Merge 5866d953f8 into 16509be56c

Closes #292

.github/FUNDING.yml

@@ -1,3 +1 @@
-github: chylex
-patreon: chylex
 ko_fi: chylex

README.md

@@ -16,10 +16,9 @@ Fork the repository and clone it to your computer (if you've never used git, you
 
 Folder organization:
 * `app/` contains a Visual Studio solution for the desktop app
-* `lib/` contains utilities required to build the project
 * `web/` contains source code of the [official website](https://dht.chylex.com), which can be used as a template when making your own website
 
-To start editing source code for the desktop app, install the [.NET 8 SDK](https://dotnet.microsoft.com/en-us/download/dotnet/8.0), and then open `app/DiscordHistoryTracker.sln` in [Visual Studio](https://visualstudio.microsoft.com/downloads/) or [Rider](https://www.jetbrains.com/rider/).
+To start editing source code for the desktop app, install the [.NET 9 SDK](https://dotnet.microsoft.com/en-us/download/dotnet/9.0), and then open `app/DiscordHistoryTracker.sln` in [Visual Studio](https://visualstudio.microsoft.com/downloads/) or [Rider](https://www.jetbrains.com/rider/).
 
 ### Building
 
@@ -29,27 +28,18 @@ To build a `Release` version of the desktop app, follow the instructions for you
 
 #### Release – Windows (64-bit)
 
-1. Install [Python 3](https://www.python.org/downloads), and ensure the `python` executable is in your `PATH`
-2. Install [Powershell 5](https://docs.microsoft.com/en-us/powershell/scripting/install/installing-powershell-on-windows) or newer (on Windows 10, the included version of Powershell should be enough)
+1. Install Debian in WSL and open a terminal in the project folder.
+2. Run the `app/build.wsl.sh` script.
+3. Read the [Distribution](#distribution) section below.
 
-The `lib/` folder contains an installation of [Node](https://nodejs.org/en) and [uglify-js](https://www.npmjs.com/package/uglify-js), which are used to minify the tracking script. This installation will only work on 64-bit Windows; building on 32-bit Windows is not supported, but you can try.
-
-Run the `app/build.bat` script, and read the [Distribution](#distribution) section below.
+Note: The build script expects `dotnet.exe` to be installed in `C:\Program Files\dotnet`.
 
 #### Release – Other Operating Systems
 
-1. Install [Python 3](https://www.python.org/downloads), and ensure the `python` executable exists and launches Python 3
-   - On Debian and derivatives, you can install `python-is-python3`
-   - On other distributions, you can create a link manually, for ex. `ln -s /usr/bin/python3 /usr/bin/python`
-   - If you don't want `python` to mean Python 3, then edit `Desktop.csproj` and change `python` to `python3`
-2. Install [Node + npm](https://nodejs.org/en)
-3. Install [uglify-js](https://www.npmjs.com/package/uglify-js) globally (`npm install -g uglify-js`)
-4. Install the `zip` package from your repository
-
-Run the `app/build.sh` script, and read the [Distribution](#distribution) section below.
+1. Install the `zip` package from your repository.
+2. Run the `app/build.sh` script.
+3. Read the [Distribution](#distribution) section below.
 
 #### Distribution
 
-The mentioned build scripts will prepare `Release` builds ready for distribution. Once the script finishes, the `app/bin` folder will contain self-contained executables for each major operating system, and a portable version that works on all other systems but requires .NET 8 to be installed.
-
-Note that when building on Windows, the generated `.zip` files for Linux and Mac will not have correct file permissions, so it will not be possible to run them by double-clicking `DiscordHistoryTracker`. I tried using Python to re-create the archives with correct file permissions, but found that Linux `zip` tools could not see them. The only working solution is building the Windows + portable version on Windows, and Linux + Mac version on Linux.
+The mentioned build scripts will prepare `Release` builds ready for distribution. Once the script finishes, the `app/bin` folder will contain self-contained executables for each major operating system, and a portable version that works on all other systems but requires the ASP.NET Core Runtime to be installed.

app/.editorconfig

@@ -0,0 +1,2 @@
+[*.cs]
+propertychanged.auto_notify = false

app/.idea/.idea.DiscordHistoryTracker/.idea/avalonia.xml

@@ -0,0 +1,29 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="AvaloniaProject">
+    <option name="projectPerEditor">
+      <map>
+        <entry key="Desktop/App.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Dialogs/CheckBox/CheckBoxDialog.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Dialogs/Message/MessageDialog.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Dialogs/Progress/ProgressDialog.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Dialogs/TextBox/TextBoxDialog.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/AboutWindow.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Controls/DownloadItemFilterPanel.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Controls/MessageFilterPanel.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Controls/ServerConfigurationPanel.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Controls/StatusBar.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Dialogs/NewDatabaseSettingsDialog.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/MainWindow.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Pages/AdvancedPage.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Pages/DatabasePage.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Pages/DebugPage.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Pages/DownloadsPage.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Pages/TrackingPage.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Pages/ViewerPage.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Screens/MainContentScreen.axaml" value="Desktop/Desktop.csproj" />
+        <entry key="Desktop/Main/Screens/WelcomeScreen.axaml" value="Desktop/Desktop.csproj" />
+      </map>
+    </option>
+  </component>
+</project>

app/.idea/.idea.DiscordHistoryTracker/.idea/codeStyles/Project.xml

@@ -13,10 +13,10 @@
     <CssCodeStyleSettings>
       <option name="HEX_COLOR_LOWER_CASE" value="true" />
     </CssCodeStyleSettings>
-    <DB2CodeStyleSettings version="6">
+    <DB2CodeStyleSettings version="7">
       <option name="USE_GENERIC_STYLE" value="true" />
     </DB2CodeStyleSettings>
-    <DerbyCodeStyleSettings version="6">
+    <DerbyCodeStyleSettings version="7">
       <option name="USE_GENERIC_STYLE" value="true" />
     </DerbyCodeStyleSettings>
     <GoCodeStyleSettings>
@@ -26,13 +26,10 @@
       <option name="WRAP_FUNC_PARAMS" value="5" />
       <option name="WRAP_FUNC_RESULT" value="5" />
     </GoCodeStyleSettings>
-    <H2CodeStyleSettings version="6">
+    <H2CodeStyleSettings version="7">
       <option name="USE_GENERIC_STYLE" value="true" />
     </H2CodeStyleSettings>
-    <H2CodeStyleSettings version="6">
-      <option name="USE_GENERIC_STYLE" value="true" />
-    </H2CodeStyleSettings>
-    <HSQLCodeStyleSettings version="6">
+    <HSQLCodeStyleSettings version="7">
       <option name="USE_GENERIC_STYLE" value="true" />
     </HSQLCodeStyleSettings>
     <HTMLCodeStyleSettings>
@@ -88,10 +85,10 @@
     <LessCodeStyleSettings>
       <option name="HEX_COLOR_LOWER_CASE" value="true" />
     </LessCodeStyleSettings>
-    <MSSQLCodeStyleSettings version="6">
+    <MSSQLCodeStyleSettings version="7">
       <option name="USE_GENERIC_STYLE" value="true" />
     </MSSQLCodeStyleSettings>
-    <MySQLCodeStyleSettings version="6">
+    <MySQLCodeStyleSettings version="7">
       <option name="USE_GENERIC_STYLE" value="true" />
     </MySQLCodeStyleSettings>
     <Objective-C>
@@ -101,7 +98,7 @@
       <option name="SPACE_BEFORE_INIT_LIST" value="true" />
       <option name="SPACE_AFTER_DICTIONARY_LITERAL_COLON" value="false" />
     </Objective-C>
-    <OracleCodeStyleSettings version="6">
+    <OracleCodeStyleSettings version="7">
       <option name="USE_GENERIC_STYLE" value="true" />
     </OracleCodeStyleSettings>
     <PHPCodeStyleSettings>
@@ -119,7 +116,7 @@
       <option name="NEW_LINE_AFTER_PHP_OPENING_TAG" value="true" />
       <option name="SPACE_AROUND_ASSIGNMENT_IN_DECLARE" value="true" />
     </PHPCodeStyleSettings>
-    <PostgresCodeStyleSettings version="6">
+    <PostgresCodeStyleSettings version="7">
       <option name="USE_GENERIC_STYLE" value="true" />
     </PostgresCodeStyleSettings>
     <Properties>
@@ -146,13 +143,16 @@
       <option name="INDENT_WHEN_CASES" value="true" />
       <option name="CHAIN_CALLS_ALIGNMENT" value="2" />
     </Ruby>
-    <SQLiteCodeStyleSettings version="6">
+    <SQLiteCodeStyleSettings version="7">
       <option name="USE_GENERIC_STYLE" value="true" />
     </SQLiteCodeStyleSettings>
     <ScssCodeStyleSettings>
       <option name="HEX_COLOR_LOWER_CASE" value="true" />
     </ScssCodeStyleSettings>
-    <SqlCodeStyleSettings version="6">
+    <Shell_Script>
+      <option name="KEEP_COLUMN_ALIGNMENT_PADDING" value="true" />
+    </Shell_Script>
+    <SqlCodeStyleSettings version="7">
       <option name="KEYWORD_CASE" value="2" />
       <option name="TYPE_CASE" value="2" />
       <option name="CUSTOM_TYPE_CASE" value="2" />
@@ -176,9 +176,10 @@
       <option name="CONSTRAINT_WRAP_3" value="true" />
       <option name="CONSTRAINT_WRAP_4" value="true" />
       <option name="VIEW_INDENT_QUERY" value="true" />
+      <option name="IMP_LOOP_LOOP_INDENT" value="false" />
       <option name="EXPR_CASE_WHEN_WRAP" value="false" />
     </SqlCodeStyleSettings>
-    <SybaseCodeStyleSettings version="6">
+    <SybaseCodeStyleSettings version="7">
       <option name="USE_GENERIC_STYLE" value="true" />
     </SybaseCodeStyleSettings>
     <TypeScriptCodeStyleSettings version="0">
@@ -206,6 +207,11 @@
         <option name="KEEP_INDENTS_ON_EMPTY_LINES" value="true" />
       </indentOptions>
     </codeStyleSettings>
+    <codeStyleSettings language="Gherkin">
+      <indentOptions>
+        <option name="KEEP_INDENTS_ON_EMPTY_LINES" value="true" />
+      </indentOptions>
+    </codeStyleSettings>
     <codeStyleSettings language="Groovy">
       <option name="ELSE_ON_NEW_LINE" value="true" />
       <option name="SPACE_WITHIN_ARRAY_INITIALIZER_BRACES" value="true" />
@@ -285,6 +291,13 @@
         <option name="KEEP_INDENTS_ON_EMPTY_LINES" value="true" />
       </indentOptions>
     </codeStyleSettings>
+    <codeStyleSettings language="Markdown">
+      <indentOptions>
+        <option name="INDENT_SIZE" value="2" />
+        <option name="CONTINUATION_INDENT_SIZE" value="2" />
+        <option name="TAB_SIZE" value="2" />
+      </indentOptions>
+    </codeStyleSettings>
     <codeStyleSettings language="ObjectiveC">
       <option name="LINE_COMMENT_AT_FIRST_COLUMN" value="false" />
       <option name="BLOCK_COMMENT_AT_FIRST_COLUMN" value="false" />
@@ -345,7 +358,6 @@
       </indentOptions>
     </codeStyleSettings>
     <codeStyleSettings language="Rust">
-      <option name="RIGHT_MARGIN" value="140" />
       <option name="ALIGN_MULTILINE_CHAINED_METHODS" value="true" />
       <indentOptions>
         <option name="USE_TAB_CHARACTER" value="true" />
@@ -360,6 +372,7 @@
     </codeStyleSettings>
     <codeStyleSettings language="SCSS">
       <indentOptions>
+        <option name="CONTINUATION_INDENT_SIZE" value="2" />
         <option name="KEEP_INDENTS_ON_EMPTY_LINES" value="true" />
       </indentOptions>
     </codeStyleSettings>
@@ -370,13 +383,6 @@
         <option name="KEEP_INDENTS_ON_EMPTY_LINES" value="true" />
       </indentOptions>
     </codeStyleSettings>
-    <codeStyleSettings language="Shell Script">
-      <indentOptions>
-        <option name="INDENT_SIZE" value="4" />
-        <option name="TAB_SIZE" value="4" />
-        <option name="USE_TAB_CHARACTER" value="true" />
-      </indentOptions>
-    </codeStyleSettings>
     <codeStyleSettings language="TOML">
       <indentOptions>
         <option name="CONTINUATION_INDENT_SIZE" value="4" />
@@ -430,6 +436,9 @@
     </codeStyleSettings>
     <codeStyleSettings language="liquid">
       <indentOptions>
+        <option name="INDENT_SIZE" value="2" />
+        <option name="CONTINUATION_INDENT_SIZE" value="2" />
+        <option name="TAB_SIZE" value="2" />
         <option name="KEEP_INDENTS_ON_EMPTY_LINES" value="true" />
       </indentOptions>
     </codeStyleSettings>
@@ -445,4 +454,4 @@
       </indentOptions>
     </codeStyleSettings>
   </code_scheme>
-</component>
+</component>

app/.idea/.idea.DiscordHistoryTracker/.idea/inspectionProfiles/Project.xml

@@ -91,7 +91,6 @@
     <inspection_tool class="ComparatorNotSerializable" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="CompareToUsesNonFinalVariable" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ComparisonOfShortAndChar" enabled="true" level="WARNING" enabled_by_default="true" />
-    <inspection_tool class="ComposeMissingKeys" enabled="true" level="ERROR" enabled_by_default="true" />
     <inspection_tool class="ConditionSignal" enabled="true" level="WARNING" enabled_by_default="true" />
     <inspection_tool class="ConditionalExpression" enabled="true" level="INFORMATION" enabled_by_default="true">
       <option name="ignoreSimpleAssignmentsAndReturns" value="true" />
@@ -362,7 +361,7 @@
     </inspection_tool>
     <inspection_tool class="LocalVariableDeclarationSideOnly" enabled="true" level="ERROR" enabled_by_default="true" />
     <inspection_tool class="LocalVariableNamingConventionJS" enabled="true" level="WARNING" enabled_by_default="true">
-      <option name="m_regex" value="[a-z][A-Za-z]*" />
+      <option name="m_regex" value="[a-z][A-Za-z0-9]*" />
       <option name="m_minLength" value="0" />
       <option name="m_maxLength" value="99" />
     </inspection_tool>

app/.idea/.idea.DiscordHistoryTracker/.idea/libraries/Generated_files.xml

@@ -1,22 +0,0 @@
-<component name="libraryTable">
-  <library name="Generated files" type="javaScript">
-    <properties>
-      <sourceFilesUrls>
-        <item url="file://$PROJECT_DIR$/Resources/Tracker/scripts.min/discord.js" />
-        <item url="file://$PROJECT_DIR$/Resources/Tracker/scripts.min/dom.js" />
-        <item url="file://$PROJECT_DIR$/Resources/Tracker/scripts.min/gui.js" />
-        <item url="file://$PROJECT_DIR$/Resources/Tracker/scripts.min/settings.js" />
-        <item url="file://$PROJECT_DIR$/Resources/Tracker/scripts.min/state.js" />
-      </sourceFilesUrls>
-    </properties>
-    <CLASSES>
-      <root url="file://$PROJECT_DIR$/Resources/Tracker/scripts.min/discord.js" />
-      <root url="file://$PROJECT_DIR$/Resources/Tracker/scripts.min/dom.js" />
-      <root url="file://$PROJECT_DIR$/Resources/Tracker/scripts.min/gui.js" />
-      <root url="file://$PROJECT_DIR$/Resources/Tracker/scripts.min/settings.js" />
-      <root url="file://$PROJECT_DIR$/Resources/Tracker/scripts.min/state.js" />
-    </CLASSES>
-    <JAVADOC />
-    <SOURCES />
-  </library>
-</component>

app/.idea/.idea.DiscordHistoryTracker/.idea/runConfigurations/Desktop.xml

@@ -1,8 +1,8 @@
 <component name="ProjectRunConfigurationManager">
   <configuration default="false" name="Desktop" type="DotNetProject" factoryName=".NET Project">
-    <option name="EXE_PATH" value="$PROJECT_DIR$/Desktop/bin/Debug/net5.0/DiscordHistoryTracker.exe" />
+    <option name="EXE_PATH" value="$PROJECT_DIR$/.artifacts/bin/Desktop/debug/DiscordHistoryTracker.exe" />
     <option name="PROGRAM_PARAMETERS" value="" />
-    <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/Desktop/bin/Debug/net5.0" />
+    <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/.artifacts/bin/Desktop/debug" />
     <option name="PASS_PARENT_ENVS" value="1" />
     <option name="USE_EXTERNAL_CONSOLE" value="0" />
     <option name="USE_MONO" value="0" />
@@ -12,7 +12,7 @@
     <option name="PROJECT_ARGUMENTS_TRACKING" value="1" />
     <option name="PROJECT_WORKING_DIRECTORY_TRACKING" value="1" />
     <option name="PROJECT_KIND" value="DotNetCore" />
-    <option name="PROJECT_TFM" value="net5.0" />
+    <option name="PROJECT_TFM" value="net8.0" />
     <method v="2">
       <option name="Build" />
     </method>

app/.idea/.idea.DiscordHistoryTracker/.idea/runConfigurations/Minify.xml

@@ -1,23 +0,0 @@
-<component name="ProjectRunConfigurationManager">
-  <configuration default="false" name="Minify" type="PythonConfigurationType" factoryName="Python">
-    <module name="rider.module" />
-    <option name="INTERPRETER_OPTIONS" value="" />
-    <option name="PARENT_ENVS" value="true" />
-    <envs>
-      <env name="PYTHONUNBUFFERED" value="1" />
-    </envs>
-    <option name="SDK_HOME" value="" />
-    <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$" />
-    <option name="IS_MODULE_SDK" value="false" />
-    <option name="ADD_CONTENT_ROOTS" value="false" />
-    <option name="ADD_SOURCE_ROOTS" value="false" />
-    <option name="SCRIPT_NAME" value="$PROJECT_DIR$/minify.py" />
-    <option name="PARAMETERS" value="" />
-    <option name="SHOW_COMMAND_LINE" value="false" />
-    <option name="EMULATE_TERMINAL" value="false" />
-    <option name="MODULE_MODE" value="false" />
-    <option name="REDIRECT_INPUT" value="false" />
-    <option name="INPUT_FILE" value="" />
-    <method v="2" />
-  </configuration>
-</component>

app/Desktop/App.axaml

@@ -1,8 +1,9 @@
 <Application xmlns="https://github.com/avaloniaui"
              xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
+             xmlns:common="clr-namespace:DHT.Desktop.Common"
              xmlns:system="clr-namespace:System;assembly=System.Runtime"
-             xmlns:common="clr-namespace:DHT.Desktop.App.Common"
-             x:Class="DHT.Desktop.App.App">
+             x:Class="DHT.Desktop.App"
+             RequestedThemeVariant="Light">
 
     <Application.Styles>
 
@@ -50,9 +51,56 @@
 
         <Style Selector="Expander">
             <Setter Property="MinHeight" Value="40" />
+            <Setter Property="Padding" Value="12" />
             <Setter Property="HorizontalAlignment" Value="Stretch" />
         </Style>
-        
+
+        <Style Selector="TreeViewItem:not(:empty) /template/ Panel#PART_ExpandCollapseChevronContainer">
+            <Setter Property="Cursor" Value="Hand" />
+            <Setter Property="Margin" Value="0 0 5 0" />
+        </Style>
+        <Style Selector="TreeViewItem:empty /template/ Panel#PART_ExpandCollapseChevronContainer">
+            <Setter Property="Margin" Value="10 0" />
+        </Style>
+        <Style Selector="TreeViewItem[Level=0]:empty /template/ Panel#PART_ExpandCollapseChevronContainer">
+            <Setter Property="Margin" Value="0" />
+            <Setter Property="Width" Value="0" />
+        </Style>
+        <Style Selector="TreeViewItem /template/ ToggleButton#PART_ExpandCollapseChevron">
+            <Setter Property="Width" Value="18" />
+            <Setter Property="Height" Value="32" />
+        </Style>
+        <Style Selector="TreeViewItem /template/ ToggleButton#PART_ExpandCollapseChevron > Border">
+            <Setter Property="Padding" Value="2 10 3 10" />
+        </Style>
+
+        <Style Selector="TreeView.noSelection">
+            <Style Selector="^ TreeViewItem /template/ Border#PART_LayoutRoot">
+                <Setter Property="Background" Value="{DynamicResource TreeViewItemBackground}" />
+                <Setter Property="BorderBrush" Value="{DynamicResource TreeViewItemBorderBrush}" />
+            </Style>
+            <Style Selector="^ TreeViewItem /template/ Border#PART_LayoutRoot > ContentPresenter#PART_HeaderPresenter">
+                <Setter Property="Foreground" Value="{DynamicResource TreeViewItemForeground}" />
+            </Style>
+            <Style Selector="^ TreeViewItem:disabled /template/ Border#PART_LayoutRoot">
+                <Setter Property="Background" Value="{DynamicResource TreeViewItemBackgroundDisabled}" />
+                <Setter Property="BorderBrush" Value="{DynamicResource TreeViewItemBorderBrushDisabled}" />
+            </Style>
+            <Style Selector="^ TreeViewItem:disabled /template/ Border#PART_LayoutRoot > ContentPresenter#PART_HeaderPresenter">
+                <Setter Property="Foreground" Value="{DynamicResource TreeViewItemForegroundDisabled}" />
+            </Style>
+        </Style>
+
+        <Style Selector="Panel.buttons">
+            <Setter Property="Margin" Value="0 20 0 0" />
+        </Style>
+        <Style Selector="Panel.buttons > WrapPanel">
+            <Setter Property="ItemSpacing" Value="8" />
+        </Style>
+        <Style Selector="Panel.buttons Button">
+            <Setter Property="MinWidth" Value="80" />
+        </Style>
+
     </Application.Styles>
 
     <Application.Resources>
@@ -106,7 +154,7 @@
         <SolidColorBrush x:Key="TextControlPlaceholderForegroundPointerOver" Color="#AAAAAA" />
         <SolidColorBrush x:Key="TextControlPlaceholderForegroundFocused" Color="#AAAAAA" />
         <SolidColorBrush x:Key="TextControlPlaceholderForegroundDisabled" Color="#AAAAAA" />
-        
+
         <Thickness x:Key="ExpanderHeaderPadding">15,0</Thickness>
         <Thickness x:Key="ExpanderContentPadding">12</Thickness>
         <SolidColorBrush x:Key="ExpanderHeaderBorderBrush" Color="#697DAB" />

app/Desktop/App.axaml.cs

@@ -1,21 +1,20 @@
-using System;
 using Avalonia;
 using Avalonia.Controls.ApplicationLifetimes;
 using Avalonia.Markup.Xaml;
-using DHT.Desktop.App.Windows;
+using DHT.Desktop.Main;
 
-namespace DHT.Desktop.App;
+namespace DHT.Desktop;
 
 sealed class App : Application {
 	public override void Initialize() {
 		AvaloniaXamlLoader.Load(this);
 	}
-
+	
 	public override void OnFrameworkInitializationCompleted() {
 		if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop) {
-			desktop.MainWindow = new MainWindow(new Arguments(desktop.Args ?? Array.Empty<string>()));
+			desktop.MainWindow = new MainWindow(Program.Arguments);
 		}
-
+		
 		base.OnFrameworkInitializationCompleted();
 	}
 }

app/Desktop/App/Controls/ServerConfigurationPanelModel.cs

@@ -1,116 +0,0 @@
-using System;
-using Avalonia.Controls;
-using DHT.Desktop.App.Dialogs.Message;
-using DHT.Desktop.Server;
-using DHT.Server.Database;
-using DHT.Server.Service;
-using DHT.Utils.Models;
-
-namespace DHT.Desktop.App.Controls;
-
-sealed class ServerConfigurationPanelModel : BaseModel, IDisposable {
-	private string inputPort;
-
-	public string InputPort {
-		get => inputPort;
-		set {
-			Change(ref inputPort, value);
-			OnPropertyChanged(nameof(HasMadeChanges));
-		}
-	}
-
-	private string inputToken;
-
-	public string InputToken {
-		get => inputToken;
-		set {
-			Change(ref inputToken, value);
-			OnPropertyChanged(nameof(HasMadeChanges));
-		}
-	}
-
-	public bool HasMadeChanges => ServerManager.Port.ToString() != InputPort || ServerManager.Token != InputToken;
-
-	private bool isToggleServerButtonEnabled = true;
-
-	public bool IsToggleServerButtonEnabled {
-		get => isToggleServerButtonEnabled;
-		set => Change(ref isToggleServerButtonEnabled, value);
-	}
-
-	public string ToggleServerButtonText => serverManager.IsRunning ? "Stop Server" : "Start Server";
-
-	public event EventHandler<StatusBarModel.Status>? ServerStatusChanged;
-
-	private readonly Window window;
-	private readonly ServerManager serverManager;
-
-	[Obsolete("Designer")]
-	public ServerConfigurationPanelModel() : this(null!, new ServerManager(DummyDatabaseFile.Instance)) {}
-
-	public ServerConfigurationPanelModel(Window window, ServerManager serverManager) {
-		this.window = window;
-		this.serverManager = serverManager;
-		this.inputPort = ServerManager.Port.ToString();
-		this.inputToken = ServerManager.Token;
-	}
-
-	public void Initialize() {
-		ServerLauncher.ServerStatusChanged += ServerLauncherOnServerStatusChanged;
-	}
-
-	public void Dispose() {
-		ServerLauncher.ServerStatusChanged -= ServerLauncherOnServerStatusChanged;
-	}
-
-	private void ServerLauncherOnServerStatusChanged(object? sender, EventArgs e) {
-		ServerStatusChanged?.Invoke(this, serverManager.IsRunning ? StatusBarModel.Status.Ready : StatusBarModel.Status.Stopped);
-		OnPropertyChanged(nameof(ToggleServerButtonText));
-		IsToggleServerButtonEnabled = true;
-	}
-
-	private void BeforeServerStart() {
-		IsToggleServerButtonEnabled = false;
-		ServerStatusChanged?.Invoke(this, StatusBarModel.Status.Starting);
-	}
-
-	private void StartServer() {
-		BeforeServerStart();
-		serverManager.Launch();
-	}
-
-	private void StopServer() {
-		IsToggleServerButtonEnabled = false;
-		ServerStatusChanged?.Invoke(this, StatusBarModel.Status.Stopping);
-		serverManager.Stop();
-	}
-
-	public void OnClickToggleServerButton() {
-		if (serverManager.IsRunning) {
-			StopServer();
-		}
-		else {
-			StartServer();
-		}
-	}
-
-	public void OnClickRandomizeToken() {
-		InputToken = ServerUtils.GenerateRandomToken(20);
-	}
-
-	public async void OnClickApplyChanges() {
-		if (!ushort.TryParse(InputPort, out ushort port)) {
-			await Dialog.ShowOk(window, "Invalid Port", "Port must be a number between 0 and 65535.");
-			return;
-		}
-
-		BeforeServerStart();
-		serverManager.Relaunch(port, InputToken);
-		OnPropertyChanged(nameof(HasMadeChanges));
-	}
-
-	public void OnClickCancelChanges() {
-		InputPort = ServerManager.Port.ToString();
-		InputToken = ServerManager.Token;
-	}
-}

app/Desktop/App/Controls/StatusBarModel.cs

@@ -1,34 +0,0 @@
-using DHT.Utils.Models;
-
-namespace DHT.Desktop.App.Controls;
-
-sealed class StatusBarModel : BaseModel {
-	private Status status = Status.Stopped;
-
-	public Status CurrentStatus {
-		get => status;
-		set {
-			status = value;
-			OnPropertyChanged(nameof(StatusText));
-		}
-	}
-
-	public string StatusText {
-		get {
-			return CurrentStatus switch {
-				Status.Starting => "STARTING",
-				Status.Ready    => "READY",
-				Status.Stopping => "STOPPING",
-				Status.Stopped  => "STOPPED",
-				_               => ""
-			};
-		}
-	}
-
-	public enum Status {
-		Starting,
-		Ready,
-		Stopping,
-		Stopped
-	}
-}

app/Desktop/App/Dialogs/CheckBox/CheckBoxDialog.axaml

@@ -1,61 +0,0 @@
-<Window xmlns="https://github.com/avaloniaui"
-        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"
-        xmlns:checkBox="clr-namespace:DHT.Desktop.App.Dialogs.CheckBox"
-        mc:Ignorable="d" d:DesignWidth="500"
-        x:Class="DHT.Desktop.App.Dialogs.CheckBox.CheckBoxDialog"
-        Title="{Binding Title}"
-        Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
-        Width="500" SizeToContent="Height" CanResize="False"
-        WindowStartupLocation="CenterOwner">
-
-    <Window.DataContext>
-        <checkBox:CheckBoxDialogModel />
-    </Window.DataContext>
-
-    <Window.Styles>
-        <Style Selector="Panel.buttons">
-            <Setter Property="Margin" Value="0 20 0 0" />
-        </Style>
-        <Style Selector="Panel.buttons > WrapPanel.right">
-            <Setter Property="HorizontalAlignment" Value="Right" />
-        </Style>
-        <Style Selector="Panel.buttons Button">
-            <Setter Property="MinWidth" Value="80" />
-        </Style>
-        <Style Selector="Panel.buttons > WrapPanel.left Button">
-            <Setter Property="Margin" Value="0 0 8 0" />
-        </Style>
-        <Style Selector="Panel.buttons > WrapPanel.right Button">
-            <Setter Property="Margin" Value="8 0 0 0" />
-        </Style>
-    </Window.Styles>
-
-    <StackPanel Margin="20">
-        <ScrollViewer MaxHeight="400">
-            <ItemsRepeater ItemsSource="{Binding Items}">
-                <ItemsRepeater.ItemTemplate>
-                    <DataTemplate>
-                        <CheckBox IsChecked="{Binding Checked}">
-                            <Label>
-                                <TextBlock Text="{Binding Title}" TextWrapping="Wrap" />
-                            </Label>
-                        </CheckBox>
-                    </DataTemplate>
-                </ItemsRepeater.ItemTemplate>
-            </ItemsRepeater>
-        </ScrollViewer>
-        <Panel Classes="buttons">
-            <WrapPanel Classes="left">
-                <Button Command="{Binding SelectAll}" IsEnabled="{Binding !AreAllSelected}">Select All</Button>
-                <Button Command="{Binding SelectNone}" IsEnabled="{Binding !AreNoneSelected}">Select None</Button>
-            </WrapPanel>
-            <WrapPanel Classes="right">
-                <Button Click="ClickOk">OK</Button>
-                <Button Click="ClickCancel">Cancel</Button>
-            </WrapPanel>
-        </Panel>
-    </StackPanel>
-
-</Window>

app/Desktop/App/Dialogs/CheckBox/CheckBoxDialog.axaml.cs

@@ -1,21 +0,0 @@
-using System.Diagnostics.CodeAnalysis;
-using Avalonia.Controls;
-using Avalonia.Interactivity;
-using DHT.Desktop.App.Dialogs.Message;
-
-namespace DHT.Desktop.App.Dialogs.CheckBox;
-
-[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-public sealed partial class CheckBoxDialog : Window {
-	public CheckBoxDialog() {
-		InitializeComponent();
-	}
-
-	public void ClickOk(object? sender, RoutedEventArgs e) {
-		Close(DialogResult.OkCancel.Ok);
-	}
-
-	public void ClickCancel(object? sender, RoutedEventArgs e) {
-		Close(DialogResult.OkCancel.Cancel);
-	}
-}

app/Desktop/App/Dialogs/CheckBox/CheckBoxDialogModel.cs

@@ -1,70 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Linq;
-using DHT.Utils.Models;
-
-namespace DHT.Desktop.App.Dialogs.CheckBox;
-
-class CheckBoxDialogModel : BaseModel {
-	public string Title { get; init; } = "";
-
-	private IReadOnlyList<CheckBoxItem> items = Array.Empty<CheckBoxItem>();
-
-	public IReadOnlyList<CheckBoxItem> Items {
-		get => items;
-
-		protected set {
-			foreach (var item in items) {
-				item.PropertyChanged -= OnItemPropertyChanged;
-			}
-
-			items = value;
-
-			foreach (var item in items) {
-				item.PropertyChanged += OnItemPropertyChanged;
-			}
-		}
-	}
-
-	private bool pauseCheckEvents = false;
-
-	public bool AreAllSelected => Items.All(static item => item.Checked);
-	public bool AreNoneSelected => Items.All(static item => !item.Checked);
-
-	public void SelectAll() => SetAllChecked(true);
-	public void SelectNone() => SetAllChecked(false);
-
-	private void SetAllChecked(bool isChecked) {
-		pauseCheckEvents = true;
-
-		foreach (var item in Items) {
-			item.Checked = isChecked;
-		}
-
-		pauseCheckEvents = false;
-		UpdateBulkButtons();
-	}
-
-	private void UpdateBulkButtons() {
-		OnPropertyChanged(nameof(AreAllSelected));
-		OnPropertyChanged(nameof(AreNoneSelected));
-	}
-
-	private void OnItemPropertyChanged(object? sender, PropertyChangedEventArgs e) {
-		if (!pauseCheckEvents && e.PropertyName == nameof(CheckBoxItem.Checked)) {
-			UpdateBulkButtons();
-		}
-	}
-}
-
-sealed class CheckBoxDialogModel<T> : CheckBoxDialogModel {
-	public new IReadOnlyList<CheckBoxItem<T>> Items { get; }
-
-	public IEnumerable<CheckBoxItem<T>> SelectedItems => Items.Where(static item => item.Checked);
-
-	public CheckBoxDialogModel(IEnumerable<CheckBoxItem<T>> items) {
-		this.Items = new List<CheckBoxItem<T>>(items);
-		base.Items = this.Items;
-	}
-}

app/Desktop/App/Dialogs/CheckBox/CheckBoxItem.cs

@@ -1,24 +0,0 @@
-using DHT.Utils.Models;
-
-namespace DHT.Desktop.App.Dialogs.CheckBox;
-
-class CheckBoxItem : BaseModel {
-	public string Title { get; init; } = "";
-	public object? Item { get; init; } = null;
-
-	private bool isChecked = false;
-
-	public bool Checked {
-		get => isChecked;
-		set => Change(ref isChecked, value);
-	}
-}
-
-sealed class CheckBoxItem<T> : CheckBoxItem {
-	public new T Item { get; }
-
-	public CheckBoxItem(T item) {
-		this.Item = item;
-		base.Item = item;
-	}
-}

app/Desktop/App/Dialogs/Message/MessageDialog.axaml

@@ -1,42 +0,0 @@
-<Window xmlns="https://github.com/avaloniaui"
-        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"
-        xmlns:message="clr-namespace:DHT.Desktop.App.Dialogs.Message"
-        mc:Ignorable="d" d:DesignWidth="500"
-        x:Class="DHT.Desktop.App.Dialogs.Message.MessageDialog"
-        Title="{Binding Title}"
-        Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
-        Width="500" SizeToContent="Height" CanResize="False"
-        WindowStartupLocation="CenterOwner">
-
-    <Window.DataContext>
-        <message:MessageDialogModel />
-    </Window.DataContext>
-
-    <Window.Styles>
-        <Style Selector="TextBlock">
-            <Setter Property="FontSize" Value="15" />
-            <Setter Property="TextWrapping" Value="Wrap" />
-        </Style>
-        <Style Selector="WrapPanel">
-            <Setter Property="HorizontalAlignment" Value="Right" />
-            <Setter Property="Margin" Value="0 8 0 0" />
-        </Style>
-        <Style Selector="Button">
-            <Setter Property="Margin" Value="8 0 0 0" />
-            <Setter Property="MinWidth" Value="80" />
-        </Style>
-    </Window.Styles>
-
-    <StackPanel Margin="20">
-        <TextBlock Text="{Binding Message}" />
-        <WrapPanel>
-            <Button Click="ClickOk" IsVisible="{Binding IsOkVisible}">OK</Button>
-            <Button Click="ClickYes" IsVisible="{Binding IsYesVisible}">Yes</Button>
-            <Button Click="ClickNo" IsVisible="{Binding IsNoVisible}">No</Button>
-            <Button Click="ClickCancel" IsVisible="{Binding IsCancelVisible}">Cancel</Button>
-        </WrapPanel>
-    </StackPanel>
-
-</Window>

app/Desktop/App/Dialogs/Progress/IProgressCallback.cs

@@ -1,7 +0,0 @@
-using System.Threading.Tasks;
-
-namespace DHT.Desktop.App.Dialogs.Progress;
-
-interface IProgressCallback {
-	Task Update(string message, int finishedItems, int totalItems);
-}

app/Desktop/App/Dialogs/Progress/ProgressDialog.axaml.cs

@@ -1,30 +0,0 @@
-using System;
-using System.Diagnostics.CodeAnalysis;
-using System.Threading.Tasks;
-using Avalonia.Controls;
-
-namespace DHT.Desktop.App.Dialogs.Progress;
-
-[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-public sealed partial class ProgressDialog : Window {
-	private bool isFinished = false;
-
-	public ProgressDialog() {
-		InitializeComponent();
-	}
-
-	public void OnOpened(object? sender, EventArgs e) {
-		if (DataContext is ProgressDialogModel model) {
-			Task.Run(model.StartTask).ContinueWith(OnFinished, TaskScheduler.FromCurrentSynchronizationContext());
-		}
-	}
-
-	public void OnClosing(object? sender, WindowClosingEventArgs e) {
-		e.Cancel = !isFinished;
-	}
-
-	private void OnFinished(Task task) {
-		isFinished = true;
-		Close();
-	}
-}

app/Desktop/App/Dialogs/Progress/ProgressDialogModel.cs

@@ -1,65 +0,0 @@
-using System;
-using System.Threading.Tasks;
-using Avalonia.Threading;
-using DHT.Desktop.App.Common;
-using DHT.Utils.Models;
-
-namespace DHT.Desktop.App.Dialogs.Progress;
-
-sealed class ProgressDialogModel : BaseModel {
-	public string Title { get; init; } = "";
-
-	private string message = "";
-
-	public string Message {
-		get => message;
-		private set => Change(ref message, value);
-	}
-
-	private string items = "";
-
-	public string Items {
-		get => items;
-		private set => Change(ref items, value);
-	}
-
-	private int progress = 0;
-
-	public int Progress {
-		get => progress;
-		private set => Change(ref progress, value);
-	}
-
-	private readonly TaskRunner? task;
-
-	[Obsolete("Designer")]
-	public ProgressDialogModel() {}
-
-	public ProgressDialogModel(TaskRunner task) {
-		this.task = task;
-	}
-
-	internal async Task StartTask() {
-		if (task != null) {
-			await task(new Callback(this));
-		}
-	}
-
-	public delegate Task TaskRunner(IProgressCallback callback);
-
-	private sealed class Callback : IProgressCallback {
-		private readonly ProgressDialogModel model;
-
-		public Callback(ProgressDialogModel model) {
-			this.model = model;
-		}
-
-		async Task IProgressCallback.Update(string message, int finishedItems, int totalItems) {
-			await Dispatcher.UIThread.InvokeAsync(() => {
-				model.Message = message;
-				model.Items = finishedItems.Format() + " / " + totalItems.Format();
-				model.Progress = 100 * finishedItems / totalItems;
-			});
-		}
-	}
-}

app/Desktop/App/Pages/AdvancedPageModel.cs

@@ -1,39 +0,0 @@
-using System;
-using Avalonia.Controls;
-using DHT.Desktop.App.Controls;
-using DHT.Desktop.App.Dialogs.Message;
-using DHT.Desktop.Server;
-using DHT.Server.Database;
-using DHT.Utils.Models;
-
-namespace DHT.Desktop.App.Pages;
-
-sealed class AdvancedPageModel : BaseModel, IDisposable {
-	public ServerConfigurationPanelModel ServerConfigurationModel { get; }
-
-	private readonly Window window;
-	private readonly IDatabaseFile db;
-
-	[Obsolete("Designer")]
-	public AdvancedPageModel() : this(null!, DummyDatabaseFile.Instance, new ServerManager(DummyDatabaseFile.Instance)) {}
-
-	public AdvancedPageModel(Window window, IDatabaseFile db, ServerManager serverManager) {
-		this.window = window;
-		this.db = db;
-
-		ServerConfigurationModel = new ServerConfigurationPanelModel(window, serverManager);
-	}
-
-	public void Initialize() {
-		ServerConfigurationModel.Initialize();
-	}
-
-	public void Dispose() {
-		ServerConfigurationModel.Dispose();
-	}
-
-	public async void VacuumDatabase() {
-		db.Vacuum();
-		await Dialog.ShowOk(window, "Vacuum Database", "Done.");
-	}
-}

app/Desktop/App/Pages/DatabasePageModel.cs

@@ -1,59 +0,0 @@
-using System;
-using System.Diagnostics;
-using System.IO;
-using Avalonia.Controls;
-using DHT.Desktop.App.Dialogs.Message;
-using DHT.Server.Database;
-using DHT.Utils.Logging;
-using DHT.Utils.Models;
-
-namespace DHT.Desktop.App.Pages; 
-
-sealed class DatabasePageModel : BaseModel {
-	private static readonly Log Log = Log.ForType<DatabasePageModel>();
-
-	public IDatabaseFile Db { get; }
-
-	public event EventHandler? DatabaseClosed;
-
-	private readonly Window window;
-
-	[Obsolete("Designer")]
-	public DatabasePageModel() : this(null!, DummyDatabaseFile.Instance) {}
-
-	public DatabasePageModel(Window window, IDatabaseFile db) {
-		this.window = window;
-		this.Db = db;
-	}
-
-	public async void OpenDatabaseFolder() {
-		string file = Db.Path;
-		string? folder = Path.GetDirectoryName(file);
-
-		if (folder == null) {
-			return;
-		}
-
-		switch (Environment.OSVersion.Platform) {
-			case PlatformID.Win32NT:
-				Process.Start("explorer.exe", "/select,\"" + file + "\"");
-				break;
-
-			case PlatformID.Unix:
-				Process.Start("xdg-open", new string[] { folder });
-				break;
-
-			case PlatformID.MacOSX:
-				Process.Start("open", new string[] { folder });
-				break;
-
-			default:
-				await Dialog.ShowOk(window, "Feature Not Supported", "This feature is not supported for your operating system.");
-				break;
-		}
-	}
-
-	public void CloseDatabase() {
-		DatabaseClosed?.Invoke(this, EventArgs.Empty);
-	}
-}

app/Desktop/App/Pages/TrackingPage.axaml

@@ -1,26 +0,0 @@
-<UserControl xmlns="https://github.com/avaloniaui"
-             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"
-             xmlns:pages="clr-namespace:DHT.Desktop.App.Pages"
-             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="DHT.Desktop.App.Pages.TrackingPage">
-
-    <Design.DataContext>
-        <pages:TrackingPageModel />
-    </Design.DataContext>
-
-    <StackPanel Spacing="10">
-        <TextBlock TextWrapping="Wrap">
-            To start tracking messages, copy the tracking script and paste it into the console of either the Discord app, or your browser. The console is usually opened by pressing Ctrl+Shift+I.
-        </TextBlock>
-        <StackPanel DockPanel.Dock="Left" Orientation="Horizontal" Spacing="10">
-            <Button x:Name="CopyTrackingScript" Click="CopyTrackingScriptButton_OnClick">Copy Tracking Script</Button>
-        </StackPanel>
-        <TextBlock TextWrapping="Wrap" Margin="0 5 0 0">
-            By default, the Discord app does not allow opening the console. The button below will change a hidden setting in the Discord app that controls whether the Ctrl+Shift+I shortcut is enabled.
-        </TextBlock>
-        <Button DockPanel.Dock="Right" Command="{Binding OnClickToggleAppDevTools}" Content="{Binding ToggleAppDevToolsButtonText}" IsEnabled="{Binding IsToggleAppDevToolsButtonEnabled}" />
-    </StackPanel>
-
-</UserControl>

app/Desktop/App/Pages/TrackingPage.axaml.cs

@@ -1,32 +0,0 @@
-using System;
-using System.Diagnostics.CodeAnalysis;
-using System.Threading.Tasks;
-using Avalonia.Controls;
-using Avalonia.Interactivity;
-
-namespace DHT.Desktop.App.Pages;
-
-[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-public sealed partial class TrackingPage : UserControl {
-	private bool isCopyingScript;
-
-	public TrackingPage() {
-		InitializeComponent();
-	}
-
-	public async void CopyTrackingScriptButton_OnClick(object? sender, RoutedEventArgs e) {
-		if (DataContext is TrackingPageModel model) {
-			var originalText = CopyTrackingScript.Content;
-			CopyTrackingScript.MinWidth = CopyTrackingScript.Bounds.Width;
-
-			if (await model.OnClickCopyTrackingScript() && !isCopyingScript) {
-				isCopyingScript = true;
-				CopyTrackingScript.Content = "Script Copied!";
-
-				await Task.Delay(TimeSpan.FromSeconds(2));
-				CopyTrackingScript.Content = originalText;
-				isCopyingScript = false;
-			}
-		}
-	}
-}

app/Desktop/App/Pages/TrackingPageModel.cs

@@ -1,115 +0,0 @@
-using System;
-using System.Threading.Tasks;
-using System.Web;
-using Avalonia.Controls;
-using DHT.Desktop.App.Dialogs.Message;
-using DHT.Desktop.Discord;
-using DHT.Desktop.Server;
-using DHT.Utils.Models;
-
-namespace DHT.Desktop.App.Pages;
-
-sealed class TrackingPageModel : BaseModel {
-	private bool areDevToolsEnabled;
-
-	private bool AreDevToolsEnabled {
-		get => areDevToolsEnabled;
-		set {
-			Change(ref areDevToolsEnabled, value);
-			OnPropertyChanged(nameof(ToggleAppDevToolsButtonText));
-		}
-	}
-
-	public bool IsToggleAppDevToolsButtonEnabled { get; private set; } = true;
-
-	public string ToggleAppDevToolsButtonText {
-		get {
-			if (!IsToggleAppDevToolsButtonEnabled) {
-				return "Unavailable";
-			}
-
-			return AreDevToolsEnabled ? "Disable Ctrl+Shift+I" : "Enable Ctrl+Shift+I";
-		}
-	}
-
-	private readonly Window window;
-
-	[Obsolete("Designer")]
-	public TrackingPageModel() : this(null!) {}
-
-	public TrackingPageModel(Window window) {
-		this.window = window;
-	}
-
-	public async Task Initialize() {
-		bool? devToolsEnabled = await DiscordAppSettings.AreDevToolsEnabled();
-		if (devToolsEnabled.HasValue) {
-			AreDevToolsEnabled = devToolsEnabled.Value;
-		}
-		else {
-			IsToggleAppDevToolsButtonEnabled = false;
-			OnPropertyChanged(nameof(IsToggleAppDevToolsButtonEnabled));
-		}
-	}
-
-	public async Task<bool> OnClickCopyTrackingScript() {
-		string bootstrap = await Resources.ReadTextAsync("Tracker/bootstrap.js");
-		string script = bootstrap.Replace("= 0; /*[PORT]*/", "= " + ServerManager.Port + ";")
-		                         .Replace("/*[TOKEN]*/", HttpUtility.JavaScriptStringEncode(ServerManager.Token))
-		                         .Replace("/*[IMPORTS]*/", await Resources.ReadJoinedAsync("Tracker/scripts/", '\n'))
-		                         .Replace("/*[CSS-CONTROLLER]*/", await Resources.ReadTextAsync("Tracker/styles/controller.css"))
-		                         .Replace("/*[CSS-SETTINGS]*/", await Resources.ReadTextAsync("Tracker/styles/settings.css"));
-
-		var clipboard = window.Clipboard;
-		if (clipboard == null) {
-			await Dialog.ShowOk(window, "Copy Tracking Script", "Clipboard is not available on this system.");
-			return false;
-		}
-
-		try {
-			await clipboard.SetTextAsync(script);
-			return true;
-		} catch {
-			await Dialog.ShowOk(window, "Copy Tracking Script", "An error occurred while copying to clipboard.");
-			return false;
-		}
-	}
-
-	public async void OnClickToggleAppDevTools() {
-		const string DialogTitle = "Discord App Settings File";
-
-		bool oldState = AreDevToolsEnabled;
-		bool newState = !oldState;
-
-		switch (await DiscordAppSettings.ConfigureDevTools(newState)) {
-			case SettingsJsonResult.Success:
-				AreDevToolsEnabled = newState;
-				await Dialog.ShowOk(window, DialogTitle, "Ctrl+Shift+I was " + (newState ? "enabled." : "disabled.") + " Restart the Discord app for the change to take effect.");
-				break;
-
-			case SettingsJsonResult.AlreadySet:
-				await Dialog.ShowOk(window, DialogTitle, "Ctrl+Shift+I is already " + (newState ? "enabled." : "disabled."));
-				AreDevToolsEnabled = newState;
-				break;
-
-			case SettingsJsonResult.FileNotFound:
-				await Dialog.ShowOk(window, DialogTitle, "Cannot find the settings file:\n" + DiscordAppSettings.JsonFilePath);
-				break;
-
-			case SettingsJsonResult.ReadError:
-				await Dialog.ShowOk(window, DialogTitle, "Cannot read the settings file:\n" + DiscordAppSettings.JsonFilePath);
-				break;
-
-			case SettingsJsonResult.InvalidJson:
-				await Dialog.ShowOk(window, DialogTitle, "Unknown format of the settings file:\n" + DiscordAppSettings.JsonFilePath);
-				break;
-
-			case SettingsJsonResult.WriteError:
-				await Dialog.ShowOk(window, DialogTitle, "Cannot save the settings file:\n" + DiscordAppSettings.JsonFilePath);
-				break;
-
-			default:
-				throw new ArgumentOutOfRangeException();
-		}
-	}
-}

app/Desktop/App/Screens/MainContentScreenModel.cs

@@ -1,88 +0,0 @@
-using System;
-using System.Threading.Tasks;
-using Avalonia.Controls;
-using DHT.Desktop.App.Controls;
-using DHT.Desktop.App.Dialogs.Message;
-using DHT.Desktop.App.Pages;
-using DHT.Desktop.Server;
-using DHT.Server.Database;
-using DHT.Utils.Logging;
-
-namespace DHT.Desktop.App.Screens;
-
-sealed class MainContentScreenModel : IDisposable {
-	private static readonly Log Log = Log.ForType<MainContentScreenModel>();
-
-	public DatabasePage DatabasePage { get; }
-	private DatabasePageModel DatabasePageModel { get; }
-
-	public TrackingPage TrackingPage { get; }
-	private TrackingPageModel TrackingPageModel { get; }
-
-	public AdvancedPage AdvancedPage { get; }
-	private AdvancedPageModel AdvancedPageModel { get; }
-
-	public StatusBarModel StatusBarModel { get; }
-
-	public event EventHandler? DatabaseClosed {
-		add {
-			DatabasePageModel.DatabaseClosed += value;
-		}
-		remove {
-			DatabasePageModel.DatabaseClosed -= value;
-		}
-	}
-
-	private readonly Window window;
-	private readonly ServerManager serverManager;
-
-	[Obsolete("Designer")]
-	public MainContentScreenModel() : this(null!, DummyDatabaseFile.Instance) {}
-
-	public MainContentScreenModel(Window window, IDatabaseFile db) {
-		this.window = window;
-		this.serverManager = new ServerManager(db);
-
-		ServerLauncher.ServerManagementExceptionCaught += ServerLauncherOnServerManagementExceptionCaught;
-
-		DatabasePageModel = new DatabasePageModel(window, db);
-		DatabasePage = new DatabasePage { DataContext = DatabasePageModel };
-
-		TrackingPageModel = new TrackingPageModel(window);
-		TrackingPage = new TrackingPage { DataContext = TrackingPageModel };
-
-		AdvancedPageModel = new AdvancedPageModel(window, db, serverManager);
-		AdvancedPage = new AdvancedPage { DataContext = AdvancedPageModel };
-
-		StatusBarModel = new StatusBarModel();
-
-		AdvancedPageModel.ServerConfigurationModel.ServerStatusChanged += OnServerStatusChanged;
-		DatabaseClosed += OnDatabaseClosed;
-
-		StatusBarModel.CurrentStatus = serverManager.IsRunning ? StatusBarModel.Status.Ready : StatusBarModel.Status.Stopped;
-	}
-
-	public async Task Initialize() {
-		await TrackingPageModel.Initialize();
-		AdvancedPageModel.Initialize();
-		serverManager.Launch();
-	}
-
-	public void Dispose() {
-		ServerLauncher.ServerManagementExceptionCaught -= ServerLauncherOnServerManagementExceptionCaught;
-		serverManager.Dispose();
-	}
-
-	private void OnServerStatusChanged(object? sender, StatusBarModel.Status e) {
-		StatusBarModel.CurrentStatus = e;
-	}
-
-	private void OnDatabaseClosed(object? sender, EventArgs e) {
-		serverManager.Stop();
-	}
-
-	private async void ServerLauncherOnServerManagementExceptionCaught(object? sender, Exception ex) {
-		Log.Error(ex);
-		await Dialog.ShowOk(window, "Internal Server Error", ex.Message);
-	}
-}

app/Desktop/App/Screens/WelcomeScreen.axaml

@@ -1,40 +0,0 @@
-<UserControl xmlns="https://github.com/avaloniaui"
-             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"
-             xmlns:screens="clr-namespace:DHT.Desktop.App.Screens"
-             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="DHT.Desktop.App.Screens.WelcomeScreen">
-
-    <Design.DataContext>
-        <screens:WelcomeScreenModel />
-    </Design.DataContext>
-
-    <UserControl.Background>
-        <SolidColorBrush>#546A9F</SolidColorBrush>
-    </UserControl.Background>
-
-    <UserControl.Styles>
-        <Style Selector="Panel#RootPanel">
-            <Setter Property="Background" Value="#FFFFFF" />
-            <Setter Property="Margin" Value="20" />
-            <Setter Property="HorizontalAlignment" Value="Center" />
-            <Setter Property="VerticalAlignment" Value="Center" />
-        </Style>
-        <Style Selector="Button">
-            <Setter Property="Margin" Value="5 0" />
-        </Style>
-    </UserControl.Styles>
-
-    <Panel Name="RootPanel">
-        <StackPanel Margin="42">
-            <TextBlock Text="{Binding Version, StringFormat=Discord History Tracker v{0}}" FontSize="25" Margin="0 0 0 30" HorizontalAlignment="Center" />
-
-            <StackPanel Orientation="Horizontal" HorizontalAlignment="Center">
-                <Button Command="{Binding OpenOrCreateDatabase}">Open or Create Database</Button>
-                <Button Command="{Binding ShowAboutDialog}">About</Button>
-                <Button Command="{Binding Exit}">Exit</Button>
-            </StackPanel>
-        </StackPanel>
-    </Panel>
-</UserControl>

app/Desktop/App/Screens/WelcomeScreenModel.cs

@@ -1,71 +0,0 @@
-using System;
-using System.IO;
-using System.Threading.Tasks;
-using Avalonia.Controls;
-using DHT.Desktop.App.Common;
-using DHT.Desktop.App.Dialogs.Message;
-using DHT.Desktop.App.Windows;
-using DHT.Server.Database;
-using DHT.Utils.Models;
-
-namespace DHT.Desktop.App.Screens;
-
-sealed class WelcomeScreenModel : BaseModel, IDisposable {
-	public string Version => Program.Version;
-
-	public IDatabaseFile? Db { get; private set; }
-	public bool HasDatabase => Db != null;
-
-	private readonly Window window;
-
-	private string? dbFilePath;
-
-	[Obsolete("Designer")]
-	public WelcomeScreenModel() : this(null!) {}
-
-	public WelcomeScreenModel(Window window) {
-		this.window = window;
-	}
-
-	public async void OpenOrCreateDatabase() {
-		var path = await DatabaseGui.NewOpenOrCreateDatabaseFileDialog(window, Path.GetDirectoryName(dbFilePath));
-		if (path != null) {
-			await OpenOrCreateDatabaseFromPath(path);
-		}
-	}
-
-	public async Task OpenOrCreateDatabaseFromPath(string path) {
-		if (Db != null) {
-			Db = null;
-		}
-
-		dbFilePath = path;
-		Db = await DatabaseGui.TryOpenOrCreateDatabaseFromPath(path, window, CheckCanUpgradeDatabase);
-
-		OnPropertyChanged(nameof(Db));
-		OnPropertyChanged(nameof(HasDatabase));
-	}
-
-	private async Task<bool> CheckCanUpgradeDatabase() {
-		return DialogResult.YesNo.Yes == await DatabaseGui.ShowCanUpgradeDatabaseDialog(window);
-	}
-
-	public void CloseDatabase() {
-		Dispose();
-		OnPropertyChanged(nameof(Db));
-		OnPropertyChanged(nameof(HasDatabase));
-	}
-
-	public async void ShowAboutDialog() {
-		await new AboutWindow { DataContext = new AboutWindowModel() }.ShowDialog(this.window);
-	}
-
-	public void Exit() {
-		window.Close();
-	}
-
-	public void Dispose() {
-		Db?.Dispose();
-		Db = null;
-	}
-}

app/Desktop/App/Windows/AboutWindow.axaml

@@ -1,67 +0,0 @@
-<Window xmlns="https://github.com/avaloniaui"
-        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"
-        xmlns:windows="clr-namespace:DHT.Desktop.App.Windows"
-        mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="295"
-        x:Class="DHT.Desktop.App.Windows.AboutWindow"
-        Title="About Discord History Tracker"
-        Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
-        Width="480" Height="295" CanResize="False"
-        WindowStartupLocation="CenterOwner">
-
-    <Design.DataContext>
-        <windows:AboutWindowModel />
-    </Design.DataContext>
-
-    <Window.Styles>
-        <Style Selector="StackPanel">
-            <Setter Property="Orientation" Value="Horizontal" />
-            <Setter Property="Spacing" Value="5" />
-        </Style>
-        <Style Selector="TextBlock">
-            <Setter Property="TextWrapping" Value="Wrap" />
-            <Setter Property="VerticalAlignment" Value="Center" />
-        </Style>
-        <Style Selector="Grid > Button">
-            <Setter Property="Margin" Value="0 4" />
-            <Setter Property="Padding" Value="8 4" />
-            <Setter Property="HorizontalAlignment" Value="Stretch" />
-        </Style>
-    </Window.Styles>
-
-    <StackPanel Orientation="Vertical" Margin="20" Spacing="12">
-
-        <TextBlock VerticalAlignment="Center">
-            Discord History Tracker was created by chylex and released under the MIT license.
-        </TextBlock>
-
-        <StackPanel>
-            <Button Command="{Binding ShowOfficialWebsite}">Official Website</Button>
-            <Button Command="{Binding ShowSourceCode}">Source Code</Button>
-        </StackPanel>
-
-        <Grid RowDefinitions="Auto,5,Auto,Auto,Auto,Auto,Auto,Auto" ColumnDefinitions="175,125,*" Margin="0 10 0 0">
-            <TextBlock Grid.Row="0" Grid.Column="0" FontWeight="Bold">Third-Party Software</TextBlock>
-            <TextBlock Grid.Row="0" Grid.Column="1" FontWeight="Bold">License</TextBlock>
-            <TextBlock Grid.Row="0" Grid.Column="2" FontWeight="Bold">Link</TextBlock>
-
-            <TextBlock Grid.Row="2" Grid.Column="0">.NET 8</TextBlock>
-            <TextBlock Grid.Row="2" Grid.Column="1">MIT</TextBlock>
-            <Button Grid.Row="2" Grid.Column="2" Command="{Binding ShowLibraryNetCore}">GitHub</Button>
-
-            <TextBlock Grid.Row="3" Grid.Column="0">Avalonia</TextBlock>
-            <TextBlock Grid.Row="3" Grid.Column="1">MIT</TextBlock>
-            <Button Grid.Row="3" Grid.Column="2" Command="{Binding ShowLibraryAvalonia}">NuGet</Button>
-
-            <TextBlock Grid.Row="4" Grid.Column="0">SQLite</TextBlock>
-            <TextBlock Grid.Row="4" Grid.Column="1">Public Domain</TextBlock>
-            <Button Grid.Row="4" Grid.Column="2" Command="{Binding ShowLibrarySqlite}">Official Website</Button>
-
-            <TextBlock Grid.Row="5" Grid.Column="0">Microsoft.Data.Sqlite</TextBlock>
-            <TextBlock Grid.Row="5" Grid.Column="1">Apache-2.0</TextBlock>
-            <Button Grid.Row="5" Grid.Column="2" Command="{Binding ShowLibrarySqliteAdoNet}">NuGet</Button>
-        </Grid>
-
-    </StackPanel>
-</Window>

app/Desktop/App/Windows/AboutWindowModel.cs

@@ -1,33 +0,0 @@
-using System.Diagnostics;
-
-namespace DHT.Desktop.App.Windows;
-
-sealed class AboutWindowModel {
-	public void ShowOfficialWebsite() {
-		OpenUrl("https://dht.chylex.com");
-	}
-
-	public void ShowSourceCode() {
-		OpenUrl("https://github.com/chylex/Discord-History-Tracker");
-	}
-
-	public void ShowLibraryAvalonia() {
-		OpenUrl("https://www.nuget.org/packages/Avalonia");
-	}
-
-	public void ShowLibrarySqlite() {
-		OpenUrl("https://www.sqlite.org");
-	}
-
-	public void ShowLibrarySqliteAdoNet() {
-		OpenUrl("https://www.nuget.org/packages/Microsoft.Data.Sqlite");
-	}
-
-	public void ShowLibraryNetCore() {
-		OpenUrl("https://github.com/dotnet/core");
-	}
-
-	private static void OpenUrl(string url) {
-		Process.Start(new ProcessStartInfo { FileName = url, UseShellExecute = true });
-	}
-}

app/Desktop/App/Windows/MainWindow.axaml.cs

@@ -1,26 +0,0 @@
-using System;
-using System.Diagnostics.CodeAnalysis;
-using Avalonia.Controls;
-using JetBrains.Annotations;
-
-namespace DHT.Desktop.App.Windows;
-
-[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-public sealed partial class MainWindow : Window {
-	[UsedImplicitly]
-	public MainWindow() {
-		InitializeComponent();
-		DataContext = new MainWindowModel(this, Arguments.Empty);
-	}
-
-	internal MainWindow(Arguments args) {
-		InitializeComponent();
-		DataContext = new MainWindowModel(this, args);
-	}
-
-	public void OnClosed(object? sender, EventArgs e) {
-		if (DataContext is IDisposable disposable) {
-			disposable.Dispose();
-		}
-	}
-}

app/Desktop/App/Windows/MainWindowModel.cs

@@ -1,116 +0,0 @@
-using System;
-using System.ComponentModel;
-using System.IO;
-using System.Runtime.InteropServices;
-using System.Threading.Tasks;
-using Avalonia.Controls;
-using DHT.Desktop.App.Dialogs.Message;
-using DHT.Desktop.App.Screens;
-using DHT.Desktop.Server;
-using DHT.Server.Database;
-using DHT.Utils.Models;
-
-namespace DHT.Desktop.App.Windows;
-
-sealed class MainWindowModel : BaseModel, IDisposable {
-	private const string DefaultTitle = "Discord History Tracker";
-
-	public string Title { get; private set; } = DefaultTitle;
-
-	public UserControl CurrentScreen { get; private set; }
-
-	private readonly WelcomeScreen welcomeScreen;
-	private readonly WelcomeScreenModel welcomeScreenModel;
-
-	private MainContentScreen? mainContentScreen;
-	private MainContentScreenModel? mainContentScreenModel;
-
-	private readonly Window window;
-
-	private IDatabaseFile? db;
-
-	[Obsolete("Designer")]
-	public MainWindowModel() : this(null!, Arguments.Empty) {}
-
-	public MainWindowModel(Window window, Arguments args) {
-		this.window = window;
-
-		welcomeScreenModel = new WelcomeScreenModel(window);
-		welcomeScreen = new WelcomeScreen { DataContext = welcomeScreenModel };
-		CurrentScreen = welcomeScreen;
-
-		welcomeScreenModel.PropertyChanged += WelcomeScreenModelOnPropertyChanged;
-
-		var dbFile = args.DatabaseFile;
-		if (!string.IsNullOrWhiteSpace(dbFile)) {
-			async void OnWindowOpened(object? o, EventArgs eventArgs) {
-				window.Opened -= OnWindowOpened;
-
-				// https://github.com/AvaloniaUI/Avalonia/issues/3071
-				if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
-					await Task.Delay(500);
-				}
-
-				if (File.Exists(dbFile)) {
-					await welcomeScreenModel.OpenOrCreateDatabaseFromPath(dbFile);
-				}
-				else {
-					await Dialog.ShowOk(window, "Database Error", "Database file not found:\n" + dbFile);
-				}
-			}
-
-			window.Opened += OnWindowOpened;
-		}
-
-		if (args.ServerPort != null) {
-			ServerManager.Port = args.ServerPort.Value;
-		}
-
-		if (args.ServerToken != null) {
-			ServerManager.Token = args.ServerToken;
-		}
-	}
-
-	private async void WelcomeScreenModelOnPropertyChanged(object? sender, PropertyChangedEventArgs e) {
-		if (e.PropertyName == nameof(welcomeScreenModel.Db)) {
-			if (mainContentScreenModel != null) {
-				mainContentScreenModel.DatabaseClosed -= MainContentScreenModelOnDatabaseClosed;
-				mainContentScreenModel.Dispose();
-			}
-
-			db?.Dispose();
-			db = welcomeScreenModel.Db;
-
-			if (db == null) {
-				Title = DefaultTitle;
-				mainContentScreenModel = null;
-				mainContentScreen = null;
-				CurrentScreen = welcomeScreen;
-			}
-			else {
-				Title = Path.GetFileName(db.Path) + " - " + DefaultTitle;
-				mainContentScreenModel = new MainContentScreenModel(window, db);
-				await mainContentScreenModel.Initialize();
-				mainContentScreenModel.DatabaseClosed += MainContentScreenModelOnDatabaseClosed;
-				mainContentScreen = new MainContentScreen { DataContext = mainContentScreenModel };
-				CurrentScreen = mainContentScreen;
-			}
-
-			OnPropertyChanged(nameof(CurrentScreen));
-			OnPropertyChanged(nameof(Title));
-
-			window.Focus();
-		}
-	}
-
-	private void MainContentScreenModelOnDatabaseClosed(object? sender, EventArgs e) {
-		welcomeScreenModel.CloseDatabase();
-	}
-
-	public void Dispose() {
-		welcomeScreenModel.Dispose();
-		mainContentScreenModel?.Dispose();
-		db?.Dispose();
-		db = null;
-	}
-}

app/Desktop/Arguments.cs

@@ -1,61 +1,83 @@
-using System;
+using System.Collections.Generic;
 using DHT.Utils.Logging;
 
 namespace DHT.Desktop;
 
 sealed class Arguments {
 	private static readonly Log Log = Log.ForType<Arguments>();
-
-	public static Arguments Empty => new(Array.Empty<string>());
-
+	
+	private const int FirstArgument = 1;
+	
+	public static Arguments Empty => new ([]);
+	
+	public bool Console { get; }
 	public string? DatabaseFile { get; }
 	public ushort? ServerPort { get; }
 	public string? ServerToken { get; }
-
-	public Arguments(string[] args) {
-		for (int i = 0; i < args.Length; i++) {
+	public byte? ConcurrentDownloads { get; }
+	
+	public Arguments(IReadOnlyList<string> args) {
+		for (int i = FirstArgument; i < args.Count; i++) {
 			string key = args[i];
-
+			
 			switch (key) {
 				case "-debug":
 					Log.IsDebugEnabled = true;
 					continue;
+				
+				case "-console":
+					Console = true;
+					continue;
 			}
-
+			
 			string value;
-
-			if (i == 0 && !key.StartsWith('-')) {
+			
+			if (i == FirstArgument && !key.StartsWith('-')) {
 				value = key;
 				key = "-db";
 			}
-			else if (i >= args.Length - 1) {
+			else if (i >= args.Count - 1) {
 				Log.Warn("Missing value for command line argument: " + key);
 				continue;
 			}
 			else {
 				value = args[++i];
 			}
-
+			
 			switch (key) {
 				case "-db":
 					DatabaseFile = value;
 					continue;
-
+				
 				case "-port": {
-					if (ushort.TryParse(value, out var port)) {
-						ServerPort = port;
-					}
-					else {
+					if (!ushort.TryParse(value, out ushort port)) {
 						Log.Warn("Invalid port number: " + value);
 					}
-
+					else {
+						ServerPort = port;
+					}
+					
 					continue;
 				}
-
+				
 				case "-token":
 					ServerToken = value;
 					continue;
-
+				
+				case "-concurrentdownloads":
+					if (!ulong.TryParse(value, out ulong concurrentDownloads) || concurrentDownloads == 0) {
+						Log.Warn("Invalid concurrent downloads count: " + value);
+					}
+					else if (concurrentDownloads > 10) {
+						Log.Warn("Limiting concurrent downloads to 10.");
+						ConcurrentDownloads = 10;
+					}
+					else {
+						ConcurrentDownloads = (byte) concurrentDownloads;
+					}
+					
+					continue;
+				
 				default:
 					Log.Warn("Unknown command line argument: " + key);
 					break;

app/Desktop/Common/AvaloniaReflection.cs

@@ -0,0 +1,25 @@
+using System;
+using System.Collections;
+using System.Reflection;
+using Avalonia.Interactivity;
+
+namespace DHT.Desktop.Common;
+
+static class AvaloniaReflection {
+	private static FieldInfo InteractiveEventHandlersField { get; } = typeof(Interactive).GetField("_eventHandlers", BindingFlags.Instance | BindingFlags.NonPublic)!;
+	
+	public static void Check() {
+		if (InteractiveEventHandlersField == null) {
+			throw new InvalidOperationException("Missing field: " + nameof(InteractiveEventHandlersField));
+		}
+		
+		if (InteractiveEventHandlersField.FieldType.ToString() != "System.Collections.Generic.Dictionary`2[Avalonia.Interactivity.RoutedEvent,System.Collections.Generic.List`1[Avalonia.Interactivity.Interactive+EventSubscription]]") {
+			throw new InvalidOperationException("Invalid field type: " + nameof(InteractiveEventHandlersField) + " = " + InteractiveEventHandlersField.FieldType);
+		}
+	}
+	
+	public static IList? GetEventHandler(Interactive target, RoutedEvent routedEvent) {
+		IDictionary? eventHandlers = (IDictionary?) InteractiveEventHandlersField.GetValue(target);
+		return (IList?) eventHandlers?[routedEvent];
+	}
+}

app/Desktop/Common/BytesValueConverter.cs

@@ -2,39 +2,39 @@ using System;
 using System.Globalization;
 using Avalonia.Data.Converters;
 
-namespace DHT.Desktop.App.Common;
+namespace DHT.Desktop.Common;
 
 sealed class BytesValueConverter : IValueConverter {
 	private sealed class Unit {
 		private readonly string label;
 		private readonly string numberFormat;
-
+		
 		public Unit(string label, int decimalPlaces) {
 			this.label = label;
 			this.numberFormat = "{0:n" + decimalPlaces + "}";
 		}
-
+		
 		public string Format(double size) {
 			return string.Format(Program.Culture, numberFormat, size) + " " + label;
 		}
 	}
-
-	private static readonly Unit[] Units = {
-		new ("B", decimalPlaces: 0),
-		new ("kB", decimalPlaces: 0),
-		new ("MB", decimalPlaces: 1),
-		new ("GB", decimalPlaces: 1),
-		new ("TB", decimalPlaces: 1)
-	};
-
+	
+	private static readonly Unit[] Units = [
+		new Unit("B", decimalPlaces: 0),
+		new Unit("kB", decimalPlaces: 0),
+		new Unit("MB", decimalPlaces: 1),
+		new Unit("GB", decimalPlaces: 1),
+		new Unit("TB", decimalPlaces: 1)
+	];
+	
 	private const int Scale = 1000;
-
-	private static string Convert(ulong size) {
+	
+	public static string Convert(ulong size) {
 		int power = size == 0L ? 0 : (int) Math.Log(size, Scale);
 		int unit = power >= Units.Length ? Units.Length - 1 : power;
 		return Units[unit].Format(unit == 0 ? size : size / Math.Pow(Scale, unit));
 	}
-
+	
 	public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture) {
 		if (value is long size and >= 0L) {
 			return Convert((ulong) size);
@@ -46,7 +46,7 @@ sealed class BytesValueConverter : IValueConverter {
 			return "-";
 		}
 	}
-
+	
 	public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture) {
 		throw new NotSupportedException();
 	}

app/Desktop/Common/DatabaseGui.cs

@@ -4,64 +4,65 @@ using System.IO;
 using System.Threading.Tasks;
 using Avalonia.Controls;
 using Avalonia.Platform.Storage;
-using DHT.Desktop.App.Dialogs.File;
-using DHT.Desktop.App.Dialogs.Message;
+using DHT.Desktop.Dialogs.File;
+using DHT.Desktop.Dialogs.Message;
 using DHT.Server.Database;
 using DHT.Server.Database.Exceptions;
 using DHT.Server.Database.Sqlite;
+using DHT.Server.Database.Sqlite.Schema;
 using DHT.Utils.Logging;
 
-namespace DHT.Desktop.App.Common;
+namespace DHT.Desktop.Common;
 
 static class DatabaseGui {
 	private static readonly Log Log = Log.ForType(typeof(DatabaseGui));
-
+	
 	private const string DatabaseFileInitialName = "archive.dht";
-
-	private static readonly IReadOnlyList<FilePickerFileType> DatabaseFileDialogFilter = new List<FilePickerFileType> {
-		FileDialogs.CreateFilter("Discord History Tracker Database", new [] { "dht" })
-	};
-
+	
+	private static readonly IReadOnlyList<FilePickerFileType> DatabaseFileDialogFilter = [
+		FileDialogs.CreateFilter("Discord History Tracker Database", ["dht"]),
+	];
+	
 	public static async Task<string[]> NewOpenDatabaseFilesDialog(Window window, string? suggestedDirectory) {
 		return await window.StorageProvider.OpenFiles(new FilePickerOpenOptions {
 			Title = "Open Database File",
 			FileTypeFilter = DatabaseFileDialogFilter,
 			SuggestedStartLocation = await FileDialogs.GetSuggestedStartLocation(window, suggestedDirectory),
-			AllowMultiple = true
+			AllowMultiple = true,
 		});
 	}
-
+	
 	public static async Task<string?> NewOpenOrCreateDatabaseFileDialog(Window window, string? suggestedDirectory) {
 		return await window.StorageProvider.SaveFile(new FilePickerSaveOptions {
 			Title = "Open or Create Database File",
 			FileTypeChoices = DatabaseFileDialogFilter,
 			SuggestedFileName = DatabaseFileInitialName,
 			SuggestedStartLocation = await FileDialogs.GetSuggestedStartLocation(window, suggestedDirectory),
-			ShowOverwritePrompt = false
+			ShowOverwritePrompt = false,
 		});
 	}
-
-	public static async Task<IDatabaseFile?> TryOpenOrCreateDatabaseFromPath(string path, Window window, Func<Task<bool>> checkCanUpgradeDatabase) {
+	
+	public static async Task<IDatabaseFile?> TryOpenOrCreateDatabaseFromPath(string path, Window window, ISchemaUpgradeCallbacks schemaUpgradeCallbacks) {
 		IDatabaseFile? file = null;
-
+		
 		try {
-			file = await SqliteDatabaseFile.OpenOrCreate(path, checkCanUpgradeDatabase);
+			file = await SqliteDatabaseFile.OpenOrCreate(path, schemaUpgradeCallbacks);
 		} catch (InvalidDatabaseVersionException ex) {
 			await Dialog.ShowOk(window, "Database Error", "Database '" + Path.GetFileName(path) + "' appears to be corrupted (invalid version: " + ex.Version + ").");
 		} catch (DatabaseTooNewException ex) {
 			await Dialog.ShowOk(window, "Database Error", "Database '" + Path.GetFileName(path) + "' was opened in a newer version of DHT (database version " + ex.DatabaseVersion + ", app version " + ex.CurrentVersion + ").");
 		} catch (Exception ex) {
-			Log.Error(ex);
+			Log.Error("Could not open database file: " + path, ex);
 			await Dialog.ShowOk(window, "Database Error", "Database '" + Path.GetFileName(path) + "' could not be opened:" + ex.Message);
 		}
-
+		
 		return file;
 	}
-
+	
 	public static async Task<DialogResult.YesNo> ShowCanUpgradeDatabaseDialog(Window window) {
 		return await Dialog.ShowYesNo(window, "Database Upgrade", "This database was created with an older version of DHT. If you proceed, the database will be upgraded and will no longer open in previous versions of DHT.\n\nPlease ensure you have a backup of the database. Do you want to proceed with the upgrade?");
 	}
-
+	
 	public static async Task<DialogResult.YesNo> ShowCanUpgradeMultipleDatabaseDialog(Window window) {
 		return await Dialog.ShowYesNo(window, "Database Upgrade", "One or more databases were created with an older version of DHT. If you proceed, these databases will be upgraded and will no longer open in previous versions of DHT. Otherwise, these databases will be skipped.\n\nPlease ensure you have a backup of the databases. Do you want to proceed with the upgrade?");
 	}

app/Desktop/Common/NumberValueConverter.cs

@@ -2,13 +2,13 @@ using System;
 using System.Globalization;
 using Avalonia.Data.Converters;
 
-namespace DHT.Desktop.App.Common;
+namespace DHT.Desktop.Common;
 
 sealed class NumberValueConverter : IValueConverter {
 	public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture) {
 		return value == null ? "-" : string.Format(Program.Culture, "{0:n0}", value);
 	}
-
+	
 	public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture) {
 		throw new NotSupportedException();
 	}

app/Desktop/Common/SystemUtils.cs

@@ -0,0 +1,9 @@
+using System.Diagnostics;
+
+namespace DHT.Desktop.Common;
+
+static class SystemUtils {
+	public static void OpenUrl(string url) {
+		Process.Start(new ProcessStartInfo(url) { UseShellExecute = true });
+	}
+}

app/Desktop/Common/TextFormat.cs

@@ -1,18 +1,18 @@
-namespace DHT.Desktop.App.Common;
+namespace DHT.Desktop.Common;
 
 static class TextFormat {
 	public static string Format(this int number) {
 		return number.ToString("N0", Program.Culture);
 	}
-
+	
 	public static string Format(this long number) {
 		return number.ToString("N0", Program.Culture);
 	}
-
+	
 	public static string Pluralize(this int number, string singular) {
 		return number.Format() + "\u00A0" + (number == 1 ? singular : singular + "s");
 	}
-
+	
 	public static string Pluralize(this long number, string singular) {
 		return number.Format() + "\u00A0" + (number == 1 ? singular : singular + "s");
 	}

app/Desktop/Desktop.csproj

@@ -1,107 +1,47 @@
 <Project Sdk="Microsoft.NET.Sdk">
+  
+  <PropertyGroup>
+    <RootNamespace>DHT.Desktop</RootNamespace>
+    <AssemblyName>DiscordHistoryTracker</AssemblyName>
+    <PackageId>DiscordHistoryTracker</PackageId>
+  </PropertyGroup>
+  
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <Nullable>enable</Nullable>
-    <AssemblyName>DiscordHistoryTracker</AssemblyName>
-    <RootNamespace>DHT.Desktop</RootNamespace>
-    <PackageId>DiscordHistoryTracker</PackageId>
-    <Authors>chylex</Authors>
-    <Company>DiscordHistoryTracker</Company>
-    <Product>DiscordHistoryTracker</Product>
     <ApplicationIcon>./Resources/icon.ico</ApplicationIcon>
+    <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
     <CheckForOverflowUnderflow>true</CheckForOverflowUnderflow>
     <SatelliteResourceLanguages>en</SatelliteResourceLanguages>
-    <GenerateAssemblyVersionAttribute>false</GenerateAssemblyVersionAttribute>
-    <GenerateAssemblyFileVersionAttribute>false</GenerateAssemblyFileVersionAttribute>
-    <GenerateAssemblyInformationalVersionAttribute>false</GenerateAssemblyInformationalVersionAttribute>
-  </PropertyGroup>
-  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
-    <DebugSymbols>true</DebugSymbols>
-    <DebugType>none</DebugType>
   </PropertyGroup>
+  
   <ItemGroup>
-    <PackageReference Include="Avalonia" Version="11.0.0" />
-    <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.0.0" />
-    <PackageReference Include="Avalonia.Controls.ItemsRepeater" Version="11.0.0" />
-    <PackageReference Include="Avalonia.Desktop" Version="11.0.0" />
-    <PackageReference Include="Avalonia.Diagnostics" Version="11.0.0" Condition=" '$(Configuration)' == 'Debug' " />
-    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.0.0" />
-    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.0" />
+    <PackageReference Include="Avalonia" Version="11.3.0" />
+    <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.3.0" />
+    <PackageReference Include="Avalonia.Controls.ItemsRepeater" Version="11.1.5" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.3.0" />
+    <PackageReference Include="Avalonia.Diagnostics" Version="11.3.0" Condition=" '$(Configuration)' == 'Debug' " />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.3.0" />
+    <PackageReference Include="Avalonia.ReactiveUI" Version="11.3.0" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.3.0" />
+    <PackageReference Include="PropertyChanged.SourceGenerator" Version="1.1.1">
+      <PrivateAssets>all</PrivateAssets>
+      <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
+    </PackageReference>
   </ItemGroup>
+  
   <ItemGroup>
     <ProjectReference Include="..\Server\Server.csproj" />
   </ItemGroup>
+  
   <ItemGroup>
     <Compile Include="..\Version.cs" Link="Version.cs" />
-    <Compile Update="App\App.axaml.cs">
-      <DependentUpon>App.axaml</DependentUpon>
-      <SubType>Code</SubType>
-    </Compile>
-    <Compile Update="App\Windows\AboutWindow.axaml.cs">
-      <DependentUpon>AboutWindow.axaml</DependentUpon>
-      <SubType>Code</SubType>
-    </Compile>
-    <Compile Update="App\Windows\MainWindow.axaml.cs">
-      <DependentUpon>MainWindow.axaml</DependentUpon>
-      <SubType>Code</SubType>
-    </Compile>
   </ItemGroup>
+  
   <ItemGroup>
     <AvaloniaResource Include="Resources/icon.ico" />
-    <EmbeddedResource Include="../Resources/Tracker/bootstrap.js">
-      <LogicalName>Tracker\%(RecursiveDir)%(Filename)%(Extension)</LogicalName>
-      <Link>Resources/Tracker/%(RecursiveDir)%(Filename)%(Extension)</Link>
-      <Visible>false</Visible>
-    </EmbeddedResource>
-    <EmbeddedResource Include="../Resources/Tracker/scripts/**" Condition=" '$(Configuration)' == 'Debug' ">
-      <LogicalName>Tracker\scripts\%(RecursiveDir)%(Filename)%(Extension)</LogicalName>
-      <Link>Resources/Tracker/scripts/%(RecursiveDir)%(Filename)%(Extension)</Link>
-      <Visible>false</Visible>
-    </EmbeddedResource>
-    <EmbeddedResource Include="../Resources/Tracker/styles/**">
-      <LogicalName>Tracker\styles\%(RecursiveDir)%(Filename)%(Extension)</LogicalName>
-      <Link>Resources/Tracker/styles/%(RecursiveDir)%(Filename)%(Extension)</Link>
-      <Visible>false</Visible>
-    </EmbeddedResource>
-    <EmbeddedResource Include="../Resources/Viewer/**">
-      <LogicalName>Viewer\%(RecursiveDir)%(Filename)%(Extension)</LogicalName>
-      <Link>Resources/Viewer/%(RecursiveDir)%(Filename)%(Extension)</Link>
-      <Visible>false</Visible>
+    <EmbeddedResource Include="Resources/tracker-loader.js">
+      <LogicalName>tracker-loader.js</LogicalName>
     </EmbeddedResource>
   </ItemGroup>
-  <ItemGroup>
-    <AdditionalFiles Include="App\Controls\ServerConfigurationPanel.axaml" />
-    <AdditionalFiles Include="App\Controls\StatusBar.axaml" />
-    <AdditionalFiles Include="App\Dialogs\CheckBox\CheckBoxDialog.axaml" />
-    <AdditionalFiles Include="App\Dialogs\Message\MessageDialog.axaml" />
-    <AdditionalFiles Include="App\Dialogs\Progress\ProgressDialog.axaml" />
-    <AdditionalFiles Include="App\Dialogs\TextBox\TextBoxDialog.axaml" />
-    <AdditionalFiles Include="App\Pages\AdvancedPage.axaml" />
-    <AdditionalFiles Include="App\Pages\DatabasePage.axaml" />
-    <AdditionalFiles Include="App\Pages\TrackingPage.axaml" />
-    <AdditionalFiles Include="App\Screens\MainContentScreen.axaml" />
-    <AdditionalFiles Include="App\Screens\WelcomeScreen.axaml" />
-  </ItemGroup>
-  <ItemGroup>
-    <UpToDateCheckInput Remove="Main\Pages\AdvancedPage.axaml" />
-    <UpToDateCheckInput Remove="Main\Pages\DatabasePage.axaml" />
-    <UpToDateCheckInput Remove="Main\Pages\TrackingPage.axaml" />
-    <UpToDateCheckInput Remove="Main\Screens\MainContentScreen.axaml" />
-    <UpToDateCheckInput Remove="Main\Screens\WelcomeScreen.axaml" />
-  </ItemGroup>
-  <Target Name="MinifyResources" BeforeTargets="PrepareForBuild" Condition=" '$(Configuration)' == 'Release' ">
-    <PropertyGroup>
-      <MinifiedResourceDir>$(ProjectDir)bin/.res/scripts</MinifiedResourceDir>
-    </PropertyGroup>
-    <ItemGroup>
-      <UpToDateCheckInput Include="$(ProjectDir)../Resources/Tracker/scripts/**" Visible="false" />
-      <EmbeddedResource Include="$(MinifiedResourceDir)/discord.js" LogicalName="Tracker\scripts\discord.js" Visible="false" />
-      <EmbeddedResource Include="$(MinifiedResourceDir)/dom.js" LogicalName="Tracker\scripts\dom.js" Visible="false" />
-      <EmbeddedResource Include="$(MinifiedResourceDir)/gui.js" LogicalName="Tracker\scripts\gui.js" Visible="false" />
-      <EmbeddedResource Include="$(MinifiedResourceDir)/settings.js" LogicalName="Tracker\scripts\settings.js" Visible="false" />
-      <EmbeddedResource Include="$(MinifiedResourceDir)/state.js" LogicalName="Tracker\scripts\state.js" Visible="false" />
-    </ItemGroup>
-    <RemoveDir Directories="$(ProjectDir)bin/.res/scripts" />
-    <Exec Command="python $(ProjectDir)../Resources/minify.py" WorkingDirectory="$(ProjectDir)../Resources" IgnoreExitCode="false" />
-  </Target>
+
 </Project>

app/Desktop/Dialogs/CheckBox/CheckBoxDialog.axaml

@@ -0,0 +1,51 @@
+<Window xmlns="https://github.com/avaloniaui"
+        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"
+        xmlns:namespace="clr-namespace:DHT.Desktop.Dialogs.CheckBox"
+        mc:Ignorable="d" d:DesignWidth="500"
+        x:Class="DHT.Desktop.Dialogs.CheckBox.CheckBoxDialog"
+        x:DataType="namespace:CheckBoxDialogModel"
+        Title="{Binding Title}"
+        Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
+        MinWidth="425" MinHeight="200"
+        Width="500" Height="395" CanResize="True"
+        WindowStartupLocation="CenterOwner">
+
+    <Window.DataContext>
+        <namespace:CheckBoxDialogModel />
+    </Window.DataContext>
+
+    <Window.Styles>
+        <Style Selector="TreeViewItem">
+            <Setter Property="IsExpanded" Value="True" />
+        </Style>
+    </Window.Styles>
+
+    <DockPanel Margin="20 17 20 20">
+        <Panel Classes="buttons" DockPanel.Dock="Bottom">
+            <WrapPanel>
+                <Button Command="{Binding SelectAll}" IsEnabled="{Binding !AreAllSelected}">Select All</Button>
+                <Button Command="{Binding SelectNone}" IsEnabled="{Binding !AreNoneSelected}">Select None</Button>
+            </WrapPanel>
+            <WrapPanel HorizontalAlignment="Right">
+                <Button Click="ClickOk">OK</Button>
+                <Button Click="ClickCancel">Cancel</Button>
+            </WrapPanel>
+        </Panel>
+        <ScrollViewer DockPanel.Dock="Top">
+            <TreeView Name="TreeView" Classes="noSelection" ItemsSource="{Binding RootItems}" ContainerPrepared="TreeViewOnContainerPrepared">
+                <TreeView.ItemTemplate>
+                    <TreeDataTemplate ItemsSource="{Binding Children}">
+                        <CheckBox IsChecked="{Binding IsChecked}">
+                            <Label>
+                                <TextBlock Text="{Binding Title}" TextWrapping="Wrap" />
+                            </Label>
+                        </CheckBox>
+                    </TreeDataTemplate>
+                </TreeView.ItemTemplate>
+            </TreeView>
+        </ScrollViewer>
+    </DockPanel>
+
+</Window>

app/Desktop/Dialogs/CheckBox/CheckBoxDialog.axaml.cs

@@ -0,0 +1,54 @@
+using System.Diagnostics.CodeAnalysis;
+using Avalonia.Controls;
+using Avalonia.Controls.Primitives;
+using Avalonia.Input;
+using Avalonia.Interactivity;
+using DHT.Desktop.Common;
+using DHT.Desktop.Dialogs.Message;
+
+namespace DHT.Desktop.Dialogs.CheckBox;
+
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class CheckBoxDialog : Window {
+	public CheckBoxDialog() {
+		InitializeComponent();
+	}
+	
+	private void TreeViewOnContainerPrepared(object? sender, ContainerPreparedEventArgs e) {
+		foreach (object? item in TreeView.Items) {
+			if (item != null && TreeView.ContainerFromItem(item) is TreeViewItem treeViewItem) {
+				treeViewItem.TemplateApplied += TreeViewItemOnTemplateApplied;
+				treeViewItem.GotFocus += TreeViewItemOnGotFocus;
+				treeViewItem.KeyDown += TreeViewItemOnKeyDown;
+			}
+		}
+	}
+	
+	private void TreeViewItemOnTemplateApplied(object? sender, TemplateAppliedEventArgs e) {
+		if (sender is TreeViewItem { HeaderPresenter: Interactive headerPresenter } ) {
+			// Removes support for double-clicking to expand.
+			AvaloniaReflection.GetEventHandler(headerPresenter, DoubleTappedEvent)?.Clear();
+		}
+	}
+	
+	private void TreeViewItemOnGotFocus(object? sender, GotFocusEventArgs e) {
+		if (e.NavigationMethod == NavigationMethod.Tab && sender is TreeViewItem treeViewItem && TreeView.SelectedItem == null) {
+			TreeView.SelectedItem = TreeView.ItemFromContainer(treeViewItem);
+		}
+	}
+	
+	private void TreeViewItemOnKeyDown(object? sender, KeyEventArgs e) {
+		if (e.Key == Key.Space && TreeView.SelectedItem is ICheckBoxItem item) {
+			item.IsChecked = item.IsChecked == false;
+			e.Handled = true;
+		}
+	}
+	
+	public void ClickOk(object? sender, RoutedEventArgs e) {
+		Close(DialogResult.OkCancel.Ok);
+	}
+	
+	public void ClickCancel(object? sender, RoutedEventArgs e) {
+		Close(DialogResult.OkCancel.Cancel);
+	}
+}

app/Desktop/Dialogs/CheckBox/CheckBoxDialogModel.cs

@@ -0,0 +1,73 @@
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.ComponentModel;
+using System.Linq;
+using PropertyChanged.SourceGenerator;
+
+namespace DHT.Desktop.Dialogs.CheckBox;
+
+partial class CheckBoxDialogModel {
+	public string Title { get; init; } = "";
+	
+	private ImmutableArray<ICheckBoxItem> rootItems = [];
+	
+	public ImmutableArray<ICheckBoxItem> RootItems {
+		get => rootItems;
+		
+		protected set {
+			foreach (ICheckBoxItem item in ICheckBoxItem.GetAllRecursively(rootItems)) {
+				item.PropertyChanged -= OnItemPropertyChanged;
+			}
+			
+			rootItems = value;
+			
+			foreach (ICheckBoxItem item in ICheckBoxItem.GetAllRecursively(rootItems)) {
+				item.PropertyChanged += OnItemPropertyChanged;
+			}
+		}
+	}
+	
+	protected IEnumerable<ICheckBoxItem> AllItems => ICheckBoxItem.GetAllRecursively(RootItems);
+	
+	[DependsOn(nameof(RootItems))]
+	public bool AreAllSelected => RootItems.All(static item => item.IsChecked == true);
+	
+	[DependsOn(nameof(RootItems))]
+	public bool AreNoneSelected => RootItems.All(static item => item.IsChecked == false);
+	
+	private bool pauseUpdatingBulkButtons = false;
+	
+	public void SelectAll() => SetAllChecked(true);
+	public void SelectNone() => SetAllChecked(false);
+	
+	private void SetAllChecked(bool isChecked) {
+		pauseUpdatingBulkButtons = true;
+		
+		foreach (ICheckBoxItem item in RootItems) {
+			item.IsChecked = isChecked;
+		}
+		
+		pauseUpdatingBulkButtons = false;
+		UpdateBulkButtons();
+	}
+	
+	private void OnItemPropertyChanged(object? sender, PropertyChangedEventArgs e) {
+		if (e.PropertyName == nameof(ICheckBoxItem.IsChecked) && !pauseUpdatingBulkButtons) {
+			UpdateBulkButtons();
+		}
+	}
+	
+	private void UpdateBulkButtons() {
+		OnPropertyChanged(new PropertyChangedEventArgs(nameof(RootItems)));
+	}
+}
+
+sealed class CheckBoxDialogModel<T> : CheckBoxDialogModel {
+	public IEnumerable<T> SelectedValues => AllItems.OfType<ICheckBoxItem.Leaf<T>>()
+	                                                .Where(static item => item.IsChecked == true)
+	                                                .Select(static item => item.Value);
+	
+	public CheckBoxDialogModel(ImmutableArray<ICheckBoxItem> items) {
+		this.RootItems = items;
+	}
+}

app/Desktop/Dialogs/CheckBox/CheckBoxItem.cs

@@ -0,0 +1,110 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.ComponentModel;
+using System.Linq;
+using PropertyChanged.SourceGenerator;
+
+namespace DHT.Desktop.Dialogs.CheckBox;
+
+partial interface ICheckBoxItem : INotifyPropertyChanged {
+	public string Title { get; }
+	public bool? IsChecked { get; set; }
+	
+	public ImmutableArray<ICheckBoxItem> Children { get; }
+	
+	void NotifyIsCheckedChanged();
+	
+	public static IEnumerable<ICheckBoxItem> GetAllRecursively(IEnumerable<ICheckBoxItem> items) {
+		Stack<ICheckBoxItem> stack = new Stack<ICheckBoxItem>(items);
+		
+		while (stack.TryPop(out var item)) {
+			yield return item;
+			
+			foreach (ICheckBoxItem child in item.Children) {
+				stack.Push(child);
+			}
+		}
+	}
+	
+	sealed class NonLeaf : ICheckBoxItem {
+		public string Title { get; }
+		
+		public bool? IsChecked {
+			get {
+				if (Children.Count(static child => child.IsChecked == true) == Children.Length) {
+					return true;
+				}
+				else if (Children.Count(static child => child.IsChecked == false) == Children.Length) {
+					return false;
+				}
+				else {
+					return null;
+				}
+			}
+			
+			set {
+				foreach (ICheckBoxItem child in Children) {
+					if (child is Leaf leaf) {
+						leaf.SetCheckedFromParent(value);
+					}
+					else {
+						child.IsChecked = value;
+					}
+				}
+				
+				NotifyIsCheckedChanged();
+				parent?.NotifyIsCheckedChanged();
+			}
+		}
+		
+		public ImmutableArray<ICheckBoxItem> Children { get; }
+		
+		public event PropertyChangedEventHandler? PropertyChanged;
+		
+		private readonly ICheckBoxItem? parent;
+		
+		public NonLeaf(string title, ICheckBoxItem? parent, Func<ICheckBoxItem, ImmutableArray<ICheckBoxItem>> children) {
+			this.parent = parent;
+			this.Title = title;
+			this.Children = children(this);
+		}
+		
+		public void NotifyIsCheckedChanged() {
+			PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsChecked)));
+		}
+	}
+	
+	partial class Leaf(string title, ICheckBoxItem? parent, bool isChecked) : ICheckBoxItem {
+		public string Title { get; } = title;
+		
+		public ImmutableArray<ICheckBoxItem> Children => ImmutableArray<ICheckBoxItem>.Empty;
+		
+		public readonly ICheckBoxItem? parent = parent;
+		
+		[Notify]
+		private bool? isChecked = isChecked;
+		
+		private bool notifyParent = true;
+		
+		public void SetCheckedFromParent(bool? isChecked) {
+			notifyParent = false;
+			IsChecked = isChecked;
+			notifyParent = true;
+		}
+		
+		private void OnIsCheckedChanged() {
+			if (notifyParent) {
+				parent?.NotifyIsCheckedChanged();
+			}
+		}
+		
+		void ICheckBoxItem.NotifyIsCheckedChanged() {
+			OnPropertyChanged(new PropertyChangedEventArgs(nameof(IsChecked)));
+		}
+	}
+	
+	sealed class Leaf<T>(string title, ICheckBoxItem? parent, T value, bool isChecked) : Leaf(title, parent, isChecked) {
+		public T Value => value;
+	}
+}

app/Desktop/Dialogs/CheckBox/CheckBoxItemList.cs

@@ -0,0 +1,46 @@
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.Linq;
+
+namespace DHT.Desktop.Dialogs.CheckBox;
+
+sealed class CheckBoxItemList<TKey, TValue> where TKey : notnull {
+	private readonly List<INode> rootNodes = [];
+	private readonly Dictionary<TKey, List<INode>> parentNodes = [];
+	
+	public void AddParent(TKey key, string title) {
+		if (!parentNodes.ContainsKey(key)) {
+			List<INode> children = [];
+			rootNodes.Add(new INode.NonLeaf(title, children));
+			parentNodes[key] = children;
+		}
+	}
+	
+	public void Add(TValue value, string title, bool isChecked = false) {
+		rootNodes.Add(new INode.Leaf(title, value, isChecked));
+	}
+	
+	public void Add(TKey key, TValue value, string title, bool isChecked = false) {
+		parentNodes.GetValueOrDefault(key, rootNodes).Add(new INode.Leaf(title, value, isChecked));
+	}
+	
+	public ImmutableArray<ICheckBoxItem> ToCheckBoxItems() {
+		return [..rootNodes.Select(static node => node.ToCheckBoxItem(null))];
+	}
+	
+	private interface INode {
+		ICheckBoxItem ToCheckBoxItem(ICheckBoxItem? parent);
+		
+		sealed record NonLeaf(string Title, List<INode> Children) : INode {
+			public ICheckBoxItem ToCheckBoxItem(ICheckBoxItem? parent) {
+				return new ICheckBoxItem.NonLeaf(Title, parent, self => [..Children.Select(child => child.ToCheckBoxItem(self))]);
+			}
+		}
+		
+		sealed record Leaf(string Title, TValue Value, bool IsChecked) : INode {
+			public ICheckBoxItem ToCheckBoxItem(ICheckBoxItem? parent) {
+				return new ICheckBoxItem.Leaf<TValue>(Title, parent, Value, IsChecked);
+			}
+		}
+	}
+}

app/Desktop/Dialogs/File/FileDialogs.cs

@@ -5,32 +5,36 @@ using System.Threading.Tasks;
 using Avalonia.Controls;
 using Avalonia.Platform.Storage;
 
-namespace DHT.Desktop.App.Dialogs.File;
+namespace DHT.Desktop.Dialogs.File;
 
 static class FileDialogs {
+	public static async Task<string[]> OpenFolders(this IStorageProvider storageProvider, FolderPickerOpenOptions options) {
+		return (await storageProvider.OpenFolderPickerAsync(options)).ToLocalPaths();
+	}
+	
 	public static async Task<string[]> OpenFiles(this IStorageProvider storageProvider, FilePickerOpenOptions options) {
 		return (await storageProvider.OpenFilePickerAsync(options)).ToLocalPaths();
 	}
-
+	
 	public static async Task<string?> SaveFile(this IStorageProvider storageProvider, FilePickerSaveOptions options) {
 		return (await storageProvider.SaveFilePickerAsync(options))?.ToLocalPath();
 	}
-
+	
 	public static FilePickerFileType CreateFilter(string name, string[] extensions) {
 		return new FilePickerFileType(name) {
-			Patterns = extensions.Select(static ext => "*." + ext).ToArray()
+			Patterns = extensions.Select(static ext => "*." + ext).ToArray(),
 		};
 	}
-
+	
 	public static Task<IStorageFolder?> GetSuggestedStartLocation(Window window, string? suggestedDirectory) {
 		return suggestedDirectory == null ? Task.FromResult<IStorageFolder?>(null) : window.StorageProvider.TryGetFolderFromPathAsync(suggestedDirectory);
 	}
-
-	private static string ToLocalPath(this IStorageFile file) {
-		return file.TryGetLocalPath() ?? throw new NotSupportedException("Local filesystem is not supported.");
+	
+	private static string ToLocalPath(this IStorageItem itme) {
+		return itme.TryGetLocalPath() ?? throw new NotSupportedException("Local filesystem is not supported.");
 	}
-
-	private static string[] ToLocalPaths(this IReadOnlyList<IStorageFile> files) {
-		return files.Select(ToLocalPath).ToArray();
+	
+	private static string[] ToLocalPaths(this IReadOnlyList<IStorageItem> items) {
+		return items.Select(ToLocalPath).ToArray();
 	}
 }

app/Desktop/Dialogs/Message/Dialog.cs

@@ -2,7 +2,7 @@ using System.Threading.Tasks;
 using Avalonia.Controls;
 using Avalonia.Threading;
 
-namespace DHT.Desktop.App.Dialogs.Message;
+namespace DHT.Desktop.Dialogs.Message;
 
 static class Dialog {
 	public static async Task ShowOk(Window owner, string title, string message) {
@@ -10,65 +10,65 @@ static class Dialog {
 			await Dispatcher.UIThread.InvokeAsync(() => ShowOk(owner, title, message));
 			return;
 		}
-
+		
 		await new MessageDialog {
 			DataContext = new MessageDialogModel {
 				Title = title,
 				Message = message,
-				IsOkVisible = true
-			}
+				IsOkVisible = true,
+			},
 		}.ShowDialog<DialogResult.All>(owner);
 	}
-
+	
 	public static async Task<DialogResult.OkCancel> ShowOkCancel(Window owner, string title, string message) {
 		if (!Dispatcher.UIThread.CheckAccess()) {
 			return await Dispatcher.UIThread.InvokeAsync(() => ShowOkCancel(owner, title, message));
 		}
-
+		
 		var result = await new MessageDialog {
 			DataContext = new MessageDialogModel {
 				Title = title,
 				Message = message,
 				IsOkVisible = true,
-				IsCancelVisible = true
-			}
+				IsCancelVisible = true,
+			},
 		}.ShowDialog<DialogResult.All?>(owner);
-
+		
 		return result.ToOkCancel();
 	}
-
+	
 	public static async Task<DialogResult.YesNo> ShowYesNo(Window owner, string title, string message) {
 		if (!Dispatcher.UIThread.CheckAccess()) {
 			return await Dispatcher.UIThread.InvokeAsync(() => ShowYesNo(owner, title, message));
 		}
-
-		var result = await new MessageDialog {
-			DataContext = new MessageDialogModel {
-				Title = title,
-				Message = message,
-				IsYesVisible = true,
-				IsNoVisible = true
-			}
-		}.ShowDialog<DialogResult.All?>(owner);
-
-		return result.ToYesNo();
-	}
-
-	public static async Task<DialogResult.YesNoCancel> ShowYesNoCancel(Window owner, string title, string message) {
-		if (!Dispatcher.UIThread.CheckAccess()) {
-			return await Dispatcher.UIThread.InvokeAsync(() => ShowYesNoCancel(owner, title, message));
-		}
-
+		
 		var result = await new MessageDialog {
 			DataContext = new MessageDialogModel {
 				Title = title,
 				Message = message,
 				IsYesVisible = true,
 				IsNoVisible = true,
-				IsCancelVisible = true
-			}
+			},
 		}.ShowDialog<DialogResult.All?>(owner);
-
+		
+		return result.ToYesNo();
+	}
+	
+	public static async Task<DialogResult.YesNoCancel> ShowYesNoCancel(Window owner, string title, string message) {
+		if (!Dispatcher.UIThread.CheckAccess()) {
+			return await Dispatcher.UIThread.InvokeAsync(() => ShowYesNoCancel(owner, title, message));
+		}
+		
+		var result = await new MessageDialog {
+			DataContext = new MessageDialogModel {
+				Title = title,
+				Message = message,
+				IsYesVisible = true,
+				IsNoVisible = true,
+				IsCancelVisible = true,
+			},
+		}.ShowDialog<DialogResult.All?>(owner);
+		
 		return result.ToYesNoCancel();
 	}
 }

app/Desktop/Dialogs/Message/DialogResult.cs

@@ -1,59 +1,59 @@
 using System;
 
-namespace DHT.Desktop.App.Dialogs.Message;
+namespace DHT.Desktop.Dialogs.Message;
 
 static class DialogResult {
 	public enum All {
 		Ok,
 		Yes,
 		No,
-		Cancel
+		Cancel,
 	}
-
+	
 	public enum OkCancel {
 		Closed,
 		Ok,
-		Cancel
+		Cancel,
 	}
-
+	
 	public enum YesNo {
 		Closed,
 		Yes,
-		No
+		No,
 	}
-
+	
 	public enum YesNoCancel {
 		Closed,
 		Yes,
 		No,
-		Cancel
+		Cancel,
 	}
-
+	
 	public static OkCancel ToOkCancel(this All? result) {
 		return result switch {
 			null       => OkCancel.Closed,
 			All.Ok     => OkCancel.Ok,
 			All.Cancel => OkCancel.Cancel,
-			_          => throw new ArgumentException("Cannot convert dialog result " + result + " to ok/cancel.")
+			_          => throw new ArgumentException("Cannot convert dialog result " + result + " to ok/cancel."),
 		};
 	}
-
+	
 	public static YesNo ToYesNo(this All? result) {
 		return result switch {
 			null    => YesNo.Closed,
 			All.Yes => YesNo.Yes,
 			All.No  => YesNo.No,
-			_       => throw new ArgumentException("Cannot convert dialog result " + result + " to yes/no.")
+			_       => throw new ArgumentException("Cannot convert dialog result " + result + " to yes/no."),
 		};
 	}
-
+	
 	public static YesNoCancel ToYesNoCancel(this All? result) {
 		return result switch {
 			null       => YesNoCancel.Closed,
 			All.Yes    => YesNoCancel.Yes,
 			All.No     => YesNoCancel.No,
 			All.Cancel => YesNoCancel.Cancel,
-			_          => throw new ArgumentException("Cannot convert dialog result " + result + " to yes/no/cancel.")
+			_          => throw new ArgumentException("Cannot convert dialog result " + result + " to yes/no/cancel."),
 		};
 	}
 }

app/Desktop/Dialogs/Message/MessageDialog.axaml

@@ -0,0 +1,37 @@
+<Window xmlns="https://github.com/avaloniaui"
+        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"
+        xmlns:namespace="clr-namespace:DHT.Desktop.Dialogs.Message"
+        mc:Ignorable="d" d:DesignWidth="500"
+        x:Class="DHT.Desktop.Dialogs.Message.MessageDialog"
+        x:DataType="namespace:MessageDialogModel"
+        Title="{Binding Title}"
+        Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
+        Width="500" SizeToContent="Height" CanResize="False"
+        WindowStartupLocation="CenterOwner">
+
+    <Window.DataContext>
+        <namespace:MessageDialogModel />
+    </Window.DataContext>
+
+    <Window.Styles>
+        <Style Selector="TextBlock">
+            <Setter Property="FontSize" Value="15" />
+            <Setter Property="TextWrapping" Value="Wrap" />
+        </Style>
+    </Window.Styles>
+
+    <StackPanel Margin="20">
+        <TextBlock Text="{Binding Message}" />
+        <Panel Classes="buttons">
+            <WrapPanel HorizontalAlignment="Right">
+                <Button Click="ClickOk" IsVisible="{Binding IsOkVisible}">OK</Button>
+                <Button Click="ClickYes" IsVisible="{Binding IsYesVisible}">Yes</Button>
+                <Button Click="ClickNo" IsVisible="{Binding IsNoVisible}">No</Button>
+                <Button Click="ClickCancel" IsVisible="{Binding IsCancelVisible}">Cancel</Button>
+            </WrapPanel>
+        </Panel>
+    </StackPanel>
+
+</Window>

app/Desktop/Dialogs/Message/MessageDialog.axaml.cs

@@ -2,26 +2,26 @@ using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
 
-namespace DHT.Desktop.App.Dialogs.Message;
+namespace DHT.Desktop.Dialogs.Message;
 
 [SuppressMessage("ReSharper", "MemberCanBeInternal")]
 public sealed partial class MessageDialog : Window {
 	public MessageDialog() {
 		InitializeComponent();
 	}
-
+	
 	public void ClickOk(object? sender, RoutedEventArgs e) {
 		Close(DialogResult.All.Ok);
 	}
-
+	
 	public void ClickYes(object? sender, RoutedEventArgs e) {
 		Close(DialogResult.All.Yes);
 	}
-
+	
 	public void ClickNo(object? sender, RoutedEventArgs e) {
 		Close(DialogResult.All.No);
 	}
-
+	
 	public void ClickCancel(object? sender, RoutedEventArgs e) {
 		Close(DialogResult.All.Cancel);
 	}

app/Desktop/Dialogs/Message/MessageDialogModel.cs

@@ -1,9 +1,9 @@
-namespace DHT.Desktop.App.Dialogs.Message;
+namespace DHT.Desktop.Dialogs.Message;
 
 sealed class MessageDialogModel {
 	public string Title { get; init; } = "";
 	public string Message { get; init; } = "";
-
+	
 	public bool IsOkVisible { get; init; } = false;
 	public bool IsYesVisible { get; init; } = false;
 	public bool IsNoVisible { get; init; } = false;

app/Desktop/Dialogs/Progress/DelayedProgressDialog.cs

@@ -0,0 +1,24 @@
+using System;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Threading;
+
+namespace DHT.Desktop.Dialogs.Progress;
+
+static class DelayedProgressDialog {
+	public static async ValueTask Await(Func<Task> taskProvider, TimeSpan delay, Window window, string progressDialogTitle, string progressDialogDescription) {
+		Dispatcher.UIThread.VerifyAccess();
+		
+		Task task = Task.Run(taskProvider);
+		if (task.IsCompleted) {
+			return;
+		}
+		
+		// Freeze the UI thread for a short while in case the task finishes quickly.
+		_ = Task.WhenAny(Task.Delay(delay), task).GetAwaiter().GetResult();
+		
+		if (!task.IsCompleted) {
+			await ProgressDialog.ShowIndeterminate(window, progressDialogTitle, progressDialogDescription, _ => task);
+		}
+	}
+}

app/Desktop/Dialogs/Progress/IProgressCallback.cs

@@ -0,0 +1,9 @@
+using System.Threading.Tasks;
+
+namespace DHT.Desktop.Dialogs.Progress;
+
+interface IProgressCallback {
+	Task Update(string message, long finishedItems, long totalItems);
+	Task UpdateIndeterminate(string message);
+	Task Hide();
+}

app/Desktop/Dialogs/Progress/ProgressDialog.axaml

@@ -2,9 +2,10 @@
         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"
-        xmlns:progress="clr-namespace:DHT.Desktop.App.Dialogs.Progress"
+        xmlns:namespace="clr-namespace:DHT.Desktop.Dialogs.Progress"
         mc:Ignorable="d" d:DesignWidth="500"
-        x:Class="DHT.Desktop.App.Dialogs.Progress.ProgressDialog"
+        x:Class="DHT.Desktop.Dialogs.Progress.ProgressDialog"
+        x:DataType="namespace:ProgressDialogModel"
         Title="{Binding Title}"
         Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
         Opened="OnOpened"
@@ -13,7 +14,7 @@
         WindowStartupLocation="CenterOwner">
 
     <Window.DataContext>
-        <progress:ProgressDialogModel />
+        <namespace:ProgressDialogModel />
     </Window.DataContext>
 
     <Window.Styles>
@@ -31,12 +32,18 @@
         </Style>
     </Window.Styles>
 
-    <StackPanel Margin="20">
-        <DockPanel>
-            <TextBlock DockPanel.Dock="Right" Text="{Binding Items}" Classes="items" />
-            <TextBlock DockPanel.Dock="Left" Text="{Binding Message}" />
-        </DockPanel>
-        <ProgressBar Value="{Binding Progress}" />
-    </StackPanel>
+    <ItemsRepeater ItemsSource="{Binding Items}" Margin="0 10">
+        <ItemsRepeater.ItemTemplate>
+            <DataTemplate>
+                <StackPanel Margin="20 10" IsHitTestVisible="{Binding IsVisible}" Opacity="{Binding Opacity}">
+                    <DockPanel>
+                        <TextBlock DockPanel.Dock="Right" Text="{Binding Items}" Classes="items" />
+                        <TextBlock DockPanel.Dock="Left" Text="{Binding Message}" />
+                    </DockPanel>
+                    <ProgressBar IsIndeterminate="{Binding IsIndeterminate}" Value="{Binding Progress}" />
+                </StackPanel>
+            </DataTemplate>
+        </ItemsRepeater.ItemTemplate>
+    </ItemsRepeater>
 
 </Window>

app/Desktop/Dialogs/Progress/ProgressDialog.axaml.cs

@@ -0,0 +1,80 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+
+namespace DHT.Desktop.Dialogs.Progress;
+
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class ProgressDialog : Window {
+	private static readonly TimeSpan MinimumShowDuration = TimeSpan.FromMilliseconds(500);
+	
+	internal static async Task Show(Window owner, string title, Func<ProgressDialog, IProgressCallback, Task> action) {
+		var dialog = new ProgressDialog();
+		dialog.DataContext = new ProgressDialogModel(title, async callbacks => await action(dialog, callbacks[0]));
+		await dialog.ShowProgressDialog(owner);
+	}
+	
+	internal static async Task<T> Show<T>(Window owner, string title, Func<ProgressDialog, IProgressCallback, Task<T>> action) {
+		var taskCompletionSource = new TaskCompletionSource<T>();
+		var dialog = new ProgressDialog();
+		
+		dialog.DataContext = new ProgressDialogModel(title, async callbacks => {
+			taskCompletionSource.SetResult(await action(dialog, callbacks[0]));
+		});
+		
+		await dialog.ShowProgressDialog(owner);
+		return await taskCompletionSource.Task;
+	}
+	
+	internal static Task ShowIndeterminate(Window owner, string title, string message, Func<ProgressDialog, Task> action) {
+		return Show(owner, title, async (dialog, callback) => {
+			await callback.UpdateIndeterminate(message);
+			await action(dialog);
+		});
+	}
+	
+	internal static Task<T> ShowIndeterminate<T>(Window owner, string title, string message, Func<ProgressDialog, Task<T>> action) {
+		return Show<T>(owner, title, async (dialog, callback) => {
+			await callback.UpdateIndeterminate(message);
+			return await action(dialog);
+		});
+	}
+	
+	private bool isFinished = false;
+	private DateTime startTime = DateTime.Now;
+	private Task progressTask = Task.CompletedTask;
+	
+	public ProgressDialog() {
+		InitializeComponent();
+	}
+	
+	public void OnOpened(object? sender, EventArgs e) {
+		startTime = DateTime.Now;
+		
+		if (DataContext is ProgressDialogModel model) {
+			progressTask = Task.Run(model.StartTask);
+			progressTask.ContinueWith(OnFinished, TaskScheduler.FromCurrentSynchronizationContext());
+		}
+	}
+	
+	public void OnClosing(object? sender, WindowClosingEventArgs e) {
+		e.Cancel = !isFinished;
+	}
+	
+	private async Task OnFinished(Task task) {
+		isFinished = true;
+		
+		TimeSpan elapsedTime = DateTime.Now - startTime;
+		if (elapsedTime < MinimumShowDuration) {
+			await Task.Delay(MinimumShowDuration - elapsedTime);
+		}
+		
+		Close();
+	}
+	
+	public async Task ShowProgressDialog(Window owner) {
+		await ShowDialog(owner);
+		await progressTask;
+	}
+}

app/Desktop/Dialogs/Progress/ProgressDialogModel.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Avalonia.Threading;
+using DHT.Desktop.Common;
+
+namespace DHT.Desktop.Dialogs.Progress;
+
+sealed class ProgressDialogModel {
+	public string Title { get; init; } = "";
+	
+	public IReadOnlyList<ProgressItem> Items { get; } = [];
+	
+	private readonly TaskRunner? task;
+	
+	[Obsolete("Designer")]
+	public ProgressDialogModel() {}
+	
+	public ProgressDialogModel(string title, TaskRunner task, int progressItems = 1) {
+		this.Title = title;
+		this.task = task;
+		this.Items = Enumerable.Range(start: 0, progressItems).Select(static _ => new ProgressItem()).ToArray();
+	}
+	
+	internal async Task StartTask() {
+		if (task != null) {
+			await task(Items.Select(static item => new Callback(item)).ToArray());
+		}
+	}
+	
+	public delegate Task TaskRunner(IReadOnlyList<IProgressCallback> callbacks);
+	
+	private sealed class Callback : IProgressCallback {
+		private readonly ProgressItem item;
+		
+		public Callback(ProgressItem item) {
+			this.item = item;
+		}
+		
+		public async Task Update(string message, long finishedItems, long totalItems) {
+			await Dispatcher.UIThread.InvokeAsync(() => {
+				item.Message = message;
+				item.Items = totalItems == 0 ? string.Empty : finishedItems.Format() + " / " + totalItems.Format();
+				item.Progress = totalItems == 0 ? 0 : 100 * finishedItems / totalItems;
+				item.IsIndeterminate = false;
+			});
+		}
+		
+		public async Task UpdateIndeterminate(string message) {
+			await Dispatcher.UIThread.InvokeAsync(() => {
+				item.Message = message;
+				item.Items = string.Empty;
+				item.Progress = 0;
+				item.IsIndeterminate = true;
+			});
+		}
+		
+		public Task Hide() {
+			return Update(string.Empty, finishedItems: 0, totalItems: 0);
+		}
+	}
+}

app/Desktop/Dialogs/Progress/ProgressItem.cs

@@ -0,0 +1,23 @@
+using PropertyChanged.SourceGenerator;
+
+namespace DHT.Desktop.Dialogs.Progress;
+
+sealed partial class ProgressItem {
+	[Notify]
+	private string message = "";
+	
+	[Notify]
+	private string items = "";
+	
+	[Notify]
+	private long progress = 0L;
+	
+	[Notify]
+	private bool isIndeterminate;
+	
+	[DependsOn(nameof(Message))]
+	public bool IsVisible => !string.IsNullOrEmpty(Message);
+	
+	[DependsOn(nameof(IsVisible))]
+	public double Opacity => IsVisible ? 1.0 : 0.0;
+}

app/Desktop/Dialogs/TextBox/TextBoxDialog.axaml

@@ -2,31 +2,19 @@
         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"
-        xmlns:textBox="clr-namespace:DHT.Desktop.App.Dialogs.TextBox"
+        xmlns:namespace="clr-namespace:DHT.Desktop.Dialogs.TextBox"
         mc:Ignorable="d" d:DesignWidth="500"
-        x:Class="DHT.Desktop.App.Dialogs.TextBox.TextBoxDialog"
+        x:Class="DHT.Desktop.Dialogs.TextBox.TextBoxDialog"
+        x:DataType="namespace:TextBoxDialogModel"
         Title="{Binding Title}"
         Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
         Width="500" SizeToContent="Height" CanResize="False"
         WindowStartupLocation="CenterOwner">
 
     <Window.DataContext>
-        <textBox:TextBoxDialogModel />
+        <namespace:TextBoxDialogModel />
     </Window.DataContext>
 
-    <Window.Styles>
-        <Style Selector="Panel.buttons">
-            <Setter Property="Margin" Value="0 20 0 0" />
-        </Style>
-        <Style Selector="Panel.buttons > WrapPanel.right">
-            <Setter Property="HorizontalAlignment" Value="Right" />
-        </Style>
-        <Style Selector="Panel.buttons Button">
-            <Setter Property="MinWidth" Value="80" />
-            <Setter Property="Margin" Value="8 0 0 0" />
-        </Style>
-    </Window.Styles>
-
     <StackPanel Margin="20">
         <ScrollViewer MaxHeight="400">
             <StackPanel Spacing="10">
@@ -46,7 +34,7 @@
             </StackPanel>
         </ScrollViewer>
         <Panel Classes="buttons">
-            <WrapPanel Classes="right">
+            <WrapPanel HorizontalAlignment="Right">
                 <Button Click="ClickOk" IsEnabled="{Binding !HasErrors}">OK</Button>
                 <Button Click="ClickCancel">Cancel</Button>
             </WrapPanel>

app/Desktop/Dialogs/TextBox/TextBoxDialog.axaml.cs

@@ -1,20 +1,20 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
-using DHT.Desktop.App.Dialogs.Message;
+using DHT.Desktop.Dialogs.Message;
 
-namespace DHT.Desktop.App.Dialogs.TextBox; 
+namespace DHT.Desktop.Dialogs.TextBox;
 
 [SuppressMessage("ReSharper", "MemberCanBeInternal")]
 public sealed partial class TextBoxDialog : Window {
 	public TextBoxDialog() {
 		InitializeComponent();
 	}
-
+	
 	public void ClickOk(object? sender, RoutedEventArgs e) {
 		Close(DialogResult.OkCancel.Ok);
 	}
-
+	
 	public void ClickCancel(object? sender, RoutedEventArgs e) {
 		Close(DialogResult.OkCancel.Cancel);
 	}

app/Desktop/Dialogs/TextBox/TextBoxDialogModel.cs

@@ -1,45 +1,45 @@
-using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
-using DHT.Utils.Models;
+using PropertyChanged.SourceGenerator;
 
-namespace DHT.Desktop.App.Dialogs.TextBox; 
+namespace DHT.Desktop.Dialogs.TextBox;
 
-class TextBoxDialogModel : BaseModel {
+partial class TextBoxDialogModel {
 	public string Title { get; init; } = "";
 	public string Description { get; init; } = "";
-
-	private IReadOnlyList<TextBoxItem> items = Array.Empty<TextBoxItem>();
-
+	
+	private IReadOnlyList<TextBoxItem> items = [];
+	
 	public IReadOnlyList<TextBoxItem> Items {
 		get => items;
-
+		
 		protected set {
-			foreach (var item in items) {
+			foreach (TextBoxItem item in items) {
 				item.ErrorsChanged -= OnItemErrorsChanged;
 			}
-
+			
 			items = value;
-
-			foreach (var item in items) {
+			
+			foreach (TextBoxItem item in items) {
 				item.ErrorsChanged += OnItemErrorsChanged;
 			}
 		}
 	}
-		
+	
+	[DependsOn(nameof(Items))]
 	public bool HasErrors => Items.Any(static item => !item.IsValid);
-
+	
 	private void OnItemErrorsChanged(object? sender, DataErrorsChangedEventArgs e) {
-		OnPropertyChanged(nameof(HasErrors));
+		OnPropertyChanged(new PropertyChangedEventArgs(nameof(Items)));
 	}
 }
 
 sealed class TextBoxDialogModel<T> : TextBoxDialogModel {
-	public new IReadOnlyList<TextBoxItem<T>> Items { get; }
-
+	private new IReadOnlyList<TextBoxItem<T>> Items { get; }
+	
 	public IEnumerable<TextBoxItem<T>> ValidItems => Items.Where(static item => item.IsValid);
-
+	
 	public TextBoxDialogModel(IEnumerable<TextBoxItem<T>> items) {
 		this.Items = new List<TextBoxItem<T>>(items);
 		base.Items = this.Items;

app/Desktop/Dialogs/TextBox/TextBoxItem.cs

@@ -1,40 +1,37 @@
 using System;
 using System.Collections;
 using System.ComponentModel;
-using DHT.Utils.Models;
+using PropertyChanged.SourceGenerator;
 
-namespace DHT.Desktop.App.Dialogs.TextBox; 
+namespace DHT.Desktop.Dialogs.TextBox;
 
-class TextBoxItem : BaseModel, INotifyDataErrorInfo {
+partial class TextBoxItem : INotifyDataErrorInfo {
 	public string Title { get; init; } = "";
 	public object? Item { get; init; } = null;
-		
+	
 	public Func<string, bool> ValidityCheck { get; init; } = static _ => true;
 	public bool IsValid => ValidityCheck(Value);
-
+	
+	[Notify]
 	private string value = string.Empty;
-
-	public string Value {
-		get => this.value;
-		set {
-			Change(ref this.value, value);
-			ErrorsChanged?.Invoke(this, new DataErrorsChangedEventArgs(nameof(Value)));
-		}
+	
+	private void OnValueChanged() {
+		ErrorsChanged?.Invoke(this, new DataErrorsChangedEventArgs(nameof(Value)));
 	}
-
+	
 	public IEnumerable GetErrors(string? propertyName) {
 		if (propertyName == nameof(Value) && !IsValid) {
 			yield return string.Empty;
 		}
 	}
-
+	
 	public bool HasErrors => !IsValid;
 	public event EventHandler<DataErrorsChangedEventArgs>? ErrorsChanged;
 }
 
 sealed class TextBoxItem<T> : TextBoxItem {
 	public new T Item { get; }
-
+	
 	public TextBoxItem(T item) {
 		this.Item = item;
 		base.Item = item;

app/Desktop/Discord/DiscordAppSettings.cs

@@ -1,9 +1,9 @@
 using System;
-using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Runtime.InteropServices;
 using System.Text.Json;
+using System.Text.Json.Nodes;
 using System.Threading.Tasks;
 using DHT.Utils.Logging;
 using static System.Environment.SpecialFolder;
@@ -13,16 +13,16 @@ namespace DHT.Desktop.Discord;
 
 static class DiscordAppSettings {
 	private static readonly Log Log = Log.ForType(typeof(DiscordAppSettings));
-
+	
 	private const string JsonKeyDevTools = "DANGEROUS_ENABLE_DEVTOOLS_ONLY_ENABLE_IF_YOU_KNOW_WHAT_YOURE_DOING";
-
+	
 	public static string JsonFilePath { get; }
 	private static string JsonBackupFilePath { get; }
-
+	
 	[SuppressMessage("ReSharper", "ConvertIfStatementToConditionalTernaryExpression")]
 	static DiscordAppSettings() {
 		string rootFolder;
-
+		
 		if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
 			rootFolder = Path.Combine(Environment.GetFolderPath(ApplicationData, DoNotVerify), "Discord");
 		}
@@ -32,26 +32,28 @@ static class DiscordAppSettings {
 		else {
 			rootFolder = Path.Combine(Environment.GetFolderPath(ApplicationData, DoNotVerify), "discord");
 		}
-
+		
 		JsonFilePath = Path.Combine(rootFolder, "settings.json");
 		JsonBackupFilePath = JsonFilePath + ".bak";
 	}
-
+	
 	public static async Task<bool?> AreDevToolsEnabled() {
 		try {
-			return AreDevToolsEnabled(await ReadSettingsJson());
-		} catch (Exception) {
+			JsonObject settingsJson = await ReadSettingsJson();
+			return AreDevToolsEnabled(settingsJson);
+		} catch (Exception e) {
+			Log.Error("Could not read settings file.", e);
 			return null;
 		}
 	}
-
-	private static bool AreDevToolsEnabled(Dictionary<string, object?> json) {
-		return json.TryGetValue(JsonKeyDevTools, out var value) && value is JsonElement { ValueKind: JsonValueKind.True };
+	
+	private static bool AreDevToolsEnabled(JsonObject json) {
+		return json.TryGetPropertyValue(JsonKeyDevTools, out JsonNode? node) && node?.GetValueKind() == JsonValueKind.True;
 	}
-
+	
 	public static async Task<SettingsJsonResult> ConfigureDevTools(bool enable) {
-		Dictionary<string, object?> json;
-
+		JsonObject json;
+		
 		try {
 			json = await ReadSettingsJson();
 		} catch (FileNotFoundException) {
@@ -59,61 +61,58 @@ static class DiscordAppSettings {
 		} catch (JsonException) {
 			return SettingsJsonResult.InvalidJson;
 		} catch (Exception e) {
-			Log.Error(e);
+			Log.Error("Could not read settings file.", e);
 			return SettingsJsonResult.ReadError;
 		}
-
+		
 		if (enable == AreDevToolsEnabled(json)) {
 			return SettingsJsonResult.AlreadySet;
 		}
-
+		
 		if (enable) {
 			json[JsonKeyDevTools] = true;
 		}
 		else {
 			json.Remove(JsonKeyDevTools);
 		}
-
+		
 		try {
 			if (!File.Exists(JsonBackupFilePath)) {
 				File.Copy(JsonFilePath, JsonBackupFilePath);
 			}
-
+			
 			await WriteSettingsJson(json);
 		} catch (Exception e) {
-			Log.Error("An error occurred when writing settings file.");
-			Log.Error(e);
-
+			Log.Error("Could not write settings file.", e);
+			
 			if (File.Exists(JsonBackupFilePath)) {
 				try {
-					File.Move(JsonBackupFilePath, JsonFilePath, true);
+					File.Move(JsonBackupFilePath, JsonFilePath, overwrite: true);
 					Log.Info("Restored settings file from backup.");
 				} catch (Exception e2) {
-					Log.Error("Cannot restore settings file from backup.");
-					Log.Error(e2);
+					Log.Error("Could not restore settings file from backup.", e2);
 				}
 			}
-
+			
 			return SettingsJsonResult.WriteError;
 		}
-
+		
 		try {
 			File.Delete(JsonBackupFilePath);
 		} catch (Exception e) {
-			Log.Error("Cannot delete backup file.");
-			Log.Error(e);
+			Log.Error("Could not delete backup file.", e);
 		}
-
+		
 		return SettingsJsonResult.Success;
 	}
-
-	private static async Task<Dictionary<string, object?>> ReadSettingsJson() {
+	
+	private static async Task<JsonObject> ReadSettingsJson() {
 		await using var stream = new FileStream(JsonFilePath, FileMode.Open, FileAccess.Read, FileShare.Read);
-		return await JsonSerializer.DeserializeAsync<Dictionary<string, object?>?>(stream) ?? throw new JsonException();
+		return await JsonSerializer.DeserializeAsync(stream, DiscordAppSettingsJsonContext.Default.JsonObject) ?? throw new JsonException();
 	}
-
-	private static async Task WriteSettingsJson(Dictionary<string, object?> json) {
+	
+	private static async Task WriteSettingsJson(JsonObject json) {
 		await using var stream = new FileStream(JsonFilePath, FileMode.Truncate, FileAccess.Write, FileShare.None);
-		await JsonSerializer.SerializeAsync(stream, json, new JsonSerializerOptions { WriteIndented = true });
+		await JsonSerializer.SerializeAsync(stream, json, DiscordAppSettingsJsonContext.Default.JsonObject);
 	}
 }

app/Desktop/Discord/DiscordAppSettingsJsonContext.cs

@@ -0,0 +1,8 @@
+using System.Text.Json.Nodes;
+using System.Text.Json.Serialization;
+
+namespace DHT.Desktop.Discord;
+
+[JsonSourceGenerationOptions(GenerationMode = JsonSourceGenerationMode.Default, WriteIndented = true)]
+[JsonSerializable(typeof(JsonObject))]
+sealed partial class DiscordAppSettingsJsonContext : JsonSerializerContext;

app/Desktop/Discord/SettingsJsonResult.cs

@@ -6,5 +6,5 @@ enum SettingsJsonResult {
 	FileNotFound,
 	ReadError,
 	InvalidJson,
-	WriteError
+	WriteError,
 }

app/Desktop/Main/AboutWindow.axaml

@@ -0,0 +1,84 @@
+<Window xmlns="https://github.com/avaloniaui"
+        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"
+        xmlns:main="clr-namespace:DHT.Desktop.Main"
+        mc:Ignorable="d" d:DesignWidth="510" d:DesignHeight="425"
+        x:Class="DHT.Desktop.Main.AboutWindow"
+        x:DataType="main:AboutWindowModel"
+        Title="About Discord History Tracker"
+        Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
+        Width="510" Height="425" CanResize="False"
+        WindowStartupLocation="CenterOwner">
+
+    <Design.DataContext>
+        <main:AboutWindowModel />
+    </Design.DataContext>
+
+    <Window.Styles>
+        <Style Selector="TextBlock">
+            <Setter Property="TextWrapping" Value="Wrap" />
+            <Setter Property="VerticalAlignment" Value="Center" />
+        </Style>
+        <Style Selector="Grid > Button">
+            <Setter Property="Margin" Value="0 3" />
+            <Setter Property="Padding" Value="8 4" />
+            <Setter Property="HorizontalAlignment" Value="Stretch" />
+        </Style>
+    </Window.Styles>
+
+    <StackPanel Orientation="Vertical" Margin="20" Spacing="12">
+
+        <StackPanel Orientation="Vertical" Spacing="3">
+            <TextBlock TextWrapping="Wrap">Discord History Tracker was created by chylex.</TextBlock>
+            <TextBlock>It is available under the MIT license.</TextBlock>
+        </StackPanel>
+
+        <StackPanel Orientation="Horizontal" Spacing="8">
+            <Button Command="{Binding OpenOfficialWebsite}">Official Website</Button>
+            <Button Command="{Binding OpenIssueTracker}">Issue Tracker</Button>
+            <Button Command="{Binding OpenSourceCode}">Source Code</Button>
+        </StackPanel>
+
+        <Grid RowDefinitions="Auto,5,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto" ColumnDefinitions="*,115,90" Margin="0 10 0 0">
+            <TextBlock Grid.Row="0" Grid.Column="0" FontWeight="Bold">Third-Party Software</TextBlock>
+            <TextBlock Grid.Row="0" Grid.Column="1" FontWeight="Bold">License</TextBlock>
+            <TextBlock Grid.Row="0" Grid.Column="2" FontWeight="Bold">Link</TextBlock>
+
+            <TextBlock Grid.Row="2" Grid.Column="0">.NET</TextBlock>
+            <TextBlock Grid.Row="2" Grid.Column="1">MIT</TextBlock>
+            <Button Grid.Row="2" Grid.Column="2" Command="{Binding OpenThirdPartyNetCore}">GitHub</Button>
+
+            <TextBlock Grid.Row="3" Grid.Column="0">Avalonia</TextBlock>
+            <TextBlock Grid.Row="3" Grid.Column="1">MIT</TextBlock>
+            <Button Grid.Row="3" Grid.Column="2" Command="{Binding OpenThirdPartyAvalonia}">GitHub</Button>
+
+            <TextBlock Grid.Row="4" Grid.Column="0">Rx.NET</TextBlock>
+            <TextBlock Grid.Row="4" Grid.Column="1">MIT</TextBlock>
+            <Button Grid.Row="4" Grid.Column="2" Command="{Binding OpenThirdPartyRxNet}">GitHub</Button>
+
+            <TextBlock Grid.Row="5" Grid.Column="0">SQLite</TextBlock>
+            <TextBlock Grid.Row="5" Grid.Column="1">Public Domain</TextBlock>
+            <Button Grid.Row="5" Grid.Column="2" Command="{Binding OpenThirdPartySqlite}">Website</Button>
+
+            <TextBlock Grid.Row="6" Grid.Column="0">Microsoft.Data.Sqlite</TextBlock>
+            <TextBlock Grid.Row="6" Grid.Column="1">Apache-2.0</TextBlock>
+            <Button Grid.Row="6" Grid.Column="2" Command="{Binding OpenThirdPartyMicrosoftDataSqlite}">NuGet</Button>
+
+            <TextBlock Grid.Row="7" Grid.Column="0">PropertyChanged.SourceGenerator</TextBlock>
+            <TextBlock Grid.Row="7" Grid.Column="1">MIT</TextBlock>
+            <Button Grid.Row="7" Grid.Column="2" Command="{Binding OpenThirdPartyPropertyChangedSourceGenerator}">GitHub</Button>
+        </Grid>
+
+        <Grid RowDefinitions="Auto,5,Auto,Auto,Auto,Auto,Auto,Auto,Auto,Auto" ColumnDefinitions="*,115,90" Margin="0 5 0 0">
+            <TextBlock Grid.Row="0" Grid.Column="0" FontWeight="Bold">Additional Thanks</TextBlock>
+            <TextBlock Grid.Row="0" Grid.Column="1" FontWeight="Bold">License</TextBlock>
+            <TextBlock Grid.Row="0" Grid.Column="2" FontWeight="Bold">Link</TextBlock>
+
+            <TextBlock Grid.Row="2" Grid.Column="0">BetterDiscord, for Webpack hooks</TextBlock>
+            <TextBlock Grid.Row="2" Grid.Column="1">Apache-2.0</TextBlock>
+            <Button Grid.Row="2" Grid.Column="2" Command="{Binding OpenThirdPartyBetterDiscord}">GitHub</Button>
+        </Grid>
+
+    </StackPanel>
+</Window>

app/Desktop/Main/AboutWindow.axaml.cs

@@ -1,7 +1,7 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
 
-namespace DHT.Desktop.App.Windows;
+namespace DHT.Desktop.Main;
 
 [SuppressMessage("ReSharper", "MemberCanBeInternal")]
 public sealed partial class AboutWindow : Window {

app/Desktop/Main/AboutWindowModel.cs

@@ -0,0 +1,45 @@
+using DHT.Desktop.Common;
+
+namespace DHT.Desktop.Main;
+
+sealed class AboutWindowModel {
+	public void OpenOfficialWebsite() {
+		SystemUtils.OpenUrl(Program.Website);
+	}
+	
+	public void OpenIssueTracker() {
+		SystemUtils.OpenUrl("https://github.com/chylex/Discord-History-Tracker/issues");
+	}
+	
+	public void OpenSourceCode() {
+		SystemUtils.OpenUrl("https://github.com/chylex/Discord-History-Tracker");
+	}
+	
+	public void OpenThirdPartyNetCore() {
+		SystemUtils.OpenUrl("https://github.com/dotnet/core");
+	}
+	
+	public void OpenThirdPartyAvalonia() {
+		SystemUtils.OpenUrl("https://github.com/AvaloniaUI/Avalonia");
+	}
+	
+	public void OpenThirdPartyPropertyChangedSourceGenerator() {
+		SystemUtils.OpenUrl("https://github.com/canton7/PropertyChanged.SourceGenerator");
+	}
+	
+	public void OpenThirdPartySqlite() {
+		SystemUtils.OpenUrl("https://www.sqlite.org");
+	}
+	
+	public void OpenThirdPartyMicrosoftDataSqlite() {
+		SystemUtils.OpenUrl("https://www.nuget.org/packages/Microsoft.Data.Sqlite");
+	}
+	
+	public void OpenThirdPartyRxNet() {
+		SystemUtils.OpenUrl("https://github.com/dotnet/reactive");
+	}
+	
+	public void OpenThirdPartyBetterDiscord() {
+		SystemUtils.OpenUrl("https://github.com/BetterDiscord/BetterDiscord");
+	}
+}

app/Desktop/Main/Controls/DownloadItemFilterPanel.axaml

@@ -0,0 +1,48 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             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"
+             xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
+             mc:Ignorable="d"
+             x:Class="DHT.Desktop.Main.Controls.DownloadItemFilterPanel"
+             x:DataType="controls:DownloadItemFilterPanelModel">
+
+    <Design.DataContext>
+        <controls:DownloadItemFilterPanelModel />
+    </Design.DataContext>
+
+    <UserControl.Styles>
+        <Style Selector="WrapPanel > StackPanel">
+            <Setter Property="Spacing" Value="4" />
+        </Style>
+        <Style Selector="Grid > Label">
+            <Setter Property="VerticalAlignment" Value="Center" />
+        </Style>
+        <Style Selector="ComboBox">
+            <Setter Property="Margin" Value="8 0 0 0" />
+        </Style>
+        <Style Selector="Button">
+            <Setter Property="Margin" Value="0 0 0 8" />
+        </Style>
+    </UserControl.Styles>
+
+    <StackPanel Spacing="20">
+        <TextBlock Text="{Binding FilterStatisticsText}" />
+        <WrapPanel ItemSpacing="40" LineSpacing="20">
+            <StackPanel>
+                <CheckBox IsChecked="{Binding LimitSize}">Limit Size</CheckBox>
+                <StackPanel Orientation="Horizontal">
+                    <TextBox Text="{Binding MaximumSize}" IsEnabled="{Binding LimitSize}" HorizontalContentAlignment="Right" />
+                    <ComboBox IsEnabled="{Binding LimitSize}" ItemsSource="{Binding Units}" SelectedItem="{Binding MaximumSizeUnit}">
+                        <ComboBox.ItemTemplate>
+                            <DataTemplate>
+                                <TextBlock Text="{Binding Name}" />
+                            </DataTemplate>
+                        </ComboBox.ItemTemplate>
+                    </ComboBox>
+                </StackPanel>
+            </StackPanel>
+        </WrapPanel>
+    </StackPanel>
+
+</UserControl>

app/Desktop/Main/Controls/DownloadItemFilterPanel.axaml.cs

@@ -0,0 +1,11 @@
+using System.Diagnostics.CodeAnalysis;
+using Avalonia.Controls;
+
+namespace DHT.Desktop.Main.Controls;
+
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class DownloadItemFilterPanel : UserControl {
+	public DownloadItemFilterPanel() {
+		InitializeComponent();
+	}
+}

app/Desktop/Main/Controls/DownloadItemFilterPanelModel.cs

@@ -0,0 +1,170 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Reactive.Linq;
+using System.Threading.Tasks;
+using Avalonia.ReactiveUI;
+using DHT.Desktop.Common;
+using DHT.Server;
+using DHT.Server.Data.Filters;
+using DHT.Server.Data.Settings;
+using DHT.Utils.Logging;
+using DHT.Utils.Tasks;
+using PropertyChanged.SourceGenerator;
+
+namespace DHT.Desktop.Main.Controls;
+
+sealed partial class DownloadItemFilterPanelModel : IAsyncDisposable {
+	private static readonly Log Log = Log.ForType<DownloadItemFilterPanelModel>();
+	
+	public sealed record Unit(string Name, uint Scale);
+	
+	private static readonly Unit[] AllUnits = [
+		new Unit("B", Scale: 1),
+		new Unit("kB", Scale: 1024),
+		new Unit("MB", Scale: 1024 * 1024)
+	];
+	
+	private static readonly HashSet<string> FilterProperties = [
+		nameof(LimitSize),
+		nameof(MaximumSize),
+		nameof(MaximumSizeUnit),
+	];
+	
+	[Notify(Setter.Private)]
+	private string filterStatisticsText = "";
+	
+	[Notify]
+	private bool limitSize = false;
+	
+	[Notify]
+	private ulong maximumSize = 0UL;
+	
+	[Notify]
+	private Unit maximumSizeUnit = AllUnits[0];
+	
+	public IEnumerable<Unit> Units => AllUnits;
+	
+	private readonly State state;
+	private readonly string verb;
+	
+	private readonly DelayedThrottledTask<FilterSettings> saveFilterSettingsTask;
+	private bool isLoadingFilterSettings;
+	
+	private readonly RestartableTask<long> downloadItemCountTask;
+	private long? matchingItemCount;
+	
+	private readonly IDisposable downloadItemCountSubscription;
+	private long? totalItemCount;
+	
+	[Obsolete("Designer")]
+	public DownloadItemFilterPanelModel() : this(State.Dummy) {}
+	
+	public DownloadItemFilterPanelModel(State state, string verb = "Matches") {
+		this.state = state;
+		this.verb = verb;
+		
+		this.saveFilterSettingsTask = new DelayedThrottledTask<FilterSettings>(Log, TimeSpan.FromSeconds(5), SaveFilterSettings);
+		
+		this.downloadItemCountTask = new RestartableTask<long>(SetMatchingCount, TaskScheduler.FromCurrentSynchronizationContext());
+		this.downloadItemCountSubscription = state.Db.Downloads.TotalCount.ObserveOn(AvaloniaScheduler.Instance).Subscribe(OnDownloadItemCountChanged);
+		
+		UpdateFilterStatistics();
+		
+		PropertyChanged += OnPropertyChanged;
+	}
+	
+	public async Task Initialize() {
+		isLoadingFilterSettings = true;
+		
+		LimitSize = await state.Db.Settings.Get(SettingsKey.DownloadsLimitSize, LimitSize);
+		MaximumSize = await state.Db.Settings.Get(SettingsKey.DownloadsMaximumSize, MaximumSize);
+		
+		if (await state.Db.Settings.Get(SettingsKey.DownloadsMaximumSizeUnit, defaultValue: null) is {} unitName && AllUnits.FirstOrDefault(unit => unit.Name == unitName) is {} unitValue) {
+			MaximumSizeUnit = unitValue;
+		}
+		
+		isLoadingFilterSettings = false;
+	}
+	
+	public async ValueTask DisposeAsync() {
+		saveFilterSettingsTask.Dispose();
+		
+		downloadItemCountTask.Cancel();
+		downloadItemCountSubscription.Dispose();
+		
+		await SaveFilterSettings(new FilterSettings(this));
+	}
+	
+	private sealed record FilterSettings(bool LimitSize, ulong MaximumSize, Unit MaximumSizeUnit) {
+		public FilterSettings(DownloadItemFilterPanelModel model) : this(model.LimitSize, model.MaximumSize, model.MaximumSizeUnit) {}
+	}
+	
+	private async Task SaveFilterSettings(FilterSettings settings) {
+		try {
+			await state.Db.Settings.Set(async setter => {
+				await setter.Set(SettingsKey.DownloadsLimitSize, settings.LimitSize);
+				await setter.Set(SettingsKey.DownloadsMaximumSize, settings.MaximumSize);
+				await setter.Set(SettingsKey.DownloadsMaximumSizeUnit, settings.MaximumSizeUnit.Name);
+			});
+		} catch (Exception e) {
+			Log.Error("Could not save download filter settings.", e);
+		}
+	}
+	
+	private void OnPropertyChanged(object? sender, PropertyChangedEventArgs e) {
+		if (e.PropertyName != null && FilterProperties.Contains(e.PropertyName)) {
+			if (!isLoadingFilterSettings) {
+				saveFilterSettingsTask.Post(new FilterSettings(this));
+			}
+			
+			UpdateFilterStatistics();
+		}
+	}
+	
+	private void OnDownloadItemCountChanged(long newItemCount) {
+		totalItemCount = newItemCount;
+		UpdateFilterStatistics();
+	}
+	
+	
+	private void UpdateFilterStatistics() {
+		DownloadItemFilter filter = CreateFilter();
+		if (filter.IsEmpty) {
+			downloadItemCountTask.Cancel();
+			matchingItemCount = totalItemCount;
+			UpdateFilterStatisticsText();
+		}
+		else {
+			matchingItemCount = null;
+			UpdateFilterStatisticsText();
+			downloadItemCountTask.Restart(cancellationToken => state.Db.Downloads.Count(filter, cancellationToken));
+		}
+	}
+	
+	private void SetMatchingCount(long matchingAttachmentCount) {
+		this.matchingItemCount = matchingAttachmentCount;
+		UpdateFilterStatisticsText();
+	}
+	
+	private void UpdateFilterStatisticsText() {
+		string matchingItemCountStr = matchingItemCount?.Format() ?? "(...)";
+		string totalItemCountStr = totalItemCount?.Format() ?? "(...)";
+		FilterStatisticsText = verb + " " + matchingItemCountStr + " out of " + totalItemCountStr + " file" + (totalItemCount is null or 1 ? "." : "s.");
+	}
+	
+	public DownloadItemFilter CreateFilter() {
+		DownloadItemFilter filter = new ();
+		
+		if (LimitSize) {
+			try {
+				filter.MaxBytes = maximumSize * maximumSizeUnit.Scale;
+			} catch (ArithmeticException) {
+				// set no size limit, because the overflown size is larger than any file could possibly be
+			}
+		}
+		
+		return filter;
+	}
+}

app/Desktop/Main/Controls/MessageFilterPanel.axaml

@@ -0,0 +1,60 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             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"
+             xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
+             mc:Ignorable="d"
+             x:Class="DHT.Desktop.Main.Controls.MessageFilterPanel"
+             x:DataType="controls:MessageFilterPanelModel">
+
+    <Design.DataContext>
+        <controls:MessageFilterPanelModel />
+    </Design.DataContext>
+
+    <UserControl.Styles>
+        <Style Selector="WrapPanel > StackPanel">
+            <Setter Property="Spacing" Value="4" />
+        </Style>
+        <Style Selector="Grid > Label">
+            <Setter Property="VerticalAlignment" Value="Center" />
+        </Style>
+        <Style Selector="Grid > CalendarDatePicker">
+            <Setter Property="CornerRadius" Value="0" />
+            <Setter Property="HorizontalAlignment" Value="Stretch" />
+            <Setter Property="HorizontalContentAlignment" Value="Center" />
+            <Setter Property="VerticalAlignment" Value="Center" />
+            <Setter Property="VerticalContentAlignment" Value="Center" />
+            <Setter Property="IsTodayHighlighted" Value="True" />
+            <Setter Property="SelectedDateFormat" Value="Short" />
+        </Style>
+        <Style Selector="Button">
+            <Setter Property="Margin" Value="0 0 0 8" />
+        </Style>
+    </UserControl.Styles>
+
+    <StackPanel Spacing="20">
+        <TextBlock Text="{Binding FilterStatisticsText}" />
+        <WrapPanel ItemSpacing="40" LineSpacing="20">
+            <StackPanel>
+                <CheckBox IsChecked="{Binding FilterByDate}">Filter by Date</CheckBox>
+                <Grid ColumnDefinitions="Auto, 4, 125" RowDefinitions="Auto, 4, Auto" Margin="4 0">
+                    <Label Grid.Row="0" Grid.Column="0">From:</Label>
+                    <CalendarDatePicker Grid.Row="0" Grid.Column="2" x:Name="StartDatePicker" IsEnabled="{Binding FilterByDate}" SelectedDateChanged="CalendarDatePicker_OnSelectedDateChanged" />
+                    <Label Grid.Row="2" Grid.Column="0">To:</Label>
+                    <CalendarDatePicker Grid.Row="2" Grid.Column="2" x:Name="EndDatePicker" IsEnabled="{Binding FilterByDate}" SelectedDateChanged="CalendarDatePicker_OnSelectedDateChanged" />
+                </Grid>
+            </StackPanel>
+            <StackPanel>
+                <CheckBox IsChecked="{Binding FilterByChannel}">Filter by Channel</CheckBox>
+                <Button Command="{Binding OpenChannelFilterDialog}" IsEnabled="{Binding FilterByChannel}">Select Channels...</Button>
+                <TextBlock Text="{Binding ChannelFilterLabel}" />
+            </StackPanel>
+            <StackPanel>
+                <CheckBox IsChecked="{Binding FilterByUser}">Filter by User</CheckBox>
+                <Button Command="{Binding OpenUserFilterDialog}" IsEnabled="{Binding FilterByUser}">Select Users...</Button>
+                <TextBlock Text="{Binding UserFilterLabel}" />
+            </StackPanel>
+        </WrapPanel>
+    </StackPanel>
+
+</UserControl>

app/Desktop/Main/Controls/MessageFilterPanel.axaml.cs

@@ -0,0 +1,27 @@
+using System.Diagnostics.CodeAnalysis;
+using System.Globalization;
+using Avalonia.Controls;
+
+namespace DHT.Desktop.Main.Controls;
+
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class MessageFilterPanel : UserControl {
+	public MessageFilterPanel() {
+		InitializeComponent();
+		
+		CultureInfo culture = Program.Culture;
+		foreach (CalendarDatePicker picker in new CalendarDatePicker[] { StartDatePicker, EndDatePicker }) {
+			picker.FirstDayOfWeek = culture.DateTimeFormat.FirstDayOfWeek;
+			picker.SelectedDateFormat = CalendarDatePickerFormat.Custom;
+			picker.CustomDateFormatString = culture.DateTimeFormat.ShortDatePattern;
+			picker.Watermark = culture.DateTimeFormat.ShortDatePattern;
+		}
+	}
+	
+	public void CalendarDatePicker_OnSelectedDateChanged(object? sender, SelectionChangedEventArgs e) {
+		if (DataContext is MessageFilterPanelModel model) {
+			model.StartDate = StartDatePicker.SelectedDate;
+			model.EndDate = EndDatePicker.SelectedDate;
+		}
+	}
+}

app/Desktop/Main/Controls/MessageFilterPanelModel.cs

@@ -0,0 +1,324 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.Immutable;
+using System.ComponentModel;
+using System.Diagnostics.CodeAnalysis;
+using System.Linq;
+using System.Reactive.Linq;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.ReactiveUI;
+using DHT.Desktop.Common;
+using DHT.Desktop.Dialogs.CheckBox;
+using DHT.Desktop.Dialogs.Message;
+using DHT.Desktop.Dialogs.Progress;
+using DHT.Server;
+using DHT.Server.Data;
+using DHT.Server.Data.Filters;
+using DHT.Utils.Tasks;
+using PropertyChanged.SourceGenerator;
+
+namespace DHT.Desktop.Main.Controls;
+
+sealed partial class MessageFilterPanelModel : IDisposable {
+	private static readonly HashSet<string> FilterProperties = [
+		nameof(FilterByDate),
+		nameof(StartDate),
+		nameof(EndDate),
+		nameof(FilterByChannel),
+		nameof(IncludedChannels),
+		nameof(FilterByUser),
+		nameof(IncludedUsers),
+	];
+	
+	public event PropertyChangedEventHandler? FilterPropertyChanged;
+	
+	public bool HasAnyFilters => FilterByDate || FilterByChannel || FilterByUser;
+	
+	[Notify]
+	private string filterStatisticsText = "";
+	
+	[Notify]
+	private bool filterByDate = false;
+	
+	[Notify]
+	private DateTime? startDate = null;
+	
+	[Notify]
+	private DateTime? endDate = null;
+	
+	[Notify]
+	private bool filterByChannel = false;
+	
+	[Notify]
+	private HashSet<ulong>? includedChannels = null;
+	
+	[Notify]
+	private bool filterByUser = false;
+	
+	[Notify]
+	private HashSet<ulong>? includedUsers = null;
+	
+	[Notify]
+	private string channelFilterLabel = "";
+	
+	[Notify]
+	private string userFilterLabel = "";
+	
+	private readonly Window window;
+	private readonly State state;
+	private readonly string verb;
+	
+	private readonly RestartableTask<long> exportedMessageCountTask;
+	private long? exportedMessageCount;
+	
+	private readonly IDisposable messageCountSubscription;
+	private long? totalMessageCount;
+	
+	private readonly IDisposable channelCountSubscription;
+	private long? totalChannelCount;
+	
+	private readonly IDisposable userCountSubscription;
+	private long? totalUserCount;
+	
+	[Obsolete("Designer")]
+	public MessageFilterPanelModel() : this(null!, State.Dummy) {}
+	
+	public MessageFilterPanelModel(Window window, State state, string verb = "Matches") {
+		this.window = window;
+		this.state = state;
+		this.verb = verb;
+		
+		this.exportedMessageCountTask = new RestartableTask<long>(SetExportedMessageCount, TaskScheduler.FromCurrentSynchronizationContext());
+		
+		this.messageCountSubscription = state.Db.Messages.TotalCount.ObserveOn(AvaloniaScheduler.Instance).Subscribe(OnMessageCountChanged);
+		this.channelCountSubscription = state.Db.Channels.TotalCount.ObserveOn(AvaloniaScheduler.Instance).Subscribe(OnChannelCountChanged);
+		this.userCountSubscription = state.Db.Users.TotalCount.ObserveOn(AvaloniaScheduler.Instance).Subscribe(OnUserCountChanged);
+		
+		UpdateFilterStatistics();
+		UpdateChannelFilterLabel();
+		UpdateUserFilterLabel();
+		
+		PropertyChanged += OnPropertyChanged;
+	}
+	
+	public void Dispose() {
+		exportedMessageCountTask.Cancel();
+		
+		messageCountSubscription.Dispose();
+		channelCountSubscription.Dispose();
+		userCountSubscription.Dispose();
+	}
+	
+	private void OnPropertyChanged(object? sender, PropertyChangedEventArgs e) {
+		if (e.PropertyName != null && FilterProperties.Contains(e.PropertyName)) {
+			UpdateFilterStatistics();
+			FilterPropertyChanged?.Invoke(sender, e);
+		}
+		
+		if (e.PropertyName is nameof(FilterByChannel) or nameof(IncludedChannels)) {
+			UpdateChannelFilterLabel();
+		}
+		else if (e.PropertyName is nameof(FilterByUser) or nameof(IncludedUsers)) {
+			UpdateUserFilterLabel();
+		}
+	}
+	
+	private void OnMessageCountChanged(long newMessageCount) {
+		totalMessageCount = newMessageCount;
+		UpdateFilterStatistics();
+	}
+	
+	private void OnChannelCountChanged(long newChannelCount) {
+		totalChannelCount = newChannelCount;
+		UpdateChannelFilterLabel();
+	}
+	
+	private void OnUserCountChanged(long newUserCount) {
+		totalUserCount = newUserCount;
+		UpdateUserFilterLabel();
+	}
+	
+	private void UpdateChannelFilterLabel() {
+		if (totalChannelCount.HasValue) {
+			long total = totalChannelCount.Value;
+			long included = FilterByChannel && IncludedChannels != null ? IncludedChannels.Count : total;
+			ChannelFilterLabel = "Selected " + included.Format() + " / " + total.Pluralize("channel") + ".";
+		}
+		else {
+			ChannelFilterLabel = "Loading...";
+		}
+	}
+	
+	private void UpdateUserFilterLabel() {
+		if (totalUserCount.HasValue) {
+			long total = totalUserCount.Value;
+			long included = FilterByUser && IncludedUsers != null ? IncludedUsers.Count : total;
+			UserFilterLabel = "Selected " + included.Format() + " / " + total.Pluralize("user") + ".";
+		}
+		else {
+			UserFilterLabel = "Loading...";
+		}
+	}
+	
+	private void UpdateFilterStatistics() {
+		MessageFilter filter = CreateFilter();
+		if (filter.IsEmpty) {
+			exportedMessageCountTask.Cancel();
+			exportedMessageCount = totalMessageCount;
+			UpdateFilterStatisticsText();
+		}
+		else {
+			exportedMessageCount = null;
+			UpdateFilterStatisticsText();
+			exportedMessageCountTask.Restart(cancellationToken => state.Db.Messages.Count(filter, cancellationToken));
+		}
+	}
+	
+	private void SetExportedMessageCount(long exportedMessageCount) {
+		this.exportedMessageCount = exportedMessageCount;
+		UpdateFilterStatisticsText();
+	}
+	
+	private void UpdateFilterStatisticsText() {
+		string exportedMessageCountStr = exportedMessageCount?.Format() ?? "(...)";
+		string totalMessageCountStr = totalMessageCount?.Format() ?? "(...)";
+		FilterStatisticsText = verb + " " + exportedMessageCountStr + " out of " + totalMessageCountStr + " message" + (totalMessageCount is null or 1 ? "." : "s.");
+	}
+	
+	[SuppressMessage("ReSharper", "NotAccessedPositionalProperty.Local")]
+	[SuppressMessage("ReSharper", "MemberCanBePrivate.Local")]
+	private readonly record struct ChannelFilterKey(byte Type, ulong? ServerId, string Title) : IComparable<ChannelFilterKey> {
+		public static ChannelFilterKey DirectMessages { get; } = new (Type: 1, ServerId: null, Title: "Direct Messages");
+		public static ChannelFilterKey GroupMessages { get; } = new (Type: 2, ServerId: null, Title: "Group Messages");
+		public static ChannelFilterKey Unknown { get; } = new (Type: 4, ServerId: null, Title: "Unknown");
+		
+		public static ChannelFilterKey For(DHT.Server.Data.Server server) {
+			return server.Type switch {
+				ServerType.Server        => new ChannelFilterKey(Type: 3, server.Id, "Server - " + server.Name),
+				ServerType.Group         => GroupMessages,
+				ServerType.DirectMessage => DirectMessages,
+				_                        => Unknown,
+			};
+		}
+		
+		public bool Equals(ChannelFilterKey other) {
+			return Type == other.Type && ServerId == other.ServerId;
+		}
+		
+		public override int GetHashCode() {
+			return HashCode.Combine(Type, ServerId);
+		}
+		
+		public int CompareTo(ChannelFilterKey other) {
+			int result = Type.CompareTo(other.Type);
+			if (result != 0) {
+				return result;
+			}
+			else {
+				return Title.CompareTo(other.Title);
+			}
+		}
+	}
+	
+	public async Task OpenChannelFilterDialog() {
+		async Task<ImmutableArray<ICheckBoxItem>> PrepareChannelItems(ProgressDialog dialog) {
+			CheckBoxItemList<ChannelFilterKey, ulong> items = new CheckBoxItemList<ChannelFilterKey, ulong>();
+			Dictionary<ulong, DHT.Server.Data.Server> servers = await state.Db.Servers.Get().ToDictionaryAsync(static server => server.Id);
+			
+			foreach (ChannelFilterKey channelFilterKey in servers.Values.Select(ChannelFilterKey.For).Order()) {
+				items.AddParent(channelFilterKey, channelFilterKey.Title);
+			}
+			
+			await foreach (Channel channel in state.Db.Channels.Get().OrderBy(static channel => channel.Position ?? int.MinValue).ThenBy(static channel => channel.Name)) {
+				ChannelFilterKey key = servers.TryGetValue(channel.Server, out var server)
+					                       ? ChannelFilterKey.For(server)
+					                       : ChannelFilterKey.Unknown;
+				
+				items.Add(key, channel.Id, channel.Name, isChecked: IncludedChannels == null || IncludedChannels.Contains(channel.Id));
+			}
+			
+			return items.ToCheckBoxItems();
+		}
+		
+		const string Title = "Included Channels";
+		
+		ImmutableArray<ICheckBoxItem> items;
+		try {
+			items = await ProgressDialog.ShowIndeterminate(window, Title, "Loading channels...", PrepareChannelItems);
+		} catch (Exception e) {
+			await Dialog.ShowOk(window, Title, "Error loading channels: " + e.Message);
+			return;
+		}
+		
+		HashSet<ulong>? result = await OpenIdFilterDialog(Title, items);
+		if (result != null) {
+			IncludedChannels = result;
+		}
+	}
+	
+	public async Task OpenUserFilterDialog() {
+		async Task<ImmutableArray<ICheckBoxItem>> PrepareUserItems(ProgressDialog dialog) {
+			CheckBoxItemList<ulong, ulong> items = new CheckBoxItemList<ulong, ulong>();
+			
+			static string GetDisplayName(User user) {
+				return user.DisplayName == null ? user.Name : $"{user.DisplayName} ({user.Name})";
+			}
+			
+			await foreach ((ulong id, string name) in state.Db.Users.Get().Select(static user => (user.Id, GetDisplayName(user))).OrderBy(static pair => pair.Item2)) {
+				items.Add(
+					value: id,
+					title: name,
+					isChecked: IncludedUsers == null || IncludedUsers.Contains(id)
+				);
+			}
+			
+			return items.ToCheckBoxItems();
+		}
+		
+		const string Title = "Included Users";
+		
+		ImmutableArray<ICheckBoxItem> items;
+		try {
+			items = await ProgressDialog.ShowIndeterminate(window, Title, "Loading users...", PrepareUserItems);
+		} catch (Exception e) {
+			await Dialog.ShowOk(window, Title, "Error loading users: " + e.Message);
+			return;
+		}
+		
+		HashSet<ulong>? result = await OpenIdFilterDialog(Title, items);
+		if (result != null) {
+			IncludedUsers = result;
+		}
+	}
+	
+	private async Task<HashSet<ulong>?> OpenIdFilterDialog(string title, ImmutableArray<ICheckBoxItem> items) {
+		var model = new CheckBoxDialogModel<ulong>(items) {
+			Title = title,
+		};
+		
+		var dialog = new CheckBoxDialog { DataContext = model };
+		var result = await dialog.ShowDialog<DialogResult.OkCancel>(window);
+		
+		return result == DialogResult.OkCancel.Ok ? model.SelectedValues.ToHashSet() : null;
+	}
+	
+	public MessageFilter CreateFilter() {
+		MessageFilter filter = new ();
+		
+		if (FilterByDate) {
+			filter.StartDate = StartDate;
+			filter.EndDate = EndDate?.AddDays(1).AddMilliseconds(-1);
+		}
+		
+		if (FilterByChannel && IncludedChannels != null) {
+			filter.ChannelIds = new HashSet<ulong>(IncludedChannels);
+		}
+		
+		if (FilterByUser && IncludedUsers != null) {
+			filter.UserIds = new HashSet<ulong>(IncludedUsers);
+		}
+		
+		return filter;
+	}
+}

app/Desktop/Main/Controls/ServerConfigurationPanel.axaml

@@ -2,9 +2,10 @@
              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"
-             xmlns:controls="clr-namespace:DHT.Desktop.App.Controls"
+             xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
              mc:Ignorable="d"
-             x:Class="DHT.Desktop.App.Controls.ServerConfigurationPanel">
+             x:Class="DHT.Desktop.Main.Controls.ServerConfigurationPanel"
+             x:DataType="controls:ServerConfigurationPanelModel">
 
     <Design.DataContext>
         <controls:ServerConfigurationPanelModel />
@@ -15,18 +16,21 @@
             <Setter Property="FontFamily" Value="Consolas,Courier" />
             <Setter Property="FontSize" Value="15" />
         </Style>
+        <Style Selector="Label">
+            <Setter Property="Margin" Value="0 5" />
+            <Setter Property="Padding" Value="0" />
+        </Style>
         <Style Selector="WrapPanel > StackPanel">
             <Setter Property="Orientation" Value="Vertical" />
-            <Setter Property="Margin" Value="0 0 10 10" />
         </Style>
     </UserControl.Styles>
 
-    <StackPanel>
+    <StackPanel Spacing="10">
         <Button Command="{Binding OnClickToggleServerButton}" Content="{Binding ToggleServerButtonText}" IsEnabled="{Binding IsToggleServerButtonEnabled}" />
-        <TextBlock TextWrapping="Wrap" Margin="0 15">
-            The following settings determine how the tracking script communicates with this application. If you change them, you will have to copy/paste the tracking script again.
+        <TextBlock TextWrapping="Wrap" Margin="0 5">
+            The following settings determine how the tracking script communicates with this application. If you change them, you will have to copy/paste the tracking script or connection code again.
         </TextBlock>
-        <WrapPanel>
+        <WrapPanel ItemSpacing="10" LineSpacing="10">
             <StackPanel>
                 <Label Target="Port">Port</Label>
                 <TextBox x:Name="Port" Width="70" Text="{Binding InputPort}" />

app/Desktop/Main/Controls/ServerConfigurationPanel.axaml.cs

@@ -1,7 +1,7 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
 
-namespace DHT.Desktop.App.Controls;
+namespace DHT.Desktop.Main.Controls;
 
 [SuppressMessage("ReSharper", "MemberCanBeInternal")]
 public sealed partial class ServerConfigurationPanel : UserControl {

app/Desktop/Main/Controls/ServerConfigurationPanelModel.cs

@@ -0,0 +1,118 @@
+using System;
+using System.ComponentModel;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Threading;
+using DHT.Desktop.Dialogs.Message;
+using DHT.Desktop.Server;
+using DHT.Server;
+using DHT.Server.Service;
+using DHT.Utils.Logging;
+using PropertyChanged.SourceGenerator;
+
+namespace DHT.Desktop.Main.Controls;
+
+sealed partial class ServerConfigurationPanelModel : IDisposable {
+	private static readonly Log Log = Log.ForType<ServerConfigurationPanelModel>();
+	
+	[Notify]
+	private string inputPort;
+	
+	[Notify]
+	private string inputToken;
+	
+	[DependsOn(nameof(InputPort), nameof(InputToken))]
+	public bool HasMadeChanges => ServerConfiguration.Port.ToString() != InputPort || ServerConfiguration.Token != InputToken;
+	
+	[Notify(Setter.Private)]
+	private bool isToggleServerButtonEnabled = true;
+	
+	public string ToggleServerButtonText => server.IsRunning ? "Stop Server" : "Start Server";
+	
+	private readonly Window window;
+	private readonly ServerManager server;
+	
+	[Obsolete("Designer")]
+	public ServerConfigurationPanelModel() : this(null!, State.Dummy) {}
+	
+	public ServerConfigurationPanelModel(Window window, State state) {
+		this.window = window;
+		this.server = state.Server;
+		this.inputPort = ServerConfiguration.Port.ToString();
+		this.inputToken = ServerConfiguration.Token;
+		
+		server.StatusChanged += OnServerStatusChanged;
+	}
+	
+	public void Dispose() {
+		server.StatusChanged -= OnServerStatusChanged;
+	}
+	
+	private void OnServerStatusChanged(object? sender, ServerManager.Status e) {
+		Dispatcher.UIThread.InvokeAsync(UpdateServerStatus);
+	}
+	
+	private void UpdateServerStatus() {
+		OnPropertyChanged(new PropertyChangedEventArgs(nameof(ToggleServerButtonText)));
+	}
+	
+	private async Task StartServer() {
+		IsToggleServerButtonEnabled = false;
+		
+		try {
+			await server.Start(ServerConfiguration.Port, ServerConfiguration.Token);
+		} catch (Exception e) {
+			Log.Error("Could not start internal server.", e);
+			await Dialog.ShowOk(window, "Internal Server Error", e.Message);
+		}
+		
+		UpdateServerStatus();
+		IsToggleServerButtonEnabled = true;
+	}
+	
+	private async Task StopServer() {
+		IsToggleServerButtonEnabled = false;
+		
+		try {
+			await server.Stop();
+		} catch (Exception e) {
+			Log.Error("Could not stop internal server.", e);
+			await Dialog.ShowOk(window, "Internal Server Error", e.Message);
+		}
+		
+		UpdateServerStatus();
+		IsToggleServerButtonEnabled = true;
+	}
+	
+	public async Task OnClickToggleServerButton() {
+		if (server.IsRunning) {
+			await StopServer();
+		}
+		else {
+			await StartServer();
+		}
+	}
+	
+	public void OnClickRandomizeToken() {
+		InputToken = ServerUtils.GenerateRandomToken(20);
+	}
+	
+	public async Task OnClickApplyChanges() {
+		if (!ushort.TryParse(InputPort, out ushort port)) {
+			await Dialog.ShowOk(window, "Invalid Port", "Port must be a number between 0 and 65535.");
+			return;
+		}
+		
+		ServerConfiguration.Port = port;
+		ServerConfiguration.Token = inputToken;
+		
+		OnPropertyChanged(new PropertyChangedEventArgs(nameof(HasMadeChanges)));
+		
+		await StartServer();
+	}
+	
+	public void OnClickCancelChanges() {
+		InputPort = ServerConfiguration.Port.ToString();
+		InputToken = ServerConfiguration.Token;
+	}
+}

app/Desktop/Main/Controls/StatusBar.axaml

@@ -2,9 +2,10 @@
              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"
-             xmlns:controls="clr-namespace:DHT.Desktop.App.Controls"
+             xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
              mc:Ignorable="d"
-             x:Class="DHT.Desktop.App.Controls.StatusBar">
+             x:Class="DHT.Desktop.Main.Controls.StatusBar"
+             x:DataType="controls:StatusBarModel">
 
     <Design.DataContext>
         <controls:StatusBarModel />
@@ -39,22 +40,22 @@
     <StackPanel Orientation="Horizontal" Margin="6 3">
         <StackPanel Orientation="Vertical" Width="65">
             <TextBlock Classes="label">Status</TextBlock>
-            <TextBlock FontSize="12" Margin="0 3 0 0" Text="{Binding StatusText}" />
+            <TextBlock FontSize="12" Margin="0 3 0 0" Text="{Binding ServerStatusText}" />
         </StackPanel>
         <Rectangle />
         <StackPanel Orientation="Vertical">
             <TextBlock Classes="label">Servers</TextBlock>
-            <TextBlock Classes="value" Text="{Binding DatabaseStatistics.TotalServers, Converter={StaticResource NumberValueConverter}}" />
+            <TextBlock Classes="value" Text="{Binding ServerCount, Mode=OneWay, Converter={StaticResource NumberValueConverter}}" />
         </StackPanel>
         <Rectangle />
         <StackPanel Orientation="Vertical">
             <TextBlock Classes="label">Channels</TextBlock>
-            <TextBlock Classes="value" Text="{Binding DatabaseStatistics.TotalChannels, Converter={StaticResource NumberValueConverter}}" />
+            <TextBlock Classes="value" Text="{Binding ChannelCount, Mode=OneWay, Converter={StaticResource NumberValueConverter}}" />
         </StackPanel>
         <Rectangle />
         <StackPanel Orientation="Vertical">
             <TextBlock Classes="label">Messages</TextBlock>
-            <TextBlock Classes="value" Text="{Binding DatabaseStatistics.TotalMessages, Converter={StaticResource NumberValueConverter}}" />
+            <TextBlock Classes="value" Text="{Binding MessageCount, Mode=OneWay, Converter={StaticResource NumberValueConverter}}" />
         </StackPanel>
     </StackPanel>
 

app/Desktop/Main/Controls/StatusBar.axaml.cs

@@ -1,7 +1,7 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
 
-namespace DHT.Desktop.App.Controls;
+namespace DHT.Desktop.Main.Controls;
 
 [SuppressMessage("ReSharper", "MemberCanBeInternal")]
 public sealed partial class StatusBar : UserControl {

app/Desktop/Main/Controls/StatusBarModel.cs

@@ -0,0 +1,63 @@
+using System;
+using System.Reactive.Linq;
+using Avalonia.ReactiveUI;
+using Avalonia.Threading;
+using DHT.Server;
+using DHT.Server.Service;
+using PropertyChanged.SourceGenerator;
+
+namespace DHT.Desktop.Main.Controls;
+
+sealed partial class StatusBarModel : IDisposable {
+	[Notify(Setter.Private)]
+	private long? serverCount;
+	
+	[Notify(Setter.Private)]
+	private long? channelCount;
+	
+	[Notify(Setter.Private)]
+	private long? messageCount;
+	
+	[Notify(Setter.Private)]
+	private ServerManager.Status serverStatus;
+	
+	[DependsOn(nameof(ServerStatus))]
+	public string ServerStatusText => ServerStatus switch {
+		ServerManager.Status.Starting => "STARTING",
+		ServerManager.Status.Started  => "READY",
+		ServerManager.Status.Stopping => "STOPPING",
+		ServerManager.Status.Stopped  => "STOPPED",
+		_                             => "",
+	};
+	
+	private readonly State state;
+	private readonly IDisposable serverCountSubscription;
+	private readonly IDisposable channelCountSubscription;
+	private readonly IDisposable messageCountSubscription;
+	
+	[Obsolete("Designer")]
+	public StatusBarModel() : this(State.Dummy) {}
+	
+	public StatusBarModel(State state) {
+		this.state = state;
+		
+		serverCountSubscription = state.Db.Servers.TotalCount.ObserveOn(AvaloniaScheduler.Instance).Subscribe(newServerCount => ServerCount = newServerCount);
+		channelCountSubscription = state.Db.Channels.TotalCount.ObserveOn(AvaloniaScheduler.Instance).Subscribe(newChannelCount => ChannelCount = newChannelCount);
+		messageCountSubscription = state.Db.Messages.TotalCount.ObserveOn(AvaloniaScheduler.Instance).Subscribe(newMessageCount => MessageCount = newMessageCount);
+		
+		state.Server.StatusChanged += OnStateServerStatusChanged;
+		serverStatus = state.Server.IsRunning ? ServerManager.Status.Started : ServerManager.Status.Stopped;
+	}
+	
+	public void Dispose() {
+		serverCountSubscription.Dispose();
+		channelCountSubscription.Dispose();
+		messageCountSubscription.Dispose();
+		
+		state.Server.StatusChanged -= OnStateServerStatusChanged;
+	}
+	
+	private void OnStateServerStatusChanged(object? sender, ServerManager.Status e) {
+		Dispatcher.UIThread.InvokeAsync(() => ServerStatus = e);
+	}
+}

app/Desktop/Main/Dialogs/NewDatabaseSettingsDialog.axaml

@@ -0,0 +1,57 @@
+<Window xmlns="https://github.com/avaloniaui"
+        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"
+        xmlns:namespace="clr-namespace:DHT.Desktop.Main.Dialogs"
+        mc:Ignorable="d" d:DesignWidth="450"
+        x:Class="DHT.Desktop.Main.Dialogs.NewDatabaseSettingsDialog"
+        x:DataType="namespace:NewDatabaseSettingsDialogModel"
+        Title="New Database Settings"
+        Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
+        Closing="OnClosing"
+        Width="450" SizeToContent="Height" CanResize="False"
+        WindowStartupLocation="CenterOwner">
+
+    <Window.DataContext>
+        <namespace:NewDatabaseSettingsDialogModel />
+    </Window.DataContext>
+
+    <Window.Styles>
+        <Style Selector="Label > StackPanel">
+            <Setter Property="Margin" Value="0 4 0 0" />
+            <Setter Property="Orientation" Value="Vertical" />
+            <Setter Property="Spacing" Value="5" />
+        </Style>
+        <Style Selector="TextBlock.dim">
+            <Setter Property="Foreground" Value="DimGray" />
+            <Setter Property="FontSize" Value="13" />
+        </Style>
+    </Window.Styles>
+
+    <StackPanel Orientation="Vertical" Margin="20">
+        <StackPanel Orientation="Vertical" Spacing="15">
+            <CheckBox IsChecked="{Binding SeparateFileForDownloads}">
+                <Label>
+                    <StackPanel>
+                        <TextBlock>Use a Separate Database File for Downloads</TextBlock>
+                        <TextBlock Classes="dim">Downloaded files will be stored separately from messages. This cannot be changed later.</TextBlock>
+                    </StackPanel>
+                </Label>
+            </CheckBox>
+            <CheckBox IsChecked="{Binding DownloadsAutoStart}">
+                <Label>
+                    <StackPanel>
+                        <TextBlock>Download Files Automatically</TextBlock>
+                        <TextBlock Classes="dim">Enables automatic downloads of files hosted on Discord. This can be changed later in the Downloads tab.</TextBlock>
+                    </StackPanel>
+                </Label>
+            </CheckBox>
+        </StackPanel>
+        <Panel Classes="buttons">
+            <WrapPanel HorizontalAlignment="Right">
+                <Button Click="ClickOk">OK</Button>
+            </WrapPanel>
+        </Panel>
+    </StackPanel>
+
+</Window>

app/Desktop/Main/Dialogs/NewDatabaseSettingsDialog.axaml.cs

@@ -0,0 +1,22 @@
+using System.Diagnostics.CodeAnalysis;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+
+namespace DHT.Desktop.Main.Dialogs;
+
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class NewDatabaseSettingsDialog : Window {
+	public NewDatabaseSettingsDialog() {
+		InitializeComponent();
+	}
+	
+	private void OnClosing(object? sender, WindowClosingEventArgs e) {
+		if (!e.IsProgrammatic) {
+			e.Cancel = true;
+		}
+	}
+	
+	private void ClickOk(object? sender, RoutedEventArgs e) {
+		Close();
+	}
+}

app/Desktop/Main/Dialogs/NewDatabaseSettingsDialogModel.cs

@@ -0,0 +1,11 @@
+using PropertyChanged.SourceGenerator;
+
+namespace DHT.Desktop.Main.Dialogs;
+
+sealed partial class NewDatabaseSettingsDialogModel {
+	[Notify]
+	private bool separateFileForDownloads = true;
+	
+	[Notify]
+	private bool downloadsAutoStart = true;
+}

app/Desktop/Main/MainWindow.axaml

@@ -2,18 +2,19 @@
         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"
-        xmlns:windows="clr-namespace:DHT.Desktop.App.Windows"
+        xmlns:main="clr-namespace:DHT.Desktop.Main"
         mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-        x:Class="DHT.Desktop.App.Windows.MainWindow"
+        x:Class="DHT.Desktop.Main.MainWindow"
+        x:DataType="main:MainWindowModel"
         Title="{Binding Title}"
         Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
-        Width="800" Height="500"
+        Width="820" Height="520"
         MinWidth="520" MinHeight="300"
         WindowStartupLocation="CenterScreen"
-        Closed="OnClosed">
+        Closing="OnClosing">
 
     <Design.DataContext>
-        <windows:MainWindowModel />
+        <main:MainWindowModel />
     </Design.DataContext>
 
     <Panel>

app/Desktop/Main/MainWindow.axaml.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Diagnostics.CodeAnalysis;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using DHT.Utils.Logging;
+using JetBrains.Annotations;
+
+namespace DHT.Desktop.Main;
+
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class MainWindow : Window {
+	private static readonly Log Log = Log.ForType<MainWindow>();
+	
+	[UsedImplicitly]
+	public MainWindow() {
+		InitializeComponent();
+		DataContext = new MainWindowModel(this, Arguments.Empty);
+	}
+	
+	internal MainWindow(Arguments args) {
+		InitializeComponent();
+		DataContext = new MainWindowModel(this, args);
+	}
+	
+	public async void OnClosing(object? sender, WindowClosingEventArgs e) {
+		e.Cancel = true;
+		Closing -= OnClosing;
+		
+		try {
+			await Dispose();
+		} finally {
+			Close();
+		}
+	}
+	
+	private async Task Dispose() {
+		if (DataContext is MainWindowModel model) {
+			try {
+				await model.DisposeAsync();
+			} catch (Exception ex) {
+				Log.Error("Caught exception while disposing window: " + ex);
+			}
+		}
+	}
+}

app/Desktop/Main/MainWindowModel.cs

@@ -0,0 +1,144 @@
+using System;
+using System.IO;
+using System.Runtime.InteropServices;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using DHT.Desktop.Dialogs.Message;
+using DHT.Desktop.Dialogs.Progress;
+using DHT.Desktop.Main.Screens;
+using DHT.Desktop.Server;
+using DHT.Server;
+using DHT.Server.Database;
+using DHT.Utils.Logging;
+using PropertyChanged.SourceGenerator;
+
+namespace DHT.Desktop.Main;
+
+sealed partial class MainWindowModel : IAsyncDisposable {
+	private const string DefaultTitle = "Discord History Tracker";
+	
+	private static readonly Log Log = Log.ForType<MainWindowModel>();
+	
+	[Notify(Setter.Private)]
+	private string title = DefaultTitle;
+	
+	[Notify(Setter.Private)]
+	private UserControl currentScreen;
+	
+	private readonly WelcomeScreen welcomeScreen;
+	private readonly WelcomeScreenModel welcomeScreenModel;
+	
+	private MainContentScreenModel? mainContentScreenModel;
+	
+	private readonly Window window;
+	private readonly int? concurrentDownloads;
+	
+	private State? state;
+	
+	[Obsolete("Designer")]
+	public MainWindowModel() : this(null!, Arguments.Empty) {}
+	
+	public MainWindowModel(Window window, Arguments args) {
+		this.window = window;
+		
+		welcomeScreenModel = new WelcomeScreenModel(window);
+		welcomeScreenModel.DatabaseSelected += OnDatabaseSelected;
+		
+		welcomeScreen = new WelcomeScreen { DataContext = welcomeScreenModel };
+		currentScreen = welcomeScreen;
+		
+		string? dbFile = args.DatabaseFile;
+		if (!string.IsNullOrWhiteSpace(dbFile)) {
+			async void OnWindowOpened(object? o, EventArgs eventArgs) {
+				window.Opened -= OnWindowOpened;
+				
+				// https://github.com/AvaloniaUI/Avalonia/issues/3071
+				if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
+					await Task.Delay(500);
+				}
+				
+				if (File.Exists(dbFile)) {
+					await welcomeScreenModel.OpenOrCreateDatabaseFromPath(dbFile);
+				}
+				else {
+					await Dialog.ShowOk(window, "Database Error", "Database file not found:\n" + dbFile);
+				}
+			}
+			
+			window.Opened += OnWindowOpened;
+		}
+		
+		if (args.ServerPort != null) {
+			ServerConfiguration.Port = args.ServerPort.Value;
+		}
+		
+		if (args.ServerToken != null) {
+			ServerConfiguration.Token = args.ServerToken;
+		}
+		
+		concurrentDownloads = args.ConcurrentDownloads;
+	}
+	
+	private async void OnDatabaseSelected(object? sender, IDatabaseFile db) {
+		welcomeScreenModel.DatabaseSelected -= OnDatabaseSelected;
+		
+		await DisposeState();
+		
+		state = new State(db, concurrentDownloads);
+		
+		try {
+			await state.Server.Start(ServerConfiguration.Port, ServerConfiguration.Token);
+		} catch (Exception ex) {
+			Log.Error("Could not start internal server.", ex);
+			await Dialog.ShowOk(window, "Internal Server Error", ex.Message);
+		}
+		
+		try {
+			mainContentScreenModel = new MainContentScreenModel(window, state);
+			mainContentScreenModel.DatabaseClosed += MainContentScreenModelOnDatabaseClosed;
+			await mainContentScreenModel.Initialize();
+		} catch (Exception ex) {
+			Log.Error("Could not initialize content screen.", ex);
+			await Dialog.ShowOk(window, "Initialization Error", ex.Message);
+			await DisposeContent();
+			await DisposeState();
+			return;
+		}
+		
+		Title = Path.GetFileName(state.Db.Path) + " - " + DefaultTitle;
+		CurrentScreen = new MainContentScreen { DataContext = mainContentScreenModel };
+		
+		window.Focus();
+	}
+	
+	private async void MainContentScreenModelOnDatabaseClosed(object? sender, EventArgs e) {
+		await DisposeContent();
+		
+		Title = DefaultTitle;
+		CurrentScreen = welcomeScreen;
+		
+		await DisposeState();
+		
+		welcomeScreenModel.DatabaseSelected += OnDatabaseSelected;
+	}
+	
+	private async Task DisposeContent() {
+		if (mainContentScreenModel != null) {
+			mainContentScreenModel.DatabaseClosed -= MainContentScreenModelOnDatabaseClosed;
+			await mainContentScreenModel.DisposeAsync();
+			mainContentScreenModel = null;
+		}
+	}
+	
+	private async Task DisposeState() {
+		if (state != null) {
+			await DelayedProgressDialog.Await(() => state.DisposeAsync().AsTask(), TimeSpan.FromMilliseconds(200), window, "Close Database", "Please wait for the database to close...");
+			state = null;
+		}
+	}
+	
+	public async ValueTask DisposeAsync() {
+		await DisposeContent();
+		await DisposeState();
+	}
+}

app/Desktop/Main/Pages/AdvancedPage.axaml

@@ -2,10 +2,11 @@
              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"
-             xmlns:pages="clr-namespace:DHT.Desktop.App.Pages"
-             xmlns:controls="clr-namespace:DHT.Desktop.App.Controls"
+             xmlns:pages="clr-namespace:DHT.Desktop.Main.Pages"
+             xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="DHT.Desktop.App.Pages.AdvancedPage">
+             x:Class="DHT.Desktop.Main.Pages.AdvancedPage"
+             x:DataType="pages:AdvancedPageModel">
 
     <Design.DataContext>
         <pages:AdvancedPageModel />
@@ -15,11 +16,5 @@
         <Expander Header="Internal Server Configuration" IsExpanded="True">
             <controls:ServerConfigurationPanel DataContext="{Binding ServerConfigurationModel}" />
         </Expander>
-        <Expander Header="Database Tools" IsExpanded="True">
-            <StackPanel Orientation="Vertical" Spacing="10">
-                <TextBlock TextWrapping="Wrap">Recreates the database to remove any traces of deleted data, which frees up space and prevents forensic recovery.</TextBlock>
-                <Button Command="{Binding VacuumDatabase}">Vacuum Database</Button>
-            </StackPanel>
-        </Expander>
     </StackPanel>
 </UserControl>

app/Desktop/Main/Pages/AdvancedPage.axaml.cs

@@ -1,7 +1,7 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
 
-namespace DHT.Desktop.App.Pages;
+namespace DHT.Desktop.Main.Pages;
 
 [SuppressMessage("ReSharper", "MemberCanBeInternal")]
 public sealed partial class AdvancedPage : UserControl {

app/Desktop/Main/Pages/AdvancedPageModel.cs

@@ -0,0 +1,21 @@
+using System;
+using Avalonia.Controls;
+using DHT.Desktop.Main.Controls;
+using DHT.Server;
+
+namespace DHT.Desktop.Main.Pages;
+
+sealed class AdvancedPageModel : IDisposable {
+	public ServerConfigurationPanelModel ServerConfigurationModel { get; }
+	
+	[Obsolete("Designer")]
+	public AdvancedPageModel() : this(null!, State.Dummy) {}
+	
+	public AdvancedPageModel(Window window, State state) {
+		ServerConfigurationModel = new ServerConfigurationPanelModel(window, state);
+	}
+	
+	public void Dispose() {
+		ServerConfigurationModel.Dispose();
+	}
+}

app/Desktop/Main/Pages/DatabasePage.axaml

@@ -2,28 +2,31 @@
              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"
-             xmlns:pages="clr-namespace:DHT.Desktop.App.Pages"
+             xmlns:pages="clr-namespace:DHT.Desktop.Main.Pages"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="DHT.Desktop.App.Pages.DatabasePage">
+             x:Class="DHT.Desktop.Main.Pages.DatabasePage"
+             x:DataType="pages:DatabasePageModel">
 
     <Design.DataContext>
         <pages:DatabasePageModel />
     </Design.DataContext>
 
-    <UserControl.Styles>
-        <Style Selector="WrapPanel > Button">
-            <Setter Property="Margin" Value="0 0 10 10" />
-        </Style>
-    </UserControl.Styles>
-
     <StackPanel Spacing="10">
         <DockPanel>
             <Button Command="{Binding CloseDatabase}" DockPanel.Dock="Right">Close Database</Button>
             <TextBox Text="{Binding Db.Path}" Width="NaN" Margin="0 0 10 0" IsReadOnly="True" />
         </DockPanel>
-        <WrapPanel>
+        <WrapPanel ItemSpacing="10" LineSpacing="10">
             <Button Command="{Binding OpenDatabaseFolder}">Open Database Folder</Button>
+            <Button Command="{Binding MergeWithDatabase}">Merge with Database(s)...</Button>
+            <Button Command="{Binding ImportLegacyArchive}">Import Legacy Archive(s)...</Button>
         </WrapPanel>
+        <Expander Header="Advanced Tools" Margin="0 25 0 0">
+            <StackPanel Orientation="Vertical" Spacing="10">
+                <TextBlock TextWrapping="Wrap">Recreate the database to free up space after deleting data.</TextBlock>
+                <Button Command="{Binding VacuumDatabase}">Vacuum Database</Button>
+            </StackPanel>
+        </Expander>
     </StackPanel>
 
 </UserControl>

app/Desktop/Main/Pages/DatabasePage.axaml.cs

@@ -1,7 +1,7 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
 
-namespace DHT.Desktop.App.Pages;
+namespace DHT.Desktop.Main.Pages;
 
 [SuppressMessage("ReSharper", "MemberCanBeInternal")]
 public sealed partial class DatabasePage : UserControl {

app/Desktop/Main/Pages/DatabasePageModel.cs

@@ -0,0 +1,312 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.IO;
+using System.Linq;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Platform.Storage;
+using Avalonia.Threading;
+using DHT.Desktop.Common;
+using DHT.Desktop.Dialogs.File;
+using DHT.Desktop.Dialogs.Message;
+using DHT.Desktop.Dialogs.Progress;
+using DHT.Desktop.Dialogs.TextBox;
+using DHT.Server;
+using DHT.Server.Data;
+using DHT.Server.Database;
+using DHT.Server.Database.Import;
+using DHT.Server.Database.Sqlite.Schema;
+using DHT.Server.Database.Sqlite.Utils;
+using DHT.Utils.Logging;
+
+namespace DHT.Desktop.Main.Pages;
+
+sealed class DatabasePageModel {
+	private static readonly Log Log = Log.ForType<DatabasePageModel>();
+	
+	public IDatabaseFile Db { get; }
+	
+	public event EventHandler? DatabaseClosed;
+	
+	private readonly Window window;
+	
+	[Obsolete("Designer")]
+	public DatabasePageModel() : this(null!, State.Dummy) {}
+	
+	public DatabasePageModel(Window window, State state) {
+		this.window = window;
+		this.Db = state.Db;
+	}
+	
+	public async Task OpenDatabaseFolder() {
+		string file = Db.Path;
+		string? folder = Path.GetDirectoryName(file);
+		
+		if (folder == null) {
+			return;
+		}
+		
+		switch (Environment.OSVersion.Platform) {
+			case PlatformID.Win32NT:
+				Process.Start("explorer.exe", "/select,\"" + file + "\"");
+				break;
+			
+			case PlatformID.Unix:
+				Process.Start("xdg-open", [ folder ]);
+				break;
+			
+			case PlatformID.MacOSX:
+				Process.Start("open", [ folder ]);
+				break;
+			
+			default:
+				await Dialog.ShowOk(window, "Feature Not Supported", "This feature is not supported for your operating system.");
+				break;
+		}
+	}
+	
+	public void CloseDatabase() {
+		DatabaseClosed?.Invoke(this, EventArgs.Empty);
+	}
+	
+	public async Task MergeWithDatabase() {
+		string[] paths = await DatabaseGui.NewOpenDatabaseFilesDialog(window, Path.GetDirectoryName(Db.Path));
+		if (paths.Length == 0) {
+			return;
+		}
+		
+		const string Title = "Database Merge";
+		
+		ImportResult? result;
+		try {
+			result = await ProgressDialog.Show(window, Title, async (dialog, callback) => await MergeWithDatabaseFromPaths(Db, paths, dialog, callback));
+		} catch (Exception e) {
+			Log.Error("Could not merge databases.", e);
+			await Dialog.ShowOk(window, Title, "Could not merge databases: " + e.Message);
+			return;
+		}
+		
+		await Dialog.ShowOk(window, Title, GetImportDialogMessage(result, "database file"));
+	}
+	
+	private static async Task<ImportResult?> MergeWithDatabaseFromPaths(IDatabaseFile target, string[] paths, ProgressDialog dialog, IProgressCallback callback) {
+		var schemaUpgradeCallbacks = new SchemaUpgradeCallbacks(dialog, paths.Length);
+		
+		return await PerformImport(target, paths, dialog, callback, "Database Merge", async path => {
+			IDatabaseFile? db = await DatabaseGui.TryOpenOrCreateDatabaseFromPath(path, dialog, schemaUpgradeCallbacks);
+			
+			if (db == null) {
+				return false;
+			}
+			
+			try {
+				await target.AddFrom(db);
+				return true;
+			} finally {
+				await db.DisposeAsync();
+			}
+		});
+	}
+	
+	private sealed class SchemaUpgradeCallbacks(ProgressDialog dialog, int total) : ISchemaUpgradeCallbacks {
+		private bool? decision;
+		
+		public Task<InitialDatabaseSettings?> GetInitialDatabaseSettings() {
+			return Task.FromResult<InitialDatabaseSettings?>(null);
+		}
+		
+		public async Task<bool> CanUpgrade() {
+			return decision ??= (total > 1
+				                     ? await DatabaseGui.ShowCanUpgradeMultipleDatabaseDialog(dialog)
+				                     : await DatabaseGui.ShowCanUpgradeDatabaseDialog(dialog)) == DialogResult.YesNo.Yes;
+		}
+		
+		public Task Start(int versionSteps, Func<ISchemaUpgradeCallbacks.IProgressReporter, Task> doUpgrade) {
+			return doUpgrade(new NullReporter());
+		}
+		
+		private sealed class NullReporter : ISchemaUpgradeCallbacks.IProgressReporter {
+			public Task NextVersion() {
+				return Task.CompletedTask;
+			}
+			
+			public Task MainWork(string message, int finishedItems, int totalItems) {
+				return Task.CompletedTask;
+			}
+			
+			public Task SubWork(string message, int finishedItems, int totalItems) {
+				return Task.CompletedTask;
+			}
+		}
+	}
+	
+	public async Task ImportLegacyArchive() {
+		string[] paths = await window.StorageProvider.OpenFiles(new FilePickerOpenOptions {
+			Title = "Open Legacy DHT Archive",
+			SuggestedStartLocation = await FileDialogs.GetSuggestedStartLocation(window, Path.GetDirectoryName(Db.Path)),
+			AllowMultiple = true,
+		});
+		
+		if (paths.Length == 0) {
+			return;
+		}
+		
+		const string Title = "Legacy Archive Import";
+		
+		ImportResult? result;
+		try {
+			result = await ProgressDialog.Show(window, Title, async (dialog, callback) => await ImportLegacyArchiveFromPaths(Db, paths, dialog, callback));
+		} catch (Exception e) {
+			Log.Error("Could not import legacy archives.", e);
+			await Dialog.ShowOk(window, Title, "Could not import legacy archives: " + e.Message);
+			return;
+		}
+		
+		await Dialog.ShowOk(window, Title, GetImportDialogMessage(result, "archive file"));
+	}
+	
+	private static async Task<ImportResult?> ImportLegacyArchiveFromPaths(IDatabaseFile target, string[] paths, ProgressDialog dialog, IProgressCallback callback) {
+		var fakeSnowflake = new FakeSnowflake();
+		
+		return await PerformImport(target, paths, dialog, callback, "Legacy Archive Import", async path => {
+			await using var jsonStream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read);
+			
+			return await LegacyArchiveImport.Read(jsonStream, target, fakeSnowflake, async servers => {
+				SynchronizationContext? prevSyncContext = SynchronizationContext.Current;
+				SynchronizationContext.SetSynchronizationContext(new AvaloniaSynchronizationContext());
+				Dictionary<DHT.Server.Data.Server, ulong>? result = await Dispatcher.UIThread.InvokeAsync(() => AskForServerIds(dialog, servers));
+				SynchronizationContext.SetSynchronizationContext(prevSyncContext);
+				return result;
+			});
+		});
+	}
+	
+	private static async Task<Dictionary<DHT.Server.Data.Server, ulong>?> AskForServerIds(Window window, DHT.Server.Data.Server[] servers) {
+		static bool IsValidSnowflake(string value) {
+			return string.IsNullOrEmpty(value) || ulong.TryParse(value, out _);
+		}
+		
+		var items = new List<TextBoxItem<DHT.Server.Data.Server>>();
+		
+		foreach (DHT.Server.Data.Server server in servers.OrderBy(static server => server.Type).ThenBy(static server => server.Name)) {
+			items.Add(new TextBoxItem<DHT.Server.Data.Server>(server) {
+				Title = server.Name + " (" + ServerTypes.ToNiceString(server.Type) + ")",
+				ValidityCheck = IsValidSnowflake,
+			});
+		}
+		
+		var model = new TextBoxDialogModel<DHT.Server.Data.Server>(items) {
+			Title = "Imported Server IDs",
+			Description = "Please fill in the IDs of servers and direct messages. First enable Developer Mode in Discord, then right-click each server or direct message, click 'Copy ID', and paste it into the input field. If a server no longer exists, leave its input field empty to use a random ID.",
+		};
+		
+		var dialog = new TextBoxDialog { DataContext = model };
+		var result = await dialog.ShowDialog<DialogResult.OkCancel>(window);
+		
+		if (result != DialogResult.OkCancel.Ok) {
+			return null;
+		}
+		
+		return model.ValidItems
+		            .Where(static item => !string.IsNullOrEmpty(item.Value))
+		            .ToDictionary(static item => item.Item, static item => ulong.Parse(item.Value));
+	}
+	
+	private static async Task<ImportResult?> PerformImport(IDatabaseFile target, string[] paths, ProgressDialog dialog, IProgressCallback callback, string dialogTitle, Func<string, Task<bool>> performImport) {
+		int total = paths.Length;
+		DatabaseStatistics oldStatistics = await DatabaseStatistics.Take(target);
+		
+		int successful = 0;
+		int finished = 0;
+		
+		foreach (string path in paths) {
+			await callback.Update(Path.GetFileName(path), finished, total);
+			++finished;
+			
+			if (!File.Exists(path)) {
+				await Dialog.ShowOk(dialog, dialogTitle, "File '" + Path.GetFileName(path) + "' no longer exists.");
+				continue;
+			}
+			
+			try {
+				if (await performImport(path)) {
+					++successful;
+				}
+			} catch (Exception ex) {
+				Log.Error("Could not import file: " + path, ex);
+				await Dialog.ShowOk(dialog, dialogTitle, "File '" + Path.GetFileName(path) + "' could not be imported: " + ex.Message);
+			}
+		}
+		
+		await callback.Update("Done", finished, total);
+		
+		if (successful == 0) {
+			return null;
+		}
+		
+		DatabaseStatistics newStatistics = await DatabaseStatistics.Take(target);
+		return new ImportResult(oldStatistics, newStatistics, successful, total);
+	}
+	
+	private sealed record DatabaseStatistics(long ServerCount, long ChannelCount, long UserCount, long MessageCount) {
+		public static async Task<DatabaseStatistics> Take(IDatabaseFile db) {
+			return new DatabaseStatistics(
+				await db.Servers.Count(),
+				await db.Channels.Count(),
+				await db.Users.Count(),
+				await db.Messages.Count()
+			);
+		}
+	}
+	
+	private sealed record ImportResult(DatabaseStatistics OldStatistics, DatabaseStatistics NewStatistics, int SuccessfulItems, int TotalItems);
+	
+	private static string GetImportDialogMessage(ImportResult? result, string itemName) {
+		if (result == null) {
+			return "Nothing was imported.";
+		}
+		
+		var oldStatistics = result.OldStatistics;
+		var newStatistics = result.NewStatistics;
+		
+		long newServers = newStatistics.ServerCount - oldStatistics.ServerCount;
+		long newChannels = newStatistics.ChannelCount - oldStatistics.ChannelCount;
+		long newUsers = newStatistics.UserCount - oldStatistics.UserCount;
+		long newMessages = newStatistics.MessageCount - oldStatistics.MessageCount;
+		
+		var message = new StringBuilder();
+		message.Append("Processed ");
+		
+		if (result.SuccessfulItems == result.TotalItems) {
+			message.Append(result.SuccessfulItems.Pluralize(itemName));
+		}
+		else {
+			message.Append(result.SuccessfulItems.Format()).Append(" out of ").Append(result.TotalItems.Pluralize(itemName));
+		}
+		
+		message.Append(" and added:\n\n  \u2022 ");
+		message.Append(newServers.Pluralize("server")).Append("\n  \u2022 ");
+		message.Append(newChannels.Pluralize("channel")).Append("\n  \u2022 ");
+		message.Append(newUsers.Pluralize("user")).Append("\n  \u2022 ");
+		message.Append(newMessages.Pluralize("message"));
+		
+		return message.ToString();
+	}
+	
+	public async Task VacuumDatabase() {
+		const string Title = "Vacuum Database";
+		
+		try {
+			await ProgressDialog.ShowIndeterminate(window, Title, "Vacuuming database...", _ => Db.Vacuum());
+		} catch (Exception e) {
+			Log.Error("Could not vacuum database.", e);
+			await Dialog.ShowOk(window, Title, "Could not vacuum database: " + e.Message);
+			return;
+		}
+		
+		await Dialog.ShowOk(window, Title, "Done.");
+	}
+}

app/Desktop/Main/Pages/DebugPage.axaml

@@ -0,0 +1,52 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             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"
+             xmlns:pages="clr-namespace:DHT.Desktop.Main.Pages"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="DHT.Desktop.Main.Pages.DebugPage"
+             x:DataType="pages:DebugPageModel">
+
+    <Design.DataContext>
+        <pages:DebugPageModel />
+    </Design.DataContext>
+
+    <UserControl.Styles>
+        <Style Selector="TextBox">
+            <Setter Property="FontFamily" Value="Consolas,Courier" />
+            <Setter Property="FontSize" Value="15" />
+        </Style>
+        <Style Selector="Label">
+            <Setter Property="Margin" Value="0" />
+            <Setter Property="Padding" Value="0" />
+        </Style>
+        <Style Selector="WrapPanel > StackPanel">
+            <Setter Property="Orientation" Value="Vertical" />
+        </Style>
+    </UserControl.Styles>
+
+    <StackPanel Orientation="Vertical" Spacing="10">
+        <Expander Header="Generate Random Data" IsExpanded="True">
+            <WrapPanel ItemSpacing="10" LineSpacing="10">
+                <StackPanel Spacing="8">
+                    <Label Target="Channels">Channels</Label>
+                    <TextBox x:Name="Channels" Width="100" Text="{Binding GenerateChannels}" />
+                </StackPanel>
+                <StackPanel Spacing="8">
+                    <Label Target="Users">Users</Label>
+                    <TextBox x:Name="Users" Width="100" Text="{Binding GenerateUsers}" />
+                </StackPanel>
+                <StackPanel Spacing="8">
+                    <Label Target="Messages">Messages</Label>
+                    <TextBox x:Name="Messages" Width="100" Text="{Binding GenerateMessages}" />
+                </StackPanel>
+                <StackPanel VerticalAlignment="Bottom">
+                    <Button Command="{Binding OnClickAddRandomDataToDatabase}">Add to Database</Button>
+                </StackPanel>
+            </WrapPanel>
+        </Expander>
+        <Expander Header="About" IsExpanded="True">
+            <TextBlock Text="{Binding SqliteVersion, StringFormat=Sqlite Version: {0}}" />
+        </Expander>
+    </StackPanel>
+</UserControl>

app/Desktop/Main/Pages/DebugPage.axaml.cs

@@ -0,0 +1,11 @@
+using System.Diagnostics.CodeAnalysis;
+using Avalonia.Controls;
+
+namespace DHT.Desktop.Main.Pages;
+
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class DebugPage : UserControl {
+	public DebugPage() {
+		InitializeComponent();
+	}
+}

app/Desktop/Main/Pages/DebugPageModel.cs

@@ -0,0 +1,184 @@
+#if DEBUG
+using System;
+using System.Collections.Immutable;
+using System.Linq;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using DHT.Desktop.Dialogs.Message;
+using DHT.Desktop.Dialogs.Progress;
+using DHT.Server;
+using DHT.Server.Data;
+using DHT.Server.Service;
+using PropertyChanged.SourceGenerator;
+
+namespace DHT.Desktop.Main.Pages;
+
+sealed partial class DebugPageModel {
+	public string GenerateChannels { get; set; } = "0";
+	public string GenerateUsers { get; set; } = "0";
+	public string GenerateMessages { get; set; } = "0";
+	
+	[Notify(Setter.Private)]
+	private string? sqliteVersion = string.Empty;
+	
+	private readonly Window window;
+	private readonly State state;
+	
+	[Obsolete("Designer")]
+	public DebugPageModel() : this(null!, State.Dummy) {}
+	
+	public DebugPageModel(Window window, State state) {
+		this.window = window;
+		this.state = state;
+	}
+	
+	public async Task Initialize() {
+		SqliteVersion = await state.Db.GetVersion() ?? "<unknown>";
+	}
+	
+	public async void OnClickAddRandomDataToDatabase() {
+		if (!int.TryParse(GenerateChannels, out int channels) || channels < 1) {
+			await Dialog.ShowOk(window, "Generate Random Data", "Amount of channels must be at least 1!");
+			return;
+		}
+		
+		if (!int.TryParse(GenerateUsers, out int users) || users < 1) {
+			await Dialog.ShowOk(window, "Generate Random Data", "Amount of users must be at least 1!");
+			return;
+		}
+		
+		if (!int.TryParse(GenerateMessages, out int messages) || messages < 1) {
+			await Dialog.ShowOk(window, "Generate Random Data", "Amount of messages must be at least 1!");
+			return;
+		}
+		
+		await ProgressDialog.Show(window, "Generating Random Data", async (_, callback) => await GenerateRandomData(channels, users, messages, callback));
+	}
+	
+	private const int BatchSize = 500;
+	
+	private async Task GenerateRandomData(int channelCount, int userCount, int messageCount, IProgressCallback callback) {
+		int batchCount = (messageCount + BatchSize - 1) / BatchSize;
+		await callback.Update("Adding messages in batches of " + BatchSize, finishedItems: 0, totalItems: batchCount);
+		
+		var rand = new Random();
+		var server = new DHT.Server.Data.Server {
+			Id = RandomId(rand),
+			Name = RandomName("s"),
+			Type = ServerType.Server,
+		};
+		
+		Channel[] channels = Enumerable.Range(start: 0, channelCount).Select(i => new Channel {
+			Id = RandomId(rand),
+			Server = server.Id,
+			Name = RandomName("c"),
+			ParentId = null,
+			Position = i,
+			Topic = RandomText(rand, maxWords: 10),
+			Nsfw = rand.Next(4) == 0,
+		}).ToArray();
+		
+		User[] users = Enumerable.Range(start: 0, userCount).Select(_ => new User {
+			Id = RandomId(rand),
+			Name = RandomName("u"),
+			DisplayName = RandomName("u"),
+			AvatarHash = null,
+			Discriminator = rand.Next(minValue: 0, maxValue: 9999).ToString(),
+		}).ToArray();
+		
+		await state.Db.Users.Add(users);
+		await state.Db.Servers.Add([server]);
+		await state.Db.Channels.Add(channels);
+		
+		DateTimeOffset now = DateTimeOffset.Now;
+		int batchIndex = 0;
+		
+		while (messageCount > 0) {
+			int hourOffset = batchIndex;
+			
+			Message[] messages = Enumerable.Range(start: 0, Math.Min(messageCount, BatchSize)).Select(i => {
+				DateTimeOffset time = now.AddHours(hourOffset).AddMinutes(i * 60.0 / BatchSize);
+				DateTimeOffset? edit = rand.Next(100) == 0 ? time.AddSeconds(rand.Next(minValue: 1, maxValue: 60)) : null;
+				
+				long timeMillis = time.ToUnixTimeMilliseconds();
+				long? editMillis = edit?.ToUnixTimeMilliseconds();
+				
+				return new Message {
+					Id = (ulong) timeMillis,
+					Sender = RandomBiasedIndex(rand, users).Id,
+					Channel = RandomBiasedIndex(rand, channels).Id,
+					Text = RandomText(rand, maxWords: 100),
+					Timestamp = timeMillis,
+					EditTimestamp = editMillis,
+					RepliedToId = null,
+					Attachments = ImmutableList<Attachment>.Empty,
+					Embeds = ImmutableList<Embed>.Empty,
+					Reactions = ImmutableList<Reaction>.Empty,
+				};
+			}).ToArray();
+			
+			await state.Db.Messages.Add(messages);
+			
+			messageCount -= BatchSize;
+			await callback.Update("Adding messages in batches of " + BatchSize, ++batchIndex, batchCount);
+		}
+	}
+	
+	private static ulong RandomId(Random rand) {
+		ulong h = unchecked((ulong) rand.Next());
+		ulong l = unchecked((ulong) rand.Next());
+		return (h << 32) | l;
+	}
+	
+	private static string RandomName(string prefix) {
+		return prefix + "-" + ServerUtils.GenerateRandomToken(5);
+	}
+	
+	private static T RandomBiasedIndex<T>(Random rand, T[] options) {
+		return options[(int) Math.Floor(options.Length * rand.NextDouble() * rand.NextDouble())];
+	}
+	
+	private static readonly string[] RandomWords = [
+		"apple", "apricot", "artichoke", "arugula", "asparagus", "avocado",
+		"banana", "bean", "beechnut", "beet", "blackberry", "blackcurrant", "blueberry", "boysenberry", "bramble", "broccoli",
+		"cabbage", "cacao", "cantaloupe", "caper", "carambola", "carrot", "cauliflower", "celery", "chard", "cherry", "chokeberry", "citron", "clementine", "coconut", "corn", "crabapple", "cranberry", "cucumber", "currant",
+		"daikon", "date", "dewberry", "durian",
+		"edamame", "eggplant", "elderberry", "endive",
+		"fig",
+		"garlic", "ginger", "gooseberry", "grape", "grapefruit", "guava",
+		"honeysuckle", "horseradish", "huckleberry",
+		"jackfruit", "jicama",
+		"kale", "kiwi", "kohlrabi", "kumquat",
+		"leek", "lemon", "lentil", "lettuce", "lime",
+		"mandarin", "mango", "mushroom", "myrtle",
+		"nectarine", "nut",
+		"olive", "okra", "onion", "orange",
+		"papaya", "parsnip", "pawpaw", "peach", "pear", "pea", "pepper", "persimmon", "pineapple", "plum", "plantain", "pomegranate", "pomelo", "potato", "prune", "pumpkin",
+		"quandong", "quinoa",
+		"radicchio", "radish", "raisin", "raspberry", "redcurrant", "rhubarb", "rutabaga",
+		"spinach", "strawberry", "squash",
+		"tamarind", "tangerine", "tomatillo", "tomato", "turnip",
+		"vanilla",
+		"watercress", "watermelon",
+		"yam",
+		"zucchini",
+	];
+	
+	private static string RandomText(Random rand, int maxWords) {
+		int wordCount = 1 + (int) Math.Floor(maxWords * Math.Pow(rand.NextDouble(), y: 3));
+		return string.Join(separator: ' ', Enumerable.Range(start: 0, wordCount).Select(_ => RandomWords[rand.Next(RandomWords.Length)]));
+	}
+}
+#else
+namespace DHT.Desktop.Main.Pages;
+
+sealed class DebugPageModel {
+	public string GenerateChannels { get; set; } = "0";
+	public string GenerateUsers { get; set; } = "0";
+	public string GenerateMessages { get; set; } = "0";
+
+	public string SqliteVersion => string.Empty;
+	
+	public void OnClickAddRandomDataToDatabase() {}
+}
+#endif

app/Desktop/Main/Pages/DownloadsPage.axaml

@@ -0,0 +1,51 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             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"
+             xmlns:pages="clr-namespace:DHT.Desktop.Main.Pages"
+             xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="DHT.Desktop.Main.Pages.DownloadsPage"
+             x:DataType="pages:DownloadsPageModel">
+
+    <Design.DataContext>
+        <pages:DownloadsPageModel />
+    </Design.DataContext>
+
+    <UserControl.Styles>
+        <Style Selector="DataGridColumnHeader">
+            <Setter Property="FontWeight" Value="Medium" />
+        </Style>
+        <Style Selector="DataGridColumnHeader:nth-child(2)">
+            <Setter Property="HorizontalContentAlignment" Value="Right" />
+        </Style>
+        <Style Selector="DataGridColumnHeader:nth-child(3)">
+            <Setter Property="HorizontalContentAlignment" Value="Right" />
+        </Style>
+        <Style Selector="DataGridCell.right">
+            <Setter Property="HorizontalContentAlignment" Value="Right" />
+        </Style>
+    </UserControl.Styles>
+
+    <StackPanel Orientation="Vertical" Spacing="20">
+        <WrapPanel Orientation="Horizontal" ItemSpacing="10" LineSpacing="10">
+            <Button Command="{Binding OnClickToggleDownload}" Content="{Binding ToggleDownloadButtonText}" IsEnabled="{Binding IsToggleDownloadButtonEnabled}" />
+            <Button Command="{Binding OnClickRetryFailed}" IsEnabled="{Binding IsRetryFailedOnDownloadsButtonEnabled}">Retry Failed</Button>
+            <Button Command="{Binding OnClickDeleteOrphaned}">Delete Orphaned</Button>
+            <Button Command="{Binding OnClickExportAll}" IsEnabled="{Binding HasSuccessfulDownloads}">Export All...</Button>
+        </WrapPanel>
+        <controls:DownloadItemFilterPanel DataContext="{Binding FilterModel}" IsEnabled="{Binding !$parent[UserControl].((pages:DownloadsPageModel)DataContext).IsDownloading}" />
+        <TextBlock TextWrapping="Wrap">
+            Downloading state and filter settings are remembered per-database.
+        </TextBlock>
+        <Expander Header="Download Status" IsExpanded="True">
+            <DataGrid ItemsSource="{Binding StatisticsRows}" AutoGenerateColumns="False" CanUserReorderColumns="False" CanUserResizeColumns="False" CanUserSortColumns="False" IsReadOnly="True">
+                <DataGrid.Columns>
+                    <DataGridTextColumn Header="State" Binding="{Binding State, Mode=OneWay}" Width="*" />
+                    <DataGridTextColumn Header="Files" Binding="{Binding Items, Mode=OneWay, Converter={StaticResource NumberValueConverter}}" Width="*" CellStyleClasses="right" />
+                    <DataGridTextColumn Header="Size" Binding="{Binding SizeText, Mode=OneWay}" Width="*" CellStyleClasses="right" />
+                </DataGrid.Columns>
+            </DataGrid>
+        </Expander>
+    </StackPanel>
+</UserControl>

app/Desktop/Main/Pages/DownloadsPage.axaml.cs

@@ -0,0 +1,11 @@
+using System.Diagnostics.CodeAnalysis;
+using Avalonia.Controls;
+
+namespace DHT.Desktop.Main.Pages;
+
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class DownloadsPage : UserControl {
+	public DownloadsPage() {
+		InitializeComponent();
+	}
+}

app/Desktop/Main/Pages/DownloadsPageModel.cs

@@ -0,0 +1,336 @@
+using System;
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.ComponentModel;
+using System.Reactive.Linq;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Platform.Storage;
+using Avalonia.ReactiveUI;
+using DHT.Desktop.Common;
+using DHT.Desktop.Dialogs.File;
+using DHT.Desktop.Dialogs.Message;
+using DHT.Desktop.Dialogs.Progress;
+using DHT.Desktop.Main.Controls;
+using DHT.Server;
+using DHT.Server.Data;
+using DHT.Server.Data.Aggregations;
+using DHT.Server.Data.Filters;
+using DHT.Server.Data.Settings;
+using DHT.Server.Download;
+using DHT.Utils.Logging;
+using DHT.Utils.Tasks;
+using PropertyChanged.SourceGenerator;
+
+namespace DHT.Desktop.Main.Pages;
+
+sealed partial class DownloadsPageModel : IAsyncDisposable {
+	private static readonly Log Log = Log.ForType<DownloadsPageModel>();
+	
+	[Notify(Setter.Private)]
+	private bool isToggleDownloadButtonEnabled = true;
+	
+	[DependsOn(nameof(IsDownloading))]
+	public string ToggleDownloadButtonText => IsDownloading ? "Stop Downloading" : "Start Downloading";
+	
+	[Notify(Setter.Private)]
+	private bool isRetryingFailedDownloads = false;
+	
+	[Notify(Setter.Private)]
+	private bool hasSuccessfulDownloads;
+	
+	[Notify(Setter.Private)]
+	private bool hasFailedDownloads;
+	
+	[DependsOn(nameof(IsRetryingFailedDownloads), nameof(HasFailedDownloads))]
+	public bool IsRetryFailedOnDownloadsButtonEnabled => !IsRetryingFailedDownloads && HasFailedDownloads;
+	
+	[Notify(Setter.Private)]
+	private string downloadMessage = "";
+	
+	public DownloadItemFilterPanelModel FilterModel { get; }
+	
+	private readonly StatisticsRow statisticsPending = new ("Pending");
+	private readonly StatisticsRow statisticsDownloaded = new ("Downloaded");
+	private readonly StatisticsRow statisticsFailed = new ("Failed");
+	private readonly StatisticsRow statisticsSkipped = new ("Skipped");
+	
+	public ObservableCollection<StatisticsRow> StatisticsRows { get; }
+	
+	public bool IsDownloading => state.Downloader.IsDownloading;
+	
+	private readonly Window window;
+	private readonly State state;
+	private readonly ThrottledTask<DownloadStatusStatistics> downloadStatisticsTask;
+	private readonly IDisposable downloadItemCountSubscription;
+	
+	private IDisposable? finishedItemsSubscription;
+	private DownloadItemFilter? currentDownloadFilter;
+	
+	public DownloadsPageModel() : this(null!, State.Dummy) {}
+	
+	public DownloadsPageModel(Window window, State state) {
+		this.window = window;
+		this.state = state;
+		
+		FilterModel = new DownloadItemFilterPanelModel(state);
+		
+		StatisticsRows = [
+			statisticsPending,
+			statisticsDownloaded,
+			statisticsFailed,
+			statisticsSkipped,
+		];
+		
+		downloadStatisticsTask = new ThrottledTask<DownloadStatusStatistics>(Log, UpdateStatistics, TaskScheduler.FromCurrentSynchronizationContext());
+		downloadItemCountSubscription = state.Db.Downloads.TotalCount.ObserveOn(AvaloniaScheduler.Instance).Subscribe(OnDownloadCountChanged);
+		
+		RecomputeDownloadStatistics();
+	}
+	
+	public async Task Initialize() {
+		await FilterModel.Initialize();
+		
+		if (await state.Db.Settings.Get(SettingsKey.DownloadsAutoStart, defaultValue: false)) {
+			try {
+				await StartDownload();
+			} catch (Exception e) {
+				Log.Error("Could not automatically start downloads.", e);
+				await Dialog.ShowOk(window, "Database Error", "Could not automatically start downloads: " + e.Message);
+			}
+		}
+	}
+	
+	public async ValueTask DisposeAsync() {
+		finishedItemsSubscription?.Dispose();
+		
+		downloadItemCountSubscription.Dispose();
+		downloadStatisticsTask.Dispose();
+		
+		await FilterModel.DisposeAsync();
+	}
+	
+	private void OnDownloadCountChanged(long newDownloadCount) {
+		RecomputeDownloadStatistics();
+	}
+	
+	public async Task OnClickToggleDownload() {
+		IsToggleDownloadButtonEnabled = false;
+		try {
+			if (IsDownloading) {
+				await StopDownload();
+			}
+			else {
+				try {
+					await StartDownload();
+				} catch (Exception e) {
+					Log.Error("Could not start downloads.", e);
+					await Dialog.ShowOk(window, "Database Error", "Could not start downloads: " + e.Message);
+					return;
+				}
+			}
+			
+			try {
+				await state.Db.Settings.Set(SettingsKey.DownloadsAutoStart, IsDownloading);
+			} catch (Exception e) {
+				Log.Error("Could not update auto-start setting in database.", e);
+			}
+		} finally {
+			IsToggleDownloadButtonEnabled = true;
+		}
+	}
+	
+	private async Task StartDownload() {
+		await state.Db.Downloads.MoveDownloadingItemsBackToQueue();
+		
+		try {
+			currentDownloadFilter = FilterModel.CreateFilter();
+			IObservable<DownloadItem> finishedItems = await state.Downloader.Start(currentDownloadFilter);
+			finishedItemsSubscription = finishedItems.ObserveOn(AvaloniaScheduler.Instance).Subscribe(OnItemFinished);
+		} catch (Exception) {
+			finishedItemsSubscription?.Dispose();
+			finishedItemsSubscription = null;
+			currentDownloadFilter = null;
+			throw;
+		}
+		
+		OnDownloadStateChanged();
+	}
+	
+	private async Task StopDownload() {
+		await state.Downloader.Stop();
+		await state.Db.Downloads.MoveDownloadingItemsBackToQueue();
+		
+		finishedItemsSubscription?.Dispose();
+		finishedItemsSubscription = null;
+		currentDownloadFilter = null;
+		
+		OnDownloadStateChanged();
+	}
+	
+	private void OnDownloadStateChanged() {
+		RecomputeDownloadStatistics();
+		
+		OnPropertyChanged(new PropertyChangedEventArgs(nameof(IsDownloading)));
+	}
+	
+	private void OnItemFinished(DownloadItem item) {
+		RecomputeDownloadStatistics();
+	}
+	
+	public async Task OnClickRetryFailed() {
+		IsRetryingFailedDownloads = true;
+		try {
+			await state.Db.Downloads.RetryFailed();
+			RecomputeDownloadStatistics();
+		} catch (Exception e) {
+			Log.Error("Could not retry failed downloads.", e);
+			await Dialog.ShowOk(window, "Retry Failed", "Could not retry failed downloads: " + e.Message);
+		} finally {
+			IsRetryingFailedDownloads = false;
+		}
+	}
+	
+	private void RecomputeDownloadStatistics() {
+		downloadStatisticsTask.Post(cancellationToken => state.Db.Downloads.GetStatistics(currentDownloadFilter ?? new DownloadItemFilter(), cancellationToken));
+	}
+	
+	public async Task OnClickDeleteOrphaned() {
+		const string Title = "Delete Orphaned Downloads";
+		
+		try {
+			await ProgressDialog.Show(window, Title, async (_, callback) => {
+				await callback.UpdateIndeterminate("Searching for orphaned downloads...");
+				
+				HashSet<string> reachableNormalizedUrls = [];
+				HashSet<string> orphanedNormalizedUrls = [];
+				
+				await foreach (FileUrl fileUrl in state.Db.Downloads.FindReachableFiles()) {
+					reachableNormalizedUrls.Add(fileUrl.NormalizedUrl);
+				}
+				
+				await foreach (Download download in state.Db.Downloads.Get()) {
+					string normalizedUrl = download.NormalizedUrl;
+					if (!reachableNormalizedUrls.Contains(normalizedUrl)) {
+						orphanedNormalizedUrls.Add(normalizedUrl);
+					}
+				}
+				
+				if (orphanedNormalizedUrls.Count == 0) {
+					await Dialog.ShowOk(window, Title, "No orphaned downloads found.");
+					return;
+				}
+				
+				if (await Dialog.ShowYesNo(window, Title, orphanedNormalizedUrls.Count + " orphaned download(s) will be removed from this database. This action cannot be undone. Proceed?") != DialogResult.YesNo.Yes) {
+					return;
+				}
+				
+				await callback.UpdateIndeterminate("Deleting orphaned downloads...");
+				await state.Db.Downloads.Remove(orphanedNormalizedUrls);
+				RecomputeDownloadStatistics();
+				
+				if (await Dialog.ShowYesNo(window, Title, "Orphaned downloads deleted. Vacuum database now to reclaim space?") != DialogResult.YesNo.Yes) {
+					return;
+				}
+				
+				await callback.UpdateIndeterminate("Vacuuming database...");
+				await state.Db.Vacuum();
+			});
+		} catch (Exception e) {
+			Log.Error("Could not delete orphaned downloads.", e);
+			await Dialog.ShowOk(window, Title, "Could not delete orphaned downloads: " + e.Message);
+		}
+	}
+	
+	public async Task OnClickExportAll() {
+		const string Title = "Export Downloaded Files";
+		
+		string[] folders = await window.StorageProvider.OpenFolders(new FolderPickerOpenOptions {
+			Title = Title,
+			AllowMultiple = false,
+		});
+		
+		if (folders.Length != 1) {
+			return;
+		}
+		
+		string folderPath = folders[0];
+		
+		DownloadExporter exporter = new DownloadExporter(state.Db, folderPath);
+		DownloadExporter.Result result;
+		try {
+			result = await ProgressDialog.Show(window, Title, async (_, callback) => {
+				await callback.UpdateIndeterminate("Exporting downloaded files...");
+				return await exporter.Export(new ExportProgressReporter(callback));
+			});
+		} catch (Exception e) {
+			Log.Error("Could not export downloaded files.", e);
+			await Dialog.ShowOk(window, Title, "Could not export downloaded files: " + e.Message);
+			return;
+		}
+		
+		string messageStart = "Exported " + result.SuccessfulCount.Pluralize("file");
+		
+		if (result.FailedCount > 0L) {
+			await Dialog.ShowOk(window, Title, messageStart + " (" + result.FailedCount.Format() + " failed).");
+		}
+		else {
+			await Dialog.ShowOk(window, Title, messageStart + ".");
+		}
+	}
+	
+	private sealed class ExportProgressReporter(IProgressCallback callback) : DownloadExporter.IProgressReporter {
+		public Task ReportProgress(long processedCount, long totalCount) {
+			return callback.Update("Exporting downloaded files...", processedCount, totalCount);
+		}
+	}
+	
+	private void UpdateStatistics(DownloadStatusStatistics statusStatistics) {
+		statisticsPending.Items = statusStatistics.PendingCount;
+		statisticsPending.Size = statusStatistics.PendingTotalSize;
+		statisticsPending.HasFilesWithUnknownSize = statusStatistics.PendingWithUnknownSizeCount > 0;
+		
+		statisticsDownloaded.Items = statusStatistics.SuccessfulCount;
+		statisticsDownloaded.Size = statusStatistics.SuccessfulTotalSize;
+		statisticsDownloaded.HasFilesWithUnknownSize = statusStatistics.SuccessfulWithUnknownSizeCount > 0;
+		
+		statisticsFailed.Items = statusStatistics.FailedCount;
+		statisticsFailed.Size = statusStatistics.FailedTotalSize;
+		statisticsFailed.HasFilesWithUnknownSize = statusStatistics.FailedWithUnknownSizeCount > 0;
+		
+		statisticsSkipped.Items = statusStatistics.SkippedCount;
+		statisticsSkipped.Size = statusStatistics.SkippedTotalSize;
+		statisticsSkipped.HasFilesWithUnknownSize = statusStatistics.SkippedWithUnknownSizeCount > 0;
+		
+		HasSuccessfulDownloads = statusStatistics.SuccessfulCount > 0;
+		HasFailedDownloads = statusStatistics.FailedCount > 0;
+	}
+	
+	public sealed partial class StatisticsRow(string state) {
+		public string State { get; } = state;
+		
+		[Notify]
+		private int items;
+		
+		[Notify]
+		private ulong? size;
+		
+		[Notify]
+		private bool hasFilesWithUnknownSize;
+		
+		[DependsOn(nameof(Size), nameof(HasFilesWithUnknownSize))]
+		public string SizeText {
+			get {
+				if (size == null) {
+					return "-";
+				}
+				else if (hasFilesWithUnknownSize) {
+					return "\u2265 " + BytesValueConverter.Convert(size.Value);
+				}
+				else {
+					return BytesValueConverter.Convert(size.Value);
+				}
+			}
+		}
+	}
+}

app/Desktop/Main/Pages/TrackingPage.axaml

@@ -0,0 +1,54 @@
+<UserControl xmlns="https://github.com/avaloniaui"
+             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"
+             xmlns:pages="clr-namespace:DHT.Desktop.Main.Pages"
+             mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
+             x:Class="DHT.Desktop.Main.Pages.TrackingPage"
+             x:DataType="pages:TrackingPageModel">
+
+    <Design.DataContext>
+        <pages:TrackingPageModel />
+    </Design.DataContext>
+
+    <UserControl.Styles>
+        <Style Selector="TextBlock">
+            <Setter Property="TextWrapping" Value="Wrap" />
+        </Style>
+    </UserControl.Styles>
+
+    <StackPanel Spacing="20">
+        <Expander Header="Method 1: Manual" IsExpanded="True">
+            <StackPanel Orientation="Vertical" Spacing="10">
+                <TextBlock>
+                    <TextBlock.Text>
+                        <MultiBinding StringFormat="Use {0} to open Dev Tools in your browser or the Discord app, copy the tracking script, and paste it into the console.">
+                            <Binding Path="OpenDevToolsShortcutText" />
+                        </MultiBinding>
+                    </TextBlock.Text>
+                </TextBlock>
+                <Button x:Name="CopyTrackingScript" Click="CopyTrackingScriptButton_OnClick">Copy Tracking Script</Button>
+                <TextBlock Margin="0 5 0 0">
+                    By default, the Discord app blocks the Dev Tools shortcut. The button below changes a hidden setting to unblock the shortcut.
+                </TextBlock>
+                <Button Command="{Binding OnClickToggleAppDevTools}" Content="{Binding ToggleAppDevToolsButtonText}" IsEnabled="{Binding IsToggleAppDevToolsButtonEnabled}" />
+            </StackPanel>
+        </Expander>
+        <Expander Header="Method 2: Userscript" IsExpanded="True">
+            <StackPanel Orientation="Vertical" Spacing="10">
+                <TextBlock>
+                    Requires a userscript manager in your browser. The userscript adds a DHT icon next to the Help icon on Discord.
+                    If the icon does not appear, update this app and reinstall the userscript.
+                </TextBlock>
+                <TextBlock>
+                    Copy the Connection Code, click the DHT icon, and paste the code into the prompt.
+                </TextBlock>
+                <WrapPanel ItemSpacing="10" LineSpacing="10">
+                    <Button Command="{Binding OnClickInstallOrUpdateUserscript}">Install or Update Userscript</Button>
+                    <Button x:Name="CopyConnectionCode" Click="CopyConnectionScriptButton_OnClick">Copy Connection Code</Button>
+                </WrapPanel>
+            </StackPanel>
+        </Expander>
+    </StackPanel>
+
+</UserControl>

app/Desktop/Main/Pages/TrackingPage.axaml.cs

@@ -0,0 +1,45 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Interactivity;
+
+namespace DHT.Desktop.Main.Pages;
+
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class TrackingPage : UserControl {
+	private readonly HashSet<Button> copyingButtons = new (ReferenceEqualityComparer.Instance);
+	
+	public TrackingPage() {
+		InitializeComponent();
+	}
+	
+	public async void CopyTrackingScriptButton_OnClick(object? sender, RoutedEventArgs e) {
+		await HandleCopyButton(CopyTrackingScript, "Script Copied!", static model => model.OnClickCopyTrackingScript());
+	}
+	
+	public async void CopyConnectionScriptButton_OnClick(object? sender, RoutedEventArgs e) {
+		await HandleCopyButton(CopyConnectionCode, "Code Copied!", static model => model.OnClickCopyConnectionCode());
+	}
+	
+	private async Task HandleCopyButton(Button button, string copiedText, Func<TrackingPageModel, Task<bool>> onClick) {
+		if (DataContext is TrackingPageModel model) {
+			object? originalText = button.Content;
+			button.MinWidth = button.Bounds.Width;
+			
+			if (await onClick(model) && copyingButtons.Add(button)) {
+				button.IsEnabled = false;
+				button.Content = copiedText;
+				
+				try {
+					await Task.Delay(TimeSpan.FromSeconds(2));
+				} finally {
+					copyingButtons.Remove(button);
+					button.IsEnabled = true;
+					button.Content = originalText;
+				}
+			}
+		}
+	}
+}