Updated name, package and color

Signed-off-by: Arnau Mora Gras <arnyminerz@proton.me>

.github/FUNDING.yml

@@ -0,0 +1,4 @@
+
+github: bitfireAT
+liberapay: DAVx5
+custom: 'https://www.davx5.com/donate'

.github/ISSUE_TEMPLATE/config.yml

@@ -0,0 +1,5 @@
+blank_issues_enabled: false
+contact_links:
+  - name: DAVx⁵ Community Support
+    url: https://github.com/bitfireAT/davx5-ose/discussions
+    about: Ask and answer questions (including feature requests and bug reports) here.

.github/ISSUE_TEMPLATE/qualified-bug.yml

@@ -0,0 +1,43 @@
+name: Qualified Bug Report
+description: "[Developers only] For qualified bug reports. (Use Discussions if unsure.)"
+labels: ["bug"]
+body:
+  - type: checkboxes
+    attributes:
+      label: Problem scope
+      description: Use Discussions if you're unsure which component (DAVx⁵, calendar app, server, …) causes your problem.
+      options:
+        - label: I'm sure that this is a DAVx⁵ problem.
+          required: true
+  - type: checkboxes
+    attributes:
+      label: App version
+      options:
+        - label: I'm using the latest available DAVx⁵ version.
+          required: true
+  - type: input
+    attributes:
+      label: Android version and device/firmware type
+      placeholder: "Android 13 (Samsung A32)"
+  - type: textarea
+    attributes:
+      label: Steps to reproduce
+      description: Provide detailed steps to reproduce the problem.
+      placeholder: |
+        1. Create DAVx⁵ account with Some Server (Version).
+        2. Sync Some Calendar.
+        3. SomeException appears.
+  - type: textarea
+    attributes:
+      label: Actual result
+      description: Describe what you DAVx⁵ currently does (and what is not expected).
+      placeholder: "Some Property in ICS file causes the whole synchronization to stop."
+  - type: textarea
+    attributes:
+      label: Expected result
+      description: Describe what you would expect DAVx⁵ to avoid/solve the problem.
+      placeholder: "Some Property in ICS file should be ignored even if faulty and sync should continue instead of showing an error."
+  - type: textarea
+    attributes:
+      label: Further info
+      description: Debug info, links to further information, …

.github/ISSUE_TEMPLATE/qualified-feature.yml

@@ -0,0 +1,19 @@
+name: Qualified Feature Request
+description: "[Developers only] For qualified feature requests. (Use Discussions if unsure.)"
+labels: ["enhancement"]
+body:
+  - type: checkboxes
+    attributes:
+      label: Scope
+      description: Use this form only for features that have been discussed in Discussions or if you're a DAVx5 developer.
+      options:
+        - label: I'm sure that this feature request belongs here and not into Discussions.
+          required: true
+  - type: textarea
+    attributes:
+      label: Description
+      description: Describe the requested feature and why it is desired.
+  - type: textarea
+    attributes:
+      label: Further info
+      description: How this could be implemented, links to further information, …

.github/pull_request_template.md

@@ -0,0 +1,38 @@
+
+Please delete this paragraph and other repeating text (like the examples) after reading and before submitting the PR.
+
+The PR should be in _Draft_ state during development. As soon as it's finished, it should be marked as _Ready for review_ and a reviewer should be chosen.
+
+See also: [Writing A Great Pull Request Description](https://www.pullrequest.com/blog/writing-a-great-pull-request-description/)
+
+
+### Purpose
+
+What this PR is intended to do and why this is desirable.
+
+Example: 
+
+> Adds support for AAA in BBB, as requested by several people in issue #XX.
+
+
+### Short description
+
+A short description of the chosen approach to achieve the purpose.
+
+Example:
+
+> - Added authentication option _Some authentication_ to _some module_.
+> - Added support for _Some authentication_ to _some content provider_.
+> - Added UI support for _Some authentication_ in account settings.
+
+Related information (links to Android docs and other resources that help to understand/review
+the changes) can also be put here.
+
+
+### Checklist
+
+- [ ] The PR has a proper title, description and label.
+- [ ] I have [self-reviewed the PR](https://patrickdinh.medium.com/review-your-own-pull-requests-5634cad10b7a).
+- [ ] I have added documentation to complex functions and functions that can be used by other modules.
+- [ ] I have added reasonable tests or consciously decided to not add tests.
+

.github/release.yml

@@ -0,0 +1,20 @@
+changelog:
+  exclude:
+    labels:
+      - ignore-for-release
+  categories:
+    - title: New features
+      labels:
+        - enhancement
+    - title: Bug fixes
+      labels:
+        - bug
+    - title: Refactoring
+      labels:
+        - refactoring
+    - title: Dependencies
+      labels:
+        - dependencies
+    - title: Other changes
+      labels:
+        - "*"

.github/workflows/codeql.yml

@@ -0,0 +1,58 @@
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ main-ose ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ main-ose ]
+  schedule:
+    - cron: '22 10 * * 1'
+concurrency:
+  group: codeql-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+    permissions:
+      actions: read
+      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
+      with:
+        distribution: temurin
+        java-version: 21
+    - uses: gradle/actions/setup-gradle@v3
+      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
+      with:
+        languages: ${{ matrix.language }}
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, Go, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    #- name: Autobuild
+    #  uses: github/codeql-action/autobuild@v2
+
+    - name: Build
+      run: ./gradlew --build-cache --configuration-cache --configuration-cache-problems=warn --no-daemon app:assembleOseDebug
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v3
+      with:
+        category: "/language:${{matrix.language}}"

.github/workflows/dependent-issues.yml

@@ -0,0 +1,55 @@
+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

@@ -0,0 +1,48 @@
+name: Create release
+on:
+  push:
+    tags:
+      - v*
+
+concurrency:
+  group: release-${{ github.ref }}
+  cancel-in-progress: true
+
+env:
+  prerelease: ${{ contains(github.ref_name, '-alpha') || contains(github.ref_name, '-beta') || contains(github.ref_name, '-rc') }}
+
+jobs:
+  build:
+    name: Create release
+    permissions:
+      contents: write
+      discussions: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        with:
+          distribution: temurin
+          java-version: 21
+      - uses: gradle/actions/setup-gradle@v3
+
+      - 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
+        env:
+          ANDROID_KEYSTORE: ${{ github.workspace }}/keystore.jks
+          ANDROID_KEYSTORE_PASSWORD: ${{ secrets.android_keystore_password }}
+          ANDROID_KEY_ALIAS: ${{ secrets.android_key_alias }}
+          ANDROID_KEY_PASSWORD: ${{ secrets.android_key_password }}
+
+      - name: Create Github release
+        uses: softprops/action-gh-release@v2
+        with:
+          prerelease: ${{ env.prerelease }}
+          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

@@ -0,0 +1,81 @@
+name: Development tests
+on:
+  push:
+    branches:
+      - '*'
+
+concurrency:
+  group: test-dev-${{ github.ref }}
+  cancel-in-progress: true
+
+jobs:
+  compile:
+    name: Compile for build cache
+    if: ${{ github.ref == 'refs/heads/main-ose' }}
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-java@v4
+        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
+        with:
+          cache-encryption-key: ${{ secrets.gradle_encryption_key }}
+          dependency-graph: generate-and-submit         # submit Github Dependency Graph info
+
+      - run: ./gradlew --build-cache --configuration-cache --configuration-cache-problems=warn app:compileOseDebugSource
+
+  test:
+    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
+        with:
+          distribution: temurin
+          java-version: 21
+      - uses: gradle/actions/setup-gradle@v3
+        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
+
+  test_on_emulator:
+    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
+        with:
+          distribution: temurin
+          java-version: 21
+      - uses: gradle/actions/setup-gradle@v3
+        with:
+          cache-encryption-key: ${{ secrets.gradle_encryption_key }}
+          cache-read-only: true
+
+      - name: Enable KVM group perms
+        run: |
+          echo 'KERNEL=="kvm", GROUP="kvm", MODE="0666", OPTIONS+="static_node=kvm"' | sudo tee /etc/udev/rules.d/99-kvm4all.rules
+          sudo udevadm control --reload-rules
+          sudo udevadm trigger --name-match=kvm
+
+      - name: Cache AVD
+        uses: actions/cache@v4
+        with:
+          path: ~/.config/.android/avd
+          key: avd-${{ hashFiles('app/build.gradle.kts') }}   # gradle-managed devices are defined there
+
+      - name: Run device tests
+        run: ./gradlew --build-cache --configuration-cache --configuration-cache-problems=warn app:virtualCheck

.gitignore

@@ -8,8 +8,9 @@
 # Files for the Dalvik VM
 *.dex
 
-# Java class files
+# Java/Kotlin
 *.class
+.kotlin/
 
 # Generated files
 bin/

.gitmodules

@@ -1,13 +0,0 @@
-[submodule "dav4android"]
-	path = dav4android
-	url = https://gitlab.com/bitfireAT/dav4android.git
-[submodule "ical4android"]
-	path = ical4android
-	url = https://gitlab.com/bitfireAT/ical4android.git
-[submodule "vcard4android"]
-	path = vcard4android
-	url = https://gitlab.com/bitfireAT/vcard4android.git
-[submodule "MemorizingTrustManager"]
-	path = MemorizingTrustManager
-	url = https://github.com/ge0rg/MemorizingTrustManager
-	ignore = dirty

.tx/config

@@ -0,0 +1,30 @@
+[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

@@ -0,0 +1,11 @@
+# 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.
+
+Ricki Hirner (bitfire.at)
+Bernhard Stockmann (bitfire.at)
+
+Sunik Kupfer (bitfire.at)
+Patrick Lang (techbee.at)

CONTRIBUTING.md

@@ -0,0 +1,117 @@
+
+**Thank you for your interest in contributing to DAVx⁵!**
+
+
+# Licensing
+
+All work in this repository is [licensed under the GPLv3](LICENSE).
+
+We (bitfire.at, initial and main contributors) are also asking you to give us
+permission to use your contribution for related non-open source projects
+like [Managed DAVx⁵](https://www.davx5.com/organizations/managed-davx5).
+
+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
+
+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.
+
+
+# Style guide
+
+Please adhere to the [Kotlin style guide](https://developer.android.com/kotlin/style-guide) and
+the following hints to make the source code uniform.
+
+**Have a look at similar files and copy their style if you're not certain.**
+
+Sample file (pay attention to blank lines and other formatting):
+
+```
+<Copyright header, see above>
+
+class MyClass(int arg1) : SuperClass() {
+
+    companion object {
+
+        const val CONSTANT_STRING = "Constant String";
+
+        fun staticMethod() {	// Use static methods when you don't need the object context.
+            // …
+        }
+
+    }
+
+    var someProperty: String = "12345"
+    var someRelatedProperty: Int = 12345
+
+    init {
+        // constructor
+    }
+
+
+    /**
+     * Use KDoc to document important methods. Don't use it dogmatically, but writing proper documentation
+     * (not just the method name with spaces) helps you to re-think what the method shall really do.
+     */
+    fun aFun1() {		// Group methods by some logic (for instance, the order in which they will be called)
+    }				// and alphabetically within a group.
+
+    fun anotherFun() {
+        // …
+    }
+
+
+    fun somethingCompletelyDifferent() {	// two blank lines to separate groups
+    }
+
+    fun helperForSomethingCompletelyDifferent() {
+        someCall(arg1, arg2, arg3, arg4)	// function calls: stick to one line unless it becomes confusing
+    }
+
+
+    class Model(				// two blank lines before inner classes
+        someArgument: SomeLongClass,		// arguments in multiple lines when they're too long for one line
+        anotherArgument: AnotherLongType,
+        thirdArgument: AnotherLongTypeName
+    ) : ViewModel() {
+
+        fun abc() {
+        }
+
+    }
+
+}
+```
+
+In general, use one blank line to separate things within one group of things, and two blank lines
+to separate groups. In rare cases, when methods are tightly coupled and are only helpers for another
+method, they may follow the calling method without separating blank lines.
+
+## Tests
+
+Test classes should be in the appropriate directory (see existing tests) and in the same package as the
+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

@@ -1,34 +1,46 @@
 
-DAVdroid
+[![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)
+
+![DAVx⁵ logo](app/src/main/res/mipmap-xxxhdpi/ic_launcher.png)
+
+
+DAVx⁵
 ========
 
-Please see the [DAVdroid Web site](https://davdroid.bitfire.at) for
-comprehensive information about DAVdroid.
+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.
 
-DAVdroid is licensed under the [GPLv3 License](LICENSE).
+DAVx⁵ is licensed under the [GPLv3 License](LICENSE).
 
-News and updates: [@davdroidapp](https://twitter.com/davdroidapp)
+News and updates: 
 
-Help and discussion: [DAVdroid forums](https://davdroid.bitfire.at/forums)
+* [@davx5app@fosstodon.org](https://fosstodon.org/@davx5app) on Mastodon
 
-Parts of DAVdroid have been outsourced into these libraries:
+**Help, feature requests, bug reports: [DAVx⁵ discussions](https://github.com/bitfireAT/davx5-ose/discussions)**
 
-* [dav4android](https://gitlab.com/bitfireAT/dav4android) – WebDAV/CalDav/CardDAV framework
-* [ical4android](https://gitlab.com/bitfireAT/ical4android) – iCalendar processing and Calendar Provider access
-* [vcard4android](https://gitlab.com/bitfireAT/vcard4android) – VCard processing and Contacts Provider access
+Parts of DAVx⁵ have been outsourced into these libraries:
 
-[![Flattr this!](https://api.flattr.com/button/flattr-badge-large.png)](https://flattr.com/submit/auto?user_id=bitfire&url=https://davdroid.bitfire.at&title=DAVdroid&category=software)
+* [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
+
+**If you want to support DAVx⁵, please consider [donating to DAVx⁵](https://www.davx5.com/donate)
+or [purchasing it](https://www.davx5.com/download).**
 
 
 USED THIRD-PARTY LIBRARIES
 ==========================
 
-Those libraries are used by DAVdroid (alphabetically):
+The most important libraries which are used by DAVx⁵ (alphabetically):
 
-* [dnsjava](http://www.xbill.org/dnsjava/) – [BSD License](http://www.xbill.org/dnsjava/dnsjava-current/LICENSE)
-* [ez-vcard](https://code.google.com/p/ez-vcard/) – [New BSD License](http://opensource.org/licenses/BSD-3-Clause)
-* [iCal4j](http://ical4j.sourceforge.net/) – [New BSD License](http://sourceforge.net/p/ical4j/ical4j/ci/default/tree/LICENSE)
-* [MemorizingTrustManager](https://github.com/ge0rg/MemorizingTrustManager) – [MIT License](https://raw.githubusercontent.com/ge0rg/MemorizingTrustManager/master/LICENSE.txt)
-* [okhttp](https://square.github.io/okhttp/) – [Apache License, Version 2.0](https://square.github.io/okhttp/#license)
-* [Project Lombok](http://projectlombok.org/) – [MIT License](http://opensource.org/licenses/mit-license.php)
-* [SLF4J](http://www.slf4j.org/) – [MIT License](http://www.slf4j.org/license.html)
+* [dnsjava](https://github.com/dnsjava/dnsjava) – [BSD License](https://github.com/dnsjava/dnsjava/blob/master/LICENSE)
+* [ez-vcard](https://github.com/mangstadt/ez-vcard) – [New BSD License](https://github.com/mangstadt/ez-vcard/blob/master/LICENSE)
+* [iCal4j](https://github.com/ical4j/ical4j) – [New BSD License](https://github.com/ical4j/ical4j/blob/develop/LICENSE.txt)
+* [okhttp](https://square.github.io/okhttp) – [Apache License, Version 2.0](https://square.github.io/okhttp/#license)
+
+See _About / Libraries_ in the app for all used libraries and their licenses.

SECURITY.md

@@ -0,0 +1,5 @@
+# Security Policy
+
+## Reporting a Vulnerability
+
+Please report security vulnerabilities using our [secure support form](https://www.davx5.com/support) or via email to support-en@davx5.com.

app/build.gradle

@@ -1,88 +0,0 @@
-/*
- * Copyright (c) 2013 – 2016 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
- */
-
-apply plugin: 'com.android.application'
-
-android {
-    compileSdkVersion 23
-    buildToolsVersion "23.0.3"
-
-    defaultConfig {
-        applicationId "at.bitfire.davdroid"
-        minSdkVersion 14
-        targetSdkVersion 23
-
-        versionCode 109
-
-        buildConfigField "long", "buildTime", System.currentTimeMillis() + "L"
-    }
-
-    productFlavors {
-        standard {
-            versionName "1.2"
-        }
-        gplay {
-            versionName "1.2-gplay"
-        }
-    }
-
-    buildTypes {
-        debug {
-            minifyEnabled false
-        }
-        release {
-            minifyEnabled true
-            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt'
-        }
-    }
-
-    lintOptions {
-        disable 'GoogleAppIndexingWarning'      // we don't need Google indexing, thanks
-        disable 'GradleDependency'
-        disable 'GradleDynamicVersion'
-        disable 'IconColors'
-        disable 'IconLauncherShape'
-        disable 'IconMissingDensityFolder'
-        disable 'ImpliedQuantity'
-        disable 'MissingTranslation'
-        disable 'MissingQuantity'
-        disable 'Recycle'           // doesn't understand Lombok's @Cleanup
-        disable 'RtlEnabled'
-        disable 'RtlHardcoded'
-        disable 'Typos'
-    }
-    packagingOptions {
-        exclude 'LICENSE'
-        exclude 'META-INF/LICENSE.txt'
-        exclude 'META-INF/NOTICE.txt'
-    }
-}
-
-dependencies {
-    compile project(':dav4android')
-    compile project(':ical4android')
-    compile project(':vcard4android')
-
-    compile 'com.android.support:appcompat-v7:23.+'
-    compile 'com.android.support:cardview-v7:23.+'
-    compile 'com.android.support:design:23.+'
-    compile 'com.android.support:preference-v14:23.+'
-
-    compile 'com.github.yukuku:ambilwarna:2.0.1'
-    compile project(':MemorizingTrustManager')
-
-    compile 'dnsjava:dnsjava:2.1.7'
-    compile 'org.apache.commons:commons-lang3:3.4'
-    compile 'org.apache.commons:commons-collections4:4.1'
-    provided 'org.projectlombok:lombok:1.16.8'
-
-    // for tests
-    testCompile 'junit:junit:4.12'
-    testCompile 'com.squareup.okhttp3:mockwebserver:3.3.1'
-    androidTestCompile 'com.squareup.okhttp3:mockwebserver:3.3.1'
-}

app/build.gradle.kts

@@ -0,0 +1,219 @@
+/***************************************************************************************************
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ **************************************************************************************************/
+
+plugins {
+    alias(libs.plugins.mikepenz.aboutLibraries)
+    alias(libs.plugins.android.application)
+    alias(libs.plugins.compose.compiler)
+    alias(libs.plugins.hilt)
+    alias(libs.plugins.kotlin.android)
+    alias(libs.plugins.ksp)
+}
+
+// Android configuration
+android {
+    compileSdk = 35
+
+    defaultConfig {
+        applicationId = "at.bitfire.davdroid"
+
+        versionCode = 404030200
+        versionName = "4.4.3.2"
+
+        setProperty("archivesBaseName", "davx5-ose-$versionName")
+
+        minSdk = 24        // Android 7.0
+        targetSdk = 35     // Android 15
+
+        testInstrumentationRunner = "at.bitfire.davdroid.HiltTestRunner"
+    }
+
+    java {
+        toolchain {
+            languageVersion = JavaLanguageVersion.of(21)
+        }
+    }
+
+    compileOptions {
+        // required for
+        // - dnsjava 3.x: java.nio.file.Path
+        // - ical4android: time API
+        isCoreLibraryDesugaringEnabled = true
+    }
+
+    buildFeatures {
+        buildConfig = true
+        compose = true
+    }
+
+    // Java namespace for our classes (not to be confused with Android package ID)
+    namespace = "at.bitfire.davdroid"
+
+    flavorDimensions += "distribution"
+    productFlavors {
+        create("ose") {
+            dimension = "distribution"
+            versionNameSuffix = "-ose"
+        }
+    }
+
+    sourceSets {
+        getByName("androidTest") {
+            assets.srcDir("$projectDir/schemas")
+        }
+    }
+
+    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")
+        }
+    }
+
+    buildTypes {
+        getByName("release") {
+            isMinifyEnabled = true
+            proguardFiles(getDefaultProguardFile("proguard-android-optimize.txt"), "proguard-rules-release.pro")
+
+            isShrinkResources = true
+
+            signingConfig = signingConfigs.findByName("bitfire")
+        }
+        getByName("debug") {
+            applicationIdSuffix = ".debug"
+        }
+    }
+
+    lint {
+        disable += arrayOf("GoogleAppIndexingWarning", "ImpliedQuantity", "MissingQuantity", "MissingTranslation", "ExtraTranslation", "RtlEnabled", "RtlHardcoded", "Typos", "NullSafeMutableLiveData")
+    }
+
+    packaging {
+        resources {
+            excludes += arrayOf("META-INF/*.md")
+        }
+    }
+
+    androidResources {
+        generateLocaleConfig = true
+    }
+
+    @Suppress("UnstableApiUsage")
+    testOptions {
+        managedDevices {
+            localDevices {
+                create("virtual") {
+                    device = "Pixel 3"
+                    apiLevel = 34
+                    systemImageSource = "aosp-atd"
+                }
+            }
+        }
+    }
+}
+
+ksp {
+    arg("room.schemaLocation", "$projectDir/schemas")
+}
+
+aboutLibraries {
+    excludeFields = arrayOf("generated")
+}
+
+configurations {
+    configureEach {
+        // exclude modules which are in conflict with system libraries
+        exclude(module="commons-logging")
+        exclude(group="org.json", module="json")
+
+        // Groovy requires SDK 26+, and it's not required, so exclude it
+        exclude(group="org.codehaus.groovy")
+    }
+}
+
+dependencies {
+    // core
+    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.activityCompose)
+    implementation(libs.androidx.appcompat)
+    implementation(libs.androidx.browser)
+    implementation(libs.androidx.core)
+    implementation(libs.androidx.hilt.navigation.compose)
+    implementation(libs.androidx.hilt.work)
+    implementation(libs.androidx.lifecycle.runtime.compose)
+    implementation(libs.androidx.lifecycle.viewmodel.base)
+    implementation(libs.androidx.lifecycle.viewmodel.compose)
+    implementation(libs.androidx.paging)
+    implementation(libs.androidx.paging.compose)
+    implementation(libs.androidx.preference)
+    implementation(libs.androidx.security)
+    implementation(libs.androidx.work.base)
+
+    // Jetpack Compose
+    implementation(libs.compose.accompanist.permissions)
+    implementation(platform(libs.compose.bom))
+    implementation(libs.compose.material3)
+    implementation(libs.compose.materialIconsExtended)
+    implementation(libs.compose.runtime.livedata)
+    debugImplementation(libs.compose.ui.tooling)
+    implementation(libs.compose.ui.toolingPreview)
+
+    // Glance Widgets
+    implementation(libs.glance.base)
+    implementation(libs.glance.material)
+
+    // Jetpack Room
+    implementation(libs.room.runtime)
+    implementation(libs.room.base)
+    implementation(libs.room.paging)
+    ksp(libs.room.compiler)
+
+    // own libraries
+    implementation(libs.bitfire.cert4android)
+    implementation(libs.bitfire.dav4jvm) {
+        exclude(group="junit")
+    }
+    implementation(libs.bitfire.ical4android)
+    implementation(libs.bitfire.vcard4android)
+
+    // third-party libs
+    @Suppress("RedundantSuppression")
+    implementation(libs.dnsjava)
+    implementation(libs.guava)
+    implementation(libs.mikepenz.aboutLibraries)
+    implementation(libs.nsk90.kstatemachine)
+    implementation(libs.okhttp.base)
+    implementation(libs.okhttp.brotli)
+    implementation(libs.okhttp.logging)
+    implementation(libs.openid.appauth)
+    implementation(libs.unifiedpush)
+
+    // for tests
+    androidTestImplementation(libs.androidx.arch.core.testing)
+    androidTestImplementation(libs.androidx.test.core)
+    androidTestImplementation(libs.androidx.test.junit)
+    androidTestImplementation(libs.androidx.test.rules)
+    androidTestImplementation(libs.androidx.test.runner)
+    androidTestImplementation(libs.androidx.work.testing)
+    androidTestImplementation(libs.hilt.android.testing)
+    androidTestImplementation(libs.junit)
+    androidTestImplementation(libs.mockk.android)
+    androidTestImplementation(libs.okhttp.mockwebserver)
+    androidTestImplementation(libs.room.testing)
+
+    testImplementation(libs.junit)
+    testImplementation(libs.mockk)
+    testImplementation(libs.okhttp.mockwebserver)
+}

app/proguard-rules-release.pro

@@ -0,0 +1,60 @@
+
+# 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/proguard-rules.txt

@@ -1,41 +0,0 @@
-
-# ProGuard usage for DAVdroid:
-# 	shrinking		yes (main reason for using ProGuard)
-# 	optimization		yes
-# 	obfuscation		no (DAVdroid is open-source)
-# 	preverification		no
-
--dontobfuscate
-
--optimizations !code/simplification/arithmetic,!code/simplification/cast,!field/*,!class/merging/*
--optimizationpasses 5
--allowaccessmodification
--dontpreverify
-
-# ez-vcard
--dontwarn ezvcard.io.json.**			# JSON serializer (for jCards) not used
--dontwarn freemarker.**				# freemarker templating library (for creating hCards) not used
--dontwarn org.jsoup.**				# jsoup library (for hCard parsing) not used
--dontwarn sun.misc.Perf
--keep class ezvcard.property.** { *; }		# keep all VCard properties (created at runtime)
-
-# ical4j: ignore unused dynamic libraries
--dontwarn aQute.**
--dontwarn groovy.**				# Groovy-based ContentBuilder not used
--dontwarn org.codehaus.groovy.**
--dontwarn org.apache.commons.logging.**		# Commons logging is not available
--dontwarn net.fortuna.ical4j.model.**		# ignore warnings from Groovy dependency
--keep class net.fortuna.ical4j.model.** { *; }	# keep all model classes (properties/factories, created at runtime)
-
-# okhttp
--dontwarn java.nio.file.**		# not available on Android
--dontwarn org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement
-
-# MemorizingTrustManager
--dontwarn de.duenndns.ssl.MemorizingTrustManager
-
-# dnsjava
--dontwarn sun.net.spi.nameservice.**		# not available on Android
-
-# DAVdroid + libs
--keep class at.bitfire.** { *; }	# all DAVdroid code is required

app/schemas/at.bitfire.davdroid.db.AppDatabase/10.json

@@ -0,0 +1,398 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 10,
+    "identityHash": "6fcabe50cbd00a4215dbe536a565dd2a",
+    "entities": [
+      {
+        "tableName": "service",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `accountName` TEXT NOT NULL, `type` TEXT NOT NULL, `principal` TEXT)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "accountName",
+            "columnName": "accountName",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "principal",
+            "columnName": "principal",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_service_accountName_type",
+            "unique": true,
+            "columnNames": [
+              "accountName",
+              "type"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_service_accountName_type` ON `${TABLE_NAME}` (`accountName`, `type`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "homeset",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `personal` INTEGER NOT NULL, `url` TEXT NOT NULL, `privBind` INTEGER NOT NULL, `displayName` TEXT, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "personal",
+            "columnName": "personal",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privBind",
+            "columnName": "privBind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_homeset_serviceId_url",
+            "unique": true,
+            "columnNames": [
+              "serviceId",
+              "url"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_homeset_serviceId_url` ON `${TABLE_NAME}` (`serviceId`, `url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "collection",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `homeSetId` INTEGER, `type` TEXT NOT NULL, `url` TEXT NOT NULL, `privWriteContent` INTEGER NOT NULL, `privUnbind` INTEGER NOT NULL, `forceReadOnly` INTEGER NOT NULL, `displayName` TEXT, `description` TEXT, `owner` TEXT, `color` INTEGER, `timezone` TEXT, `supportsVEVENT` INTEGER, `supportsVTODO` INTEGER, `supportsVJOURNAL` INTEGER, `source` TEXT, `sync` INTEGER NOT NULL, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE , FOREIGN KEY(`homeSetId`) REFERENCES `homeset`(`id`) ON UPDATE NO ACTION ON DELETE SET NULL )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "homeSetId",
+            "columnName": "homeSetId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privWriteContent",
+            "columnName": "privWriteContent",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privUnbind",
+            "columnName": "privUnbind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "forceReadOnly",
+            "columnName": "forceReadOnly",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "owner",
+            "columnName": "owner",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "timezone",
+            "columnName": "timezone",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVEVENT",
+            "columnName": "supportsVEVENT",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVTODO",
+            "columnName": "supportsVTODO",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVJOURNAL",
+            "columnName": "supportsVJOURNAL",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "source",
+            "columnName": "source",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "sync",
+            "columnName": "sync",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_collection_serviceId_type",
+            "unique": false,
+            "columnNames": [
+              "serviceId",
+              "type"
+            ],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_serviceId_type` ON `${TABLE_NAME}` (`serviceId`, `type`)"
+          },
+          {
+            "name": "index_collection_homeSetId_type",
+            "unique": false,
+            "columnNames": [
+              "homeSetId",
+              "type"
+            ],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_homeSetId_type` ON `${TABLE_NAME}` (`homeSetId`, `type`)"
+          },
+          {
+            "name": "index_collection_url",
+            "unique": false,
+            "columnNames": [
+              "url"
+            ],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_url` ON `${TABLE_NAME}` (`url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "homeset",
+            "onDelete": "SET NULL",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "homeSetId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "syncstats",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `collectionId` INTEGER NOT NULL, `authority` TEXT NOT NULL, `lastSync` INTEGER NOT NULL, FOREIGN KEY(`collectionId`) REFERENCES `collection`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "collectionId",
+            "columnName": "collectionId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "authority",
+            "columnName": "authority",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSync",
+            "columnName": "lastSync",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_syncstats_collectionId_authority",
+            "unique": true,
+            "columnNames": [
+              "collectionId",
+              "authority"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_syncstats_collectionId_authority` ON `${TABLE_NAME}` (`collectionId`, `authority`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "collection",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "collectionId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "webdav_mount",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `name` TEXT NOT NULL, `url` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '6fcabe50cbd00a4215dbe536a565dd2a')"
+    ]
+  }
+}

app/schemas/at.bitfire.davdroid.db.AppDatabase/11.json

@@ -0,0 +1,536 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 11,
+    "identityHash": "223aa7f0fd53730921ca212a663585d8",
+    "entities": [
+      {
+        "tableName": "service",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `accountName` TEXT NOT NULL, `type` TEXT NOT NULL, `principal` TEXT)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "accountName",
+            "columnName": "accountName",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "principal",
+            "columnName": "principal",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_service_accountName_type",
+            "unique": true,
+            "columnNames": [
+              "accountName",
+              "type"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_service_accountName_type` ON `${TABLE_NAME}` (`accountName`, `type`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "homeset",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `personal` INTEGER NOT NULL, `url` TEXT NOT NULL, `privBind` INTEGER NOT NULL, `displayName` TEXT, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "personal",
+            "columnName": "personal",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privBind",
+            "columnName": "privBind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_homeset_serviceId_url",
+            "unique": true,
+            "columnNames": [
+              "serviceId",
+              "url"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_homeset_serviceId_url` ON `${TABLE_NAME}` (`serviceId`, `url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "collection",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `homeSetId` INTEGER, `type` TEXT NOT NULL, `url` TEXT NOT NULL, `privWriteContent` INTEGER NOT NULL, `privUnbind` INTEGER NOT NULL, `forceReadOnly` INTEGER NOT NULL, `displayName` TEXT, `description` TEXT, `owner` TEXT, `color` INTEGER, `timezone` TEXT, `supportsVEVENT` INTEGER, `supportsVTODO` INTEGER, `supportsVJOURNAL` INTEGER, `source` TEXT, `sync` INTEGER NOT NULL, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE , FOREIGN KEY(`homeSetId`) REFERENCES `homeset`(`id`) ON UPDATE NO ACTION ON DELETE SET NULL )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "homeSetId",
+            "columnName": "homeSetId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privWriteContent",
+            "columnName": "privWriteContent",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privUnbind",
+            "columnName": "privUnbind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "forceReadOnly",
+            "columnName": "forceReadOnly",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "owner",
+            "columnName": "owner",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "timezone",
+            "columnName": "timezone",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVEVENT",
+            "columnName": "supportsVEVENT",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVTODO",
+            "columnName": "supportsVTODO",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVJOURNAL",
+            "columnName": "supportsVJOURNAL",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "source",
+            "columnName": "source",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "sync",
+            "columnName": "sync",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_collection_serviceId_type",
+            "unique": false,
+            "columnNames": [
+              "serviceId",
+              "type"
+            ],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_serviceId_type` ON `${TABLE_NAME}` (`serviceId`, `type`)"
+          },
+          {
+            "name": "index_collection_homeSetId_type",
+            "unique": false,
+            "columnNames": [
+              "homeSetId",
+              "type"
+            ],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_homeSetId_type` ON `${TABLE_NAME}` (`homeSetId`, `type`)"
+          },
+          {
+            "name": "index_collection_url",
+            "unique": false,
+            "columnNames": [
+              "url"
+            ],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_url` ON `${TABLE_NAME}` (`url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "homeset",
+            "onDelete": "SET NULL",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "homeSetId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "syncstats",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `collectionId` INTEGER NOT NULL, `authority` TEXT NOT NULL, `lastSync` INTEGER NOT NULL, FOREIGN KEY(`collectionId`) REFERENCES `collection`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "collectionId",
+            "columnName": "collectionId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "authority",
+            "columnName": "authority",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSync",
+            "columnName": "lastSync",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_syncstats_collectionId_authority",
+            "unique": true,
+            "columnNames": [
+              "collectionId",
+              "authority"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_syncstats_collectionId_authority` ON `${TABLE_NAME}` (`collectionId`, `authority`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "collection",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "collectionId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "webdav_document",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `mountId` INTEGER NOT NULL, `parentId` INTEGER, `name` TEXT NOT NULL, `isDirectory` INTEGER NOT NULL, `displayName` TEXT, `mimeType` TEXT, `eTag` TEXT, `lastModified` INTEGER, `size` INTEGER, `mayBind` INTEGER, `mayUnbind` INTEGER, `mayWriteContent` INTEGER, `quotaAvailable` INTEGER, `quotaUsed` INTEGER, FOREIGN KEY(`mountId`) REFERENCES `webdav_mount`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE , FOREIGN KEY(`parentId`) REFERENCES `webdav_document`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "mountId",
+            "columnName": "mountId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "parentId",
+            "columnName": "parentId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isDirectory",
+            "columnName": "isDirectory",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mimeType",
+            "columnName": "mimeType",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "eTag",
+            "columnName": "eTag",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "lastModified",
+            "columnName": "lastModified",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "size",
+            "columnName": "size",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mayBind",
+            "columnName": "mayBind",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mayUnbind",
+            "columnName": "mayUnbind",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mayWriteContent",
+            "columnName": "mayWriteContent",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "quotaAvailable",
+            "columnName": "quotaAvailable",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "quotaUsed",
+            "columnName": "quotaUsed",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_webdav_document_mountId_parentId_name",
+            "unique": true,
+            "columnNames": [
+              "mountId",
+              "parentId",
+              "name"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_webdav_document_mountId_parentId_name` ON `${TABLE_NAME}` (`mountId`, `parentId`, `name`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "webdav_mount",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "mountId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "webdav_document",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "parentId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "webdav_mount",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `name` TEXT NOT NULL, `url` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '223aa7f0fd53730921ca212a663585d8')"
+    ]
+  }
+}

app/schemas/at.bitfire.davdroid.db.AppDatabase/12.json

@@ -0,0 +1,615 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 12,
+    "identityHash": "67fafceecee2d97cac6a62d46fa2c3e2",
+    "entities": [
+      {
+        "tableName": "service",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `accountName` TEXT NOT NULL, `type` TEXT NOT NULL, `principal` TEXT)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "accountName",
+            "columnName": "accountName",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "principal",
+            "columnName": "principal",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_service_accountName_type",
+            "unique": true,
+            "columnNames": [
+              "accountName",
+              "type"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_service_accountName_type` ON `${TABLE_NAME}` (`accountName`, `type`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "homeset",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `personal` INTEGER NOT NULL, `url` TEXT NOT NULL, `privBind` INTEGER NOT NULL, `displayName` TEXT, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "personal",
+            "columnName": "personal",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privBind",
+            "columnName": "privBind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_homeset_serviceId_url",
+            "unique": true,
+            "columnNames": [
+              "serviceId",
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_homeset_serviceId_url` ON `${TABLE_NAME}` (`serviceId`, `url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "collection",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `homeSetId` INTEGER, `ownerId` INTEGER, `type` TEXT NOT NULL, `url` TEXT NOT NULL, `privWriteContent` INTEGER NOT NULL, `privUnbind` INTEGER NOT NULL, `forceReadOnly` INTEGER NOT NULL, `displayName` TEXT, `description` TEXT, `color` INTEGER, `timezone` TEXT, `supportsVEVENT` INTEGER, `supportsVTODO` INTEGER, `supportsVJOURNAL` INTEGER, `source` TEXT, `sync` INTEGER NOT NULL, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE , FOREIGN KEY(`homeSetId`) REFERENCES `homeset`(`id`) ON UPDATE NO ACTION ON DELETE SET NULL , FOREIGN KEY(`ownerId`) REFERENCES `principal`(`id`) ON UPDATE NO ACTION ON DELETE SET NULL )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "homeSetId",
+            "columnName": "homeSetId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "ownerId",
+            "columnName": "ownerId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privWriteContent",
+            "columnName": "privWriteContent",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privUnbind",
+            "columnName": "privUnbind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "forceReadOnly",
+            "columnName": "forceReadOnly",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "timezone",
+            "columnName": "timezone",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVEVENT",
+            "columnName": "supportsVEVENT",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVTODO",
+            "columnName": "supportsVTODO",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVJOURNAL",
+            "columnName": "supportsVJOURNAL",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "source",
+            "columnName": "source",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "sync",
+            "columnName": "sync",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_collection_serviceId_type",
+            "unique": false,
+            "columnNames": [
+              "serviceId",
+              "type"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_serviceId_type` ON `${TABLE_NAME}` (`serviceId`, `type`)"
+          },
+          {
+            "name": "index_collection_homeSetId_type",
+            "unique": false,
+            "columnNames": [
+              "homeSetId",
+              "type"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_homeSetId_type` ON `${TABLE_NAME}` (`homeSetId`, `type`)"
+          },
+          {
+            "name": "index_collection_url",
+            "unique": false,
+            "columnNames": [
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_url` ON `${TABLE_NAME}` (`url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "homeset",
+            "onDelete": "SET NULL",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "homeSetId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "principal",
+            "onDelete": "SET NULL",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "ownerId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "principal",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `url` TEXT NOT NULL, `displayName` TEXT, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_principal_serviceId_url",
+            "unique": true,
+            "columnNames": [
+              "serviceId",
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_principal_serviceId_url` ON `${TABLE_NAME}` (`serviceId`, `url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "syncstats",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `collectionId` INTEGER NOT NULL, `authority` TEXT NOT NULL, `lastSync` INTEGER NOT NULL, FOREIGN KEY(`collectionId`) REFERENCES `collection`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "collectionId",
+            "columnName": "collectionId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "authority",
+            "columnName": "authority",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSync",
+            "columnName": "lastSync",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_syncstats_collectionId_authority",
+            "unique": true,
+            "columnNames": [
+              "collectionId",
+              "authority"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_syncstats_collectionId_authority` ON `${TABLE_NAME}` (`collectionId`, `authority`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "collection",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "collectionId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "webdav_document",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `mountId` INTEGER NOT NULL, `parentId` INTEGER, `name` TEXT NOT NULL, `isDirectory` INTEGER NOT NULL, `displayName` TEXT, `mimeType` TEXT, `eTag` TEXT, `lastModified` INTEGER, `size` INTEGER, `mayBind` INTEGER, `mayUnbind` INTEGER, `mayWriteContent` INTEGER, `quotaAvailable` INTEGER, `quotaUsed` INTEGER, FOREIGN KEY(`mountId`) REFERENCES `webdav_mount`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE , FOREIGN KEY(`parentId`) REFERENCES `webdav_document`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "mountId",
+            "columnName": "mountId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "parentId",
+            "columnName": "parentId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isDirectory",
+            "columnName": "isDirectory",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mimeType",
+            "columnName": "mimeType",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "eTag",
+            "columnName": "eTag",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "lastModified",
+            "columnName": "lastModified",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "size",
+            "columnName": "size",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mayBind",
+            "columnName": "mayBind",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mayUnbind",
+            "columnName": "mayUnbind",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mayWriteContent",
+            "columnName": "mayWriteContent",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "quotaAvailable",
+            "columnName": "quotaAvailable",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "quotaUsed",
+            "columnName": "quotaUsed",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_webdav_document_mountId_parentId_name",
+            "unique": true,
+            "columnNames": [
+              "mountId",
+              "parentId",
+              "name"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_webdav_document_mountId_parentId_name` ON `${TABLE_NAME}` (`mountId`, `parentId`, `name`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "webdav_mount",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "mountId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "webdav_document",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "parentId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "webdav_mount",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `name` TEXT NOT NULL, `url` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '67fafceecee2d97cac6a62d46fa2c3e2')"
+    ]
+  }
+}

app/schemas/at.bitfire.davdroid.db.AppDatabase/13.json

@@ -0,0 +1,640 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 13,
+    "identityHash": "0a6a9705ff471acd766ab96e3edf8ac3",
+    "entities": [
+      {
+        "tableName": "service",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `accountName` TEXT NOT NULL, `type` TEXT NOT NULL, `principal` TEXT)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "accountName",
+            "columnName": "accountName",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "principal",
+            "columnName": "principal",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_service_accountName_type",
+            "unique": true,
+            "columnNames": [
+              "accountName",
+              "type"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_service_accountName_type` ON `${TABLE_NAME}` (`accountName`, `type`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "homeset",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `personal` INTEGER NOT NULL, `url` TEXT NOT NULL, `privBind` INTEGER NOT NULL, `displayName` TEXT, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "personal",
+            "columnName": "personal",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privBind",
+            "columnName": "privBind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_homeset_serviceId_url",
+            "unique": true,
+            "columnNames": [
+              "serviceId",
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_homeset_serviceId_url` ON `${TABLE_NAME}` (`serviceId`, `url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "collection",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `homeSetId` INTEGER, `ownerId` INTEGER, `type` TEXT NOT NULL, `url` TEXT NOT NULL, `privWriteContent` INTEGER NOT NULL, `privUnbind` INTEGER NOT NULL, `forceReadOnly` INTEGER NOT NULL, `displayName` TEXT, `description` TEXT, `color` INTEGER, `timezone` TEXT, `supportsVEVENT` INTEGER, `supportsVTODO` INTEGER, `supportsVJOURNAL` INTEGER, `source` TEXT, `sync` INTEGER NOT NULL, `pushTopic` TEXT, `supportsWebPush` INTEGER NOT NULL DEFAULT 0, `pushSubscription` TEXT, `pushSubscriptionCreated` INTEGER, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE , FOREIGN KEY(`homeSetId`) REFERENCES `homeset`(`id`) ON UPDATE NO ACTION ON DELETE SET NULL , FOREIGN KEY(`ownerId`) REFERENCES `principal`(`id`) ON UPDATE NO ACTION ON DELETE SET NULL )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "homeSetId",
+            "columnName": "homeSetId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "ownerId",
+            "columnName": "ownerId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privWriteContent",
+            "columnName": "privWriteContent",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privUnbind",
+            "columnName": "privUnbind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "forceReadOnly",
+            "columnName": "forceReadOnly",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "timezone",
+            "columnName": "timezone",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVEVENT",
+            "columnName": "supportsVEVENT",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVTODO",
+            "columnName": "supportsVTODO",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVJOURNAL",
+            "columnName": "supportsVJOURNAL",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "source",
+            "columnName": "source",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "sync",
+            "columnName": "sync",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "pushTopic",
+            "columnName": "pushTopic",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsWebPush",
+            "columnName": "supportsWebPush",
+            "affinity": "INTEGER",
+            "notNull": true,
+            "defaultValue": "0"
+          },
+          {
+            "fieldPath": "pushSubscription",
+            "columnName": "pushSubscription",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "pushSubscriptionCreated",
+            "columnName": "pushSubscriptionCreated",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_collection_serviceId_type",
+            "unique": false,
+            "columnNames": [
+              "serviceId",
+              "type"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_serviceId_type` ON `${TABLE_NAME}` (`serviceId`, `type`)"
+          },
+          {
+            "name": "index_collection_homeSetId_type",
+            "unique": false,
+            "columnNames": [
+              "homeSetId",
+              "type"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_homeSetId_type` ON `${TABLE_NAME}` (`homeSetId`, `type`)"
+          },
+          {
+            "name": "index_collection_url",
+            "unique": false,
+            "columnNames": [
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_url` ON `${TABLE_NAME}` (`url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "homeset",
+            "onDelete": "SET NULL",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "homeSetId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "principal",
+            "onDelete": "SET NULL",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "ownerId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "principal",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `url` TEXT NOT NULL, `displayName` TEXT, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_principal_serviceId_url",
+            "unique": true,
+            "columnNames": [
+              "serviceId",
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_principal_serviceId_url` ON `${TABLE_NAME}` (`serviceId`, `url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "syncstats",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `collectionId` INTEGER NOT NULL, `authority` TEXT NOT NULL, `lastSync` INTEGER NOT NULL, FOREIGN KEY(`collectionId`) REFERENCES `collection`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "collectionId",
+            "columnName": "collectionId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "authority",
+            "columnName": "authority",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSync",
+            "columnName": "lastSync",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_syncstats_collectionId_authority",
+            "unique": true,
+            "columnNames": [
+              "collectionId",
+              "authority"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_syncstats_collectionId_authority` ON `${TABLE_NAME}` (`collectionId`, `authority`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "collection",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "collectionId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "webdav_document",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `mountId` INTEGER NOT NULL, `parentId` INTEGER, `name` TEXT NOT NULL, `isDirectory` INTEGER NOT NULL, `displayName` TEXT, `mimeType` TEXT, `eTag` TEXT, `lastModified` INTEGER, `size` INTEGER, `mayBind` INTEGER, `mayUnbind` INTEGER, `mayWriteContent` INTEGER, `quotaAvailable` INTEGER, `quotaUsed` INTEGER, FOREIGN KEY(`mountId`) REFERENCES `webdav_mount`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE , FOREIGN KEY(`parentId`) REFERENCES `webdav_document`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "mountId",
+            "columnName": "mountId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "parentId",
+            "columnName": "parentId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isDirectory",
+            "columnName": "isDirectory",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mimeType",
+            "columnName": "mimeType",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "eTag",
+            "columnName": "eTag",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "lastModified",
+            "columnName": "lastModified",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "size",
+            "columnName": "size",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mayBind",
+            "columnName": "mayBind",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mayUnbind",
+            "columnName": "mayUnbind",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mayWriteContent",
+            "columnName": "mayWriteContent",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "quotaAvailable",
+            "columnName": "quotaAvailable",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "quotaUsed",
+            "columnName": "quotaUsed",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_webdav_document_mountId_parentId_name",
+            "unique": true,
+            "columnNames": [
+              "mountId",
+              "parentId",
+              "name"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_webdav_document_mountId_parentId_name` ON `${TABLE_NAME}` (`mountId`, `parentId`, `name`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "webdav_mount",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "mountId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "webdav_document",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "parentId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "webdav_mount",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `name` TEXT NOT NULL, `url` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '0a6a9705ff471acd766ab96e3edf8ac3')"
+    ]
+  }
+}

app/schemas/at.bitfire.davdroid.db.AppDatabase/14.json

@@ -0,0 +1,669 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 14,
+    "identityHash": "9a0eb47f27473eab254db568081a4585",
+    "entities": [
+      {
+        "tableName": "service",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `accountName` TEXT NOT NULL, `type` TEXT NOT NULL, `principal` TEXT)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "accountName",
+            "columnName": "accountName",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "principal",
+            "columnName": "principal",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_service_accountName_type",
+            "unique": true,
+            "columnNames": [
+              "accountName",
+              "type"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_service_accountName_type` ON `${TABLE_NAME}` (`accountName`, `type`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "homeset",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `personal` INTEGER NOT NULL, `url` TEXT NOT NULL, `privBind` INTEGER NOT NULL, `displayName` TEXT, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "personal",
+            "columnName": "personal",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privBind",
+            "columnName": "privBind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_homeset_serviceId_url",
+            "unique": true,
+            "columnNames": [
+              "serviceId",
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_homeset_serviceId_url` ON `${TABLE_NAME}` (`serviceId`, `url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "collection",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `homeSetId` INTEGER, `ownerId` INTEGER, `type` TEXT NOT NULL, `url` TEXT NOT NULL, `privWriteContent` INTEGER NOT NULL, `privUnbind` INTEGER NOT NULL, `forceReadOnly` INTEGER NOT NULL, `displayName` TEXT, `description` TEXT, `color` INTEGER, `timezone` TEXT, `supportsVEVENT` INTEGER, `supportsVTODO` INTEGER, `supportsVJOURNAL` INTEGER, `source` TEXT, `sync` INTEGER NOT NULL, `pushTopic` TEXT, `supportsWebPush` INTEGER NOT NULL DEFAULT 0, `pushSubscription` TEXT, `pushSubscriptionCreated` INTEGER, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE , FOREIGN KEY(`homeSetId`) REFERENCES `homeset`(`id`) ON UPDATE NO ACTION ON DELETE SET NULL , FOREIGN KEY(`ownerId`) REFERENCES `principal`(`id`) ON UPDATE NO ACTION ON DELETE SET NULL )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "homeSetId",
+            "columnName": "homeSetId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "ownerId",
+            "columnName": "ownerId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privWriteContent",
+            "columnName": "privWriteContent",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privUnbind",
+            "columnName": "privUnbind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "forceReadOnly",
+            "columnName": "forceReadOnly",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "timezone",
+            "columnName": "timezone",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVEVENT",
+            "columnName": "supportsVEVENT",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVTODO",
+            "columnName": "supportsVTODO",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVJOURNAL",
+            "columnName": "supportsVJOURNAL",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "source",
+            "columnName": "source",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "sync",
+            "columnName": "sync",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "pushTopic",
+            "columnName": "pushTopic",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsWebPush",
+            "columnName": "supportsWebPush",
+            "affinity": "INTEGER",
+            "notNull": true,
+            "defaultValue": "0"
+          },
+          {
+            "fieldPath": "pushSubscription",
+            "columnName": "pushSubscription",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "pushSubscriptionCreated",
+            "columnName": "pushSubscriptionCreated",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_collection_serviceId_type",
+            "unique": false,
+            "columnNames": [
+              "serviceId",
+              "type"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_serviceId_type` ON `${TABLE_NAME}` (`serviceId`, `type`)"
+          },
+          {
+            "name": "index_collection_homeSetId_type",
+            "unique": false,
+            "columnNames": [
+              "homeSetId",
+              "type"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_homeSetId_type` ON `${TABLE_NAME}` (`homeSetId`, `type`)"
+          },
+          {
+            "name": "index_collection_ownerId_type",
+            "unique": false,
+            "columnNames": [
+              "ownerId",
+              "type"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_ownerId_type` ON `${TABLE_NAME}` (`ownerId`, `type`)"
+          },
+          {
+            "name": "index_collection_pushTopic_type",
+            "unique": false,
+            "columnNames": [
+              "pushTopic",
+              "type"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_pushTopic_type` ON `${TABLE_NAME}` (`pushTopic`, `type`)"
+          },
+          {
+            "name": "index_collection_url",
+            "unique": false,
+            "columnNames": [
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_url` ON `${TABLE_NAME}` (`url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "homeset",
+            "onDelete": "SET NULL",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "homeSetId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "principal",
+            "onDelete": "SET NULL",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "ownerId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "principal",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `url` TEXT NOT NULL, `displayName` TEXT, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_principal_serviceId_url",
+            "unique": true,
+            "columnNames": [
+              "serviceId",
+              "url"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_principal_serviceId_url` ON `${TABLE_NAME}` (`serviceId`, `url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "syncstats",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `collectionId` INTEGER NOT NULL, `authority` TEXT NOT NULL, `lastSync` INTEGER NOT NULL, FOREIGN KEY(`collectionId`) REFERENCES `collection`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "collectionId",
+            "columnName": "collectionId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "authority",
+            "columnName": "authority",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSync",
+            "columnName": "lastSync",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_syncstats_collectionId_authority",
+            "unique": true,
+            "columnNames": [
+              "collectionId",
+              "authority"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_syncstats_collectionId_authority` ON `${TABLE_NAME}` (`collectionId`, `authority`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "collection",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "collectionId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "webdav_document",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `mountId` INTEGER NOT NULL, `parentId` INTEGER, `name` TEXT NOT NULL, `isDirectory` INTEGER NOT NULL, `displayName` TEXT, `mimeType` TEXT, `eTag` TEXT, `lastModified` INTEGER, `size` INTEGER, `mayBind` INTEGER, `mayUnbind` INTEGER, `mayWriteContent` INTEGER, `quotaAvailable` INTEGER, `quotaUsed` INTEGER, FOREIGN KEY(`mountId`) REFERENCES `webdav_mount`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE , FOREIGN KEY(`parentId`) REFERENCES `webdav_document`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "mountId",
+            "columnName": "mountId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "parentId",
+            "columnName": "parentId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "isDirectory",
+            "columnName": "isDirectory",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mimeType",
+            "columnName": "mimeType",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "eTag",
+            "columnName": "eTag",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "lastModified",
+            "columnName": "lastModified",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "size",
+            "columnName": "size",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mayBind",
+            "columnName": "mayBind",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mayUnbind",
+            "columnName": "mayUnbind",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "mayWriteContent",
+            "columnName": "mayWriteContent",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "quotaAvailable",
+            "columnName": "quotaAvailable",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "quotaUsed",
+            "columnName": "quotaUsed",
+            "affinity": "INTEGER",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [
+          {
+            "name": "index_webdav_document_mountId_parentId_name",
+            "unique": true,
+            "columnNames": [
+              "mountId",
+              "parentId",
+              "name"
+            ],
+            "orders": [],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_webdav_document_mountId_parentId_name` ON `${TABLE_NAME}` (`mountId`, `parentId`, `name`)"
+          },
+          {
+            "name": "index_webdav_document_parentId",
+            "unique": false,
+            "columnNames": [
+              "parentId"
+            ],
+            "orders": [],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_webdav_document_parentId` ON `${TABLE_NAME}` (`parentId`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "webdav_mount",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "mountId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "webdav_document",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "parentId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "webdav_mount",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `name` TEXT NOT NULL, `url` TEXT NOT NULL)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "name",
+            "columnName": "name",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "autoGenerate": true,
+          "columnNames": [
+            "id"
+          ]
+        },
+        "indices": [],
+        "foreignKeys": []
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '9a0eb47f27473eab254db568081a4585')"
+    ]
+  }
+}

app/schemas/at.bitfire.davdroid.db.AppDatabase/8.json

@@ -0,0 +1,298 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 8,
+    "identityHash": "b8699ef3cc4c62e8851df4360fb69e00",
+    "entities": [
+      {
+        "tableName": "service",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `accountName` TEXT NOT NULL, `type` TEXT NOT NULL, `principal` TEXT)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "accountName",
+            "columnName": "accountName",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "principal",
+            "columnName": "principal",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_service_accountName_type",
+            "unique": true,
+            "columnNames": [
+              "accountName",
+              "type"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_service_accountName_type` ON `${TABLE_NAME}` (`accountName`, `type`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "homeset",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `personal` INTEGER NOT NULL, `url` TEXT NOT NULL, `privBind` INTEGER NOT NULL, `displayName` TEXT, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "personal",
+            "columnName": "personal",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privBind",
+            "columnName": "privBind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_homeset_serviceId_url",
+            "unique": true,
+            "columnNames": [
+              "serviceId",
+              "url"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_homeset_serviceId_url` ON `${TABLE_NAME}` (`serviceId`, `url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "collection",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `homeSetId` INTEGER, `type` TEXT NOT NULL, `url` TEXT NOT NULL, `privWriteContent` INTEGER NOT NULL, `privUnbind` INTEGER NOT NULL, `forceReadOnly` INTEGER NOT NULL, `displayName` TEXT, `description` TEXT, `owner` TEXT, `color` INTEGER, `timezone` TEXT, `supportsVEVENT` INTEGER, `supportsVTODO` INTEGER, `supportsVJOURNAL` INTEGER, `source` TEXT, `sync` INTEGER NOT NULL, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE , FOREIGN KEY(`homeSetId`) REFERENCES `homeset`(`id`) ON UPDATE NO ACTION ON DELETE SET NULL )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "homeSetId",
+            "columnName": "homeSetId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privWriteContent",
+            "columnName": "privWriteContent",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privUnbind",
+            "columnName": "privUnbind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "forceReadOnly",
+            "columnName": "forceReadOnly",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "owner",
+            "columnName": "owner",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "timezone",
+            "columnName": "timezone",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVEVENT",
+            "columnName": "supportsVEVENT",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVTODO",
+            "columnName": "supportsVTODO",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVJOURNAL",
+            "columnName": "supportsVJOURNAL",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "source",
+            "columnName": "source",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "sync",
+            "columnName": "sync",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_collection_serviceId_type",
+            "unique": false,
+            "columnNames": [
+              "serviceId",
+              "type"
+            ],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_serviceId_type` ON `${TABLE_NAME}` (`serviceId`, `type`)"
+          },
+          {
+            "name": "index_collection_homeSetId_type",
+            "unique": false,
+            "columnNames": [
+              "homeSetId",
+              "type"
+            ],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_homeSetId_type` ON `${TABLE_NAME}` (`homeSetId`, `type`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "homeset",
+            "onDelete": "SET NULL",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "homeSetId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, 'b8699ef3cc4c62e8851df4360fb69e00')"
+    ]
+  }
+}

app/schemas/at.bitfire.davdroid.db.AppDatabase/9.json

@@ -0,0 +1,366 @@
+{
+  "formatVersion": 1,
+  "database": {
+    "version": 9,
+    "identityHash": "7e4bfdf7f9fa3529c333cf9485f8cf50",
+    "entities": [
+      {
+        "tableName": "service",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `accountName` TEXT NOT NULL, `type` TEXT NOT NULL, `principal` TEXT)",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "accountName",
+            "columnName": "accountName",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "principal",
+            "columnName": "principal",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_service_accountName_type",
+            "unique": true,
+            "columnNames": [
+              "accountName",
+              "type"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_service_accountName_type` ON `${TABLE_NAME}` (`accountName`, `type`)"
+          }
+        ],
+        "foreignKeys": []
+      },
+      {
+        "tableName": "homeset",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `personal` INTEGER NOT NULL, `url` TEXT NOT NULL, `privBind` INTEGER NOT NULL, `displayName` TEXT, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "personal",
+            "columnName": "personal",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privBind",
+            "columnName": "privBind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_homeset_serviceId_url",
+            "unique": true,
+            "columnNames": [
+              "serviceId",
+              "url"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_homeset_serviceId_url` ON `${TABLE_NAME}` (`serviceId`, `url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "collection",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `serviceId` INTEGER NOT NULL, `homeSetId` INTEGER, `type` TEXT NOT NULL, `url` TEXT NOT NULL, `privWriteContent` INTEGER NOT NULL, `privUnbind` INTEGER NOT NULL, `forceReadOnly` INTEGER NOT NULL, `displayName` TEXT, `description` TEXT, `owner` TEXT, `color` INTEGER, `timezone` TEXT, `supportsVEVENT` INTEGER, `supportsVTODO` INTEGER, `supportsVJOURNAL` INTEGER, `source` TEXT, `sync` INTEGER NOT NULL, FOREIGN KEY(`serviceId`) REFERENCES `service`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE , FOREIGN KEY(`homeSetId`) REFERENCES `homeset`(`id`) ON UPDATE NO ACTION ON DELETE SET NULL )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "serviceId",
+            "columnName": "serviceId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "homeSetId",
+            "columnName": "homeSetId",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "type",
+            "columnName": "type",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "url",
+            "columnName": "url",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privWriteContent",
+            "columnName": "privWriteContent",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "privUnbind",
+            "columnName": "privUnbind",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "forceReadOnly",
+            "columnName": "forceReadOnly",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "displayName",
+            "columnName": "displayName",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "description",
+            "columnName": "description",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "owner",
+            "columnName": "owner",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "color",
+            "columnName": "color",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "timezone",
+            "columnName": "timezone",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVEVENT",
+            "columnName": "supportsVEVENT",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVTODO",
+            "columnName": "supportsVTODO",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "supportsVJOURNAL",
+            "columnName": "supportsVJOURNAL",
+            "affinity": "INTEGER",
+            "notNull": false
+          },
+          {
+            "fieldPath": "source",
+            "columnName": "source",
+            "affinity": "TEXT",
+            "notNull": false
+          },
+          {
+            "fieldPath": "sync",
+            "columnName": "sync",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_collection_serviceId_type",
+            "unique": false,
+            "columnNames": [
+              "serviceId",
+              "type"
+            ],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_serviceId_type` ON `${TABLE_NAME}` (`serviceId`, `type`)"
+          },
+          {
+            "name": "index_collection_homeSetId_type",
+            "unique": false,
+            "columnNames": [
+              "homeSetId",
+              "type"
+            ],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_homeSetId_type` ON `${TABLE_NAME}` (`homeSetId`, `type`)"
+          },
+          {
+            "name": "index_collection_url",
+            "unique": false,
+            "columnNames": [
+              "url"
+            ],
+            "createSql": "CREATE INDEX IF NOT EXISTS `index_collection_url` ON `${TABLE_NAME}` (`url`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "service",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "serviceId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          },
+          {
+            "table": "homeset",
+            "onDelete": "SET NULL",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "homeSetId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      },
+      {
+        "tableName": "syncstats",
+        "createSql": "CREATE TABLE IF NOT EXISTS `${TABLE_NAME}` (`id` INTEGER PRIMARY KEY AUTOINCREMENT NOT NULL, `collectionId` INTEGER NOT NULL, `authority` TEXT NOT NULL, `lastSync` INTEGER NOT NULL, FOREIGN KEY(`collectionId`) REFERENCES `collection`(`id`) ON UPDATE NO ACTION ON DELETE CASCADE )",
+        "fields": [
+          {
+            "fieldPath": "id",
+            "columnName": "id",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "collectionId",
+            "columnName": "collectionId",
+            "affinity": "INTEGER",
+            "notNull": true
+          },
+          {
+            "fieldPath": "authority",
+            "columnName": "authority",
+            "affinity": "TEXT",
+            "notNull": true
+          },
+          {
+            "fieldPath": "lastSync",
+            "columnName": "lastSync",
+            "affinity": "INTEGER",
+            "notNull": true
+          }
+        ],
+        "primaryKey": {
+          "columnNames": [
+            "id"
+          ],
+          "autoGenerate": true
+        },
+        "indices": [
+          {
+            "name": "index_syncstats_collectionId_authority",
+            "unique": true,
+            "columnNames": [
+              "collectionId",
+              "authority"
+            ],
+            "createSql": "CREATE UNIQUE INDEX IF NOT EXISTS `index_syncstats_collectionId_authority` ON `${TABLE_NAME}` (`collectionId`, `authority`)"
+          }
+        ],
+        "foreignKeys": [
+          {
+            "table": "collection",
+            "onDelete": "CASCADE",
+            "onUpdate": "NO ACTION",
+            "columns": [
+              "collectionId"
+            ],
+            "referencedColumns": [
+              "id"
+            ]
+          }
+        ]
+      }
+    ],
+    "views": [],
+    "setupQueries": [
+      "CREATE TABLE IF NOT EXISTS room_master_table (id INTEGER PRIMARY KEY,identity_hash TEXT)",
+      "INSERT OR REPLACE INTO room_master_table (id,identity_hash) VALUES(42, '7e4bfdf7f9fa3529c333cf9485f8cf50')"
+    ]
+  }
+}

app/src/.gitignore

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

app/src/androidTest/AndroidManifest.xml

@@ -0,0 +1,27 @@
+<?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/java/at/bitfire/davdroid/SSLSocketFactoryCompatTest.java

@@ -1,53 +0,0 @@
-/*
- * Copyright © 2013 – 2015 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
- */
-
-package at.bitfire.davdroid;
-
-import android.os.Build;
-import android.test.InstrumentationTestCase;
-
-import java.io.IOException;
-import java.net.Socket;
-
-import javax.net.ssl.SSLSocket;
-
-import de.duenndns.ssl.MemorizingTrustManager;
-import okhttp3.mockwebserver.MockWebServer;
-
-public class SSLSocketFactoryCompatTest extends InstrumentationTestCase {
-
-    SSLSocketFactoryCompat factory;
-    MockWebServer server = new MockWebServer();
-
-    @Override
-    protected void setUp() throws Exception {
-        factory = new SSLSocketFactoryCompat(new MemorizingTrustManager(getInstrumentation().getTargetContext().getApplicationContext()));
-        server.start();
-    }
-
-    @Override
-    protected void tearDown() throws Exception {
-        server.shutdown();
-    }
-
-
-    public void testUpgradeTLS() throws IOException {
-        Socket s = factory.createSocket(server.getHostName(), server.getPort());
-        assertTrue(s instanceof SSLSocket);
-
-        SSLSocket ssl = (SSLSocket)s;
-        assertFalse(org.apache.commons.lang3.ArrayUtils.contains(ssl.getEnabledProtocols(), "SSLv3"));
-        assertTrue(org.apache.commons.lang3.ArrayUtils.contains(ssl.getEnabledProtocols(), "TLSv1"));
-
-        if (Build.VERSION.SDK_INT >= 16) {
-            assertTrue(org.apache.commons.lang3.ArrayUtils.contains(ssl.getEnabledProtocols(), "TLSv1.1"));
-            assertTrue(org.apache.commons.lang3.ArrayUtils.contains(ssl.getEnabledProtocols(), "TLSv1.2"));
-        }
-    }
-
-}

app/src/androidTest/java/at/bitfire/davdroid/model/CollectionInfoTest.java

@@ -1,110 +0,0 @@
-/*
- * Copyright © 2013 – 2016 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
- */
-
-package at.bitfire.davdroid.model;
-
-import android.content.ContentValues;
-
-import junit.framework.TestCase;
-
-import java.io.IOException;
-
-import at.bitfire.dav4android.DavResource;
-import at.bitfire.dav4android.exception.DavException;
-import at.bitfire.dav4android.exception.HttpException;
-import at.bitfire.dav4android.property.ResourceType;
-import at.bitfire.davdroid.HttpClient;
-import at.bitfire.davdroid.model.ServiceDB.Collections;
-import okhttp3.mockwebserver.MockResponse;
-import okhttp3.mockwebserver.MockWebServer;
-
-public class CollectionInfoTest extends TestCase {
-
-    MockWebServer server = new MockWebServer();
-
-    public void testFromDavResource() throws IOException, HttpException, DavException {
-        // r/w address book
-        server.enqueue(new 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>"));
-
-        DavResource dav = new DavResource(HttpClient.create(), server.url("/"));
-        dav.propfind(0, ResourceType.NAME);
-        CollectionInfo info = CollectionInfo.fromDavResource(dav);
-        assertEquals(CollectionInfo.Type.ADDRESS_BOOK, info.type);
-        assertFalse(info.readOnly);
-        assertEquals("My Contacts", info.displayName);
-        assertEquals("My Contacts Description", info.description);
-
-        // read-only calendar, no display name
-        server.enqueue(new 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>"));
-
-        dav = new DavResource(HttpClient.create(), server.url("/"));
-        dav.propfind(0, ResourceType.NAME);
-        info = CollectionInfo.fromDavResource(dav);
-        assertEquals(CollectionInfo.Type.CALENDAR, info.type);
-        assertTrue(info.readOnly);
-        assertNull(info.displayName);
-        assertEquals("My Calendar", info.description);
-        assertEquals(0xFFFF0000, (int)info.color);
-        assertEquals("tzdata", info.timeZone);
-        assertTrue(info.supportsVEVENT);
-        assertTrue(info.supportsVTODO);
-    }
-
-    public void testFromDB() {
-        ContentValues values = new ContentValues();
-        values.put(Collections.ID, 1);
-        values.put(Collections.SERVICE_ID, 1);
-        values.put(Collections.URL, "http://example.com");
-        values.put(Collections.READ_ONLY, 1);
-        values.put(Collections.DISPLAY_NAME, "display name");
-        values.put(Collections.DESCRIPTION, "description");
-        values.put(Collections.COLOR, 0xFFFF0000);
-        values.put(Collections.TIME_ZONE, "tzdata");
-        values.put(Collections.SUPPORTS_VEVENT, 1);
-        values.put(Collections.SUPPORTS_VTODO, 1);
-        values.put(Collections.SYNC, 1);
-
-        CollectionInfo info = CollectionInfo.fromDB(values);
-        assertEquals(1, info.id);
-        assertEquals(1, (long)info.serviceID);
-        assertEquals("http://example.com", info.url);
-        assertTrue(info.readOnly);
-        assertEquals("display name", info.displayName);
-        assertEquals("description", info.description);
-        assertEquals(0xFFFF0000, (int)info.color);
-        assertEquals("tzdata", info.timeZone);
-        assertTrue(info.supportsVEVENT);
-        assertTrue(info.supportsVTODO);
-        assertTrue(info.selected);
-    }
-
-}

app/src/androidTest/java/at/bitfire/davdroid/ui/setup/DavResourceFinderTest.java

@@ -1,189 +0,0 @@
-/*
- * Copyright © 2013 – 2016 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
- */
-
-package at.bitfire.davdroid.ui.setup;
-
-import android.test.InstrumentationTestCase;
-
-import java.io.IOException;
-import java.net.URI;
-
-import at.bitfire.dav4android.DavResource;
-import at.bitfire.dav4android.exception.DavException;
-import at.bitfire.dav4android.exception.HttpException;
-import at.bitfire.dav4android.property.AddressbookHomeSet;
-import at.bitfire.dav4android.property.ResourceType;
-import at.bitfire.davdroid.App;
-import at.bitfire.davdroid.HttpClient;
-import at.bitfire.davdroid.ui.setup.DavResourceFinder;
-import at.bitfire.davdroid.ui.setup.DavResourceFinder.Configuration.ServiceInfo;
-import at.bitfire.davdroid.ui.setup.LoginCredentials;
-import okhttp3.OkHttpClient;
-import okhttp3.mockwebserver.Dispatcher;
-import okhttp3.mockwebserver.MockResponse;
-import okhttp3.mockwebserver.MockWebServer;
-import okhttp3.mockwebserver.RecordedRequest;
-
-public class DavResourceFinderTest extends InstrumentationTestCase {
-
-    MockWebServer server = new MockWebServer();
-
-    DavResourceFinder finder;
-    OkHttpClient client;
-    LoginCredentials credentials;
-
-    private static final String
-            PATH_NO_DAV = "/nodav",
-
-            PATH_CALDAV = "/caldav",
-            PATH_CARDDAV = "/carddav",
-            PATH_CALDAV_AND_CARDDAV = "/both-caldav-carddav",
-
-            SUBPATH_PRINCIPAL = "/principal",
-            SUBPATH_ADDRESSBOOK_HOMESET = "/addressbooks",
-            SUBPATH_ADDRESSBOOK = "/addressbooks/private-contacts";
-
-    @Override
-    protected void setUp() throws Exception {
-        server.setDispatcher(new TestDispatcher());
-        server.start();
-
-        credentials = new LoginCredentials(URI.create("/"), "mock", "12345", true);
-        finder = new DavResourceFinder(getInstrumentation().getContext(), credentials);
-
-        client = HttpClient.create();
-        client = HttpClient.addAuthentication(client, credentials.userName, credentials.password, credentials.authPreemptive);
-    }
-
-    @Override
-    protected void tearDown() throws Exception {
-        server.shutdown();
-    }
-
-
-    public void testRememberIfAddressBookOrHomeset() throws IOException, HttpException, DavException {
-        ServiceInfo info;
-
-        // before dav.propfind(), no info is available
-        DavResource dav = new DavResource(client, server.url(PATH_CARDDAV + SUBPATH_PRINCIPAL));
-        finder.rememberIfAddressBookOrHomeset(dav, info = new ServiceInfo());
-        assertEquals(0, info.collections.size());
-        assertEquals(0, info.homeSets.size());
-
-        // recognize home set
-        dav.propfind(0, AddressbookHomeSet.NAME);
-        finder.rememberIfAddressBookOrHomeset(dav, info = new ServiceInfo());
-        assertEquals(0, info.collections.size());
-        assertEquals(1, info.homeSets.size());
-        assertEquals(server.url(PATH_CARDDAV + SUBPATH_ADDRESSBOOK_HOMESET + "/").uri(), info.homeSets.iterator().next());
-
-        // recognize address book
-        dav = new DavResource(client, server.url(PATH_CARDDAV + SUBPATH_ADDRESSBOOK));
-        dav.propfind(0, ResourceType.NAME);
-        finder.rememberIfAddressBookOrHomeset(dav, info = new ServiceInfo());
-        assertEquals(1, info.collections.size());
-        assertEquals(server.url(PATH_CARDDAV + SUBPATH_ADDRESSBOOK + "/").uri(), info.collections.keySet().iterator().next());
-        assertEquals(0, info.homeSets.size());
-    }
-
-    public void testProvidesService() throws IOException {
-        assertFalse(finder.providesService(server.url(PATH_NO_DAV), DavResourceFinder.Service.CALDAV));
-        assertFalse(finder.providesService(server.url(PATH_NO_DAV), DavResourceFinder.Service.CARDDAV));
-
-        assertTrue(finder.providesService(server.url(PATH_CALDAV), DavResourceFinder.Service.CALDAV));
-        assertFalse(finder.providesService(server.url(PATH_CALDAV), DavResourceFinder.Service.CARDDAV));
-
-        assertTrue(finder.providesService(server.url(PATH_CARDDAV), DavResourceFinder.Service.CARDDAV));
-        assertFalse(finder.providesService(server.url(PATH_CARDDAV), DavResourceFinder.Service.CALDAV));
-
-        assertTrue(finder.providesService(server.url(PATH_CALDAV_AND_CARDDAV), DavResourceFinder.Service.CALDAV));
-        assertTrue(finder.providesService(server.url(PATH_CALDAV_AND_CARDDAV), DavResourceFinder.Service.CARDDAV));
-    }
-
-    public void testGetCurrentUserPrincipal() throws IOException, HttpException, DavException {
-        assertNull(finder.getCurrentUserPrincipal(server.url(PATH_NO_DAV), DavResourceFinder.Service.CALDAV));
-        assertNull(finder.getCurrentUserPrincipal(server.url(PATH_NO_DAV), DavResourceFinder.Service.CARDDAV));
-
-        assertEquals(
-                server.url(PATH_CALDAV + SUBPATH_PRINCIPAL).uri(),
-                finder.getCurrentUserPrincipal(server.url(PATH_CALDAV), DavResourceFinder.Service.CALDAV)
-        );
-        assertNull(finder.getCurrentUserPrincipal(server.url(PATH_CALDAV), DavResourceFinder.Service.CARDDAV));
-
-        assertEquals(
-                server.url(PATH_CARDDAV + SUBPATH_PRINCIPAL).uri(),
-                finder.getCurrentUserPrincipal(server.url(PATH_CARDDAV), DavResourceFinder.Service.CARDDAV)
-        );
-        assertNull(finder.getCurrentUserPrincipal(server.url(PATH_CARDDAV), DavResourceFinder.Service.CALDAV));
-    }
-
-
-    // mock server
-
-    public class TestDispatcher extends Dispatcher {
-
-        @Override
-        public MockResponse dispatch(RecordedRequest rq) throws InterruptedException {
-            if (!checkAuth(rq))
-                return new MockResponse().setResponseCode(401);
-
-            String path = rq.getPath();
-
-            if ("OPTIONS".equalsIgnoreCase(rq.getMethod())) {
-                String dav = null;
-                if (path.startsWith(PATH_CALDAV))
-                    dav = "calendar-access";
-                else if (path.startsWith(PATH_CARDDAV))
-                    dav = "addressbook";
-                else if (path.startsWith(PATH_CALDAV_AND_CARDDAV))
-                    dav = "calendar-access, addressbook";
-                MockResponse response = new MockResponse().setResponseCode(200);
-                if (dav != null)
-                       response.addHeader("DAV", dav);
-                return response;
-
-            } else if ("PROPFIND".equalsIgnoreCase(rq.getMethod())) {
-                String props = null;
-                switch (path) {
-                    case PATH_CALDAV:
-                    case PATH_CARDDAV:
-                        props = "<current-user-principal><href>" + path + SUBPATH_PRINCIPAL + "</href></current-user-principal>";
-                        break;
-
-                    case PATH_CARDDAV + SUBPATH_PRINCIPAL:
-                        props = "<CARD:addressbook-home-set>" +
-                                "   <href>" + PATH_CARDDAV + SUBPATH_ADDRESSBOOK_HOMESET + "</href>" +
-                                "</CARD:addressbook-home-set>";
-                        break;
-                    case PATH_CARDDAV + SUBPATH_ADDRESSBOOK:
-                        props = "<resourcetype>" +
-                                "   <collection/>" +
-                                "   <CARD:addressbook/>" +
-                                "</resourcetype>";
-                        break;
-                }
-                App.log.info("Sending props: " + props);
-                return new MockResponse()
-                        .setResponseCode(207)
-                        .setBody("<multistatus xmlns='DAV:' xmlns:CARD='urn:ietf:params:xml:ns:carddav'>" +
-                                "<response>" +
-                                "   <href>" + rq.getPath() + "</href>" +
-                                "   <propstat><prop>" + props + "</prop></propstat>" +
-                                "</response>" +
-                                "</multistatus>");
-            }
-
-            return new MockResponse().setResponseCode(404);
-        }
-
-        private boolean checkAuth(RecordedRequest rq) {
-            return "Basic bW9jazoxMjM0NQ==".equals(rq.getHeader("Authorization"));
-        }
-    }
-
-}

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

@@ -0,0 +1,20 @@
+/***************************************************************************************************
+ * 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

@@ -0,0 +1,17 @@
+/*
+ * 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

@@ -0,0 +1,123 @@
+/*
+ * 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

@@ -0,0 +1,48 @@
+/*
+ * 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

@@ -0,0 +1,38 @@
+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/TestUtils.kt

@@ -0,0 +1,82 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid
+
+import android.content.Context
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.Observer
+import androidx.work.WorkInfo
+import androidx.work.WorkManager
+import androidx.work.WorkQuery
+import org.jetbrains.annotations.TestOnly
+import org.junit.Assert.assertTrue
+import java.util.concurrent.CountDownLatch
+import java.util.concurrent.TimeUnit
+import java.util.concurrent.TimeoutException
+import kotlin.math.abs
+
+object TestUtils {
+
+    fun assertWithin(expected: Long, actual: Long, tolerance: Long) {
+        val absDifference = abs(expected - actual)
+        assertTrue(
+            "$actual not within ($expected ± $tolerance)",
+            absDifference <= tolerance
+        )
+    }
+
+    @TestOnly
+    fun workScheduledOrRunning(context: Context, workerName: String): Boolean =
+        workInStates(context, workerName, listOf(
+            WorkInfo.State.ENQUEUED,
+            WorkInfo.State.RUNNING
+        ))
+
+    @TestOnly
+    fun workScheduledOrRunningOrSuccessful(context: Context, workerName: String): Boolean =
+        workInStates(context, workerName, listOf(
+            WorkInfo.State.ENQUEUED,
+            WorkInfo.State.RUNNING,
+            WorkInfo.State.SUCCEEDED
+        ))
+
+    @TestOnly
+    fun workInStates(context: Context, workerName: String, states: List<WorkInfo.State>): Boolean =
+        WorkManager.getInstance(context).getWorkInfos(WorkQuery.Builder
+            .fromUniqueWorkNames(listOf(workerName))
+            .addStates(states)
+            .build()
+        ).get().isNotEmpty()
+
+
+    /* Copyright 2019 Google LLC.
+    SPDX-License-Identifier: Apache-2.0 */
+    @TestOnly
+    fun <T> LiveData<T>.getOrAwaitValue(
+        time: Long = 2,
+        timeUnit: TimeUnit = TimeUnit.SECONDS
+    ): T {
+        var data: T? = null
+        val latch = CountDownLatch(1)
+        val observer = object : Observer<T> {
+            override fun onChanged(value: T) {
+                data = value
+                latch.countDown()
+                this@getOrAwaitValue.removeObserver(this)
+            }
+        }
+
+        this.observeForever(observer)
+
+        // Don't wait indefinitely if the LiveData is not set.
+        if (!latch.await(time, timeUnit)) {
+            throw TimeoutException("LiveData value was never set.")
+        }
+
+        @Suppress("UNCHECKED_CAST")
+        return data as T
+    }
+
+}

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

@@ -0,0 +1,50 @@
+/*
+ * 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

@@ -0,0 +1,156 @@
+/*
+ * 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/db/MemoryDbModule.kt

@@ -0,0 +1,33 @@
+/*
+ * 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 dagger.Module
+import dagger.Provides
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.components.SingletonComponent
+import dagger.hilt.testing.TestInstallIn
+import javax.inject.Singleton
+
+@Module
+@TestInstallIn(
+    components = [ SingletonComponent::class ],
+    replaces = [
+        AppDatabase.AppDatabaseModule::class
+    ]
+)
+class MemoryDbModule {
+
+    @Provides
+    @Singleton
+    fun inMemoryDatabase(@ApplicationContext context: Context): AppDatabase =
+        Room.inMemoryDatabaseBuilder(context, AppDatabase::class.java)
+            // auto-migrations that need to be specified explicitly
+            .addAutoMigrationSpec(AppDatabase.AutoMigration11_12(context))
+            .build()
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/network/Android10ResolverTest.kt

@@ -0,0 +1,35 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.network
+
+import android.os.Build
+import androidx.test.filters.SdkSuppress
+import org.junit.Assert.assertEquals
+import org.junit.Test
+import org.xbill.DNS.ARecord
+import org.xbill.DNS.Lookup
+import org.xbill.DNS.Type
+import java.net.Inet4Address
+import java.net.InetAddress
+
+class Android10ResolverTest {
+
+    val FQDN_DAVX5 = "www.davx5.com"
+
+    @Test
+    @SdkSuppress(minSdkVersion = Build.VERSION_CODES.Q)
+    fun testResolveA() {
+        val www = InetAddress.getAllByName(FQDN_DAVX5).filterIsInstance<Inet4Address>().first()
+
+        val srvLookup = Lookup(FQDN_DAVX5, Type.A)
+        srvLookup.setResolver(Android10Resolver())
+        val resultGeneric = srvLookup.run()
+        assertEquals(1, resultGeneric.size)
+
+        val result = resultGeneric.first() as ARecord
+        assertEquals(www, result.address)
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/network/DnsRecordResolverTest.kt

@@ -0,0 +1,122 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.network
+
+import dagger.hilt.android.testing.HiltAndroidRule
+import dagger.hilt.android.testing.HiltAndroidTest
+import org.junit.Assert.assertArrayEquals
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Assert.assertTrue
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.xbill.DNS.DClass
+import org.xbill.DNS.Name
+import org.xbill.DNS.SRVRecord
+import org.xbill.DNS.TXTRecord
+import javax.inject.Inject
+
+@HiltAndroidTest
+class DnsRecordResolverTest {
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    @Inject
+    lateinit var dnsRecordResolver: DnsRecordResolver
+
+    @Before
+    fun setup() {
+        hiltRule.inject()
+    }
+
+
+    @Test
+    fun testBestSRVRecord_Empty() {
+        assertNull(dnsRecordResolver.bestSRVRecord(emptyArray()))
+    }
+
+    @Test
+    fun testBestSRVRecord_MultipleRecords_Priority_Different() {
+        val dns1010 = SRVRecord(
+            Name.fromString("_caldavs._tcp.example.com."),
+            DClass.IN, 3600, 10, 10, 8443, Name.fromString("dav1010.example.com.")
+        )
+        val dns2010 = SRVRecord(
+            Name.fromString("_caldavs._tcp.example.com."),
+            DClass.IN, 3600, 20, 20, 8443, Name.fromString("dav2010.example.com.")
+        )
+
+        // lowest priority first
+        val result = dnsRecordResolver.bestSRVRecord(arrayOf(dns1010, dns2010))
+        assertEquals(dns1010, result)
+    }
+
+    @Test
+    fun testBestSRVRecord_MultipleRecords_Priority_Same() {
+        val dns1010 = SRVRecord(
+            Name.fromString("_caldavs._tcp.example.com."),
+            DClass.IN, 3600, 10, 10, 8443, Name.fromString("dav1010.example.com.")
+        )
+        val dns1020 = SRVRecord(
+            Name.fromString("_caldavs._tcp.example.com."),
+            DClass.IN, 3600, 10, 20, 8443, Name.fromString("dav1020.example.com.")
+        )
+
+        // entries are selected randomly (for load balancing)
+        // run 1000 times to get a good distribution
+        val counts = IntArray(2)
+        for (i in 0 until 1000) {
+            val result = dnsRecordResolver.bestSRVRecord(arrayOf(dns1010, dns1020))
+
+            when (result) {
+                dns1010 -> counts[0]++
+                dns1020 -> counts[1]++
+            }
+        }
+
+        /* We had weights 10 and 20, so the distribution of 1000 tries should be roughly
+            weight 10   fraction 1/3   expected count 333   binomial distribution (p=1/3) with 99.99% in [275..393]
+            weight 20   fraction 2/3   expected count 667   binomial distribution (p=2/3) with 99.99% in [607..725]
+         */
+        assertTrue(counts[0] in 275..393)
+        assertTrue(counts[1] in 607..725)
+    }
+
+    @Test
+    fun testBestSRVRecord_OneRecord() {
+        val dns1010 = SRVRecord(
+            Name.fromString("_caldavs._tcp.example.com."),
+            DClass.IN, 3600, 10, 10, 8443, Name.fromString("dav1010.example.com.")
+        )
+        val result = dnsRecordResolver.bestSRVRecord(arrayOf(dns1010))
+        assertEquals(dns1010, result)
+    }
+
+
+    @Test
+    fun testPathsFromTXTRecords_Empty() {
+        assertTrue(dnsRecordResolver.pathsFromTXTRecords(arrayOf()).isEmpty())
+    }
+
+    @Test
+    fun testPathsFromTXTRecords_OnePath() {
+        val result = dnsRecordResolver.pathsFromTXTRecords(arrayOf(
+            TXTRecord(Name.fromString("example.com."), 0, 0L, listOf("something=else", "path=/path1"))
+        )).toTypedArray()
+        assertArrayEquals(arrayOf("/path1"), result)
+    }
+
+    @Test
+    fun testPathsFromTXTRecords_TwoPaths() {
+        val result = dnsRecordResolver.pathsFromTXTRecords(arrayOf(
+            TXTRecord(Name.fromString("example.com."), 0, 0L, listOf("path=/path1", "something-else", "path=/path2"))
+        )).toTypedArray()
+        result.sort()
+        assertArrayEquals(arrayOf("/path1", "/path2"), result)
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/network/HttpClientTest.kt

@@ -0,0 +1,91 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.network
+
+import android.content.Context
+import android.security.NetworkSecurityPolicy
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.android.testing.HiltAndroidRule
+import dagger.hilt.android.testing.HiltAndroidTest
+import okhttp3.Request
+import okhttp3.mockwebserver.MockResponse
+import okhttp3.mockwebserver.MockWebServer
+import org.junit.After
+import org.junit.Assert.assertEquals
+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 HttpClientTest {
+
+    lateinit var server: MockWebServer
+    lateinit var httpClient: HttpClient
+
+    @get:Rule
+    var hiltRule = HiltAndroidRule(this)
+
+    @Inject
+    @ApplicationContext
+    lateinit var context: Context
+
+    @Before
+    fun setUp() {
+        hiltRule.inject()
+
+        httpClient = HttpClient.Builder(context).build()
+
+        server = MockWebServer()
+        server.start(30000)
+    }
+
+    @After
+    fun tearDown() {
+        server.shutdown()
+        httpClient.close()
+    }
+
+
+    @Test
+    fun testCookies() {
+        Assume.assumeTrue(NetworkSecurityPolicy.getInstance().isCleartextTrafficPermitted)
+        val url = server.url("/test")
+
+        // set cookie for root path (/) and /test path in first response
+        server.enqueue(MockResponse()
+                .setResponseCode(200)
+                .addHeader("Set-Cookie", "cookie1=1; path=/")
+                .addHeader("Set-Cookie", "cookie2=2")
+                .setBody("Cookie set"))
+        httpClient.okHttpClient.newCall(Request.Builder()
+                .get().url(url)
+                .build()).execute()
+        assertNull(server.takeRequest().getHeader("Cookie"))
+
+        // cookie should be sent with second request
+        // second response lets first cookie expire and overwrites second cookie
+        server.enqueue(MockResponse()
+                .addHeader("Set-Cookie", "cookie1=1a; path=/; Max-Age=0")
+                .addHeader("Set-Cookie", "cookie2=2a")
+                .setResponseCode(200))
+        httpClient.okHttpClient.newCall(Request.Builder()
+                .get().url(url)
+                .build()).execute()
+        val header = server.takeRequest().getHeader("Cookie")
+        assertTrue(header == "cookie1=1; cookie2=2" || header == "cookie2=2; cookie1=1")
+
+        server.enqueue(MockResponse()
+                .setResponseCode(200))
+        httpClient.okHttpClient.newCall(Request.Builder()
+                .get().url(url)
+                .build()).execute()
+        assertEquals("cookie2=2a", server.takeRequest().getHeader("Cookie"))
+    }
+
+}

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

@@ -0,0 +1,88 @@
+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

@@ -0,0 +1,78 @@
+/*
+ * 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/LocalAddressBookTest.kt

@@ -0,0 +1,151 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.resource
+
+import android.Manifest
+import android.accounts.Account
+import android.content.ContentProviderClient
+import android.content.ContentUris
+import android.content.Context
+import android.provider.ContactsContract
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.rule.GrantPermissionRule
+import at.bitfire.vcard4android.Contact
+import at.bitfire.vcard4android.GroupMethod
+import at.bitfire.vcard4android.LabeledProperty
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.android.testing.HiltAndroidRule
+import dagger.hilt.android.testing.HiltAndroidTest
+import ezvcard.property.Telephone
+import java.util.LinkedList
+import javax.inject.Inject
+import org.junit.After
+import org.junit.AfterClass
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertNotNull
+import org.junit.Before
+import org.junit.BeforeClass
+import org.junit.ClassRule
+import org.junit.Rule
+import org.junit.Test
+
+@HiltAndroidTest
+class LocalAddressBookTest {
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    @Inject
+    lateinit var addressbookFactory: LocalTestAddressBook.Factory
+
+    @Inject
+    @ApplicationContext
+    lateinit var context: Context
+
+    lateinit var addressBook: LocalTestAddressBook
+
+
+    @Before
+    fun setUp() {
+        hiltRule.inject()
+
+        addressBook = addressbookFactory.create(provider, GroupMethod.CATEGORIES)
+        LocalTestAddressBook.createAccount(context)
+    }
+
+    @After
+    fun tearDown() {
+        // remove address book
+        addressBook.deleteCollection()
+    }
+
+
+    /**
+     * Tests whether contacts are moved (and not lost) when an address book is renamed.
+     */
+    @Test
+    fun test_renameAccount_retainsContacts() {
+        // insert contact with data row
+        val uid = "12345"
+        val contact = Contact(
+            uid = uid,
+            displayName = "Test Contact",
+            phoneNumbers = LinkedList(listOf(LabeledProperty(Telephone("1234567890"))))
+        )
+        val uri = LocalContact(addressBook, contact, null, null, 0).add()
+        val id = ContentUris.parseId(uri)
+        val localContact = addressBook.findContactById(id)
+        localContact.resetDirty()
+        assertFalse("Contact is dirty before moving", addressBook.isContactDirty(id))
+
+        // rename address book
+        val newName = "New Name"
+        addressBook.renameAccount(newName)
+        assertEquals(Account(newName, LocalTestAddressBook.ACCOUNT.type), addressBook.addressBookAccount)
+
+        // check whether contact is still here (including data rows) and not dirty
+        val result = addressBook.findContactById(id)
+        assertFalse("Contact is dirty after moving", addressBook.isContactDirty(id))
+
+        val contact2 = result.getContact()
+        assertEquals(uid, contact2.uid)
+        assertEquals("Test Contact", contact2.displayName)
+        assertEquals("1234567890", contact2.phoneNumbers.first().component1().text)
+    }
+
+    /**
+     * Tests whether groups are moved (and not lost) when an address book is renamed.
+     */
+    @Test
+    fun test_renameAccount_retainsGroups() {
+        // insert group
+        val localGroup = LocalGroup(addressBook, Contact(displayName = "Test Group"), null, null, 0)
+        val uri = localGroup.add()
+        val id = ContentUris.parseId(uri)
+
+        // make sure it's not dirty
+        localGroup.clearDirty(null, null, null)
+        assertFalse("Group is dirty before moving", addressBook.isGroupDirty(id))
+
+        // rename address book
+        val newName = "New Name"
+        addressBook.renameAccount(newName)
+        assertEquals(Account(newName, LocalTestAddressBook.ACCOUNT.type), addressBook.addressBookAccount)
+
+        // check whether group is still here and not dirty
+        val result = addressBook.findGroupById(id)
+        assertFalse("Group is dirty after moving", addressBook.isGroupDirty(id))
+
+        val group = result.getContact()
+        assertEquals("Test Group", group.displayName)
+    }
+
+
+
+    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()
+        }
+    }
+
+}

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

@@ -0,0 +1,151 @@
+/*
+ * 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

@@ -0,0 +1,484 @@
+/*
+ * 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

@@ -0,0 +1,281 @@
+/*
+ * 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/resource/LocalTestAddressBook.kt

@@ -0,0 +1,97 @@
+/*
+ * 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.ContentUris
+import android.content.Context
+import android.provider.ContactsContract
+import at.bitfire.davdroid.repository.DavCollectionRepository
+import at.bitfire.davdroid.repository.DavServiceRepository
+import at.bitfire.davdroid.settings.AccountSettings
+import at.bitfire.vcard4android.GroupMethod
+import dagger.assisted.Assisted
+import dagger.assisted.AssistedFactory
+import dagger.assisted.AssistedInject
+import dagger.hilt.android.qualifiers.ApplicationContext
+import org.junit.Assert.assertTrue
+import java.io.FileNotFoundException
+import java.util.logging.Logger
+
+class LocalTestAddressBook @AssistedInject constructor(
+    @Assisted provider: ContentProviderClient,
+    @Assisted override val groupMethod: GroupMethod,
+    accountSettingsFactory: AccountSettings.Factory,
+    collectionRepository: DavCollectionRepository,
+    @ApplicationContext context: Context,
+    logger: Logger,
+    serviceRepository: DavServiceRepository
+): LocalAddressBook(ACCOUNT, provider, accountSettingsFactory, collectionRepository, context, logger, serviceRepository) {
+
+    @AssistedFactory
+    interface Factory {
+        fun create(provider: ContentProviderClient, groupMethod: GroupMethod): LocalTestAddressBook
+    }
+
+    override var readOnly: Boolean
+        get() = false
+        set(_) = throw NotImplementedError()
+
+
+    fun clear() {
+        for (contact in queryContacts(null, null))
+            contact.delete()
+        for (group in queryGroups(null, null))
+            group.delete()
+    }
+
+
+    /**
+     * Returns the dirty flag of the given contact.
+     *
+     * @return true if the contact is dirty, false otherwise
+     *
+     * @throws FileNotFoundException if the contact can't be found
+     */
+    fun isContactDirty(id: Long): Boolean {
+        val uri = ContentUris.withAppendedId(rawContactsSyncUri(), id)
+        provider!!.query(uri, arrayOf(ContactsContract.RawContacts.DIRTY), null, null, null)?.use { cursor ->
+            if (cursor.moveToFirst())
+                return cursor.getInt(0) != 0
+        }
+        throw FileNotFoundException()
+    }
+
+    /**
+     * Returns the dirty flag of the given contact group.
+     *
+     * @return true if the group is dirty, false otherwise
+     *
+     * @throws FileNotFoundException if the group can't be found
+     */
+    fun isGroupDirty(id: Long): Boolean {
+        val uri = ContentUris.withAppendedId(groupsSyncUri(), id)
+        provider!!.query(uri, arrayOf(ContactsContract.Groups.DIRTY), null, null, null)?.use { cursor ->
+            if (cursor.moveToFirst())
+                return cursor.getInt(0) != 0
+        }
+        throw FileNotFoundException()
+    }
+
+
+    companion object {
+
+        val ACCOUNT = Account("LocalTestAddressBook", "at.bitfire.davdroid.test")
+
+        fun createAccount(context: Context) {
+            val am = AccountManager.get(context)
+            assertTrue("Couldn't create account for local test address-book", am.addAccountExplicitly(ACCOUNT, null, null))
+        }
+
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/resource/contactrow/CachedGroupMembershipHandlerTest.kt

@@ -0,0 +1,87 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.resource.contactrow
+
+import android.Manifest
+import android.content.ContentProviderClient
+import android.content.ContentValues
+import android.content.Context
+import android.provider.ContactsContract
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.rule.GrantPermissionRule
+import at.bitfire.davdroid.resource.LocalContact
+import at.bitfire.davdroid.resource.LocalTestAddressBook
+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.assertArrayEquals
+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 CachedGroupMembershipHandlerTest {
+
+    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().context
+            provider = context.contentResolver.acquireContentProviderClient(ContactsContract.AUTHORITY)!!
+        }
+
+        @AfterClass
+        @JvmStatic
+        fun disconnect() {
+            provider.close()
+        }
+
+    }
+
+
+    @Inject
+    lateinit var addressbookFactory: LocalTestAddressBook.Factory
+
+    @Inject
+    @ApplicationContext
+    lateinit var context: Context
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    @Before
+    fun inject() {
+        hiltRule.inject()
+    }
+
+
+    @Test
+    fun testMembership() {
+        val addressBook = addressbookFactory.create(provider, GroupMethod.GROUP_VCARDS)
+
+        val contact = Contact()
+        val localContact = LocalContact(addressBook, contact, null, null, 0)
+        CachedGroupMembershipHandler(localContact).handle(ContentValues().apply {
+            put(CachedGroupMembership.GROUP_ID, 123456)
+            put(CachedGroupMembership.RAW_CONTACT_ID, 789)
+        }, contact)
+        assertArrayEquals(arrayOf(123456L), localContact.cachedGroupMemberships.toArray())
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/resource/contactrow/GroupMembershipBuilderTest.kt

@@ -0,0 +1,97 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.resource.contactrow
+
+import android.Manifest
+import android.content.ContentProviderClient
+import android.content.Context
+import android.net.Uri
+import android.provider.ContactsContract
+import android.provider.ContactsContract.CommonDataKinds.GroupMembership
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.rule.GrantPermissionRule
+import at.bitfire.davdroid.resource.LocalTestAddressBook
+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.Before
+import org.junit.BeforeClass
+import org.junit.ClassRule
+import org.junit.Rule
+import org.junit.Test
+import javax.inject.Inject
+
+@HiltAndroidTest
+class GroupMembershipBuilderTest {
+
+    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: Context = InstrumentationRegistry.getInstrumentation().targetContext
+            provider = context.contentResolver.acquireContentProviderClient(ContactsContract.AUTHORITY)!!
+        }
+
+        @AfterClass
+        @JvmStatic
+        fun disconnect() {
+            provider.close()
+        }
+
+    }
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    @Inject
+    lateinit var addressbookFactory: LocalTestAddressBook.Factory
+
+    @Inject
+    @ApplicationContext
+    lateinit var context: Context
+
+    @Before
+    fun inject() {
+        hiltRule.inject()
+    }
+
+
+    @Test
+    fun testCategories_GroupsAsCategories() {
+        val contact = Contact().apply {
+            categories += "TEST GROUP"
+        }
+        val addressBookGroupsAsCategories = addressbookFactory.create(provider, GroupMethod.CATEGORIES)
+        GroupMembershipBuilder(Uri.EMPTY, null, contact, addressBookGroupsAsCategories, false).build().also { result ->
+            assertEquals(1, result.size)
+            assertEquals(GroupMembership.CONTENT_ITEM_TYPE, result[0].values[GroupMembership.MIMETYPE])
+            assertEquals(addressBookGroupsAsCategories.findOrCreateGroup("TEST GROUP"), result[0].values[GroupMembership.GROUP_ROW_ID])
+        }
+    }
+
+    @Test
+    fun testCategories_GroupsAsVCards() {
+        val contact = Contact().apply {
+            categories += "TEST GROUP"
+        }
+        val addressBookGroupsAsVCards = addressbookFactory.create(provider, GroupMethod.GROUP_VCARDS)
+        GroupMembershipBuilder(Uri.EMPTY, null, contact, addressBookGroupsAsVCards, false).build().also { result ->
+            // group membership is constructed during post-processing
+            assertEquals(0, result.size)
+        }
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/resource/contactrow/GroupMembershipHandlerTest.kt

@@ -0,0 +1,105 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.resource.contactrow
+
+import android.Manifest
+import android.content.ContentProviderClient
+import android.content.ContentValues
+import android.content.Context
+import android.provider.ContactsContract
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.test.rule.GrantPermissionRule
+import at.bitfire.davdroid.resource.LocalContact
+import at.bitfire.davdroid.resource.LocalTestAddressBook
+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
+import org.junit.Assert.assertArrayEquals
+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 GroupMembershipHandlerTest {
+
+    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: Context = InstrumentationRegistry.getInstrumentation().context
+            provider = context.contentResolver.acquireContentProviderClient(ContactsContract.AUTHORITY)!!
+            Assert.assertNotNull(provider)
+        }
+
+        @AfterClass
+        @JvmStatic
+        fun disconnect() {
+            provider.close()
+        }
+
+    }
+
+    @Inject
+    lateinit var addressbookFactory: LocalTestAddressBook.Factory
+
+    @Inject @ApplicationContext
+    lateinit var context: Context
+
+    @get:Rule
+    var hiltRule = HiltAndroidRule(this)
+
+    @Before
+    fun inject() {
+        hiltRule.inject()
+    }
+
+
+    @Test
+    fun testMembership_GroupsAsCategories() {
+        val addressBookGroupsAsCategories = addressbookFactory.create(provider, GroupMethod.CATEGORIES)
+        val addressBookGroupsAsCategoriesGroup = addressBookGroupsAsCategories.findOrCreateGroup("TEST GROUP")
+
+        val contact = Contact()
+        val localContact = LocalContact(addressBookGroupsAsCategories, contact, null, null, 0)
+        GroupMembershipHandler(localContact).handle(ContentValues().apply {
+            put(CachedGroupMembership.GROUP_ID, addressBookGroupsAsCategoriesGroup)
+            put(CachedGroupMembership.RAW_CONTACT_ID, -1)
+        }, contact)
+        assertArrayEquals(arrayOf(addressBookGroupsAsCategoriesGroup), localContact.groupMemberships.toArray())
+        assertArrayEquals(arrayOf("TEST GROUP"), contact.categories.toArray())
+    }
+
+
+    @Test
+    fun testMembership_GroupsAsVCards() {
+        val addressBookGroupsAsVCards = addressbookFactory.create(provider, GroupMethod.GROUP_VCARDS)
+
+        val contact = Contact()
+        val localContact = LocalContact(addressBookGroupsAsVCards, contact, null, null, 0)
+        GroupMembershipHandler(localContact).handle(ContentValues().apply {
+            put(CachedGroupMembership.GROUP_ID, 12345)    // because the group name is not queried and put into CATEGORIES, the group doesn't have to really exist
+            put(CachedGroupMembership.RAW_CONTACT_ID, -1)
+        }, contact)
+        assertArrayEquals(arrayOf(12345L), localContact.groupMemberships.toArray())
+        assertTrue(contact.categories.isEmpty())
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/resource/contactrow/UnknownPropertiesBuilderTest.kt

@@ -0,0 +1,32 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.resource.contactrow
+
+import android.net.Uri
+import at.bitfire.vcard4android.Contact
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class UnknownPropertiesBuilderTest {
+
+    @Test
+    fun testUnknownProperties_None() {
+        UnknownPropertiesBuilder(Uri.EMPTY, null, Contact(), false).build().also { result ->
+            assertEquals(0, result.size)
+        }
+    }
+
+    @Test
+    fun testUnknownProperties_Properties() {
+        UnknownPropertiesBuilder(Uri.EMPTY, null, Contact().apply {
+            unknownProperties = "X-TEST:12345"
+        }, false).build().also { result ->
+            assertEquals(1, result.size)
+            assertEquals(UnknownProperties.CONTENT_ITEM_TYPE, result[0].values[UnknownProperties.MIMETYPE])
+            assertEquals("X-TEST:12345", result[0].values[UnknownProperties.UNKNOWN_PROPERTIES])
+        }
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/resource/contactrow/UnknownPropertiesHandlerTest.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.resource.contactrow
+
+import android.content.ContentValues
+import at.bitfire.vcard4android.Contact
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Test
+
+class UnknownPropertiesHandlerTest {
+
+    @Test
+    fun testUnknownProperties_Empty() {
+        val contact = Contact()
+        UnknownPropertiesHandler.handle(ContentValues().apply {
+            putNull(UnknownProperties.UNKNOWN_PROPERTIES)
+        }, contact)
+        assertNull(contact.unknownProperties)
+    }
+
+    @Test
+    fun testUnknownProperties_Values() {
+        val contact = Contact()
+        UnknownPropertiesHandler.handle(ContentValues().apply {
+            put(UnknownProperties.UNKNOWN_PROPERTIES, "X-TEST:12345")
+        }, contact)
+        assertEquals("X-TEST:12345", contact.unknownProperties)
+    }
+
+}

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

@@ -0,0 +1,718 @@
+/*
+ * 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/servicedetection/DavResourceFinderTest.kt

@@ -0,0 +1,237 @@
+/*
+ * 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 androidx.test.filters.SmallTest
+import at.bitfire.dav4jvm.DavResource
+import at.bitfire.dav4jvm.property.carddav.AddressbookHomeSet
+import at.bitfire.dav4jvm.property.webdav.ResourceType
+import at.bitfire.davdroid.db.Credentials
+import at.bitfire.davdroid.network.HttpClient
+import at.bitfire.davdroid.servicedetection.DavResourceFinder.Configuration.ServiceInfo
+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.mockwebserver.Dispatcher
+import okhttp3.mockwebserver.MockResponse
+import okhttp3.mockwebserver.MockWebServer
+import okhttp3.mockwebserver.RecordedRequest
+import org.junit.After
+import org.junit.Assert.assertArrayEquals
+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 java.net.URI
+import java.util.logging.Logger
+import javax.inject.Inject
+
+@HiltAndroidTest
+class DavResourceFinderTest {
+
+    companion object {
+        private const val PATH_NO_DAV = "/nodav"
+        private const val PATH_CALDAV = "/caldav"
+        private const val PATH_CARDDAV = "/carddav"
+        private const val PATH_CALDAV_AND_CARDDAV = "/both-caldav-carddav"
+
+        private const val SUBPATH_PRINCIPAL = "/principal"
+        private const val SUBPATH_ADDRESSBOOK_HOMESET = "/addressbooks"
+        private const val SUBPATH_ADDRESSBOOK = "/addressbooks/private-contacts"
+    }
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    @Inject
+    @ApplicationContext
+    lateinit var context: Context
+
+    @Inject
+    lateinit var logger: Logger
+
+    @Inject
+    lateinit var resourceFinderFactory: DavResourceFinder.Factory
+
+    @Inject
+    lateinit var settingsManager: SettingsManager
+
+    private val server = MockWebServer()
+
+    private lateinit var finder: DavResourceFinder
+    private lateinit var client: HttpClient
+
+    @Before
+    fun setup() {
+        hiltRule.inject()
+
+        server.dispatcher = TestDispatcher(logger)
+        server.start()
+
+        val baseURI = URI.create("/")
+        val credentials = Credentials("mock", "12345")
+
+        finder = resourceFinderFactory.create(baseURI, credentials)
+        client = HttpClient.Builder(context)
+                .addAuthentication(null, credentials)
+                .build()
+
+        Assume.assumeTrue(NetworkSecurityPolicy.getInstance().isCleartextTrafficPermitted)
+    }
+
+    @After
+    fun teardown() {
+        server.shutdown()
+    }
+
+
+    @Test
+    @SmallTest
+    fun testRememberIfAddressBookOrHomeset() {
+        // recognize home set
+        var info = ServiceInfo()
+        DavResource(client.okHttpClient, server.url(PATH_CARDDAV + SUBPATH_PRINCIPAL))
+                .propfind(0, AddressbookHomeSet.NAME) { response, _ ->
+            finder.scanResponse(ResourceType.ADDRESSBOOK, response, info)
+        }
+        assertEquals(0, info.collections.size)
+        assertEquals(1, info.homeSets.size)
+        assertEquals(server.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_HOMESET/"), info.homeSets.first())
+
+        // recognize address book
+        info = ServiceInfo()
+        DavResource(client.okHttpClient, server.url(PATH_CARDDAV + SUBPATH_ADDRESSBOOK))
+                .propfind(0, ResourceType.NAME) { response, _ ->
+            finder.scanResponse(ResourceType.ADDRESSBOOK, response, info)
+        }
+        assertEquals(1, info.collections.size)
+        assertEquals(server.url("$PATH_CARDDAV$SUBPATH_ADDRESSBOOK/"), info.collections.keys.first())
+        assertEquals(0, info.homeSets.size)
+    }
+
+    @Test
+    fun testProvidesService() {
+        assertFalse(finder.providesService(server.url(PATH_NO_DAV), DavResourceFinder.Service.CALDAV))
+        assertFalse(finder.providesService(server.url(PATH_NO_DAV), DavResourceFinder.Service.CARDDAV))
+
+        assertTrue(finder.providesService(server.url(PATH_CALDAV), DavResourceFinder.Service.CALDAV))
+        assertFalse(finder.providesService(server.url(PATH_CALDAV), DavResourceFinder.Service.CARDDAV))
+
+        assertTrue(finder.providesService(server.url(PATH_CARDDAV), DavResourceFinder.Service.CARDDAV))
+        assertFalse(finder.providesService(server.url(PATH_CARDDAV), DavResourceFinder.Service.CALDAV))
+
+        assertTrue(finder.providesService(server.url(PATH_CALDAV_AND_CARDDAV), DavResourceFinder.Service.CALDAV))
+        assertTrue(finder.providesService(server.url(PATH_CALDAV_AND_CARDDAV), DavResourceFinder.Service.CARDDAV))
+    }
+
+    @Test
+    fun testGetCurrentUserPrincipal() {
+        assertNull(finder.getCurrentUserPrincipal(server.url(PATH_NO_DAV), DavResourceFinder.Service.CALDAV))
+        assertNull(finder.getCurrentUserPrincipal(server.url(PATH_NO_DAV), DavResourceFinder.Service.CARDDAV))
+
+        assertEquals(
+                server.url(PATH_CALDAV + SUBPATH_PRINCIPAL),
+                finder.getCurrentUserPrincipal(server.url(PATH_CALDAV), DavResourceFinder.Service.CALDAV)
+        )
+        assertNull(finder.getCurrentUserPrincipal(server.url(PATH_CALDAV), DavResourceFinder.Service.CARDDAV))
+
+        assertEquals(
+                server.url(PATH_CARDDAV + SUBPATH_PRINCIPAL),
+                finder.getCurrentUserPrincipal(server.url(PATH_CARDDAV), DavResourceFinder.Service.CARDDAV)
+        )
+        assertNull(finder.getCurrentUserPrincipal(server.url(PATH_CARDDAV), DavResourceFinder.Service.CALDAV))
+    }
+
+    @Test
+    fun testQueryEmailAddress() {
+        var info = ServiceInfo()
+        assertArrayEquals(
+                arrayOf("email1@example.com", "email2@example.com"),
+                finder.queryEmailAddress(server.url(PATH_CALDAV + SUBPATH_PRINCIPAL)).toTypedArray()
+        )
+        assertTrue(finder.queryEmailAddress(server.url(PATH_CARDDAV + SUBPATH_PRINCIPAL)).isEmpty())
+    }
+
+
+    // mock server
+
+    class TestDispatcher(
+        private val logger: Logger
+    ): Dispatcher() {
+
+        override fun dispatch(request: RecordedRequest): MockResponse {
+            if (!checkAuth(request)) {
+                val authenticate = MockResponse().setResponseCode(401)
+                authenticate.setHeader("WWW-Authenticate", "Basic realm=\"test\"")
+                return authenticate
+            }
+
+            val path = request.path!!
+
+            if (request.method.equals("OPTIONS", true)) {
+                val dav = when {
+                    path.startsWith(PATH_CALDAV) -> "calendar-access"
+                    path.startsWith(PATH_CARDDAV) -> "addressbook"
+                    path.startsWith(PATH_CALDAV_AND_CARDDAV) -> "calendar-access, addressbook"
+                    else -> null
+                }
+                val response = MockResponse().setResponseCode(200)
+                if (dav != null)
+                    response.addHeader("DAV", dav)
+                return response
+            } else if (request.method.equals("PROPFIND", true)) {
+                val props: String?
+                when (path) {
+                    PATH_CALDAV,
+                    PATH_CARDDAV ->
+                        props = "<current-user-principal><href>$path$SUBPATH_PRINCIPAL</href></current-user-principal>"
+
+                    PATH_CARDDAV + SUBPATH_PRINCIPAL ->
+                        props = "<CARD:addressbook-home-set>" +
+                                "   <href>$PATH_CARDDAV$SUBPATH_ADDRESSBOOK_HOMESET</href>" +
+                                "</CARD:addressbook-home-set>"
+
+                    PATH_CARDDAV + SUBPATH_ADDRESSBOOK ->
+                        props = "<resourcetype>" +
+                                "   <collection/>" +
+                                "   <CARD:addressbook/>" +
+                                "</resourcetype>"
+
+                    PATH_CALDAV + SUBPATH_PRINCIPAL ->
+                        props = "<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>"
+
+                    else -> props = null
+                }
+                logger.info("Sending props: $props")
+                return MockResponse()
+                        .setResponseCode(207)
+                        .setBody("<multistatus xmlns='DAV:' xmlns:CARD='urn:ietf:params:xml:ns:carddav' xmlns:CAL='urn:ietf:params:xml:ns:caldav'>" +
+                                "<response>" +
+                                "   <href>${request.path}</href>" +
+                                "   <propstat><prop>$props</prop></propstat>" +
+                                "</response>" +
+                                "</multistatus>")
+            }
+
+            return MockResponse().setResponseCode(404)
+        }
+
+        private fun checkAuth(rq: RecordedRequest) =
+            rq.getHeader("Authorization") == "Basic bW9jazoxMjM0NQ=="
+
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/settings/SettingsManagerTest.kt

@@ -0,0 +1,93 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.settings
+
+import androidx.arch.core.executor.testing.InstantTaskExecutorRule
+import dagger.hilt.android.testing.HiltAndroidRule
+import dagger.hilt.android.testing.HiltAndroidTest
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.flow.take
+import kotlinx.coroutines.flow.toSet
+import kotlinx.coroutines.runBlocking
+import org.junit.After
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import javax.inject.Inject
+
+@HiltAndroidTest
+class SettingsManagerTest {
+
+    companion object {
+        /** Use this setting to test SettingsManager methods. Will be removed after every test run. */
+        const val SETTING_TEST = "test"
+    }
+
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+    @get:Rule
+    val instantTaskExecutorRule = InstantTaskExecutorRule()
+
+    @Inject lateinit var settingsManager: SettingsManager
+
+    @Before
+    fun inject() {
+        hiltRule.inject()
+    }
+
+    @After
+    fun removeTestSetting() {
+        settingsManager.remove(SETTING_TEST)
+    }
+
+
+    @Test
+    fun test_containsKey_NotExisting() {
+        assertFalse(settingsManager.containsKey("notExisting"))
+    }
+
+    @Test
+    fun test_containsKey_Existing() {
+        // provided by DefaultsProvider
+        assertEquals(Settings.PROXY_TYPE_SYSTEM, settingsManager.getInt(Settings.PROXY_TYPE))
+    }
+
+
+    @Test
+    fun test_observerFlow_initialValue() = runBlocking {
+        var counter = 0
+        val live = settingsManager.observerFlow {
+            if (counter++ == 0)
+                23
+            else
+                throw AssertionError("A second value was requested")
+        }
+        assertEquals(23, live.first())
+    }
+
+    @Test
+    fun test_observerFlow_updatedValue() = runBlocking {
+        var counter = 0
+        val live = settingsManager.observerFlow {
+            when (counter++) {
+                0 -> {
+                    // update some setting so that we will be called a second time
+                    settingsManager.putBoolean(SETTING_TEST, true)
+                    // and emit initial value
+                    23
+                }
+                1 -> 42     // updated value
+                else -> throw AssertionError()
+            }
+        }
+
+        val result = live.take(2).toSet()
+        assertEquals(setOf(23, 42), result)
+    }
+
+}

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

@@ -0,0 +1,49 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.sync
+
+import at.bitfire.davdroid.db.SyncState
+import at.bitfire.davdroid.resource.LocalCollection
+
+class LocalTestCollection(
+    override val collectionUrl: String = "http://example.com/test/"
+): LocalCollection<LocalTestResource> {
+
+    override val tag = "LocalTestCollection"
+    override val title = "Local Test Collection"
+
+    override var lastSyncState: SyncState? = null
+
+    val entries = mutableListOf<LocalTestResource>()
+
+    override val readOnly: Boolean
+        get() = throw NotImplementedError()
+
+    override fun deleteCollection(): Boolean = true
+
+    override fun findDeleted() = entries.filter { it.deleted }
+    override fun findDirty() = entries.filter { it.dirty }
+
+    override fun findByName(name: String) = entries.firstOrNull { it.fileName == name }
+
+    override fun markNotDirty(flags: Int): Int {
+        var updated = 0
+        for (dirty in findDirty()) {
+            dirty.flags = flags
+            updated++
+        }
+        return updated
+    }
+
+    override fun removeNotDirtyMarked(flags: Int): Int {
+        val numBefore = entries.size
+        entries.removeIf { !it.dirty && it.flags == flags }
+        return numBefore - entries.size
+    }
+
+    override fun forgetETags() {
+    }
+
+}

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

@@ -0,0 +1,39 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.sync
+
+import at.bitfire.davdroid.resource.LocalResource
+
+class LocalTestResource: LocalResource<Any> {
+
+    override val id: Long? = null
+    override var fileName: String? = null
+    override var eTag: String? = null
+    override var scheduleTag: String? = null
+    override var flags: Int = 0
+
+    var deleted = false
+    var dirty = false
+
+    override fun prepareForUpload() = "generated-file.txt"
+
+    override fun clearDirty(fileName: String?, eTag: String?, scheduleTag: String?) {
+        dirty = false
+        if (fileName != null)
+            this.fileName = fileName
+        this.eTag = eTag
+        this.scheduleTag = scheduleTag
+    }
+
+    override fun updateFlags(flags: Int) {
+        this.flags = flags
+    }
+
+    override fun add() = throw NotImplementedError()
+    override fun update(data: Any) = throw NotImplementedError()
+    override fun delete() = throw NotImplementedError()
+    override fun resetDeleted() = throw NotImplementedError()
+
+}

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

@@ -0,0 +1,192 @@
+/*
+ * 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.Context
+import android.content.SyncResult
+import android.os.Bundle
+import android.provider.CalendarContract
+import android.util.Log
+import androidx.hilt.work.HiltWorkerFactory
+import androidx.work.Configuration
+import androidx.work.WorkInfo
+import androidx.work.WorkManager
+import androidx.work.testing.WorkManagerTestInitHelper
+import at.bitfire.davdroid.repository.DavCollectionRepository
+import at.bitfire.davdroid.repository.DavServiceRepository
+import at.bitfire.davdroid.settings.AccountSettings
+import at.bitfire.davdroid.sync.account.TestAccountAuthenticator
+import at.bitfire.davdroid.sync.worker.SyncWorkerManager
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.android.testing.HiltAndroidRule
+import dagger.hilt.android.testing.HiltAndroidTest
+import io.mockk.Awaits
+import io.mockk.coEvery
+import io.mockk.every
+import io.mockk.just
+import io.mockk.mockk
+import io.mockk.mockkObject
+import io.mockk.mockkStatic
+import io.mockk.unmockkAll
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.flow
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.runBlocking
+import kotlinx.coroutines.withTimeout
+import org.junit.After
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import org.junit.rules.Timeout
+import java.util.concurrent.Executors
+import java.util.logging.Logger
+import javax.inject.Inject
+import kotlin.coroutines.cancellation.CancellationException
+
+@HiltAndroidTest
+class SyncAdapterServicesTest {
+
+    lateinit var account: Account
+
+    @Inject
+    lateinit var accountSettingsFactory: AccountSettings.Factory
+
+    @Inject
+    lateinit var collectionRepository: DavCollectionRepository
+
+    @Inject
+    @ApplicationContext
+    lateinit var context: Context
+
+    @Inject
+    lateinit var logger: Logger
+
+    @Inject
+    lateinit var serviceRepository: DavServiceRepository
+
+    @Inject
+    lateinit var syncConditionsFactory: SyncConditions.Factory
+
+    @Inject
+    lateinit var workerFactory: HiltWorkerFactory
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    // test methods should run quickly and not wait 60 seconds for a sync timeout or something like that
+    @get:Rule
+    val timeoutRule: Timeout = Timeout.seconds(5)
+
+
+    @Before
+    fun setUp() {
+        hiltRule.inject()
+
+        account = TestAccountAuthenticator.create()
+
+        // Initialize WorkManager for instrumentation tests.
+        val config = Configuration.Builder()
+            .setMinimumLoggingLevel(Log.DEBUG)
+            .setWorkerFactory(workerFactory)
+            .build()
+        WorkManagerTestInitHelper.initializeTestWorkManager(context, config)
+    }
+
+    @After
+    fun tearDown() {
+        TestAccountAuthenticator.remove(account)
+        unmockkAll()
+    }
+
+
+    private fun syncAdapter(
+        syncWorkerManager: SyncWorkerManager
+    ): SyncAdapterService.SyncAdapter =
+        SyncAdapterService.SyncAdapter(
+            accountSettingsFactory = accountSettingsFactory,
+            collectionRepository = collectionRepository,
+            serviceRepository = serviceRepository,
+            context = context,
+            logger = logger,
+            syncConditionsFactory = syncConditionsFactory,
+            syncWorkerManager = syncWorkerManager
+        )
+
+
+    @Test
+    fun testSyncAdapter_onPerformSync_cancellation() {
+        val syncWorkerManager = mockk<SyncWorkerManager>()
+        val syncAdapter = syncAdapter(syncWorkerManager = syncWorkerManager)
+        val workManager = WorkManager.getInstance(context)
+
+        mockkObject(workManager) {
+            // don't actually create a worker
+            every { syncWorkerManager.enqueueOneTime(any(), any()) } returns "TheSyncWorker"
+
+            // assume worker takes a long time
+            every { workManager.getWorkInfosForUniqueWorkFlow("TheSyncWorker") } just Awaits
+
+            runBlocking {
+                val sync = launch {
+                    syncAdapter.onPerformSync(account, Bundle(), CalendarContract.AUTHORITY, mockk(), SyncResult())
+                }
+
+                // simulate incoming cancellation from sync framework
+                syncAdapter.onSyncCanceled()
+
+                // wait for sync to finish (should happen immediately)
+                sync.join()
+            }
+        }
+    }
+
+    @Test
+    fun testSyncAdapter_onPerformSync_returnsAfterTimeout() {
+        val syncWorkerManager = mockk<SyncWorkerManager>()
+        val syncAdapter = syncAdapter(syncWorkerManager = syncWorkerManager)
+        val workManager = WorkManager.getInstance(context)
+
+        mockkObject(workManager) {
+            // don't actually create a worker
+            every { syncWorkerManager.enqueueOneTime(any(), any()) } returns "TheSyncWorker"
+
+            // assume worker takes a long time
+            every { workManager.getWorkInfosForUniqueWorkFlow("TheSyncWorker") } just Awaits
+
+            mockkStatic("kotlinx.coroutines.TimeoutKt") {   // mock global extension function
+                // immediate timeout (instead of really waiting)
+                coEvery { withTimeout(any<Long>(), any<suspend CoroutineScope.() -> Unit>()) } throws CancellationException("Simulated timeout")
+
+                syncAdapter.onPerformSync(account, Bundle(), CalendarContract.AUTHORITY, mockk(), SyncResult())
+            }
+        }
+    }
+
+    @Test
+    fun testSyncAdapter_onPerformSync_runsInTime() {
+        val syncWorkerManager = mockk<SyncWorkerManager>()
+        val syncAdapter = syncAdapter(syncWorkerManager = syncWorkerManager)
+        val workManager = WorkManager.getInstance(context)
+
+        mockkObject(workManager) {
+            // don't actually create a worker
+            every { syncWorkerManager.enqueueOneTime(any(), any()) } returns "TheSyncWorker"
+
+            // assume worker immediately returns with success
+            val success = mockk<WorkInfo>()
+            every { success.state } returns WorkInfo.State.SUCCEEDED
+            every { workManager.getWorkInfosForUniqueWorkFlow("TheSyncWorker") } returns flow {
+                emit(listOf(success))
+                delay(60000)    // keep the flow active
+            }
+
+            // should just run
+            syncAdapter.onPerformSync(account, Bundle(), CalendarContract.AUTHORITY, mockk(), SyncResult())
+        }
+    }
+
+}

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

@@ -0,0 +1,533 @@
+/*
+ * 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.Context
+import android.util.Log
+import androidx.core.app.NotificationManagerCompat
+import androidx.hilt.work.HiltWorkerFactory
+import androidx.work.Configuration
+import androidx.work.testing.WorkManagerTestInitHelper
+import at.bitfire.dav4jvm.PropStat
+import at.bitfire.dav4jvm.Response
+import at.bitfire.dav4jvm.Response.HrefRelation
+import at.bitfire.dav4jvm.property.webdav.GetETag
+import at.bitfire.davdroid.TestUtils.assertWithin
+import at.bitfire.davdroid.db.Collection
+import at.bitfire.davdroid.db.SyncState
+import at.bitfire.davdroid.network.HttpClient
+import at.bitfire.davdroid.repository.DavSyncStatsRepository
+import at.bitfire.davdroid.settings.AccountSettings
+import at.bitfire.davdroid.sync.account.TestAccountAuthenticator
+import dagger.Module
+import dagger.Provides
+import dagger.hilt.InstallIn
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.android.testing.HiltAndroidRule
+import dagger.hilt.android.testing.HiltAndroidTest
+import dagger.hilt.components.SingletonComponent
+import io.mockk.every
+import io.mockk.mockk
+import okhttp3.Protocol
+import okhttp3.internal.http.StatusLine
+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.assertTrue
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import java.time.Instant
+import javax.inject.Inject
+
+@HiltAndroidTest
+class SyncManagerTest {
+
+    @Module
+    @InstallIn(SingletonComponent::class)
+    object SyncManagerTestModule {
+        @Provides
+        fun davSyncStatsRepository(): DavSyncStatsRepository = mockk<DavSyncStatsRepository>(relaxed = true)
+    }
+
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    @Inject
+    lateinit var accountSettingsFactory: AccountSettings.Factory
+
+    @Inject
+    @ApplicationContext
+    lateinit var context: Context
+
+    @Inject
+    lateinit var syncManagerFactory: TestSyncManager.Factory
+
+    @Inject
+    lateinit var workerFactory: HiltWorkerFactory
+
+    lateinit var account: Account
+    private val server = MockWebServer()
+
+    @Before
+    fun setUp() {
+        hiltRule.inject()
+
+        // Initialize WorkManager for instrumentation tests.
+        val config = Configuration.Builder()
+            .setMinimumLoggingLevel(Log.DEBUG)
+            .setWorkerFactory(workerFactory)
+            .build()
+        WorkManagerTestInitHelper.initializeTestWorkManager(context, config)
+
+        account = TestAccountAuthenticator.create()
+
+        server.start()
+    }
+
+    @After
+    fun tearDown() {
+        TestAccountAuthenticator.remove(account)
+
+        // clear annoying syncError notifications
+        NotificationManagerCompat.from(context).cancelAll()
+
+        server.close()
+    }
+
+
+    @Test
+    fun testGetDelayUntil_defaultOnNull() {
+        val now = Instant.now()
+        val delayUntil = SyncManager.getDelayUntil(null).epochSecond
+        val default = now.plusSeconds(SyncManager.DELAY_UNTIL_DEFAULT).epochSecond
+        assertWithin(default, delayUntil, 5)
+    }
+
+    @Test
+    fun testGetDelayUntil_reducesToMax() {
+        val now = Instant.now()
+        val delayUntil = SyncManager.getDelayUntil(now.plusSeconds(10*24*60*60)).epochSecond
+        val max = now.plusSeconds(SyncManager.DELAY_UNTIL_MAX).epochSecond
+        assertWithin(max, delayUntil, 5)
+    }
+
+    @Test
+    fun testGetDelayUntil_increasesToMin() {
+        val delayUntil = SyncManager.getDelayUntil(Instant.EPOCH).epochSecond
+        val min = Instant.now().plusSeconds(SyncManager.DELAY_UNTIL_MIN).epochSecond
+        assertWithin(min, delayUntil, 5)
+    }
+
+
+    private fun queryCapabilitiesResponse(cTag: String? = null): MockResponse {
+        val body = StringBuilder()
+        body.append(
+            "<?xml version=\"1.0\" encoding=\"utf-8\" ?>\n" +
+                    "<multistatus xmlns=\"DAV:\" xmlns:CALDAV=\"http://calendarserver.org/ns/\">\n" +
+                    "  <response>\n" +
+                    "    <href>/</href>\n" +
+                    "    <propstat>\n" +
+                    "      <prop>\n"
+        )
+        if (cTag != null)
+            body.append("<CALDAV:getctag>$cTag</CALDAV:getctag>\n")
+        body.append(
+            "      </prop>\n" +
+                    "    </propstat>\n" +
+                    "  </response>\n" +
+                    "</multistatus>"
+        )
+        return MockResponse()
+            .setResponseCode(207)
+            .setHeader("Content-Type", "text/xml")
+            .setBody(body.toString())
+    }
+
+    @Test
+    fun testPerformSync_503RetryAfter_DelaySeconds() {
+        server.enqueue(MockResponse()
+            .setResponseCode(503)
+            .setHeader("Retry-After", "60"))    // 60 seconds
+
+        val result = SyncResult()
+        val syncManager = syncManager(LocalTestCollection(), result)
+        syncManager.performSync()
+
+        val expected = Instant.now()
+            .plusSeconds(60)
+            .toEpochMilli()
+        // 5 sec tolerance for test
+        assertWithin(expected, result.delayUntil*1000, 5000)
+    }
+
+    @Test
+    fun testPerformSync_FirstSync_Empty() {
+        val collection = LocalTestCollection() /* no last known ctag */
+        server.enqueue(queryCapabilitiesResponse())
+
+        val syncManager = syncManager(collection)
+        syncManager.performSync()
+
+        assertFalse(syncManager.didGenerateUpload)
+        assertTrue(syncManager.didListAllRemote)
+        assertFalse(syncManager.didDownloadRemote)
+        assertFalse(syncManager.syncResult.hasError())
+        assertTrue(collection.entries.isEmpty())
+    }
+
+    @Test
+    fun testPerformSync_UploadNewMember_ETagOnPut() {
+        val collection = LocalTestCollection().apply {
+            lastSyncState = SyncState(SyncState.Type.CTAG, "old-ctag")
+            entries += LocalTestResource().apply {
+                dirty = true
+            }
+        }
+        server.enqueue(queryCapabilitiesResponse("ctag1"))
+
+        // PUT -> 204 No Content
+        server.enqueue(MockResponse()
+                .setResponseCode(204)
+                .setHeader("ETag", "etag-from-put"))
+
+        // modifications sent, so DAVx5 will query CTag again
+        server.enqueue(queryCapabilitiesResponse("ctag2"))
+
+        val syncManager = syncManager(collection).apply {
+            listAllRemoteResult = listOf(
+                    Pair(Response(
+                            server.url("/"),
+                            server.url("/generated-file.txt"),
+                            null,
+                            listOf(PropStat(
+                                    listOf(
+                                            GetETag("\"etag-from-put\"")
+                                    ),
+                                    StatusLine(Protocol.HTTP_1_1, 200, "OK")
+                            )
+                            )), HrefRelation.MEMBER)
+            )
+        }
+        syncManager.performSync()
+
+        assertTrue(syncManager.didGenerateUpload)
+        assertTrue(syncManager.didListAllRemote)
+        assertFalse(syncManager.didDownloadRemote)
+        assertFalse(syncManager.syncResult.hasError())
+        assertEquals(1, collection.entries.size)
+        assertEquals("etag-from-put", collection.entries.first().eTag)
+    }
+
+    @Test
+    fun testPerformSync_UploadModifiedMember_ETagOnPut() {
+        val collection = LocalTestCollection().apply {
+            lastSyncState = SyncState(SyncState.Type.CTAG, "old-ctag")
+            entries += LocalTestResource().apply {
+                fileName = "existing-file.txt"
+                eTag = "old-etag-like-on-server"
+                dirty = true
+            }
+        }
+        server.enqueue(queryCapabilitiesResponse("ctag1"))
+
+        // PUT -> 204 No Content
+        server.enqueue(MockResponse()
+                .setResponseCode(204)
+                .addHeader("ETag", "etag-from-put"))
+
+        // modifications sent, so DAVx5 will query CTag again
+        server.enqueue(queryCapabilitiesResponse("ctag2"))
+
+        val syncManager = syncManager(collection).apply {
+            listAllRemoteResult = listOf(
+                    Pair(Response(
+                            server.url("/"),
+                            server.url("/existing-file.txt"),
+                            null,
+                            listOf(PropStat(
+                                    listOf(
+                                            GetETag("etag-from-put")
+                                    ),
+                                    StatusLine(Protocol.HTTP_1_1, 200, "OK")
+                            )
+                            )), HrefRelation.MEMBER)
+            )
+
+            assertDownloadRemote = mapOf(Pair(server.url("/existing-file.txt"), "etag-from-put"))
+        }
+        syncManager.performSync()
+
+        assertTrue(syncManager.didGenerateUpload)
+        assertTrue(syncManager.didListAllRemote)
+        assertFalse(syncManager.didDownloadRemote)
+        assertFalse(syncManager.syncResult.hasError())
+        assertEquals(1, collection.entries.size)
+        assertEquals("etag-from-put", collection.entries.first().eTag)
+    }
+
+    @Test
+    fun testPerformSync_UploadModifiedMember_NoETagOnPut() {
+        val collection = LocalTestCollection().apply {
+            lastSyncState = SyncState(SyncState.Type.CTAG, "old-ctag")
+            entries += LocalTestResource().apply {
+                fileName = "existing-file.txt"
+                eTag = "old-etag-like-on-server"
+                dirty = true
+            }
+        }
+        server.enqueue(queryCapabilitiesResponse("ctag1"))
+
+        // PUT -> 204 No Content
+        server.enqueue(MockResponse().setResponseCode(204))
+
+        // modifications sent, so DAVx5 will query CTag again
+        server.enqueue(queryCapabilitiesResponse("ctag2"))
+
+        val syncManager = syncManager(collection).apply {
+            listAllRemoteResult = listOf(
+                    Pair(Response(
+                            server.url("/"),
+                            server.url("/existing-file.txt"),
+                            null,
+                            listOf(PropStat(
+                                    listOf(
+                                            GetETag("etag-from-propfind")
+                                    ),
+                                    StatusLine(Protocol.HTTP_1_1, 200, "OK")
+                            )
+                            )), HrefRelation.MEMBER)
+            )
+
+            assertDownloadRemote = mapOf(Pair(server.url("/existing-file.txt"), "etag-from-propfind"))
+        }
+        syncManager.performSync()
+
+        assertTrue(syncManager.didGenerateUpload)
+        assertTrue(syncManager.didListAllRemote)
+        assertTrue(syncManager.didDownloadRemote)
+        assertFalse(syncManager.syncResult.hasError())
+        assertEquals(1, collection.entries.size)
+        assertEquals("etag-from-propfind", collection.entries.first().eTag)
+    }
+
+    @Test
+    fun testPerformSync_UploadModifiedMember_412PreconditionFailed() {
+        val collection = LocalTestCollection().apply {
+            lastSyncState = SyncState(SyncState.Type.CTAG, "old-ctag")
+            entries += LocalTestResource().apply {
+                fileName = "existing-file.txt"
+                eTag = "etag-that-has-been-changed-on-server-in-the-meanwhile"
+                dirty = true
+            }
+        }
+        server.enqueue(queryCapabilitiesResponse("ctag1"))
+
+        // PUT -> 412 Precondition Failed
+        server.enqueue(MockResponse()
+                .setResponseCode(412))
+
+        // modifications sent, so DAVx5 will query CTag again
+        server.enqueue(queryCapabilitiesResponse("ctag1"))
+
+        val syncManager = syncManager(collection).apply {
+            listAllRemoteResult = listOf(
+                    Pair(Response(
+                            server.url("/"),
+                            server.url("/existing-file.txt"),
+                            null,
+                            listOf(PropStat(
+                                    listOf(
+                                            GetETag("changed-etag-from-server")
+                                    ),
+                                    StatusLine(Protocol.HTTP_1_1, 200, "OK")
+                            )
+                            )), HrefRelation.MEMBER)
+            )
+
+            assertDownloadRemote = mapOf(Pair(server.url("/existing-file.txt"), "changed-etag-from-server"))
+        }
+        syncManager.performSync()
+
+        assertTrue(syncManager.didGenerateUpload)
+        assertTrue(syncManager.didListAllRemote)
+        assertTrue(syncManager.didDownloadRemote)
+        assertFalse(syncManager.syncResult.hasError())
+        assertEquals(1, collection.entries.size)
+        assertEquals("changed-etag-from-server", collection.entries.first().eTag)
+    }
+
+    @Test
+    fun testPerformSync_NoopOnMemberWithSameETag() {
+        val collection = LocalTestCollection().apply {
+            lastSyncState = SyncState(SyncState.Type.CTAG, "ctag1")
+            entries += LocalTestResource().apply {
+                fileName = "downloaded-member.txt"
+                eTag = "MemberETag1"
+            }
+        }
+        server.enqueue(queryCapabilitiesResponse("ctag2"))
+
+        val syncManager = syncManager(collection).apply {
+            listAllRemoteResult = listOf(
+                    Pair(Response(
+                            server.url("/"),
+                            server.url("/downloaded-member.txt"),
+                            null,
+                            listOf(PropStat(
+                                    listOf(
+                                            GetETag("\"MemberETag1\"")
+                                    ),
+                                    StatusLine(Protocol.HTTP_1_1, 200, "OK")
+                            )
+                            )), HrefRelation.MEMBER)
+            )
+
+        }
+        syncManager.performSync()
+
+        assertFalse(syncManager.didGenerateUpload)
+        assertTrue(syncManager.didListAllRemote)
+        assertFalse(syncManager.didDownloadRemote)
+        assertFalse(syncManager.syncResult.hasError())
+        assertEquals(1, collection.entries.size)
+        assertEquals("MemberETag1", collection.entries.first().eTag)
+    }
+
+    @Test
+    fun testPerformSync_DownloadNewMember() {
+        val collection = LocalTestCollection().apply {
+            lastSyncState = SyncState(SyncState.Type.CTAG, "old-ctag")
+        }
+        server.enqueue(queryCapabilitiesResponse(cTag = "new-ctag"))
+
+        val syncManager = syncManager(collection).apply {
+            listAllRemoteResult = listOf(
+                    Pair(Response(
+                            server.url("/"),
+                            server.url("/new-member.txt"),
+                            null,
+                            listOf(PropStat(
+                                    listOf(
+                                            GetETag("\"NewMemberETag1\"")
+                                    ),
+                                    StatusLine(Protocol.HTTP_1_1, 200, "OK")
+                            )
+                    )), HrefRelation.MEMBER)
+            )
+
+            assertDownloadRemote = mapOf(Pair(server.url("/new-member.txt"), "NewMemberETag1"))
+        }
+        syncManager.performSync()
+
+        assertFalse(syncManager.didGenerateUpload)
+        assertTrue(syncManager.didListAllRemote)
+        assertTrue(syncManager.didDownloadRemote)
+        assertFalse(syncManager.syncResult.hasError())
+        assertEquals(1, collection.entries.size)
+        assertEquals("NewMemberETag1", collection.entries.first().eTag)
+    }
+
+    @Test
+    fun testPerformSync_DownloadUpdatedMember() {
+        val collection = LocalTestCollection().apply {
+            lastSyncState = SyncState(SyncState.Type.CTAG, "old-ctag")
+            entries += LocalTestResource().apply {
+                fileName = "downloaded-member.txt"
+                eTag = "MemberETag1"
+            }
+        }
+        server.enqueue(queryCapabilitiesResponse(cTag = "new-ctag"))
+
+        val syncManager = syncManager(collection).apply {
+            listAllRemoteResult = listOf(
+                    Pair(Response(
+                            server.url("/"),
+                            server.url("/downloaded-member.txt"),
+                            null,
+                            listOf(PropStat(
+                                    listOf(
+                                            GetETag("\"MemberETag2\"")
+                                    ),
+                                    StatusLine(Protocol.HTTP_1_1, 200, "OK")
+                            )
+                            )), HrefRelation.MEMBER)
+            )
+
+            assertDownloadRemote = mapOf(Pair(server.url("/downloaded-member.txt"), "MemberETag2"))
+        }
+        syncManager.performSync()
+
+        assertFalse(syncManager.didGenerateUpload)
+        assertTrue(syncManager.didListAllRemote)
+        assertTrue(syncManager.didDownloadRemote)
+        assertFalse(syncManager.syncResult.hasError())
+        assertEquals(1, collection.entries.size)
+        assertEquals("MemberETag2", collection.entries.first().eTag)
+    }
+
+    @Test
+    fun testPerformSync_RemoveVanishedMember() {
+        val collection = LocalTestCollection().apply {
+            lastSyncState = SyncState(SyncState.Type.CTAG, "old-ctag")
+            entries += LocalTestResource().apply {
+                fileName = "downloaded-member.txt"
+            }
+        }
+        server.enqueue(queryCapabilitiesResponse(cTag = "new-ctag"))
+
+        val syncManager = syncManager(collection)
+        syncManager.performSync()
+
+        assertFalse(syncManager.didGenerateUpload)
+        assertTrue(syncManager.didListAllRemote)
+        assertFalse(syncManager.didDownloadRemote)
+        assertFalse(syncManager.syncResult.hasError())
+        assertTrue(collection.entries.isEmpty())
+    }
+
+    @Test
+    fun testPerformSync_CTagDidntChange() {
+        val collection = LocalTestCollection().apply {
+            lastSyncState = SyncState(SyncState.Type.CTAG, "ctag1")
+        }
+        server.enqueue(queryCapabilitiesResponse("ctag1"))
+
+        val syncManager = syncManager(collection)
+        syncManager.performSync()
+
+        assertFalse(syncManager.didGenerateUpload)
+        assertFalse(syncManager.didListAllRemote)
+        assertFalse(syncManager.didDownloadRemote)
+        assertFalse(syncManager.syncResult.hasError())
+        assertTrue(collection.entries.isEmpty())
+    }
+
+
+    // helpers
+
+    private fun syncManager(
+        localCollection: LocalTestCollection,
+        syncResult: SyncResult = SyncResult(),
+        collection: Collection = mockk<Collection>() {
+            every { id } returns 1
+            every { url } returns server.url("/")
+        }
+    ) = syncManagerFactory.create(
+        account,
+        accountSettingsFactory.create(account),
+        arrayOf(),
+        "TestAuthority",
+        HttpClient.Builder(context).build(),
+        syncResult,
+        localCollection,
+        collection
+    )
+
+}

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

@@ -0,0 +1,206 @@
+/*
+ * 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 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/TestSyncManager.kt

@@ -0,0 +1,127 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.sync
+
+import android.accounts.Account
+import at.bitfire.dav4jvm.DavCollection
+import at.bitfire.dav4jvm.MultiResponseCallback
+import at.bitfire.dav4jvm.Response
+import at.bitfire.dav4jvm.property.caldav.GetCTag
+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.settings.AccountSettings
+import at.bitfire.davdroid.util.DavUtils.lastSegment
+import dagger.assisted.Assisted
+import dagger.assisted.AssistedFactory
+import dagger.assisted.AssistedInject
+import okhttp3.HttpUrl
+import okhttp3.RequestBody
+import okhttp3.RequestBody.Companion.toRequestBody
+import org.junit.Assert.assertEquals
+
+class TestSyncManager @AssistedInject constructor(
+    @Assisted account: Account,
+    @Assisted accountSettings: AccountSettings,
+    @Assisted extras: Array<String>,
+    @Assisted authority: String,
+    @Assisted httpClient: HttpClient,
+    @Assisted syncResult: SyncResult,
+    @Assisted localCollection: LocalTestCollection,
+    @Assisted collection: Collection
+): SyncManager<LocalTestResource, LocalTestCollection, DavCollection>(
+    account,
+    accountSettings,
+    httpClient,
+    extras,
+    authority,
+    syncResult,
+    localCollection,
+    collection
+) {
+
+    @AssistedFactory
+    interface Factory {
+        fun create(
+            account: Account,
+            accountSettings: AccountSettings,
+            extras: Array<String>,
+            authority: String,
+            httpClient: HttpClient,
+            syncResult: SyncResult,
+            localCollection: LocalTestCollection,
+            collection: Collection
+        ): TestSyncManager
+    }
+
+    override fun prepare(): Boolean {
+        davCollection = DavCollection(httpClient.okHttpClient, collection.url)
+        return true
+    }
+
+    var didQueryCapabilities = false
+    override fun queryCapabilities(): SyncState? {
+        if (didQueryCapabilities)
+            throw IllegalStateException("queryCapabilities() must not be called twice")
+        didQueryCapabilities = true
+
+        var cTag: SyncState? = null
+        davCollection.propfind(0, GetCTag.NAME) { response, rel ->
+            if (rel == Response.HrefRelation.SELF)
+                response[GetCTag::class.java]?.cTag?.let {
+                    cTag = SyncState(SyncState.Type.CTAG, it)
+                }
+        }
+
+        return cTag
+    }
+
+    var didGenerateUpload = false
+    override fun generateUpload(resource: LocalTestResource): RequestBody {
+        didGenerateUpload = true
+        return resource.toString().toRequestBody()
+    }
+
+    override fun syncAlgorithm() = SyncAlgorithm.PROPFIND_REPORT
+
+    var listAllRemoteResult = emptyList<Pair<Response, Response.HrefRelation>>()
+    var didListAllRemote = false
+    override fun listAllRemote(callback: MultiResponseCallback) {
+        if (didListAllRemote)
+            throw IllegalStateException("listAllRemote() must not be called twice")
+        didListAllRemote = true
+        for (result in listAllRemoteResult)
+            callback.onResponse(result.first, result.second)
+    }
+
+    var assertDownloadRemote = emptyMap<HttpUrl, String>()
+    var didDownloadRemote = false
+    override fun downloadRemote(bunch: List<HttpUrl>) {
+        didDownloadRemote = true
+        assertEquals(assertDownloadRemote.keys.toList(), bunch)
+
+        for ((url, eTag) in assertDownloadRemote) {
+            val fileName = url.lastSegment
+            var localEntry = localCollection.entries.firstOrNull { it.fileName == fileName }
+            if (localEntry == null) {
+                val newEntry = LocalTestResource().also {
+                    it.fileName = fileName
+                }
+                localCollection.entries += newEntry
+                localEntry = newEntry
+            }
+            localEntry.eTag = eTag
+            localEntry.flags = LocalResource.FLAG_REMOTELY_PRESENT
+        }
+    }
+
+    override fun postProcess() {
+    }
+
+    override fun notifyInvalidResourceTitle() =
+        throw NotImplementedError()
+
+}

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

@@ -0,0 +1,67 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.sync.account
+
+import android.accounts.Account
+import android.accounts.AccountManager
+import android.content.Context
+import android.os.Bundle
+import androidx.test.platform.app.InstrumentationRegistry
+import at.bitfire.davdroid.settings.SettingsManager
+import at.bitfire.davdroid.test.R
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.android.testing.HiltAndroidRule
+import dagger.hilt.android.testing.HiltAndroidTest
+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 AccountUtilsTest {
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    @Inject
+    @ApplicationContext
+    lateinit var context: Context
+    val testContext = InstrumentationRegistry.getInstrumentation().context
+
+    @Inject
+    lateinit var settingsManager: SettingsManager
+
+    val account = Account(
+        "AccountUtilsTest",
+        testContext.getString(R.string.account_type_test)
+    )
+
+    @Before
+    fun setUp() {
+        hiltRule.inject()
+    }
+
+
+    @Test
+    fun testCreateAccount() {
+        val userData = Bundle(2)
+        userData.putString("int", "1")
+        userData.putString("string", "abc/\"-")
+
+        val manager = AccountManager.get(context)
+        try {
+            assertTrue(SystemAccountUtils.createAccount(context, account, userData))
+
+            // validate user data
+            assertEquals("1", manager.getUserData(account, "int"))
+            assertEquals("abc/\"-", manager.getUserData(account, "string"))
+        } finally {
+            assertTrue(manager.removeAccountExplicitly(account))
+        }
+    }
+
+}

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

@@ -0,0 +1,152 @@
+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

@@ -0,0 +1,96 @@
+/***************************************************************************************************
+ * 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/kotlin/at/bitfire/davdroid/sync/worker/PeriodicSyncWorkerTest.kt

@@ -0,0 +1,103 @@
+/***************************************************************************************************
+ * 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.Context
+import android.provider.CalendarContract
+import android.util.Log
+import androidx.test.platform.app.InstrumentationRegistry
+import androidx.work.Configuration
+import androidx.work.ListenableWorker
+import androidx.work.WorkManager
+import androidx.work.WorkerFactory
+import androidx.work.WorkerParameters
+import androidx.work.testing.TestListenableWorkerBuilder
+import androidx.work.testing.WorkManagerTestInitHelper
+import androidx.work.workDataOf
+import at.bitfire.davdroid.sync.account.TestAccountAuthenticator
+import at.bitfire.davdroid.test.R
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.android.testing.HiltAndroidRule
+import dagger.hilt.android.testing.HiltAndroidTest
+import io.mockk.mockkObject
+import io.mockk.verify
+import kotlinx.coroutines.runBlocking
+import org.junit.After
+import org.junit.Assert.assertTrue
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import javax.inject.Inject
+
+@HiltAndroidTest
+class PeriodicSyncWorkerTest {
+
+    @Inject
+    @ApplicationContext
+    lateinit var context: Context
+    val testContext = InstrumentationRegistry.getInstrumentation().context
+
+    @Inject
+    lateinit var syncWorkerFactory: PeriodicSyncWorker.Factory
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    lateinit var account: Account
+
+    @Before
+    fun setUp() {
+        hiltRule.inject()
+
+        // Initialize WorkManager for instrumentation tests.
+        val config = Configuration.Builder()
+            .setMinimumLoggingLevel(Log.DEBUG)
+            .build()
+        WorkManagerTestInitHelper.initializeTestWorkManager(context, config)
+
+        account = TestAccountAuthenticator.create()
+    }
+
+    @After
+    fun tearDown() {
+        TestAccountAuthenticator.remove(account)
+    }
+
+
+    @Test
+    fun doWork_cancelsItselfOnInvalidAccount() {
+        val invalidAccount = Account("invalid", testContext.getString(R.string.account_type_test))
+
+        // Run PeriodicSyncWorker as TestWorker
+        val inputData = workDataOf(
+            BaseSyncWorker.INPUT_AUTHORITY to CalendarContract.AUTHORITY,
+            BaseSyncWorker.INPUT_ACCOUNT_NAME to invalidAccount.name,
+            BaseSyncWorker.INPUT_ACCOUNT_TYPE to invalidAccount.type
+        )
+
+        // mock WorkManager to observe cancellation call
+        val workManager = WorkManager.getInstance(context)
+        mockkObject(workManager)
+
+        // run test worker, expect failure
+        val testWorker = TestListenableWorkerBuilder<PeriodicSyncWorker>(context, inputData)
+            .setWorkerFactory(object: WorkerFactory() {
+                override fun createWorker(appContext: Context, workerClassName: String, workerParameters: WorkerParameters) =
+                    syncWorkerFactory.create(appContext, workerParameters)
+            })
+            .build()
+        val result = runBlocking {
+            testWorker.doWork()
+        }
+        assertTrue(result is ListenableWorker.Result.Failure)
+
+        // verify that worker called WorkManager.cancelWorkById(<its ID>)
+        verify {
+            workManager.cancelWorkById(testWorker.id)
+        }
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/sync/worker/SyncConditionsTest.kt

@@ -0,0 +1,280 @@
+/*
+ * 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.Context
+import android.net.ConnectivityManager
+import android.net.Network
+import android.net.NetworkCapabilities
+import android.net.NetworkCapabilities.NET_CAPABILITY_INTERNET
+import android.net.NetworkCapabilities.NET_CAPABILITY_NOT_VPN
+import android.net.NetworkCapabilities.NET_CAPABILITY_VALIDATED
+import android.net.NetworkCapabilities.TRANSPORT_WIFI
+import android.net.wifi.WifiInfo
+import android.net.wifi.WifiManager
+import androidx.core.content.getSystemService
+import at.bitfire.davdroid.settings.AccountSettings
+import at.bitfire.davdroid.sync.SyncConditions
+import at.bitfire.davdroid.util.PermissionUtils
+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.impl.annotations.MockK
+import io.mockk.junit4.MockKRule
+import io.mockk.mockk
+import io.mockk.mockkObject
+import io.mockk.spyk
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import javax.inject.Inject
+
+@HiltAndroidTest
+class SyncConditionsTest {
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    @get:Rule
+    val mockkRule = MockKRule(this)
+
+    @MockK
+    lateinit var capabilities: NetworkCapabilities
+
+    @Inject
+    @ApplicationContext
+    lateinit var context: Context
+
+    @Inject
+    lateinit var factory: SyncConditions.Factory
+
+    @MockK
+    lateinit var network1: Network
+
+    @MockK
+    lateinit var network2: Network
+
+
+    private lateinit var accountSettings: AccountSettings
+
+    private lateinit var conditions: SyncConditions
+
+    private lateinit var connectivityManager: ConnectivityManager
+
+    @Before
+    fun setup() {
+        hiltRule.inject()
+
+        // prepare accountSettings with some necessary data
+        accountSettings = mockk<AccountSettings> {
+            every { account } returns Account("test", "test")
+            every { getIgnoreVpns() } returns false     // default value
+        }
+
+        conditions = factory.create(accountSettings)
+
+        connectivityManager = context.getSystemService<ConnectivityManager>()!!.also { cm ->
+            mockkObject(cm)
+            every { cm.allNetworks } returns arrayOf(network1, network2)
+            every { cm.getNetworkInfo(network1) } returns mockk()
+            every { cm.getNetworkInfo(network2) } returns mockk()
+            every { cm.getNetworkCapabilities(network1) } returns capabilities
+            every { cm.getNetworkCapabilities(network2) } returns capabilities
+        }
+    }
+
+
+    @Test
+    fun testCorrectWifiSsid_CorrectWiFiSsid() {
+        every { accountSettings.getSyncWifiOnlySSIDs() } returns listOf("SampleWiFi1","ConnectedWiFi")
+
+        mockkObject(PermissionUtils)
+        every { PermissionUtils.canAccessWifiSsid(any()) } returns true
+
+        val wifiManager = context.getSystemService<WifiManager>()!!
+        mockkObject(wifiManager)
+        every { wifiManager.connectionInfo } returns spyk<WifiInfo>().apply {
+            every { ssid } returns "ConnectedWiFi"
+        }
+
+        assertTrue(conditions.correctWifiSsid())
+    }
+
+    @Test
+    fun testCorrectWifiSsid_WrongWiFiSsid() {
+        every { accountSettings.getSyncWifiOnlySSIDs() } returns listOf("SampleWiFi1","SampleWiFi2")
+
+        mockkObject(PermissionUtils)
+        every { PermissionUtils.canAccessWifiSsid(any()) } returns true
+
+        val wifiManager = context.getSystemService<WifiManager>()!!
+        mockkObject(wifiManager)
+        every { wifiManager.connectionInfo } returns spyk<WifiInfo>().apply {
+            every { ssid } returns "ConnectedWiFi"
+        }
+
+        assertFalse(conditions.correctWifiSsid())
+    }
+
+
+    @Test
+    fun testInternetAvailable_capabilitiesNull() {
+        every { connectivityManager.getNetworkCapabilities(network1) } returns null
+        every { connectivityManager.getNetworkCapabilities(network2) } returns null
+        assertFalse(conditions.internetAvailable())
+    }
+
+    @Test
+    fun testInternetAvailable_Internet() {
+        every { capabilities.hasCapability(NET_CAPABILITY_INTERNET) } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_VALIDATED) } returns false
+        assertFalse(conditions.internetAvailable())
+    }
+
+    @Test
+    fun testInternetAvailable_Validated() {
+        every { capabilities.hasCapability(NET_CAPABILITY_INTERNET) } returns false
+        every { capabilities.hasCapability(NET_CAPABILITY_VALIDATED) } returns true
+        assertFalse(conditions.internetAvailable())
+    }
+
+    @Test
+    fun testInternetAvailable_InternetValidated() {
+        every { capabilities.hasCapability(NET_CAPABILITY_INTERNET) } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_VALIDATED) } returns true
+        assertTrue(conditions.internetAvailable())
+    }
+
+    @Test
+    fun testInternetAvailable_ignoreVpns() {
+        every { accountSettings.getIgnoreVpns() } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_INTERNET) } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_VALIDATED) } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_NOT_VPN) } returns false
+        assertFalse(conditions.internetAvailable())
+    }
+
+    @Test
+    fun testInternetAvailable_ignoreVpns_NotVpn() {
+        every { accountSettings.getIgnoreVpns() } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_INTERNET) } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_VALIDATED) } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_NOT_VPN) } returns true
+        assertTrue(conditions.internetAvailable())
+    }
+
+    @Test
+    fun testInternetAvailable_twoConnectionsFirstOneWithoutInternet() {
+        // The real case that failed in davx5-ose#395 is that the connection list contains (in this order)
+        // 1. a mobile network without INTERNET, but with VALIDATED
+        // 2. a WiFi network with INTERNET and VALIDATED
+
+        // The "return false" of hasINTERNET will trigger at the first connection, the
+        // "andThen true" will trigger for the second connection
+        every { capabilities.hasCapability(NET_CAPABILITY_INTERNET) } returns false andThen true
+        every { capabilities.hasCapability(NET_CAPABILITY_VALIDATED) } returns true
+
+        // There is an internet connection if any(!) connection has both INTERNET and VALIDATED.
+        assertTrue(conditions.internetAvailable())
+    }
+
+    @Test
+    fun testInternetAvailable_twoConnectionsFirstOneWithoutValidated() {
+        every { capabilities.hasCapability(NET_CAPABILITY_INTERNET) } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_VALIDATED) } returns false andThen true
+        assertTrue(conditions.internetAvailable())
+    }
+
+    @Test
+    fun testInternetAvailable_twoConnectionsFirstOneWithoutNotVpn() {
+        every { accountSettings.getIgnoreVpns() } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_INTERNET) } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_VALIDATED) } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_NOT_VPN) } returns false andThen true
+        assertTrue(conditions.internetAvailable())
+    }
+    
+
+    @Test
+    fun testWifiAvailable_capabilitiesNull() {
+        every { connectivityManager.getNetworkCapabilities(network1) } returns null
+        every { connectivityManager.getNetworkCapabilities(network2) } returns null
+        assertFalse(conditions.wifiAvailable())
+    }
+
+    @Test
+    fun testWifiAvailable() {
+        every { capabilities.hasTransport(TRANSPORT_WIFI) } returns false
+        every { capabilities.hasCapability(NET_CAPABILITY_VALIDATED) } returns false
+        assertFalse(conditions.wifiAvailable())
+    }
+
+    @Test
+    fun testWifiAvailable_wifi() {
+        every { capabilities.hasTransport(TRANSPORT_WIFI) } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_VALIDATED) } returns false
+        assertFalse(conditions.wifiAvailable())
+    }
+
+    @Test
+    fun testWifiAvailable_validated() {
+        every { capabilities.hasTransport(TRANSPORT_WIFI) } returns false
+        every { capabilities.hasCapability(NET_CAPABILITY_VALIDATED) } returns true
+        assertFalse(conditions.wifiAvailable())
+    }
+
+    @Test
+    fun testWifiAvailable_wifiValidated() {
+        every { capabilities.hasTransport(TRANSPORT_WIFI) } returns true
+        every { capabilities.hasCapability(NET_CAPABILITY_VALIDATED) } returns true
+        assertTrue(conditions.wifiAvailable())
+    }
+
+
+    @Test
+    fun testWifiConditionsMet_withoutWifi() {
+        // "Sync only over Wi-Fi" is disabled
+        every { accountSettings.getSyncWifiOnly() } returns false
+
+        assertTrue(factory.create(accountSettings).wifiConditionsMet())
+    }
+
+    @Test
+    fun testWifiConditionsMet_anyWifi_wifiEnabled() {
+        // "Sync only over Wi-Fi" is enabled
+        every { accountSettings.getSyncWifiOnly() } returns true
+
+        // Wi-Fi is available
+        mockkObject(conditions) {
+            // Wi-Fi is available
+            every { conditions.wifiAvailable() } returns true
+
+            // Wi-Fi SSID is correct
+            every { conditions.correctWifiSsid() } returns true
+
+            assertTrue(conditions.wifiConditionsMet())
+        }
+    }
+
+    @Test
+    fun testWifiConditionsMet_anyWifi_wifiDisabled() {
+        // "Sync only over Wi-Fi" is enabled
+        every { accountSettings.getSyncWifiOnly() } returns true
+
+        mockkObject(conditions) {
+            // Wi-Fi is not available
+            every { conditions.wifiAvailable() } returns false
+
+            // Wi-Fi SSID is correct
+            every { conditions.correctWifiSsid() } returns true
+
+            assertFalse(conditions.wifiConditionsMet())
+        }
+    }
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/sync/worker/SyncWorkerManagerTest.kt

@@ -0,0 +1,99 @@
+/*
+ * 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.Context
+import android.provider.CalendarContract
+import android.util.Log
+import androidx.hilt.work.HiltWorkerFactory
+import androidx.work.Configuration
+import androidx.work.testing.WorkManagerTestInitHelper
+import at.bitfire.davdroid.TestUtils
+import at.bitfire.davdroid.TestUtils.workScheduledOrRunning
+import at.bitfire.davdroid.sync.account.TestAccountAuthenticator
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.android.testing.HiltAndroidRule
+import dagger.hilt.android.testing.HiltAndroidTest
+import org.junit.After
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import javax.inject.Inject
+
+@HiltAndroidTest
+class SyncWorkerManagerTest {
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    @Inject
+    @ApplicationContext
+    lateinit var context: Context
+
+    @Inject
+    lateinit var syncWorkerManager: SyncWorkerManager
+
+    @Inject
+    lateinit var workerFactory: HiltWorkerFactory
+
+    lateinit var account: Account
+
+    @Before
+    fun setUp() {
+        hiltRule.inject()
+
+        // Initialize WorkManager for instrumentation tests.
+        val config = Configuration.Builder()
+            .setMinimumLoggingLevel(Log.DEBUG)
+            .setWorkerFactory(workerFactory)
+            .build()
+        WorkManagerTestInitHelper.initializeTestWorkManager(context, config)
+
+        account = TestAccountAuthenticator.create()
+    }
+
+    @After
+    fun tearDown() {
+        TestAccountAuthenticator.remove(account)
+    }
+
+
+    // one-time sync workers
+
+    @Test
+    fun testEnqueueOneTime() {
+        val workerName = OneTimeSyncWorker.workerName(account, CalendarContract.AUTHORITY)
+        assertFalse(TestUtils.workScheduledOrRunningOrSuccessful(context, workerName))
+
+        val returnedName = syncWorkerManager.enqueueOneTime(account, CalendarContract.AUTHORITY)
+        assertEquals(workerName, returnedName)
+        assertTrue(TestUtils.workScheduledOrRunningOrSuccessful(context, workerName))
+    }
+
+
+    // periodic sync workers
+
+    @Test
+    fun enablePeriodic() {
+        syncWorkerManager.enablePeriodic(account, CalendarContract.AUTHORITY, 60, false).result.get()
+
+        val workerName = PeriodicSyncWorker.workerName(account, CalendarContract.AUTHORITY)
+        assertTrue(workScheduledOrRunning(context, workerName))
+    }
+
+    @Test
+    fun disablePeriodic() {
+        syncWorkerManager.enablePeriodic(account, CalendarContract.AUTHORITY, 60, false).result.get()
+        syncWorkerManager.disablePeriodic(account, CalendarContract.AUTHORITY).result.get()
+
+        val workerName = PeriodicSyncWorker.workerName(account, CalendarContract.AUTHORITY)
+        assertFalse(workScheduledOrRunning(context, workerName))
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/ui/DebugInfoActivityTest.kt

@@ -0,0 +1,37 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.ui
+
+import androidx.test.platform.app.InstrumentationRegistry
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class DebugInfoActivityTest {
+
+    @Test
+    fun testIntentBuilder_LargeLocalResource() {
+        val a = 'A'.code.toByte()
+        val intent = DebugInfoActivity.IntentBuilder(InstrumentationRegistry.getInstrumentation().context)
+            .withLocalResource(String(ByteArray(1024*1024) { a }))
+            .build()
+        val expected = StringBuilder(DebugInfoActivity.IntentBuilder.MAX_ELEMENT_SIZE)
+        expected.append(String(ByteArray(DebugInfoActivity.IntentBuilder.MAX_ELEMENT_SIZE - 3) { a }))
+        expected.append("...")
+        assertEquals(expected.toString(), intent.getStringExtra("localResource"))
+    }
+
+    @Test
+    fun testIntentBuilder_LargeLogs() {
+        val a = 'A'.code.toByte()
+        val intent = DebugInfoActivity.IntentBuilder(InstrumentationRegistry.getInstrumentation().context)
+            .withLogs(String(ByteArray(1024*1024) { a }))
+            .build()
+        val expected = StringBuilder(DebugInfoActivity.IntentBuilder.MAX_ELEMENT_SIZE)
+        expected.append(String(ByteArray(DebugInfoActivity.IntentBuilder.MAX_ELEMENT_SIZE - 3) { a }))
+        expected.append("...")
+        assertEquals(expected.toString(), intent.getStringExtra("logs"))
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/webdav/CredentialsStoreTest.kt

@@ -0,0 +1,40 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.webdav
+
+import at.bitfire.davdroid.db.Credentials
+import dagger.hilt.android.testing.HiltAndroidRule
+import dagger.hilt.android.testing.HiltAndroidTest
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertNull
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import javax.inject.Inject
+
+@HiltAndroidTest
+class CredentialsStoreTest {
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    @Inject
+    lateinit var store: CredentialsStore
+
+    @Before
+    fun setUp() {
+        hiltRule.inject()
+    }
+
+    @Test
+    fun testSetGetDelete() {
+        store.setCredentials(0, Credentials(username = "myname", password = "12345"))
+        assertEquals(Credentials(username = "myname", password = "12345"), store.getCredentials(0))
+
+        store.setCredentials(0, null)
+        assertNull(store.getCredentials(0))
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/webdav/DavDocumentsProviderTest.kt

@@ -0,0 +1,254 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.webdav
+
+import android.content.Context
+import android.security.NetworkSecurityPolicy
+import at.bitfire.davdroid.R
+import at.bitfire.davdroid.db.AppDatabase
+import at.bitfire.davdroid.db.WebDavDocument
+import at.bitfire.davdroid.db.WebDavMount
+import at.bitfire.davdroid.network.HttpClient
+import dagger.hilt.android.qualifiers.ApplicationContext
+import dagger.hilt.android.testing.HiltAndroidRule
+import dagger.hilt.android.testing.HiltAndroidTest
+import okhttp3.CookieJar
+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.assertTrue
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import javax.inject.Inject
+
+@HiltAndroidTest
+class DavDocumentsProviderTest {
+
+    companion object {
+        private const val PATH_WEBDAV_ROOT = "/webdav"
+    }
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    @Inject
+    @ApplicationContext
+    lateinit var context: Context
+
+    @Inject
+    lateinit var db: AppDatabase
+
+    @Inject
+    lateinit var logger: java.util.logging.Logger
+
+    @Before
+    fun setUp() {
+        hiltRule.inject()
+    }
+
+
+    private var mockServer =  MockWebServer()
+
+    private lateinit var client: HttpClient
+
+
+    @Before
+    fun mockServerSetup() {
+        // Start mock web server
+        mockServer.dispatcher = TestDispatcher(logger)
+        mockServer.start()
+
+        client = HttpClient.Builder(context).build()
+
+        // mock server delivers HTTP without encryption
+        assertTrue(NetworkSecurityPolicy.getInstance().isCleartextTrafficPermitted)
+    }
+
+    @After
+    fun cleanUp() {
+        mockServer.shutdown()
+        db.close()
+    }
+
+
+    @Test
+    fun testDoQueryChildren_insert() {
+        // Create parent and root in database
+        val id = db.webDavMountDao().insert(WebDavMount(0, "Cat food storage", mockServer.url(PATH_WEBDAV_ROOT)))
+        val webDavMount = db.webDavMountDao().getById(id)
+        val parent = db.webDavDocumentDao().getOrCreateRoot(webDavMount)
+        val cookieStore = mutableMapOf<Long, CookieJar>()
+
+        // Query
+        DavDocumentsProvider.DavDocumentsActor(context, db, logger, cookieStore, CredentialsStore(context), context.getString(R.string.webdav_authority))
+            .queryChildren(parent)
+
+        // Assert new children were inserted into db
+        assertEquals(3, db.webDavDocumentDao().getChildren(parent.id).size)
+        assertEquals("Secret_Document.pages", db.webDavDocumentDao().getChildren(parent.id)[0].displayName)
+        assertEquals("MeowMeow_Cats.docx", db.webDavDocumentDao().getChildren(parent.id)[1].displayName)
+        assertEquals("Library", db.webDavDocumentDao().getChildren(parent.id)[2].displayName)
+    }
+
+    @Test
+    fun testDoQueryChildren_update() {
+        // Create parent and root in database
+        val mountId = db.webDavMountDao().insert(WebDavMount(0, "Cat food storage", mockServer.url(PATH_WEBDAV_ROOT)))
+        val webDavMount = db.webDavMountDao().getById(mountId)
+        val parent = db.webDavDocumentDao().getOrCreateRoot(webDavMount)
+        val cookieStore = mutableMapOf<Long, CookieJar>()
+        assertEquals("Cat food storage", db.webDavDocumentDao().get(parent.id)!!.displayName)
+
+        // Create a folder
+        val folderId = db.webDavDocumentDao().insert(
+            WebDavDocument(
+                0,
+                mountId,
+                parent.id,
+                "My_Books",
+                true,
+                "My Books",
+            )
+        )
+        assertEquals("My_Books", db.webDavDocumentDao().get(folderId)!!.name)
+        assertEquals("My Books", db.webDavDocumentDao().get(folderId)!!.displayName)
+
+        // Query - should update the parent displayname and folder name
+        DavDocumentsProvider.DavDocumentsActor(context, db, logger, cookieStore, CredentialsStore(context), context.getString(R.string.webdav_authority))
+            .queryChildren(parent)
+
+        // Assert parent and children were updated in database
+        assertEquals("Cats WebDAV", db.webDavDocumentDao().get(parent.id)!!.displayName)
+        assertEquals("Library", db.webDavDocumentDao().getChildren(parent.id)[2].name)
+        assertEquals("Library", db.webDavDocumentDao().getChildren(parent.id)[2].displayName)
+
+    }
+
+    @Test
+    fun testDoQueryChildren_delete() {
+        // Create parent and root in database
+        val mountId = db.webDavMountDao().insert(WebDavMount(0, "Cat food storage", mockServer.url(PATH_WEBDAV_ROOT)))
+        val webDavMount = db.webDavMountDao().getById(mountId)
+        val parent = db.webDavDocumentDao().getOrCreateRoot(webDavMount)
+        val cookieStore = mutableMapOf<Long, CookieJar>()
+
+        // Create a folder
+        val folderId = db.webDavDocumentDao().insert(
+            WebDavDocument(0, mountId, parent.id, "deleteme", true, "Should be deleted")
+        )
+        assertEquals("deleteme", db.webDavDocumentDao().get(folderId)!!.name)
+
+        // Query - discovers serverside deletion
+        DavDocumentsProvider.DavDocumentsActor(context, db, logger, cookieStore, CredentialsStore(context), context.getString(R.string.webdav_authority))
+            .queryChildren(parent)
+
+        // Assert folder got deleted
+        assertEquals(null, db.webDavDocumentDao().get(folderId))
+    }
+
+    @Test
+    fun testDoQueryChildren_updateTwoParentsSimultaneous() {
+        // Create root in database
+        val mountId = db.webDavMountDao().insert(WebDavMount(0, "Cat food storage", mockServer.url(PATH_WEBDAV_ROOT)))
+        val webDavMount = db.webDavMountDao().getById(mountId)
+        val root = db.webDavDocumentDao().getOrCreateRoot(webDavMount)
+        val cookieStore = mutableMapOf<Long, CookieJar>()
+
+        // Create two parents
+        val parent1Id = db.webDavDocumentDao().insert(WebDavDocument(0, mountId, root.id, "parent1", true))
+        val parent2Id = db.webDavDocumentDao().insert(WebDavDocument(0, mountId, root.id, "parent2", true))
+        val parent1 = db.webDavDocumentDao().get(parent1Id)!!
+        val parent2 = db.webDavDocumentDao().get(parent2Id)!!
+        assertEquals("parent1", parent1.name)
+        assertEquals("parent2", parent2.name)
+
+        // Query - find children of two nodes simultaneously
+        DavDocumentsProvider.DavDocumentsActor(context, db, logger, cookieStore, CredentialsStore(context), context.getString(R.string.webdav_authority))
+            .queryChildren(parent1)
+        DavDocumentsProvider.DavDocumentsActor(context, db, logger, cookieStore, CredentialsStore(context), context.getString(R.string.webdav_authority))
+            .queryChildren(parent2)
+
+        // Assert the two folders names have changed
+        assertEquals("childOne.txt", db.webDavDocumentDao().getChildren(parent1Id)[0].name)
+        assertEquals("childTwo.txt", db.webDavDocumentDao().getChildren(parent2Id)[0].name)
+    }
+
+
+    // mock server
+
+    class TestDispatcher(
+        private val logger: java.util.logging.Logger
+    ): Dispatcher() {
+
+        data class Resource(
+            val name: String,
+            val props: String
+        )
+
+        override fun dispatch(request: RecordedRequest): MockResponse {
+            val requestPath = request.path!!.trimEnd('/')
+
+            if (request.method.equals("PROPFIND", true)) {
+
+                val propsMap = mutableMapOf(
+                    PATH_WEBDAV_ROOT to arrayOf(
+                        Resource("",
+                            "<resourcetype><collection/></resourcetype>" +
+                            "<displayname>Cats WebDAV</displayname>"
+                        ),
+                        Resource("Secret_Document.pages",
+                            "<displayname>Secret_Document.pages</displayname>",
+                        ),
+                        Resource("MeowMeow_Cats.docx",
+                            "<displayname>MeowMeow_Cats.docx</displayname>"
+                        ),
+                        Resource("Library",
+                            "<resourcetype><collection/></resourcetype>" +
+                            "<displayname>Library</displayname>"
+                        )
+                    ),
+
+                    "$PATH_WEBDAV_ROOT/parent1" to arrayOf(
+                        Resource("childOne.txt",
+                            "<displayname>childOne.txt</displayname>"
+                        ),
+                    ),
+                    "$PATH_WEBDAV_ROOT/parent2" to arrayOf(
+                        Resource("childTwo.txt",
+                            "<displayname>childTwo.txt</displayname>"
+                        )
+                    )
+                )
+
+                val responses = propsMap[requestPath]?.joinToString { resource ->
+                    "<response><href>$requestPath/${resource.name}</href><propstat><prop>" +
+                            resource.props +
+                    "</prop></propstat></response>"
+                }
+
+                val multistatus =
+                    "<multistatus xmlns='DAV:' " +
+                        "xmlns:CARD='urn:ietf:params:xml:ns:carddav' " +
+                        "xmlns:CAL='urn:ietf:params:xml:ns:caldav'>" +
+                        responses +
+                    "</multistatus>"
+
+                logger.info("Query path: $requestPath")
+                logger.info("Response: $multistatus")
+                return MockResponse()
+                    .setResponseCode(207)
+                    .setBody(multistatus)
+            }
+
+            return MockResponse().setResponseCode(404)
+        }
+
+    }
+
+}

app/src/androidTest/kotlin/at/bitfire/davdroid/webdav/WebDavMountRepositoryTest.kt

@@ -0,0 +1,66 @@
+/*
+ * Copyright © All Contributors. See LICENSE and AUTHORS in the root directory for details.
+ */
+
+package at.bitfire.davdroid.webdav
+
+import dagger.hilt.android.testing.HiltAndroidRule
+import dagger.hilt.android.testing.HiltAndroidTest
+import kotlinx.coroutines.runBlocking
+import okhttp3.mockwebserver.MockResponse
+import okhttp3.mockwebserver.MockWebServer
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Before
+import org.junit.Rule
+import org.junit.Test
+import javax.inject.Inject
+
+@HiltAndroidTest
+class WebDavMountRepositoryTest {
+
+    @get:Rule
+    val hiltRule = HiltAndroidRule(this)
+
+    @Inject
+    lateinit var repository: WebDavMountRepository
+
+    @Before
+    fun setUp() {
+        hiltRule.inject()
+    }
+
+    val web = MockWebServer()
+    val url = web.url("/")
+
+    @Test
+    fun testHasWebDav_NoDavHeader() = runBlocking {
+        web.enqueue(MockResponse().setResponseCode(200))
+        assertFalse(repository.hasWebDav(url, null))
+    }
+
+    @Test
+    fun testHasWebDav_DavClass1() = runBlocking {
+        web.enqueue(MockResponse()
+            .setResponseCode(200)
+            .addHeader("DAV: 1"))
+        assertTrue(repository.hasWebDav(url, null))
+    }
+
+    @Test
+    fun testHasWebDav_DavClass2() = runBlocking {
+        web.enqueue(MockResponse()
+            .setResponseCode(200)
+            .addHeader("DAV: 1, 2"))
+        assertTrue(repository.hasWebDav(url, null))
+    }
+
+    @Test
+    fun testHasWebDav_DavClass3() = runBlocking {
+        web.enqueue(MockResponse()
+            .setResponseCode(200)
+            .addHeader("DAV: 1, 3"))
+        assertTrue(repository.hasWebDav(url, null))
+    }
+
+}

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

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="utf-8"?>
 <!--
-  ~ Copyright (c) 2013 – 2015 Ricki Hirner (bitfire web engineering).
+  ~ 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
@@ -9,6 +9,7 @@
 
 <resources>
 
-    <string name="app_name">DavdroidTest</string>
+    <string name="app_name">Davx5Test</string>
+    <string name="account_type_test">at.bitfire.davdroid.test</string>
 
-</resources>
+</resources>

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

@@ -0,0 +1,5 @@
+<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/debug/res/values/colors.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <color name="primaryColor">#E07C25</color>
+    <color name="primaryLightColor">#E5A371</color>
+    <color name="primaryDarkColor">#7C3E07</color>
+</resources>

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

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <string name="app_name" translatable="false">DAVx⁵ Debug</string>
+</resources>

app/src/gplay/res/menu/activity_accounts_drawer.xml

@@ -1,55 +0,0 @@
-<?xml version="1.0" encoding="utf-8"?>
-<!--
-  ~ Copyright © 2013 – 2016 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
-  -->
-
-<menu xmlns:tools="http://schemas.android.com/tools"
-      xmlns:android="http://schemas.android.com/apk/res/android">
-
-    <item
-        android:id="@+id/nav_about"
-        android:icon="@drawable/ic_info_dark"
-        android:title="@string/navigation_drawer_about"/>
-    <item
-        android:id="@+id/nav_app_settings"
-        android:icon="@drawable/ic_settings_dark"
-        android:title="@string/navigation_drawer_settings"/>
-
-    <item android:title="@string/navigation_drawer_news_updates">
-        <menu>
-            <item
-                android:id="@+id/nav_twitter"
-                android:icon="@drawable/twitter"
-                android:title="\@davdroidapp"
-                tools:ignore="HardcodedText"/>
-        </menu>
-    </item>
-
-    <item android:title="@string/navigation_drawer_external_links">
-        <menu>
-            <item
-                android:id="@+id/nav_website"
-                android:icon="@drawable/ic_home_dark"
-                android:title="@string/navigation_drawer_website"/>
-            <item
-                android:id="@+id/nav_faq"
-                android:icon="@drawable/ic_help_dark"
-                android:title="@string/navigation_drawer_faq"/>
-            <item
-                android:id="@+id/nav_forums"
-                android:icon="@drawable/ic_forum_dark"
-                android:title="@string/navigation_drawer_forums"/>
-            <item
-                android:id="@+id/nav_donate"
-                android:icon="@drawable/ic_attach_money_dark"
-                android:title="(entry disabled)"
-                android:visible="false"
-                tools:ignore="HardcodedText"/>
-        </menu>
-    </item>
-
-</menu>

app/src/main/AndroidManifest.xml

@@ -1,13 +1,5 @@
 <?xml version="1.0" encoding="utf-8"?>
-<!--
-  ~ Copyright (c) 2013 – 2015 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
--->
-<manifest package="at.bitfire.davdroid"
-          xmlns:android="http://schemas.android.com/apk/res/android"
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
           xmlns:tools="http://schemas.android.com/tools"
           android:installLocation="internalOnly">
 
@@ -15,28 +7,17 @@
     <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE"/>
     <uses-permission android:name="android.permission.ACCESS_WIFI_STATE"/>
     <uses-permission android:name="android.permission.INTERNET"/>
-    <uses-permission android:name="android.permission.GET_ACCOUNTS"/>
-    <uses-permission android:name="android.permission.MANAGE_ACCOUNTS"/>
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS"/>
     <uses-permission android:name="android.permission.READ_SYNC_SETTINGS"/>
+    <uses-permission android:name="android.permission.READ_SYNC_STATS"/>
     <uses-permission android:name="android.permission.WRITE_SYNC_SETTINGS"/>
+    <uses-permission android:name="android.permission.RECEIVE_BOOT_COMPLETED"/>
+    <uses-permission android:name="android.permission.REQUEST_IGNORE_BATTERY_OPTIMIZATIONS"/>
 
-    <!-- legacy permissions -->
-    <uses-permission
-        android:name="android.permission.AUTHENTICATE_ACCOUNTS"
-        android:maxSdkVersion="22"
-        tools:ignore="UnusedAttribute"/>
-    <!--
-         for writing external log files; permission only required for SDK <= 18 because since then,
-         writing to app-private directory doesn't require extra permissions
-    -->
-    <uses-permission
-        android:name="android.permission.READ_EXTERNAL_STORAGE"
-        android:maxSdkVersion="18"
-        tools:ignore="UnusedAttribute"/>
-    <uses-permission
-        android:name="android.permission.WRITE_EXTERNAL_STORAGE"
-        android:maxSdkVersion="18"
-        tools:ignore="UnusedAttribute"/>
+    <!-- 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"/>
 
     <!-- other permissions -->
     <!-- android.permission-group.CONTACTS -->
@@ -46,49 +27,228 @@
     <uses-permission android:name="android.permission.READ_CALENDAR"/>
     <uses-permission android:name="android.permission.WRITE_CALENDAR"/>
 
+    <!-- android.permission-group.LOCATION -->
+    <!-- getting the WiFi name (for "sync in Wifi only") requires
+      - coarse location (Android 8.1)
+      - fine location (Android 10) -->
+    <uses-permission-sdk-23 android:name="android.permission.ACCESS_COARSE_LOCATION"/>
+    <uses-permission-sdk-23 android:name="android.permission.ACCESS_FINE_LOCATION"/>
+    <!-- required since Android 10 to get the WiFi name while in background (= while syncing) -->
+    <uses-permission-sdk-23 android:name="android.permission.ACCESS_BACKGROUND_LOCATION"/>
+
     <!-- ical4android declares task access permissions -->
 
+    <!-- Disable GPS capability requirement, which is implicitly derived from ACCESS_FINE_LOCATION
+    permission and makes app unusable on some devices without GPS. We need location permissions only
+    to get the current WiFi SSID, and we don't need GPS for that. -->
+    <uses-feature android:name="android.hardware.location.gps" android:required="false" />
+
     <application
         android:name=".App"
-        android:allowBackup="true"
-        android:fullBackupContent="false"
-        android:icon="@drawable/ic_launcher"
+        android:allowBackup="false"
+        android:networkSecurityConfig="@xml/network_security_config"
+        android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
-        android:theme="@style/AppTheme"
-        tools:ignore="UnusedAttribute">
+        android:theme="@style/Theme.AppCompat.DayNight.NoActionBar"
+        android:resizeableActivity="true"
+        tools:ignore="UnusedAttribute"
+        android:supportsRtl="true">
 
-        <receiver
-            android:name=".App$ReinitLoggingReceiver"
-            android:exported="false"
-            android:process=":sync">
-            <intent-filter>
-                <action android:name="at.bitfire.davdroid.REINIT_LOGGER"/>
-            </intent-filter>
-        </receiver>
-        <receiver
-            android:name=".AccountSettings$AppUpdatedReceiver"
+        <!-- required for Hilt/WorkManager integration -->
+        <provider
+            android:name="androidx.startup.InitializationProvider"
+            android:authorities="${applicationId}.androidx-startup"
+            tools:node="remove">
+        </provider>
+
+        <!-- Remove the node added by AppAuth (remove only from net.openid.appauth library, not from our flavor manifest files) -->
+        <activity android:name="net.openid.appauth.RedirectUriReceiverActivity"
+            tools:node="remove" tools:selector="net.openid.appauth"/>
+
+        <activity android:name=".ui.intro.IntroActivity" />
+        <activity
+            android:name=".ui.AccountsActivity"
             android:exported="true">
             <intent-filter>
-                <action android:name="android.intent.action.PACKAGE_REPLACED" />
-                <data android:scheme="package" android:path="at.bitfire.davdroid" />
+                <action android:name="android.intent.action.MAIN"/>
+                <category android:name="android.intent.category.LAUNCHER"/>
             </intent-filter>
-        </receiver>
+        </activity>
 
+        <activity
+            android:name=".ui.AboutActivity"
+            android:label="@string/navigation_drawer_about"
+            android:parentActivityName=".ui.AccountsActivity"/>
+
+        <activity
+            android:name=".ui.AppSettingsActivity"
+            android:label="@string/app_settings"
+            android:parentActivityName=".ui.AccountsActivity"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.APPLICATION_PREFERENCES"/>
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".ui.DebugInfoActivity"
+            android:parentActivityName=".ui.AppSettingsActivity"
+            android:exported="true"
+            android:label="@string/debug_info_title">
+            <intent-filter>
+                <action android:name="android.intent.action.BUG_REPORT"/>
+                <category android:name="android.intent.category.DEFAULT" />
+            </intent-filter>
+        </activity>
+        <activity
+            android:name=".ui.PermissionsActivity"
+            android:label="@string/app_settings_security_app_permissions"
+            android:parentActivityName=".ui.AppSettingsActivity" />
+        <activity
+            android:name=".ui.TasksActivity"
+            android:label="@string/intro_tasks_title"
+            android:parentActivityName=".ui.AppSettingsActivity" />
+
+        <activity
+            android:name=".ui.setup.LoginActivity"
+            android:parentActivityName=".ui.AccountsActivity"
+            android:windowSoftInputMode="adjustResize"
+            android:exported="true">
+            <intent-filter>
+                <action android:name="android.intent.action.MAIN"/>
+            </intent-filter>
+            <intent-filter>
+                <action android:name="android.intent.action.VIEW"/>
+                <category android:name="android.intent.category.BROWSABLE"/>
+                <category android:name="android.intent.category.DEFAULT"/>
+                <data android:scheme="caldav"/>
+                <data android:scheme="caldavs"/>
+                <data android:scheme="carddav"/>
+                <data android:scheme="carddavs"/>
+                <data android:scheme="davx5"/>
+            </intent-filter>
+            <intent-filter>
+                <action android:name="loginFlow" /> <!-- Ensures this filter matches, even if the sending app is not defining an action -->
+                <category android:name="android.intent.category.DEFAULT" />
+                <data
+                    tools:ignore="AppLinkUrlError"
+                    android:scheme="http" />
+                <data android:scheme="https" />
+            </intent-filter>
+        </activity>
+
+        <activity
+            android:name=".ui.account.AccountActivity"
+            android:parentActivityName=".ui.AccountsActivity"
+            android:exported="true">
+        </activity>
+        <activity
+            android:name=".ui.account.CollectionActivity"
+            android:parentActivityName=".ui.account.AccountActivity" />
+        <activity
+            android:name=".ui.account.CreateAddressBookActivity"
+            android:parentActivityName=".ui.account.AccountActivity" />
+        <activity
+            android:name=".ui.account.CreateCalendarActivity"
+            android:parentActivityName=".ui.account.AccountActivity" />
+        <activity
+            android:name=".ui.account.AccountSettingsActivity"
+            android:parentActivityName=".ui.account.AccountActivity" />
+        <activity
+            android:name=".ui.account.WifiPermissionsActivity"
+            android:parentActivityName=".ui.account.AccountSettingsActivity" />
+
+        <activity
+            android:name=".ui.webdav.WebdavMountsActivity"
+            android:exported="true"
+            android:parentActivityName=".ui.AccountsActivity" />
+        <activity
+            android:name=".ui.webdav.AddWebdavMountActivity"
+            android:parentActivityName=".ui.webdav.WebdavMountsActivity"
+            android:windowSoftInputMode="adjustResize" />
+
+        <!-- account type "DAVx⁵" -->
         <service
-            android:name=".syncadapter.AccountAuthenticatorService"
+            android:name=".sync.account.AccountAuthenticatorService"
             android:exported="false">
             <intent-filter>
                 <action android:name="android.accounts.AccountAuthenticator"/>
             </intent-filter>
+            <meta-data
+                android:name="android.accounts.AccountAuthenticator"
+                android:resource="@xml/account_authenticator"/>
+        </service>
+        <service
+            android:name=".sync.CalendarsSyncAdapterService"
+            android:exported="true"
+            tools:ignore="ExportedService">
+            <intent-filter>
+                <action android:name="android.content.SyncAdapter"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.content.SyncAdapter"
+                android:resource="@xml/sync_calendars"/>
+        </service>
+        <service
+            android:name=".sync.JtxSyncAdapterService"
+            android:exported="true"
+            tools:ignore="ExportedService">
+            <intent-filter>
+                <action android:name="android.content.SyncAdapter"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.content.SyncAdapter"
+                android:resource="@xml/sync_notes"/>
+        </service>
+        <service
+            android:name=".sync.OpenTasksSyncAdapterService"
+            android:exported="true"
+            tools:ignore="ExportedService">
+            <intent-filter>
+                <action android:name="android.content.SyncAdapter"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.content.SyncAdapter"
+                android:resource="@xml/sync_opentasks"/>
+        </service>
+        <service
+            android:name=".sync.TasksOrgSyncAdapterService"
+            android:exported="true"
+            tools:ignore="ExportedService">
+            <intent-filter>
+                <action android:name="android.content.SyncAdapter"/>
+            </intent-filter>
+            <meta-data
+                android:name="android.content.SyncAdapter"
+                android:resource="@xml/sync_tasks_org"/>
+        </service>
+        <provider
+            android:authorities="@string/webdav_authority"
+            android:name=".webdav.DavDocumentsProvider"
+            android:exported="true"
+            android:grantUriPermissions="true"
+            android:permission="android.permission.MANAGE_DOCUMENTS">
+            <intent-filter>
+                <action android:name="android.content.action.DOCUMENTS_PROVIDER" />
+            </intent-filter>
+        </provider>
+
+        <!-- account type "DAVx⁵ Address book" -->
+        <service
+            android:name=".sync.account.AddressBookAuthenticatorService"
+            android:exported="true"
+            tools:ignore="ExportedService">   <!-- Since Android 11, this must be true so that Google Contacts shows the address book accounts -->
+            <intent-filter>
+                <action android:name="android.accounts.AccountAuthenticator"/>
+            </intent-filter>
 
             <meta-data
                 android:name="android.accounts.AccountAuthenticator"
-                android:resource="@xml/account_authenticator"/>
+                android:resource="@xml/account_authenticator_address_book"/>
         </service>
         <service
-            android:name=".syncadapter.ContactsSyncAdapterService"
+            android:name=".sync.ContactsSyncAdapterService"
             android:exported="true"
-            android:process=":sync"
             tools:ignore="ExportedService">
             <intent-filter>
                 <action android:name="android.content.SyncAdapter"/>
@@ -101,101 +261,77 @@
                 android:name="android.provider.CONTACTS_STRUCTURE"
                 android:resource="@xml/contacts"/>
         </service>
-        <service
-            android:name=".syncadapter.CalendarsSyncAdapterService"
-            android:exported="true"
-            android:process=":sync"
-            tools:ignore="ExportedService">
-            <intent-filter>
-                <action android:name="android.content.SyncAdapter"/>
-            </intent-filter>
 
+        <!-- provider to share debug info/logs -->
+        <provider
+            android:name="androidx.core.content.FileProvider"
+            android:authorities="@string/authority_debug_provider"
+            android:grantUriPermissions="true"
+            android:exported="false">
             <meta-data
-                android:name="android.content.SyncAdapter"
-                android:resource="@xml/sync_calendars"/>
-        </service>
-        <service
-            android:name=".syncadapter.TasksSyncAdapterService"
-            android:exported="true"
-            android:process=":sync"
-            tools:ignore="ExportedService">
-            <intent-filter>
-                <action android:name="android.content.SyncAdapter"/>
-            </intent-filter>
+                android:name="android.support.FILE_PROVIDER_PATHS"
+                android:resource="@xml/debug_paths" />
+        </provider>
 
-            <meta-data
-                android:name="android.content.SyncAdapter"
-                android:resource="@xml/sync_tasks"/>
-        </service>
-
-        <service
-            android:name=".DavService"
-            android:enabled="true">
-        </service>
-        <receiver
-            android:name=".AccountsChangedReceiver"
-            android:enabled="true"
-            android:exported="true">
+        <!-- UnifiedPush receiver -->
+        <receiver android:exported="true"  android:enabled="true"  android:name=".push.UnifiedPushReceiver" tools:ignore="ExportedReceiver">
             <intent-filter>
-                <action android:name="android.accounts.LOGIN_ACCOUNTS_CHANGED"/>
+                <action android:name="org.unifiedpush.android.connector.MESSAGE"/>
+                <action android:name="org.unifiedpush.android.connector.UNREGISTERED"/>
+                <action android:name="org.unifiedpush.android.connector.NEW_ENDPOINT"/>
+                <action android:name="org.unifiedpush.android.connector.REGISTRATION_FAILED"/>
             </intent-filter>
         </receiver>
-        
-        <activity
-            android:name=".ui.AccountsActivity"
-            android:label="@string/app_name"
-            android:theme="@style/AppTheme.NoActionBar">
+
+        <!-- Widgets -->
+        <receiver android:name=".ui.widget.SyncButtonWidgetReceiver"
+            android:exported="true">
             <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
-                <category android:name="android.intent.category.LAUNCHER"/>
+                <action android:name="android.appwidget.action.APPWIDGET_UPDATE" />
             </intent-filter>
-        </activity>
 
-        <activity
-            android:name=".ui.AboutActivity"
-            android:label="@string/app_name"
-            android:theme="@style/AppTheme.NoActionBar"
-            android:parentActivityName=".ui.AccountsActivity"/>
-
-        <activity
-            android:name=".ui.AppSettingsActivity"
-            android:label="@string/app_settings"
-            android:parentActivityName=".ui.AccountsActivity"/>
-
-        <activity android:name=".ui.PermissionsActivity"
-                  android:label="@string/permissions_title"
-                  android:parentActivityName=".ui.AccountsActivity"/>
-
-        <activity
-            android:name=".ui.setup.LoginActivity"
-            android:label="@string/login_title"
-            android:parentActivityName=".ui.AccountsActivity">
-            <intent-filter>
-                <action android:name="android.intent.action.MAIN"/>
-            </intent-filter>
-        </activity>
-
-        <activity
-            android:name=".ui.AccountActivity"
-            android:parentActivityName=".ui.AccountsActivity">
-        </activity>
-        <activity android:name=".ui.AccountSettingsActivity"/>
-        <activity android:name=".ui.CreateAddressBookActivity"
-            android:label="@string/create_addressbook"/>
-        <activity android:name=".ui.CreateCalendarActivity"
-                  android:label="@string/create_calendar"/>
-
-        <activity
-            android:name=".ui.DebugInfoActivity"
-            android:exported="true"
-            android:label="@string/debug_info_title">
-        </activity>
-
-        <!-- MemorizingTrustManager -->
-        <activity
-            android:name="de.duenndns.ssl.MemorizingActivity"
-            android:theme="@android:style/Theme.Holo.Light.Dialog.NoActionBar"/>
+            <meta-data
+                android:name="android.appwidget.provider"
+                android:resource="@xml/widget_info_sync_button" />
+        </receiver>
 
     </application>
 
-</manifest>
+    <!-- package visiblity – which apps do we need to see? -->
+    <queries>
+        <!-- system providers (listing them is technically not required, but some apps like the
+        Huawei calendar take this as indication of whether these providers are accessed) -->
+        <provider android:authorities="com.android.calendar"/>
+        <provider android:authorities="com.android.contacts"/>
+
+        <!-- task providers -->
+        <package android:name="at.techbee.jtx" />
+        <package android:name="org.dmfs.tasks" />
+        <package android:name="org.tasks" />
+
+        <!-- ICSx5 for Webcal feeds -->
+        <package android:name="at.bitfire.icsdroid"/>
+
+        <!-- apps that interact with contact, calendar, task data (for debug info) -->
+        <intent>
+            <action android:name="*" />
+            <data android:scheme="content" android:host="com.android.contacts" />
+        </intent>
+        <intent>
+            <action android:name="*" />
+            <data android:scheme="content" android:host="com.android.calendar" />
+        </intent>
+
+        <!-- Open URLs in a browser or other app [https://developer.android.com/training/package-visibility/use-cases#open-urls-browser-or-other-app] -->
+        <intent>
+            <action android:name="android.intent.action.VIEW" />
+            <data android:scheme="https" />
+        </intent>
+
+        <!-- Custom Tabs support (e.g. Nextcloud Login Flow) -->
+        <intent>
+            <action android:name="android.support.customtabs.action.CustomTabsService" />
+        </intent>
+    </queries>
+
+</manifest>

app/src/main/assets/apache2.html

@@ -1,153 +0,0 @@
-<h3>Apache License, Version 2.0, January 2004</h3>
-<p><a href="http://www.apache.org/licenses/">http://www.apache.org/licenses/</a> </p>
-<p>TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION</p>
-<p><strong><a name="definitions">1. Definitions</a></strong>.</p>
-<p>"License" shall mean the terms and conditions for use, reproduction, and
-distribution as defined by Sections 1 through 9 of this document.</p>
-<p>"Licensor" shall mean the copyright owner or entity authorized by the
-copyright owner that is granting the License.</p>
-<p>"Legal Entity" shall mean the union of the acting entity and all other
-entities that control, are controlled by, or are under common control with
-that entity. For the purposes of this definition, "control" means (i) the
-power, direct or indirect, to cause the direction or management of such
-entity, whether by contract or otherwise, or (ii) ownership of fifty
-percent (50%) or more of the outstanding shares, or (iii) beneficial
-ownership of such entity.</p>
-<p>"You" (or "Your") shall mean an individual or Legal Entity exercising
-permissions granted by this License.</p>
-<p>"Source" form shall mean the preferred form for making modifications,
-including but not limited to software source code, documentation source,
-and configuration files.</p>
-<p>"Object" form shall mean any form resulting from mechanical transformation
-or translation of a Source form, including but not limited to compiled
-object code, generated documentation, and conversions to other media types.</p>
-<p>"Work" shall mean the work of authorship, whether in Source or Object form,
-made available under the License, as indicated by a copyright notice that
-is included in or attached to the work (an example is provided in the
-Appendix below).</p>
-<p>"Derivative Works" shall mean any work, whether in Source or Object form,
-that is based on (or derived from) the Work and for which the editorial
-revisions, annotations, elaborations, or other modifications represent, as
-a whole, an original work of authorship. For the purposes of this License,
-Derivative Works shall not include works that remain separable from, or
-merely link (or bind by name) to the interfaces of, the Work and Derivative
-Works thereof.</p>
-<p>"Contribution" shall mean any work of authorship, including the original
-version of the Work and any modifications or additions to that Work or
-Derivative Works thereof, that is intentionally submitted to Licensor for
-inclusion in the Work by the copyright owner or by an individual or Legal
-Entity authorized to submit on behalf of the copyright owner. For the
-purposes of this definition, "submitted" means any form of electronic,
-verbal, or written communication sent to the Licensor or its
-representatives, including but not limited to communication on electronic
-mailing lists, source code control systems, and issue tracking systems that
-are managed by, or on behalf of, the Licensor for the purpose of discussing
-and improving the Work, but excluding communication that is conspicuously
-marked or otherwise designated in writing by the copyright owner as "Not a
-Contribution."</p>
-<p>"Contributor" shall mean Licensor and any individual or Legal Entity on
-behalf of whom a Contribution has been received by Licensor and
-subsequently incorporated within the Work.</p>
-<p><strong><a name="copyright">2. Grant of Copyright License</a></strong>. Subject to the
-terms and conditions of this License, each Contributor hereby grants to You
-a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-copyright license to reproduce, prepare Derivative Works of, publicly
-display, publicly perform, sublicense, and distribute the Work and such
-Derivative Works in Source or Object form.</p>
-<p><strong><a name="patent">3. Grant of Patent License</a></strong>. Subject to the terms
-and conditions of this License, each Contributor hereby grants to You a
-perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable
-(except as stated in this section) patent license to make, have made, use,
-offer to sell, sell, import, and otherwise transfer the Work, where such
-license applies only to those patent claims licensable by such Contributor
-that are necessarily infringed by their Contribution(s) alone or by
-combination of their Contribution(s) with the Work to which such
-Contribution(s) was submitted. If You institute patent litigation against
-any entity (including a cross-claim or counterclaim in a lawsuit) alleging
-that the Work or a Contribution incorporated within the Work constitutes
-direct or contributory patent infringement, then any patent licenses
-granted to You under this License for that Work shall terminate as of the
-date such litigation is filed.</p>
-<p><strong><a name="redistribution">4. Redistribution</a></strong>. You may reproduce and
-distribute copies of the Work or Derivative Works thereof in any medium,
-with or without modifications, and in Source or Object form, provided that
-You meet the following conditions:</p>
-
-<p>a. You must give any other recipients of the Work or Derivative Works a
-copy of this License; and</p>
-
-<p>b. You must cause any modified files to carry prominent notices stating
-that You changed the files; and</p>
-
-<p>c. You must retain, in the Source form of any Derivative Works that You
-distribute, all copyright, patent, trademark, and attribution notices from
-the Source form of the Work, excluding those notices that do not pertain to
-any part of the Derivative Works; and</p>
-
-<p>d. If the Work includes a "NOTICE" text file as part of its distribution,
-then any Derivative Works that You distribute must include a readable copy
-of the attribution notices contained within such NOTICE file, excluding
-those notices that do not pertain to any part of the Derivative Works, in
-at least one of the following places: within a NOTICE text file distributed
-as part of the Derivative Works; within the Source form or documentation,
-if provided along with the Derivative Works; or, within a display generated
-by the Derivative Works, if and wherever such third-party notices normally
-appear. The contents of the NOTICE file are for informational purposes only
-and do not modify the License. You may add Your own attribution notices
-within Derivative Works that You distribute, alongside or as an addendum to
-the NOTICE text from the Work, provided that such additional attribution
-notices cannot be construed as modifying the License.
-<br/>
-<br/>
-You may add Your own copyright statement to Your modifications and may
-provide additional or different license terms and conditions for use,
-reproduction, or distribution of Your modifications, or for any such
-Derivative Works as a whole, provided Your use, reproduction, and
-distribution of the Work otherwise complies with the conditions stated in
-this License.
-</p>
-
-<p><strong><a name="contributions">5. Submission of Contributions</a></strong>. Unless You
-explicitly state otherwise, any Contribution intentionally submitted for
-inclusion in the Work by You to the Licensor shall be under the terms and
-conditions of this License, without any additional terms or conditions.
-Notwithstanding the above, nothing herein shall supersede or modify the
-terms of any separate license agreement you may have executed with Licensor
-regarding such Contributions.</p>
-<p><strong><a name="trademarks">6. Trademarks</a></strong>. This License does not grant
-permission to use the trade names, trademarks, service marks, or product
-names of the Licensor, except as required for reasonable and customary use
-in describing the origin of the Work and reproducing the content of the
-NOTICE file.</p>
-<p><strong><a name="no-warranty">7. Disclaimer of Warranty</a></strong>. Unless required by
-applicable law or agreed to in writing, Licensor provides the Work (and
-each Contributor provides its Contributions) on an "AS IS" BASIS, WITHOUT
-WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied, including,
-without limitation, any warranties or conditions of TITLE,
-NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A PARTICULAR PURPOSE. You
-are solely responsible for determining the appropriateness of using or
-redistributing the Work and assume any risks associated with Your exercise
-of permissions under this License.</p>
-<p><strong><a name="no-liability">8. Limitation of Liability</a></strong>. In no event and
-under no legal theory, whether in tort (including negligence), contract, or
-otherwise, unless required by applicable law (such as deliberate and
-grossly negligent acts) or agreed to in writing, shall any Contributor be
-liable to You for damages, including any direct, indirect, special,
-incidental, or consequential damages of any character arising as a result
-of this License or out of the use or inability to use the Work (including
-but not limited to damages for loss of goodwill, work stoppage, computer
-failure or malfunction, or any and all other commercial damages or losses),
-even if such Contributor has been advised of the possibility of such
-damages.</p>
-<p><strong><a name="additional">9. Accepting Warranty or Additional Liability</a></strong>.
-While redistributing the Work or Derivative Works thereof, You may choose
-to offer, and charge a fee for, acceptance of support, warranty, indemnity,
-or other liability obligations and/or rights consistent with this License.
-However, in accepting such obligations, You may act only on Your own behalf
-and on Your sole responsibility, not on behalf of any other Contributor,
-and only if You agree to indemnify, defend, and hold each Contributor
-harmless for any liability incurred by, or claims asserted against, such
-Contributor by reason of your accepting any such warranty or additional
-liability.</p>
-
-<p>END OF TERMS AND CONDITIONS</p>

app/src/main/assets/bsd-3clause.html

@@ -1,28 +0,0 @@
-<h3>BSD License (3-clause)</h3>
-
-<p>Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions
-are met:</p>
-
-<p>o Redistributions of source code must retain the above copyright
-notice, this list of conditions and the following disclaimer.</p>
-
-<p>o Redistributions in binary form must reproduce the above copyright
-notice, this list of conditions and the following disclaimer in the
-documentation and/or other materials provided with the distribution.</p>
-
-<p>o Neither the name of Ben Fortuna nor the names of any other contributors
-may be used to endorse or promote products derived from this software
-without specific prior written permission.</p>
-
-<p>THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR
-CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
-EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
-PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
-PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
-LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
-NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</p>

app/src/main/assets/bsd.html

@@ -1,23 +0,0 @@
-<h3>BSD License</h3>
-
-<p>Redistribution and use in source and binary forms, with or without
-modification, are permitted provided that the following conditions are met:</p>
-
-<p>1. Redistributions of source code must retain the above copyright notice, this
-   list of conditions and the following disclaimer.</p>
-
-<p>2. Redistributions in binary form must reproduce the above copyright notice,
-   this list of conditions and the following disclaimer in the documentation
-   and/or other materials provided with the distribution.</p>
-
-<p>THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
-ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
-WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
-DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
-ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
-(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
-LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
-ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
-SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</p>
-

app/src/main/assets/gplv3.html

@@ -2,9 +2,9 @@
 <p style="text-align: center;">Version 3, 29 June 2007</p>
 
 <p>Copyright &copy; 2007 Free Software Foundation, Inc.
- &lt;<a href="http://fsf.org/">http://fsf.org/</a>&gt;</p><p>
- Everyone is permitted to copy and distribute verbatim copies
- of this license document, but changing it is not allowed.</p>
+&lt;<a href="http://fsf.org/">http://fsf.org/</a>&gt;</p><p>
+Everyone is permitted to copy and distribute verbatim copies
+of this license document, but changing it is not allowed.</p>
 
 <h3><a name="preamble"></a>Preamble</h3>
 
@@ -42,16 +42,16 @@ know their rights.</p>
 (1) assert copyright on the software, and (2) offer you this License
 giving you legal permission to copy, distribute and/or modify it.</p>
 
-<p>For the developers' and authors' protection, the GPL clearly explains
-that there is no warranty for this free software.  For both users' and
-authors' sake, the GPL requires that modified versions be marked as
+<p>For the developers\' and authors\' protection, the GPL clearly explains
+that there is no warranty for this free software.  For both users\' and
+authors\' sake, the GPL requires that modified versions be marked as
 changed, so that their problems will not be attributed erroneously to
 authors of previous versions.</p>
 
 <p>Some devices are designed to deny users access to install or run
 modified versions of the software inside them, although the manufacturer
 can do so.  This is fundamentally incompatible with the aim of
-protecting users' freedom to change the software.  The systematic
+protecting users\' freedom to change the software.  The systematic
 pattern of such abuse occurs in the area of products for individuals to
 use, which is precisely where it is most unacceptable.  Therefore, we
 have designed this version of the GPL to prohibit the practice for those
@@ -77,7 +77,7 @@ modification follow.</p>
 
 <p>&ldquo;Copyright&rdquo; also means copyright-like laws that apply to other kinds of
 works, such as semiconductor masks.</p>
- 
+
 <p>&ldquo;The Program&rdquo; refers to any copyrightable work licensed under this
 License.  Each licensee is addressed as &ldquo;you&rdquo;.  &ldquo;Licensees&rdquo; and
 &ldquo;recipients&rdquo; may be individuals or organizations.</p>
@@ -135,7 +135,7 @@ produce the work, or an object code interpreter used to run it.</p>
 <p>The &ldquo;Corresponding Source&rdquo; for a work in object code form means all
 the source code needed to generate, install, and (for an executable
 work) run the object code and to modify the work, including scripts to
-control those activities.  However, it does not include the work's
+control those activities.  However, it does not include the work\'s
 System Libraries, or general-purpose tools or generally available free
 programs which are used unmodified in performing those activities but
 which are not part of the work.  For example, Corresponding Source
@@ -177,7 +177,7 @@ your copyrighted material outside their relationship with you.</p>
 the conditions stated below.  Sublicensing is not allowed; section 10
 makes it unnecessary.</p>
 
-<h4><a name="section3"></a>3. Protecting Users' Legal Rights From Anti-Circumvention Law.</h4>
+<h4><a name="section3"></a>3. Protecting Users\' Legal Rights From Anti-Circumvention Law.</h4>
 
 <p>No covered work shall be deemed part of an effective technological
 measure under any applicable law fulfilling obligations under article
@@ -189,13 +189,13 @@ measures.</p>
 circumvention of technological measures to the extent such circumvention
 is effected by exercising rights under this License with respect to
 the covered work, and you disclaim any intention to limit operation or
-modification of the work as a means of enforcing, against the work's
-users, your or third parties' legal rights to forbid circumvention of
+modification of the work as a means of enforcing, against the work\'s
+users, your or third parties\' legal rights to forbid circumvention of
 technological measures.</p>
 
 <h4><a name="section4"></a>4. Conveying Verbatim Copies.</h4>
 
-<p>You may convey verbatim copies of the Program's source code as you
+<p>You may convey verbatim copies of the Program\'s source code as you
 receive it, in any medium, provided that you conspicuously and
 appropriately publish on each copy an appropriate copyright notice;
 keep intact all notices stating that this License and any
@@ -240,7 +240,7 @@ works, which are not by their nature extensions of the covered work,
 and which are not combined with it such as to form a larger program,
 in or on a volume of a storage or distribution medium, is called an
 &ldquo;aggregate&rdquo; if the compilation and its resulting copyright are not
-used to limit the access or legal rights of the compilation's users
+used to limit the access or legal rights of the compilation\'s users
 beyond what the individual works permit.  Inclusion of a covered work
 in an aggregate does not cause this License to apply to the other
 parts of the aggregate.</p>
@@ -462,7 +462,7 @@ organization, or substantially all assets of one, or subdividing an
 organization, or merging organizations.  If propagation of a covered
 work results from an entity transaction, each party to that
 transaction who receives a copy of the work also receives whatever
-licenses to the work the party's predecessor in interest had or could
+licenses to the work the party\'s predecessor in interest had or could
 give under the previous paragraph, plus a right to possession of the
 Corresponding Source of the work from the predecessor in interest, if
 the predecessor has it or can get it with reasonable efforts.</p>
@@ -479,9 +479,9 @@ sale, or importing the Program or any portion of it.</p>
 
 <p>A &ldquo;contributor&rdquo; is a copyright holder who authorizes use under this
 License of the Program or a work on which the Program is based.  The
-work thus licensed is called the contributor's &ldquo;contributor version&rdquo;.</p>
+work thus licensed is called the contributor\'s &ldquo;contributor version&rdquo;.</p>
 
-<p>A contributor's &ldquo;essential patent claims&rdquo; are all patent claims
+<p>A contributor\'s &ldquo;essential patent claims&rdquo; are all patent claims
 owned or controlled by the contributor, whether already acquired or
 hereafter acquired, that would be infringed by some manner, permitted
 by this License, of making, using, or selling its contributor version,
@@ -492,7 +492,7 @@ patent sublicenses in a manner consistent with the requirements of
 this License.</p>
 
 <p>Each contributor grants you a non-exclusive, worldwide, royalty-free
-patent license under the contributor's essential patent claims, to
+patent license under the contributor\'s essential patent claims, to
 make, use, sell, offer for sale, import and otherwise run, modify and
 propagate the contents of its contributor version.</p>
 
@@ -513,10 +513,10 @@ patent license for this particular work, or (3) arrange, in a manner
 consistent with the requirements of this License, to extend the patent
 license to downstream recipients.  &ldquo;Knowingly relying&rdquo; means you have
 actual knowledge that, but for the patent license, your conveying the
-covered work in a country, or your recipient's use of the covered work
+covered work in a country, or your recipient\'s use of the covered work
 in a country, would infringe one or more identifiable patents in that
 country that you have reason to believe are valid.</p>
-  
+
 <p>If, pursuant to or in connection with a single transaction or
 arrangement, you convey, or propagate by procuring conveyance of, a
 covered work, and grant a patent license to some of the parties
@@ -544,7 +544,7 @@ or that patent license was granted, prior to 28 March 2007.</p>
 any implied license or other defenses to infringement that may
 otherwise be available to you under applicable patent law.</p>
 
-<h4><a name="section12"></a>12. No Surrender of Others' Freedom.</h4>
+<h4><a name="section12"></a>12. No Surrender of Others\' Freedom.</h4>
 
 <p>If conditions are imposed on you (whether by court order, agreement or
 otherwise) that contradict the conditions of this License, they do not
@@ -584,7 +584,7 @@ GNU General Public License, you may choose any version ever published
 by the Free Software Foundation.</p>
 
 <p>If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
+versions of the GNU General Public License can be used, that proxy\'s
 public statement of acceptance of a version permanently authorizes you
 to choose that version for the Program.</p>
 

app/src/main/assets/logging.properties

@@ -0,0 +1,4 @@
+
+# reduce verbose of some otherwise annoying ical4j messages
+net.fortuna.ical4j.data.level = INFO
+net.fortuna.ical4j.model.Recur.level = INFO

app/src/main/assets/mit.html

@@ -1,7 +0,0 @@
-<h3>The MIT License (MIT)</h3>
-
-<p>Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:</p>
-
-<p>The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.</p>
-
-<p>THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.</p>

app/src/main/assets/translators.json

@@ -0,0 +1 @@
+{"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/java/at/bitfire/davdroid/AccountSettings.java

@@ -1,464 +0,0 @@
-/*
- * Copyright © 2013 – 2015 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
- */
-package at.bitfire.davdroid;
-
-import android.accounts.Account;
-import android.accounts.AccountManager;
-import android.annotation.SuppressLint;
-import android.annotation.TargetApi;
-import android.app.Notification;
-import android.app.NotificationManager;
-import android.app.PendingIntent;
-import android.content.BroadcastReceiver;
-import android.content.ContentProviderClient;
-import android.content.ContentResolver;
-import android.content.ContentValues;
-import android.content.Context;
-import android.content.Intent;
-import android.content.PeriodicSync;
-import android.database.sqlite.SQLiteDatabase;
-import android.graphics.Bitmap;
-import android.graphics.drawable.BitmapDrawable;
-import android.graphics.drawable.Drawable;
-import android.os.Build;
-import android.os.Bundle;
-import android.provider.CalendarContract;
-import android.provider.ContactsContract;
-import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
-import android.support.v7.app.NotificationCompat;
-import android.text.TextUtils;
-
-import java.lang.reflect.Method;
-import java.util.HashSet;
-import java.util.List;
-import java.util.Set;
-import java.util.logging.Level;
-
-import at.bitfire.davdroid.model.ServiceDB;
-import at.bitfire.davdroid.model.ServiceDB.Collections;
-import at.bitfire.davdroid.model.ServiceDB.HomeSets;
-import at.bitfire.davdroid.model.ServiceDB.Services;
-import at.bitfire.davdroid.resource.LocalAddressBook;
-import at.bitfire.davdroid.resource.LocalCalendar;
-import at.bitfire.davdroid.resource.LocalTaskList;
-import at.bitfire.ical4android.CalendarStorageException;
-import at.bitfire.ical4android.TaskProvider;
-import at.bitfire.vcard4android.ContactsStorageException;
-import at.bitfire.vcard4android.GroupMethod;
-import lombok.Cleanup;
-import okhttp3.HttpUrl;
-
-public class AccountSettings {
-    private final static int CURRENT_VERSION = 4;
-    private final static String
-            KEY_SETTINGS_VERSION = "version",
-
-            KEY_USERNAME = "user_name",
-            KEY_AUTH_PREEMPTIVE = "auth_preemptive",
-
-            KEY_WIFI_ONLY = "wifi_only",            // sync on WiFi only (default: false)
-            KEY_WIFI_ONLY_SSID = "wifi_only_ssid";  // restrict sync to specific WiFi SSID
-
-    /** Whether to use RFC 6868 for VCards
-     *  value = null (not existing)      use RFC6868-style encoding (default value)
-     *          "0"                      don't use RFC 6868-style encoding
-     */
-    private final static String KEY_VCARD_RFC6868 = "vcard_rfc6868";
-
-    /** Time range limitation to the past [in days]
-        value = null            default value (DEFAULT_TIME_RANGE_PAST_DAYS)
-              < 0 (-1)          no limit
-              >= 0              entries more than n days in the past won't be synchronized
-     */
-    private final static String KEY_TIME_RANGE_PAST_DAYS = "time_range_past_days";
-    private final static int DEFAULT_TIME_RANGE_PAST_DAYS = 90;
-
-    /* Whether DAVdroid sets the local calendar color to the value from service DB at every sync
-       value = null (not existing)     true (default)
-               "0"                     false */
-    private final static String KEY_MANAGE_CALENDAR_COLORS = "manage_calendar_colors";
-
-    /** Contact group method:
-        value = null (not existing)     groups as separate VCards (default)
-                "CATEGORIES"            groups are per-contact CATEGORIES
-    */
-    private final static String KEY_CONTACT_GROUP_METHOD = "contact_group_method";
-
-    public final static long SYNC_INTERVAL_MANUALLY = -1;
-
-    final Context context;
-    final AccountManager accountManager;
-    final Account account;
-
-
-    @TargetApi(Build.VERSION_CODES.LOLLIPOP)
-    public AccountSettings(@NonNull Context context, @NonNull Account account) throws InvalidAccountException {
-        this.context = context;
-        this.account = account;
-
-        accountManager = AccountManager.get(context);
-
-        synchronized(AccountSettings.class) {
-            String versionStr = accountManager.getUserData(account, KEY_SETTINGS_VERSION);
-            if (versionStr == null)
-                throw new InvalidAccountException(account);
-
-            int version = 0;
-            try {
-                version = Integer.parseInt(versionStr);
-            } catch (NumberFormatException ignored) {
-            }
-            App.log.info("Account " + account.name + " has version " + version + ", current version: " + CURRENT_VERSION);
-
-            if (version < CURRENT_VERSION) {
-                Bitmap bitmapLogo = null;
-                Drawable drawableLogo = android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.LOLLIPOP ?
-                        context.getDrawable(R.drawable.ic_launcher) :
-                        context.getResources().getDrawable(R.drawable.ic_launcher);
-                if (drawableLogo instanceof BitmapDrawable)
-                    bitmapLogo = ((BitmapDrawable)drawableLogo).getBitmap();
-
-                Notification notify = new NotificationCompat.Builder(context)
-                        .setSmallIcon(R.drawable.ic_new_releases_light)
-                        .setLargeIcon(bitmapLogo)
-                        .setContentTitle(context.getString(R.string.settings_version_update))
-                        .setContentText(context.getString(R.string.settings_version_update_settings_updated))
-                        .setSubText(context.getString(R.string.settings_version_update_install_hint))
-                        .setStyle(new NotificationCompat.BigTextStyle()
-                                .bigText(context.getString(R.string.settings_version_update_settings_updated)))
-                        .setCategory(NotificationCompat.CATEGORY_SYSTEM)
-                        .setPriority(NotificationCompat.PRIORITY_HIGH)
-                        .setContentIntent(PendingIntent.getActivity(context, 0,
-                                new Intent(Intent.ACTION_VIEW, Constants.webUri.buildUpon().appendEncodedPath("faq/entry/davdroid-not-working-after-update/").build()),
-                                PendingIntent.FLAG_CANCEL_CURRENT))
-                        .setLocalOnly(true)
-                        .build();
-                NotificationManager nm = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);
-                nm.notify(Constants.NOTIFICATION_ACCOUNT_SETTINGS_UPDATED, notify);
-
-                update(version);
-            }
-        }
-    }
-
-    public static Bundle initialUserData(String userName, boolean preemptive) {
-        Bundle bundle = new Bundle();
-        bundle.putString(KEY_SETTINGS_VERSION, String.valueOf(CURRENT_VERSION));
-        bundle.putString(KEY_USERNAME, userName);
-        bundle.putString(KEY_AUTH_PREEMPTIVE, Boolean.toString(preemptive));
-        return bundle;
-    }
-
-
-    // authentication settings
-
-    public String username() { return accountManager.getUserData(account, KEY_USERNAME); }
-    public void username(@NonNull String userName) { accountManager.setUserData(account, KEY_USERNAME, userName); }
-
-    public String password() { return accountManager.getPassword(account); }
-    public void password(@NonNull String password) { accountManager.setPassword(account, password); }
-
-    public boolean preemptiveAuth() { return Boolean.parseBoolean(accountManager.getUserData(account, KEY_AUTH_PREEMPTIVE)); }
-    public void preemptiveAuth(boolean preemptive) { accountManager.setUserData(account, KEY_AUTH_PREEMPTIVE, Boolean.toString(preemptive)); }
-
-
-    // sync. settings
-
-    public Long getSyncInterval(@NonNull String authority) {
-        if (ContentResolver.getIsSyncable(account, authority) <= 0)
-            return null;
-
-        if (ContentResolver.getSyncAutomatically(account, authority)) {
-            List<PeriodicSync> syncs = ContentResolver.getPeriodicSyncs(account, authority);
-            if (syncs.isEmpty())
-                return SYNC_INTERVAL_MANUALLY;
-            else
-                return syncs.get(0).period;
-        } else
-            return SYNC_INTERVAL_MANUALLY;
-    }
-
-    public void setSyncInterval(@NonNull String authority, long seconds) {
-        if (seconds == SYNC_INTERVAL_MANUALLY) {
-            ContentResolver.setSyncAutomatically(account, authority, false);
-        } else {
-            ContentResolver.setSyncAutomatically(account, authority, true);
-            ContentResolver.addPeriodicSync(account, authority, new Bundle(), seconds);
-        }
-    }
-
-    public boolean getSyncWifiOnly() {
-        return accountManager.getUserData(account, KEY_WIFI_ONLY) != null;
-    }
-
-    public void setSyncWiFiOnly(boolean wiFiOnly) {
-        accountManager.setUserData(account, KEY_WIFI_ONLY, wiFiOnly ? "1" : null);
-    }
-
-    @Nullable
-    public String getSyncWifiOnlySSID() {
-        return accountManager.getUserData(account, KEY_WIFI_ONLY_SSID);
-    }
-
-    public void setSyncWifiOnlySSID(String ssid) {
-        accountManager.setUserData(account, KEY_WIFI_ONLY_SSID, ssid);
-    }
-
-
-    // CardDAV settings
-
-    public boolean getVCardRFC6868() {
-        return accountManager.getUserData(account, KEY_VCARD_RFC6868) == null;
-    }
-
-    public void setVCardRFC6868(boolean use) {
-        accountManager.setUserData(account, KEY_VCARD_RFC6868, use ? null : "0");
-    }
-
-
-    // CalDAV settings
-
-    @Nullable
-    public Integer getTimeRangePastDays() {
-        String strDays = accountManager.getUserData(account, KEY_TIME_RANGE_PAST_DAYS);
-        if (strDays != null) {
-            int days = Integer.valueOf(strDays);
-            return days < 0 ? null : days;
-        } else
-            return DEFAULT_TIME_RANGE_PAST_DAYS;
-    }
-
-    public void setTimeRangePastDays(@Nullable Integer days) {
-        accountManager.setUserData(account, KEY_TIME_RANGE_PAST_DAYS, String.valueOf(days == null ? -1 : days));
-    }
-
-    public boolean getManageCalendarColors() {
-        return accountManager.getUserData(account, KEY_MANAGE_CALENDAR_COLORS) == null;
-    }
-
-    public void setManageCalendarColors(boolean manage) {
-        accountManager.setUserData(account, KEY_MANAGE_CALENDAR_COLORS, manage ? null : "0");
-    }
-
-
-    // CardDAV settings
-
-    @NonNull
-    public GroupMethod getGroupMethod() {
-        final String name = accountManager.getUserData(account, KEY_CONTACT_GROUP_METHOD);
-        return name != null ?
-                GroupMethod.valueOf(name) :
-                GroupMethod.GROUP_VCARDS;
-    }
-
-    public void setGroupMethod(@NonNull GroupMethod method) {
-        final String name = method == GroupMethod.GROUP_VCARDS ? null : method.name();
-        accountManager.setUserData(account, KEY_CONTACT_GROUP_METHOD, name);
-    }
-
-
-    // update from previous account settings
-
-    private void update(int fromVersion) {
-        for (int toVersion = fromVersion + 1; toVersion <= CURRENT_VERSION; toVersion++) {
-            App.log.info("Updating account " + account.name + " from version " + fromVersion + " to " + toVersion);
-            try {
-                Method updateProc = getClass().getDeclaredMethod("update_" + fromVersion + "_" + toVersion);
-                updateProc.invoke(this);
-                accountManager.setUserData(account, KEY_SETTINGS_VERSION, String.valueOf(toVersion));
-            } catch (Exception e) {
-                App.log.log(Level.SEVERE, "Couldn't update account settings", e);
-            }
-            fromVersion = toVersion;
-        }
-    }
-
-    @SuppressWarnings({ "Recycle", "unused" })
-    private void update_1_2() throws ContactsStorageException {
-        /* - KEY_ADDRESSBOOK_URL ("addressbook_url"),
-           - KEY_ADDRESSBOOK_CTAG ("addressbook_ctag"),
-           - KEY_ADDRESSBOOK_VCARD_VERSION ("addressbook_vcard_version") are not used anymore (now stored in ContactsContract.SyncState)
-           - KEY_LAST_ANDROID_VERSION ("last_android_version") has been added
-        */
-
-        // move previous address book info to ContactsContract.SyncState
-        @Cleanup("release") ContentProviderClient provider = context.getContentResolver().acquireContentProviderClient(ContactsContract.AUTHORITY);
-        if (provider == null)
-            throw new ContactsStorageException("Couldn't access Contacts provider");
-
-        LocalAddressBook addr = new LocalAddressBook(account, provider);
-
-        // until now, ContactsContract.Settings.UNGROUPED_VISIBLE was not set explicitly
-        ContentValues values = new ContentValues();
-        values.put(ContactsContract.Settings.UNGROUPED_VISIBLE, 1);
-        addr.updateSettings(values);
-
-        String url = accountManager.getUserData(account, "addressbook_url");
-        if (!TextUtils.isEmpty(url))
-            addr.setURL(url);
-        accountManager.setUserData(account, "addressbook_url", null);
-
-        String cTag = accountManager.getUserData(account, "addressbook_ctag");
-        if (!TextUtils.isEmpty(cTag))
-            addr.setCTag(cTag);
-        accountManager.setUserData(account, "addressbook_ctag", null);
-    }
-
-    @SuppressWarnings({ "Recycle", "unused" })
-    private void update_2_3() {
-        // Don't show a warning for Android updates anymore
-        accountManager.setUserData(account, "last_android_version", null);
-
-        Long serviceCardDAV = null, serviceCalDAV = null;
-
-        ServiceDB.OpenHelper dbHelper = new ServiceDB.OpenHelper(context);
-        try {
-            SQLiteDatabase db = dbHelper.getWritableDatabase();
-            // we have to create the WebDAV Service database only from the old address book, calendar and task list URLs
-
-            // CardDAV: migrate address books
-            ContentProviderClient client = context.getContentResolver().acquireContentProviderClient(ContactsContract.AUTHORITY);
-            if (client != null)
-                try {
-                    LocalAddressBook addrBook = new LocalAddressBook(account, client);
-                    String url = addrBook.getURL();
-                    if (url != null) {
-                        App.log.fine("Migrating address book " + url);
-
-                        // insert CardDAV service
-                        ContentValues values = new ContentValues();
-                        values.put(Services.ACCOUNT_NAME, account.name);
-                        values.put(Services.SERVICE, Services.SERVICE_CARDDAV);
-                        serviceCardDAV = db.insert(Services._TABLE, null, values);
-
-                        // insert address book
-                        values.clear();
-                        values.put(Collections.SERVICE_ID, serviceCardDAV);
-                        values.put(Collections.URL, url);
-                        values.put(Collections.SYNC, 1);
-                        db.insert(Collections._TABLE, null, values);
-
-                        // insert home set
-                        HttpUrl homeSet = HttpUrl.parse(url).resolve("../");
-                        values.clear();
-                        values.put(HomeSets.SERVICE_ID, serviceCardDAV);
-                        values.put(HomeSets.URL, homeSet.toString());
-                        db.insert(HomeSets._TABLE, null, values);
-                    }
-
-                } catch (ContactsStorageException e) {
-                    App.log.log(Level.SEVERE, "Couldn't migrate address book", e);
-                } finally {
-                    client.release();
-                }
-
-            // CalDAV: migrate calendars + task lists
-            Set<String> collections = new HashSet<>();
-            Set<HttpUrl> homeSets = new HashSet<>();
-
-            client = context.getContentResolver().acquireContentProviderClient(CalendarContract.AUTHORITY);
-            if (client != null)
-                try {
-                    LocalCalendar calendars[] = (LocalCalendar[])LocalCalendar.find(account, client, LocalCalendar.Factory.INSTANCE, null, null);
-                    for (LocalCalendar calendar : calendars) {
-                        String url = calendar.getName();
-                        App.log.fine("Migrating calendar " + url);
-                        collections.add(url);
-                        homeSets.add(HttpUrl.parse(url).resolve("../"));
-                    }
-                } catch (CalendarStorageException e) {
-                    App.log.log(Level.SEVERE, "Couldn't migrate calendars", e);
-                } finally {
-                    client.release();
-                }
-
-            TaskProvider provider = LocalTaskList.acquireTaskProvider(context.getContentResolver());
-            if (provider != null)
-                try {
-                    LocalTaskList[] taskLists = (LocalTaskList[])LocalTaskList.find(account, provider, LocalTaskList.Factory.INSTANCE, null, null);
-                    for (LocalTaskList taskList : taskLists) {
-                        String url = taskList.getSyncId();
-                        App.log.fine("Migrating task list " + url);
-                        collections.add(url);
-                        homeSets.add(HttpUrl.parse(url).resolve("../"));
-                    }
-                } catch (CalendarStorageException e) {
-                    App.log.log(Level.SEVERE, "Couldn't migrate task lists", e);
-                } finally {
-                    provider.close();
-                }
-
-            if (!collections.isEmpty()) {
-                // insert CalDAV service
-                ContentValues values = new ContentValues();
-                values.put(Services.ACCOUNT_NAME, account.name);
-                values.put(Services.SERVICE, Services.SERVICE_CALDAV);
-                serviceCalDAV = db.insert(Services._TABLE, null, values);
-
-                // insert collections
-                for (String url : collections) {
-                    values.clear();
-                    values.put(Collections.SERVICE_ID, serviceCalDAV);
-                    values.put(Collections.URL, url);
-                    values.put(Collections.SYNC, 1);
-                    db.insert(Collections._TABLE, null, values);
-                }
-
-                // insert home sets
-                for (HttpUrl homeSet : homeSets) {
-                    values.clear();
-                    values.put(HomeSets.SERVICE_ID, serviceCalDAV);
-                    values.put(HomeSets.URL, homeSet.toString());
-                    db.insert(HomeSets._TABLE, null, values);
-                }
-            }
-        } finally {
-            dbHelper.close();
-        }
-
-        // initiate service detection (refresh) to get display names, colors etc.
-        Intent refresh = new Intent(context, DavService.class);
-        refresh.setAction(DavService.ACTION_REFRESH_COLLECTIONS);
-        if (serviceCardDAV != null) {
-            refresh.putExtra(DavService.EXTRA_DAV_SERVICE_ID, serviceCardDAV);
-            context.startService(refresh);
-        }
-        if (serviceCalDAV != null) {
-            refresh.putExtra(DavService.EXTRA_DAV_SERVICE_ID, serviceCalDAV);
-            context.startService(refresh);
-        }
-    }
-
-    @SuppressWarnings({ "Recycle", "unused" })
-    private void update_3_4() {
-        setGroupMethod(GroupMethod.CATEGORIES);
-    }
-
-
-    public static class AppUpdatedReceiver extends BroadcastReceiver {
-
-        @Override
-        @SuppressLint("UnsafeProtectedBroadcastReceiver")
-        public void onReceive(Context context, Intent intent) {
-            App.log.info("DAVdroid was updated, checking for AccountSettings version");
-
-            // peek into AccountSettings to initiate a possible migration
-            AccountManager accountManager = AccountManager.get(context);
-            for (Account account : accountManager.getAccountsByType(Constants.ACCOUNT_TYPE))
-                try {
-                    App.log.info("Checking account " + account.name);
-                    new AccountSettings(context, account);
-                } catch (InvalidAccountException e) {
-                    App.log.log(Level.SEVERE, "Couldn't check for updated account settings", e);
-                }
-        }
-
-    }
-
-}

app/src/main/java/at/bitfire/davdroid/AccountsChangedReceiver.java

@@ -1,43 +0,0 @@
-/*
- * Copyright © 2013 – 2016 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
- */
-
-package at.bitfire.davdroid;
-
-import android.accounts.OnAccountsUpdateListener;
-import android.content.BroadcastReceiver;
-import android.content.Context;
-import android.content.Intent;
-
-import java.util.LinkedList;
-import java.util.List;
-
-public class AccountsChangedReceiver extends BroadcastReceiver {
-
-    protected static final List<OnAccountsUpdateListener> listeners = new LinkedList<>();
-
-    @Override
-    public void onReceive(Context context, Intent intent) {
-        Intent serviceIntent = new Intent(context, DavService.class);
-        serviceIntent.setAction(DavService.ACTION_ACCOUNTS_UPDATED);
-        context.startService(serviceIntent);
-
-        for (OnAccountsUpdateListener listener : listeners)
-            listener.onAccountsUpdated(null);
-    }
-
-    public static void registerListener(OnAccountsUpdateListener listener, boolean callImmediately) {
-        listeners.add(listener);
-        if (callImmediately)
-            listener.onAccountsUpdated(null);
-    }
-
-    public static void unregisterListener(OnAccountsUpdateListener listener) {
-        listeners.remove(listener);
-    }
-
-}

app/src/main/java/at/bitfire/davdroid/App.java

@@ -1,145 +0,0 @@
-/*
- * Copyright © 2013 – 2016 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
- */
-
-package at.bitfire.davdroid;
-
-import android.app.Application;
-import android.app.NotificationManager;
-import android.content.BroadcastReceiver;
-import android.content.Context;
-import android.content.Intent;
-import android.graphics.drawable.BitmapDrawable;
-import android.support.v7.app.NotificationCompat;
-import android.util.Log;
-
-import org.apache.commons.lang3.time.DateFormatUtils;
-
-import java.io.File;
-import java.io.IOException;
-import java.util.logging.FileHandler;
-import java.util.logging.Handler;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import javax.net.ssl.HostnameVerifier;
-
-import at.bitfire.davdroid.log.LogcatHandler;
-import at.bitfire.davdroid.log.PlainTextFormatter;
-import at.bitfire.davdroid.model.ServiceDB;
-import at.bitfire.davdroid.model.Settings;
-import de.duenndns.ssl.MemorizingTrustManager;
-import lombok.Cleanup;
-import lombok.Getter;
-import okhttp3.internal.tls.OkHostnameVerifier;
-
-public class App extends Application {
-    public static final String FLAVOR_GOOGLE_PLAY = "gplay";
-
-    public static final String LOG_TO_EXTERNAL_STORAGE = "logToExternalStorage";
-
-    @Getter
-    private static MemorizingTrustManager memorizingTrustManager;
-
-    @Getter
-    private static SSLSocketFactoryCompat sslSocketFactoryCompat;
-
-    @Getter
-    private static HostnameVerifier hostnameVerifier;
-
-    public final static Logger log = Logger.getLogger("davdroid");
-    static {
-        at.bitfire.dav4android.Constants.log = Logger.getLogger("davdroid.dav4android");
-    }
-
-    @Override
-    public void onCreate() {
-        super.onCreate();
-
-        // initialize MemorizingTrustManager
-        memorizingTrustManager = new MemorizingTrustManager(this);
-        sslSocketFactoryCompat = new SSLSocketFactoryCompat(memorizingTrustManager);
-        hostnameVerifier = memorizingTrustManager.wrapHostnameVerifier(OkHostnameVerifier.INSTANCE);
-
-        // initializer logger
-        reinitLogger();
-    }
-
-    public void reinitLogger() {
-        // don't use Android default logging, we have our own handlers
-        log.setUseParentHandlers(false);
-
-        @Cleanup ServiceDB.OpenHelper dbHelper = new ServiceDB.OpenHelper(this);
-        Settings settings = new Settings(dbHelper.getReadableDatabase());
-
-        boolean logToFile = settings.getBoolean(LOG_TO_EXTERNAL_STORAGE, false),
-                logVerbose = logToFile || Log.isLoggable(log.getName(), Log.DEBUG);
-
-        // set logging level according to preferences
-        log.setLevel(logVerbose ? Level.ALL : Level.INFO);
-
-        // remove all handlers
-        for (Handler handler : log.getHandlers())
-            log.removeHandler(handler);
-
-        // add logcat handler
-        log.addHandler(LogcatHandler.INSTANCE);
-
-        NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
-        // log to external file according to preferences
-        if (logToFile) {
-            NotificationCompat.Builder builder = new NotificationCompat.Builder(this);
-            builder .setSmallIcon(R.drawable.ic_sd_storage_light)
-                    .setLargeIcon(((BitmapDrawable)getResources().getDrawable(R.drawable.ic_launcher)).getBitmap())
-                    .setContentTitle(getString(R.string.logging_davdroid_file_logging))
-                    .setLocalOnly(true);
-
-            File dir = getExternalFilesDir(null);
-            if (dir != null)
-                try {
-                    String fileName = new File(dir, "davdroid-" + android.os.Process.myPid() + "-" +
-                            DateFormatUtils.format(System.currentTimeMillis(), "yyyyMMdd-HHmmss") + ".txt").toString();
-                    log.info("Logging to " + fileName);
-
-                    FileHandler fileHandler = new FileHandler(fileName);
-                    fileHandler.setFormatter(PlainTextFormatter.DEFAULT);
-                    log.addHandler(fileHandler);
-                    builder .setContentText(dir.getPath())
-                            .setSubText(getString(R.string.logging_to_external_storage_warning))
-                            .setCategory(NotificationCompat.CATEGORY_STATUS)
-                            .setPriority(NotificationCompat.PRIORITY_HIGH)
-                            .setStyle(new NotificationCompat.BigTextStyle()
-                                    .bigText(getString(R.string.logging_to_external_storage, dir.getPath())))
-                            .setOngoing(true);
-
-                } catch (IOException e) {
-                    log.log(Level.SEVERE, "Couldn't create external log file", e);
-
-                    builder .setContentText(getString(R.string.logging_couldnt_create_file, e.getLocalizedMessage()))
-                            .setCategory(NotificationCompat.CATEGORY_ERROR);
-                }
-            else
-                builder.setContentText(getString(R.string.logging_no_external_storage));
-
-            nm.notify(Constants.NOTIFICATION_EXTERNAL_FILE_LOGGING, builder.build());
-        } else
-            nm.cancel(Constants.NOTIFICATION_EXTERNAL_FILE_LOGGING);
-    }
-
-
-    public static class ReinitLoggingReceiver extends BroadcastReceiver {
-
-        @Override
-        public void onReceive(Context context, Intent intent) {
-            log.info("Received broadcast: re-initializing logger");
-
-            App app = (App)context.getApplicationContext();
-            app.reinitLogger();
-        }
-
-    }
-}

app/src/main/java/at/bitfire/davdroid/ArrayUtils.java

@@ -1,33 +0,0 @@
-/*
- * Copyright © 2013 – 2015 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
- */
-package at.bitfire.davdroid;
-
-import java.lang.reflect.Array;
-
-public class ArrayUtils {
-
-	@SuppressWarnings("unchecked")
-	public static <T> T[][] partition(T[] bigArray, int max) {
-		int nItems = bigArray.length;
-		int nPartArrays = (nItems + max-1)/max;
-		
-		T[][] partArrays = (T[][])Array.newInstance(bigArray.getClass().getComponentType(), nPartArrays, 0); 
-		
-		// nItems is now the number of remaining items
-		for (int i = 0; nItems > 0; i++) {
-			int n = (nItems < max) ? nItems : max;
-			partArrays[i] = (T[])Array.newInstance(bigArray.getClass().getComponentType(), n); 
-			System.arraycopy(bigArray, i*max, partArrays[i], 0, n);
-			
-			nItems -= n;
-		}
-		
-		return partArrays;
-	}
-	
-}

app/src/main/java/at/bitfire/davdroid/Constants.java

@@ -1,29 +0,0 @@
-/*
- * Copyright © 2013 – 2015 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
- */
-package at.bitfire.davdroid;
-
-import android.net.Uri;
-
-public class Constants {
-
-	public static final String
-		ACCOUNT_TYPE = "bitfire.at.davdroid";
-
-    // notification IDs
-    public final static int
-            NOTIFICATION_ACCOUNT_SETTINGS_UPDATED = 0,
-            NOTIFICATION_EXTERNAL_FILE_LOGGING = 1,
-            NOTIFICATION_REFRESH_COLLECTIONS = 2,
-            NOTIFICATION_CONTACTS_SYNC = 10,
-            NOTIFICATION_CALENDAR_SYNC = 11,
-            NOTIFICATION_TASK_SYNC = 12,
-            NOTIFICATION_PERMISSIONS = 20;
-
-    public static final Uri webUri = Uri.parse("https://davdroid.bitfire.at/?pk_campaign=davdroid-app");
-
-}

app/src/main/java/at/bitfire/davdroid/DavService.java

@@ -1,427 +0,0 @@
-/*
- * Copyright © 2013 – 2016 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
- */
-
-package at.bitfire.davdroid;
-
-import android.accounts.Account;
-import android.accounts.AccountManager;
-import android.app.Notification;
-import android.app.NotificationManager;
-import android.app.PendingIntent;
-import android.app.Service;
-import android.content.ContentValues;
-import android.content.Intent;
-import android.database.Cursor;
-import android.database.DatabaseUtils;
-import android.database.sqlite.SQLiteDatabase;
-import android.graphics.drawable.BitmapDrawable;
-import android.os.Binder;
-import android.os.IBinder;
-import android.support.annotation.NonNull;
-import android.support.annotation.Nullable;
-import android.support.v7.app.NotificationCompat;
-import android.text.TextUtils;
-
-import org.apache.commons.collections4.iterators.IteratorChain;
-import org.apache.commons.collections4.iterators.SingletonIterator;
-
-import java.io.IOException;
-import java.lang.ref.WeakReference;
-import java.util.HashSet;
-import java.util.Iterator;
-import java.util.LinkedHashMap;
-import java.util.LinkedHashSet;
-import java.util.LinkedList;
-import java.util.List;
-import java.util.Map;
-import java.util.Set;
-import java.util.logging.Level;
-
-import at.bitfire.dav4android.DavResource;
-import at.bitfire.dav4android.UrlUtils;
-import at.bitfire.dav4android.exception.DavException;
-import at.bitfire.dav4android.exception.HttpException;
-import at.bitfire.dav4android.property.AddressbookHomeSet;
-import at.bitfire.dav4android.property.CalendarHomeSet;
-import at.bitfire.dav4android.property.CalendarProxyReadFor;
-import at.bitfire.dav4android.property.CalendarProxyWriteFor;
-import at.bitfire.dav4android.property.GroupMembership;
-import at.bitfire.davdroid.model.CollectionInfo;
-import at.bitfire.davdroid.model.ServiceDB.Collections;
-import at.bitfire.davdroid.model.ServiceDB.HomeSets;
-import at.bitfire.davdroid.model.ServiceDB.OpenHelper;
-import at.bitfire.davdroid.model.ServiceDB.Services;
-import at.bitfire.davdroid.ui.DebugInfoActivity;
-import lombok.Cleanup;
-import okhttp3.HttpUrl;
-import okhttp3.OkHttpClient;
-
-public class DavService extends Service {
-
-    public static final String
-            ACTION_ACCOUNTS_UPDATED = "accountsUpdated",
-            ACTION_REFRESH_COLLECTIONS = "refreshCollections",
-            EXTRA_DAV_SERVICE_ID = "davServiceID";
-
-    private final IBinder binder = new InfoBinder();
-
-    private final Set<Long> runningRefresh = new HashSet<>();
-    private final List<WeakReference<RefreshingStatusListener>> refreshingStatusListeners = new LinkedList<>();
-
-
-    @Override
-    public int onStartCommand(Intent intent, int flags, int startId) {
-        if (intent != null) {
-            String action = intent.getAction();
-            long id = intent.getLongExtra(EXTRA_DAV_SERVICE_ID, -1);
-
-            switch (action) {
-                case ACTION_ACCOUNTS_UPDATED:
-                    cleanupAccounts();
-                    break;
-                case ACTION_REFRESH_COLLECTIONS:
-                    if (runningRefresh.add(id)) {
-                        new Thread(new RefreshCollections(id)).start();
-                        for (WeakReference<RefreshingStatusListener> ref : refreshingStatusListeners) {
-                            RefreshingStatusListener listener = ref.get();
-                            if (listener != null)
-                                listener.onDavRefreshStatusChanged(id, true);
-                        }
-                    }
-                    break;
-            }
-        }
-
-        return START_NOT_STICKY;
-    }
-
-
-    /* BOUND SERVICE PART
-       for communicating with the activities
-    */
-
-    @Override
-    public IBinder onBind(Intent intent) {
-        return binder;
-    }
-
-    public interface RefreshingStatusListener {
-        void onDavRefreshStatusChanged(long id, boolean refreshing);
-    }
-
-    public class InfoBinder extends Binder {
-        public boolean isRefreshing(long id) {
-            return runningRefresh.contains(id);
-        }
-
-        public void addRefreshingStatusListener(@NonNull RefreshingStatusListener listener, boolean callImmediate) {
-            refreshingStatusListeners.add(new WeakReference<>(listener));
-            if (callImmediate)
-                for (long id : runningRefresh)
-                    listener.onDavRefreshStatusChanged(id, true);
-        }
-
-        public void removeRefreshingStatusListener(@NonNull RefreshingStatusListener listener) {
-            for (Iterator<WeakReference<RefreshingStatusListener>> iterator = refreshingStatusListeners.iterator(); iterator.hasNext(); ) {
-                RefreshingStatusListener item = iterator.next().get();
-                if (listener.equals(item))
-                    iterator.remove();
-            }
-        }
-    }
-
-
-    /* ACTION RUNNABLES
-       which actually do the work
-     */
-
-    void cleanupAccounts() {
-        App.log.info("Cleaning up orphaned accounts");
-
-        final OpenHelper dbHelper = new OpenHelper(this);
-        try {
-            SQLiteDatabase db = dbHelper.getWritableDatabase();
-
-            List<String> sqlAccountNames = new LinkedList<>();
-            AccountManager am = AccountManager.get(this);
-            for (Account account : am.getAccountsByType(Constants.ACCOUNT_TYPE))
-                sqlAccountNames.add(DatabaseUtils.sqlEscapeString(account.name));
-
-            if (sqlAccountNames.isEmpty())
-                db.delete(Services._TABLE, null, null);
-            else
-                db.delete(Services._TABLE, Services.ACCOUNT_NAME + " NOT IN (" + TextUtils.join(",", sqlAccountNames) + ")", null);
-        } finally {
-            dbHelper.close();
-        }
-    }
-
-    private class RefreshCollections implements Runnable {
-        final long service;
-        final OpenHelper dbHelper;
-        SQLiteDatabase db;
-
-        RefreshCollections(long davServiceId) {
-            this.service = davServiceId;
-            dbHelper = new OpenHelper(DavService.this);
-        }
-
-        @Override
-        public void run() {
-            Account account = null;
-
-            try {
-                db = dbHelper.getWritableDatabase();
-
-                String serviceType = serviceType();
-                App.log.info("Refreshing " + serviceType + " collections of service #" + service);
-
-                // get account
-                account = account();
-
-                // create authenticating OkHttpClient (credentials taken from account settings)
-                OkHttpClient httpClient = HttpClient.create(DavService.this, account);
-
-                // refresh home sets: principal
-                Set<HttpUrl> homeSets = readHomeSets();
-                HttpUrl principal = readPrincipal();
-                if (principal != null) {
-                    App.log.fine("Querying principal for home sets");
-                    DavResource dav = new DavResource(httpClient, principal);
-                    queryHomeSets(serviceType, dav, homeSets);
-
-                    // refresh home sets: calendar-proxy-read/write-for
-                    CalendarProxyReadFor proxyRead = (CalendarProxyReadFor)dav.properties.get(CalendarProxyReadFor.NAME);
-                    if (proxyRead != null)
-                        for (String href : proxyRead.principals) {
-                            App.log.fine("Principal is a read-only proxy for " + href + ", checking for home sets");
-                            queryHomeSets(serviceType, new DavResource(httpClient, dav.location.resolve(href)), homeSets);
-                        }
-                    CalendarProxyWriteFor proxyWrite = (CalendarProxyWriteFor)dav.properties.get(CalendarProxyWriteFor.NAME);
-                    if (proxyWrite != null)
-                        for (String href : proxyWrite.principals) {
-                            App.log.fine("Principal is a read-write proxy for " + href + ", checking for home sets");
-                            queryHomeSets(serviceType, new DavResource(httpClient, dav.location.resolve(href)), homeSets);
-                        }
-
-                    // refresh home sets: direct group memberships
-                    GroupMembership groupMembership = (GroupMembership)dav.properties.get(GroupMembership.NAME);
-                    if (groupMembership != null)
-                        for (String href : groupMembership.hrefs) {
-                            App.log.fine("Principal is member of group " + href + ", checking for home sets");
-                            DavResource group = new DavResource(httpClient, dav.location.resolve(href));
-                            try {
-                                queryHomeSets(serviceType, group, homeSets);
-                            } catch(HttpException|DavException e) {
-                                App.log.log(Level.WARNING, "Couldn't query member group ", e);
-                            }
-                        }
-                }
-
-                // now refresh collections (taken from home sets)
-                Map<HttpUrl, CollectionInfo> collections = readCollections();
-
-                // (remember selections before)
-                Set<HttpUrl> selectedCollections = new HashSet<>();
-                for (CollectionInfo info : collections.values())
-                    if (info.selected)
-                        selectedCollections.add(HttpUrl.parse(info.url));
-
-                for (Iterator<HttpUrl> itHomeSets = homeSets.iterator(); itHomeSets.hasNext(); ) {
-                    HttpUrl homeSet = itHomeSets.next();
-                    App.log.fine("Listing home set " + homeSet);
-
-                    DavResource dav = new DavResource(httpClient, homeSet);
-                    try {
-                        dav.propfind(1, CollectionInfo.DAV_PROPERTIES);
-                        IteratorChain<DavResource> itCollections = new IteratorChain<>(dav.members.iterator(), new SingletonIterator(dav));
-                        while (itCollections.hasNext()) {
-                            DavResource member = itCollections.next();
-                            CollectionInfo info = CollectionInfo.fromDavResource(member);
-                            info.confirmed = true;
-                            App.log.log(Level.FINE, "Found collection", info);
-
-                            if ((serviceType.equals(Services.SERVICE_CARDDAV) && info.type == CollectionInfo.Type.ADDRESS_BOOK) ||
-                                (serviceType.equals(Services.SERVICE_CALDAV) && info.type == CollectionInfo.Type.CALENDAR))
-                                collections.put(member.location, info);
-                        }
-                    } catch(HttpException e) {
-                        if (e.status == 403 || e.status == 404 || e.status == 410)
-                            // delete home set only if it was not accessible (40x)
-                            itHomeSets.remove();
-                    }
-                }
-
-                // check/refresh unconfirmed collections
-                for (Iterator<Map.Entry<HttpUrl, CollectionInfo>> iterator = collections.entrySet().iterator(); iterator.hasNext(); ) {
-                    Map.Entry<HttpUrl, CollectionInfo> entry = iterator.next();
-                    HttpUrl url = entry.getKey();
-                    CollectionInfo info = entry.getValue();
-
-                    if (!info.confirmed)
-                        try {
-                            DavResource dav = new DavResource(httpClient, url);
-                            dav.propfind(0, CollectionInfo.DAV_PROPERTIES);
-                            info = CollectionInfo.fromDavResource(dav);
-                            info.confirmed = true;
-
-                            // remove unusable collections
-                            if ((serviceType.equals(Services.SERVICE_CARDDAV) && info.type != CollectionInfo.Type.ADDRESS_BOOK) ||
-                                (serviceType.equals(Services.SERVICE_CALDAV) && info.type != CollectionInfo.Type.CALENDAR))
-                                iterator.remove();
-                        } catch(HttpException e) {
-                            if (e.status == 403 || e.status == 404 || e.status == 410)
-                                // delete collection only if it was not accessible (40x)
-                                iterator.remove();
-                            else
-                                throw e;
-                        }
-                }
-
-                // restore selections
-                for (HttpUrl url : selectedCollections) {
-                    CollectionInfo info = collections.get(url);
-                    if (info != null)
-                        info.selected = true;
-                }
-
-                try {
-                    db.beginTransactionNonExclusive();
-                    saveHomeSets(homeSets);
-                    saveCollections(collections.values());
-                    db.setTransactionSuccessful();
-                } finally {
-                    db.endTransaction();
-                }
-
-            } catch(InvalidAccountException e) {
-                App.log.log(Level.SEVERE, "Invalid account", e);
-            } catch(IOException|HttpException|DavException e) {
-                App.log.log(Level.SEVERE, "Couldn't refresh collection list", e);
-
-                Intent debugIntent = new Intent(DavService.this, DebugInfoActivity.class);
-                debugIntent.putExtra(DebugInfoActivity.KEY_THROWABLE, e);
-                if (account != null)
-                    debugIntent.putExtra(DebugInfoActivity.KEY_ACCOUNT, account);
-
-                NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE);
-                Notification notify = new NotificationCompat.Builder(DavService.this)
-                        .setSmallIcon(R.drawable.ic_error_light)
-                        .setLargeIcon(((BitmapDrawable)getResources().getDrawable(R.drawable.ic_launcher)).getBitmap())
-                        .setContentTitle(getString(R.string.dav_service_refresh_failed))
-                        .setContentText(getString(R.string.dav_service_refresh_couldnt_refresh))
-                        .setContentIntent(PendingIntent.getActivity(DavService.this, 0, debugIntent, PendingIntent.FLAG_UPDATE_CURRENT))
-                        .build();
-                nm.notify(Constants.NOTIFICATION_REFRESH_COLLECTIONS, notify);
-            } finally {
-                dbHelper.close();
-
-                runningRefresh.remove(service);
-                for (WeakReference<RefreshingStatusListener> ref : refreshingStatusListeners) {
-                    RefreshingStatusListener listener = ref.get();
-                    if (listener != null)
-                        listener.onDavRefreshStatusChanged(service, false);
-                }
-            }
-        }
-
-        /**
-         * Checks if the given URL defines home sets and adds them to the home set list.
-         * @param serviceType       CalDAV/CardDAV (calendar home set / addressbook home set)
-         * @param dav               DavResource to check
-         * @param homeSets          set where found home set URLs will be put into
-         */
-        private void queryHomeSets(String serviceType, DavResource dav, Set<HttpUrl> homeSets) throws IOException, HttpException, DavException {
-            if (Services.SERVICE_CARDDAV.equals(serviceType)) {
-                dav.propfind(0, AddressbookHomeSet.NAME, GroupMembership.NAME);
-                AddressbookHomeSet addressbookHomeSet = (AddressbookHomeSet)dav.properties.get(AddressbookHomeSet.NAME);
-                if (addressbookHomeSet != null)
-                    for (String href : addressbookHomeSet.hrefs)
-                        homeSets.add(UrlUtils.withTrailingSlash(dav.location.resolve(href)));
-            } else if (Services.SERVICE_CALDAV.equals(serviceType)) {
-                dav.propfind(0, CalendarHomeSet.NAME, CalendarProxyReadFor.NAME, CalendarProxyWriteFor.NAME, GroupMembership.NAME);
-                CalendarHomeSet calendarHomeSet = (CalendarHomeSet)dav.properties.get(CalendarHomeSet.NAME);
-                if (calendarHomeSet != null)
-                    for (String href : calendarHomeSet.hrefs)
-                        homeSets.add(UrlUtils.withTrailingSlash(dav.location.resolve(href)));
-            }
-        }
-
-
-        @NonNull
-        private Account account() {
-            @Cleanup Cursor cursor = db.query(Services._TABLE, new String[] { Services.ACCOUNT_NAME }, Services.ID + "=?", new String[] { String.valueOf(service) }, null, null, null);
-            if (cursor.moveToNext()) {
-                return new Account(cursor.getString(0), Constants.ACCOUNT_TYPE);
-            } else
-                throw new IllegalArgumentException("Service not found");
-        }
-
-        @NonNull
-        private String serviceType() {
-            @Cleanup Cursor cursor = db.query(Services._TABLE, new String[] { Services.SERVICE }, Services.ID + "=?", new String[] { String.valueOf(service) }, null, null, null);
-            if (cursor.moveToNext())
-                return cursor.getString(0);
-            else
-                throw new IllegalArgumentException("Service not found");
-        }
-
-        @Nullable
-        private HttpUrl readPrincipal() {
-            @Cleanup Cursor cursor = db.query(Services._TABLE, new String[] { Services.PRINCIPAL }, Services.ID + "=?", new String[] { String.valueOf(service) }, null, null, null);
-            if (cursor.moveToNext()) {
-                String principal = cursor.getString(0);
-                if (principal != null)
-                    return HttpUrl.parse(cursor.getString(0));
-            }
-            return null;
-        }
-
-        @NonNull
-        private Set<HttpUrl> readHomeSets() {
-            Set<HttpUrl> homeSets = new LinkedHashSet<>();
-            @Cleanup Cursor cursor = db.query(HomeSets._TABLE, new String[] { HomeSets.URL }, HomeSets.SERVICE_ID + "=?", new String[] { String.valueOf(service) }, null, null, null);
-            while (cursor.moveToNext())
-                homeSets.add(HttpUrl.parse(cursor.getString(0)));
-            return homeSets;
-        }
-
-        private void saveHomeSets(Set<HttpUrl> homeSets) {
-            db.delete(HomeSets._TABLE, HomeSets.SERVICE_ID + "=?", new String[] { String.valueOf(service) });
-            for (HttpUrl homeSet : homeSets) {
-                ContentValues values = new ContentValues(1);
-                values.put(HomeSets.SERVICE_ID, service);
-                values.put(HomeSets.URL, homeSet.toString());
-                db.insertOrThrow(HomeSets._TABLE, null, values);
-            }
-        }
-
-        @NonNull
-        private Map<HttpUrl, CollectionInfo> readCollections() {
-            Map<HttpUrl, CollectionInfo> collections = new LinkedHashMap<>();
-            @Cleanup Cursor cursor = db.query(Collections._TABLE, null, Collections.SERVICE_ID + "=?", new String[]{String.valueOf(service)}, null, null, null);
-            while (cursor.moveToNext()) {
-                ContentValues values = new ContentValues();
-                DatabaseUtils.cursorRowToContentValues(cursor, values);
-                collections.put(HttpUrl.parse(values.getAsString(Collections.URL)), CollectionInfo.fromDB(values));
-            }
-            return collections;
-        }
-
-        private void saveCollections(Iterable<CollectionInfo> collections) {
-            db.delete(Collections._TABLE, HomeSets.SERVICE_ID + "=?", new String[] { String.valueOf(service) });
-            for (CollectionInfo collection : collections) {
-                ContentValues values = collection.toDB();
-                App.log.log(Level.FINE, "Saving collection", values);
-                values.put(Collections.SERVICE_ID, service);
-                db.insertWithOnConflict(Collections._TABLE, null, values, SQLiteDatabase.CONFLICT_REPLACE);
-            }
-        }
-    }
-
-}

app/src/main/java/at/bitfire/davdroid/DavUtils.java

@@ -1,41 +0,0 @@
-/*
- * Copyright © 2013 – 2015 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
- */
-
-package at.bitfire.davdroid;
-
-import android.support.annotation.NonNull;
-
-import org.apache.commons.lang3.StringUtils;
-
-import java.util.Collections;
-import java.util.LinkedList;
-import java.util.List;
-
-import okhttp3.HttpUrl;
-
-public class DavUtils {
-
-    public static String ARGBtoCalDAVColor(int colorWithAlpha) {
-        byte alpha = (byte)(colorWithAlpha >> 24);
-        int color = colorWithAlpha & 0xFFFFFF;
-        return String.format("#%06X%02X", color, alpha);
-    }
-
-    public static String lastSegmentOfUrl(@NonNull String url) {
-        // the list returned by HttpUrl.pathSegments() is unmodifiable, so we have to create a copy
-        List<String> segments = new LinkedList<>(HttpUrl.parse(url).pathSegments());
-        Collections.reverse(segments);
-
-        for (String segment : segments)
-            if (!StringUtils.isEmpty(segment))
-                return segment;
-
-        return "/";
-    }
-
-}

app/src/main/java/at/bitfire/davdroid/HttpClient.java

@@ -1,157 +0,0 @@
-/*
- * Copyright © 2013 – 2015 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
- */
-
-package at.bitfire.davdroid;
-
-import android.accounts.Account;
-import android.content.Context;
-import android.os.Build;
-import android.support.annotation.NonNull;
-
-import java.io.IOException;
-import java.text.SimpleDateFormat;
-import java.util.Date;
-import java.util.Locale;
-import java.util.concurrent.TimeUnit;
-import java.util.logging.Level;
-import java.util.logging.Logger;
-
-import at.bitfire.dav4android.BasicDigestAuthenticator;
-import lombok.RequiredArgsConstructor;
-import okhttp3.Credentials;
-import okhttp3.Interceptor;
-import okhttp3.OkHttpClient;
-import okhttp3.Request;
-import okhttp3.Response;
-import okhttp3.logging.HttpLoggingInterceptor;
-
-public class HttpClient {
-    private static final OkHttpClient client = new OkHttpClient();
-    private static final UserAgentInterceptor userAgentInterceptor = new UserAgentInterceptor();
-
-    private static final String userAgent;
-    static {
-        String date = new SimpleDateFormat("yyyy/MM/dd", Locale.US).format(new Date(BuildConfig.buildTime));
-        userAgent = "DAVdroid/" + BuildConfig.VERSION_NAME + " (" + date + "; dav4android; okhttp3) Android/" + Build.VERSION.RELEASE;
-    }
-
-    private HttpClient() {
-    }
-
-    public static OkHttpClient create(@NonNull Context context, @NonNull Account account, @NonNull final Logger logger) throws InvalidAccountException {
-        OkHttpClient.Builder builder = defaultBuilder(logger);
-
-        // use account settings for authentication and logging
-        AccountSettings settings = new AccountSettings(context, account);
-
-        if (settings.preemptiveAuth())
-            builder.addNetworkInterceptor(new PreemptiveAuthenticationInterceptor(settings.username(), settings.password()));
-        else
-            builder.authenticator(new BasicDigestAuthenticator(null, settings.username(), settings.password()));
-
-        return builder.build();
-    }
-
-    public static OkHttpClient create(@NonNull Logger logger) {
-        return defaultBuilder(logger).build();
-    }
-
-    public static OkHttpClient create(@NonNull Context context, @NonNull Account account) throws InvalidAccountException {
-        return create(context, account, App.log);
-    }
-
-    public static OkHttpClient create() {
-        return create(App.log);
-    }
-
-    private static OkHttpClient.Builder defaultBuilder(@NonNull final Logger logger) {
-        OkHttpClient.Builder builder = client.newBuilder();
-
-        // use MemorizingTrustManager to manage self-signed certificates
-        if (App.getSslSocketFactoryCompat() != null)
-            builder.sslSocketFactory(App.getSslSocketFactoryCompat(), App.getMemorizingTrustManager());
-        if (App.getHostnameVerifier() != null)
-            builder.hostnameVerifier(App.getHostnameVerifier());
-
-        // set timeouts
-        builder.connectTimeout(30, TimeUnit.SECONDS);
-        builder.writeTimeout(30, TimeUnit.SECONDS);
-        builder.readTimeout(120, TimeUnit.SECONDS);
-
-        // don't allow redirects, because it would break PROPFIND handling
-        builder.followRedirects(false);
-
-        // add User-Agent to every request
-        builder.addNetworkInterceptor(userAgentInterceptor);
-
-        // add cookie store for non-persistent cookies (some services like Horde use cookies for session tracking)
-        builder.cookieJar(new MemoryCookieStore());
-
-        // add network logging, if requested
-        if (logger.isLoggable(Level.FINEST)) {
-            HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor(new HttpLoggingInterceptor.Logger() {
-                @Override
-                public void log(String message) {
-                    logger.finest(message);
-                }
-            });
-            loggingInterceptor.setLevel(HttpLoggingInterceptor.Level.BODY);
-            builder.addInterceptor(loggingInterceptor);
-        }
-
-        return builder;
-    }
-
-    private static OkHttpClient.Builder addAuthentication(@NonNull OkHttpClient.Builder builder, @NonNull String username, @NonNull String password, boolean preemptive) {
-        if (preemptive)
-            builder.addNetworkInterceptor(new PreemptiveAuthenticationInterceptor(username, password));
-        else
-            builder.authenticator(new BasicDigestAuthenticator(null, username, password));
-        return builder;
-    }
-
-    public static OkHttpClient addAuthentication(@NonNull OkHttpClient client, @NonNull String username, @NonNull String password, boolean preemptive) {
-        OkHttpClient.Builder builder = client.newBuilder();
-        addAuthentication(builder, username, password, preemptive);
-        return builder.build();
-    }
-
-    public static OkHttpClient addAuthentication(@NonNull OkHttpClient client, @NonNull String host, @NonNull String username, @NonNull String password) {
-        return client.newBuilder()
-                .authenticator(new BasicDigestAuthenticator(host, username, password))
-                .build();
-    }
-
-
-    static class UserAgentInterceptor implements Interceptor {
-        @Override
-        public Response intercept(Chain chain) throws IOException {
-            Locale locale = Locale.getDefault();
-            Request request = chain.request().newBuilder()
-                    .header("User-Agent", userAgent)
-                    .header("Accept-Language", locale.getLanguage() + "-" + locale.getCountry() + ", " + locale.getLanguage() + ";q=0.7, *;q=0.5")
-                    .build();
-            return chain.proceed(request);
-        }
-    }
-
-    @RequiredArgsConstructor
-    static class PreemptiveAuthenticationInterceptor implements Interceptor {
-        final String username, password;
-
-        @Override
-        public Response intercept(Chain chain) throws IOException {
-            App.log.fine("Adding basic authorization header for user " + username);
-            Request request = chain.request().newBuilder()
-                    .header("Authorization", Credentials.basic(username, password))
-                    .build();
-            return chain.proceed(request);
-        }
-    }
-
-}

app/src/main/java/at/bitfire/davdroid/InvalidAccountException.java

@@ -1,19 +0,0 @@
-/*
- * Copyright © 2013 – 2016 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
- */
-
-package at.bitfire.davdroid;
-
-import android.accounts.Account;
-
-public class InvalidAccountException extends Exception {
-
-    public InvalidAccountException(Account account) {
-        super("Invalid account: " + account);
-    }
-
-}