
-
-class AccountProgressUseCase @Inject constructor(
-    @ApplicationContext val context: Context
-) {
-
-    operator fun invoke(
-        account: Account,
-        serviceFlow: Flow<Service?>,
-        authoritiesFlow: Flow<List<String>>
-    ): Flow<AccountProgress> {
-        val serviceRefreshing = isServiceRefreshing(serviceFlow)
-        val syncPending = isSyncPending(account, authoritiesFlow)
-        val syncRunning = isSyncRunning(account, authoritiesFlow)
-
-        return combine(serviceRefreshing, syncPending, syncRunning) { refreshing, pending, syncing ->
-            when {
-                refreshing || syncing -> AccountProgress.Active
-                pending -> AccountProgress.Pending
-                else -> AccountProgress.Idle
-            }
-        }
-    }
-
-    @OptIn(ExperimentalCoroutinesApi::class)
-    fun isServiceRefreshing(serviceFlow: Flow<Service?>): Flow<Boolean> =
-        serviceFlow.flatMapLatest { service ->
-            if (service == null)
-                flowOf(false)
-            else
-                RefreshCollectionsWorker.existsFlow(context, RefreshCollectionsWorker.workerName(service.id))
-        }
-
-    @OptIn(ExperimentalCoroutinesApi::class)
-    fun isSyncPending(account: Account, authoritiesFlow: Flow<List<String>>): Flow<Boolean> =
-        authoritiesFlow.flatMapLatest { authorities ->
-            BaseSyncWorker.exists(
-                context = context,
-                workStates = listOf(WorkInfo.State.ENQUEUED),
-                account = account,
-                authorities = authorities,
-                whichTag = { _, authority ->
-                    // we are only interested in pending OneTimeSyncWorkers because there's always a pending PeriodicSyncWorker
-                    OneTimeSyncWorker.workerName(account, authority)
-                }
-            )
-        }
-
-    @OptIn(ExperimentalCoroutinesApi::class)
-    fun isSyncRunning(account: Account, authoritiesFlow: Flow<List<String>>): Flow<Boolean> =
-        authoritiesFlow.flatMapLatest { authorities ->
-            BaseSyncWorker.exists(
-                context = context,
-                workStates = listOf(WorkInfo.State.RUNNING),
-                account = account,
-                authorities = authorities
-            )
-        }
-
-}

app/src/main/kotlin/at/bitfire/davdroid/ui/account/GetServiceCollectionPagerUseCase.kt

@@ -1,77 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.ui.account
-
-import androidx.paging.Pager
-import androidx.paging.PagingConfig
-import androidx.paging.PagingData
-import androidx.paging.map
-import at.bitfire.davdroid.db.Collection
-import at.bitfire.davdroid.db.Service
-import at.bitfire.davdroid.repository.DavCollectionRepository
-import at.bitfire.davdroid.settings.AccountSettings
-import at.bitfire.davdroid.settings.Settings
-import at.bitfire.davdroid.settings.SettingsManager
-import kotlinx.coroutines.ExperimentalCoroutinesApi
-import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.combine
-import kotlinx.coroutines.flow.flattenConcat
-import kotlinx.coroutines.flow.flowOf
-import kotlinx.coroutines.flow.map
-import javax.inject.Inject
-
-/**
- * Gets a list of collections for a service and type, optionally filtered by "show only personal" setting.
- *
- * Takes the "force read-only address books" setting into account: if set, all address books will have "forceReadOnly" set.
- */
-class GetServiceCollectionPagerUseCase @Inject constructor(
-    val collectionRepository: DavCollectionRepository,
-    val settings: SettingsManager
-) {
-
-    companion object {
-        const val PAGER_SIZE = 20
-    }
-
-    val forceReadOnlyAddressBooksFlow = settings.getBooleanFlow(Settings.FORCE_READ_ONLY_ADDRESSBOOKS, false)
-
-
-    @OptIn(ExperimentalCoroutinesApi::class)
-    operator fun invoke(
-        serviceFlow: Flow<Service?>,
-        collectionType: String,
-        showOnlyPersonalFlow: Flow<AccountSettings.ShowOnlyPersonal?>
-    ): Flow<PagingData<Collection>> =
-        combine(serviceFlow, showOnlyPersonalFlow, forceReadOnlyAddressBooksFlow) { service, onlyPersonal, forceReadOnlyAddressBooks ->
-            if (service == null)
-                flowOf(PagingData.empty<Collection>())
-            else {
-                val dataFlow = Pager(
-                    config = PagingConfig(PAGER_SIZE),
-                    pagingSourceFactory = {
-                        if (onlyPersonal?.onlyPersonal == true)
-                            collectionRepository.pagePersonalByServiceAndType(service.id, collectionType)
-                        else
-                            collectionRepository.pageByServiceAndType(service.id, collectionType)
-                    }
-                ).flow
-
-                // generate resulting flow; set "forceReadOnly" for every address book if requested
-                if (forceReadOnlyAddressBooks)
-                    dataFlow.map { pagingData ->
-                        pagingData.map { collection ->
-                            if (collectionType == Collection.TYPE_ADDRESSBOOK)
-                                collection.copy(forceReadOnly = true)
-                            else
-                                collection
-                        }
-                    }
-                else
-                    dataFlow
-            }
-        }.flattenConcat()
-
-}

app/src/main/kotlin/at/bitfire/davdroid/ui/composable/PasswordTextField.kt

@@ -1,118 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.ui.composable
-
-import androidx.compose.foundation.focusGroup
-import androidx.compose.foundation.text.KeyboardActions
-import androidx.compose.foundation.text.KeyboardOptions
-import androidx.compose.material.icons.Icons
-import androidx.compose.material.icons.filled.Visibility
-import androidx.compose.material.icons.filled.VisibilityOff
-import androidx.compose.material3.Icon
-import androidx.compose.material3.IconButton
-import androidx.compose.material3.OutlinedTextField
-import androidx.compose.material3.Text
-import androidx.compose.runtime.Composable
-import androidx.compose.runtime.getValue
-import androidx.compose.runtime.mutableStateOf
-import androidx.compose.runtime.remember
-import androidx.compose.runtime.setValue
-import androidx.compose.ui.Modifier
-import androidx.compose.ui.res.stringResource
-import androidx.compose.ui.text.input.KeyboardType
-import androidx.compose.ui.text.input.PasswordVisualTransformation
-import androidx.compose.ui.text.input.VisualTransformation
-import androidx.compose.ui.tooling.preview.Preview
-import at.bitfire.davdroid.R
-
-@Composable
-fun PasswordTextField(
-    password: String,
-    labelText: String?,
-    onPasswordChange: (String) -> Unit,
-    modifier: Modifier = Modifier,
-    leadingIcon: @Composable (() -> Unit)? = null,
-    keyboardOptions: KeyboardOptions = KeyboardOptions(keyboardType = KeyboardType.Password),
-    keyboardActions: KeyboardActions = KeyboardActions.Default,
-    enabled: Boolean = true,
-    readOnly: Boolean = false,
-    isError: Boolean = false
-) {
-    var passwordVisible by remember { mutableStateOf(false) }
-
-    OutlinedTextField(
-        value = password,
-        onValueChange = onPasswordChange,
-        label = labelText?.let { { Text(it) } },
-        leadingIcon = leadingIcon,
-        isError = isError,
-        singleLine = true,
-        enabled = enabled,
-        readOnly = readOnly,
-        modifier = modifier.focusGroup(),
-        keyboardOptions = keyboardOptions,
-        keyboardActions = keyboardActions,
-        visualTransformation = if (passwordVisible) VisualTransformation.None else PasswordVisualTransformation(),
-        trailingIcon = {
-            IconButton(
-                enabled = enabled,
-                onClick = { passwordVisible = !passwordVisible }
-            ) {
-                if (passwordVisible)
-                    Icon(Icons.Default.VisibilityOff, stringResource(R.string.login_password_hide))
-                else
-                    Icon(Icons.Default.Visibility, stringResource(R.string.login_password_show))
-            }
-        }
-    )
-}
-
-@Composable
-@Preview
-fun PasswordTextField_Sample() {
-    PasswordTextField(
-        password = "",
-        labelText = "labelText",
-        enabled = true,
-        isError = false,
-        onPasswordChange = {},
-    )
-}
-
-@Composable
-@Preview
-fun PasswordTextField_Sample_Filled() {
-    PasswordTextField(
-        password = "password",
-        labelText = "labelText",
-        enabled = true,
-        isError = false,
-        onPasswordChange = {},
-    )
-}
-
-@Composable
-@Preview
-fun PasswordTextField_Sample_Error() {
-    PasswordTextField(
-        password = "password",
-        labelText = "labelText",
-        enabled = true,
-        isError = true,
-        onPasswordChange = {},
-    )
-}
-
-@Composable
-@Preview
-fun PasswordTextField_Sample_Disabled() {
-    PasswordTextField(
-        password = "password",
-        labelText = "labelText",
-        enabled = false,
-        isError = false,
-        onPasswordChange = {},
-    )
-}

app/src/main/kotlin/at/bitfire/davdroid/ui/widget/SyncButtonWidgetReceiver.kt

@@ -1,12 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.ui.widget
-
-import androidx.glance.appwidget.GlanceAppWidget
-import androidx.glance.appwidget.GlanceAppWidgetReceiver
-
-class SyncButtonWidgetReceiver : GlanceAppWidgetReceiver() {
-    override val glanceAppWidget: GlanceAppWidget = SyncButtonWidget()
-}

app/src/main/kotlin/at/bitfire/davdroid/util/CompatUtils.kt

@@ -1,27 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.util
-
-import android.accounts.Account
-import android.accounts.AccountManager
-import java.util.logging.Logger
-
-/**
- * [AccountManager.setUserData] has been found to be unreliable at times. This extension function
- * checks whether the user data has actually been set and retries up to ten times before failing silently.
- *
- * It should only be used to store the reference to the database (like the collection ID that this account represents).
- * Everything else should be in the DB.
- */
-fun AccountManager.setAndVerifyUserData(account: Account, key: String, value: String?) {
-    for (i in 1..10) {
-        setUserData(account, key, value)
-        if (getUserData(account, key) == value)
-            return /* success */
-
-        Thread.sleep(100)
-    }
-    Logger.getGlobal().warning("AccountManager failed to set $account user data $key := $value")
-}

app/src/main/kotlin/at/bitfire/davdroid/webdav/DavDocumentsProvider.kt

@@ -1,782 +0,0 @@
-/*
- * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
- */
-
-package at.bitfire.davdroid.webdav
-
-import android.app.AuthenticationRequiredException
-import android.app.PendingIntent
-import android.content.Context
-import android.content.Intent
-import android.content.res.AssetFileDescriptor
-import android.database.Cursor
-import android.database.MatrixCursor
-import android.graphics.Bitmap
-import android.graphics.BitmapFactory
-import android.graphics.Point
-import android.media.ThumbnailUtils
-import android.net.ConnectivityManager
-import android.os.Build
-import android.os.CancellationSignal
-import android.os.ParcelFileDescriptor
-import android.os.storage.StorageManager
-import android.provider.DocumentsContract.Document
-import android.provider.DocumentsContract.Root
-import android.provider.DocumentsContract.buildChildDocumentsUri
-import android.provider.DocumentsContract.buildRootsUri
-import android.provider.DocumentsProvider
-import android.webkit.MimeTypeMap
-import androidx.annotation.WorkerThread
-import androidx.core.content.getSystemService
-import at.bitfire.dav4jvm.DavCollection
-import at.bitfire.dav4jvm.DavResource
-import at.bitfire.dav4jvm.Response
-import at.bitfire.dav4jvm.exception.HttpException
-import at.bitfire.dav4jvm.property.webdav.CurrentUserPrivilegeSet
-import at.bitfire.dav4jvm.property.webdav.DisplayName
-import at.bitfire.dav4jvm.property.webdav.GetContentLength
-import at.bitfire.dav4jvm.property.webdav.GetContentType
-import at.bitfire.dav4jvm.property.webdav.GetETag
-import at.bitfire.dav4jvm.property.webdav.GetLastModified
-import at.bitfire.dav4jvm.property.webdav.QuotaAvailableBytes
-import at.bitfire.dav4jvm.property.webdav.QuotaUsedBytes
-import at.bitfire.dav4jvm.property.webdav.ResourceType
-import at.bitfire.davdroid.R
-import at.bitfire.davdroid.db.AppDatabase
-import at.bitfire.davdroid.db.WebDavDocument
-import at.bitfire.davdroid.network.HttpClient
-import at.bitfire.davdroid.network.MemoryCookieStore
-import at.bitfire.davdroid.ui.webdav.WebdavMountsActivity
-import at.bitfire.davdroid.webdav.DavDocumentsProvider.DavDocumentsActor
-import at.bitfire.davdroid.webdav.cache.HeadResponseCache
-import at.bitfire.davdroid.webdav.cache.ThumbnailCache
-import dagger.hilt.EntryPoint
-import dagger.hilt.EntryPoints
-import dagger.hilt.InstallIn
-import dagger.hilt.android.EntryPointAccessors
-import dagger.hilt.components.SingletonComponent
-import kotlinx.coroutines.CoroutineScope
-import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.async
-import kotlinx.coroutines.cancel
-import kotlinx.coroutines.launch
-import kotlinx.coroutines.runBlocking
-import kotlinx.coroutines.runInterruptible
-import kotlinx.coroutines.withTimeout
-import okhttp3.CookieJar
-import okhttp3.HttpUrl
-import okhttp3.MediaType.Companion.toMediaTypeOrNull
-import okhttp3.RequestBody.Companion.toRequestBody
-import okhttp3.logging.HttpLoggingInterceptor
-import java.io.ByteArrayOutputStream
-import java.io.FileNotFoundException
-import java.net.HttpURLConnection
-import java.util.concurrent.ConcurrentHashMap
-import java.util.logging.Level
-import java.util.logging.Logger
-
-/**
- * Provides functionality on WebDav documents.
- *
- * Actual implementation should go into [DavDocumentsActor].
- */
-class DavDocumentsProvider: DocumentsProvider() {
-
-    @EntryPoint
-    @InstallIn(SingletonComponent::class)
-    interface DavDocumentsProviderEntryPoint {
-        fun appDatabase(): AppDatabase
-        fun logger(): Logger
-        fun randomAccessCallbackWrapperFactory(): RandomAccessCallbackWrapper.Factory
-        fun streamingFileDescriptorFactory(): StreamingFileDescriptor.Factory
-        fun webdavComponentBuilder(): WebdavComponentBuilder
-    }
-
-    @EntryPoint
-    @InstallIn(WebdavComponent::class)
-    interface DavDocumentsProviderWebdavEntryPoint {
-        fun credentialsStore(): CredentialsStore
-        fun headResponseCache(): HeadResponseCache
-        fun thumbnailCache(): ThumbnailCache
-    }
-
-    companion object {
-        val DAV_FILE_FIELDS = arrayOf(
-            ResourceType.NAME,
-            CurrentUserPrivilegeSet.NAME,
-            DisplayName.NAME,
-            GetETag.NAME,
-            GetContentType.NAME,
-            GetContentLength.NAME,
-            GetLastModified.NAME,
-            QuotaAvailableBytes.NAME,
-            QuotaUsedBytes.NAME,
-        )
-
-        const val MAX_NAME_ATTEMPTS = 5
-        const val THUMBNAIL_TIMEOUT_MS = 15000L
-
-        fun notifyMountsChanged(context: Context) {
-            context.contentResolver.notifyChange(buildRootsUri(context.getString(R.string.webdav_authority)), null)
-        }
-    }
-
-    private val ourContext by lazy { context!! }        // requireContext() requires API level 30
-    private val authority by lazy { ourContext.getString(R.string.webdav_authority) }
-    private val globalEntryPoint by lazy { EntryPointAccessors.fromApplication<DavDocumentsProviderEntryPoint>(ourContext) }
-    private val webdavEntryPoint by lazy {
-        EntryPoints.get(
-            globalEntryPoint.webdavComponentBuilder().build(),
-            DavDocumentsProviderWebdavEntryPoint::class.java
-        )
-    }
-
-    private val logger by lazy { globalEntryPoint.logger() }
-
-    private val db by lazy { globalEntryPoint.appDatabase() }
-    private val mountDao by lazy { db.webDavMountDao() }
-    private val documentDao by lazy { db.webDavDocumentDao() }
-
-    private val credentialsStore by lazy { webdavEntryPoint.credentialsStore() }
-    private val cookieStore by lazy { mutableMapOf<Long, CookieJar>() }
-    private val headResponseCache by lazy { webdavEntryPoint.headResponseCache() }
-    private val thumbnailCache by lazy { webdavEntryPoint.thumbnailCache() }
-
-    private val connectivityManager by lazy { ourContext.getSystemService<ConnectivityManager>()!! }
-    private val storageManager by lazy { ourContext.getSystemService<StorageManager>()!! }
-
-    /** List of currently active [queryChildDocuments] runners.
-     *
-     *  Key: document ID (directory) for which children are listed.
-     *  Value: whether the runner is still running (*true*) or has already finished (*false*).
-     */
-    private val runningQueryChildren = ConcurrentHashMap<Long, Boolean>()
-
-    private val actor by lazy { DavDocumentsActor(ourContext, db, logger, cookieStore, credentialsStore, authority) }
-
-    override fun onCreate() = true
-
-
-    /*** query ***/
-
-    override fun queryRoots(projection: Array<out String>?): Cursor {
-        logger.fine("WebDAV queryRoots")
-        val roots = MatrixCursor(projection ?: arrayOf(
-            Root.COLUMN_ROOT_ID,
-            Root.COLUMN_ICON,
-            Root.COLUMN_TITLE,
-            Root.COLUMN_FLAGS,
-            Root.COLUMN_DOCUMENT_ID,
-            Root.COLUMN_SUMMARY
-        ))
-
-        for (mount in mountDao.getAll()) {
-            val rootDocument = documentDao.getOrCreateRoot(mount)
-            logger.info("Root ID: $rootDocument")
-
-            roots.newRow().apply {
-                add(Root.COLUMN_ROOT_ID, mount.id)
-                add(Root.COLUMN_ICON, R.mipmap.ic_launcher)
-                add(Root.COLUMN_TITLE, ourContext.getString(R.string.webdav_provider_root_title))
-                add(Root.COLUMN_DOCUMENT_ID, rootDocument.id.toString())
-                add(Root.COLUMN_SUMMARY, mount.name)
-                add(Root.COLUMN_FLAGS, Root.FLAG_SUPPORTS_CREATE or Root.FLAG_SUPPORTS_IS_CHILD)
-
-                val quotaAvailable = rootDocument.quotaAvailable
-                if (quotaAvailable != null)
-                    add(Root.COLUMN_AVAILABLE_BYTES, quotaAvailable)
-
-                val quotaUsed = rootDocument.quotaUsed
-                if (quotaAvailable != null && quotaUsed != null)
-                    add(Root.COLUMN_CAPACITY_BYTES, quotaAvailable + quotaUsed)
-            }
-        }
-
-        return roots
-    }
-
-    override fun queryDocument(documentId: String, projection: Array<out String>?): Cursor {
-        logger.fine("WebDAV queryDocument $documentId ${projection?.joinToString("+")}")
-
-        val doc = documentDao.get(documentId.toLong()) ?: throw FileNotFoundException()
-        val parent = doc.parentId?.let { parentId ->
-            documentDao.get(parentId)
-        }
-
-        return DocumentsCursor(projection ?: arrayOf(
-            Document.COLUMN_DOCUMENT_ID,
-            Document.COLUMN_DISPLAY_NAME,
-            Document.COLUMN_MIME_TYPE,
-            Document.COLUMN_FLAGS,
-            Document.COLUMN_SIZE,
-            Document.COLUMN_LAST_MODIFIED,
-            Document.COLUMN_ICON,
-            Document.COLUMN_SUMMARY
-        )).apply {
-            val bundle = doc.toBundle(parent)
-            logger.fine("queryDocument($documentId) = $bundle")
-
-            // override display names of root documents
-            if (parent == null) {
-                val mount = mountDao.getById(doc.mountId)
-                bundle.putString(Document.COLUMN_DISPLAY_NAME, mount.name)
-            }
-
-            addRow(bundle)
-        }
-    }
-
-    /**
-     * Gets old or new children of given parent.
-     *
-     * Dispatches a worker querying the server for new children of given parent, and instantly
-     * returns old children (or nothing, on initial call).
-     * Once the worker finishes its query, it notifies the [android.content.ContentResolver] about
-     * change, which calls this method again. The worker being done
-     */
-    @Synchronized
-    override fun queryChildDocuments(parentDocumentId: String, projection: Array<out String>?, sortOrder: String?): Cursor {
-        logger.fine("WebDAV queryChildDocuments $parentDocumentId $projection $sortOrder")
-        val parentId = parentDocumentId.toLong()
-        val parent = documentDao.get(parentId) ?: throw FileNotFoundException()
-
-        val columns = projection ?: arrayOf(
-            Document.COLUMN_DOCUMENT_ID,
-            Document.COLUMN_DISPLAY_NAME,
-            Document.COLUMN_MIME_TYPE,
-            Document.COLUMN_FLAGS,
-            Document.COLUMN_SIZE,
-            Document.COLUMN_LAST_MODIFIED
-        )
-
-        // Register watcher
-        val result = DocumentsCursor(columns)
-        val notificationUri = buildChildDocumentsUri(authority, parentDocumentId)
-        result.setNotificationUri(ourContext.contentResolver, notificationUri)
-
-        // Dispatch worker querying for the children and keep track of it
-        val running = runningQueryChildren.getOrPut(parentId) {
-            CoroutineScope(Dispatchers.IO).launch {
-                actor.queryChildren(parent)
-                // Once the query is done, set query as finished (not running)
-                runningQueryChildren[parentId] = false
-                // .. and notify - effectively calling this method again
-                ourContext.contentResolver.notifyChange(notificationUri, null)
-            }
-            true
-        }
-
-        if (running)        // worker still running
-            result.loading = true
-        else                // remove worker from list if done
-            runningQueryChildren.remove(parentId)
-
-        // Regardless of whether the worker is done, return the children we already have
-        for (child in documentDao.getChildren(parentId)) {
-            val bundle = child.toBundle(parent)
-            result.addRow(bundle)
-        }
-
-        return result
-    }
-
-    override fun isChildDocument(parentDocumentId: String, documentId: String): Boolean {
-        logger.fine("WebDAV isChildDocument $parentDocumentId $documentId")
-        val parent = documentDao.get(parentDocumentId.toLong()) ?: throw FileNotFoundException()
-
-        var iter: WebDavDocument? = documentDao.get(documentId.toLong()) ?: throw FileNotFoundException()
-        while (iter != null) {
-            val currentParentId = iter.parentId
-            if (currentParentId == parent.id)
-                return true
-
-            iter = if (currentParentId != null)
-                documentDao.get(currentParentId)
-            else
-                null
-        }
-        return false
-    }
-
-
-    /*** copy/create/delete/move/rename ***/
-
-    override fun copyDocument(sourceDocumentId: String, targetParentDocumentId: String): String {
-        logger.fine("WebDAV copyDocument $sourceDocumentId $targetParentDocumentId")
-        val srcDoc = documentDao.get(sourceDocumentId.toLong()) ?: throw FileNotFoundException()
-        val dstFolder = documentDao.get(targetParentDocumentId.toLong()) ?: throw FileNotFoundException()
-        val name = srcDoc.name
-
-        if (srcDoc.mountId != dstFolder.mountId)
-            throw UnsupportedOperationException("Can't COPY between WebDAV servers")
-
-        val dstDocId: String
-        actor.httpClient(srcDoc.mountId).use { client ->
-            val dav = DavResource(client.okHttpClient, srcDoc.toHttpUrl(db))
-            try {
-                val dstUrl = dstFolder.toHttpUrl(db).newBuilder()
-                    .addPathSegment(name)
-                    .build()
-                dav.copy(dstUrl, false) {
-                    // successfully copied
-                }
-
-                dstDocId = documentDao.insertOrReplace(WebDavDocument(
-                    mountId = dstFolder.mountId,
-                    parentId = dstFolder.id,
-                    name = name,
-                    isDirectory = srcDoc.isDirectory,
-                    displayName = srcDoc.displayName,
-                    mimeType = srcDoc.mimeType,
-                    size = srcDoc.size
-                )).toString()
-
-                actor.notifyFolderChanged(targetParentDocumentId)
-            } catch (e: HttpException) {
-                if (e.code == HttpURLConnection.HTTP_NOT_FOUND)
-                    throw FileNotFoundException()
-                throw e
-            }
-        }
-
-        return dstDocId
-    }
-
-    override fun createDocument(parentDocumentId: String, mimeType: String, displayName: String): String? {
-        logger.fine("WebDAV createDocument $parentDocumentId $mimeType $displayName")
-        val parent = documentDao.get(parentDocumentId.toLong()) ?: throw FileNotFoundException()
-        val parentUrl = parent.toHttpUrl(db)
-        val createDirectory = mimeType == Document.MIME_TYPE_DIR
-
-        var docId: Long? = null
-        actor.httpClient(parent.mountId).use { client ->
-            for (attempt in 0..MAX_NAME_ATTEMPTS) {
-                val newName = displayNameToMemberName(displayName, attempt)
-                val newLocation = parentUrl.newBuilder()
-                    .addPathSegment(newName)
-                    .build()
-                val doc = DavResource(client.okHttpClient, newLocation)
-                try {
-                    if (createDirectory)
-                        doc.mkCol(null) {
-                            // directory successfully created
-                        }
-                    else
-                        doc.put("".toRequestBody(null), ifNoneMatch = true) {
-                            // document successfully created
-                        }
-
-                    docId = documentDao.insertOrReplace(WebDavDocument(
-                        mountId = parent.mountId,
-                        parentId = parent.id,
-                        name = newName,
-                        mimeType = mimeType.toMediaTypeOrNull(),
-                        isDirectory = createDirectory
-                    ))
-
-                    actor.notifyFolderChanged(parentDocumentId)
-                    break
-                } catch (e: HttpException) {
-                    e.throwForDocumentProvider(true)
-                }
-            }
-        }
-
-        return docId?.toString()
-    }
-
-    override fun deleteDocument(documentId: String) {
-        logger.fine("WebDAV removeDocument $documentId")
-        val doc = documentDao.get(documentId.toLong()) ?: throw FileNotFoundException()
-        actor.httpClient(doc.mountId).use { client ->
-            val dav = DavResource(client.okHttpClient, doc.toHttpUrl(db))
-            try {
-                dav.delete {
-                    // successfully deleted
-                }
-                logger.fine("Successfully removed")
-                documentDao.delete(doc)
-
-                actor.notifyFolderChanged(doc.parentId)
-            } catch (e: HttpException) {
-                e.throwForDocumentProvider()
-            }
-        }
-    }
-
-    override fun moveDocument(sourceDocumentId: String, sourceParentDocumentId: String, targetParentDocumentId: String): String {
-        logger.fine("WebDAV moveDocument $sourceDocumentId $sourceParentDocumentId $targetParentDocumentId")
-        val doc = documentDao.get(sourceDocumentId.toLong()) ?: throw FileNotFoundException()
-        val dstParent = documentDao.get(targetParentDocumentId.toLong()) ?: throw FileNotFoundException()
-
-        if (doc.mountId != dstParent.mountId)
-            throw UnsupportedOperationException("Can't MOVE between WebDAV servers")
-
-        val newLocation = dstParent.toHttpUrl(db).newBuilder()
-            .addPathSegment(doc.name)
-            .build()
-
-        actor.httpClient(doc.mountId).use { client ->
-            val dav = DavResource(client.okHttpClient, doc.toHttpUrl(db))
-            try {
-                dav.move(newLocation, false) {
-                    // successfully moved
-                }
-
-                doc.parentId = dstParent.id
-                documentDao.update(doc)
-
-                actor.notifyFolderChanged(sourceParentDocumentId)
-                actor.notifyFolderChanged(targetParentDocumentId)
-            } catch (e: HttpException) {
-                e.throwForDocumentProvider()
-            }
-        }
-
-        return doc.id.toString()
-    }
-
-    override fun renameDocument(documentId: String, displayName: String): String? {
-        logger.fine("WebDAV renameDocument $documentId $displayName")
-        val doc = documentDao.get(documentId.toLong()) ?: throw FileNotFoundException()
-        val oldUrl = doc.toHttpUrl(db)
-        actor.httpClient(doc.mountId).use { client ->
-            for (attempt in 0..MAX_NAME_ATTEMPTS) {
-                val newName = displayNameToMemberName(displayName, attempt)
-                val newLocation = oldUrl.newBuilder()
-                    .removePathSegment(oldUrl.pathSegments.lastIndex)
-                    .addPathSegment(newName)
-                    .build()
-                try {
-                    val dav = DavResource(client.okHttpClient, oldUrl)
-                    dav.move(newLocation, false) {
-                        // successfully renamed
-                    }
-                    doc.name = newName
-                    documentDao.update(doc)
-
-                    actor.notifyFolderChanged(doc.parentId)
-                    return doc.id.toString()
-                } catch (e: HttpException) {
-                    e.throwForDocumentProvider(true)
-                }
-            }
-        }
-        return null
-    }
-
-    private fun displayNameToMemberName(displayName: String, appendNumber: Int = 0): String {
-        val safeName = displayName.filterNot { it.isISOControl() }
-
-        if (appendNumber != 0) {
-            val extension: String? = MimeTypeMap.getFileExtensionFromUrl(displayName)
-            if (extension != null) {
-                val baseName = safeName.removeSuffix(".$extension")
-                return "${baseName}_$appendNumber.$extension"
-            } else
-                return "${safeName}_$appendNumber"
-        } else
-            return safeName
-    }
-
-
-    /*** read/write ***/
-
-    private fun headRequest(client: HttpClient, url: HttpUrl, signal: CancellationSignal?): HeadResponse {
-        val response = CoroutineScope(Dispatchers.IO).async {
-            runInterruptible {
-                HeadResponse.fromUrl(client, url)
-            }
-        }
-        signal?.setOnCancelListener {
-            response.cancel("Cancelled by signal")
-        }
-        return runBlocking {
-            response.await()
-        }
-    }
-
-    override fun openDocument(documentId: String, mode: String, signal: CancellationSignal?): ParcelFileDescriptor {
-        logger.fine("WebDAV openDocument $documentId $mode $signal")
-
-        val doc = documentDao.get(documentId.toLong()) ?: throw FileNotFoundException()
-        val url = doc.toHttpUrl(db)
-        val client = actor.httpClient(doc.mountId, logBody = false)
-
-        val modeFlags = ParcelFileDescriptor.parseMode(mode)
-        val readAccess = when (mode) {
-            "r" -> true
-            "w", "wt" -> false
-            else -> throw UnsupportedOperationException("Mode $mode not supported by WebDAV")
-        }
-
-        val cacheKey = doc.cacheKey()
-        val fileInfo = if (cacheKey != null)
-            headResponseCache.get(cacheKey) {
-                headRequest(client, url, signal)
-            }
-        else
-            // don't try cache
-            headRequest(client, url, signal)
-        logger.fine("Received file info: $fileInfo")
-
-        // RandomAccessCallback.Wrapper / StreamingFileDescriptor are responsible for closing httpClient
-        return if (
-            Build.VERSION.SDK_INT >= 26 &&      // openProxyFileDescriptor exists since Android 8.0
-            readAccess &&                       // WebDAV doesn't support random write access natively
-            fileInfo.size != null &&            // file descriptor must return a useful value on getFileSize()
-            (fileInfo.eTag != null || fileInfo.lastModified != null) &&     // we need a method to determine whether the document has changed during access
-            fileInfo.supportsPartial == true    // WebDAV server must support random access
-        ) {
-            logger.fine("Creating RandomAccessCallback for $url")
-            val factory = globalEntryPoint.randomAccessCallbackWrapperFactory()
-            val accessor = factory.create(client, url, doc.mimeType, fileInfo, signal)
-            storageManager.openProxyFileDescriptor(modeFlags, accessor, accessor.workerHandler)
-        } else {
-            logger.fine("Creating StreamingFileDescriptor for $url")
-            val factory = globalEntryPoint.streamingFileDescriptorFactory()
-            val fd = factory.create(client, url, doc.mimeType, signal) { transferred ->
-                // called when transfer is finished
-
-                val now = System.currentTimeMillis()
-                if (!readAccess /* write access */) {
-                    // write access, update file size
-                    doc.size = transferred
-                    doc.lastModified = now
-                    documentDao.update(doc)
-                }
-
-                actor.notifyFolderChanged(doc.parentId)
-            }
-
-            if (readAccess)
-                fd.download()
-            else
-                fd.upload()
-        }
-    }
-
-    override fun openDocumentThumbnail(documentId: String, sizeHint: Point, signal: CancellationSignal?): AssetFileDescriptor? {
-        logger.info("openDocumentThumbnail documentId=$documentId sizeHint=$sizeHint signal=$signal")
-
-        if (connectivityManager.isActiveNetworkMetered)
-            // don't download the large images just to create a thumbnail on metered networks
-            return null
-
-        if (signal == null) {
-            // see https://github.com/zhanghai/MaterialFiles/issues/588
-            logger.warning("openDocumentThumbnail without cancellationSignal causes too much problems, please fix calling app")
-            return null
-        }
-
-        val doc = documentDao.get(documentId.toLong()) ?: throw FileNotFoundException()
-
-        val docCacheKey = doc.cacheKey()
-        if (docCacheKey == null) {
-            logger.warning("openDocumentThumbnail won't generate thumbnails when document state (ETag/Last-Modified) is unknown")
-            return null
-        }
-
-        val thumbFile = thumbnailCache.get(docCacheKey, sizeHint) {
-            // create thumbnail
-            val job = CoroutineScope(Dispatchers.IO).async {
-                withTimeout(THUMBNAIL_TIMEOUT_MS) {
-                    actor.httpClient(doc.mountId, logBody = false).use { client ->
-                        val url = doc.toHttpUrl(db)
-                        val dav = DavResource(client.okHttpClient, url)
-                        var result: ByteArray? = null
-                        runInterruptible {
-                            dav.get("image/*", null) { response ->
-                                response.body?.byteStream()?.use { data ->
-                                    BitmapFactory.decodeStream(data)?.let { bitmap ->
-                                        val thumb = ThumbnailUtils.extractThumbnail(bitmap, sizeHint.x, sizeHint.y)
-                                        val baos = ByteArrayOutputStream()
-                                        thumb.compress(Bitmap.CompressFormat.JPEG, 95, baos)
-                                        result = baos.toByteArray()
-                                    }
-                                }
-                            }
-                        }
-                        result
-                    }
-                }
-            }
-
-            signal.setOnCancelListener {
-                logger.fine("Cancelling thumbnail for ${doc.name}")
-                job.cancel("Cancelled by signal")
-            }
-
-            try {
-                runBlocking {
-                    job.await()
-                }
-            } catch (e: Exception) {
-                logger.log(Level.WARNING, "Couldn't generate thumbnail", e)
-                null
-            }
-        }
-
-        if (thumbFile != null)
-            return AssetFileDescriptor(
-                ParcelFileDescriptor.open(thumbFile, ParcelFileDescriptor.MODE_READ_ONLY),
-                0, thumbFile.length()
-            )
-
-        return null
-    }
-
-
-    /**
-     * Acts on behalf of [DavDocumentsProvider].
-     *
-     * Encapsulates functionality to make it easily testable without generating lots of
-     * DocumentProviders during the tests.
-     *
-     * By containing the actual implementation logic of [DavDocumentsProvider], it adds a layer of separation
-     * to make the methods of [DavDocumentsProvider] more easily testable.
-     * [DavDocumentsProvider]s methods should do nothing more, but to call [DavDocumentsActor]s methods.
-     */
-    class DavDocumentsActor(
-        private val context: Context,
-        private val db: AppDatabase,
-        private val logger: Logger,
-        private val cookieStore: MutableMap<Long, CookieJar>,
-        private val credentialsStore: CredentialsStore,
-        private val authority: String
-    ) {
-        private val documentDao = db.webDavDocumentDao()
-
-        /**
-         * Finds children of given parent [WebDavDocument]. After querying, it
-         * updates existing children, adds new ones or removes deleted ones.
-         *
-         * There must never be more than one running instance per [parent]!
-         *
-         * @param parent    folder to search for children
-         */
-        @WorkerThread
-        internal fun queryChildren(parent: WebDavDocument) {
-            val oldChildren = documentDao.getChildren(parent.id).associateBy { it.name }.toMutableMap() // "name" of file/folder must be unique
-            val newChildrenList = hashMapOf<String, WebDavDocument>()
-
-            httpClient(parent.mountId).use { client ->
-                val parentUrl = parent.toHttpUrl(db)
-                val folder = DavCollection(client.okHttpClient, parentUrl)
-
-                try {
-                    folder.propfind(1, *DAV_FILE_FIELDS) { response, relation ->
-                        logger.fine("$relation $response")
-
-                        val resource: WebDavDocument =
-                            when (relation) {
-                                Response.HrefRelation.SELF ->       // it's about the parent
-                                    parent
-                                Response.HrefRelation.MEMBER ->     // it's about a member
-                                    WebDavDocument(mountId = parent.mountId, parentId = parent.id, name = response.hrefName())
-                                else -> {
-                                    // we didn't request this; log a warning and ignore it
-                                    logger.warning("Ignoring unexpected $response $relation in $parentUrl")
-                                    return@propfind
-                                }
-                            }
-
-                        response[ResourceType::class.java]?.types?.let { types ->
-                            resource.isDirectory = types.contains(ResourceType.COLLECTION)
-                        }
-
-                        resource.displayName = response[DisplayName::class.java]?.displayName
-                        resource.mimeType = response[GetContentType::class.java]?.type
-                        response[GetETag::class.java]?.let { getETag ->
-                            if (!getETag.weak)
-                                resource.eTag = resource.eTag
-                        }
-                        resource.lastModified = response[GetLastModified::class.java]?.lastModified?.toEpochMilli()
-                        resource.size = response[GetContentLength::class.java]?.contentLength
-
-                        val privs = response[CurrentUserPrivilegeSet::class.java]
-                        resource.mayBind = privs?.mayBind
-                        resource.mayUnbind = privs?.mayUnbind
-                        resource.mayWriteContent = privs?.mayWriteContent
-
-                        resource.quotaAvailable = response[QuotaAvailableBytes::class.java]?.quotaAvailableBytes
-                        resource.quotaUsed = response[QuotaUsedBytes::class.java]?.quotaUsedBytes
-
-                        if (resource == parent)
-                            documentDao.update(resource)
-                        else {
-                            documentDao.insertOrUpdate(resource)
-                            newChildrenList[resource.name] = resource
-                        }
-
-                        // remove resource from known child nodes, because not found on server
-                        oldChildren.remove(resource.name)
-                    }
-                } catch (e: Exception) {
-                    logger.log(Level.WARNING, "Couldn't query children", e)
-                }
-            }
-
-            // Delete child nodes which were not rediscovered (deleted serverside)
-            for ((_, oldChild) in oldChildren)
-                documentDao.delete(oldChild)
-        }
-
-
-        // helpers
-
-        /**
-         * Creates a HTTP client that can be used to access resources in the given mount.
-         *
-         * @param mountId    ID of the mount to access
-         * @param logBody    whether to log the body of HTTP requests (disable for potentially large files)
-         */
-        internal fun httpClient(mountId: Long, logBody: Boolean = true): HttpClient {
-            val builder = HttpClient.Builder(
-                context = context,
-                loggerLevel = if (logBody) HttpLoggingInterceptor.Level.BODY else HttpLoggingInterceptor.Level.HEADERS
-            ).cookieStore(
-                cookieStore.getOrPut(mountId) { MemoryCookieStore() }
-            )
-
-            credentialsStore.getCredentials(mountId)?.let { credentials ->
-                builder.addAuthentication(null, credentials, true)
-            }
-
-            return builder.build()
-        }
-
-        internal fun notifyFolderChanged(parentDocumentId: Long?) {
-            if (parentDocumentId != null)
-                context.contentResolver.notifyChange(buildChildDocumentsUri(authority, parentDocumentId.toString()), null)
-        }
-
-        internal fun notifyFolderChanged(parentDocumentId: String) {
-            context.contentResolver.notifyChange(buildChildDocumentsUri(authority, parentDocumentId), null)
-        }
-
-
-    }
-
-
-    private fun HttpException.throwForDocumentProvider(ignorePreconditionFailed: Boolean = false) {
-        when (code) {
-            HttpURLConnection.HTTP_UNAUTHORIZED -> {
-                if (Build.VERSION.SDK_INT >= 26) {
-                    // TODO edit mount
-                    val intent = Intent(ourContext, WebdavMountsActivity::class.java)
-                    throw AuthenticationRequiredException(this, PendingIntent.getActivity(ourContext, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT or PendingIntent.FLAG_IMMUTABLE))
-                }
-            }
-            HttpURLConnection.HTTP_NOT_FOUND ->
-                throw FileNotFoundException()
-            HttpURLConnection.HTTP_PRECON_FAILED ->
-                if (ignorePreconditionFailed)
-                    return
-        }
-
-        // re-throw
-        throw this
-    }
-
-}