By user request, other Serilog.Sink packages are included for experimental use

Bump docker/build-push-action from 5 to 6

.github/workflows/build-linux.yml

@@ -33,7 +33,7 @@ on:
 
 env:
   DOTNET_CONFIGURATION: 'Release'
-  DOTNET_VERSION: '7.0.x'
+  DOTNET_VERSION: '8.0.x'
   RELEASE_NAME: 'chardonnay'
 
 jobs:
@@ -41,9 +41,9 @@ jobs:
     name: '${{ inputs.OS }}-${{ inputs.architecture }}'
     runs-on: ${{ inputs.runs_on }}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Setup .NET
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
         with:
           dotnet-version: ${{ env.DOTNET_VERSION }}
         env:
@@ -124,7 +124,7 @@ jobs:
           echo "artifact=${artifact}" >> "${GITHUB_OUTPUT}"
           
       - name: Publish bundle
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ steps.bundle.outputs.artifact }}
           path: ./Source/bin/Publish/bundle/${{ steps.bundle.outputs.artifact }}

.github/workflows/build-windows.yml

@@ -18,7 +18,7 @@ on:
 
 env:
   DOTNET_CONFIGURATION: 'Release'
-  DOTNET_VERSION: '7.0.x'
+  DOTNET_VERSION: '8.0.x'
 
 jobs:
   build:
@@ -35,9 +35,9 @@ jobs:
             release_name: classic
             prefix: Classic-
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - name: Setup .NET
-        uses: actions/setup-dotnet@v3
+        uses: actions/setup-dotnet@v4
         with:
           dotnet-version: ${{ env.DOTNET_VERSION }}
         env:
@@ -107,7 +107,7 @@ jobs:
           Compress-Archive -Path "${bin_dir}*" -DestinationPath "$artifact.zip"
 
       - name: Publish artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ steps.zip.outputs.artifact }}.zip
           path: ./Source/bin/Publish/${{ steps.zip.outputs.artifact }}.zip

.github/workflows/docker.yml

@@ -24,22 +24,22 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Set up QEMU
-        uses: docker/setup-qemu-action@v2
+        uses: docker/setup-qemu-action@v3
 
       - name: Set up Docker Buildx
-        uses: docker/setup-buildx-action@v2
+        uses: docker/setup-buildx-action@v3
 
       - name: Login to Docker Hub
-        uses: docker/login-action@v2
+        uses: docker/login-action@v3
         with:
           username: ${{ secrets.docker_username }}
           password: ${{ secrets.docker_token }}
 
       - name: Build and push
-        uses: docker/build-push-action@v4
+        uses: docker/build-push-action@v6
         with:
           push: true
           build-args: 'FOLDER_NAME=Linux-chardonnay'

.github/workflows/release.yml

@@ -39,13 +39,13 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download artifacts
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           path: artifacts
 
       - name: Release
         id: release
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@v2
         with:
           name: Libation v${{ needs.prerelease.outputs.version }}
           body: <Put a body here>
@@ -53,7 +53,7 @@ jobs:
           prerelease: false
 
       - name: Upload release assets
-        uses: dwenegar/upload-release-assets@v1
+        uses: dwenegar/upload-release-assets@v2
         env:
           GITHUB_TOKEN: '${{ secrets.GITHUB_TOKEN }}'
         with:

Dockerfile

@@ -1,12 +1,12 @@
 # Dockerfile
-FROM mcr.microsoft.com/dotnet/sdk:7.0 as build-env
+FROM mcr.microsoft.com/dotnet/sdk:8.0 as build-env
 
 COPY Source /Source
 RUN dotnet publish -c Release -o /Source/bin/Publish/Linux-chardonnay /Source/LibationCli/LibationCli.csproj -p:PublishProfile=/Source/LibationCli/Properties/PublishProfiles/LinuxProfile.pubxml
 COPY Docker/liberate.sh /Source/bin/Publish/Linux-chardonnay
 
 
-FROM mcr.microsoft.com/dotnet/runtime:7.0
+FROM mcr.microsoft.com/dotnet/runtime:8.0
 
 ENV SLEEP_TIME "30m"
 

Documentation/Advanced.md

@@ -1,6 +1,6 @@
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/MBucari?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 

Documentation/Docker.md

@@ -1,10 +1,11 @@
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/MBucari?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 
-### Disclaimer
+
+# Disclaimer
 The docker image is provided as-is. We hope it can be useful to you but it is not officially supported.
 
 ### Setup
@@ -12,7 +13,15 @@ In order to use the docker image, you'll need to provide it with a copy of the `
 
 In Settings.json, make the following changes:
 * Change `Books` to `/data`
-* Change `InProgress` to `/tmp`
+* Change `InProgress` to `/tmp` *
+
+*You may have to paste the following at the end of your your Settings.json file if `InProgess` is not present:
+
+```
+  "InProgress": "/tmp"
+```
+![image](https://github.com/patienttruth/Libation/assets/105557996/cf65a108-cadf-4284-9000-e7672c99c59b)
+
 
 ### Running
 Once the configuration files are copied and edited, the docker image can be run with the following command.

Documentation/FrequentlyAskedQuestions.md

@@ -0,0 +1,38 @@
+## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
+
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
+...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
+
+
+
+# Frequently Asked Questions
+
+## Q: What's the difference between 'Classic' and 'Chardonnay'?
+
+**A:** First and most importantly: Classic and Chardonnay have the exact same features.
+
+* **Classic** is Windows only. Its older 'grey boxes' look has a compact design which allows for more information on the screen. Notably, Classic was written using an older, more mature technology which has built-in support for screenreaders.
+
+* **Chardonnay** is available for Windows, Mac, and Linux. Its modern design has a more open look and feel.
+
+## Q: Now that I've downloaded my books, how can I listen to them?
+
+**A:** You can use any app which plays m4b files (or mp3 files if you used that setting). Here are just a few ideas. Disclaimer: I have no affiliation with any of these companies:
+
+* iOS: [BookPlayer](https://apps.apple.com/us/app/bookplayer/id1138219998)
+* iOS: [Bound](https://apps.apple.com/us/app/bound-audiobook-player/id1041727137)
+* Android: [Smart AudioBook Player](https://play.google.com/store/apps/details?id=ak.alizandro.smartaudiobookplayer&hl=en_US&gl=US)
+* Android: [Listen](https://play.google.com/store/apps/details?id=ru.litres.android.audio&hl=en_US&gl=US)
+* Desktop: [VLC](https://www.videolan.org/)
+* Windows Desktop: [Audibly](https://github.com/rstewa/Audibly) -- a desktop player build specifically for audiobooks
+
+Self-hosting online:
+
+* [audiobookshelf](https://www.audiobookshelf.org). On [reddit](https://www.reddit.com/r/audiobookshelf/)
+* [plex](https://www.plex.tv/). Listen with [Prologue](https://prologue.audio/) (iOS)
+
+## Q: How do I use Libation with a South Africa account?
+
+**A:** Like many countries, amazon gives South Africa it's own amazon site. [Unlike many other regions](https://www.audible.com/ep/country-selector) there is not South Africa specific audible site. Use `US` for your region -- ie: audible.com.
+
+(Not exactly a *frequently* asked question but it's come up more than once)

Documentation/GettingStarted.md

@@ -1,6 +1,6 @@
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/MBucari?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 

Documentation/InstallOnLinux.md

@@ -1,15 +1,16 @@
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/MBucari?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 
-### Install and Run Libation on Ubuntu
+
+# Install and Run Libation on Ubuntu
 
 New Libation releases are automatically packed into .deb and .rpm package and are available from the Libation repository's releases page.
 
 
-Run this command in your terminal to dowbnload and install Libation, replacing the url with the latest Libation package url:
+Run this command in your terminal to download and install Libation, replacing the url with the latest Libation package url:
 
 - Debian
   ```Console

Documentation/InstallOnMac.md

@@ -1,9 +1,10 @@
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/MBucari?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 
+
 # Run Libation on MacOS
 This walkthrough should get you up and running with Libation on your Mac.
 
@@ -23,6 +24,17 @@ This walkthrough should get you up and running with Libation on your Mac.
   ```  
 - Close the terminal and use Libation!
 
+## Troubleshooting
+
+If Libation fails to start after completing the above steps, try the following:
+
+1. Right-click the Libation app in your applications folder and select _Show Package Contents_
+2. Open the `Contents` folder and then the `MacOS` folder.
+3. Find the file named `Libation`, right-click it, and then select _Open_.
+
+Libation _should_ launch, and you should now be able to open Libation by just double-clicking the app bundle in your applications folder.
+
+
 ## Running Hangover
 
 Libation comes with a recovery app called Hangover. You can start it by running this command:

Documentation/NamingTemplates.md

@@ -1,3 +1,10 @@
+## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
+
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
+...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
+
+
+
 # Naming Templates
 File and Folder names can be customized using Libation's built-in tag template naming engine. To edit how folder and file names are created, go to Settings \> Download/Decrypt and edit the naming templates. If you're splitting your audiobook into multiple files by chapter, you can also use a custom template to set each chapter's title metadata tag by editing the template in Settings \> Audio File Options.
 

Documentation/SearchingAndFiltering.md

@@ -1,6 +1,6 @@
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/MBucari?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
 

Images/libation_glass.svg

@@ -1,28 +1,39 @@
-<svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 512 512" enable-background="new 0 0 512 512">
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" viewBox="0 0 524 524" enable-background="new 0 0 524 524">
-<path id="glass" d=
+	<defs>
-"M139,2
+		<g id="glass">
-	A 192,200 0 0 0 103,84
+			<path fill-rule="evenodd" d=
-	A 222,334 41 0 0 241,320
+				"M262,8
-	V478
+					h-117
-	H160
+					a 192,200 0 0 0 -36,82
-	A 16,16 0 0 0 160,510
+					a 222,334 41 0 0 138,236
-	H352
+					v158
-	A16 16 0 0 0 352,478
+					h-81
-	H271
+					a 16,16 0 0 0 0,32
-	V320
+					h192
-	A 222,334 -41 0 0 409,84
+					a 16 16 0 0 0 0,-32
-	A 192,200 0 0 0 373,2
+					h-81
-M355,32
+					v-158
-	A 192,200 0 0 1 381,127
+					a 222,334 -41 0 0 138,-236
-	A 187.5,334 -35 0 1 256,286
+					a 192,200 0 0 0 -36,-82
-	A 187.5,334 35 0 1 131,127
+					h-117
-	A 192,200 0 0 1 157,32
+				m-99,30
-	H355
+					a 192,200 0 0 0 -26,95
-z" />
+					a 187.5,334 35 0 0 125,159
-
+					a 187.5,334 -35 0 0 125,-159
-<path id="wine-level" d=
+					a 192,200 0 0 0 -26,-95
-"M146,128
+					h-198
-	A 168,300 35 0 0 256,270
+				z"/>
-	A 168,300 -35 0 0 366,128
+		</g>
-z"/>
+		<g id="wine-level">
+			<path d=
+				"M158,136
+					a 168,305 35 0 0 104,136
+					a 168,305 -35 0 0 104,-136
+				z"/>
+		</g>
+	</defs>	
+	<use href="#glass" stroke="#ffffffa0" stroke-width="16" fill="Transparent" />
+	<use href="#wine-level" stroke="#ffffffa0" stroke-width="16" fill="Transparent" />
+	<use href="#glass" fill="Black" />
+	<use href="#wine-level" fill="Black" />
 </svg>

README.md

@@ -2,9 +2,11 @@
 
 ## [Download Libation](https://github.com/rmcrackan/Libation/releases/latest)
 
-### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/MBucari?locale.x=en_us)
+### If you found this useful, tell a friend. If you found this REALLY useful, you can click here to [PayPal.me](https://paypal.me/mcrackan?locale.x=en_us)
 ...or just tell more friends. As long as I'm maintaining this software, it will remain **free** and **open source**.
 
+
+
 # Table of Contents
 
 - [Audible audiobook manager](#audible-audiobook-manager)
@@ -31,6 +33,7 @@
     - [Custom File Naming](Documentation/NamingTemplates.md)
     - [Command Line Interface](Documentation/Advanced.md#command-line-interface)
 - [Docker](Documentation/Docker.md)
+- [Frequently Asked Questions](Documentation/FrequentlyAskedQuestions.md)
 
 ## Getting started
 

Scripts/Bundle_Debian.sh

@@ -109,9 +109,6 @@ ln -s /usr/lib/libation/LibationCli /usr/bin/libationcli
 if ! grep -q 'fs.inotify.max_user_instances=524288' /etc/sysctl.conf; then
   echo fs.inotify.max_user_instances=524288 | tee -a /etc/sysctl.conf && sysctl -p
 fi
-# workaround until this file is moved to the user's home directory
-touch /usr/lib/libation/appsettings.json
-chmod 666 /usr/lib/libation/appsettings.json
 " >> $FOLDER_DEBIAN/postinst
 
 echo "Creating control file..."

Scripts/Bundle_Redhat.sh

@@ -94,8 +94,6 @@ install * %{buildroot}%{_libdir}/%{name}/
 
 if [ \$1 -eq 1 ] ; then
   # Initial installation
-  touch %{_libdir}/%{name}/appsettings.json
-  chmod 666 %{_libdir}/%{name}/appsettings.json
   
   ln -s %{_libdir}/%{name}/Libation %{_bindir}/libation
   ln -s %{_libdir}/%{name}/Hangover %{_bindir}/hangover

Source/AaxDecrypter/AaxDecrypter.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
 	<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
@@ -13,7 +13,7 @@
 	</PropertyGroup>
 
 	<ItemGroup>
-	  <PackageReference Include="AAXClean.Codecs" Version="1.1.0" />
+	  <PackageReference Include="AAXClean.Codecs" Version="1.1.3" />
 	</ItemGroup>
 
 	<ItemGroup>

Source/AaxDecrypter/AaxcDownloadConvertBase.cs

@@ -81,14 +81,7 @@ namespace AaxDecrypter
 					AaxFile.AppleTags.AppleListBox.EditOrAddFreeformTag(tagDomain, "PART", part.ToString());
 			}
 
-			//Finishing configuring lame encoder.
+			OnInitialized();
-			if (DownloadOptions.OutputFormat == OutputFormat.Mp3)
-				MpegUtil.ConfigureLameOptions(
-					AaxFile,
-					DownloadOptions.LameConfig,
-					DownloadOptions.Downsample,
-					DownloadOptions.MatchSourceBitrate);
-
 			OnRetrievedTitle(AaxFile.AppleTags.TitleSansUnabridged);
 			OnRetrievedAuthors(AaxFile.AppleTags.FirstAuthor ?? "[unknown]");
 			OnRetrievedNarrators(AaxFile.AppleTags.Narrator ?? "[unknown]");
@@ -98,5 +91,7 @@ namespace AaxDecrypter
 
 			return !IsCanceled;
 		}
+
+		protected virtual void OnInitialized() { }
 	}
 }

Source/AaxDecrypter/AaxcDownloadMultiConverter.cs

@@ -21,6 +21,18 @@ namespace AaxDecrypter
 			AsyncSteps["Step 3: Download Clips and Bookmarks"] = Step_DownloadClipsBookmarksAsync;
 		}
 
+		protected override void OnInitialized()
+		{
+			//Finishing configuring lame encoder.
+			if (DownloadOptions.OutputFormat == OutputFormat.Mp3)
+				MpegUtil.ConfigureLameOptions(
+					AaxFile,
+					DownloadOptions.LameConfig,
+					DownloadOptions.Downsample,
+					DownloadOptions.MatchSourceBitrate,
+					chapters: null);
+		}
+
 		/*
 https://github.com/rmcrackan/Libation/pull/127#issuecomment-939088489
 

Source/AaxDecrypter/AaxcDownloadSingleConverter.cs

@@ -3,7 +3,6 @@ using AAXClean.Codecs;
 using Dinah.Core.Net.Http;
 using FileManager;
 using System;
-using System.Diagnostics;
 using System.IO;
 using System.Threading.Tasks;
 
@@ -26,6 +25,18 @@ namespace AaxDecrypter
 			AsyncSteps[$"Step {step++}: Create Cue"] = Step_CreateCueAsync;
 		}
 
+		protected override void OnInitialized()
+		{
+			//Finishing configuring lame encoder.
+			if (DownloadOptions.OutputFormat == OutputFormat.Mp3)
+				MpegUtil.ConfigureLameOptions(
+					AaxFile,
+					DownloadOptions.LameConfig,
+					DownloadOptions.Downsample,
+					DownloadOptions.MatchSourceBitrate,
+					DownloadOptions.ChapterInfo);
+		}
+
 		protected async override Task<bool> Step_DownloadAndDecryptAudiobookAsync()
 		{
 			FileUtility.SaferDelete(OutputFileName);

Source/AaxDecrypter/MpegUtil.cs

@@ -8,7 +8,12 @@ namespace AaxDecrypter
 	public static class MpegUtil
 	{
 		private const string TagDomain = "com.pilabor.tone";
-		public static void ConfigureLameOptions(Mp4File mp4File, LameConfig lameConfig, bool downsample, bool matchSourceBitrate)
+		public static void ConfigureLameOptions(
+			Mp4File mp4File,
+			LameConfig lameConfig,
+			bool downsample,
+			bool matchSourceBitrate,
+			ChapterInfo chapters)
 		{
 			double bitrateMultiple = 1;
 
@@ -53,6 +58,12 @@ namespace AaxDecrypter
 
 			if (mp4File.AppleTags.AppleListBox.GetFreeformTagString(TagDomain, "PART") is string part)
 				lameConfig.ID3.UserDefinedText.Add("PART", part);
+
+			if (chapters?.Count > 0)
+			{
+				var cue = Cue.CreateContents(lameConfig.ID3.Title + ".mp3", chapters);
+				lameConfig.ID3.UserDefinedText.Add("CUESHEET", cue);
+			}
 		}
 	}
 }

Source/AppScaffolding/AppScaffolding.csproj

@@ -1,12 +1,16 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
-    <Version>10.6.0.1</Version>
+    <Version>11.3.14.1</Version>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Octokit" Version="6.0.0" />
+    <PackageReference Include="Octokit" Version="11.0.1" />
-    <PackageReference Include="Serilog.Sinks.ZipFile" Version="1.0.1" />
+    <!-- Do not remove unused Serilog.Sinks -->
+    <!-- Only ZipFile sink is currently used. By user request (June 2024) others packages are included for experimental use. -->
+    <PackageReference Include="Serilog.Sinks.Console" Version="6.0.0" />
+    <PackageReference Include="Serilog.Sinks.File" Version="6.0.0" />
+    <PackageReference Include="Serilog.Sinks.ZipFile" Version="3.1.1" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\ApplicationServices\ApplicationServices.csproj" />
@@ -19,4 +23,4 @@
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Release|AnyCPU'">
     <DebugType>embedded</DebugType>
   </PropertyGroup>
-</Project>
+</Project>

Source/AppScaffolding/LibationScaffolding.cs

@@ -124,6 +124,9 @@ namespace AppScaffolding
 				{ "MinimumLevel", "Information" },
 				{ "WriteTo", new JArray
 					{
+						// ABOUT SINKS
+						// Only ZipFile sink is currently used. By user request (June 2024) others packages are included for experimental use.
+
 						// new JObject { {"Name", "Console" } }, // this has caused more problems than it's solved
 						new JObject
 						{
@@ -233,6 +236,7 @@ namespace AppScaffolding
 				Version = BuildVersion.ToString(),
 				ReleaseIdentifier,
 				Configuration.OS,
+                Environment.OSVersion,
                 InteropFactory.InteropFunctionsType,
                 Mode = mode,
 				LogLevel_Verbose_Enabled = Log.Logger.IsVerboseEnabled(),
@@ -242,6 +246,7 @@ namespace AppScaffolding
 				LogLevel_Error_Enabled = Log.Logger.IsErrorEnabled(),
 				LogLevel_Fatal_Enabled = Log.Logger.IsFatalEnabled(),
 
+                config.AutoScan,
                 config.BetaOptIn,
                 config.UseCoverAsFolderIcon,
                 config.LibationFiles,
@@ -254,6 +259,8 @@ namespace AppScaffolding
 
 				AudibleFileStorage.DecryptInProgressDirectory,
 				DecryptInProgressFiles = FileManager.FileUtility.SaferEnumerateFiles(AudibleFileStorage.DecryptInProgressDirectory).Count(),
+
+                disableIPv6 = AppContext.TryGetSwitch("System.Net.DisableIPv6", out bool disableIPv6Value),
 			});
 
             if (InteropFactory.InteropFunctionsType is null)

Source/ApplicationServices/ApplicationServices.csproj

@@ -1,12 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="CsvHelper" Version="30.0.1" />
+    <PackageReference Include="CsvHelper" Version="32.0.3" />
-    <PackageReference Include="NPOI" Version="2.6.0" />
+    <PackageReference Include="NPOI" Version="2.7.0" />
   </ItemGroup>
 
   <ItemGroup>

Source/ApplicationServices/LibraryCommands.cs

@@ -119,9 +119,15 @@ namespace ApplicationServices
 
                 logTime($"pre {nameof(scanAccountsAsync)} all");
                 var libraryOptions = new LibraryOptions
-                {
+				{
-                    ResponseGroups = LibraryOptions.ResponseGroupOptions.ALL_OPTIONS,
+					ResponseGroups
-                    ImageSizes = LibraryOptions.ImageSizeOptions._500 | LibraryOptions.ImageSizeOptions._1215
+					    = LibraryOptions.ResponseGroupOptions.Rating | LibraryOptions.ResponseGroupOptions.Media
+					    | LibraryOptions.ResponseGroupOptions.Relationships | LibraryOptions.ResponseGroupOptions.ProductDesc
+					    | LibraryOptions.ResponseGroupOptions.Contributors | LibraryOptions.ResponseGroupOptions.ProvidedReview
+					    | LibraryOptions.ResponseGroupOptions.ProductPlans | LibraryOptions.ResponseGroupOptions.Series
+					    | LibraryOptions.ResponseGroupOptions.CategoryLadders | LibraryOptions.ResponseGroupOptions.ProductExtendedAttrs
+					    | LibraryOptions.ResponseGroupOptions.PdfUrl | LibraryOptions.ResponseGroupOptions.OriginAsin,
+					ImageSizes = LibraryOptions.ImageSizeOptions._500 | LibraryOptions.ImageSizeOptions._1215
                 };
                 var importItems = await scanAccountsAsync(apiExtendedfunc, accounts, libraryOptions);
                 logTime($"post {nameof(scanAccountsAsync)} all");

Source/ApplicationServices/LibraryExporter.cs

@@ -141,7 +141,7 @@ namespace ApplicationServices
 				PictureId = a.Book.PictureId,
 				IsAbridged = a.Book.IsAbridged,
 				DatePublished = a.Book.DatePublished,
-				CategoriesNames = a.Book.CategoriesNames().Any() ? a.Book.CategoriesNames().Aggregate((a, b) => $"{a}, {b}") : "",
+				CategoriesNames = a.Book.LowestCategoryNames().Any() ? a.Book.LowestCategoryNames().Aggregate((a, b) => $"{a}, {b}") : "",
 				MyRatingOverall = a.Book.UserDefinedItem.Rating.OverallRating,
 				MyRatingPerformance = a.Book.UserDefinedItem.Rating.PerformanceRating,
 				MyRatingStory = a.Book.UserDefinedItem.Rating.StoryRating,

Source/AudibleUtilities/ApiExtended.cs

@@ -207,7 +207,11 @@ namespace AudibleUtilities
 			try
 			{
 				var sw = Stopwatch.StartNew();
-				var items = await Api.GetCatalogProductsAsync(asins, CatalogOptions.ResponseGroupOptions.ALL_OPTIONS);
+				var items = await Api.GetCatalogProductsAsync(asins, CatalogOptions.ResponseGroupOptions.Rating | CatalogOptions.ResponseGroupOptions.Media
+					| CatalogOptions.ResponseGroupOptions.Relationships | CatalogOptions.ResponseGroupOptions.ProductDesc
+					| CatalogOptions.ResponseGroupOptions.Contributors | CatalogOptions.ResponseGroupOptions.ProvidedReview
+					| CatalogOptions.ResponseGroupOptions.ProductPlans | CatalogOptions.ResponseGroupOptions.Series
+					| CatalogOptions.ResponseGroupOptions.CategoryLadders | CatalogOptions.ResponseGroupOptions.ProductExtendedAttrs);
 				sw.Stop();
 
 				Serilog.Log.Logger.Debug($"Batch {batchNum} End: Retrieved {items.Count} items in {sw.ElapsedMilliseconds} ms");

Source/AudibleUtilities/AudibleApiValidators.cs

@@ -90,8 +90,10 @@ namespace AudibleUtilities
 			var distinct = items.GetSeriesDistinct();
 			if (distinct.Any(s => s.SeriesId is null))
 				exceptions.Add(new ArgumentException($"Collection contains {nameof(Item.Series)} with null {nameof(Series.SeriesId)}", nameof(items)));
-			if (distinct.Any(s => s.SeriesName is null))
+
-				exceptions.Add(new ArgumentException($"Collection contains {nameof(Item.Series)} with null {nameof(Series.SeriesName)}", nameof(items)));
+			//// unfortunately, a user has a series with no name
+			//if (distinct.Any(s => s.SeriesName is null))
+			//    exceptions.Add(new ArgumentException($"Collection contains {nameof(Item.Series)} with null {nameof(Series.SeriesName)}", nameof(items)));
 
 			return exceptions;
 		}

Source/AudibleUtilities/AudibleUtilities.csproj

@@ -1,11 +1,11 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="AudibleApi" Version="8.4.1.1" />
+    <PackageReference Include="AudibleApi" Version="9.1.2.1" />
   </ItemGroup>
 
   <ItemGroup>

Source/DataLayer/Configurations/BookCategoryConfig.cs

@@ -0,0 +1,26 @@
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using Microsoft.EntityFrameworkCore;
+
+namespace DataLayer.Configurations
+{
+	internal class BookCategoryConfig : IEntityTypeConfiguration<BookCategory>
+	{
+		public void Configure(EntityTypeBuilder<BookCategory> entity)
+		{
+			entity.HasKey(bc => new { bc.BookId, bc.CategoryLadderId });
+
+			entity.HasIndex(bc => bc.BookId);
+			entity.HasIndex(bc => bc.CategoryLadderId);
+
+			entity
+				.HasOne(bc => bc.Book)
+				.WithMany(b => b.CategoriesLink)
+				.HasForeignKey(bc => bc.BookId);
+
+			entity
+				.HasOne(bc => bc.CategoryLadder)
+				.WithMany(c => c.BooksLink)
+				.HasForeignKey(bc => bc.CategoryLadderId);
+		}
+	}
+}

Source/DataLayer/Configurations/BookConfig.cs

@@ -21,10 +21,7 @@ namespace DataLayer.Configurations
             entity.Ignore(nameof(Book.Narrators));
             entity.Ignore(nameof(Book.AudioFormat));
             entity.Ignore(nameof(Book.TitleWithSubtitle));
-            //// these don't seem to matter
+            entity.Ignore(b => b.Categories);
-            //entity.Ignore(nameof(Book.AuthorNames));
-            //entity.Ignore(nameof(Book.NarratorNames));
-            //entity.Ignore(nameof(Book.HasPdfs));
 
             // OwnsMany: "Can only ever appear on navigation properties of other entity types.
             //  Are automatically loaded, and can only be tracked by a DbContext alongside their owner."
@@ -58,23 +55,6 @@ namespace DataLayer.Configurations
                     // owns it 1:1, store in same table
                     b_udi.OwnsOne(udi => udi.Rating);
                 });
-
-            entity
-                .Metadata
-                .FindNavigation(nameof(Book.ContributorsLink))
-                // PropertyAccessMode.Field : Contributions is a get-only property, not a field, so use its backing field
-                .SetPropertyAccessMode(PropertyAccessMode.Field);
-
-            entity
-                .Metadata
-                .FindNavigation(nameof(Book.SeriesLink))
-                // PropertyAccessMode.Field : Series is a get-only property, not a field, so use its backing field
-                .SetPropertyAccessMode(PropertyAccessMode.Field);
-
-            entity
-                .HasOne(b => b.Category)
-                .WithMany()
-                .HasForeignKey(b => b.CategoryId);
         }
     }
 }

Source/DataLayer/Configurations/CategoryConfig.cs

@@ -10,8 +10,11 @@ namespace DataLayer.Configurations
             entity.HasKey(c => c.CategoryId);
             entity.HasIndex(c => c.AudibleCategoryId);
 
-            // seeds go here. examples in Dinah.EntityFrameworkCore.Tests\DbContextFactoryExample.cs
+            entity.Ignore(c => c.CategoryLadders);
-            entity.HasData(Category.GetEmpty());
+
+            entity
+                .HasMany(e => e._categoryLadders)
+                .WithMany(e => e._categories);
         }
     }
 }

Source/DataLayer/Configurations/CategoryLadderConfig.cs

@@ -0,0 +1,24 @@
+using Microsoft.EntityFrameworkCore.Metadata.Builders;
+using Microsoft.EntityFrameworkCore;
+
+namespace DataLayer.Configurations
+{
+	internal class CategoryLadderConfig : IEntityTypeConfiguration<CategoryLadder>
+	{
+		public void Configure(EntityTypeBuilder<CategoryLadder> entity)
+		{
+			entity.HasKey(cl => cl.CategoryLadderId);
+
+			entity.Ignore(cl => cl.Categories);
+
+			entity
+				.HasMany(cl => cl._categories)
+				.WithMany(c => c._categoryLadders);
+
+			entity
+				.Metadata
+				.FindNavigation(nameof(CategoryLadder.BooksLink))
+				.SetPropertyAccessMode(PropertyAccessMode.Field);
+		}
+	}
+}

Source/DataLayer/DataLayer.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
   <PropertyGroup>
@@ -10,14 +10,14 @@
   </PropertyGroup>
   
   <ItemGroup>
-    <PackageReference Include="Dinah.Core" Version="7.2.2.1" />
+    <PackageReference Include="Dinah.Core" Version="8.0.0.1" />
-    <PackageReference Include="Dinah.EntityFrameworkCore" Version="7.1.1.1" />
+    <PackageReference Include="Dinah.EntityFrameworkCore" Version="8.0.0.1" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="7.0.5">
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Design" Version="8.0.5">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="7.0.5" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="8.0.5" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="7.0.5">
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="8.0.5">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
     </PackageReference>

Source/DataLayer/EfClasses/Book.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Linq;
 using Dinah.Core;
 using Microsoft.EntityFrameworkCore;
@@ -37,7 +38,7 @@ namespace DataLayer
         public string Subtitle { get; private set; }
         private string _titleWithSubtitle;
         public string TitleWithSubtitle => _titleWithSubtitle ??= string.IsNullOrEmpty(Subtitle) ? Title : $"{Title}: {Subtitle}";
-		public string Description { get; private set; }
+        public string Description { get; private set; }
         public int LengthInMinutes { get; private set; }
         public ContentType ContentType { get; private set; }
         public string Locale { get; private set; }
@@ -55,10 +56,6 @@ namespace DataLayer
         public DateTime? DatePublished { get; private set; }
         public string Language { get; private set; }
 
-        // non-null. use "empty pattern"
-        internal int CategoryId { get; private set; }
-        public Category Category { get; private set; }
-
         // is owned, not optional 1:1
         public UserDefinedItem UserDefinedItem { get; private set; }
 
@@ -77,9 +74,8 @@ namespace DataLayer
             string description,
             int lengthInMinutes,
             ContentType contentType,
-			IEnumerable<Contributor> authors,
+            IEnumerable<Contributor> authors,
-			IEnumerable<Contributor> narrators,
+            IEnumerable<Contributor> narrators,
-			Category category,
             string localeName)
         {
             // validate
@@ -87,7 +83,7 @@ namespace DataLayer
             var productId = audibleProductId.Id;
             ArgumentValidator.EnsureNotNullOrWhiteSpace(productId, nameof(productId));
 
-			// assign as soon as possible. stuff below relies on this
+            // assign as soon as possible. stuff below relies on this
             AudibleProductId = productId;
             Locale = localeName;
 
@@ -95,43 +91,38 @@ namespace DataLayer
 
             // non-ef-ctor init.s
             UserDefinedItem = new UserDefinedItem(this);
-            _contributorsLink = new HashSet<BookContributor>();
+            ContributorsLink = new HashSet<BookContributor>();
+            CategoriesLink = new HashSet<BookCategory>();
             _seriesLink = new HashSet<SeriesBook>();
             _supplements = new HashSet<Supplement>();
 
-			Category = category;
-
             // simple assigns
             UpdateTitle(title, subtitle);
-			Description = description?.Trim() ?? "";
+            Description = description?.Trim() ?? "";
             LengthInMinutes = lengthInMinutes;
             ContentType = contentType;
 
             // assigns with biz logic
             ReplaceAuthors(authors);
             ReplaceNarrators(narrators);
-		}
+        }
-        public void UpdateTitle(string  title, string subtitle)
+
+        public void UpdateTitle(string title, string subtitle)
         {
             Title = title?.Trim() ?? "";
             Subtitle = subtitle?.Trim() ?? "";
             _titleWithSubtitle = null;
-		}
+        }
+
+        public void UpdateLengthInMinutes(int lengthInMinutes)
+            => LengthInMinutes = lengthInMinutes;
 
 		#region contributors, authors, narrators
-		// use uninitialised backing fields - this means we can detect if the collection was loaded
+		internal HashSet<BookContributor> ContributorsLink { get; private set; }
-		private HashSet<BookContributor> _contributorsLink;
-        // i'd like this to be internal but migration throws this exception when i try:
-        //   Value cannot be null.
-        //   Parameter name: property
-        public IEnumerable<BookContributor> ContributorsLink
-            => _contributorsLink?
-                .OrderBy(bc => bc.Order)
-                .ToList();
 
-        public IEnumerable<Contributor> Authors => getContributions(Role.Author).Select(bc => bc.Contributor).ToList();
+        public IEnumerable<Contributor> Authors => ContributorsLink.ByRole(Role.Author).Select(bc => bc.Contributor).ToList();
-        public IEnumerable<Contributor> Narrators => getContributions(Role.Narrator).Select(bc => bc.Contributor).ToList();
+        public IEnumerable<Contributor> Narrators => ContributorsLink.ByRole(Role.Narrator).Select(bc => bc.Contributor).ToList();
-        public string Publisher => getContributions(Role.Publisher).SingleOrDefault()?.Contributor.Name;
+        public string Publisher => ContributorsLink.ByRole(Role.Publisher).SingleOrDefault()?.Contributor.Name;
 
         public void ReplaceAuthors(IEnumerable<Contributor> authors, DbContext context = null)
             => replaceContributors(authors, Role.Author, context);
@@ -144,47 +135,70 @@ namespace DataLayer
             ArgumentValidator.EnsureEnumerableNotNullOrEmpty(newContributors, nameof(newContributors));
 
             // the edge cases of doing local-loaded vs remote-only got weird. just load it
-            if (_contributorsLink is null)
+            if (ContributorsLink is null)
-				getEntry(context).Collection(s => s.ContributorsLink).Load();
+                getEntry(context).Collection(s => s.ContributorsLink).Load();
+
+            var isIdentical
+                = ContributorsLink
+                .ByRole(role)
+                .Select(c => c.Contributor)
+                .SequenceEqual(newContributors);
 
-			var roleContributions = getContributions(role);
-            var isIdentical = roleContributions.Select(c => c.Contributor).SequenceEqual(newContributors);
             if (isIdentical)
                 return;
 
-            _contributorsLink.RemoveWhere(bc => bc.Role == role);
+            ContributorsLink.RemoveWhere(bc => bc.Role == role);
             addNewContributors(newContributors, role);
         }
 
-		private void addNewContributors(IEnumerable<Contributor> newContributors, Role role)
+        private void addNewContributors(IEnumerable<Contributor> newContributors, Role role)
         {
             byte order = 0;
             var newContributionsEnum = newContributors.Select(c => new BookContributor(this, c, role, order++));
             var newContributions = new HashSet<BookContributor>(newContributionsEnum);
-            _contributorsLink.UnionWith(newContributions);
+            ContributorsLink.UnionWith(newContributions);
         }
 
-        private List<BookContributor> getContributions(Role role)
-            => ContributorsLink
-                .Where(a => a.Role == role)
-                .OrderBy(a => a.Order)
-                .ToList();
         #endregion
 
-		private Microsoft.EntityFrameworkCore.ChangeTracking.EntityEntry<Book> getEntry(DbContext context)
+        private Microsoft.EntityFrameworkCore.ChangeTracking.EntityEntry<Book> getEntry(DbContext context)
+        {
+            ArgumentValidator.EnsureNotNull(context, nameof(context));
+
+            var entry = context.Entry(this);
+
+            if (!entry.IsKeySet)
+                throw new InvalidOperationException("Could not load a valid Book from database");
+
+            return entry;
+        }
+
+        #region categories
+        internal HashSet<BookCategory> CategoriesLink { get; private set; }
+
+        private ReadOnlyCollection<BookCategory> _categoriesReadOnly;
+        public ReadOnlyCollection<BookCategory> Categories
+        {
+            get
+            {
+                if (_categoriesReadOnly?.SequenceEqual(CategoriesLink) is not true)
+                    _categoriesReadOnly = CategoriesLink.ToList().AsReadOnly();
+                return _categoriesReadOnly;
+            }
+        }
+		public void SetCategoryLadders(IEnumerable<CategoryLadder> ladders)
 		{
-			ArgumentValidator.EnsureNotNull(context, nameof(context));
+			ArgumentValidator.EnsureNotNull(ladders, nameof(ladders));
 
-			var entry = context.Entry(this);
+			//Replace all existing category ladders.
-
+            //Some books make have duplocate ladders
-			if (!entry.IsKeySet)
+			CategoriesLink.Clear();
-				throw new InvalidOperationException("Could not load a valid Book from database");
+            CategoriesLink.UnionWith(ladders.Distinct().Select(l => new BookCategory(this, l)));
-
-			return entry;
 		}
+		#endregion
 
-        #region series
+		#region series
-        private HashSet<SeriesBook> _seriesLink;
+		private HashSet<SeriesBook> _seriesLink;
         public IEnumerable<SeriesBook> SeriesLink => _seriesLink?.ToList();
 
         public void UpsertSeries(Series series, string order, DbContext context = null)
@@ -234,15 +248,6 @@ namespace DataLayer
             Language = language?.FirstCharToUpper() ?? Language;
         }
 
-        public void UpdateCategory(Category category, DbContext context = null)
-		{
-			// since category is never null, nullity means it hasn't been loaded
-			if (Category is null)
-				getEntry(context).Reference(s => s.Category).Load();
-
-			Category = category;
-        }
-
         public override string ToString() => $"[{AudibleProductId}] {TitleWithSubtitle}";
 	}
 }

Source/DataLayer/EfClasses/BookCategory.cs

@@ -0,0 +1,20 @@
+using Dinah.Core;
+
+namespace DataLayer
+{
+	public class BookCategory
+	{
+		internal int BookId { get; private set; }
+		internal int CategoryLadderId { get; private set; }
+
+		public Book Book { get; private set; }
+		public CategoryLadder CategoryLadder { get; private set; }
+		private BookCategory() { }
+
+		internal BookCategory(Book book, CategoryLadder categoriesList)
+		{
+			Book = ArgumentValidator.EnsureNotNull(book, nameof(book));
+			CategoryLadder = ArgumentValidator.EnsureNotNull(categoriesList, nameof(categoriesList));
+		}
+	}
+}

Source/DataLayer/EfClasses/Category.cs

@@ -1,9 +1,9 @@
-using System;
+using System.Collections.Generic;
-using System.Collections.Generic;
+using System.Collections.ObjectModel;
 using System.Linq;
 using Dinah.Core;
-using Microsoft.EntityFrameworkCore;
 
+#nullable enable
 namespace DataLayer
 {
     public class AudibleCategoryId
@@ -15,20 +15,29 @@ namespace DataLayer
             Id = id;
         }
     }
+
     public class Category
     {
-        // Empty is a special case. use private ctor w/o validation
-        public static Category GetEmpty() => new() { CategoryId = -1, AudibleCategoryId = "", Name = "" };
-
         internal int CategoryId { get; private set; }
-        public string AudibleCategoryId { get; private set; }
+        public string? AudibleCategoryId { get; private set; }
 
-        public string Name { get; private set; }
+        public string? Name { get; internal set; }
-        public Category ParentCategory { get; private set; }
 
-        private Category() { }
+        internal List<CategoryLadder> _categoryLadders = new();
+        private ReadOnlyCollection<CategoryLadder>? _categoryLaddersReadOnly;
+        public ReadOnlyCollection<CategoryLadder> CategoryLadders
+		{
+			get
+			{
+				if (_categoryLaddersReadOnly?.SequenceEqual(_categoryLadders) is not true)
+					_categoryLaddersReadOnly = _categoryLadders.AsReadOnly();
+				return _categoryLaddersReadOnly;
+			}
+		}
+
+		private Category() { }
         /// <summary>special id class b/c it's too easy to get string order mixed up</summary>
-        public Category(AudibleCategoryId audibleSeriesId, string name, Category parentCategory = null)
+        public Category(AudibleCategoryId audibleSeriesId, string name)
         {
             ArgumentValidator.EnsureNotNull(audibleSeriesId, nameof(audibleSeriesId));
             var id = audibleSeriesId.Id;
@@ -37,15 +46,6 @@ namespace DataLayer
 
             AudibleCategoryId = id;
             Name = name;
-
-            UpdateParentCategory(parentCategory);
-        }
-
-        public void UpdateParentCategory(Category parentCategory)
-        {
-            // don't overwrite with null but not an error
-            if (parentCategory is not null)
-                ParentCategory = parentCategory;
         }
 
 		public override string ToString() => $"[{AudibleCategoryId}] {Name}";

Source/DataLayer/EfClasses/CategoryLadder.cs

@@ -0,0 +1,58 @@
+using Dinah.Core;
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Linq;
+
+#nullable enable
+namespace DataLayer
+{
+	public class CategoryLadder : IEquatable<CategoryLadder>
+	{
+		internal int CategoryLadderId { get; private set; }
+
+		internal List<Category> _categories;
+		private ReadOnlyCollection<Category>? _categoriesReadOnly;
+		public ReadOnlyCollection<Category> Categories
+		{
+			get
+			{
+				if (_categoriesReadOnly?.SequenceEqual(_categories) is not true)
+					_categoriesReadOnly = _categories.AsReadOnly();
+				return _categoriesReadOnly;
+			}
+		}
+
+		private HashSet<BookCategory>? _booksLink;
+		public IEnumerable<BookCategory>? BooksLink => _booksLink?.ToList();
+		private CategoryLadder() { _categories = new(); }
+		public CategoryLadder(List<Category> categories)
+		{
+			ArgumentValidator.EnsureNotNull(categories, nameof(categories));
+			ArgumentValidator.EnsureGreaterThan(categories.Count, nameof(categories), 0);
+			_booksLink = new HashSet<BookCategory>();
+			_categories = categories;
+		}
+
+		public override int GetHashCode()
+		{
+			HashCode hashCode = default;
+			foreach (var category in _categories)
+				hashCode.Add(category.AudibleCategoryId);
+			return hashCode.ToHashCode();
+		}
+
+		public bool Equals(CategoryLadder? other)
+			=> other?._categories is not null
+			&& Equals(other._categories.Select(c => c.AudibleCategoryId));
+
+		public bool Equals(IEnumerable<string?>? categoryIds)
+			=> categoryIds is not null
+			&& _categories.Select(c => c.AudibleCategoryId).SequenceEqual(categoryIds);
+
+		public override bool Equals(object? obj)
+			=> obj is CategoryLadder other && Equals(other);
+
+		public override string ToString() => string.Join(" > ", _categories.Select(c => c.Name));
+	}
+}

Source/DataLayer/EntityExtensions.cs

@@ -7,8 +7,13 @@ using System.Threading.Tasks;
 namespace DataLayer
 {
     public static class EntityExtensions
-    {
+	{
-        public static string TitleSortable(this Book book) => Formatters.GetSortName(book.Title + book.Subtitle);
+		public static IEnumerable<BookContributor> ByRole(this IEnumerable<BookContributor> contributors, Role role)
+			=> contributors
+				.Where(a => a.Role == role)
+				.OrderBy(a => a.Order);
+
+		public static string TitleSortable(this Book book) => Formatters.GetSortName(book.Title + book.Subtitle);
 
         public static string AuthorNames(this Book book) => string.Join(", ", book.Authors.Select(a => a.Name));
         public static string NarratorNames(this Book book) => string.Join(", ", book.Narrators.Select(n => n.Name));
@@ -46,14 +51,31 @@ namespace DataLayer
                 ? $"{sb.Series.Name} (#{sb.Order})"
                 : sb.Series.Name;
 		}
-        public static string[] CategoriesNames(this Book book)
+
-            => book.Category is null ? new string[0]
+        public static string[] LowestCategoryNames(this Book book)
-            : book.Category.ParentCategory is null ? new[] { book.Category.Name }
+            => book.CategoriesLink?.Any() is not true ? Array.Empty<string>()
-            : new[] { book.Category.ParentCategory.Name, book.Category.Name };
+			: book
-        public static string[] CategoriesIds(this Book book)
+                .CategoriesLink
-            => book.Category is null ? null
+                .Select(cl => cl.CategoryLadder.Categories.LastOrDefault()?.Name)
-            : book.Category.ParentCategory is null ? new[] { book.Category.AudibleCategoryId }
+                .Where(c => c is not null)
-            : new[] { book.Category.ParentCategory.AudibleCategoryId, book.Category.AudibleCategoryId };
+                .Distinct()
+                .ToArray();
+
+        public static string[] AllCategoryNames(this Book book)
+            => book.CategoriesLink?.Any() is not true ? Array.Empty<string>()
+            : book
+                .CategoriesLink
+                .SelectMany(cl => cl.CategoryLadder.Categories)
+                .Select(c => c.Name)
+                .ToArray();
+
+		public static string[] AllCategoryIds(this Book book)
+            => book.CategoriesLink?.Any() is not true ? null
+            : book
+                .CategoriesLink
+                .SelectMany(cl => cl.CategoryLadder.Categories)
+                .Select(c => c.AudibleCategoryId)
+                .ToArray();
 
         public static string AggregateTitles(this IEnumerable<LibraryBook> libraryBooks, int max = 5)
 		{

Source/DataLayer/LibationContext.cs

@@ -23,6 +23,7 @@ namespace DataLayer
         public DbSet<Contributor> Contributors { get; private set; }
         public DbSet<Series> Series { get; private set; }
         public DbSet<Category> Categories { get; private set; }
+        public DbSet<CategoryLadder> CategoryLadders { get; private set; }
 
         public static LibationContext Create(string connectionString)
         {
@@ -39,13 +40,15 @@ namespace DataLayer
         {
             base.OnModelCreating(modelBuilder);
 
-            modelBuilder.ApplyConfiguration(new BookConfig());
+			modelBuilder.ApplyConfiguration(new BookConfig());
             modelBuilder.ApplyConfiguration(new ContributorConfig());
             modelBuilder.ApplyConfiguration(new BookContributorConfig());
             modelBuilder.ApplyConfiguration(new LibraryBookConfig());
             modelBuilder.ApplyConfiguration(new SeriesConfig());
             modelBuilder.ApplyConfiguration(new SeriesBookConfig());
             modelBuilder.ApplyConfiguration(new CategoryConfig());
+			modelBuilder.ApplyConfiguration(new CategoryLadderConfig());
+			modelBuilder.ApplyConfiguration(new BookCategoryConfig());
 
 			// views are now supported via "keyless entity types" (instead of "entity types" or the prev "query types"):
 			// https://docs.microsoft.com/en-us/ef/core/modeling/keyless-entity-types

Source/DataLayer/Migrations/20230718214617_AddCategoryLadder.Designer.cs

@@ -0,0 +1,465 @@
+// <auto-generated />
+using System;
+using DataLayer;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace DataLayer.Migrations
+{
+    [DbContext(typeof(LibationContext))]
+    [Migration("20230718214617_AddCategoryLadder")]
+    partial class AddCategoryLadder
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "7.0.5");
+
+            modelBuilder.Entity("CategoryCategoryLadder", b =>
+                {
+                    b.Property<int>("_categoriesCategoryId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("_categoryLaddersCategoryLadderId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("_categoriesCategoryId", "_categoryLaddersCategoryLadderId");
+
+                    b.HasIndex("_categoryLaddersCategoryLadderId");
+
+                    b.ToTable("CategoryCategoryLadder");
+                });
+
+            modelBuilder.Entity("DataLayer.Book", b =>
+                {
+                    b.Property<int>("BookId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AudibleProductId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("ContentType")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<DateTime?>("DatePublished")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Description")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("IsAbridged")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Language")
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("LengthInMinutes")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Locale")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PictureId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("PictureLarge")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Subtitle")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Title")
+                        .HasColumnType("TEXT");
+
+                    b.Property<long>("_audioFormat")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("BookId");
+
+                    b.HasIndex("AudibleProductId");
+
+                    b.ToTable("Books");
+                });
+
+            modelBuilder.Entity("DataLayer.BookCategory", b =>
+                {
+                    b.Property<int>("BookId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("CategoryLadderId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("BookId", "CategoryLadderId");
+
+                    b.HasIndex("BookId");
+
+                    b.HasIndex("CategoryLadderId");
+
+                    b.ToTable("BookCategory");
+                });
+
+            modelBuilder.Entity("DataLayer.BookContributor", b =>
+                {
+                    b.Property<int>("BookId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("ContributorId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("Role")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<byte>("Order")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("BookId", "ContributorId", "Role");
+
+                    b.HasIndex("BookId");
+
+                    b.HasIndex("ContributorId");
+
+                    b.ToTable("BookContributor");
+                });
+
+            modelBuilder.Entity("DataLayer.Category", b =>
+                {
+                    b.Property<int>("CategoryId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AudibleCategoryId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("CategoryId");
+
+                    b.HasIndex("AudibleCategoryId");
+
+                    b.ToTable("Categories");
+                });
+
+            modelBuilder.Entity("DataLayer.CategoryLadder", b =>
+                {
+                    b.Property<int>("CategoryLadderId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("CategoryLadderId");
+
+                    b.ToTable("CategoryLadders");
+                });
+
+            modelBuilder.Entity("DataLayer.Contributor", b =>
+                {
+                    b.Property<int>("ContributorId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AudibleContributorId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("ContributorId");
+
+                    b.HasIndex("Name");
+
+                    b.ToTable("Contributors");
+
+                    b.HasData(
+                        new
+                        {
+                            ContributorId = -1,
+                            Name = ""
+                        });
+                });
+
+            modelBuilder.Entity("DataLayer.LibraryBook", b =>
+                {
+                    b.Property<int>("BookId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<bool>("AbsentFromLastScan")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Account")
+                        .HasColumnType("TEXT");
+
+                    b.Property<DateTime>("DateAdded")
+                        .HasColumnType("TEXT");
+
+                    b.Property<bool>("IsDeleted")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("BookId");
+
+                    b.ToTable("LibraryBooks");
+                });
+
+            modelBuilder.Entity("DataLayer.Series", b =>
+                {
+                    b.Property<int>("SeriesId")
+                        .ValueGeneratedOnAdd()
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("AudibleSeriesId")
+                        .HasColumnType("TEXT");
+
+                    b.Property<string>("Name")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("SeriesId");
+
+                    b.HasIndex("AudibleSeriesId");
+
+                    b.ToTable("Series");
+                });
+
+            modelBuilder.Entity("DataLayer.SeriesBook", b =>
+                {
+                    b.Property<int>("SeriesId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("BookId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Order")
+                        .HasColumnType("TEXT");
+
+                    b.HasKey("SeriesId", "BookId");
+
+                    b.HasIndex("BookId");
+
+                    b.HasIndex("SeriesId");
+
+                    b.ToTable("SeriesBook");
+                });
+
+            modelBuilder.Entity("CategoryCategoryLadder", b =>
+                {
+                    b.HasOne("DataLayer.Category", null)
+                        .WithMany()
+                        .HasForeignKey("_categoriesCategoryId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DataLayer.CategoryLadder", null)
+                        .WithMany()
+                        .HasForeignKey("_categoryLaddersCategoryLadderId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("DataLayer.Book", b =>
+                {
+                    b.OwnsOne("DataLayer.Rating", "Rating", b1 =>
+                        {
+                            b1.Property<int>("BookId")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<float>("OverallRating")
+                                .HasColumnType("REAL");
+
+                            b1.Property<float>("PerformanceRating")
+                                .HasColumnType("REAL");
+
+                            b1.Property<float>("StoryRating")
+                                .HasColumnType("REAL");
+
+                            b1.HasKey("BookId");
+
+                            b1.ToTable("Books");
+
+                            b1.WithOwner()
+                                .HasForeignKey("BookId");
+                        });
+
+                    b.OwnsMany("DataLayer.Supplement", "Supplements", b1 =>
+                        {
+                            b1.Property<int>("SupplementId")
+                                .ValueGeneratedOnAdd()
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<int>("BookId")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<string>("Url")
+                                .HasColumnType("TEXT");
+
+                            b1.HasKey("SupplementId");
+
+                            b1.HasIndex("BookId");
+
+                            b1.ToTable("Supplement");
+
+                            b1.WithOwner("Book")
+                                .HasForeignKey("BookId");
+
+                            b1.Navigation("Book");
+                        });
+
+                    b.OwnsOne("DataLayer.UserDefinedItem", "UserDefinedItem", b1 =>
+                        {
+                            b1.Property<int>("BookId")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<int>("BookStatus")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<DateTime?>("LastDownloaded")
+                                .HasColumnType("TEXT");
+
+                            b1.Property<string>("LastDownloadedVersion")
+                                .HasColumnType("TEXT");
+
+                            b1.Property<int?>("PdfStatus")
+                                .HasColumnType("INTEGER");
+
+                            b1.Property<string>("Tags")
+                                .HasColumnType("TEXT");
+
+                            b1.HasKey("BookId");
+
+                            b1.ToTable("UserDefinedItem", (string)null);
+
+                            b1.WithOwner("Book")
+                                .HasForeignKey("BookId");
+
+                            b1.OwnsOne("DataLayer.Rating", "Rating", b2 =>
+                                {
+                                    b2.Property<int>("UserDefinedItemBookId")
+                                        .HasColumnType("INTEGER");
+
+                                    b2.Property<float>("OverallRating")
+                                        .HasColumnType("REAL");
+
+                                    b2.Property<float>("PerformanceRating")
+                                        .HasColumnType("REAL");
+
+                                    b2.Property<float>("StoryRating")
+                                        .HasColumnType("REAL");
+
+                                    b2.HasKey("UserDefinedItemBookId");
+
+                                    b2.ToTable("UserDefinedItem");
+
+                                    b2.WithOwner()
+                                        .HasForeignKey("UserDefinedItemBookId");
+                                });
+
+                            b1.Navigation("Book");
+
+                            b1.Navigation("Rating");
+                        });
+
+                    b.Navigation("Rating");
+
+                    b.Navigation("Supplements");
+
+                    b.Navigation("UserDefinedItem");
+                });
+
+            modelBuilder.Entity("DataLayer.BookCategory", b =>
+                {
+                    b.HasOne("DataLayer.Book", "Book")
+                        .WithMany("CategoriesLink")
+                        .HasForeignKey("BookId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DataLayer.CategoryLadder", "CategoryLadder")
+                        .WithMany("BooksLink")
+                        .HasForeignKey("CategoryLadderId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Book");
+
+                    b.Navigation("CategoryLadder");
+                });
+
+            modelBuilder.Entity("DataLayer.BookContributor", b =>
+                {
+                    b.HasOne("DataLayer.Book", "Book")
+                        .WithMany("ContributorsLink")
+                        .HasForeignKey("BookId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DataLayer.Contributor", "Contributor")
+                        .WithMany("BooksLink")
+                        .HasForeignKey("ContributorId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Book");
+
+                    b.Navigation("Contributor");
+                });
+
+            modelBuilder.Entity("DataLayer.LibraryBook", b =>
+                {
+                    b.HasOne("DataLayer.Book", "Book")
+                        .WithOne()
+                        .HasForeignKey("DataLayer.LibraryBook", "BookId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Book");
+                });
+
+            modelBuilder.Entity("DataLayer.SeriesBook", b =>
+                {
+                    b.HasOne("DataLayer.Book", "Book")
+                        .WithMany("SeriesLink")
+                        .HasForeignKey("BookId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DataLayer.Series", "Series")
+                        .WithMany("BooksLink")
+                        .HasForeignKey("SeriesId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Book");
+
+                    b.Navigation("Series");
+                });
+
+            modelBuilder.Entity("DataLayer.Book", b =>
+                {
+                    b.Navigation("CategoriesLink");
+
+                    b.Navigation("ContributorsLink");
+
+                    b.Navigation("SeriesLink");
+                });
+
+            modelBuilder.Entity("DataLayer.CategoryLadder", b =>
+                {
+                    b.Navigation("BooksLink");
+                });
+
+            modelBuilder.Entity("DataLayer.Contributor", b =>
+                {
+                    b.Navigation("BooksLink");
+                });
+
+            modelBuilder.Entity("DataLayer.Series", b =>
+                {
+                    b.Navigation("BooksLink");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

Source/DataLayer/Migrations/20230718214617_AddCategoryLadder.cs

@@ -0,0 +1,174 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace DataLayer.Migrations
+{
+    /// <inheritdoc />
+    public partial class AddCategoryLadder : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropForeignKey(
+                name: "FK_Books_Categories_CategoryId",
+                table: "Books");
+
+            migrationBuilder.DropForeignKey(
+                name: "FK_Categories_Categories_ParentCategoryCategoryId",
+                table: "Categories");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Categories_ParentCategoryCategoryId",
+                table: "Categories");
+
+            migrationBuilder.DropIndex(
+                name: "IX_Books_CategoryId",
+                table: "Books");
+
+            migrationBuilder.DeleteData(
+                table: "Categories",
+                keyColumn: "CategoryId",
+                keyValue: -1);
+
+            migrationBuilder.DropColumn(
+                name: "ParentCategoryCategoryId",
+                table: "Categories");
+
+            migrationBuilder.DropColumn(
+                name: "CategoryId",
+                table: "Books");
+
+            migrationBuilder.CreateTable(
+                name: "CategoryLadders",
+                columns: table => new
+                {
+                    CategoryLadderId = table.Column<int>(type: "INTEGER", nullable: false)
+                        .Annotation("Sqlite:Autoincrement", true)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_CategoryLadders", x => x.CategoryLadderId);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "BookCategory",
+                columns: table => new
+                {
+                    BookId = table.Column<int>(type: "INTEGER", nullable: false),
+                    CategoryLadderId = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_BookCategory", x => new { x.BookId, x.CategoryLadderId });
+                    table.ForeignKey(
+                        name: "FK_BookCategory_Books_BookId",
+                        column: x => x.BookId,
+                        principalTable: "Books",
+                        principalColumn: "BookId",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_BookCategory_CategoryLadders_CategoryLadderId",
+                        column: x => x.CategoryLadderId,
+                        principalTable: "CategoryLadders",
+                        principalColumn: "CategoryLadderId",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateTable(
+                name: "CategoryCategoryLadder",
+                columns: table => new
+                {
+                    _categoriesCategoryId = table.Column<int>(type: "INTEGER", nullable: false),
+                    _categoryLaddersCategoryLadderId = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_CategoryCategoryLadder", x => new { x._categoriesCategoryId, x._categoryLaddersCategoryLadderId });
+                    table.ForeignKey(
+                        name: "FK_CategoryCategoryLadder_Categories__categoriesCategoryId",
+                        column: x => x._categoriesCategoryId,
+                        principalTable: "Categories",
+                        principalColumn: "CategoryId",
+                        onDelete: ReferentialAction.Cascade);
+                    table.ForeignKey(
+                        name: "FK_CategoryCategoryLadder_CategoryLadders__categoryLaddersCategoryLadderId",
+                        column: x => x._categoryLaddersCategoryLadderId,
+                        principalTable: "CategoryLadders",
+                        principalColumn: "CategoryLadderId",
+                        onDelete: ReferentialAction.Cascade);
+                });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_BookCategory_BookId",
+                table: "BookCategory",
+                column: "BookId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_BookCategory_CategoryLadderId",
+                table: "BookCategory",
+                column: "CategoryLadderId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_CategoryCategoryLadder__categoryLaddersCategoryLadderId",
+                table: "CategoryCategoryLadder",
+                column: "_categoryLaddersCategoryLadderId");
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "BookCategory");
+
+            migrationBuilder.DropTable(
+                name: "CategoryCategoryLadder");
+
+            migrationBuilder.DropTable(
+                name: "CategoryLadders");
+
+            migrationBuilder.AddColumn<int>(
+                name: "ParentCategoryCategoryId",
+                table: "Categories",
+                type: "INTEGER",
+                nullable: true);
+
+            migrationBuilder.AddColumn<int>(
+                name: "CategoryId",
+                table: "Books",
+                type: "INTEGER",
+                nullable: false,
+                defaultValue: 0);
+
+            migrationBuilder.InsertData(
+                table: "Categories",
+                columns: new[] { "CategoryId", "AudibleCategoryId", "Name", "ParentCategoryCategoryId" },
+                values: new object[] { -1, "", "", null });
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Categories_ParentCategoryCategoryId",
+                table: "Categories",
+                column: "ParentCategoryCategoryId");
+
+            migrationBuilder.CreateIndex(
+                name: "IX_Books_CategoryId",
+                table: "Books",
+                column: "CategoryId");
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Books_Categories_CategoryId",
+                table: "Books",
+                column: "CategoryId",
+                principalTable: "Categories",
+                principalColumn: "CategoryId",
+                onDelete: ReferentialAction.Cascade);
+
+            migrationBuilder.AddForeignKey(
+                name: "FK_Categories_Categories_ParentCategoryCategoryId",
+                table: "Categories",
+                column: "ParentCategoryCategoryId",
+                principalTable: "Categories",
+                principalColumn: "CategoryId");
+        }
+    }
+}

Source/DataLayer/Migrations/LibationContextModelSnapshot.cs

@@ -17,6 +17,21 @@ namespace DataLayer.Migrations
 #pragma warning disable 612, 618
             modelBuilder.HasAnnotation("ProductVersion", "7.0.5");
 
+            modelBuilder.Entity("CategoryCategoryLadder", b =>
+                {
+                    b.Property<int>("_categoriesCategoryId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("_categoryLaddersCategoryLadderId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("_categoriesCategoryId", "_categoryLaddersCategoryLadderId");
+
+                    b.HasIndex("_categoryLaddersCategoryLadderId");
+
+                    b.ToTable("CategoryCategoryLadder");
+                });
+
             modelBuilder.Entity("DataLayer.Book", b =>
                 {
                     b.Property<int>("BookId")
@@ -26,9 +41,6 @@ namespace DataLayer.Migrations
                     b.Property<string>("AudibleProductId")
                         .HasColumnType("TEXT");
 
-                    b.Property<int>("CategoryId")
-                        .HasColumnType("INTEGER");
-
                     b.Property<int>("ContentType")
                         .HasColumnType("INTEGER");
 
@@ -69,11 +81,26 @@ namespace DataLayer.Migrations
 
                     b.HasIndex("AudibleProductId");
 
-                    b.HasIndex("CategoryId");
-
                     b.ToTable("Books");
                 });
 
+            modelBuilder.Entity("DataLayer.BookCategory", b =>
+                {
+                    b.Property<int>("BookId")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<int>("CategoryLadderId")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("BookId", "CategoryLadderId");
+
+                    b.HasIndex("BookId");
+
+                    b.HasIndex("CategoryLadderId");
+
+                    b.ToTable("BookCategory");
+                });
+
             modelBuilder.Entity("DataLayer.BookContributor", b =>
                 {
                     b.Property<int>("BookId")
@@ -109,24 +136,22 @@ namespace DataLayer.Migrations
                     b.Property<string>("Name")
                         .HasColumnType("TEXT");
 
-                    b.Property<int?>("ParentCategoryCategoryId")
-                        .HasColumnType("INTEGER");
-
                     b.HasKey("CategoryId");
 
                     b.HasIndex("AudibleCategoryId");
 
-                    b.HasIndex("ParentCategoryCategoryId");
-
                     b.ToTable("Categories");
+                });
 
-                    b.HasData(
+            modelBuilder.Entity("DataLayer.CategoryLadder", b =>
-                        new
+                {
-                        {
+                    b.Property<int>("CategoryLadderId")
-                            CategoryId = -1,
+                        .ValueGeneratedOnAdd()
-                            AudibleCategoryId = "",
+                        .HasColumnType("INTEGER");
-                            Name = ""
+
-                        });
+                    b.HasKey("CategoryLadderId");
+
+                    b.ToTable("CategoryLadders");
                 });
 
             modelBuilder.Entity("DataLayer.Contributor", b =>
@@ -216,14 +241,23 @@ namespace DataLayer.Migrations
                     b.ToTable("SeriesBook");
                 });
 
-            modelBuilder.Entity("DataLayer.Book", b =>
+            modelBuilder.Entity("CategoryCategoryLadder", b =>
                 {
-                    b.HasOne("DataLayer.Category", "Category")
+                    b.HasOne("DataLayer.Category", null)
                         .WithMany()
-                        .HasForeignKey("CategoryId")
+                        .HasForeignKey("_categoriesCategoryId")
                         .OnDelete(DeleteBehavior.Cascade)
                         .IsRequired();
 
+                    b.HasOne("DataLayer.CategoryLadder", null)
+                        .WithMany()
+                        .HasForeignKey("_categoryLaddersCategoryLadderId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+                });
+
+            modelBuilder.Entity("DataLayer.Book", b =>
+                {
                     b.OwnsOne("DataLayer.Rating", "Rating", b1 =>
                         {
                             b1.Property<int>("BookId")
@@ -324,8 +358,6 @@ namespace DataLayer.Migrations
                             b1.Navigation("Rating");
                         });
 
-                    b.Navigation("Category");
-
                     b.Navigation("Rating");
 
                     b.Navigation("Supplements");
@@ -333,6 +365,25 @@ namespace DataLayer.Migrations
                     b.Navigation("UserDefinedItem");
                 });
 
+            modelBuilder.Entity("DataLayer.BookCategory", b =>
+                {
+                    b.HasOne("DataLayer.Book", "Book")
+                        .WithMany("CategoriesLink")
+                        .HasForeignKey("BookId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.HasOne("DataLayer.CategoryLadder", "CategoryLadder")
+                        .WithMany("BooksLink")
+                        .HasForeignKey("CategoryLadderId")
+                        .OnDelete(DeleteBehavior.Cascade)
+                        .IsRequired();
+
+                    b.Navigation("Book");
+
+                    b.Navigation("CategoryLadder");
+                });
+
             modelBuilder.Entity("DataLayer.BookContributor", b =>
                 {
                     b.HasOne("DataLayer.Book", "Book")
@@ -352,15 +403,6 @@ namespace DataLayer.Migrations
                     b.Navigation("Contributor");
                 });
 
-            modelBuilder.Entity("DataLayer.Category", b =>
-                {
-                    b.HasOne("DataLayer.Category", "ParentCategory")
-                        .WithMany()
-                        .HasForeignKey("ParentCategoryCategoryId");
-
-                    b.Navigation("ParentCategory");
-                });
-
             modelBuilder.Entity("DataLayer.LibraryBook", b =>
                 {
                     b.HasOne("DataLayer.Book", "Book")
@@ -393,11 +435,18 @@ namespace DataLayer.Migrations
 
             modelBuilder.Entity("DataLayer.Book", b =>
                 {
+                    b.Navigation("CategoriesLink");
+
                     b.Navigation("ContributorsLink");
 
                     b.Navigation("SeriesLink");
                 });
 
+            modelBuilder.Entity("DataLayer.CategoryLadder", b =>
+                {
+                    b.Navigation("BooksLink");
+                });
+
             modelBuilder.Entity("DataLayer.Contributor", b =>
                 {
                     b.Navigation("BooksLink");

Source/DataLayer/QueryObjects/BookQueries.cs

@@ -34,7 +34,7 @@ namespace DataLayer
                 // owned items are always loaded. eg: book.UserDefinedItem, book.Supplements
                 .Include(b => b.SeriesLink).ThenInclude(sb => sb.Series)
                 .Include(b => b.ContributorsLink).ThenInclude(c => c.Contributor)
-                .Include(b => b.Category).ThenInclude(c => c.ParentCategory);
+                .Include(b => b.CategoriesLink).ThenInclude(c => c.CategoryLadder).ThenInclude(c => c._categories);
 
         public static bool IsProduct(this Book book)
             => book.ContentType is not ContentType.Episode and not ContentType.Parent;

Source/DataLayer/QueryObjects/CategoryQueries.cs

@@ -0,0 +1,11 @@
+using Microsoft.EntityFrameworkCore;
+using System.Linq;
+
+namespace DataLayer
+{
+	public static class CategoryQueries
+	{
+		public static IQueryable<CategoryLadder> GetCategoryLadders(this LibationContext context)
+			=> context.CategoryLadders.Include(c => c._categories);
+	}
+}

Source/DataLayer/QueryObjects/LibraryBookQueries.cs

@@ -55,7 +55,7 @@ namespace DataLayer
                 // owned items are always loaded. eg: book.UserDefinedItem, book.Supplements
                 .Include(le => le.Book).ThenInclude(b => b.SeriesLink).ThenInclude(sb => sb.Series)
                 .Include(le => le.Book).ThenInclude(b => b.ContributorsLink).ThenInclude(c => c.Contributor)
-                .Include(le => le.Book).ThenInclude(b => b.Category).ThenInclude(c => c.ParentCategory);
+                .Include(le => le.Book).ThenInclude(b => b.CategoriesLink).ThenInclude(c => c.CategoryLadder).ThenInclude(c => c._categories);
 
         public static IEnumerable<LibraryBook> ParentedEpisodes(this IEnumerable<LibraryBook> libraryBooks)
             => libraryBooks.Where(lb => lb.Book.IsEpisodeParent()).SelectMany(libraryBooks.FindChildren);

Source/DtoImporterService/BookImporter.cs

@@ -99,20 +99,6 @@ namespace DtoImporterService
                     .Select(n => contributorImporter.Cache[n.Name])
 					.ToList();
 
-			// categories are laid out for a breadcrumb. category is 1st, subcategory is 2nd
-			// absence of categories is also possible
-
-			// CATEGORY HACK: only use the 1st 2 categories
-			// after we support full arbitrary-depth category trees and multiple categories per book, the real impl will be something like this
-			//   var lastCategory = item.Categories.LastOrDefault()?.CategoryId ?? "";
-			var lastCategory
-				= item.Categories.Length == 0 ? ""
-				: item.Categories.Length == 1 ? item.Categories[0].CategoryId
-				// 2+
-				: item.Categories[1].CategoryId;
-
-			var category = categoryImporter.Cache[lastCategory];
-
 			Book book;
 			try
 			{
@@ -125,7 +111,6 @@ namespace DtoImporterService
 					contentType,
 					authors,
 					narrators,
-					category,
 					importItem.LocaleName)
 					).Entity;
 				Cache.Add(book.AudibleProductId, book);
@@ -140,7 +125,6 @@ namespace DtoImporterService
 					contentType,
 					QtyAuthors = authors?.Count,
 					QtyNarrators = narrators?.Count,
-					Category = category?.Name,
 					importItem.LocaleName
 				});
 				throw;
@@ -165,6 +149,8 @@ namespace DtoImporterService
 		{
 			var item = importItem.DtoItem;
 
+			book.UpdateLengthInMinutes(item.LengthInMinutes);
+
 			// Update the book titles, since formatting can change
 			book.UpdateTitle(item.Title, item.Subtitle);
 
@@ -201,6 +187,19 @@ namespace DtoImporterService
 					book.UpsertSeries(series, seriesEntry.Sequence);
 				}
 			}
+
+			if (item.CategoryLadders is not null)
+			{
+				var ladders = new List<DataLayer.CategoryLadder>();
+				foreach (var ladder in item.CategoryLadders.Select(cl => cl.Ladder).Where(l => l?.Length > 0))
+				{
+					var categoryIds = ladder.Select(l => l.CategoryId).ToList();
+					ladders.Add(categoryImporter.LadderCache.Single(c => c.Equals(categoryIds)));
+				}
+				//Set all ladders at once so ladders that have been
+				//removed by audible can be removed from the DB
+				book.SetCategoryLadders(ladders);
+			}
 		}
 
 		private static DataLayer.ContentType GetContentType(Item item)

Source/DtoImporterService/CategoryImporter.cs

@@ -12,76 +12,86 @@ namespace DtoImporterService
 	{
 		protected override IValidator Validator => new CategoryValidator();
 
-		public Dictionary<string, Category> Cache { get; private set; } = new();
+		private Dictionary<string, Category> CategoryCache { get; set; } = new();
+		public HashSet<DataLayer.CategoryLadder> LadderCache { get; private set; } = new();
 
 		public CategoryImporter(LibationContext context) : base(context) { }
 
 		protected override int DoImport(IEnumerable<ImportItem> importItems)
 		{
-			// get distinct
-			var categoryIds = importItems
-				.Select(i => i.DtoItem)
-				.GetCategoriesDistinct()
-				.Select(c => c.CategoryId)
-				.Distinct()
-				.ToList();
-
 			// load db existing => .Local
-			loadLocal_categories(categoryIds);
+			loadLocal_categories();
 
 			// upsert
-			var categoryPairs = importItems
+			//Import item may not have no (null) categories
-				.Select(i => i.DtoItem)
+			var categoryLadders = importItems
-				.GetCategoryPairsDistinct()
+				.Where(i => i.DtoItem.CategoryLadders is not null)
+				.SelectMany(i => i.DtoItem.CategoryLadders)
+				.Select(cl => cl?.Ladder)
+				.Where(l => l?.Length > 0)
 				.ToList();
-			var qtyNew = upsertCategories(categoryPairs);
+
+			var qtyNew = upsertCategories(categoryLadders);
 			return qtyNew;
 		}
 
-		private void loadLocal_categories(List<string> categoryIds)
+		private void loadLocal_categories()
 		{
-			// must include default/empty/missing
-			categoryIds.Add(Category.GetEmpty().AudibleCategoryId);
-
 			// load existing => local
-			Cache = DbContext.Categories
+			LadderCache = DbContext.GetCategoryLadders().ToHashSet();
-				.Where(c => categoryIds.Contains(c.AudibleCategoryId))
+			CategoryCache = LadderCache.SelectMany(cl => cl.Categories).ToDictionarySafe(c => c.AudibleCategoryId);
-				.ToDictionarySafe(c => c.AudibleCategoryId);
 		}
 
 		// only use after loading contributors => local
-		private int upsertCategories(List<Ladder[]> categoryPairs)
+		private int upsertCategories(List<Ladder[]> ladders)
 		{
 			var qtyNew = 0;
 
-			foreach (var pair in categoryPairs)
+			foreach (var ladder in ladders)
 			{
-				for (var i = 0; i < pair.Length; i++)
+				var categories = new List<Category>(ladder.Length);
+
+				for (var i = 0; i < ladder.Length; i++)
 				{
-					// CATEGORY HACK: not yet supported: depth beyond 0 and 1
+					var id = ladder[i].CategoryId;
-					if (i > 1)
+					var name = ladder[i].CategoryName;
-						break;
 
-					var id = pair[i].CategoryId;
+					if (!CategoryCache.TryGetValue(id, out var category))
-					var name = pair[i].CategoryName;
-
-					Category parentCategory = null;
-					if (i == 1)
-						Cache.TryGetValue(pair[0].CategoryId, out parentCategory);
-
-					if (!Cache.TryGetValue(id, out var category))
 					{
 						category = addCategory(id, name);
-						qtyNew++;
 					}
 
-					category.UpdateParentCategory(parentCategory);
+					categories.Add(category);
+				}
+
+				var categoryLadder = new DataLayer.CategoryLadder(categories);
+				if (!LadderCache.Contains(categoryLadder))
+				{
+					addCategoryLadder(categoryLadder);
+					qtyNew++;
 				}
 			}
 
 			return qtyNew;
 		}
 
+		private DataLayer.CategoryLadder addCategoryLadder(DataLayer.CategoryLadder categoryList)
+		{
+			try
+			{
+				var entityEntry = DbContext.CategoryLadders.Add(categoryList);
+				var entity = entityEntry.Entity;
+
+				LadderCache.Add(entity);
+				return entity;
+			}
+			catch (Exception ex)
+			{
+				Serilog.Log.Logger.Error(ex, "Error adding category ladder. {@DebugInfo}", categoryList);
+				throw;
+			}
+		}
+
 		private Category addCategory(string id, string name)
 		{
 			try
@@ -91,7 +101,7 @@ namespace DtoImporterService
 				var entityEntry = DbContext.Categories.Add(category);
 				var entity = entityEntry.Entity;
 
-				Cache.Add(entity.AudibleCategoryId, entity);
+				CategoryCache.Add(entity.AudibleCategoryId, entity);
 				return entity;
 			}
 			catch (Exception ex)

Source/DtoImporterService/DtoImporterService.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">

Source/FileLiberator/AudioFileStorageExt.cs

@@ -21,7 +21,8 @@ namespace FileLiberator
 				var series = libraryBook.Book.SeriesLink.SingleOrDefault();
 				if (series is not null)
 				{
-					var seriesParent = ApplicationServices.DbContexts.GetContext().GetLibraryBook_Flat_NoTracking(series.Series.AudibleSeriesId);
+					using var context = ApplicationServices.DbContexts.GetContext();
+					var seriesParent = context.GetLibraryBook_Flat_NoTracking(series.Series.AudibleSeriesId);
 
 					if (seriesParent is not null)
 					{

Source/FileLiberator/ConvertToMp3.cs

@@ -51,18 +51,24 @@ namespace FileLiberator
 
 					var config = Configuration.Instance;
 					var lameConfig = GetLameOptions(config);
-
+					var chapters = m4bBook.GetChaptersFromMetadata();
 					//Finishing configuring lame encoder.
 					AaxDecrypter.MpegUtil.ConfigureLameOptions(
 						m4bBook,
 						lameConfig,
 						config.LameDownsampleMono,
-						config.LameMatchSourceBR);
+						config.LameMatchSourceBR,
+						chapters);
 
-					using var mp3File = File.OpenWrite(Path.GetTempFileName());
+					if (m4bBook.AppleTags.Tracks is (int trackNum, int trackCount))
+					{
+						lameConfig.ID3.Track = trackCount > 0 ? $"{trackNum}/{trackCount}" : trackNum.ToString();
+					}
+
+					using var mp3File = File.Open(Path.GetTempFileName(), FileMode.OpenOrCreate, FileAccess.ReadWrite);
 					try
 					{
-						Mp4Operation = m4bBook.ConvertToMp3Async(mp3File, lameConfig);
+						Mp4Operation = m4bBook.ConvertToMp3Async(mp3File, lameConfig, chapters);
 						Mp4Operation.ConversionProgressUpdate += M4bBook_ConversionProgressUpdate;
 						await Mp4Operation;
 

Source/FileLiberator/DownloadDecryptBook.cs

@@ -140,7 +140,7 @@ namespace FileLiberator
                     new AaxcDownloadSingleConverter(outFileName, cacheDir, dlOptions);
 
                 if (config.AllowLibationFixup)
-                    converter.RetrievedMetadata += (_, tags) => tags.Generes = string.Join(", ", libraryBook.Book.CategoriesNames());
+                    converter.RetrievedMetadata += (_, tags) => tags.Generes = string.Join(", ", libraryBook.Book.LowestCategoryNames());
 
                 abDownloader = converter;
             }
@@ -160,21 +160,16 @@ namespace FileLiberator
             {
                 var metadataFile = Templates.File.GetFilename(dlOptions.LibraryBookDto, Path.GetDirectoryName(outFileName), ".metadata.json");
 
-				saveMetadata(libraryBook, contentLic.ContentMetadata, metadataFile);
+                var item = await api.GetCatalogProductAsync(libraryBook.Book.AudibleProductId, AudibleApi.CatalogOptions.ResponseGroupOptions.ALL_OPTIONS);
+				item.SourceJson.Add(nameof(ContentMetadata.ChapterInfo), Newtonsoft.Json.Linq.JObject.FromObject(contentLic.ContentMetadata.ChapterInfo));
+				item.SourceJson.Add(nameof(ContentMetadata.ContentReference), Newtonsoft.Json.Linq.JObject.FromObject(contentLic.ContentMetadata.ContentReference));
+
+				File.WriteAllText(metadataFile, item.SourceJson.ToString());
+				OnFileCreated(libraryBook, metadataFile);
 			}            
 			return success;
         }
 
-		private void saveMetadata(LibraryBook libraryBook, ContentMetadata contentMetadata, string fileName)
-		{
-            var export = Newtonsoft.Json.Linq.JObject.FromObject(LibToDtos.ToDtos(new[] { libraryBook })[0]);
-			export.Add(nameof(contentMetadata.ChapterInfo), Newtonsoft.Json.Linq.JObject.FromObject(contentMetadata.ChapterInfo));
-			export.Add(nameof(contentMetadata.ContentReference), Newtonsoft.Json.Linq.JObject.FromObject(contentMetadata.ContentReference));
-
-			File.WriteAllText(fileName, export.ToString());
-            OnFileCreated(libraryBook, fileName);
-		}
-
 		private DownloadOptions BuildDownloadOptions(LibraryBook libraryBook, Configuration config, ContentLicense contentLic)
         {
 			//If DrmType != Adrm the delivered file is an unencrypted mp3.
@@ -380,8 +375,15 @@ namespace FileLiberator
         {
             if (Configuration.Instance.AllowLibationFixup)
             {
-                e = OnRequestCoverArt();
+                try
-				abDownloader.SetCoverArt(e);
+                {
+                    e = OnRequestCoverArt();
+                    abDownloader.SetCoverArt(e);
+                }
+                catch (Exception ex)
+                {
+                    Serilog.Log.Logger.Error(ex, "Failed to retrieve cover art from server.");
+                }
             }
             
             if (e is not null)

Source/FileLiberator/FileLiberator.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>

Source/FileLiberator/UtilityExtensions.cs

@@ -30,7 +30,7 @@ namespace FileLiberator
 			using var persister = AudibleApiStorage.GetAccountsSettingsPersister();
 			var nickname
 				= persister.AccountsSettings.Accounts
-				.FirstOrDefault(a => a.AccountId == libraryBook.Account)
+				.FirstOrDefault(a => a.AccountId == libraryBook.Account && a.Locale.Name == libraryBook.Book.Locale)
 				?.AccountName;
 
 			return new()

Source/FileManager/BackgroundFileSystem.cs

@@ -5,6 +5,7 @@ using System.IO;
 using System.Linq;
 using System.Threading.Tasks;
 
+#nullable enable
 namespace FileManager
 {
     /// <summary>
@@ -16,9 +17,9 @@ namespace FileManager
         public string SearchPattern { get; private set; }
         public SearchOption SearchOption { get; private set; }
 
-        private FileSystemWatcher fileSystemWatcher { get; set; }
+        private FileSystemWatcher? fileSystemWatcher { get; set; }
-        private BlockingCollection<FileSystemEventArgs> directoryChangesEvents { get; set; }
+        private BlockingCollection<FileSystemEventArgs>? directoryChangesEvents { get; set; }
-        private Task backgroundScanner { get; set; }
+        private Task? backgroundScanner { get; set; }
 
         private object fsCacheLocker { get; } = new();
         private List<LongPath> fsCache { get; } = new();
@@ -32,7 +33,7 @@ namespace FileManager
             Init();
         }
 
-        public LongPath FindFile(System.Text.RegularExpressions.Regex regex)
+        public LongPath? FindFile(System.Text.RegularExpressions.Regex regex)
         {
             lock (fsCacheLocker)
                 return fsCache.FirstOrDefault(s => regex.IsMatch(s));
@@ -105,13 +106,13 @@ namespace FileManager
 
         private void FileSystemWatcher_Changed(object sender, FileSystemEventArgs e)
         {
-            directoryChangesEvents.Add(e);
+            directoryChangesEvents?.Add(e);
         }
 
         #region Background Thread
         private void BackgroundScanner()
         {
-            while (directoryChangesEvents.TryTake(out FileSystemEventArgs change, -1))
+            while (directoryChangesEvents?.TryTake(out var change, -1) is true)
             {
                 lock (fsCacheLocker)
                     UpdateLocalCache(change);

Source/FileManager/FileManager.csproj

@@ -1,12 +1,12 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Dinah.Core" Version="7.2.2.1" />
+    <PackageReference Include="Dinah.Core" Version="8.0.0.1" />
-    <PackageReference Include="Polly" Version="7.2.3" />
+    <PackageReference Include="Polly" Version="8.4.0" />
   </ItemGroup>
 
 	<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">

Source/FileManager/FileUtility.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Linq;
 using System.Text.RegularExpressions;
@@ -7,20 +8,20 @@ using Dinah.Core;
 using Polly;
 using Polly.Retry;
 
+#nullable enable
 namespace FileManager
 {
 	public static class FileUtility
 	{
-
-
 		/// <summary>
 		/// "txt" => ".txt"
 		/// <br />".txt" => ".txt"
 		/// <br />null or whitespace => ""
 		/// </summary>
-		public static string GetStandardizedExtension(string extension)
+		[return: NotNull]
+		public static string GetStandardizedExtension(string? extension)
 			=> string.IsNullOrWhiteSpace(extension)
-			? (extension ?? "")?.Trim()
+			? string.Empty
 			: '.' + extension.Trim().Trim('.');
 
 		/// <summary>
@@ -48,18 +49,18 @@ namespace FileManager
 		/// <br/>- ensure uniqueness
 		/// <br/>- enforce max file length
 		/// </summary>
-		public static LongPath GetValidFilename(LongPath path, ReplacementCharacters replacements, string fileExtension, bool returnFirstExisting = false)
+		public static LongPath GetValidFilename(LongPath path, ReplacementCharacters replacements, string? fileExtension, bool returnFirstExisting = false)
 		{
 			ArgumentValidator.EnsureNotNull(path, nameof(path));
-			ArgumentValidator.EnsureNotNull(fileExtension, nameof(fileExtension));
+			ArgumentValidator.EnsureNotNull(replacements, nameof(replacements));
+
 			fileExtension = GetStandardizedExtension(fileExtension);
 
 			// remove invalid chars
 			path = GetSafePath(path, replacements);
 
 			// ensure uniqueness and check lengths
-			var dir = Path.GetDirectoryName(path);
+			var dir = Path.GetDirectoryName(path)?.TruncateFilename(LongPath.MaxDirectoryLength) ?? string.Empty;
-			dir = dir?.TruncateFilename(LongPath.MaxDirectoryLength) ?? string.Empty;
 
 			var fileName = Path.GetFileName(path);
 			var extIndex = fileName.LastIndexOf(fileExtension, StringComparison.OrdinalIgnoreCase);
@@ -84,6 +85,7 @@ namespace FileManager
 		public static LongPath GetSafePath(LongPath path, ReplacementCharacters replacements)
 		{
 			ArgumentValidator.EnsureNotNull(path, nameof(path));
+			ArgumentValidator.EnsureNotNull(replacements, nameof(replacements));
 
 			var pathNoPrefix = path.PathWithoutPrefix;
 
@@ -159,7 +161,7 @@ namespace FileManager
 			LongPath source,
 			LongPath destination,
 			ReplacementCharacters replacements,
-			string extension = null,
+			string? extension = null,
 			bool overwrite = false)
 		{
 			extension ??= Path.GetExtension(source);
@@ -213,6 +215,9 @@ namespace FileManager
 					SaferDelete(destination);
 
 					var dir = Path.GetDirectoryName(destination);
+					if (dir is null)
+						throw new DirectoryNotFoundException();
+
 					Serilog.Log.Logger.Debug("Attempt to create directory: {@DebugText}", new { dir });
 					Directory.CreateDirectory(dir);
 

Source/FileManager/LogArchiver.cs

@@ -8,9 +8,10 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 
+#nullable enable
 namespace FileManager
 {
-	public sealed class LogArchiver : IAsyncDisposable
+	public sealed class LogArchiver : IAsyncDisposable, IDisposable
 	{
 		public Encoding Encoding { get; set; }
 		public string FileName { get; }
@@ -39,28 +40,28 @@ namespace FileManager
 				e.Delete();
 		}
 
-		public async Task AddFileAsync(string name, JObject contents, string comment = null)
+		public async Task AddFileAsync(string name, JObject contents, string? comment = null)
 		{
 			ArgumentValidator.EnsureNotNull(contents, nameof(contents));
 			await AddFileAsync(name, Encoding.GetBytes(contents.ToString(Newtonsoft.Json.Formatting.Indented)), comment);
 		}
 
-		public async Task AddFileAsync(string name, string contents, string comment = null)
+		public async Task AddFileAsync(string name, string contents, string? comment = null)
 		{
 			ArgumentValidator.EnsureNotNull(contents, nameof(contents));
 			await AddFileAsync(name, Encoding.GetBytes(contents), comment);
 		}
 
-		public Task AddFileAsync(string name, ReadOnlyMemory<byte> contents, string comment = null)
+		public Task AddFileAsync(string name, ReadOnlyMemory<byte> contents, string? comment = null)
 		{
 			ArgumentValidator.EnsureNotNull(name, nameof(name));
 
 			name = ReplacementCharacters.Barebones.ReplaceFilenameChars(name);
-			return Task.Run(() => AddfileInternal(name, contents.Span, comment));			
+			return Task.Run(() => AddFileInternal(name, contents.Span, comment));			
 		}
 
 		private readonly object lockObj = new();
-		private void AddfileInternal(string name, ReadOnlySpan<byte> contents, string comment)
+		private void AddFileInternal(string name, ReadOnlySpan<byte> contents, string? comment)
 		{
 			lock (lockObj)
 			{
@@ -73,5 +74,7 @@ namespace FileManager
 		}
 
 		public async ValueTask DisposeAsync() => await Task.Run(archive.Dispose);
+
+		public void Dispose() => archive.Dispose();
 	}
 }

Source/FileManager/LongPath.cs

@@ -1,9 +1,11 @@
 using Newtonsoft.Json;
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Runtime.InteropServices;
 using System.Text;
 
+#nullable enable
 namespace FileManager
 {
 	public class LongPath
@@ -15,9 +17,9 @@ namespace FileManager
 		public static readonly int MaxPathLength;
 		private const int WIN_MAX_PATH = 260;
 		private const string WIN_LONG_PATH_PREFIX = @"\\?\";
-		internal static readonly bool IsWindows = System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
+		internal static readonly bool IsWindows = RuntimeInformation.IsOSPlatform(OSPlatform.Windows);
-		internal static readonly bool IsLinux = System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(OSPlatform.Linux);
+		internal static readonly bool IsLinux = RuntimeInformation.IsOSPlatform(OSPlatform.Linux);
-		internal static readonly bool IsOSX = System.Runtime.InteropServices.RuntimeInformation.IsOSPlatform(OSPlatform.OSX);
+		internal static readonly bool IsOSX = RuntimeInformation.IsOSPlatform(OSPlatform.OSX);
 	
 		public string Path { get; }
 
@@ -60,7 +62,8 @@ namespace FileManager
 			=> IsWindows ? filename.Length
 			: Encoding.UTF8.GetByteCount(filename);
 
-		public static implicit operator LongPath(string path)
+		[return: NotNullIfNotNull(nameof(path))]
+		public static implicit operator LongPath?(string? path)
 		{
 			if (path is null) return null;
 
@@ -93,7 +96,8 @@ namespace FileManager
 			}
 		}
 
-		public static implicit operator string(LongPath path) => path?.Path;
+		[return: NotNullIfNotNull(nameof(path))]
+		public static implicit operator string?(LongPath? path) => path?.Path;
 
 		[JsonIgnore]
 		public string ShortPathName
@@ -127,8 +131,6 @@ namespace FileManager
 				//for newly-created entries in ther file system. Existing entries made while
 				//8dot3 names were disabled will not be reachable by short paths.
 
-				if (Path is null) return null;
-
 				StringBuilder shortPathBuffer = new(MaxPathLength);
 				GetShortPathName(Path, shortPathBuffer, MaxPathLength);
 				return shortPathBuffer.ToString();
@@ -141,7 +143,6 @@ namespace FileManager
 			get
 			{
 				if (!IsWindows) return Path;
-				if (Path is null) return null;
 
 				StringBuilder longPathBuffer = new(MaxPathLength);
 				GetLongPathName(Path, longPathBuffer, MaxPathLength);
@@ -156,17 +157,18 @@ namespace FileManager
 			{
 				if (!IsWindows) return Path;
 				return
-					Path?.StartsWith(WIN_LONG_PATH_PREFIX) == true ? Path.Remove(0, WIN_LONG_PATH_PREFIX.Length)
+					Path.StartsWith(WIN_LONG_PATH_PREFIX)
-					:Path;
+					? Path.Remove(0, WIN_LONG_PATH_PREFIX.Length)
+					: Path;
 			}
 		}
 
 		public override string ToString() => Path;
 
 		public override int GetHashCode() => Path.GetHashCode();
-		public override bool Equals(object obj) => obj is LongPath other && Path == other.Path;
+		public override bool Equals(object? obj) => obj is LongPath other && Path == other.Path;
-		public static bool operator ==(LongPath path1, LongPath path2) => path1.Equals(path2);
+		public static bool operator ==(LongPath? path1, LongPath? path2) => path1?.Equals(path2) is true;
-		public static bool operator !=(LongPath path1, LongPath path2) => !path1.Equals(path2);
+		public static bool operator !=(LongPath? path1, LongPath? path2) => path1 is null || path2 is null || !path1.Equals(path2);
 
 
 		[DllImport("kernel32.dll", CharSet = CharSet.Unicode)]

Source/FileManager/NamingTemplate/ConditionalTagCollection[TClass].cs

@@ -1,7 +1,9 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq.Expressions;
 using System.Text.RegularExpressions;
 
+#nullable enable
 namespace FileManager.NamingTemplate;
 
 internal interface IClosingPropertyTag : IPropertyTag
@@ -17,7 +19,7 @@ internal interface IClosingPropertyTag : IPropertyTag
 	/// <param name="exactName">The <paramref name="templateString"/> substring that was matched.</param>
 	/// <param name="propertyTag">The registered <see cref="IPropertyTag"/></param>
 	/// <returns>True if the <paramref name="templateString"/> starts with this tag.</returns>
-	bool StartsWithClosing(string templateString, out string exactName, out IClosingPropertyTag propertyTag);
+	bool StartsWithClosing(string templateString, [NotNullWhen(true)] out string? exactName, [NotNullWhen(true)] out IClosingPropertyTag? propertyTag);
 }
 
 public class ConditionalTagCollection<TClass> : TagCollection
@@ -37,6 +39,7 @@ public class ConditionalTagCollection<TClass> : TagCollection
 	
 	private class ConditionalTag : TagBase, IClosingPropertyTag
 	{
+		public override Regex NameMatcher { get; }
 		public Regex NameCloseMatcher { get; }
 
 		public ConditionalTag(ITemplateTag templateTag, RegexOptions options, Expression conditionExpression)
@@ -46,7 +49,7 @@ public class ConditionalTagCollection<TClass> : TagCollection
 			NameCloseMatcher = new Regex($"^<-{templateTag.TagName}>", options);
 		}
 
-		public bool StartsWithClosing(string templateString, out string exactName, out IClosingPropertyTag propertyTag)
+		public bool StartsWithClosing(string templateString, [NotNullWhen(true)] out string? exactName, [NotNullWhen(true)] out IClosingPropertyTag? propertyTag)
 		{
 			var match = NameCloseMatcher.Match(templateString);
 			if (match.Success)

Source/FileManager/NamingTemplate/NamingTemplate.cs

@@ -1,19 +1,21 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Linq.Expressions;
 
+#nullable enable
 namespace FileManager.NamingTemplate;
 
 public class NamingTemplate
 {
-	public string TemplateText { get; private set; }
+	public string TemplateText { get; private set; } = string.Empty;
 	public IEnumerable<ITemplateTag> TagsInUse => _tagsInUse;
 	public IEnumerable<ITemplateTag> TagsRegistered => TagCollections.SelectMany(t => t).DistinctBy(t => t.TagName);
 	public IEnumerable<string> Warnings => errors.Concat(warnings);
 	public IEnumerable<string> Errors => errors;
 
-	private Delegate templateToString;
+	private Delegate? templateToString;
 	private readonly List<string> warnings = new();
 	private readonly List<string> errors = new();
 	private readonly IEnumerable<TagCollection> TagCollections;
@@ -30,6 +32,9 @@ public class NamingTemplate
 	/// <param name="propertyClasses">Instances of the TClass used in <see cref="PropertyTagCollection{TClass}"/> and <see cref="ConditionalTagCollection{TClass}"/></param>
 	public TemplatePart Evaluate(params object[] propertyClasses)
 	{
+		if (templateToString is null)
+			throw new InvalidOperationException();
+
 		// Match propertyClasses to the arguments required by templateToString.DynamicInvoke(). 
 		// First parameter is "this", so ignore it.
 		var delegateArgTypes = templateToString.Method.GetParameters().Skip(1);
@@ -39,7 +44,7 @@ public class NamingTemplate
 		if (args.Length != delegateArgTypes.Count())
 			throw new ArgumentException($"This instance of {nameof(NamingTemplate)} requires the following arguments: {string.Join(", ", delegateArgTypes.Select(t => t.Name).Distinct())}");
 
-		return ((TemplatePart)templateToString.DynamicInvoke(args)).FirstPart;
+		return (templateToString.DynamicInvoke(args) as TemplatePart)!.FirstPart;
 	}
 
 	/// <summary>Parse a template string to a <see cref="NamingTemplate"/></summary>
@@ -69,7 +74,7 @@ public class NamingTemplate
 	}
 
 	/// <summary>Builds an <see cref="Expression"/> tree that will evaluate to a <see cref="TemplatePart"/></summary>
-	private static Expression GetExpressionTree(BinaryNode node)
+	private static Expression GetExpressionTree(BinaryNode? node)
 	{
 		if (node is null) return TemplatePart.Blank;
 		else if (node.IsValue) return node.Expression;
@@ -81,10 +86,10 @@ public class NamingTemplate
 	}
 
 	/// <summary>Parse a template string into a <see cref="BinaryNode"/> tree</summary>
-	private BinaryNode IntermediateParse(string templateString)
+	private BinaryNode IntermediateParse(string? templateString)
 	{
 		if (templateString is null)
-			throw new NullReferenceException(ERROR_NULL_IS_INVALID);
+			throw new ArgumentException(ERROR_NULL_IS_INVALID);
 		else if (string.IsNullOrEmpty(templateString))
 			warnings.Add(WARNING_EMPTY);
 		else if (string.IsNullOrWhiteSpace(templateString))
@@ -93,12 +98,12 @@ public class NamingTemplate
 		TemplateText = templateString;
 
 		BinaryNode topNode = BinaryNode.CreateRoot();
-		BinaryNode currentNode = topNode;
+		BinaryNode? currentNode = topNode;
 		List<char> literalChars = new();
 
 		while (templateString.Length > 0)
 		{
-			if (StartsWith(templateString, out string exactPropertyName, out var propertyTag, out var valueExpression))
+			if (StartsWith(templateString, out var exactPropertyName, out var propertyTag, out var valueExpression))
 			{
 				checkAndAddLiterals();
 
@@ -116,7 +121,7 @@ public class NamingTemplate
 			{
 				checkAndAddLiterals();
 
-				BinaryNode lastParenth = currentNode;
+				BinaryNode? lastParenth = currentNode;
 
 				while (lastParenth?.IsConditional is false)
 					lastParenth = lastParenth.Parent;
@@ -168,7 +173,7 @@ public class NamingTemplate
 		}
 	}
 
-	private bool StartsWith(string template, out string exactName, out IPropertyTag propertyTag, out Expression valueExpression)
+	private bool StartsWith(string template, [NotNullWhen(true)] out string? exactName, [NotNullWhen(true)] out IPropertyTag? propertyTag, [NotNullWhen(true)] out Expression? valueExpression)
 	{
 		foreach (var pc in TagCollections)
 		{
@@ -182,7 +187,7 @@ public class NamingTemplate
 		return false;
 	}
 
-	private bool StartsWithClosing(string template, out string exactName, out IClosingPropertyTag closingPropertyTag)
+	private bool StartsWithClosing(string template, [NotNullWhen(true)] out string? exactName, [NotNullWhen(true)] out IClosingPropertyTag? closingPropertyTag)
 	{
 		foreach (var pc in TagCollections)
 		{
@@ -198,36 +203,36 @@ public class NamingTemplate
 	private class BinaryNode
 	{
 		public string Name { get; }
-		public BinaryNode Parent { get; private set; }
+		public BinaryNode? Parent { get; private set; }
-		public BinaryNode RightChild { get; private set; }
+		public BinaryNode? RightChild { get; private set; }
-		public BinaryNode LeftChild { get; private set; }
+		public BinaryNode? LeftChild { get; private set; }
-		public Expression Expression { get; private init; }
+		public Expression Expression { get; }
 		public bool IsConditional { get; private init; } = false;
 		public bool IsValue { get; private init; } = false;
 
-		public static BinaryNode CreateRoot() => new("Root");
+		public static BinaryNode CreateRoot() => new("Root", Expression.Empty());
 
-		public static BinaryNode CreateValue(string literal) => new("Literal")
+		public static BinaryNode CreateValue(string literal)
-		{
+			=> new("Literal", TemplatePart.CreateLiteral(literal))
-			IsValue = true,
+			{
-			Expression = TemplatePart.CreateLiteral(literal)
+				IsValue = true
-		};
+			};
 
-		public static BinaryNode CreateValue(ITemplateTag templateTag, Expression property) => new(templateTag.TagName)
+		public static BinaryNode CreateValue(ITemplateTag templateTag, Expression property)
-		{
+			=> new(templateTag.TagName, TemplatePart.CreateProperty(templateTag, property))
-			IsValue = true,
+			{
-			Expression = TemplatePart.CreateProperty(templateTag, property)
+				IsValue = true
-		};
+			};
 
-		public static BinaryNode CreateConditional(ITemplateTag templateTag, Expression property) => new(templateTag.TagName)
+		public static BinaryNode CreateConditional(ITemplateTag templateTag, Expression property)
-		{
+			=> new(templateTag.TagName, property)
-			IsConditional = true,
+			{
-			Expression = property
+				IsConditional = true
-		};
+			};
 
 		private static BinaryNode CreateConcatenation(BinaryNode left, BinaryNode right)
 		{
-			var newNode = new BinaryNode("Concatenation")
+			var newNode = new BinaryNode("Concatenation", Expression.Empty())
 			{
 				LeftChild = left,
 				RightChild = right
@@ -237,7 +242,12 @@ public class NamingTemplate
 			return newNode;
 		}
 
-		private BinaryNode(string name) => Name = name;
+		private BinaryNode(string name, Expression expression)
+		{
+			Name = name;
+			Expression = expression;
+		}
+
 		public override string ToString() => Name;
 
 		public BinaryNode AddNewNode(BinaryNode newNode)

Source/FileManager/NamingTemplate/PropertyTagCollection[TClass].cs

@@ -5,6 +5,7 @@ using System.Linq;
 using System.Linq.Expressions;
 using System.Text.RegularExpressions;
 
+#nullable enable
 namespace FileManager.NamingTemplate;
 
 public delegate string PropertyFormatter<T>(ITemplateTag templateTag, T value, string formatString);
@@ -37,7 +38,7 @@ public class PropertyTagCollection<TClass> : TagCollection
 	/// <param name="formatter">Optional formatting function that accepts the <typeparamref name="TProperty"/> property
 	/// and a formatting string and returnes the value the formatted string. If <see cref="null"/>, use the default
 	/// <typeparamref name="TProperty"/> formatter if present, or <see cref="object.ToString"/></param>
-	public void Add<TProperty>(ITemplateTag templateTag, Func<TClass, TProperty?> propertyGetter, PropertyFormatter<TProperty> formatter = null)
+	public void Add<TProperty>(ITemplateTag templateTag, Func<TClass, TProperty?> propertyGetter, PropertyFormatter<TProperty>? formatter = null)
 		where TProperty : struct
 		=> RegisterWithFormatter(templateTag, propertyGetter, formatter);
 
@@ -59,7 +60,7 @@ public class PropertyTagCollection<TClass> : TagCollection
 	/// <param name="formatter">Optional formatting function that accepts the <typeparamref name="TProperty"/> property
 	/// and a formatting string and returnes the value formatted to string. If <see cref="null"/>, use the default
 	/// <typeparamref name="TProperty"/> formatter if present, or <see cref="object.ToString"/></param>
-	public void Add<TProperty>(ITemplateTag templateTag, Func<TClass, TProperty> propertyGetter, PropertyFormatter<TProperty> formatter = null)
+	public void Add<TProperty>(ITemplateTag templateTag, Func<TClass, TProperty> propertyGetter, PropertyFormatter<TProperty>? formatter = null)
 		=> RegisterWithFormatter(templateTag, propertyGetter, formatter);
 
 	/// <summary>
@@ -72,14 +73,15 @@ public class PropertyTagCollection<TClass> : TagCollection
 		=> RegisterWithToString(templateTag, propertyGetter, toString);
 
 	private void RegisterWithFormatter<TProperty, TPropertyValue>
-		(ITemplateTag templateTag, Func<TClass, TProperty> propertyGetter, PropertyFormatter<TPropertyValue> formatter)
+		(ITemplateTag templateTag, Func<TClass, TProperty> propertyGetter, PropertyFormatter<TPropertyValue>? formatter)
 	{
 		ArgumentValidator.EnsureNotNull(templateTag, nameof(templateTag));
 		ArgumentValidator.EnsureNotNull(propertyGetter, nameof(propertyGetter));
 
 		var expr = Expression.Call(Expression.Constant(propertyGetter.Target), propertyGetter.Method, Parameter);
+		formatter ??= GetDefaultFormatter<TPropertyValue>();
 
-		if ((formatter ??= GetDefaultFormatter<TPropertyValue>()) is null)
+		if (formatter is null)
 			AddPropertyTag(new PropertyTag<TPropertyValue>(templateTag, Options, expr, ToStringFunc));
 		else
 			AddPropertyTag(new PropertyTag<TPropertyValue>(templateTag, Options, expr, formatter));
@@ -97,7 +99,7 @@ public class PropertyTagCollection<TClass> : TagCollection
 
 	private static string ToStringFunc<T>(T propertyValue) => propertyValue?.ToString() ?? "";
 
-	private PropertyFormatter<T> GetDefaultFormatter<T>()
+	private PropertyFormatter<T>? GetDefaultFormatter<T>()
 	{
 		try
 		{
@@ -109,6 +111,7 @@ public class PropertyTagCollection<TClass> : TagCollection
 
 	private class PropertyTag<TPropertyValue> : TagBase
 	{
+		public override Regex NameMatcher { get; }
 		private Func<Expression, string, Expression> CreateToStringExpression { get; }
 
 		public PropertyTag(ITemplateTag templateTag, RegexOptions options, Expression propertyGetter, PropertyFormatter<TPropertyValue> formatter)

Source/FileManager/NamingTemplate/TagBase.cs

@@ -1,7 +1,9 @@
 using System;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq.Expressions;
 using System.Text.RegularExpressions;
 
+#nullable enable
 namespace FileManager.NamingTemplate;
 
 internal interface IPropertyTag
@@ -22,13 +24,13 @@ internal interface IPropertyTag
 	/// <param name="exactName">The <paramref name="templateString"/> substring that was matched.</param>
 	/// <param name="propertyValue">The <see cref="Expression"/> that returns the property's value</param>
 	/// <returns>True if the <paramref name="templateString"/> starts with this tag.</returns>
-	bool StartsWith(string templateString, out string exactName, out Expression propertyValue);
+	bool StartsWith(string templateString, [NotNullWhen(true)] out string? exactName, [NotNullWhen(true)] out Expression? propertyValue);
 }
 
 internal abstract class TagBase : IPropertyTag
 {
 	public ITemplateTag TemplateTag { get; }
-	public Regex NameMatcher { get; protected init; }
+	public abstract Regex NameMatcher { get; }
 	public Type ReturnType => ValueExpression.Type;
 	protected Expression ValueExpression { get; }
 
@@ -43,7 +45,7 @@ internal abstract class TagBase : IPropertyTag
 	/// <param name="formatter">The optional format string in the match inside the square brackets</param>
 	protected abstract Expression GetTagExpression(string exactName, string formatter);
 
-	public bool StartsWith(string templateString, out string exactName, out Expression propertyValue)
+	public bool StartsWith(string templateString, [NotNullWhen(true)] out string? exactName, [NotNullWhen(true)] out Expression? propertyValue)
 	{
 		var match = NameMatcher.Match(templateString);
 		if (match.Success)

Source/FileManager/NamingTemplate/TagCollection.cs

@@ -1,10 +1,12 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using System.Linq.Expressions;
 using System.Text.RegularExpressions;
 
+#nullable enable
 namespace FileManager.NamingTemplate;
 
 /// <summary>A collection of <see cref="IPropertyTag"/>s registered to a single <see cref="Type"/>.</summary>
@@ -32,7 +34,7 @@ public abstract class TagCollection : IEnumerable<ITemplateTag>
 	/// <param name="exactName">The <paramref name="templateString"/> substring that was matched.</param>
 	/// <param name="propertyValue">The <see cref="Expression"/> that returns the <paramref name="propertyTag"/>'s value</param>
 	/// <returns>True if the <paramref name="templateString"/> starts with a tag registered in this class.</returns>
-	internal bool StartsWith(string templateString, out string exactName, out IPropertyTag propertyTag, out Expression propertyValue)
+	internal bool StartsWith(string templateString, [NotNullWhen(true)] out string? exactName, [NotNullWhen(true)] out IPropertyTag? propertyTag, [NotNullWhen(true)] out Expression? propertyValue)
 	{
 		foreach (var p in PropertyTags)
 		{
@@ -57,7 +59,7 @@ public abstract class TagCollection : IEnumerable<ITemplateTag>
 	/// <param name="exactName">The <paramref name="templateString"/> substring that was matched.</param>
 	/// <param name="closingPropertyTag">The registered <see cref="IClosingPropertyTag"/></param>
 	/// <returns>True if the <paramref name="templateString"/> starts with this tag.</returns>
-	internal bool StartsWithClosing(string templateString, out string exactName, out IClosingPropertyTag closingPropertyTag)
+	internal bool StartsWithClosing(string templateString, [NotNullWhen(true)] out string? exactName, [NotNullWhen(true)] out IClosingPropertyTag? closingPropertyTag)
 	{
 		foreach (var  cg in PropertyTags.OfType<IClosingPropertyTag>())
 		{

Source/FileManager/NamingTemplate/TemplatePart.cs

@@ -4,6 +4,7 @@ using System.Collections.Generic;
 using System.Linq.Expressions;
 using System.Reflection;
 
+#nullable enable
 namespace FileManager.NamingTemplate;
 
 /// <summary>Represents one part of an evaluated <see cref="NamingTemplate"/>.</summary>
@@ -15,13 +16,13 @@ public class TemplatePart : IEnumerable<TemplatePart>
 
 	/// <summary> The <see cref="IPropertyTag"/>'s <see cref="ITemplateTag"/> if <see cref="TemplatePart"/> is
 	/// a registered property, otherwise <see cref="null"/> for string literals. </summary>
-	public ITemplateTag TemplateTag { get; }
+	public ITemplateTag? TemplateTag { get; }
 
 	/// <summary>The evaluated string.</summary>
 	public string Value { get; }
 
-	private TemplatePart previous;
+	private TemplatePart? previous;
-	private TemplatePart next;
+	private TemplatePart? next;
 	private TemplatePart(string name, string value)
 	{
 		TagName = name;
@@ -53,14 +54,33 @@ public class TemplatePart : IEnumerable<TemplatePart>
 	private static Expression CreateExpression(string name, Expression value)
 		=> Expression.New(constructorInfo, Expression.Constant(name), value);
 
-	private static readonly ConstructorInfo constructorInfo
+	private static readonly ConstructorInfo constructorInfo;
-		= typeof(TemplatePart).GetConstructor(BindingFlags.NonPublic | BindingFlags.Instance, new Type[] { typeof(string), typeof(string) });
+	private static readonly ConstructorInfo tagTemplateConstructorInfo;
+	private static readonly MethodInfo addMethodInfo;
+	static TemplatePart()
+	{
+		var type = typeof(TemplatePart);
 
-	private static readonly ConstructorInfo tagTemplateConstructorInfo
+		if (type.GetConstructor(
-		= typeof(TemplatePart).GetConstructor(BindingFlags.NonPublic | BindingFlags.Instance, new Type[] { typeof(ITemplateTag), typeof(string)	});
+			BindingFlags.NonPublic | BindingFlags.Instance,
+			new Type[] { typeof(string), typeof(string) }) is not ConstructorInfo c1)
+			throw new MissingMethodException(nameof(TemplatePart));
 
-	private static readonly MethodInfo addMethodInfo
+		if (type.GetConstructor(
-		= typeof(TemplatePart).GetMethod(nameof(Concatenate), BindingFlags.NonPublic | BindingFlags.Static, new Type[] { typeof(TemplatePart), typeof(TemplatePart) });
+			BindingFlags.NonPublic | BindingFlags.Instance,
+			new Type[] { typeof(ITemplateTag), typeof(string) }) is not ConstructorInfo c2)
+			throw new MissingMethodException(nameof(TemplatePart));
+
+		if (type.GetMethod(
+			nameof(Concatenate),
+			BindingFlags.NonPublic | BindingFlags.Static,
+			new Type[] { typeof(TemplatePart), typeof(TemplatePart) }) is not MethodInfo m1)
+			throw new MissingMethodException(nameof(Concatenate));
+
+		constructorInfo = c1;
+		tagTemplateConstructorInfo = c2;
+		addMethodInfo = m1;
+	}
 
 	public IEnumerator<TemplatePart> GetEnumerator()
 	{

Source/FileManager/PersistentDictionary.cs

@@ -1,10 +1,12 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Linq;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 
+#nullable enable
 namespace FileManager
 {
     public class PersistentDictionary
@@ -13,19 +15,19 @@ namespace FileManager
         public bool IsReadOnly { get; }
 
         // optimize for strings. expectation is most settings will be strings and a rare exception will be something else
-        private Dictionary<string, string> stringCache { get; } = new Dictionary<string, string>();
+        private Dictionary<string, string?> stringCache { get; } = new();
-        private Dictionary<string, object> objectCache { get; } = new Dictionary<string, object>();
+        private Dictionary<string, object?> objectCache { get; } = new();
 
         public PersistentDictionary(string filepath, bool isReadOnly = false)
         {
             Filepath = filepath;
             IsReadOnly = isReadOnly;
 
-            if (File.Exists(Filepath))
+            if (File.Exists(Filepath) || Path.GetDirectoryName(Filepath) is not string dirName)
                 return;
 
             // will create any missing directories, incl subdirectories. if all already exist: no action
-            Directory.CreateDirectory(Path.GetDirectoryName(filepath));
+            Directory.CreateDirectory(dirName);
 
             if (IsReadOnly)
                 return;
@@ -33,13 +35,14 @@ namespace FileManager
             createNewFile();
         }
 
-        public string GetString(string propertyName, string defaultValue = null)
+		[return: NotNullIfNotNull(nameof(defaultValue))]
+		public string? GetString(string propertyName, string? defaultValue = null)
         {
             if (!stringCache.ContainsKey(propertyName))
             {
                 var jObject = readFile();
                 if (jObject.ContainsKey(propertyName))
-                    stringCache[propertyName] = jObject[propertyName].Value<string>();
+                    stringCache[propertyName] = jObject[propertyName]?.Value<string>();
                 else
                     stringCache[propertyName] = defaultValue;
             }
@@ -47,7 +50,8 @@ namespace FileManager
             return stringCache[propertyName];
         }
 
-        public T GetNonString<T>(string propertyName, T defaultValue = default)
+        [return: NotNullIfNotNull(nameof(defaultValue))]
+        public T? GetNonString<T>(string propertyName, T? defaultValue = default)
         {
             var obj = GetObject(propertyName);
 
@@ -72,21 +76,21 @@ namespace FileManager
             throw new InvalidCastException($"{obj.GetType()} is not convertible to {typeof(T)}");
         }
 
-        public object GetObject(string propertyName)
+        public object? GetObject(string propertyName)
         {
             if (!objectCache.ContainsKey(propertyName))
             {
                 var jObject = readFile();
                 if (!jObject.ContainsKey(propertyName))
                     return null;
-                objectCache[propertyName] = jObject[propertyName].Value<object>();
+                objectCache[propertyName] = jObject[propertyName]?.Value<object>();
             }
 
             return objectCache[propertyName];
         }
 
-        public string GetStringFromJsonPath(string jsonPath, string propertyName) => GetStringFromJsonPath($"{jsonPath}.{propertyName}");
+        public string? GetStringFromJsonPath(string jsonPath, string propertyName) => GetStringFromJsonPath($"{jsonPath}.{propertyName}");
-        public string GetStringFromJsonPath(string jsonPath)
+        public string? GetStringFromJsonPath(string jsonPath)
         {
             if (!stringCache.ContainsKey(jsonPath))
             {
@@ -96,7 +100,7 @@ namespace FileManager
                     var token = jObject.SelectToken(jsonPath);
                     if (token is null)
                         return null;
-                    stringCache[jsonPath] = (string)token;
+                    stringCache[jsonPath] = token.Value<string>();
                 }
                 catch
                 {
@@ -110,7 +114,7 @@ namespace FileManager
         public bool Exists(string propertyName) => readFile().ContainsKey(propertyName);
 
         private object locker { get; } = new object();
-        public void SetString(string propertyName, string newValue)
+        public void SetString(string propertyName, string? newValue)
         {
             // only do this check in string cache, NOT object cache
             if (stringCache.ContainsKey(propertyName) && stringCache[propertyName] == newValue)
@@ -122,7 +126,7 @@ namespace FileManager
             writeFile(propertyName, newValue);
         }
 
-        public void SetNonString(string propertyName, object newValue)
+        public void SetNonString(string propertyName, object? newValue)
         {
             // set cache
             objectCache[propertyName] = newValue;
@@ -160,7 +164,7 @@ namespace FileManager
 			return success;
 		}
 
-        private void writeFile(string propertyName, JToken newValue)
+        private void writeFile(string propertyName, JToken? newValue)
         {
             if (IsReadOnly)
                 return;
@@ -190,7 +194,7 @@ namespace FileManager
 
         /// <summary>WILL ONLY set if already present. WILL NOT create new</summary>
         /// <returns>Value was changed</returns>
-        public bool SetWithJsonPath(string jsonPath, string propertyName, string newValue, bool suppressLogging = false)
+        public bool SetWithJsonPath(string jsonPath, string propertyName, string? newValue, bool suppressLogging = false)
         {
             if (IsReadOnly)
                 return false;
@@ -242,7 +246,7 @@ namespace FileManager
             return true;
         }
 
-        private static string formatValueForLog(string value)
+        private static string formatValueForLog(string? value)
             => value is null ? "[null]"
             : string.IsNullOrEmpty(value) ? "[empty]"
             : string.IsNullOrWhiteSpace(value) ? $"[whitespace. Length={value.Length}]"
@@ -283,7 +287,6 @@ namespace FileManager
         private void createNewFile()
         {
             File.WriteAllText(Filepath, "{}");
-            System.Threading.Thread.Sleep(100);
         }
     }
 }

Source/FileManager/ReplacementCharacters.cs

@@ -5,6 +5,7 @@ using System.Collections.Generic;
 using System.IO;
 using System.Linq;
 
+#nullable enable
 namespace FileManager
 {
 	public record Replacement
@@ -59,7 +60,7 @@ namespace FileManager
 	[JsonConverter(typeof(ReplacementCharactersConverter))]
 	public class ReplacementCharacters
 	{
-		public override bool Equals(object obj)
+		public override bool Equals(object? obj)
 		{
 			if (obj is ReplacementCharacters second && Replacements.Count == second.Replacements.Count)
 			{
@@ -173,7 +174,7 @@ namespace FileManager
 				Path.DirectorySeparatorChar, Path.AltDirectorySeparatorChar
 			}).ToArray();
 
-		public IReadOnlyList<Replacement> Replacements { get; init; }
+		required public IReadOnlyList<Replacement> Replacements { get; init; }
 		private string DefaultReplacement => Replacements[0].ReplacementString;
 		private Replacement ForwardSlash => Replacements[1];
 		private Replacement BackSlash => Replacements[2];
@@ -298,12 +299,14 @@ namespace FileManager
 		public override bool CanConvert(Type objectType)
 			=> objectType == typeof(ReplacementCharacters);
 
-		public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
+		public override object ReadJson(JsonReader reader, Type objectType, object? existingValue, JsonSerializer serializer)
 		{
 			var jObj = JObject.Load(reader);
 			var replaceArr = jObj[nameof(Replacement)];
-			IReadOnlyList<Replacement> dict = replaceArr
+			var dict
-				.ToObject<Replacement[]>().ToList();
+				= replaceArr?.ToObject<Replacement[]>()?.ToList()
+				?? ReplacementCharacters.Default.Replacements;
+
 
 			//Ensure that the first 6 replacements are for the expected chars and that all replacement strings are valid.
 			//If not, reset to default.
@@ -325,9 +328,10 @@ namespace FileManager
 			return new ReplacementCharacters { Replacements = dict };
 		}
 
-		public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)
+		public override void WriteJson(JsonWriter writer, object? value, JsonSerializer serializer)
 		{
-			ReplacementCharacters replacements = (ReplacementCharacters)value;
+			if (value is not ReplacementCharacters replacements)
+				return;
 
 			var propertyNames = replacements.Replacements
 				.Select(JObject.FromObject).ToList();

Source/HangoverAvalonia/HangoverAvalonia.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 	<PropertyGroup>
 		<OutputType>WinExe</OutputType>
-		<TargetFramework>net7.0</TargetFramework>
+		<TargetFramework>net8.0</TargetFramework>
 		<RuntimeIdentifier>win-x64</RuntimeIdentifier>
 		<!--Avalonia doesen't support TrimMode=link currently,but we are working on that https://github.com/AvaloniaUI/Avalonia/issues/6892 -->
 		<TrimMode>copyused</TrimMode>
@@ -21,9 +21,13 @@
 		<ApplicationIcon>hangover.ico</ApplicationIcon>
 	</PropertyGroup>
 
-  <PropertyGroup>
+	<ItemGroup>
-    <SatelliteResourceLanguages>en</SatelliteResourceLanguages>
+		<RuntimeHostConfigurationOption Include="System.Net.DisableIPv6" Value="true" />
-  </PropertyGroup>
+	</ItemGroup>
+
+	<PropertyGroup>
+		<SatelliteResourceLanguages>en</SatelliteResourceLanguages>
+	</PropertyGroup>
 
 	<PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
 		<OutputPath>..\bin\Avalonia\Debug</OutputPath>
@@ -67,13 +71,13 @@
 	</ItemGroup>
 	<ItemGroup>
 
-		<PackageReference Include="Avalonia" Version="11.0.0" />
+		<PackageReference Include="Avalonia" Version="11.0.5" />
-		<PackageReference Include="Avalonia.Desktop" Version="11.0.0" />
+		<PackageReference Include="Avalonia.Desktop" Version="11.0.5" />
 		<!--Condition below is needed to remove Avalonia.Diagnostics package from build output in Release configuration.-->
-		<PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="11.0.0" />
+		<PackageReference Condition="'$(Configuration)' == 'Debug'" Include="Avalonia.Diagnostics" Version="11.0.5" />
-		<PackageReference Include="Avalonia.ReactiveUI" Version="11.0.0" />
+		<PackageReference Include="Avalonia.ReactiveUI" Version="11.0.5" />
-		<PackageReference Include="Avalonia.Controls.ItemsRepeater" Version="11.0.0" />
+		<PackageReference Include="Avalonia.Controls.ItemsRepeater" Version="11.0.5" />
-		<PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.0" />
+		<PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.5" />
 	</ItemGroup>
 	<ItemGroup>
 		<ProjectReference Include="..\HangoverBase\HangoverBase.csproj" />

Source/HangoverAvalonia/Properties/PublishProfiles/LinuxProfile.pubxml

@@ -8,7 +8,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <Platform>Any CPU</Platform>
     <PublishDir>..\bin\Publish\Linux-chardonnay</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <RuntimeIdentifier>linux-x64</RuntimeIdentifier>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>false</PublishSingleFile>

Source/HangoverAvalonia/Properties/PublishProfiles/MacOSProfile.pubxml

@@ -8,7 +8,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <Platform>Any CPU</Platform>
     <PublishDir>..\bin\Publish\MacOS-chardonnay</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <RuntimeIdentifier>osx-x64</RuntimeIdentifier>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>false</PublishSingleFile>

Source/HangoverAvalonia/Properties/PublishProfiles/WindowsProfile.pubxml

@@ -8,7 +8,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <Platform>Any CPU</Platform>
     <PublishDir>..\bin\Publish\Windows-chardonnay</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <RuntimeIdentifier>win-x64</RuntimeIdentifier>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>false</PublishSingleFile>

Source/HangoverBase/HangoverBase.csproj

@@ -1,7 +1,7 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
   <PropertyGroup>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <ImplicitUsings>enable</ImplicitUsings>
   </PropertyGroup>
 

Source/HangoverWinForms/HangoverWinForms.csproj

@@ -2,7 +2,7 @@
 
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net7.0-windows</TargetFramework>
+    <TargetFramework>net8.0-windows7.0</TargetFramework>
     <EnableWindowsTargeting>true</EnableWindowsTargeting>
 	<AssemblyName>Hangover</AssemblyName>
     <UseWindowsForms>true</UseWindowsForms>
@@ -15,6 +15,10 @@
     <AppendRuntimeIdentifierToOutputPath>false</AppendRuntimeIdentifierToOutputPath>
   </PropertyGroup>
 
+  <ItemGroup>
+    <RuntimeHostConfigurationOption Include="System.Net.DisableIPv6" Value="true" />
+  </ItemGroup>
+
   <PropertyGroup>
     <SatelliteResourceLanguages>en</SatelliteResourceLanguages>
   </PropertyGroup>

Source/HangoverWinForms/Properties/PublishProfiles/WindowsProfile.pubxml

@@ -8,7 +8,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <Platform>Any CPU</Platform>
     <PublishDir>..\bin\Publish\classic</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>net7.0-windows</TargetFramework>
+    <TargetFramework>net8.0-windows</TargetFramework>
     <RuntimeIdentifier>win-x64</RuntimeIdentifier>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>false</PublishSingleFile>

Source/Libation.sln

@@ -6,6 +6,7 @@ MinimumVisualStudioVersion = 10.0.40219.1
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "_Solution Items", "_Solution Items", "{03C8835F-936C-4AF7-87AE-FF92BDBE8B9B}"
 	ProjectSection(SolutionItems) = preProject
 		REFERENCE.txt = REFERENCE.txt
+		Upgrading dotnet version.txt = Upgrading dotnet version.txt
 		_ARCHITECTURE NOTES.txt = _ARCHITECTURE NOTES.txt
 		_AvaloniaUI Primer.txt = _AvaloniaUI Primer.txt
 		_DB_NOTES.txt = _DB_NOTES.txt

Source/LibationAvalonia/App.axaml

@@ -44,9 +44,9 @@
 
 					<SolidColorBrush x:Key="CancelRed" Color="#802727" />
 					<SolidColorBrush x:Key="IconFill" Color="#DCE0DF" />
-					<SolidColorBrush x:Key="StoplightRed" Color="#5F0707" />
+					<SolidColorBrush x:Key="StoplightRed" Color="#7d1f1f" />
-					<SolidColorBrush x:Key="StoplightYellow" Color="#5F5B1A" />
+					<SolidColorBrush x:Key="StoplightYellow" Color="#7d7d1f" />
-					<SolidColorBrush x:Key="StoplightGreen" Color="#174E15" />
+					<SolidColorBrush x:Key="StoplightGreen" Color="#1f7d1f" />
 
 
 					<SolidColorBrush x:Key="DisabledGrayBrush" Opacity="0.4"  Color="{StaticResource SystemChromeMediumColor}" />

Source/LibationAvalonia/Controls/DirectoryOrCustomSelectControl.axaml.cs

@@ -107,7 +107,7 @@ namespace LibationAvalonia.Controls
 
 				if (known is Configuration.KnownDirectories.None)
 				{
-					directoryState.CustomDir = noSubDir;
+					directoryState.CustomDir = directory;
 					directoryState.CustomChecked = true;
 				}
 				else

Source/LibationAvalonia/Controls/Settings/Important.axaml

@@ -97,7 +97,8 @@
 
 		<controls:GroupBox
 			Grid.Row="2"
-			Margin="5">
+			Margin="5"
+			Label="Display Settings">
 			<Grid
 				RowDefinitions="Auto,Auto"
 				ColumnDefinitions="Auto,Auto,*">

Source/LibationAvalonia/Dialogs/BookDetailsDialog.axaml.cs

@@ -115,7 +115,7 @@ Author(s): {Book.AuthorNames()}
 Narrator(s): {Book.NarratorNames()}
 Length: {(Book.LengthInMinutes == 0 ? "" : $"{Book.LengthInMinutes / 60} hr {Book.LengthInMinutes % 60} min")}
 Audio Bitrate: {Book.AudioFormat}
-Category: {string.Join(" > ", Book.CategoriesNames())}
+Category: {string.Join(", ", Book.LowestCategoryNames())}
 Purchase Date: {libraryBook.DateAdded:d}
 Language: {Book.Language}
 Audible ID: {Book.AudibleProductId}

Source/LibationAvalonia/Dialogs/LibationFilesDialog.axaml

@@ -27,6 +27,6 @@
 			Margin="5"
 			Padding="30,3,30,3"
 			Content="Save"
-			Command="{Binding SaveButtonAsync}" />
+			Click="Save_Click" />
 	</Grid>
 </Window>

Source/LibationAvalonia/Dialogs/LibationFilesDialog.axaml.cs

@@ -1,11 +1,9 @@
-using Avalonia.Controls;
 using LibationFileManager;
 using System.Collections.Generic;
-using System.Threading.Tasks;
 
 namespace LibationAvalonia.Dialogs
 {
-	public partial class LibationFilesDialog : Window
+	public partial class LibationFilesDialog : DialogWindow
 	{
 		private class DirSelectOptions
 		{
@@ -18,28 +16,26 @@ namespace LibationAvalonia.Dialogs
 
 			public string Directory { get; set; } = Configuration.GetKnownDirectoryPath(Configuration.KnownDirectories.UserProfile);
 		}
-		private DirSelectOptions dirSelectOptions;
+
+		private readonly DirSelectOptions dirSelectOptions;
 		public string SelectedDirectory => dirSelectOptions.Directory;
-		public DialogResult DialogResult { get; private set; }
+
-		public LibationFilesDialog()
+		public LibationFilesDialog() : base(saveAndRestorePosition: false)
 		{
 			InitializeComponent();
 
 			DataContext = dirSelectOptions = new();
 		}
 
-		public async Task SaveButtonAsync()
+		public async void Save_Click(object sender, Avalonia.Interactivity.RoutedEventArgs e)
 		{
-			var libationDir = dirSelectOptions.Directory;
+			if (!System.IO.Directory.Exists(SelectedDirectory))
-
-			if (!System.IO.Directory.Exists(libationDir))
 			{
-				await MessageBox.Show("Not saving change to Libation Files location. This folder does not exist:\r\n" + libationDir, "Folder does not exist", MessageBoxButtons.OK, MessageBoxIcon.Error, saveAndRestorePosition: false);
+				await MessageBox.Show("Not saving change to Libation Files location. This folder does not exist:\r\n" + SelectedDirectory, "Folder does not exist", MessageBoxButtons.OK, MessageBoxIcon.Error, saveAndRestorePosition: false);
 				return;
 			}
 
-			DialogResult = DialogResult.OK;
+			await SaveAndCloseAsync();
-			Close(DialogResult);
 		}
 	}
 }

Source/LibationAvalonia/Dialogs/SettingsDialog.axaml

@@ -2,8 +2,8 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        mc:Ignorable="d" d:DesignWidth="900" d:DesignHeight="750"
+        mc:Ignorable="d" d:DesignWidth="900" d:DesignHeight="200"
-		MinWidth="900" MinHeight="750"
+		MinWidth="900" MinHeight="200"
 		Width="900" Height="750"
         x:Class="LibationAvalonia.Dialogs.SettingsDialog"
         xmlns:controls="clr-namespace:LibationAvalonia.Controls"
@@ -46,39 +46,41 @@
 			</TabControl.Styles>
 
 			<TabItem>
-
 				<TabItem.Header>
 					<TextBlock Text="Important Settings"/>
 				</TabItem.Header>
 
-				<settings:Important DataContext="{CompiledBinding ImportantSettings}" />
+				<ScrollViewer VerticalScrollBarVisibility="Auto">
+					<settings:Important DataContext="{CompiledBinding ImportantSettings}" />
+				</ScrollViewer>
 			</TabItem>
-
 			<TabItem>
-
 				<TabItem.Header>
 					<TextBlock Text="Import Library"/>
 				</TabItem.Header>
 
-				<settings:Import DataContext="{CompiledBinding ImportSettings}" />
+				<ScrollViewer VerticalScrollBarVisibility="Auto">
+					<settings:Import DataContext="{CompiledBinding ImportSettings}" />
+				</ScrollViewer>
 			</TabItem>
 
 			<TabItem>
-
 				<TabItem.Header>
 					<TextBlock Text="Download/Decrypt"/>
 				</TabItem.Header>
-
+				
-				<settings:DownloadDecrypt DataContext="{CompiledBinding DownloadDecryptSettings}" />
+				<ScrollViewer VerticalScrollBarVisibility="Auto">
+					<settings:DownloadDecrypt DataContext="{CompiledBinding DownloadDecryptSettings}" />
+				</ScrollViewer>
 			</TabItem>
-
+			
 			<TabItem>
-
 				<TabItem.Header>
 					<TextBlock Text="Audio File Settings"/>
 				</TabItem.Header>
-
+				<ScrollViewer VerticalScrollBarVisibility="Auto">
-				<settings:Audio DataContext="{CompiledBinding AudioSettings}" />
+					<settings:Audio DataContext="{CompiledBinding AudioSettings}" />
+				</ScrollViewer>
 			</TabItem>
 		</TabControl>
 	</Grid>

Source/LibationAvalonia/LibationAvalonia.csproj

@@ -3,7 +3,7 @@
 
 	<PropertyGroup>
 		<OutputType>WinExe</OutputType>
-		<TargetFramework>net7.0-windows</TargetFramework>
+		<TargetFramework>net8.0-windows7.0</TargetFramework>
 		<RuntimeIdentifier>win-x64</RuntimeIdentifier>
 		<BuiltInComInteropSupport>true</BuiltInComInteropSupport>
 		<ApplicationIcon>Assets/libation.ico</ApplicationIcon>
@@ -14,6 +14,10 @@
 		<AppendRuntimeIdentifierToOutputPath>false</AppendRuntimeIdentifierToOutputPath>
 		<StartupObject />
 	</PropertyGroup>
+	
+	<ItemGroup>
+		<RuntimeHostConfigurationOption Include="System.Net.DisableIPv6" Value="true" />
+	</ItemGroup>
 
 	<PropertyGroup>
 		<SatelliteResourceLanguages>en</SatelliteResourceLanguages>
@@ -69,14 +73,14 @@
 		<UpToDateCheckInput Remove="Controls\GroupBox.axaml" />
 	</ItemGroup>
 
-	<ItemGroup>		
+	<ItemGroup>
-		<PackageReference Include="Avalonia.Diagnostics" Version="11.0.0" Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'" />
+		<PackageReference Include="Avalonia.Diagnostics" Version="11.0.5" Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'" />
-		<PackageReference Include="Avalonia" Version="11.0.0" />
+		<PackageReference Include="Avalonia" Version="11.0.5" />
-		<PackageReference Include="Avalonia.Controls.DataGrid" Version="11.0.0" />
+		<PackageReference Include="Avalonia.Controls.DataGrid" Version="11.0.5" />
-		<PackageReference Include="Avalonia.Controls.ItemsRepeater" Version="11.0.0" />
+		<PackageReference Include="Avalonia.Controls.ItemsRepeater" Version="11.0.5" />
-		<PackageReference Include="Avalonia.Desktop" Version="11.0.0" />
+		<PackageReference Include="Avalonia.Desktop" Version="11.0.5" />
-		<PackageReference Include="Avalonia.ReactiveUI" Version="11.0.0" />
+		<PackageReference Include="Avalonia.ReactiveUI" Version="11.0.5" />
-		<PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.0" />
+		<PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.5" />
 	</ItemGroup>
 
 	<ItemGroup>

Source/LibationAvalonia/MessageBox.cs

@@ -177,9 +177,12 @@ Libation.
 			tbx.MinWidth = vm.TextBlockMinWidth;
 			tbx.Text = message;
 
-			var thisScreen = owner.Screens.ScreenFromVisual(owner);
+			
+			var thisScreen = owner.Screens?.ScreenFromVisual(owner);
 
-			var maxSize = new Size(0.20 * thisScreen.Bounds.Width, 0.9 * thisScreen.Bounds.Height - 55);
+			var maxSize
+				= thisScreen is null ? owner.ClientSize
+				: new Size(0.20 * thisScreen.Bounds.Width, 0.9 * thisScreen.Bounds.Height - 55);
 
 			var desiredMax = new Size(maxSize.Width, maxSize.Height);
 

Source/LibationAvalonia/Program.cs

@@ -36,6 +36,7 @@ namespace LibationAvalonia
 			}
 			AppDomain.CurrentDomain.UnhandledException += (o, e) => LogError(e.ExceptionObject);
 
+			bool loggingEnabled = false;
 			//***********************************************//
 			//                                               //
 			//   do not use Configuration before this line   //
@@ -55,6 +56,7 @@ namespace LibationAvalonia
 					// most migrations go in here
 					LibationScaffolding.RunPostConfigMigrations(config);
 					LibationScaffolding.RunPostMigrationScaffolding(Variety.Chardonnay, config);
+					loggingEnabled = true;
 
 					//Start loading the library before loading the main form
 					App.LibraryTask = Task.Run(() => DbContexts.GetLibrary_Flat_NoTracking(includeParents: true));
@@ -64,9 +66,12 @@ namespace LibationAvalonia
 
 				classicLifetimeTask.Result.Start(null);
 			}
-			catch(Exception e)
+			catch (Exception ex)
 			{
-				LogError(e);
+				if (loggingEnabled)
+					Serilog.Log.Logger.Error(ex, "CRASH");
+				else
+					LogError(ex);
 			}
 		}
 

Source/LibationAvalonia/Properties/PublishProfiles/LinuxProfile.pubxml

@@ -8,7 +8,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <Platform>Any CPU</Platform>
     <PublishDir>..\bin\Publish\Linux-chardonnay</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <RuntimeIdentifier>linux-x64</RuntimeIdentifier>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>false</PublishSingleFile>

Source/LibationAvalonia/Properties/PublishProfiles/MacOSProfile.pubxml

@@ -8,7 +8,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <Platform>Any CPU</Platform>
     <PublishDir>..\bin\Publish\MacOS-chardonnay</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <RuntimeIdentifier>osx-x64</RuntimeIdentifier>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>false</PublishSingleFile>

Source/LibationAvalonia/Properties/PublishProfiles/WindowsProfile.pubxml

@@ -8,7 +8,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <Platform>Any CPU</Platform>
     <PublishDir>..\bin\Publish\Windows-chardonnay</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>net7.0-windows</TargetFramework>
+    <TargetFramework>net8.0-windows</TargetFramework>
     <RuntimeIdentifier>win-x64</RuntimeIdentifier>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>false</PublishSingleFile>

Source/LibationAvalonia/ViewModels/ProcessBookViewModel.cs

@@ -265,7 +265,7 @@ namespace LibationAvalonia.ViewModels
 		private byte[] AudioDecodable_RequestCoverArt(object sender, EventArgs e)
 		{
 			var quality
-				= Configuration.Instance.FileDownloadQuality == Configuration.DownloadQuality.High
+				= Configuration.Instance.FileDownloadQuality == Configuration.DownloadQuality.High && LibraryBook.Book.PictureLarge is not null
 				? new PictureDefinition(LibraryBook.Book.PictureLarge, PictureSize.Native)
 				: new PictureDefinition(LibraryBook.Book.PictureId, PictureSize._500x500);
 

Source/LibationAvalonia/ViewModels/ProductsDisplayViewModel.cs

@@ -1,15 +1,18 @@
 using ApplicationServices;
 using AudibleUtilities;
 using Avalonia.Collections;
+using Avalonia.Controls;
 using Avalonia.Threading;
 using DataLayer;
 using LibationAvalonia.Dialogs.Login;
+using LibationFileManager;
 using LibationUiBase.GridView;
 using ReactiveUI;
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Threading.Tasks;
 
 namespace LibationAvalonia.ViewModels
@@ -27,8 +30,8 @@ namespace LibationAvalonia.ViewModels
 		public string FilterString { get; private set; }
 		public DataGridCollectionView GridEntries { get; private set; }
 
-		private bool _removeColumnVisivle;
+		private bool _removeColumnVisible;
-		public bool RemoveColumnVisivle { get => _removeColumnVisivle; private set => this.RaiseAndSetIfChanged(ref _removeColumnVisivle, value); }
+		public bool RemoveColumnVisible { get => _removeColumnVisible; private set => this.RaiseAndSetIfChanged(ref _removeColumnVisible, value); }
 
 		public List<LibraryBook> GetVisibleBookEntries()
 			=> FilteredInGridEntries?
@@ -99,10 +102,10 @@ namespace LibationAvalonia.ViewModels
 
 			var seriesEntries = await SeriesEntry<AvaloniaEntryStatus>.GetAllSeriesEntriesAsync(dbBooks);
 
-			SOURCE.AddRange(geList.Concat(seriesEntries).OrderDescending(new RowComparer(null)));
-
 			//Create the filtered-in list before adding entries to avoid a refresh
 			FilteredInGridEntries = geList.Union(seriesEntries.SelectMany(s => s.Children)).FilterEntries(FilterString);
+			//Adding entries to the Source list will invoke CollectionFilter
+			SOURCE.AddRange(geList.Concat(seriesEntries).OrderDescending(new RowComparer(null)));
 
 			//Add all children beneath their parent
 			foreach (var series in seriesEntries)
@@ -321,7 +324,7 @@ namespace LibationAvalonia.ViewModels
 		{
 			foreach (var item in SOURCE)
 				item.PropertyChanged -= GridEntry_PropertyChanged;
-			RemoveColumnVisivle = false;
+			RemoveColumnVisible = false;
 		}
 
 		public async Task RemoveCheckedBooksAsync()
@@ -376,7 +379,7 @@ namespace LibationAvalonia.ViewModels
 				item.PropertyChanged += GridEntry_PropertyChanged;
 			}
 
-			RemoveColumnVisivle = true;
+			RemoveColumnVisible = true;
 			RemovableCountChanged?.Invoke(this, 0);
 
 			try
@@ -421,5 +424,44 @@ namespace LibationAvalonia.ViewModels
 		}
 
 		#endregion
+
+		#region Column Widths
+
+		public DataGridLength TitleWidth { get => getColumnWidth("Title", 200); set => setColumnWidth("Title", value); }
+		public DataGridLength AuthorsWidth { get => getColumnWidth("Authors", 100); set => setColumnWidth("Authors", value); }
+		public DataGridLength NarratorsWidth { get => getColumnWidth("Narrators", 100); set => setColumnWidth("Narrators", value); }
+		public DataGridLength LengthWidth { get => getColumnWidth("Length", 80); set => setColumnWidth("Length", value); }
+		public DataGridLength SeriesWidth { get => getColumnWidth("Series", 100); set => setColumnWidth("Series", value); }
+		public DataGridLength SeriesOrderWidth { get => getColumnWidth("SeriesOrder", 60); set => setColumnWidth("SeriesOrder", value); }
+		public DataGridLength DescriptionWidth { get => getColumnWidth("Description", 100); set => setColumnWidth("Description", value); }
+		public DataGridLength CategoryWidth { get => getColumnWidth("Category", 100); set => setColumnWidth("Category", value); }
+		public DataGridLength ProductRatingWidth { get => getColumnWidth("ProductRating", 95); set => setColumnWidth("ProductRating", value); }
+		public DataGridLength PurchaseDateWidth { get => getColumnWidth("PurchaseDate", 75); set => setColumnWidth("PurchaseDate", value); }
+		public DataGridLength MyRatingWidth { get => getColumnWidth("MyRating", 95); set => setColumnWidth("MyRating", value); }
+		public DataGridLength MiscWidth { get => getColumnWidth("Misc", 140); set => setColumnWidth("Misc", value); }
+		public DataGridLength LastDownloadWidth { get => getColumnWidth("LastDownload", 100); set => setColumnWidth("LastDownload", value); }
+		public DataGridLength BookTagsWidth { get => getColumnWidth("BookTags", 100); set => setColumnWidth("BookTags", value); }
+
+		private static DataGridLength getColumnWidth(string columnName, double defaultWidth)
+			=> Configuration.Instance.GridColumnsWidths.TryGetValue(columnName, out var val)
+			? new DataGridLength(val)
+			: new DataGridLength(defaultWidth);
+
+		private void setColumnWidth(string columnName, DataGridLength width, [CallerMemberName] string propertyName = "")
+		{
+			var dictionary = Configuration.Instance.GridColumnsWidths;
+
+			var newValue = (int)width.DisplayValue;
+			var valueSame = dictionary.TryGetValue(columnName, out var val) && val == newValue;
+			dictionary[columnName] = newValue;
+
+			if (!valueSame)
+			{
+				Configuration.Instance.GridColumnsWidths = dictionary;
+				this.RaisePropertyChanged(propertyName);
+			}
+		}
+
+		#endregion
 	}
 }

Source/LibationAvalonia/Views/MainWindow.axaml.cs

@@ -21,7 +21,7 @@ namespace LibationAvalonia.Views
 			InitializeComponent();
 			Configure_Upgrade();
 
-			Loaded += MainWindow_Loaded;
+			Opened += MainWindow_Opened;
 			Closing += MainWindow_Closing;
 			LibraryLoaded += MainWindow_LibraryLoaded;
 
@@ -35,7 +35,7 @@ namespace LibationAvalonia.Views
 			}
 		}
 
-		private async void MainWindow_Loaded(object sender, EventArgs e)
+		private async void MainWindow_Opened(object sender, EventArgs e)
 		{
 			if (Configuration.Instance.FirstLaunch)
 			{

Source/LibationAvalonia/Views/ProductsDisplay.axaml

@@ -17,6 +17,7 @@
 			AutoGenerateColumns="False"
 			ItemsSource="{Binding GridEntries}"
 			CanUserSortColumns="True" BorderThickness="3"
+			CanUserResizeColumns="True"
 			CanUserReorderColumns="True">
 
 			<DataGrid.Styles>
@@ -45,10 +46,11 @@
 			</DataGrid.Styles>
 			
 			<DataGrid.Columns>
-
+ 
 				<DataGridTemplateColumn
 					CanUserSort="True"
-					IsVisible="{Binding RemoveColumnVisivle}"
+					CanUserResize="False"
+					IsVisible="{Binding RemoveColumnVisible}"
 					PropertyChanged="RemoveColumn_PropertyChanged"
 					Header="Remove"
 					IsReadOnly="False"
@@ -65,7 +67,7 @@
 					</DataGridTemplateColumn.CellTemplate>
 				</DataGridTemplateColumn>
 
-				<controls:DataGridTemplateColumnExt CanUserSort="True" Header="Liberate" SortMemberPath="Liberate" ClipboardContentBinding="{Binding Liberate.ToolTip}">
+				<controls:DataGridTemplateColumnExt CanUserResize="False" CanUserSort="True" Header="Liberate" SortMemberPath="Liberate" ClipboardContentBinding="{Binding Liberate.ToolTip}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<views:LiberateStatusButton
@@ -80,15 +82,15 @@
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
 
-				<controls:DataGridTemplateColumnExt CanUserSort="False" Header="Cover" SortMemberPath="Cover" ClipboardContentBinding="{Binding LibraryBook.Book.PictureLarge}">
+				<controls:DataGridTemplateColumnExt CanUserResize="False" CanUserSort="False" Header="Cover" SortMemberPath="Cover" ClipboardContentBinding="{Binding LibraryBook.Book.PictureLarge}">
 					<DataGridTemplateColumn.CellTemplate>
-						<DataTemplate  x:DataType="uibase:IGridEntry">
+						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Image Opacity="{CompiledBinding Liberate.Opacity}" Tapped="Cover_Click" Source="{CompiledBinding Cover}" ToolTip.Tip="Click to see full size" />
 						</DataTemplate>
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
 
-				<controls:DataGridTemplateColumnExt MinWidth="150" Width="2*" Header="Title" CanUserSort="True" SortMemberPath="Title" ClipboardContentBinding="{Binding Title}">
+				<controls:DataGridTemplateColumnExt Header="Title" MinWidth="10" Width="{Binding TitleWidth, Mode=TwoWay}" CanUserSort="True" SortMemberPath="Title" ClipboardContentBinding="{Binding Title}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Panel Opacity="{CompiledBinding Liberate.Opacity}" Background="{CompiledBinding Liberate.BackgroundBrush}">
@@ -98,7 +100,7 @@
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
 
-				<controls:DataGridTemplateColumnExt MinWidth="80" Width="1*" Header="Authors" CanUserSort="True" SortMemberPath="Authors" ClipboardContentBinding="{Binding Authors}">
+				<controls:DataGridTemplateColumnExt Header="Authors" MinWidth="10" Width="{Binding AuthorsWidth, Mode=TwoWay}" CanUserSort="True" SortMemberPath="Authors" ClipboardContentBinding="{Binding Authors}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Panel Opacity="{CompiledBinding Liberate.Opacity}" Background="{CompiledBinding Liberate.BackgroundBrush}">
@@ -108,7 +110,7 @@
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
 
-				<controls:DataGridTemplateColumnExt MinWidth="80" Width="1*"  Header="Narrators" CanUserSort="True" SortMemberPath="Narrators" ClipboardContentBinding="{Binding Narrators}">
+				<controls:DataGridTemplateColumnExt Header="Narrators" MinWidth="10" Width="{Binding NarratorsWidth, Mode=TwoWay}" CanUserSort="True" SortMemberPath="Narrators" ClipboardContentBinding="{Binding Narrators}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Panel Opacity="{CompiledBinding Liberate.Opacity}" Background="{CompiledBinding Liberate.BackgroundBrush}">
@@ -118,7 +120,7 @@
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
 
-				<controls:DataGridTemplateColumnExt Width="90"  Header="Length" CanUserSort="True" SortMemberPath="Length" ClipboardContentBinding="{Binding Length}">
+				<controls:DataGridTemplateColumnExt Header="Length" MinWidth="10" Width="{Binding LengthWidth, Mode=TwoWay}" CanUserSort="True" SortMemberPath="Length" ClipboardContentBinding="{Binding Length}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Panel Opacity="{CompiledBinding Liberate.Opacity}" Background="{CompiledBinding Liberate.BackgroundBrush}">
@@ -128,7 +130,7 @@
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
 
-				<controls:DataGridTemplateColumnExt MinWidth="80" Width="1*" Header="Series" CanUserSort="True" SortMemberPath="Series" ClipboardContentBinding="{Binding Series}">
+				<controls:DataGridTemplateColumnExt Header="Series" MinWidth="10" Width="{Binding SeriesWidth, Mode=TwoWay}" CanUserSort="True" SortMemberPath="Series" ClipboardContentBinding="{Binding Series}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Panel Opacity="{CompiledBinding Liberate.Opacity}" Background="{CompiledBinding Liberate.BackgroundBrush}">
@@ -138,7 +140,7 @@
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
 
-				<controls:DataGridTemplateColumnExt Width="Auto" Header="Series&#xA;Order" CanUserSort="True" SortMemberPath="SeriesOrder" ClipboardContentBinding="{Binding Series}">
+				<controls:DataGridTemplateColumnExt Header="Series&#xA;Order" MinWidth="10" Width="{Binding SeriesOrderWidth, Mode=TwoWay}" CanUserSort="True" SortMemberPath="SeriesOrder" ClipboardContentBinding="{Binding Series}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Panel Opacity="{CompiledBinding Liberate.Opacity}" Background="{CompiledBinding Liberate.BackgroundBrush}">
@@ -148,7 +150,7 @@
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
 
-				<controls:DataGridTemplateColumnExt MinWidth="100" Width="1*" Header="Description" CanUserSort="True" SortMemberPath="Description" ClipboardContentBinding="{Binding LongDescription}">
+				<controls:DataGridTemplateColumnExt Header="Description" MinWidth="10" Width="{Binding DescriptionWidth, Mode=TwoWay}" CanUserSort="True" SortMemberPath="Description" ClipboardContentBinding="{Binding Description}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Panel Opacity="{CompiledBinding Liberate.Opacity}" Background="{CompiledBinding Liberate.BackgroundBrush}" Tapped="Description_Click" ToolTip.Tip="Click to see full description" >
@@ -158,7 +160,7 @@
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
 
-				<controls:DataGridTemplateColumnExt Width="100" Header="Category" CanUserSort="True" SortMemberPath="Category" ClipboardContentBinding="{Binding Category}">
+				<controls:DataGridTemplateColumnExt Header="Category" MinWidth="10" Width="{Binding CategoryWidth, Mode=TwoWay}" CanUserSort="True" SortMemberPath="Category" ClipboardContentBinding="{Binding Category}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Panel Opacity="{CompiledBinding Liberate.Opacity}" Background="{CompiledBinding Liberate.BackgroundBrush}">
@@ -172,14 +174,14 @@
 					x:DataType="uibase:IGridEntry"
 					Header="Product&#xA;Rating"
 					IsReadOnly="true"
-					Width="115"
+					MinWidth="10" Width="{Binding ProductRatingWidth, Mode=TwoWay}"
 					SortMemberPath="ProductRating" CanUserSort="True"
 					OpacityBinding="{CompiledBinding Liberate.Opacity}"
 					BackgroundBinding="{CompiledBinding Liberate.BackgroundBrush}"
 					ClipboardContentBinding="{CompiledBinding ProductRating}"
 					Binding="{CompiledBinding ProductRating}" />
 
-				<controls:DataGridTemplateColumnExt Width="90" Header="Purchase&#xA;Date" CanUserSort="True" SortMemberPath="PurchaseDate" ClipboardContentBinding="{Binding PurchaseDate}">
+				<controls:DataGridTemplateColumnExt Header="Purchase&#xA;Date" MinWidth="10" Width="{Binding PurchaseDateWidth, Mode=TwoWay}" CanUserSort="True" SortMemberPath="PurchaseDate" ClipboardContentBinding="{Binding PurchaseDate}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Panel Opacity="{CompiledBinding Liberate.Opacity}" Background="{CompiledBinding Liberate.BackgroundBrush}">
@@ -191,16 +193,16 @@
 
 				<controls:DataGridMyRatingColumn
 					x:DataType="uibase:IGridEntry"
-					Header="My Rating"					
+					Header="My Rating"
 					IsReadOnly="false"
-					Width="115"
+					MinWidth="10" Width="{Binding MyRatingWidth, Mode=TwoWay}"
 					SortMemberPath="MyRating" CanUserSort="True"
 					OpacityBinding="{CompiledBinding Liberate.Opacity}"
 					BackgroundBinding="{CompiledBinding Liberate.BackgroundBrush}"
 					ClipboardContentBinding="{CompiledBinding MyRating}"					
 					Binding="{CompiledBinding MyRating, Mode=TwoWay}" />
 
-				<controls:DataGridTemplateColumnExt Width="135" Header="Misc" CanUserSort="True" SortMemberPath="Misc" ClipboardContentBinding="{Binding Misc}">
+				<controls:DataGridTemplateColumnExt Header="Misc" MinWidth="10" Width="{Binding MiscWidth, Mode=TwoWay}" CanUserSort="True" SortMemberPath="Misc" ClipboardContentBinding="{Binding Misc}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Panel Opacity="{CompiledBinding Liberate.Opacity}" Background="{CompiledBinding Liberate.BackgroundBrush}">
@@ -210,7 +212,7 @@
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
 				
-				<controls:DataGridTemplateColumnExt Width="102" Header="Last&#xA;Download" CanUserSort="True" SortMemberPath="LastDownload" ClipboardContentBinding="{Binding LastDownload}">
+				<controls:DataGridTemplateColumnExt Header="Last&#xA;Download" MinWidth="10" Width="{Binding LastDownloadWidth, Mode=TwoWay}" CanUserSort="True" SortMemberPath="LastDownload" ClipboardContentBinding="{Binding LastDownload}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Panel Opacity="{CompiledBinding Liberate.Opacity}" Background="{CompiledBinding Liberate.BackgroundBrush}" ToolTip.Tip="{CompiledBinding LastDownload.ToolTipText}" DoubleTapped="Version_DoubleClick">
@@ -220,7 +222,7 @@
 					</DataGridTemplateColumn.CellTemplate>
 				</controls:DataGridTemplateColumnExt>
 
-				<controls:DataGridTemplateColumnExt CanUserSort="True" Width="100" Header="Tags" SortMemberPath="BookTags" ClipboardContentBinding="{Binding BookTags}">
+				<controls:DataGridTemplateColumnExt Header="Tags" MinWidth="10" Width="{Binding BookTagsWidth, Mode=TwoWay}" CanUserSort="True" SortMemberPath="BookTags" ClipboardContentBinding="{Binding BookTags}">
 					<DataGridTemplateColumn.CellTemplate>
 						<DataTemplate x:DataType="uibase:IGridEntry">
 							<Button

Source/LibationAvalonia/Views/ProductsDisplay.axaml.cs

@@ -11,6 +11,7 @@ using LibationAvalonia.Dialogs;
 using LibationAvalonia.ViewModels;
 using LibationFileManager;
 using LibationUiBase.GridView;
+using ReactiveUI;
 using System;
 using System.Collections.Generic;
 using System.Linq;
@@ -172,126 +173,107 @@ namespace LibationAvalonia.Views
 
 		public void ProductsGrid_CellContextMenuStripNeeded(object sender, DataGridCellContextMenuStripNeededEventArgs args)
 		{
+			var entry = args.GridEntry;
+			var ctx = new GridContextMenu(entry, '_');
+
 			if (args.Column.SortMemberPath is not "Liberate" and not "Cover")
 			{
-				var menuItem = new MenuItem { Header = "_Copy Cell Contents" };
+				args.ContextMenuItems.Add(new MenuItem
-
+				{
-				menuItem.Click += async (s, e)
+					Header = ctx.CopyCellText,
-					=> await App.MainWindow.Clipboard.SetTextAsync(args.CellClipboardContents);
+					Command = ReactiveCommand.CreateFromTask(() => App.MainWindow.Clipboard.SetTextAsync(args.CellClipboardContents))
-
+				});
-				args.ContextMenuItems.Add(menuItem);
 				args.ContextMenuItems.Add(new Separator());
 			}
-			var entry = args.GridEntry;
 
 			#region Liberate all Episodes
 
 			if (entry.Liberate.IsSeries)
 			{
-				var liberateEpisodesMenuItem = new MenuItem()
+				args.ContextMenuItems.Add(new MenuItem()
 				{
-					Header = "_Liberate All Episodes",
+					Header = ctx.LiberateEpisodesText,
-					IsEnabled = ((ISeriesEntry)entry).Children.Any(c => c.Liberate.BookStatus is LiberatedStatus.NotLiberated or LiberatedStatus.PartialDownload)
+					IsEnabled = ctx.LiberateEpisodesEnabled,
-				};
+					Command = ReactiveCommand.Create(() => LiberateSeriesClicked?.Invoke(this, (ISeriesEntry)entry))
-
+				});
-				args.ContextMenuItems.Add(liberateEpisodesMenuItem);
-
-				liberateEpisodesMenuItem.Click += (_, _) => LiberateSeriesClicked?.Invoke(this, ((ISeriesEntry)entry));
 			}
 
 			#endregion
 			#region Set Download status to Downloaded
 
-			var setDownloadMenuItem = new MenuItem()
+			args.ContextMenuItems.Add(new MenuItem()
 			{
-				Header = "Set Download status to '_Downloaded'",
+				Header = ctx.SetDownloadedText,
-				IsEnabled = entry.Book.UserDefinedItem.BookStatus != LiberatedStatus.Liberated || entry.Liberate.IsSeries
+				IsEnabled = ctx.SetDownloadedEnabled,
-			};
+				Command = ReactiveCommand.Create(ctx.SetDownloaded)
-
+			});
-			args.ContextMenuItems.Add(setDownloadMenuItem);
-
-			if (entry.Liberate.IsSeries)
-				setDownloadMenuItem.Click += (_, __) => ((ISeriesEntry)entry).Children.Select(c => c.LibraryBook).UpdateBookStatus(LiberatedStatus.Liberated);
-			else
-				setDownloadMenuItem.Click += (_, __) => entry.LibraryBook.UpdateBookStatus(LiberatedStatus.Liberated);
 
 			#endregion
 			#region Set Download status to Not Downloaded
 
-			var setNotDownloadMenuItem = new MenuItem()
+			args.ContextMenuItems.Add(new MenuItem()
 			{
-				Header = "Set Download status to '_Not Downloaded'",
+				Header = ctx.SetNotDownloadedText,
-				IsEnabled = entry.Book.UserDefinedItem.BookStatus != LiberatedStatus.NotLiberated || entry.Liberate.IsSeries
+				IsEnabled = ctx.SetNotDownloadedEnabled,
-			};
+				Command = ReactiveCommand.Create(ctx.SetNotDownloaded)
-
+			});
-			args.ContextMenuItems.Add(setNotDownloadMenuItem);
-
-			if (entry.Liberate.IsSeries)
-				setNotDownloadMenuItem.Click += (_, __) => ((ISeriesEntry)entry).Children.Select(c => c.LibraryBook).UpdateBookStatus(LiberatedStatus.NotLiberated);
-			else
-				setNotDownloadMenuItem.Click += (_, __) => entry.LibraryBook.UpdateBookStatus(LiberatedStatus.NotLiberated);
 
 			#endregion
 			#region Remove from library
 
-			var removeMenuItem = new MenuItem() { Header = "_Remove from library" };
+			args.ContextMenuItems.Add(new MenuItem
-
+			{
-			args.ContextMenuItems.Add(removeMenuItem);
+				Header = ctx.RemoveText,
-
+				Command = ReactiveCommand.CreateFromTask(ctx.RemoveAsync)
-			if (entry.Liberate.IsSeries)
+			});
-				removeMenuItem.Click += async (_, __) => await ((ISeriesEntry)entry).Children.Select(c => c.LibraryBook).RemoveBooksAsync();
-			else
-				removeMenuItem.Click += async (_, __) => await Task.Run(entry.LibraryBook.RemoveBook);
 
 			#endregion
 
 			if (!entry.Liberate.IsSeries)
 			{
 				#region Locate file
-				var locateFileMenuItem = new MenuItem() { Header = "_Locate file..." };
 
-				args.ContextMenuItems.Add(locateFileMenuItem);
+				args.ContextMenuItems.Add(new MenuItem
-
-				locateFileMenuItem.Click += async (_, __) =>
 				{
-					try
+					Header = ctx.LocateFileText,
+					Command = ReactiveCommand.CreateFromTask(async () =>
 					{
-						var window = this.GetParentWindow();
+						try
-
-						var openFileDialogOptions = new FilePickerOpenOptions
 						{
-							Title = $"Locate the audio file for '{entry.Book.TitleWithSubtitle}'",
+							var window = this.GetParentWindow();
-							AllowMultiple = false,
+
-							SuggestedStartLocation = await window.StorageProvider.TryGetFolderFromPathAsync(Configuration.Instance.Books.PathWithoutPrefix),
+							var openFileDialogOptions = new FilePickerOpenOptions
-							FileTypeFilter = new FilePickerFileType[]
 							{
-								new("All files (*.*)") { Patterns = new[] { "*" } },
+								Title = ctx.LocateFileDialogTitle,
-							}
+								AllowMultiple = false,
-						};
+								SuggestedStartLocation = await window.StorageProvider.TryGetFolderFromPathAsync(Configuration.Instance.Books.PathWithoutPrefix),
+								FileTypeFilter = new FilePickerFileType[]
+								{
+									new("All files (*.*)") { Patterns = new[] { "*" } },
+								}
+							};
 
-						var selectedFiles = await window.StorageProvider.OpenFilePickerAsync(openFileDialogOptions);
+							var selectedFiles = await window.StorageProvider.OpenFilePickerAsync(openFileDialogOptions);
-						var selectedFile = selectedFiles.SingleOrDefault()?.TryGetLocalPath();
+							var selectedFile = selectedFiles.SingleOrDefault()?.TryGetLocalPath();
 
-						if (selectedFile is not null)
+							if (selectedFile is not null)
-							FilePathCache.Insert(entry.AudibleProductId, selectedFile);
+								FilePathCache.Insert(entry.AudibleProductId, selectedFile);
-					}
+						}
-					catch (Exception ex)
+						catch (Exception ex)
-					{
+						{
-						var msg = "Error saving book's location";
+							await MessageBox.ShowAdminAlert(null, ctx.LocateFileErrorMessage, ctx.LocateFileErrorMessage, ex);
-						await MessageBox.ShowAdminAlert(null, msg, msg, ex);
+						}
-					}
+					})
-				};
+				});
 
 				#endregion
 				#region Convert to Mp3
-				var convertToMp3MenuItem = new MenuItem
+				args.ContextMenuItems.Add(new MenuItem
 				{
-					Header = "_Convert to Mp3",
+					Header = ctx.ConvertToMp3Text,
-					IsEnabled = entry.Book.UserDefinedItem.BookStatus is LiberatedStatus.Liberated
+					IsEnabled = ctx.ConvertToMp3Enabled,
-				};
+					Command = ReactiveCommand.Create(() => ConvertToMp3Clicked?.Invoke(this, entry.LibraryBook))
-				args.ContextMenuItems.Add(convertToMp3MenuItem);
+				});
-
-				convertToMp3MenuItem.Click += (_, _) => ConvertToMp3Clicked?.Invoke(this, entry.LibraryBook);
 
 				#endregion
 			}
@@ -299,34 +281,72 @@ namespace LibationAvalonia.Views
 			#region Force Re-Download
 			if (!entry.Liberate.IsSeries)
 			{
-				var reDownloadMenuItem = new MenuItem()
+				args.ContextMenuItems.Add(new MenuItem()
 				{
-					Header = "Re-download this audiobook",
+					Header = ctx.ReDownloadText,
-					IsEnabled = entry.Book.UserDefinedItem.BookStatus is LiberatedStatus.Liberated
+					IsEnabled = ctx.ReDownloadEnabled,
-				};
+					Command = ReactiveCommand.Create(() =>
-
+					{
-				args.ContextMenuItems.Add(reDownloadMenuItem);
+						//No need to persist this change. It only needs to last long for the file to start downloading
-				reDownloadMenuItem.Click += (s, _) =>
+						entry.Book.UserDefinedItem.BookStatus = LiberatedStatus.NotLiberated;
-				{
+						LiberateClicked?.Invoke(this, entry.LibraryBook);
-					//No need to persist this change. It only needs to last long for the file to start downloading
+					})
-					entry.Book.UserDefinedItem.BookStatus = LiberatedStatus.NotLiberated;
+				});
-					LiberateClicked?.Invoke(s, entry.LibraryBook);
-				};
 			}
 			#endregion
 
 			args.ContextMenuItems.Add(new Separator());
 
+			#region Edit Templates
+			async Task editTemplate<T>(LibraryBook libraryBook, string existingTemplate, Action<string> setNewTemplate)
+				where T : Templates, LibationFileManager.ITemplate, new()
+			{
+				var template = ctx.CreateTemplateEditor<T>(libraryBook, existingTemplate);
+				var form = new EditTemplateDialog(template);
+				if (await form.ShowDialog<DialogResult>(this.GetParentWindow()) == DialogResult.OK)
+				{
+					setNewTemplate(template.EditingTemplate.TemplateText);
+				}
+			}
+
+			if (!entry.Liberate.IsSeries)
+			{
+				args.ContextMenuItems.Add(new MenuItem
+				{
+					Header = ctx.EditTemplatesText,
+					ItemsSource = new[]
+					{
+						new MenuItem
+						{
+							Header = ctx.FolderTemplateText,
+							Command = ReactiveCommand.CreateFromTask(() => editTemplate<Templates.FolderTemplate>(entry.LibraryBook, Configuration.Instance.FolderTemplate, t => Configuration.Instance.FolderTemplate = t))
+						},
+						new MenuItem
+						{
+							Header = ctx.FileTemplateText,
+							Command = ReactiveCommand.CreateFromTask(() => editTemplate<Templates.FileTemplate>(entry.LibraryBook, Configuration.Instance.FileTemplate, t => Configuration.Instance.FileTemplate = t))
+						},
+						new MenuItem
+						{
+							Header = ctx.MultipartTemplateText,
+							Command = ReactiveCommand.CreateFromTask(() => editTemplate<Templates.ChapterFileTemplate>(entry.LibraryBook, Configuration.Instance.ChapterFileTemplate, t => Configuration.Instance.ChapterFileTemplate = t))
+						}
+					}
+				});
+				args.ContextMenuItems.Add(new Separator());
+			}
+
+			#endregion
+
 			#region View Bookmarks/Clips
 
 			if (!entry.Liberate.IsSeries)
 			{
-
+				args.ContextMenuItems.Add(new MenuItem
-				var bookRecordMenuItem = new MenuItem { Header = "View _Bookmarks/Clips" };
+				{
-
+					Header = ctx.ViewBookmarksText,
-				args.ContextMenuItems.Add(bookRecordMenuItem);
+					Command = ReactiveCommand.CreateFromTask(() => new BookRecordsDialog(entry.LibraryBook).ShowDialog(VisualRoot as Window))
-
+				});
-				bookRecordMenuItem.Click += async (_, _) => await new BookRecordsDialog(entry.LibraryBook).ShowDialog(VisualRoot as Window);
 			}
 
 			#endregion
@@ -334,12 +354,11 @@ namespace LibationAvalonia.Views
 
 			if (entry.Book.SeriesLink.Any())
 			{
-				var header = entry.Liberate.IsSeries ? "View All Episodes in Series" : "View All Books in Series";
+				args.ContextMenuItems.Add(new MenuItem
-				var viewSeriesMenuItem = new MenuItem { Header = header };
+				{
-
+					Header = ctx.ViewSeriesText,
-				args.ContextMenuItems.Add(viewSeriesMenuItem);
+					Command = ReactiveCommand.Create(() => new SeriesViewDialog(entry.LibraryBook).Show())
-
+				});
-				viewSeriesMenuItem.Click += (_, _) => new SeriesViewDialog(entry.LibraryBook).Show();
 			}
 
 			#endregion
@@ -536,7 +555,7 @@ namespace LibationAvalonia.Views
 				var displayWindow = new DescriptionDisplayDialog
 				{
 					SpawnLocation = new Point(pt.X, pt.Y),
-					DescriptionText = gEntry.LongDescription,
+					DescriptionText = gEntry.Description,
 				};
 
 				void CloseWindow(object o, DataGridRowEventArgs e)

Source/LibationAvalonia/Walkthrough.cs

@@ -3,7 +3,6 @@ using AudibleUtilities;
 using Avalonia.Controls;
 using Avalonia.Controls.Presenters;
 using Avalonia.Controls.Primitives;
-using Avalonia.Interactivity;
 using Avalonia.Media;
 using Avalonia.Styling;
 using Dinah.Core.StepRunner;
@@ -13,7 +12,6 @@ using LibationFileManager;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
-using static Avalonia.Threading.Dispatcher;
 
 namespace LibationAvalonia
 {
@@ -36,12 +34,13 @@ namespace LibationAvalonia
 			AutoScan = Configuration.Instance.AutoScan;
 			Configuration.Instance.AutoScan = false;
 			MainForm = mainForm;
-			sequence[nameof(ShowAccountDialog)] = () => UIThread.InvokeAsync(ShowAccountDialog);
+			var uiDispatcher = Avalonia.Threading.Dispatcher.UIThread;
-			sequence[nameof(ShowSettingsDialog)] = () => UIThread.InvokeAsync(ShowSettingsDialog);
+			sequence[nameof(ShowAccountDialog)] = () => uiDispatcher.InvokeAsync(ShowAccountDialog);
-			sequence[nameof(ShowAccountScanning)] = () => UIThread.InvokeAsync(ShowAccountScanning);
+			sequence[nameof(ShowSettingsDialog)] = () => uiDispatcher.InvokeAsync(ShowSettingsDialog);
-			sequence[nameof(ShowSearching)] = () => UIThread.InvokeAsync(ShowSearching);
+			sequence[nameof(ShowAccountScanning)] = () => uiDispatcher.InvokeAsync(ShowAccountScanning);
-			sequence[nameof(ShowQuickFilters)] = () => UIThread.InvokeAsync(ShowQuickFilters);
+			sequence[nameof(ShowSearching)] = () => uiDispatcher.InvokeAsync(ShowSearching);
-			sequence[nameof(ShowTourComplete)] = () => UIThread.InvokeAsync(ShowTourComplete);
+			sequence[nameof(ShowQuickFilters)] = () => uiDispatcher.InvokeAsync(ShowQuickFilters);
+			sequence[nameof(ShowTourComplete)] = () => uiDispatcher.InvokeAsync(ShowTourComplete);
 		}
 
 		public async Task RunAsync()
@@ -60,7 +59,7 @@ namespace LibationAvalonia
 			await displayControlAsync(MainForm.accountsToolStripMenuItem);
 
 			var accountSettings = new AccountsDialog();
-			accountSettings.Loaded += async (_, _) => await MessageBox.Show(accountSettings, "Add your Audible account(s), then save.", "Add an Account");
+			accountSettings.Opened += async (_, _) => await MessageBox.Show(accountSettings, "Add your Audible account(s), then save.", "Add an Account");
 			await accountSettings.ShowDialog(MainForm);
 			return true;
 		}
@@ -74,14 +73,14 @@ namespace LibationAvalonia
 			await displayControlAsync(MainForm.settingsToolStripMenuItem);
 			await displayControlAsync(MainForm.basicSettingsToolStripMenuItem);
 
-			var settingsDialog = await UIThread.InvokeAsync(() => new SettingsDialog());
+			var settingsDialog = new SettingsDialog();
 
 			var tabsToVisit = settingsDialog.tabControl.Items.OfType<TabItem>().ToList();
 
 			foreach (var tab in tabsToVisit)
 				tab.PropertyChanged += TabControl_PropertyChanged;
 
-			settingsDialog.Loaded += SettingsDialog_Loaded;
+			settingsDialog.Opened += SettingsDialog_Opened;
 			settingsDialog.Closing += SettingsDialog_FormClosing;
 			settingsDialog.saveBtn.Content = "Next Tab";
 
@@ -103,7 +102,7 @@ namespace LibationAvalonia
 				settingTabMessages.Remove(header.Text);
 			}
 
-			async void SettingsDialog_Loaded(object sender, RoutedEventArgs e)
+			async void SettingsDialog_Opened(object sender, System.EventArgs e)
 			{
 				await ShowTabPageMessageBoxAsync(tabsToVisit[0]);
 			}
@@ -227,7 +226,7 @@ namespace LibationAvalonia
 			await displayControlAsync(editQuickFiltersToolStripMenuItem);
 
 			var editQuickFilters = new EditQuickFilters();
-			editQuickFilters.Loaded += async (_, _) => await MessageBox.Show(editQuickFilters, "From here you can edit, delete, and change the order of Quick Filters", "Editing Quick Filters");
+			editQuickFilters.Opened += async (_, _) => await MessageBox.Show(editQuickFilters, "From here you can edit, delete, and change the order of Quick Filters", "Editing Quick Filters");
 			await editQuickFilters.ShowDialog(MainForm);
 
 			return true;
@@ -247,12 +246,12 @@ namespace LibationAvalonia
 
 		private async Task displayControlAsync(TemplatedControl control)
 		{
-			await UIThread.InvokeAsync(() => control.IsEnabled = false);
+			control.IsEnabled = false;
-			await UIThread.InvokeAsync(() => MainForm.productsDisplay.Focus());
+			MainForm.productsDisplay.Focus();
-			await UIThread.InvokeAsync(() => flashControlAsync(control));
+			await flashControlAsync(control);
-			if (control is MenuItem menuItem) await UIThread.InvokeAsync(menuItem.Open);
+			if (control is MenuItem menuItem) menuItem.Open();
 			await Task.Delay(500);
-			await UIThread.InvokeAsync(() => control.IsEnabled = true);
+			control.IsEnabled = true;
 		}
 
 		private static async Task flashControlAsync(TemplatedControl control, int flashCount = 3)

Source/LibationCli/LibationCli.csproj

@@ -3,7 +3,7 @@
 
 	<PropertyGroup>
 		<OutputType>Exe</OutputType>
-		<TargetFramework>net7.0-windows</TargetFramework>
+		<TargetFramework>net8.0-windows7.0</TargetFramework>
 		<RuntimeIdentifier>win-x64</RuntimeIdentifier>
 		<PublishReadyToRun>true</PublishReadyToRun>
 		<AppendTargetFrameworkToOutputPath>false</AppendTargetFrameworkToOutputPath>
@@ -11,6 +11,10 @@
 		<IsPublishable>True</IsPublishable>
 	</PropertyGroup>
 
+	<ItemGroup>
+		<RuntimeHostConfigurationOption Include="System.Net.DisableIPv6" Value="true" />
+	</ItemGroup>
+
 	<PropertyGroup>
 		<SatelliteResourceLanguages>en</SatelliteResourceLanguages>
 	</PropertyGroup>

Source/LibationCli/Properties/PublishProfiles/LinuxProfile.pubxml

@@ -8,7 +8,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <Platform>Any CPU</Platform>
     <PublishDir>..\bin\Publish\Linux-chardonnay</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <RuntimeIdentifier>linux-x64</RuntimeIdentifier>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>false</PublishSingleFile>

Source/LibationCli/Properties/PublishProfiles/MacOSProfile.pubxml

@@ -8,7 +8,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <Platform>Any CPU</Platform>
     <PublishDir>..\bin\Publish\MacOS-chardonnay</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <RuntimeIdentifier>osx-x64</RuntimeIdentifier>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>false</PublishSingleFile>

Source/LibationCli/Properties/PublishProfiles/WindowsProfile.pubxml

@@ -8,7 +8,7 @@ https://go.microsoft.com/fwlink/?LinkID=208121.
     <Platform>Any CPU</Platform>
     <PublishDir>..\bin\Publish\Windows-chardonnay</PublishDir>
     <PublishProtocol>FileSystem</PublishProtocol>
-    <TargetFramework>net7.0</TargetFramework>
+    <TargetFramework>net8.0</TargetFramework>
     <RuntimeIdentifier>win-x64</RuntimeIdentifier>
     <SelfContained>true</SelfContained>
     <PublishSingleFile>false</PublishSingleFile>

Source/LibationFileManager/AudibleFileStorage.cs

@@ -8,19 +8,21 @@ using Dinah.Core;
 using System.Threading.Tasks;
 using System.Threading;
 using FileManager;
+using AaxDecrypter;
 
+#nullable enable
 namespace LibationFileManager
 {
-    public abstract class AudibleFileStorage
+	public abstract class AudibleFileStorage
-    {
+	{
-        protected abstract LongPath GetFilePathCustom(string productId);
+		protected abstract LongPath? GetFilePathCustom(string productId);
-        protected abstract List<LongPath> GetFilePathsCustom(string productId);
+		protected abstract List<LongPath> GetFilePathsCustom(string productId);
 
-        #region static
+		#region static
-        public static LongPath DownloadsInProgressDirectory => Directory.CreateDirectory(Path.Combine(Configuration.Instance.InProgress, "DownloadsInProgress")).FullName;
+		public static LongPath DownloadsInProgressDirectory => Directory.CreateDirectory(Path.Combine(Configuration.Instance.InProgress, "DownloadsInProgress")).FullName;
-        public static LongPath DecryptInProgressDirectory => Directory.CreateDirectory(Path.Combine(Configuration.Instance.InProgress, "DecryptInProgress")).FullName;
+		public static LongPath DecryptInProgressDirectory => Directory.CreateDirectory(Path.Combine(Configuration.Instance.InProgress, "DecryptInProgress")).FullName;
 
-        static AudibleFileStorage()
+		static AudibleFileStorage()
 		{
 			//Clean up any partially-decrypted files from previous Libation instances.
 			//Do no clean DownloadsInProgressDirectory because those files are resumable
@@ -30,138 +32,164 @@ namespace LibationFileManager
 
 
 		private static AaxcFileStorage AAXC { get; } = new AaxcFileStorage();
-        public static bool AaxcExists(string productId) => AAXC.Exists(productId);
+		public static bool AaxcExists(string productId) => AAXC.Exists(productId);
 
-        public static AudioFileStorage Audio { get; } = new AudioFileStorage();
+		public static AudioFileStorage Audio { get; } = new AudioFileStorage();
 
-        public static LongPath BooksDirectory
+		public static LongPath BooksDirectory
-        {
+		{
-            get
+			get
-            {
+			{
-                if (string.IsNullOrWhiteSpace(Configuration.Instance.Books))
+				if (string.IsNullOrWhiteSpace(Configuration.Instance.Books))
-                    Configuration.Instance.Books = Path.Combine(Configuration.UserProfile, "Books");
+					Configuration.Instance.Books = Path.Combine(Configuration.UserProfile, "Books");
-                return Directory.CreateDirectory(Configuration.Instance.Books).FullName;
+				return Directory.CreateDirectory(Configuration.Instance.Books).FullName;
-            }
+			}
-        }
+		}
-        #endregion
+		#endregion
 
-        #region instance
+		#region instance
-        private FileType FileType { get; }
+		private FileType FileType { get; }
-        private string regexTemplate { get; }
+		private string regexTemplate { get; }
 
-        protected AudibleFileStorage(FileType fileType)
+		protected AudibleFileStorage(FileType fileType)
-        {
+		{
-            FileType = fileType;
+			FileType = fileType;
 
-            var extAggr = FileTypes.GetExtensions(FileType).Aggregate((a, b) => $"{a}|{b}");
+			var extAggr = FileTypes.GetExtensions(FileType).Aggregate((a, b) => $"{a}|{b}");
-            regexTemplate = $@"{{0}}.*?\.({extAggr})$";
+			regexTemplate = $@"{{0}}.*?\.({extAggr})$";
-        }
+		}
 
-        protected LongPath GetFilePath(string productId)
+		protected LongPath? GetFilePath(string productId)
-        {
+		{
-            // primary lookup
+			// primary lookup
-            var cachedFile = FilePathCache.GetFirstPath(productId, FileType);
+			var cachedFile = FilePathCache.GetFirstPath(productId, FileType);
-            if (cachedFile is not null && File.Exists(cachedFile))
+			if (cachedFile is not null && File.Exists(cachedFile))
-                return cachedFile;
+				return cachedFile;
 
-            // secondary lookup attempt
+			// secondary lookup attempt
-            var firstOrNull = GetFilePathCustom(productId);
+			var firstOrNull = GetFilePathCustom(productId);
-            if (firstOrNull is not null)
+			if (firstOrNull is not null)
-                FilePathCache.Insert(productId, firstOrNull);
+				FilePathCache.Insert(productId, firstOrNull);
 
-            return firstOrNull;
+			return firstOrNull;
-        }
+		}
 
-        public List<LongPath> GetPaths(string productId)
+		public List<LongPath> GetPaths(string productId)
-            => GetFilePathsCustom(productId);
+			=> GetFilePathsCustom(productId);
 
-        protected Regex GetBookSearchRegex(string productId)
+		protected Regex GetBookSearchRegex(string productId)
-        {
+		{
-            var pattern = string.Format(regexTemplate, productId);
+			var pattern = string.Format(regexTemplate, productId);
-            return new Regex(pattern, RegexOptions.IgnoreCase);
+			return new Regex(pattern, RegexOptions.IgnoreCase);
-        }
+		}
-        #endregion
+		#endregion
-    }
+	}
 
-    internal class AaxcFileStorage : AudibleFileStorage
+	internal class AaxcFileStorage : AudibleFileStorage
-    {
+	{
-        internal AaxcFileStorage() : base(FileType.AAXC) { }
+		internal AaxcFileStorage() : base(FileType.AAXC) { }
 
-        protected override LongPath GetFilePathCustom(string productId)
+		protected override LongPath? GetFilePathCustom(string productId)
-            => GetFilePathsCustom(productId).FirstOrDefault();
+			=> GetFilePathsCustom(productId).FirstOrDefault();
 
-        protected override List<LongPath> GetFilePathsCustom(string productId)
+		protected override List<LongPath> GetFilePathsCustom(string productId)
-        {
+		{
-            var regex = GetBookSearchRegex(productId);
+			var regex = GetBookSearchRegex(productId);
-            return FileUtility
+			return FileUtility
-                .SaferEnumerateFiles(DownloadsInProgressDirectory, "*.*", SearchOption.AllDirectories)
+				.SaferEnumerateFiles(DownloadsInProgressDirectory, "*.*", SearchOption.AllDirectories)
-                .Where(s => regex.IsMatch(s)).ToList();
+				.Where(s => regex.IsMatch(s)).ToList();
-        }
+		}
 
-        public bool Exists(string productId) => GetFilePath(productId) is not null;
+		public bool Exists(string productId) => GetFilePath(productId) is not null;
-    }
+	}
 
-    public class AudioFileStorage : AudibleFileStorage
+	public class AudioFileStorage : AudibleFileStorage
-    {
+	{
-        internal AudioFileStorage() : base(FileType.Audio)
+		internal AudioFileStorage() : base(FileType.Audio)
-            => BookDirectoryFiles ??= new BackgroundFileSystem(BooksDirectory, "*.*", SearchOption.AllDirectories);
+			=> BookDirectoryFiles ??= newBookDirectoryFiles();
 
-        private static BackgroundFileSystem BookDirectoryFiles { get; set; }
+		private static BackgroundFileSystem? BookDirectoryFiles { get; set; }
-        private static object bookDirectoryFilesLocker { get; } = new();
+		private static object bookDirectoryFilesLocker { get; } = new();
 		private static EnumerationOptions enumerationOptions { get; } = new()
 		{
 			RecurseSubdirectories = true,
 			IgnoreInaccessible = true,
-			MatchCasing = MatchCasing.CaseInsensitive
+			AttributesToSkip = FileAttributes.Hidden,
 		};
 
-		protected override LongPath GetFilePathCustom(string productId)
+		protected override LongPath? GetFilePathCustom(string productId)
-            => GetFilePathsCustom(productId).FirstOrDefault();
+			=> GetFilePathsCustom(productId).FirstOrDefault();
 
-        protected override List<LongPath> GetFilePathsCustom(string productId)
+		private static BackgroundFileSystem newBookDirectoryFiles()
-        {
+			=> new BackgroundFileSystem(BooksDirectory, "*.*", SearchOption.AllDirectories);
-            // If user changed the BooksDirectory: reinitialize
-            lock (bookDirectoryFilesLocker)
-                if (BooksDirectory != BookDirectoryFiles.RootDirectory)
-                    BookDirectoryFiles = new BackgroundFileSystem(BooksDirectory, "*.*", SearchOption.AllDirectories);
 
-            var regex = GetBookSearchRegex(productId);
+		protected override List<LongPath> GetFilePathsCustom(string productId)
+		{
+			// If user changed the BooksDirectory: reinitialize
+			lock (bookDirectoryFilesLocker)
+				if (BooksDirectory != BookDirectoryFiles?.RootDirectory)
+					BookDirectoryFiles = newBookDirectoryFiles();
+
+			var regex = GetBookSearchRegex(productId);
 
 			//Find all extant files matching the productId
 			//using both the file system and the file path cache
 			return
 				FilePathCache
-                .GetFiles(productId)
+				.GetFiles(productId)
-                .Where(c => c.fileType == FileType.Audio && File.Exists(c.path))
+				.Where(c => c.fileType == FileType.Audio && File.Exists(c.path))
-                .Select(c => c.path)
+				.Select(c => c.path)
-                .Union(BookDirectoryFiles.FindFiles(regex))
+				.Union(BookDirectoryFiles.FindFiles(regex))
-                .ToList();
+				.ToList();
-        }
+		}
 
-        public void Refresh() => BookDirectoryFiles.RefreshFiles();
+		public void Refresh()
+		{
+			if (BookDirectoryFiles is null)
+				lock (bookDirectoryFilesLocker)
+					BookDirectoryFiles = newBookDirectoryFiles();
+			else
+				BookDirectoryFiles?.RefreshFiles();
+		}
 
-        public LongPath GetPath(string productId) => GetFilePath(productId);
+		public LongPath? GetPath(string productId) => GetFilePath(productId);
 
 		public static async IAsyncEnumerable<FilePathCache.CacheEntry> FindAudiobooksAsync(LongPath searchDirectory, [EnumeratorCancellation] CancellationToken cancellationToken)
 		{
 			ArgumentValidator.EnsureNotNull(searchDirectory, nameof(searchDirectory));
 
-			foreach (LongPath path in Directory.EnumerateFiles(searchDirectory, "*.M4B", enumerationOptions))
+			foreach (LongPath path in Directory.EnumerateFiles(searchDirectory, "*.*", enumerationOptions))
 			{
 				if (cancellationToken.IsCancellationRequested)
 					yield break;
 
-				FilePathCache.CacheEntry audioFile = default;
+				if (getFormatByExtension(path) is not OutputFormat format)
+					continue;
+
+				FilePathCache.CacheEntry? audioFile = default;
 
 				try
 				{
-					using var fileStream = File.OpenRead(path);
+					if (format is OutputFormat.M4b)
+					{
+						var tags = await Task.Run(() => AAXClean.AppleTags.FromFile(path));
 
-					var mp4File = await Task.Run(() => new AAXClean.Mp4File(fileStream), cancellationToken);
+						if (tags?.Asin is not null)
+							audioFile = new FilePathCache.CacheEntry(tags.Asin, FileType.Audio, path);
+					}
+					else
+					{
+						using var fileStream = File.OpenRead(path);
+						var id3 = await Task.Run(() => NAudio.Lame.ID3.Id3Tag.Create(fileStream));
 
-					if (mp4File?.AppleTags?.Asin is not null)
+						var asin = id3?.Children
-						audioFile = new FilePathCache.CacheEntry(mp4File.AppleTags.Asin, FileType.Audio, path);
+							.OfType<NAudio.Lame.ID3.TXXXFrame>()
+							.FirstOrDefault(f => f.FieldName == "AUDIBLE_ASIN")
+							?.FieldValue;
 
+						if (!string.IsNullOrWhiteSpace(asin))
+							audioFile = new FilePathCache.CacheEntry(asin, FileType.Audio, path);
+					}
 				}
 				catch (Exception ex)
 				{
@@ -175,6 +203,15 @@ namespace LibationFileManager
 				if (audioFile is not null)
 					yield return audioFile;
 			}
+
+			static OutputFormat? getFormatByExtension(string path)
+			{
+				var ext = Path.GetExtension(path).ToLower();
+
+				return ext == ".mp3" ? OutputFormat.Mp3
+					: ext == ".m4b" ? OutputFormat.M4b
+					: null;
+			}
 		}
 	}
 }