Release v44.0

Closes #165

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

@@ -9,15 +9,15 @@
         <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/AttachmentFilterPanel.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/MainWindow.axaml" value="Desktop/Desktop.csproj" />
         <entry key="Desktop/Main/Pages/AdvancedPage.axaml" value="Desktop/Desktop.csproj" />
-        <entry key="Desktop/Main/Pages/AttachmentsPage.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" />
@@ -25,4 +25,4 @@
       </map>
     </option>
   </component>
-</project>
+</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>
@@ -26,10 +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>
-    <HSQLCodeStyleSettings version="6">
+    <HSQLCodeStyleSettings version="7">
       <option name="USE_GENERIC_STYLE" value="true" />
     </HSQLCodeStyleSettings>
     <HTMLCodeStyleSettings>
@@ -85,10 +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>
@@ -98,7 +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>
@@ -116,7 +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>
@@ -143,13 +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" />
@@ -173,9 +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">
@@ -203,6 +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" />
@@ -282,6 +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" />
@@ -342,7 +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" />
@@ -357,6 +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>
@@ -367,13 +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" />
@@ -427,6 +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>
@@ -442,4 +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/Desktop/Arguments.cs

@@ -1,29 +1,31 @@
 using System;
+using System.Collections.Generic;
 using DHT.Utils.Logging;
 
 namespace DHT.Desktop;
 
 sealed class Arguments {
 	private static readonly Log Log = Log.ForType<Arguments>();
-	
+
 	private const int FirstArgument = 1;
 
-	public static Arguments Empty => new(Array.Empty<string>());
+	public static Arguments Empty => new (Array.Empty<string>());
 
 	public bool Console { get; }
 	public string? DatabaseFile { get; }
 	public ushort? ServerPort { get; }
 	public string? ServerToken { get; }
+	public byte? ConcurrentDownloads { get; }
 
-	public Arguments(string[] args) {
-		for (int i = FirstArgument; i < args.Length; i++) {
+	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;
@@ -35,7 +37,7 @@ sealed class Arguments {
 				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;
 			}
@@ -49,11 +51,11 @@ sealed class Arguments {
 					continue;
 
 				case "-port": {
-					if (ushort.TryParse(value, out var port)) {
-						ServerPort = port;
+					if (!ushort.TryParse(value, out var port)) {
+						Log.Warn("Invalid port number: " + value);
 					}
 					else {
-						Log.Warn("Invalid port number: " + value);
+						ServerPort = port;
 					}
 
 					continue;
@@ -62,6 +64,20 @@ sealed class Arguments {
 				case "-token":
 					ServerToken = value;
 					continue;
+				
+				case "-concurrentdownloads":
+					if (!ulong.TryParse(value, out var 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);

app/Desktop/Common/BytesValueConverter.cs

@@ -19,17 +19,17 @@ sealed class BytesValueConverter : IValueConverter {
 		}
 	}
 
-	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));

app/Desktop/Common/DatabaseGui.cs

@@ -1,17 +1,15 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
-using System.Threading;
 using System.Threading.Tasks;
 using Avalonia.Controls;
 using Avalonia.Platform.Storage;
-using Avalonia.Threading;
 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.Utils;
+using DHT.Server.Database.Sqlite.Schema;
 using DHT.Utils.Logging;
 
 namespace DHT.Desktop.Common;
@@ -45,15 +43,10 @@ static class DatabaseGui {
 	}
 
 	public static async Task<IDatabaseFile?> TryOpenOrCreateDatabaseFromPath(string path, Window window, ISchemaUpgradeCallbacks schemaUpgradeCallbacks) {
-		var prevSynchronizationContext = SynchronizationContext.Current;
-		SynchronizationContext.SetSynchronizationContext(new AvaloniaSynchronizationContext());
-		var taskScheduler = TaskScheduler.FromCurrentSynchronizationContext();
-		SynchronizationContext.SetSynchronizationContext(prevSynchronizationContext);
-		
 		IDatabaseFile? file = null;
 
 		try {
-			file = await SqliteDatabaseFile.OpenOrCreate(path, schemaUpgradeCallbacks, taskScheduler);
+			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) {

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/Desktop.csproj

@@ -15,14 +15,15 @@
   </PropertyGroup>
   
   <ItemGroup>
-    <PackageReference Include="Avalonia" Version="11.0.6" />
-    <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.0.6" />
-    <PackageReference Include="Avalonia.Controls.ItemsRepeater" Version="11.0.6" />
-    <PackageReference Include="Avalonia.Desktop" Version="11.0.6" />
-    <PackageReference Include="Avalonia.Diagnostics" Version="11.0.6" Condition=" '$(Configuration)' == 'Debug' " />
-    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.0.6" />
-    <PackageReference Include="Avalonia.ReactiveUI" Version="11.0.6" />
-    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.6" />
+    <PackageReference Include="Avalonia" Version="11.0.11" />
+    <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.0.11" />
+    <PackageReference Include="Avalonia.Controls.ItemsRepeater" Version="11.0.11" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.0.11" />
+    <PackageReference Include="Avalonia.Diagnostics" Version="11.0.11" Condition=" '$(Configuration)' == 'Debug' " />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.0.11" />
+    <PackageReference Include="Avalonia.ReactiveUI" Version="11.0.11" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.11" />
+    <PackageReference Include="CommunityToolkit.Mvvm" Version="999.0.0-build.0.g0d941a6a62" />
   </ItemGroup>
   
   <ItemGroup>
@@ -31,10 +32,6 @@
   
   <ItemGroup>
     <Compile Include="..\Version.cs" Link="Version.cs" />
-    <Compile Update="Dialogs\TextBox\TextBoxDialog.axaml.cs">
-      <DependentUpon>CheckBoxDialog.axaml</DependentUpon>
-      <SubType>Code</SubType>
-    </Compile>
   </ItemGroup>
   
   <ItemGroup>
@@ -42,11 +39,6 @@
     <EmbeddedResource Include="Resources/tracker-loader.js">
       <LogicalName>tracker-loader.js</LogicalName>
     </EmbeddedResource>
-    <EmbeddedResource Include="../Resources/Viewer/**">
-      <LogicalName>Viewer\%(RecursiveDir)%(Filename)%(Extension)</LogicalName>
-      <Link>Resources/Viewer/%(RecursiveDir)%(Filename)%(Extension)</Link>
-      <Visible>false</Visible>
-    </EmbeddedResource>
   </ItemGroup>
   
 </Project>

app/Desktop/Dialogs/CheckBox/CheckBoxDialog.axaml

@@ -38,7 +38,7 @@
             <ItemsRepeater ItemsSource="{Binding Items}">
                 <ItemsRepeater.ItemTemplate>
                     <DataTemplate>
-                        <CheckBox IsChecked="{Binding Checked}">
+                        <CheckBox IsChecked="{Binding IsChecked}">
                             <Label>
                                 <TextBlock Text="{Binding Title}" TextWrapping="Wrap" />
                             </Label>

app/Desktop/Dialogs/CheckBox/CheckBoxDialogModel.cs

@@ -2,11 +2,11 @@ using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
-using DHT.Utils.Models;
+using CommunityToolkit.Mvvm.ComponentModel;
 
 namespace DHT.Desktop.Dialogs.CheckBox;
 
-class CheckBoxDialogModel : BaseModel {
+class CheckBoxDialogModel : ObservableObject {
 	public string Title { get; init; } = "";
 
 	private IReadOnlyList<CheckBoxItem> items = Array.Empty<CheckBoxItem>();
@@ -29,8 +29,8 @@ class CheckBoxDialogModel : BaseModel {
 
 	private bool pauseCheckEvents = false;
 
-	public bool AreAllSelected => Items.All(static item => item.Checked);
-	public bool AreNoneSelected => Items.All(static item => !item.Checked);
+	public bool AreAllSelected => Items.All(static item => item.IsChecked);
+	public bool AreNoneSelected => Items.All(static item => !item.IsChecked);
 
 	public void SelectAll() => SetAllChecked(true);
 	public void SelectNone() => SetAllChecked(false);
@@ -39,7 +39,7 @@ class CheckBoxDialogModel : BaseModel {
 		pauseCheckEvents = true;
 
 		foreach (var item in Items) {
-			item.Checked = isChecked;
+			item.IsChecked = isChecked;
 		}
 
 		pauseCheckEvents = false;
@@ -52,16 +52,16 @@ class CheckBoxDialogModel : BaseModel {
 	}
 
 	private void OnItemPropertyChanged(object? sender, PropertyChangedEventArgs e) {
-		if (!pauseCheckEvents && e.PropertyName == nameof(CheckBoxItem.Checked)) {
+		if (!pauseCheckEvents && e.PropertyName == nameof(CheckBoxItem.IsChecked)) {
 			UpdateBulkButtons();
 		}
 	}
 }
 
 sealed class CheckBoxDialogModel<T> : CheckBoxDialogModel {
-	public new IReadOnlyList<CheckBoxItem<T>> Items { get; }
+	private new IReadOnlyList<CheckBoxItem<T>> Items { get; }
 
-	public IEnumerable<CheckBoxItem<T>> SelectedItems => Items.Where(static item => item.Checked);
+	public IEnumerable<CheckBoxItem<T>> SelectedItems => Items.Where(static item => item.IsChecked);
 
 	public CheckBoxDialogModel(IEnumerable<CheckBoxItem<T>> items) {
 		this.Items = new List<CheckBoxItem<T>>(items);

app/Desktop/Dialogs/CheckBox/CheckBoxItem.cs

@@ -1,17 +1,13 @@
-using DHT.Utils.Models;
+using CommunityToolkit.Mvvm.ComponentModel;
 
 namespace DHT.Desktop.Dialogs.CheckBox;
 
-class CheckBoxItem : BaseModel {
+partial class CheckBoxItem : ObservableObject {
 	public string Title { get; init; } = "";
 	public object? Item { get; init; } = null;
 
+	[ObservableProperty]
 	private bool isChecked = false;
-
-	public bool Checked {
-		get => isChecked;
-		set => Change(ref isChecked, value);
-	}
 }
 
 sealed class CheckBoxItem<T> : CheckBoxItem {

app/Desktop/Dialogs/Progress/ProgressDialogModel.cs

@@ -4,11 +4,10 @@ using System.Linq;
 using System.Threading.Tasks;
 using Avalonia.Threading;
 using DHT.Desktop.Common;
-using DHT.Utils.Models;
 
 namespace DHT.Desktop.Dialogs.Progress;
 
-sealed class ProgressDialogModel : BaseModel {
+sealed class ProgressDialogModel {
 	public string Title { get; init; } = "";
 
 	public IReadOnlyList<ProgressItem> Items { get; } = Array.Empty<ProgressItem>();

app/Desktop/Dialogs/Progress/ProgressItem.cs

@@ -1,18 +1,12 @@
-using DHT.Utils.Models;
+using CommunityToolkit.Mvvm.ComponentModel;
 
 namespace DHT.Desktop.Dialogs.Progress;
 
-sealed class ProgressItem : BaseModel {
+sealed partial class ProgressItem : ObservableObject {
+	[ObservableProperty(Setter = Access.Private)]
+	[NotifyPropertyChangedFor(nameof(Opacity))]
 	private bool isVisible = false;
 
-	public bool IsVisible {
-		get => isVisible;
-		private set {
-			Change(ref isVisible, value);
-			OnPropertyChanged(nameof(Opacity));
-		}
-	}
-	
 	public double Opacity => IsVisible ? 1.0 : 0.0;
 
 	private string message = "";
@@ -20,29 +14,17 @@ sealed class ProgressItem : BaseModel {
 	public string Message {
 		get => message;
 		set {
-			Change(ref message, value);
+			SetProperty(ref message, value);
 			IsVisible = !string.IsNullOrEmpty(value);
 		}
 	}
 
+	[ObservableProperty]
 	private string items = "";
 
-	public string Items {
-		get => items;
-		set => Change(ref items, value);
-	}
-
+	[ObservableProperty]
 	private int progress = 0;
 
-	public int Progress {
-		get => progress;
-		set => Change(ref progress, value);
-	}
-	
+	[ObservableProperty]
 	private bool isIndeterminate;
-
-	public bool IsIndeterminate {
-		get => isIndeterminate;
-		set => Change(ref isIndeterminate, value);
-	}
 }

app/Desktop/Dialogs/TextBox/TextBoxDialogModel.cs

@@ -2,11 +2,11 @@ using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
-using DHT.Utils.Models;
+using CommunityToolkit.Mvvm.ComponentModel;
 
 namespace DHT.Desktop.Dialogs.TextBox;
 
-class TextBoxDialogModel : BaseModel {
+class TextBoxDialogModel : ObservableObject {
 	public string Title { get; init; } = "";
 	public string Description { get; init; } = "";
 
@@ -36,7 +36,7 @@ class TextBoxDialogModel : BaseModel {
 }
 
 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);
 

app/Desktop/Dialogs/TextBox/TextBoxItem.cs

@@ -1,11 +1,11 @@
 using System;
 using System.Collections;
 using System.ComponentModel;
-using DHT.Utils.Models;
+using CommunityToolkit.Mvvm.ComponentModel;
 
 namespace DHT.Desktop.Dialogs.TextBox;
 
-class TextBoxItem : BaseModel, INotifyDataErrorInfo {
+class TextBoxItem : ObservableObject, INotifyDataErrorInfo {
 	public string Title { get; init; } = "";
 	public object? Item { get; init; } = null;
 		
@@ -17,7 +17,7 @@ class TextBoxItem : BaseModel, INotifyDataErrorInfo {
 	public string Value {
 		get => this.value;
 		set {
-			Change(ref this.value, value);
+			SetProperty(ref this.value, value);
 			ErrorsChanged?.Invoke(this, new DataErrorsChangedEventArgs(nameof(Value)));
 		}
 	}

app/Desktop/Discord/DiscordAppSettings.cs

@@ -39,7 +39,7 @@ static class DiscordAppSettings {
 
 	public static async Task<bool?> AreDevToolsEnabled() {
 		try {
-			var settingsJson = await ReadSettingsJson().ConfigureAwait(false);
+			var settingsJson = await ReadSettingsJson();
 			return AreDevToolsEnabled(settingsJson);
 		} catch (Exception e) {
 			Log.Error("Cannot read settings file.");

app/Desktop/Discord/DiscordAppSettingsJsonContext.cs

@@ -5,4 +5,4 @@ namespace DHT.Desktop.Discord;
 
 [JsonSourceGenerationOptions(GenerationMode = JsonSourceGenerationMode.Default, WriteIndented = true)]
 [JsonSerializable(typeof(JsonObject))]
-sealed partial class DiscordAppSettingsJsonContext : JsonSerializerContext {}
+sealed partial class DiscordAppSettingsJsonContext : JsonSerializerContext;

app/Desktop/Main/AboutWindow.axaml

@@ -3,12 +3,12 @@
         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="480" d:DesignHeight="295"
+        mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="360"
         x:Class="DHT.Desktop.Main.AboutWindow"
         x:DataType="main:AboutWindowModel"
         Title="About Discord History Tracker"
         Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
-        Width="480" Height="295" CanResize="False"
+        Width="480" Height="360" CanResize="False"
         WindowStartupLocation="CenterOwner">
 
     <Design.DataContext>
@@ -39,10 +39,11 @@
 
         <StackPanel>
             <Button Command="{Binding ShowOfficialWebsite}">Official Website</Button>
+            <Button Command="{Binding ShowIssueTracker}">Issue Tracker</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">
+        <Grid RowDefinitions="Auto,5,Auto,Auto,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>
@@ -55,13 +56,21 @@
             <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="4" Grid.Column="0">MVVM Toolkit</TextBlock>
+            <TextBlock Grid.Row="4" Grid.Column="1">MIT</TextBlock>
+            <Button Grid.Row="4" Grid.Column="2" Command="{Binding ShowLibraryCommunityToolkit}">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 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>
+            <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 ShowLibrarySqliteAdoNet}">NuGet</Button>
+            
+            <TextBlock Grid.Row="7" Grid.Column="0">Rx.NET</TextBlock>
+            <TextBlock Grid.Row="7" Grid.Column="1">MIT</TextBlock>
+            <Button Grid.Row="7" Grid.Column="2" Command="{Binding ShowLibraryRxNet}">GitHub</Button>
         </Grid>
 
     </StackPanel>

app/Desktop/Main/AboutWindowModel.cs

@@ -1,33 +1,41 @@
-using System.Diagnostics;
+using DHT.Desktop.Common;
 
 namespace DHT.Desktop.Main;
 
 sealed class AboutWindowModel {
 	public void ShowOfficialWebsite() {
-		OpenUrl("https://dht.chylex.com");
+		SystemUtils.OpenUrl(Program.Website);
 	}
 
+	public void ShowIssueTracker() {
+		SystemUtils.OpenUrl("https://github.com/chylex/Discord-History-Tracker/issues");
+	}
+	
 	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");
+		SystemUtils.OpenUrl("https://github.com/chylex/Discord-History-Tracker");
 	}
 
 	public void ShowLibraryNetCore() {
-		OpenUrl("https://github.com/dotnet/core");
+		SystemUtils.OpenUrl("https://github.com/dotnet/core");
 	}
 
-	private static void OpenUrl(string url) {
-		Process.Start(new ProcessStartInfo { FileName = url, UseShellExecute = true });
+	public void ShowLibraryAvalonia() {
+		SystemUtils.OpenUrl("https://www.nuget.org/packages/Avalonia");
+	}
+
+	public void ShowLibraryCommunityToolkit() {
+		SystemUtils.OpenUrl("https://github.com/CommunityToolkit/dotnet");
+	}
+
+	public void ShowLibrarySqlite() {
+		SystemUtils.OpenUrl("https://www.sqlite.org");
+	}
+
+	public void ShowLibrarySqliteAdoNet() {
+		SystemUtils.OpenUrl("https://www.nuget.org/packages/Microsoft.Data.Sqlite");
+	}
+
+	public void ShowLibraryRxNet() {
+		SystemUtils.OpenUrl("https://github.com/dotnet/reactive");
 	}
 }

app/Desktop/Main/Controls/AttachmentFilterPanelModel.cs

@@ -1,131 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Threading.Tasks;
-using DHT.Desktop.Common;
-using DHT.Server;
-using DHT.Server.Data.Filters;
-using DHT.Server.Database;
-using DHT.Utils.Models;
-using DHT.Utils.Tasks;
-
-namespace DHT.Desktop.Main.Controls;
-
-sealed class AttachmentFilterPanelModel : BaseModel, IDisposable {
-	public sealed record Unit(string Name, uint Scale);
-
-	private static readonly Unit[] AllUnits = [
-		new Unit("B", 1),
-		new Unit("kB", 1024),
-		new Unit("MB", 1024 * 1024)
-	];
-
-	private static readonly HashSet<string> FilterProperties = [
-		nameof(LimitSize),
-		nameof(MaximumSize),
-		nameof(MaximumSizeUnit)
-	];
-
-	public string FilterStatisticsText { get; private set; } = "";
-
-	private bool limitSize = false;
-	private ulong maximumSize = 0L;
-	private Unit maximumSizeUnit = AllUnits[0];
-
-	public bool LimitSize {
-		get => limitSize;
-		set => Change(ref limitSize, value);
-	}
-
-	public ulong MaximumSize {
-		get => maximumSize;
-		set => Change(ref maximumSize, value);
-	}
-
-	public Unit MaximumSizeUnit {
-		get => maximumSizeUnit;
-		set => Change(ref maximumSizeUnit, value);
-	}
-
-	public IEnumerable<Unit> Units => AllUnits;
-
-	private readonly State state;
-	private readonly string verb;
-
-	private readonly RestartableTask<long> matchingAttachmentCountTask;
-	private long? matchingAttachmentCount;
-	private long? totalAttachmentCount;
-
-	[Obsolete("Designer")]
-	public AttachmentFilterPanelModel() : this(State.Dummy) {}
-
-	public AttachmentFilterPanelModel(State state, string verb = "Matches") {
-		this.state = state;
-		this.verb = verb;
-
-		this.matchingAttachmentCountTask = new RestartableTask<long>(SetAttachmentCounts, TaskScheduler.FromCurrentSynchronizationContext());
-
-		UpdateFilterStatistics();
-
-		PropertyChanged += OnPropertyChanged;
-		state.Db.Statistics.PropertyChanged += OnDbStatisticsChanged;
-	}
-
-	public void Dispose() {
-		state.Db.Statistics.PropertyChanged -= OnDbStatisticsChanged;
-	}
-
-	private void OnPropertyChanged(object? sender, PropertyChangedEventArgs e) {
-		if (e.PropertyName != null && FilterProperties.Contains(e.PropertyName)) {
-			UpdateFilterStatistics();
-		}
-	}
-
-	private void OnDbStatisticsChanged(object? sender, PropertyChangedEventArgs e) {
-		if (e.PropertyName == nameof(DatabaseStatistics.TotalAttachments)) {
-			totalAttachmentCount = state.Db.Statistics.TotalAttachments;
-			UpdateFilterStatistics();
-		}
-	}
-
-	private void UpdateFilterStatistics() {
-		var filter = CreateFilter();
-		if (filter.IsEmpty) {
-			matchingAttachmentCountTask.Cancel();
-			matchingAttachmentCount = totalAttachmentCount;
-			UpdateFilterStatisticsText();
-		}
-		else {
-			matchingAttachmentCount = null;
-			UpdateFilterStatisticsText();
-			matchingAttachmentCountTask.Restart(cancellationToken => state.Db.Downloads.CountAttachments(filter, cancellationToken));
-		}
-	}
-
-	private void SetAttachmentCounts(long matchingAttachmentCount) {
-		this.matchingAttachmentCount = matchingAttachmentCount;
-		UpdateFilterStatisticsText();
-	}
-
-	private void UpdateFilterStatisticsText() {
-		var matchingAttachmentCountStr = matchingAttachmentCount?.Format() ?? "(...)";
-		var totalAttachmentCountStr = totalAttachmentCount?.Format() ?? "(...)";
-
-		FilterStatisticsText = verb + " " + matchingAttachmentCountStr + " out of " + totalAttachmentCountStr + " attachment" + (totalAttachmentCount is null or 1 ? "." : "s.");
-		OnPropertyChanged(nameof(FilterStatisticsText));
-	}
-
-	public AttachmentFilter CreateFilter() {
-		AttachmentFilter 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/DownloadItemFilterPanel.axaml

@@ -4,11 +4,11 @@
              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.AttachmentFilterPanel"
-             x:DataType="controls:AttachmentFilterPanelModel">
+             x:Class="DHT.Desktop.Main.Controls.DownloadItemFilterPanel"
+             x:DataType="controls:DownloadItemFilterPanelModel">
 
     <Design.DataContext>
-        <controls:AttachmentFilterPanelModel />
+        <controls:DownloadItemFilterPanelModel />
     </Design.DataContext>
 
     <UserControl.Styles>

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

@@ -4,8 +4,8 @@ using Avalonia.Controls;
 namespace DHT.Desktop.Main.Controls;
 
 [SuppressMessage("ReSharper", "MemberCanBeInternal")]
-public sealed partial class AttachmentFilterPanel : UserControl {
-	public AttachmentFilterPanel() {
+public sealed partial class DownloadItemFilterPanel : UserControl {
+	public DownloadItemFilterPanel() {
 		InitializeComponent();
 	}
 }

app/Desktop/Main/Controls/DownloadItemFilterPanelModel.cs

@@ -0,0 +1,172 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Linq;
+using System.Reactive.Linq;
+using System.Threading.Tasks;
+using Avalonia.ReactiveUI;
+using CommunityToolkit.Mvvm.ComponentModel;
+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;
+
+namespace DHT.Desktop.Main.Controls;
+
+sealed partial class DownloadItemFilterPanelModel : ObservableObject, 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", 1),
+		new Unit("kB", 1024),
+		new Unit("MB", 1024 * 1024)
+	];
+
+	private static readonly HashSet<string> FilterProperties = [
+		nameof(LimitSize),
+		nameof(MaximumSize),
+		nameof(MaximumSizeUnit)
+	];
+
+	public string FilterStatisticsText { get; private set; } = "";
+
+	[ObservableProperty]
+	private bool limitSize = false;
+	
+	[ObservableProperty]
+	private ulong maximumSize = 0UL;
+	
+	[ObservableProperty]
+	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, 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");
+			Log.Error(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() {
+		var 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() {
+		var matchingItemCountStr = matchingItemCount?.Format() ?? "(...)";
+		var totalItemCountStr = totalItemCount?.Format() ?? "(...)";
+
+		FilterStatisticsText = verb + " " + matchingItemCountStr + " out of " + totalItemCountStr + " file" + (totalItemCount is null or 1 ? "." : "s.");
+		OnPropertyChanged(nameof(FilterStatisticsText));
+	}
+
+	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/MessageFilterPanelModel.cs

@@ -2,9 +2,12 @@ using System;
 using System.Collections.Generic;
 using System.ComponentModel;
 using System.Linq;
+using System.Reactive.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using Avalonia.Controls;
+using Avalonia.ReactiveUI;
+using CommunityToolkit.Mvvm.ComponentModel;
 using DHT.Desktop.Common;
 using DHT.Desktop.Dialogs.CheckBox;
 using DHT.Desktop.Dialogs.Message;
@@ -12,13 +15,11 @@ using DHT.Desktop.Dialogs.Progress;
 using DHT.Server;
 using DHT.Server.Data;
 using DHT.Server.Data.Filters;
-using DHT.Server.Database;
-using DHT.Utils.Models;
 using DHT.Utils.Tasks;
 
 namespace DHT.Desktop.Main.Controls;
 
-sealed class MessageFilterPanelModel : BaseModel, IDisposable {
+sealed partial class MessageFilterPanelModel : ObservableObject, IDisposable {
 	private static readonly HashSet<string> FilterProperties = [
 		nameof(FilterByDate),
 		nameof(StartDate),
@@ -35,70 +36,48 @@ sealed class MessageFilterPanelModel : BaseModel, IDisposable {
 
 	public bool HasAnyFilters => FilterByDate || FilterByChannel || FilterByUser;
 
+	[ObservableProperty]
 	private bool filterByDate = false;
+
+	[ObservableProperty]
 	private DateTime? startDate = null;
+
+	[ObservableProperty]
 	private DateTime? endDate = null;
+
+	[ObservableProperty]
 	private bool filterByChannel = false;
+
+	[ObservableProperty]
 	private HashSet<ulong>? includedChannels = null;
+
+	[ObservableProperty]
 	private bool filterByUser = false;
+
+	[ObservableProperty]
 	private HashSet<ulong>? includedUsers = null;
 
-	public bool FilterByDate {
-		get => filterByDate;
-		set => Change(ref filterByDate, value);
-	}
-
-	public DateTime? StartDate {
-		get => startDate;
-		set => Change(ref startDate, value);
-	}
-
-	public DateTime? EndDate {
-		get => endDate;
-		set => Change(ref endDate, value);
-	}
-
-	public bool FilterByChannel {
-		get => filterByChannel;
-		set => Change(ref filterByChannel, value);
-	}
-
-	public HashSet<ulong>? IncludedChannels {
-		get => includedChannels;
-		set => Change(ref includedChannels, value);
-	}
-
-	public bool FilterByUser {
-		get => filterByUser;
-		set => Change(ref filterByUser, value);
-	}
-
-	public HashSet<ulong>? IncludedUsers {
-		get => includedUsers;
-		set => Change(ref includedUsers, value);
-	}
-
+	[ObservableProperty]
 	private string channelFilterLabel = "";
 
-	public string ChannelFilterLabel {
-		get => channelFilterLabel;
-		set => Change(ref channelFilterLabel, value);
-	}
-
+	[ObservableProperty]
 	private string userFilterLabel = "";
 
-	public string UserFilterLabel {
-		get => userFilterLabel;
-		set => Change(ref userFilterLabel, value);
-	}
-
 	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) {}
@@ -109,18 +88,24 @@ sealed class MessageFilterPanelModel : BaseModel, IDisposable {
 		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;
-		state.Db.Statistics.PropertyChanged += OnDbStatisticsChanged;
 	}
 
 	public void Dispose() {
 		exportedMessageCountTask.Cancel();
-		state.Db.Statistics.PropertyChanged -= OnDbStatisticsChanged;
+		
+		messageCountSubscription.Dispose();
+		channelCountSubscription.Dispose();
+		userCountSubscription.Dispose();
 	}
 
 	private void OnPropertyChanged(object? sender, PropertyChangedEventArgs e) {
@@ -137,29 +122,41 @@ sealed class MessageFilterPanelModel : BaseModel, IDisposable {
 		}
 	}
 
-	private void OnDbStatisticsChanged(object? sender, PropertyChangedEventArgs e) {
-		if (e.PropertyName == nameof(DatabaseStatistics.TotalMessages)) {
-			totalMessageCount = state.Db.Statistics.TotalMessages;
-			UpdateFilterStatistics();
-		}
-		else if (e.PropertyName == nameof(DatabaseStatistics.TotalChannels)) {
-			UpdateChannelFilterLabel();
-		}
-		else if (e.PropertyName == nameof(DatabaseStatistics.TotalUsers)) {
-			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() {
-		long total = state.Db.Statistics.TotalChannels;
-		long included = FilterByChannel && IncludedChannels != null ? IncludedChannels.Count : total;
-		ChannelFilterLabel = "Selected " + included.Format() + " / " + total.Pluralize("channel") + ".";
+		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() {
-		long total = state.Db.Statistics.TotalUsers;
-		long included = FilterByUser && IncludedUsers != null ? IncludedUsers.Count : total;
-		UserFilterLabel = "Selected " + included.Format() + " / " + total.Pluralize("user") + ".";
+		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() {
@@ -224,13 +221,13 @@ sealed class MessageFilterPanelModel : BaseModel, IDisposable {
 
 				items.Add(new CheckBoxItem<ulong>(channelId) {
 					Title = title,
-					Checked = IncludedChannels == null || IncludedChannels.Contains(channelId)
+					IsChecked = IncludedChannels == null || IncludedChannels.Contains(channelId)
 				});
 			}
 
 			return items;
 		}
-		
+
 		const string Title = "Included Channels";
 
 		List<CheckBoxItem<ulong>> items;
@@ -252,12 +249,9 @@ sealed class MessageFilterPanelModel : BaseModel, IDisposable {
 			var checkBoxItems = new List<CheckBoxItem<ulong>>();
 
 			await foreach (var user in state.Db.Users.Get()) {
-				var name = user.Name;
-				var discriminator = user.Discriminator;
-
 				checkBoxItems.Add(new CheckBoxItem<ulong>(user.Id) {
-					Title = discriminator == null ? name : name + " #" + discriminator,
-					Checked = IncludedUsers == null || IncludedUsers.Contains(user.Id)
+					Title = user.DisplayName == null ? user.Name : $"{user.DisplayName} ({user.Name})",
+					IsChecked = IncludedUsers == null || IncludedUsers.Contains(user.Id)
 				});
 			}
 
@@ -265,7 +259,7 @@ sealed class MessageFilterPanelModel : BaseModel, IDisposable {
 		}
 
 		const string Title = "Included Users";
-		
+
 		List<CheckBoxItem<ulong>> items;
 		try {
 			items = await ProgressDialog.ShowIndeterminate(window, Title, "Loading users...", PrepareUserItems);

app/Desktop/Main/Controls/ServerConfigurationPanelModel.cs

@@ -2,47 +2,31 @@ using System;
 using System.Threading.Tasks;
 using Avalonia.Controls;
 using Avalonia.Threading;
+using CommunityToolkit.Mvvm.ComponentModel;
 using DHT.Desktop.Dialogs.Message;
 using DHT.Desktop.Server;
 using DHT.Server;
 using DHT.Server.Service;
 using DHT.Utils.Logging;
-using DHT.Utils.Models;
 
 namespace DHT.Desktop.Main.Controls;
 
-sealed class ServerConfigurationPanelModel : BaseModel, IDisposable {
+sealed partial class ServerConfigurationPanelModel : ObservableObject, IDisposable {
 	private static readonly Log Log = Log.ForType<ServerConfigurationPanelModel>();
 	
+	[ObservableProperty]
+	[NotifyPropertyChangedFor(nameof(HasMadeChanges))]
 	private string inputPort;
 
-	public string InputPort {
-		get => inputPort;
-		set {
-			Change(ref inputPort, value);
-			OnPropertyChanged(nameof(HasMadeChanges));
-		}
-	}
-
+	[ObservableProperty]
+	[NotifyPropertyChangedFor(nameof(HasMadeChanges))]
 	private string inputToken;
 
-	public string InputToken {
-		get => inputToken;
-		set {
-			Change(ref inputToken, value);
-			OnPropertyChanged(nameof(HasMadeChanges));
-		}
-	}
-
 	public bool HasMadeChanges => ServerConfiguration.Port.ToString() != InputPort || ServerConfiguration.Token != InputToken;
 
+	[ObservableProperty(Setter = Access.Private)]
 	private bool isToggleServerButtonEnabled = true;
 
-	public bool IsToggleServerButtonEnabled {
-		get => isToggleServerButtonEnabled;
-		set => Change(ref isToggleServerButtonEnabled, value);
-	}
-
 	public string ToggleServerButtonText => server.IsRunning ? "Stop Server" : "Start Server";
 
 	private readonly Window window;

app/Desktop/Main/Controls/StatusBar.axaml

@@ -45,17 +45,17 @@
         <Rectangle />
         <StackPanel Orientation="Vertical">
             <TextBlock Classes="label">Servers</TextBlock>
-            <TextBlock Classes="value" Text="{Binding DatabaseStatistics.TotalServers, Mode=OneWay, 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, Mode=OneWay, 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, Mode=OneWay, Converter={StaticResource NumberValueConverter}}" />
+            <TextBlock Classes="value" Text="{Binding MessageCount, Mode=OneWay, Converter={StaticResource NumberValueConverter}}" />
         </StackPanel>
     </StackPanel>
 

app/Desktop/Main/Controls/StatusBarModel.cs

@@ -1,15 +1,25 @@
 using System;
+using System.Reactive.Linq;
+using Avalonia.ReactiveUI;
 using Avalonia.Threading;
+using CommunityToolkit.Mvvm.ComponentModel;
 using DHT.Server;
-using DHT.Server.Database;
 using DHT.Server.Service;
-using DHT.Utils.Models;
 
 namespace DHT.Desktop.Main.Controls;
 
-sealed class StatusBarModel : BaseModel, IDisposable {
-	public DatabaseStatistics DatabaseStatistics { get; }
+sealed partial class StatusBarModel : ObservableObject, IDisposable {
+	[ObservableProperty(Setter = Access.Private)]
+	private long? serverCount;
+	
+	[ObservableProperty(Setter = Access.Private)]
+	private long? channelCount;
+	
+	[ObservableProperty(Setter = Access.Private)]
+	private long? messageCount;
 
+	[ObservableProperty(Setter = Access.Private)]
+	[NotifyPropertyChangedFor(nameof(ServerStatusText))]
 	private ServerManager.Status serverStatus;
 
 	public string ServerStatusText => serverStatus switch {
@@ -21,26 +31,33 @@ sealed class StatusBarModel : BaseModel, IDisposable {
 	};
 
 	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;
-		this.DatabaseStatistics = state.Db.Statistics;
+		
+		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 += OnServerStatusChanged;
 		serverStatus = state.Server.IsRunning ? ServerManager.Status.Started : ServerManager.Status.Stopped;
 	}
 
 	public void Dispose() {
+		serverCountSubscription.Dispose();
+		channelCountSubscription.Dispose();
+		messageCountSubscription.Dispose();
+		
 		state.Server.StatusChanged -= OnServerStatusChanged;
 	}
 
 	private void OnServerStatusChanged(object? sender, ServerManager.Status e) {
-		Dispatcher.UIThread.InvokeAsync(() => {
-			serverStatus = e;
-			OnPropertyChanged(nameof(ServerStatusText));
-		});
+		Dispatcher.UIThread.InvokeAsync(() => ServerStatus = e);
 	}
 }

app/Desktop/Main/MainWindow.axaml

@@ -8,7 +8,7 @@
         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"
         Closing="OnClosing">

app/Desktop/Main/MainWindow.axaml.cs

@@ -1,9 +1,7 @@
 using System;
 using System.Diagnostics.CodeAnalysis;
-using System.IO;
 using System.Threading.Tasks;
 using Avalonia.Controls;
-using DHT.Desktop.Main.Pages;
 using DHT.Utils.Logging;
 using JetBrains.Annotations;
 
@@ -43,13 +41,5 @@ public sealed partial class MainWindow : Window {
 				Log.Error("Caught exception while disposing window: " + ex);
 			}
 		}
-
-		foreach (var temporaryFile in ViewerPageModel.TemporaryFiles) {
-			try {
-				File.Delete(temporaryFile);
-			} catch (Exception) {
-				// ignored
-			}
-		}
 	}
 }

app/Desktop/Main/MainWindowModel.cs

@@ -3,24 +3,26 @@ using System.IO;
 using System.Runtime.InteropServices;
 using System.Threading.Tasks;
 using Avalonia.Controls;
+using CommunityToolkit.Mvvm.ComponentModel;
 using DHT.Desktop.Dialogs.Message;
 using DHT.Desktop.Main.Screens;
 using DHT.Desktop.Server;
 using DHT.Server;
 using DHT.Server.Database;
 using DHT.Utils.Logging;
-using DHT.Utils.Models;
 
 namespace DHT.Desktop.Main;
 
-sealed class MainWindowModel : BaseModel, IAsyncDisposable {
+sealed partial class MainWindowModel : ObservableObject, IAsyncDisposable {
 	private const string DefaultTitle = "Discord History Tracker";
 
 	private static readonly Log Log = Log.ForType<MainWindowModel>();
 
-	public string Title { get; private set; } = DefaultTitle;
+	[ObservableProperty(Setter = Access.Private)]
+	private string title = DefaultTitle;
 
-	public UserControl CurrentScreen { get; private set; }
+	[ObservableProperty(Setter = Access.Private)]
+	private UserControl currentScreen;
 
 	private readonly WelcomeScreen welcomeScreen;
 	private readonly WelcomeScreenModel welcomeScreenModel;
@@ -28,6 +30,7 @@ sealed class MainWindowModel : BaseModel, IAsyncDisposable {
 	private MainContentScreenModel? mainContentScreenModel;
 
 	private readonly Window window;
+	private readonly int? concurrentDownloads;
 
 	private State? state;
 
@@ -41,7 +44,7 @@ sealed class MainWindowModel : BaseModel, IAsyncDisposable {
 		welcomeScreenModel.DatabaseSelected += OnDatabaseSelected;
 
 		welcomeScreen = new WelcomeScreen { DataContext = welcomeScreenModel };
-		CurrentScreen = welcomeScreen;
+		currentScreen = welcomeScreen;
 
 		var dbFile = args.DatabaseFile;
 		if (!string.IsNullOrWhiteSpace(dbFile)) {
@@ -71,6 +74,8 @@ sealed class MainWindowModel : BaseModel, IAsyncDisposable {
 		if (args.ServerToken != null) {
 			ServerConfiguration.Token = args.ServerToken;
 		}
+		
+		concurrentDownloads = args.ConcurrentDownloads;
 	}
 
 	private async void OnDatabaseSelected(object? sender, IDatabaseFile db) {
@@ -78,7 +83,7 @@ sealed class MainWindowModel : BaseModel, IAsyncDisposable {
 		
 		await DisposeState();
 		
-		state = new State(db);
+		state = new State(db, concurrentDownloads);
 
 		try {
 			await state.Server.Start(ServerConfiguration.Port, ServerConfiguration.Token);
@@ -90,19 +95,18 @@ sealed class MainWindowModel : BaseModel, IAsyncDisposable {
 		mainContentScreenModel = new MainContentScreenModel(window, state);
 		mainContentScreenModel.DatabaseClosed += MainContentScreenModelOnDatabaseClosed;
 		
+		await mainContentScreenModel.Initialize();
+		
 		Title = Path.GetFileName(state.Db.Path) + " - " + DefaultTitle;
 		CurrentScreen = new MainContentScreen { DataContext = mainContentScreenModel };
 
-		OnPropertyChanged(nameof(Title));
-		OnPropertyChanged(nameof(CurrentScreen));
-
 		window.Focus();
 	}
 
 	private async void MainContentScreenModelOnDatabaseClosed(object? sender, EventArgs e) {
 		if (mainContentScreenModel != null) {
 			mainContentScreenModel.DatabaseClosed -= MainContentScreenModelOnDatabaseClosed;
-			mainContentScreenModel.Dispose();
+			await mainContentScreenModel.DisposeAsync();
 			mainContentScreenModel = null;
 		}
 
@@ -112,9 +116,6 @@ sealed class MainWindowModel : BaseModel, IAsyncDisposable {
 		CurrentScreen = welcomeScreen;
 
 		welcomeScreenModel.DatabaseSelected += OnDatabaseSelected;
-		
-		OnPropertyChanged(nameof(Title));
-		OnPropertyChanged(nameof(CurrentScreen));
 	}
 
 	private async Task DisposeState() {
@@ -125,7 +126,10 @@ sealed class MainWindowModel : BaseModel, IAsyncDisposable {
 	}
 
 	public async ValueTask DisposeAsync() {
-		mainContentScreenModel?.Dispose();
+		if (mainContentScreenModel != null) {
+			await mainContentScreenModel.DisposeAsync();
+		}
+		
 		await DisposeState();
 	}
 }

app/Desktop/Main/Pages/AdvancedPageModel.cs

@@ -5,11 +5,10 @@ using DHT.Desktop.Dialogs.Message;
 using DHT.Desktop.Dialogs.Progress;
 using DHT.Desktop.Main.Controls;
 using DHT.Server;
-using DHT.Utils.Models;
 
 namespace DHT.Desktop.Main.Pages;
 
-sealed class AdvancedPageModel : BaseModel, IDisposable {
+sealed class AdvancedPageModel : IDisposable {
 	public ServerConfigurationPanelModel ServerConfigurationModel { get; }
 	
 	private readonly Window window;

app/Desktop/Main/Pages/AttachmentsPageModel.cs

@@ -1,249 +0,0 @@
-using System;
-using System.Collections.Generic;
-using System.ComponentModel;
-using System.Reactive.Linq;
-using System.Threading.Tasks;
-using Avalonia.ReactiveUI;
-using DHT.Desktop.Common;
-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.Database;
-using DHT.Utils.Logging;
-using DHT.Utils.Models;
-using DHT.Utils.Tasks;
-
-namespace DHT.Desktop.Main.Pages;
-
-sealed class AttachmentsPageModel : BaseModel, IDisposable {
-	private static readonly Log Log = Log.ForType<AttachmentsPageModel>();
-
-	private static readonly DownloadItemFilter EnqueuedItemFilter = new () {
-		IncludeStatuses = new HashSet<DownloadStatus> {
-			DownloadStatus.Enqueued,
-			DownloadStatus.Downloading
-		}
-	};
-
-	private bool isToggleDownloadButtonEnabled = true;
-
-	public bool IsToggleDownloadButtonEnabled {
-		get => isToggleDownloadButtonEnabled;
-		set => Change(ref isToggleDownloadButtonEnabled, value);
-	}
-
-	public string ToggleDownloadButtonText => IsDownloading ? "Stop Downloading" : "Start Downloading";
-
-	private bool isRetryingFailedDownloads = false;
-
-	public bool IsRetryingFailedDownloads {
-		get => isRetryingFailedDownloads;
-		set {
-			isRetryingFailedDownloads = value;
-			OnPropertyChanged(nameof(IsRetryFailedOnDownloadsButtonEnabled));
-		}
-	}
-
-	public bool IsRetryFailedOnDownloadsButtonEnabled => !IsRetryingFailedDownloads && HasFailedDownloads;
-
-	public string DownloadMessage { get; set; } = "";
-	public double DownloadProgress => totalItemsToDownloadCount is null or 0 ? 0.0 : 100.0 * doneItemsCount / totalItemsToDownloadCount.Value;
-
-	public AttachmentFilterPanelModel FilterModel { get; }
-
-	private readonly StatisticsRow statisticsEnqueued = new ("Enqueued");
-	private readonly StatisticsRow statisticsDownloaded = new ("Downloaded");
-	private readonly StatisticsRow statisticsFailed = new ("Failed");
-	private readonly StatisticsRow statisticsSkipped = new ("Skipped");
-
-	public List<StatisticsRow> StatisticsRows => [
-		statisticsEnqueued,
-		statisticsDownloaded,
-		statisticsFailed,
-		statisticsSkipped
-	];
-
-	public bool IsDownloading => state.Downloader.IsDownloading;
-	public bool HasFailedDownloads => statisticsFailed.Items > 0;
-
-	private readonly State state;
-	private readonly ThrottledTask<int> enqueueDownloadItemsTask;
-	private readonly ThrottledTask<DownloadStatusStatistics> downloadStatisticsTask;
-
-	private IDisposable? finishedItemsSubscription;
-	private int doneItemsCount;
-	private int totalEnqueuedItemCount;
-	private int? totalItemsToDownloadCount;
-
-	public AttachmentsPageModel() : this(State.Dummy) {}
-
-	public AttachmentsPageModel(State state) {
-		this.state = state;
-
-		FilterModel = new AttachmentFilterPanelModel(state);
-
-		enqueueDownloadItemsTask = new ThrottledTask<int>(OnItemsEnqueued, TaskScheduler.FromCurrentSynchronizationContext());
-		downloadStatisticsTask = new ThrottledTask<DownloadStatusStatistics>(UpdateStatistics, TaskScheduler.FromCurrentSynchronizationContext());
-		RecomputeDownloadStatistics();
-
-		state.Db.Statistics.PropertyChanged += OnDbStatisticsChanged;
-	}
-
-	public void Dispose() {
-		state.Db.Statistics.PropertyChanged -= OnDbStatisticsChanged;
-		enqueueDownloadItemsTask.Dispose();
-		downloadStatisticsTask.Dispose();
-		finishedItemsSubscription?.Dispose();
-		FilterModel.Dispose();
-	}
-
-	private void OnDbStatisticsChanged(object? sender, PropertyChangedEventArgs e) {
-		if (e.PropertyName == nameof(DatabaseStatistics.TotalAttachments)) {
-			if (IsDownloading) {
-				EnqueueDownloadItemsLater();
-			}
-			else {
-				RecomputeDownloadStatistics();
-			}
-		}
-		else if (e.PropertyName == nameof(DatabaseStatistics.TotalDownloads)) {
-			RecomputeDownloadStatistics();
-		}
-	}
-
-	private async Task EnqueueDownloadItems() {
-		OnItemsEnqueued(await state.Db.Downloads.EnqueueDownloadItems(CreateAttachmentFilter()));
-	}
-
-	private void EnqueueDownloadItemsLater() {
-		var filter = CreateAttachmentFilter();
-		enqueueDownloadItemsTask.Post(cancellationToken => state.Db.Downloads.EnqueueDownloadItems(filter, cancellationToken));
-	}
-
-	private void OnItemsEnqueued(int itemCount) {
-		totalEnqueuedItemCount += itemCount;
-		totalItemsToDownloadCount = totalEnqueuedItemCount;
-		UpdateDownloadMessage();
-		RecomputeDownloadStatistics();
-	}
-
-	private AttachmentFilter CreateAttachmentFilter() {
-		var filter = FilterModel.CreateFilter();
-		filter.DownloadItemRule = AttachmentFilter.DownloadItemRules.OnlyNotPresent;
-		return filter;
-	}
-
-	public async Task OnClickToggleDownload() {
-		IsToggleDownloadButtonEnabled = false;
-
-		if (IsDownloading) {
-			await state.Downloader.Stop();
-
-			finishedItemsSubscription?.Dispose();
-			finishedItemsSubscription = null;
-
-			RecomputeDownloadStatistics();
-
-			await state.Db.Downloads.RemoveDownloadItems(EnqueuedItemFilter, FilterRemovalMode.RemoveMatching);
-
-			doneItemsCount = 0;
-			totalEnqueuedItemCount = 0;
-			totalItemsToDownloadCount = null;
-			UpdateDownloadMessage();
-		}
-		else {
-			var finishedItems = await state.Downloader.Start();
-
-			finishedItemsSubscription = finishedItems.Select(static _ => true)
-			                                         .Buffer(TimeSpan.FromMilliseconds(100))
-			                                         .Select(static items => items.Count)
-			                                         .Where(static items => items > 0)
-			                                         .ObserveOn(AvaloniaScheduler.Instance)
-			                                         .Subscribe(OnItemsFinished);
-
-			await EnqueueDownloadItems();
-		}
-
-		OnPropertyChanged(nameof(ToggleDownloadButtonText));
-		OnPropertyChanged(nameof(IsDownloading));
-		IsToggleDownloadButtonEnabled = true;
-	}
-
-	private void OnItemsFinished(int finishedItemCount) {
-		doneItemsCount += finishedItemCount;
-		UpdateDownloadMessage();
-		RecomputeDownloadStatistics();
-	}
-
-	public async Task OnClickRetryFailedDownloads() {
-		IsRetryingFailedDownloads = true;
-
-		try {
-			var allExceptFailedFilter = new DownloadItemFilter {
-				IncludeStatuses = new HashSet<DownloadStatus> {
-					DownloadStatus.Enqueued,
-					DownloadStatus.Downloading,
-					DownloadStatus.Success
-				}
-			};
-
-			await state.Db.Downloads.RemoveDownloadItems(allExceptFailedFilter, FilterRemovalMode.KeepMatching);
-
-			if (IsDownloading) {
-				await EnqueueDownloadItems();
-			}
-		} catch (Exception e) {
-			Log.Error(e);
-		} finally {
-			IsRetryingFailedDownloads = false;
-		}
-	}
-
-	private void RecomputeDownloadStatistics() {
-		downloadStatisticsTask.Post(state.Db.Downloads.GetStatistics);
-	}
-
-	private void UpdateStatistics(DownloadStatusStatistics statusStatistics) {
-		var hadFailedDownloads = HasFailedDownloads;
-
-		statisticsEnqueued.Items = statusStatistics.EnqueuedCount;
-		statisticsEnqueued.Size = statusStatistics.EnqueuedSize;
-
-		statisticsDownloaded.Items = statusStatistics.SuccessfulCount;
-		statisticsDownloaded.Size = statusStatistics.SuccessfulSize;
-
-		statisticsFailed.Items = statusStatistics.FailedCount;
-		statisticsFailed.Size = statusStatistics.FailedSize;
-
-		statisticsSkipped.Items = statusStatistics.SkippedCount;
-		statisticsSkipped.Size = statusStatistics.SkippedSize;
-
-		OnPropertyChanged(nameof(StatisticsRows));
-
-		if (hadFailedDownloads != HasFailedDownloads) {
-			OnPropertyChanged(nameof(HasFailedDownloads));
-			OnPropertyChanged(nameof(IsRetryFailedOnDownloadsButtonEnabled));
-		}
-
-		UpdateDownloadMessage();
-	}
-
-	private void UpdateDownloadMessage() {
-		DownloadMessage = IsDownloading ? doneItemsCount.Format() + " / " + (totalItemsToDownloadCount?.Format() ?? "?") : "";
-
-		OnPropertyChanged(nameof(DownloadMessage));
-		OnPropertyChanged(nameof(DownloadProgress));
-	}
-
-	public sealed class StatisticsRow {
-		public string State { get; }
-		public int Items { get; set; }
-		public ulong? Size { get; set; }
-
-		public StatisticsRow(string state) {
-			State = state;
-		}
-	}
-}

app/Desktop/Main/Pages/DatabasePageModel.cs

@@ -18,13 +18,12 @@ using DHT.Server;
 using DHT.Server.Data;
 using DHT.Server.Database;
 using DHT.Server.Database.Import;
-using DHT.Server.Database.Sqlite.Utils;
+using DHT.Server.Database.Sqlite.Schema;
 using DHT.Utils.Logging;
-using DHT.Utils.Models;
 
 namespace DHT.Desktop.Main.Pages;
 
-sealed class DatabasePageModel : BaseModel {
+sealed class DatabasePageModel {
 	private static readonly Log Log = Log.ForType<DatabasePageModel>();
 
 	public IDatabaseFile Db { get; }
@@ -81,7 +80,7 @@ sealed class DatabasePageModel : BaseModel {
 
 	private static async Task MergeWithDatabaseFromPaths(IDatabaseFile target, string[] paths, ProgressDialog dialog, IProgressCallback callback) {
 		var schemaUpgradeCallbacks = new SchemaUpgradeCallbacks(dialog, paths.Length);
-		
+
 		await PerformImport(target, paths, dialog, callback, "Database Merge", "Database Error", "database file", async path => {
 			IDatabaseFile? db = await DatabaseGui.TryOpenOrCreateDatabaseFromPath(path, dialog, schemaUpgradeCallbacks);
 
@@ -93,7 +92,7 @@ sealed class DatabasePageModel : BaseModel {
 				await target.AddFrom(db);
 				return true;
 			} finally {
-				db.Dispose();
+				await db.DisposeAsync();
 			}
 		});
 	}
@@ -102,7 +101,7 @@ sealed class DatabasePageModel : BaseModel {
 		private readonly ProgressDialog dialog;
 		private readonly int total;
 		private bool? decision;
-		
+
 		public SchemaUpgradeCallbacks(ProgressDialog dialog, int total) {
 			this.total = total;
 			this.dialog = dialog;
@@ -150,7 +149,7 @@ sealed class DatabasePageModel : BaseModel {
 
 		await PerformImport(target, paths, dialog, callback, "Legacy Archive Import", "Legacy Archive Error", "archive file", 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());
@@ -165,7 +164,7 @@ sealed class DatabasePageModel : BaseModel {
 		static bool IsValidSnowflake(string value) {
 			return string.IsNullOrEmpty(value) || ulong.TryParse(value, out _);
 		}
-			
+
 		var items = new List<TextBoxItem<DHT.Server.Data.Server>>();
 
 		foreach (var server in servers.OrderBy(static server => server.Type).ThenBy(static server => server.Name)) {
@@ -194,7 +193,7 @@ sealed class DatabasePageModel : BaseModel {
 
 	private static async Task PerformImport(IDatabaseFile target, string[] paths, ProgressDialog dialog, IProgressCallback callback, string neutralDialogTitle, string errorDialogTitle, string itemName, Func<string, Task<bool>> performImport) {
 		int total = paths.Length;
-		var oldStatistics = await target.SnapshotStatistics();
+		var oldStatistics = await DatabaseStatistics.Take(target);
 
 		int successful = 0;
 		int finished = 0;
@@ -225,15 +224,26 @@ sealed class DatabasePageModel : BaseModel {
 			return;
 		}
 
-		var newStatistics = await target.SnapshotStatistics();
+		var newStatistics = await DatabaseStatistics.Take(target);
 		await Dialog.ShowOk(dialog, neutralDialogTitle, GetImportDialogMessage(oldStatistics, newStatistics, successful, total, itemName));
 	}
 
-	private static string GetImportDialogMessage(DatabaseStatisticsSnapshot oldStatistics, DatabaseStatisticsSnapshot newStatistics, int successfulItems, int totalItems, string itemName) {
-		long newServers = newStatistics.TotalServers - oldStatistics.TotalServers;
-		long newChannels = newStatistics.TotalChannels - oldStatistics.TotalChannels;
-		long newUsers = newStatistics.TotalUsers - oldStatistics.TotalUsers;
-		long newMessages = newStatistics.TotalMessages - oldStatistics.TotalMessages;
+	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 static string GetImportDialogMessage(DatabaseStatistics oldStatistics, DatabaseStatistics newStatistics, int successfulItems, int totalItems, string itemName) {
+		long newServers = newStatistics.ServerCount - oldStatistics.ServerCount;
+		long newChannels = newStatistics.ChannelCount - oldStatistics.ChannelCount;
+		long newUsers = newStatistics.UserCount - oldStatistics.UserCount;
+		long newMessages = newStatistics.MessageCount - oldStatistics.MessageCount;
 
 		StringBuilder message = new StringBuilder();
 		message.Append("Processed ");

app/Desktop/Main/Pages/DebugPageModel.cs

@@ -9,168 +9,166 @@ using DHT.Desktop.Dialogs.Progress;
 using DHT.Server;
 using DHT.Server.Data;
 using DHT.Server.Service;
-using DHT.Utils.Models;
 
-namespace DHT.Desktop.Main.Pages {
-	sealed class DebugPageModel : BaseModel {
-		public string GenerateChannels { get; set; } = "0";
-		public string GenerateUsers { get; set; } = "0";
-		public string GenerateMessages { get; set; } = "0";
+namespace DHT.Desktop.Main.Pages;
 
-		private readonly Window window;
-		private readonly State state;
+sealed class DebugPageModel {
+	public string GenerateChannels { get; set; } = "0";
+	public string GenerateUsers { get; set; } = "0";
+	public string GenerateMessages { get; set; } = "0";
 
-		[Obsolete("Designer")]
-		public DebugPageModel() : this(null!, State.Dummy) {}
+	private readonly Window window;
+	private readonly State state;
 
-		public DebugPageModel(Window window, State state) {
-			this.window = window;
-			this.state = state;
+	[Obsolete("Designer")]
+	public DebugPageModel() : this(null!, State.Dummy) {}
+
+	public DebugPageModel(Window window, State state) {
+		this.window = window;
+		this.state = state;
+	}
+
+	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;
 		}
 
-		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));
+		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;
 		}
 
-		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, 0, batchCount);
-
-			var rand = new Random();
-			var server = new DHT.Server.Data.Server {
-				Id = RandomId(rand),
-				Name = RandomName("s"),
-				Type = ServerType.Server,
-			};
-
-			var channels = Enumerable.Range(0, channelCount).Select(i => new Channel {
-				Id = RandomId(rand),
-				Server = server.Id,
-				Name = RandomName("c"),
-				ParentId = null,
-				Position = i,
-				Topic = RandomText(rand, 10),
-				Nsfw = rand.Next(4) == 0,
-			}).ToArray();
-
-			var users = Enumerable.Range(0, userCount).Select(_ => new User {
-				Id = RandomId(rand),
-				Name = RandomName("u"),
-				AvatarUrl = null,
-				Discriminator = rand.Next(0, 9999).ToString(),
-			}).ToArray();
-
-			await state.Db.Users.Add(users);
-			await state.Db.Servers.Add([server]);
-			await state.Db.Channels.Add(channels);
-
-			var now = DateTimeOffset.Now;
-			int batchIndex = 0;
-
-			while (messageCount > 0) {
-				int hourOffset = batchIndex;
-
-				var messages = Enumerable.Range(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(1, 60)) : null;
-
-					var timeMillis = time.ToUnixTimeMilliseconds();
-					var editMillis = edit?.ToUnixTimeMilliseconds();
-
-					return new Message {
-						Id = (ulong) timeMillis,
-						Sender = RandomBiasedIndex(rand, users).Id,
-						Channel = RandomBiasedIndex(rand, channels).Id,
-						Text = RandomText(rand, 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);
-			}
+		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;
 		}
 
-		private static ulong RandomId(Random rand) {
-			ulong h = unchecked((ulong) rand.Next());
-			ulong l = unchecked((ulong) rand.Next());
-			return (h << 32) | l;
-		}
+		await ProgressDialog.Show(window, "Generating Random Data", async (_, callback) => await GenerateRandomData(channels, users, messages, callback));
+	}
 
-		private static string RandomName(string prefix) {
-			return prefix + "-" + ServerUtils.GenerateRandomToken(5);
-		}
+	private const int BatchSize = 500;
 
-		private static T RandomBiasedIndex<T>(Random rand, T[] options) {
-			return options[(int) Math.Floor(options.Length * rand.NextDouble() * rand.NextDouble())];
-		}
+	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, 0, batchCount);
 
-		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",
+		var rand = new Random();
+		var server = new DHT.Server.Data.Server {
+			Id = RandomId(rand),
+			Name = RandomName("s"),
+			Type = ServerType.Server,
 		};
 
-		private static string RandomText(Random rand, int maxWords) {
-			int wordCount = 1 + (int) Math.Floor(maxWords * Math.Pow(rand.NextDouble(), 3));
-			return string.Join(' ', Enumerable.Range(0, wordCount).Select(_ => RandomWords[rand.Next(RandomWords.Length)]));
+		var channels = Enumerable.Range(0, channelCount).Select(i => new Channel {
+			Id = RandomId(rand),
+			Server = server.Id,
+			Name = RandomName("c"),
+			ParentId = null,
+			Position = i,
+			Topic = RandomText(rand, 10),
+			Nsfw = rand.Next(4) == 0,
+		}).ToArray();
+
+		var users = Enumerable.Range(0, userCount).Select(_ => new User {
+			Id = RandomId(rand),
+			Name = RandomName("u"),
+			DisplayName = RandomName("u"),
+			AvatarUrl = null,
+			Discriminator = rand.Next(0, 9999).ToString(),
+		}).ToArray();
+
+		await state.Db.Users.Add(users);
+		await state.Db.Servers.Add([server]);
+		await state.Db.Channels.Add(channels);
+
+		var now = DateTimeOffset.Now;
+		int batchIndex = 0;
+
+		while (messageCount > 0) {
+			int hourOffset = batchIndex;
+
+			var messages = Enumerable.Range(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(1, 60)) : null;
+
+				var timeMillis = time.ToUnixTimeMilliseconds();
+				var editMillis = edit?.ToUnixTimeMilliseconds();
+
+				return new Message {
+					Id = (ulong) timeMillis,
+					Sender = RandomBiasedIndex(rand, users).Id,
+					Channel = RandomBiasedIndex(rand, channels).Id,
+					Text = RandomText(rand, 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(), 3));
+		return string.Join(' ', Enumerable.Range(0, wordCount).Select(_ => RandomWords[rand.Next(RandomWords.Length)]));
+	}
 }
 #else
-using DHT.Utils.Models;
+namespace DHT.Desktop.Main.Pages;
 
-namespace DHT.Desktop.Main.Pages {
-	sealed class DebugPageModel : BaseModel {
-		public string GenerateChannels { get; set; } = "0";
-		public string GenerateUsers { get; set; } = "0";
-		public string GenerateMessages { get; set; } = "0";
+sealed class DebugPageModel {
+	public string GenerateChannels { get; set; } = "0";
+	public string GenerateUsers { get; set; } = "0";
+	public string GenerateMessages { get; set; } = "0";
 
-		public void OnClickAddRandomDataToDatabase() {}
-	}
+	public void OnClickAddRandomDataToDatabase() {}
 }
 #endif

app/Desktop/Main/Pages/DownloadsPage.axaml

@@ -5,11 +5,11 @@
              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.AttachmentsPage"
-             x:DataType="pages:AttachmentsPageModel">
+             x:Class="DHT.Desktop.Main.Pages.DownloadsPage"
+             x:DataType="pages:DownloadsPageModel">
 
     <Design.DataContext>
-        <pages:AttachmentsPageModel />
+        <pages:DownloadsPageModel />
     </Design.DataContext>
 
     <UserControl.Styles>
@@ -31,25 +31,24 @@
     </UserControl.Styles>
 
     <StackPanel Orientation="Vertical" Spacing="20">
-        <DockPanel>
-            <Button Command="{Binding OnClickToggleDownload}" Content="{Binding ToggleDownloadButtonText}" IsEnabled="{Binding IsToggleDownloadButtonEnabled}" DockPanel.Dock="Left" />
-            <TextBlock Text="{Binding DownloadMessage}" MinWidth="100" Margin="10 0 0 0" VerticalAlignment="Center" TextAlignment="Right" DockPanel.Dock="Left" />
-            <ProgressBar Value="{Binding DownloadProgress}" IsVisible="{Binding IsDownloading}" Margin="15 0" VerticalAlignment="Center" DockPanel.Dock="Right" />
-        </DockPanel>
-        <controls:AttachmentFilterPanel DataContext="{Binding FilterModel}" IsEnabled="{Binding !IsDownloading, RelativeSource={RelativeSource AncestorType=pages:AttachmentsPageModel}}" />
+        <StackPanel Orientation="Horizontal" Spacing="10">
+            <Button Command="{Binding OnClickToggleDownload}" Content="{Binding ToggleDownloadButtonText}" IsEnabled="{Binding IsToggleDownloadButtonEnabled}" />
+            <Button Command="{Binding OnClickRetryFailedDownloads}" IsEnabled="{Binding IsRetryFailedOnDownloadsButtonEnabled}">Retry Failed Downloads</Button>
+        </StackPanel>
+        <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>
         <StackPanel Orientation="Vertical" Spacing="12">
             <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}" Width="*" />
-                        <DataGridTextColumn Header="Attachments" Binding="{Binding Items, Mode=OneWay, Converter={StaticResource NumberValueConverter}}" Width="*" CellStyleClasses="right" />
-                        <DataGridTextColumn Header="Size" Binding="{Binding Size, Mode=OneWay, Converter={StaticResource BytesValueConverter}}" Width="*" CellStyleClasses="right" />
+                        <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 Orientation="Horizontal" Spacing="10">
-                <Button Command="{Binding OnClickRetryFailedDownloads}" IsEnabled="{Binding IsRetryFailedOnDownloadsButtonEnabled}">Retry Failed Downloads</Button>
-            </StackPanel>
         </StackPanel>
     </StackPanel>
 </UserControl>

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

@@ -4,8 +4,8 @@ using Avalonia.Controls;
 namespace DHT.Desktop.Main.Pages;
 
 [SuppressMessage("ReSharper", "MemberCanBeInternal")]
-public sealed partial class AttachmentsPage : UserControl {
-	public AttachmentsPage() {
+public sealed partial class DownloadsPage : UserControl {
+	public DownloadsPage() {
 		InitializeComponent();
 	}
 }

app/Desktop/Main/Pages/DownloadsPageModel.cs

@@ -0,0 +1,210 @@
+using System;
+using System.Collections.ObjectModel;
+using System.Reactive.Linq;
+using System.Threading.Tasks;
+using Avalonia.ReactiveUI;
+using CommunityToolkit.Mvvm.ComponentModel;
+using DHT.Desktop.Common;
+using DHT.Desktop.Main.Controls;
+using DHT.Server;
+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;
+
+namespace DHT.Desktop.Main.Pages;
+
+sealed partial class DownloadsPageModel : ObservableObject, IAsyncDisposable {
+	private static readonly Log Log = Log.ForType<DownloadsPageModel>();
+
+	[ObservableProperty(Setter = Access.Private)]
+	private bool isToggleDownloadButtonEnabled = true;
+
+	public string ToggleDownloadButtonText => IsDownloading ? "Stop Downloading" : "Start Downloading";
+
+	[ObservableProperty(Setter = Access.Private)]
+	[NotifyPropertyChangedFor(nameof(IsRetryFailedOnDownloadsButtonEnabled))]
+	private bool isRetryingFailedDownloads = false;
+
+	[ObservableProperty(Setter = Access.Private)]
+	[NotifyPropertyChangedFor(nameof(IsRetryFailedOnDownloadsButtonEnabled))]
+	private bool hasFailedDownloads;
+
+	public bool IsRetryFailedOnDownloadsButtonEnabled => !IsRetryingFailedDownloads && HasFailedDownloads;
+
+	[ObservableProperty(Setter = Access.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 State state;
+	private readonly ThrottledTask<DownloadStatusStatistics> downloadStatisticsTask;
+	private readonly IDisposable downloadItemCountSubscription;
+	
+	private IDisposable? finishedItemsSubscription;
+	private DownloadItemFilter? currentDownloadFilter;
+
+	public DownloadsPageModel() : this(State.Dummy) {}
+
+	public DownloadsPageModel(State state) {
+		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, false)) {
+			await StartDownload();
+		}
+	}
+
+	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;
+
+		if (IsDownloading) {
+			await StopDownload();
+		}
+		else {
+			await StartDownload();
+		}
+
+		await state.Db.Settings.Set(SettingsKey.DownloadsAutoStart, IsDownloading);
+		IsToggleDownloadButtonEnabled = true;
+	}
+
+	private async Task StartDownload() {
+		await state.Db.Downloads.MoveDownloadingItemsBackToQueue();
+		
+		var finishedItems = await state.Downloader.Start(currentDownloadFilter = FilterModel.CreateFilter());
+		finishedItemsSubscription = finishedItems.ObserveOn(AvaloniaScheduler.Instance).Subscribe(OnItemFinished);
+		
+		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(nameof(ToggleDownloadButtonText));
+		OnPropertyChanged(nameof(IsDownloading));
+	}
+
+	private void OnItemFinished(DownloadItem item) {
+		RecomputeDownloadStatistics();
+	}
+
+	public async Task OnClickRetryFailedDownloads() {
+		IsRetryingFailedDownloads = true;
+
+		try {
+			await state.Db.Downloads.RetryFailed();
+			RecomputeDownloadStatistics();
+		} catch (Exception e) {
+			Log.Error(e);
+		} finally {
+			IsRetryingFailedDownloads = false;
+		}
+	}
+
+	private void RecomputeDownloadStatistics() {
+		downloadStatisticsTask.Post(cancellationToken => state.Db.Downloads.GetStatistics(currentDownloadFilter ?? new DownloadItemFilter(), cancellationToken));
+	}
+
+	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;
+
+		HasFailedDownloads = statusStatistics.FailedCount > 0;
+	}
+
+	[ObservableObject]
+	public sealed partial class StatisticsRow(string state) {
+		public string State { get; } = state;
+
+		[ObservableProperty]
+		private int items;
+
+		[ObservableProperty]
+		[NotifyPropertyChangedFor(nameof(SizeText))]
+		private ulong? size;
+		
+		[ObservableProperty]
+		[NotifyPropertyChangedFor(nameof(SizeText))]
+		private bool 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/TrackingPageModel.cs

@@ -3,33 +3,25 @@ using System.Threading;
 using System.Threading.Tasks;
 using System.Web;
 using Avalonia.Controls;
+using CommunityToolkit.Mvvm.ComponentModel;
 using DHT.Desktop.Dialogs.Message;
 using DHT.Desktop.Discord;
 using DHT.Desktop.Server;
-using DHT.Utils.Models;
 using static DHT.Desktop.Program;
 
 namespace DHT.Desktop.Main.Pages;
 
-sealed class TrackingPageModel : BaseModel {
+sealed partial class TrackingPageModel : ObservableObject {
+	[ObservableProperty(Setter = Access.Private)]
 	private bool isCopyTrackingScriptButtonEnabled = true;
 
-	public bool IsCopyTrackingScriptButtonEnabled {
-		get => isCopyTrackingScriptButtonEnabled;
-		set => Change(ref isCopyTrackingScriptButtonEnabled, value);
-	}
+	[ObservableProperty(Setter = Access.Private)]
+	[NotifyPropertyChangedFor(nameof(ToggleAppDevToolsButtonText))]
+	private bool? areDevToolsEnabled = null;
 
-	private bool? areDevToolsEnabled;
-
-	private bool? AreDevToolsEnabled {
-		get => areDevToolsEnabled;
-		set {
-			Change(ref areDevToolsEnabled, value);
-			OnPropertyChanged(nameof(ToggleAppDevToolsButtonText));
-		}
-	}
-
-	public bool IsToggleAppDevToolsButtonEnabled { get; private set; } = false;
+	[ObservableProperty(Setter = Access.Private)]
+	[NotifyPropertyChangedFor(nameof(ToggleAppDevToolsButtonText))]
+	private bool isToggleAppDevToolsButtonEnabled = false;
 
 	public string ToggleAppDevToolsButtonText {
 		get {
@@ -86,17 +78,15 @@ sealed class TrackingPageModel : BaseModel {
 	}
 
 	private async Task InitializeDevToolsToggle() {
-		bool? devToolsEnabled = await DiscordAppSettings.AreDevToolsEnabled();
+		bool? devToolsEnabled = await Task.Run(DiscordAppSettings.AreDevToolsEnabled);
 
 		if (devToolsEnabled.HasValue) {
-			IsToggleAppDevToolsButtonEnabled = true;
 			AreDevToolsEnabled = devToolsEnabled.Value;
+			IsToggleAppDevToolsButtonEnabled = true;
 		}
 		else {
 			IsToggleAppDevToolsButtonEnabled = false;
 		}
-
-		OnPropertyChanged(nameof(IsToggleAppDevToolsButtonEnabled));
 	}
 
 	public async Task OnClickToggleAppDevTools() {

app/Desktop/Main/Pages/ViewerPage.axaml

@@ -21,7 +21,6 @@
     <StackPanel Orientation="Vertical" Spacing="20">
         <StackPanel Orientation="Horizontal" VerticalAlignment="Top">
             <Button Command="{Binding OnClickOpenViewer}" Margin="0 0 5 0">Open Viewer</Button>
-            <Button Command="{Binding OnClickSaveViewer}" Margin="5 0 0 0">Save Viewer</Button>
         </StackPanel>
         <controls:MessageFilterPanel DataContext="{Binding FilterModel}" />
         <Expander Header="Database Tools">

app/Desktop/Main/Pages/ViewerPageModel.cs

@@ -1,45 +1,27 @@
 using System;
-using System.Collections.Concurrent;
 using System.ComponentModel;
-using System.Diagnostics;
-using System.IO;
-using System.Text;
 using System.Threading.Tasks;
 using System.Web;
 using Avalonia.Controls;
-using Avalonia.Platform.Storage;
+using CommunityToolkit.Mvvm.ComponentModel;
 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.Desktop.Server;
 using DHT.Server;
 using DHT.Server.Data.Filters;
-using DHT.Server.Database.Export;
-using DHT.Server.Database.Export.Strategy;
-using DHT.Utils.Models;
-using static DHT.Desktop.Program;
+using DHT.Server.Service.Viewer;
 
 namespace DHT.Desktop.Main.Pages;
 
-sealed class ViewerPageModel : BaseModel, IDisposable {
-	public static readonly ConcurrentBag<string> TemporaryFiles = [];
-
-	private static readonly FilePickerFileType[] ViewerFileTypes = [
-		FileDialogs.CreateFilter("Discord History Viewer", ["html"])
-	];
-
+sealed partial class ViewerPageModel : ObservableObject, IDisposable {
 	public bool DatabaseToolFilterModeKeep { get; set; } = true;
 	public bool DatabaseToolFilterModeRemove { get; set; } = false;
 
+	[ObservableProperty]
 	private bool hasFilters = false;
 
-	public bool HasFilters {
-		get => hasFilters;
-		set => Change(ref hasFilters, value);
-	}
-
 	public MessageFilterPanelModel FilterModel { get; }
 
 	private readonly Window window;
@@ -66,93 +48,15 @@ sealed class ViewerPageModel : BaseModel, IDisposable {
 
 	public async void OnClickOpenViewer() {
 		try {
-			var fullPath = await PrepareTemporaryViewerFile();
-			var strategy = new LiveViewerExportStrategy(ServerConfiguration.Port, ServerConfiguration.Token);
-
-			await WriteViewerFile(fullPath, strategy);
-			Process.Start(new ProcessStartInfo(fullPath) { UseShellExecute = true });
+			string serverUrl = "http://127.0.0.1:" + ServerConfiguration.Port;
+			string serverToken = ServerConfiguration.Token;
+			string sessionId = state.ViewerSessions.Register(new ViewerSession(FilterModel.CreateFilter())).ToString();
+			SystemUtils.OpenUrl(serverUrl + "/viewer/?token=" + HttpUtility.UrlEncode(serverToken) + "&session=" + HttpUtility.UrlEncode(sessionId));
 		} catch (Exception e) {
-			await Dialog.ShowOk(window, "Open Viewer", "Could not save viewer: " + e.Message);
+			await Dialog.ShowOk(window, "Open Viewer", "Could not open viewer: " + e.Message);
 		}
 	}
 
-	private async Task<string> PrepareTemporaryViewerFile() {
-		return await Task.Run(() => {
-			string rootPath = Path.Combine(Path.GetTempPath(), "DiscordHistoryTracker");
-			string filenameBase = Path.GetFileNameWithoutExtension(state.Db.Path) + "-" + DateTime.Now.ToString("yyyy-MM-dd");
-			string fullPath = Path.Combine(rootPath, filenameBase + ".html");
-			
-			int counter = 0;
-
-			while (File.Exists(fullPath)) {
-				++counter;
-				fullPath = Path.Combine(rootPath, filenameBase + "-" + counter + ".html");
-			}
-
-			TemporaryFiles.Add(fullPath);
-
-			Directory.CreateDirectory(rootPath);
-
-			return fullPath;
-		});
-	}
-
-	public async void OnClickSaveViewer() {
-		string? path = await window.StorageProvider.SaveFile(new FilePickerSaveOptions {
-			Title = "Save Viewer",
-			FileTypeChoices = ViewerFileTypes,
-			SuggestedFileName = Path.GetFileNameWithoutExtension(state.Db.Path) + ".html",
-			SuggestedStartLocation = await FileDialogs.GetSuggestedStartLocation(window, Path.GetDirectoryName(state.Db.Path)),
-		});
-
-		if (path == null) {
-			return;
-		}
-
-		try {
-			await WriteViewerFile(path, StandaloneViewerExportStrategy.Instance);
-		} catch (Exception e) {
-			await Dialog.ShowOk(window, "Save Viewer", "Could not save viewer: " + e.Message);
-		}
-	}
-
-	private async Task WriteViewerFile(string path, IViewerExportStrategy strategy) {
-		const string ArchiveTag = "/*[ARCHIVE]*/";
-
-		string indexFile = await Resources.ReadTextAsync("Viewer/index.html");
-		string viewerTemplate = indexFile.Replace("/*[JS]*/", await Resources.ReadJoinedAsync("Viewer/scripts/", '\n'))
-		                                 .Replace("/*[CSS]*/", await Resources.ReadJoinedAsync("Viewer/styles/", '\n'));
-
-		int viewerArchiveTagStart = viewerTemplate.IndexOf(ArchiveTag);
-		int viewerArchiveTagEnd = viewerArchiveTagStart + ArchiveTag.Length;
-
-		string jsonTempFile = path + ".tmp";
-
-		await using (var jsonStream = new FileStream(jsonTempFile, FileMode.Create, FileAccess.ReadWrite, FileShare.Read)) {
-			await ViewerJsonExport.Generate(jsonStream, strategy, state.Db, FilterModel.CreateFilter());
-
-			char[] jsonBuffer = new char[Math.Min(32768, jsonStream.Position)];
-			jsonStream.Position = 0;
-
-			await using (var outputStream = new FileStream(path, FileMode.Create, FileAccess.Write, FileShare.Read))
-			await using (var outputWriter = new StreamWriter(outputStream, Encoding.UTF8)) {
-				await outputWriter.WriteAsync(viewerTemplate[..viewerArchiveTagStart]);
-
-				using (var jsonReader = new StreamReader(jsonStream, Encoding.UTF8)) {
-					int readBytes;
-					while ((readBytes = await jsonReader.ReadAsync(jsonBuffer, 0, jsonBuffer.Length)) > 0) {
-						string jsonChunk = new string(jsonBuffer, 0, readBytes);
-						await outputWriter.WriteAsync(HttpUtility.JavaScriptStringEncode(jsonChunk));
-					}
-				}
-
-				await outputWriter.WriteAsync(viewerTemplate[viewerArchiveTagEnd..]);
-			}
-		}
-
-		File.Delete(jsonTempFile);
-	}
-
 	public async Task OnClickApplyFiltersToDatabase() {
 		var filter = FilterModel.CreateFilter();
 		var messageCount = await ProgressDialog.ShowIndeterminate(window, "Apply Filters", "Counting matching messages...", _ => state.Db.Messages.Count(filter));

app/Desktop/Main/Screens/MainContentScreen.axaml

@@ -74,7 +74,7 @@
     <DockPanel>
         <Border Classes="statusBar" DockPanel.Dock="Bottom">
             <DockPanel>
-                <TextBlock Classes="invisibleTabItem" DockPanel.Dock="Left">Attachments</TextBlock>
+                <TextBlock Classes="invisibleTabItem" DockPanel.Dock="Left">Downloads</TextBlock>
                 <controls:StatusBar DataContext="{Binding StatusBarModel}" DockPanel.Dock="Right" />
             </DockPanel>
         </Border>
@@ -94,9 +94,9 @@
                     <ContentPresenter Content="{Binding TrackingPage}" Classes="page" />
                 </ScrollViewer>
             </TabItem>
-            <TabItem x:Name="TabAttachments" Header="Attachments" Grid.Row="2">
+            <TabItem x:Name="TabDownloads" Header="Downloads" Grid.Row="2">
                 <ScrollViewer>
-                    <ContentPresenter Content="{Binding AttachmentsPage}" Classes="page" />
+                    <ContentPresenter Content="{Binding DownloadsPage}" Classes="page" />
                 </ScrollViewer>
             </TabItem>
             <TabItem x:Name="TabViewer" Header="Viewer" Grid.Row="3">

app/Desktop/Main/Screens/MainContentScreenModel.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Threading.Tasks;
 using Avalonia.Controls;
 using DHT.Desktop.Main.Controls;
 using DHT.Desktop.Main.Pages;
@@ -6,15 +7,15 @@ using DHT.Server;
 
 namespace DHT.Desktop.Main.Screens;
 
-sealed class MainContentScreenModel : IDisposable {
+sealed class MainContentScreenModel : IAsyncDisposable {
 	public DatabasePage DatabasePage { get; }
 	private DatabasePageModel DatabasePageModel { get; }
 
 	public TrackingPage TrackingPage { get; }
 	private TrackingPageModel TrackingPageModel { get; }
 
-	public AttachmentsPage AttachmentsPage { get; }
-	private AttachmentsPageModel AttachmentsPageModel { get; }
+	public DownloadsPage DownloadsPage { get; }
+	private DownloadsPageModel DownloadsPageModel { get; }
 
 	public ViewerPage ViewerPage { get; }
 	private ViewerPageModel ViewerPageModel { get; }
@@ -52,8 +53,8 @@ sealed class MainContentScreenModel : IDisposable {
 		TrackingPageModel = new TrackingPageModel(window);
 		TrackingPage = new TrackingPage { DataContext = TrackingPageModel };
 
-		AttachmentsPageModel = new AttachmentsPageModel(state);
-		AttachmentsPage = new AttachmentsPage { DataContext = AttachmentsPageModel };
+		DownloadsPageModel = new DownloadsPageModel(state);
+		DownloadsPage = new DownloadsPage { DataContext = DownloadsPageModel };
 
 		ViewerPageModel = new ViewerPageModel(window, state);
 		ViewerPage = new ViewerPage { DataContext = ViewerPageModel };
@@ -70,9 +71,13 @@ sealed class MainContentScreenModel : IDisposable {
 
 		StatusBarModel = new StatusBarModel(state);
 	}
+	
+	public async Task Initialize() {
+		await DownloadsPageModel.Initialize();
+	}
 
-	public void Dispose() {
-		AttachmentsPageModel.Dispose();
+	public async ValueTask DisposeAsync() {
+		await DownloadsPageModel.DisposeAsync();
 		ViewerPageModel.Dispose();
 		AdvancedPageModel.Dispose();
 		StatusBarModel.Dispose();

app/Desktop/Main/Screens/WelcomeScreen.axaml

@@ -22,20 +22,21 @@
             <Setter Property="HorizontalAlignment" Value="Center" />
             <Setter Property="VerticalAlignment" Value="Center" />
         </Style>
-        <Style Selector="Button">
-            <Setter Property="Margin" Value="5 0" />
+        <Style Selector="Grid#ButtonPanel > Button">
+            <Setter Property="HorizontalAlignment" Value="Stretch" />
         </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}" IsEnabled="{Binding IsOpenOrCreateDatabaseButtonEnabled}">Open or Create Database</Button>
-                <Button Command="{Binding ShowAboutDialog}">About</Button>
-                <Button Command="{Binding Exit}">Exit</Button>
-            </StackPanel>
+        <StackPanel Margin="42 30">
+            <TextBlock Text="{Binding Version, StringFormat=Discord History Tracker v{0}}" FontSize="25" Margin="0 0 0 25" HorizontalAlignment="Center" />
+            
+            <Grid Name="ButtonPanel" RowDefinitions="Auto,12,Auto,12,Auto" ColumnDefinitions="*,12,*" Margin="12 0" HorizontalAlignment="Stretch">
+                <Button Grid.Row="0" Grid.Column="0" Grid.ColumnSpan="3" Command="{Binding OpenOrCreateDatabase}" IsEnabled="{Binding IsOpenOrCreateDatabaseButtonEnabled}">Open or Create Database</Button>
+                <Button Grid.Row="2" Grid.Column="0" Grid.ColumnSpan="3" Command="{Binding CheckUpdates}">Check For Updates</Button>
+                <Button Grid.Row="4" Grid.Column="0" Command="{Binding ShowAboutDialog}">About</Button>
+                <Button Grid.Row="4" Grid.Column="2" Command="{Binding Exit}">Exit</Button>
+            </Grid>
         </StackPanel>
     </Panel>
 </UserControl>

app/Desktop/Main/Screens/WelcomeScreenModel.cs

@@ -1,29 +1,31 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Net;
+using System.Net.Http;
 using System.Threading.Tasks;
 using Avalonia.Controls;
+using CommunityToolkit.Mvvm.ComponentModel;
 using DHT.Desktop.Common;
 using DHT.Desktop.Dialogs.Message;
 using DHT.Desktop.Dialogs.Progress;
+using DHT.Server.Data.Settings;
 using DHT.Server.Database;
-using DHT.Server.Database.Sqlite.Utils;
-using DHT.Utils.Models;
+using DHT.Server.Database.Sqlite.Schema;
+using DHT.Utils.Logging;
 
 namespace DHT.Desktop.Main.Screens;
 
-sealed class WelcomeScreenModel : BaseModel {
+sealed partial class WelcomeScreenModel : ObservableObject {
+	private static readonly Log Log = Log.ForType<WelcomeScreenModel>();
+
 	public string Version => Program.Version;
-	
+
+	[ObservableProperty(Setter = Access.Private)]
 	private bool isOpenOrCreateDatabaseButtonEnabled = true;
-	
-	public bool IsOpenOrCreateDatabaseButtonEnabled {
-		get => isOpenOrCreateDatabaseButtonEnabled;
-		set => Change(ref isOpenOrCreateDatabaseButtonEnabled, value);
-	}
-	
-	public event EventHandler<IDatabaseFile>? DatabaseSelected; 
-	
+
+	public event EventHandler<IDatabaseFile>? DatabaseSelected;
+
 	private readonly Window window;
 
 	private string? dbFilePath;
@@ -49,20 +51,22 @@ sealed class WelcomeScreenModel : BaseModel {
 
 	public async Task OpenOrCreateDatabaseFromPath(string path) {
 		dbFilePath = path;
-		
+
+		bool isNew = !File.Exists(path);
+
 		var db = await DatabaseGui.TryOpenOrCreateDatabaseFromPath(path, window, new SchemaUpgradeCallbacks(window));
-		if (db != null) {
-			DatabaseSelected?.Invoke(this, db);
+		if (db == null) {
+			return;
 		}
+
+		if (isNew && await Dialog.ShowYesNo(window, "Automatic Downloads", "Do you want to automatically download files hosted on Discord? You can change this later in the Downloads tab.") == DialogResult.YesNo.Yes) {
+			await db.Settings.Set(SettingsKey.DownloadsAutoStart, true);
+		}
+
+		DatabaseSelected?.Invoke(this, db);
 	}
 
-	private sealed class SchemaUpgradeCallbacks : ISchemaUpgradeCallbacks {
-		private readonly Window window;
-		
-		public SchemaUpgradeCallbacks(Window window) {
-			this.window = window;
-		}
-
+	private sealed class SchemaUpgradeCallbacks(Window window) : ISchemaUpgradeCallbacks {
 		public async Task<bool> CanUpgrade() {
 			return DialogResult.YesNo.Yes == await DatabaseGui.ShowCanUpgradeDatabaseDialog(window);
 		}
@@ -75,20 +79,12 @@ sealed class WelcomeScreenModel : BaseModel {
 				await doUpgrade(reporter);
 				await Task.Delay(TimeSpan.FromMilliseconds(600));
 			}
-			
+
 			await new ProgressDialog { DataContext = new ProgressDialogModel("Upgrading Database", StartUpgrade, progressItems: 3) }.ShowProgressDialog(window);
 		}
 
-		private sealed class ProgressReporter : ISchemaUpgradeCallbacks.IProgressReporter {
-			private readonly IReadOnlyList<IProgressCallback> callbacks;
-			
-			private readonly int versionSteps;
+		private sealed class ProgressReporter(int versionSteps, IReadOnlyList<IProgressCallback> callbacks) : ISchemaUpgradeCallbacks.IProgressReporter {
 			private int versionProgress = 0;
-			
-			public ProgressReporter(int versionSteps, IReadOnlyList<IProgressCallback> callbacks) {
-				this.callbacks = callbacks;
-				this.versionSteps = versionSteps;
-			}
 
 			public async Task NextVersion() {
 				await callbacks[0].Update("Upgrading schema version...", versionProgress++, versionSteps);
@@ -113,6 +109,53 @@ sealed class WelcomeScreenModel : BaseModel {
 		}
 	}
 
+	public async Task CheckUpdates() {
+		Version? latestVersion = await ProgressDialog.ShowIndeterminate<Version?>(window, "Check Updates", "Checking for updates...", async _ => {
+			var client = new HttpClient(new SocketsHttpHandler {
+				AutomaticDecompression = DecompressionMethods.None,
+				AllowAutoRedirect = false,
+				UseCookies = false
+			});
+
+			client.Timeout = TimeSpan.FromSeconds(30);
+			client.MaxResponseContentBufferSize = 1024;
+			client.DefaultRequestHeaders.UserAgent.ParseAdd("DiscordHistoryTracker/" + Program.Version);
+
+			string response;
+			try {
+				response = await client.GetStringAsync(Program.Website + "/version");
+			} catch (TaskCanceledException e) when (e.InnerException is TimeoutException) {
+				await Dialog.ShowOk(window, "Check Updates", "Request timed out.");
+				return null;
+			} catch (Exception e) {
+				Log.Error(e);
+				await Dialog.ShowOk(window, "Check Updates", "Error checking for updates: " + e.Message);
+				return null;
+			}
+
+			if (!System.Version.TryParse(response, out var latestVersion)) {
+				await Dialog.ShowOk(window, "Check Updates", "Server returned an invalid response.");
+				return null;
+			}
+
+			return latestVersion;
+		});
+
+		if (latestVersion == null) {
+			return;
+		}
+		
+		if (Program.AssemblyVersion >= latestVersion) {
+			await Dialog.ShowOk(window, "Check Updates", "You are using the latest version.");
+			return;
+		}
+		
+		if (await Dialog.ShowYesNo(window, "Check Updates", "A newer version is available: v" + Program.VersionToString(latestVersion) + "\nVisit the official website and close the app?") == DialogResult.YesNo.Yes) {
+			SystemUtils.OpenUrl(Program.Website);
+			Exit();
+		}
+	}
+
 	public async Task ShowAboutDialog() {
 		await new AboutWindow { DataContext = new AboutWindowModel() }.ShowDialog(window);
 	}

app/Desktop/Program.cs

@@ -9,17 +9,18 @@ namespace DHT.Desktop;
 
 static class Program {
 	public static string Version { get; }
+	public static Version AssemblyVersion { get; }
 	public static CultureInfo Culture { get; }
 	public static ResourceLoader Resources { get; }
 	public static Arguments Arguments { get; }
 
+	public const string Website = "https://dht.chylex.com";
+	
 	static Program() {
 		var assembly = Assembly.GetExecutingAssembly();
 
-		Version = assembly.GetName().Version?.ToString() ?? "";
-		while (Version.EndsWith(".0")) {
-			Version = Version[..^2];
-		}
+		AssemblyVersion = assembly.GetName().Version ?? new Version(0, 0, 0, 0);
+		Version = VersionToString(AssemblyVersion);
 
 		Culture = CultureInfo.CurrentCulture;
 		CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;
@@ -30,6 +31,16 @@ static class Program {
 		Resources = new ResourceLoader(assembly);
 		Arguments = new Arguments(Environment.GetCommandLineArgs());
 	}
+	
+	public static string VersionToString(Version version) {
+		string versionStr = version.ToString();
+		
+		while (versionStr.EndsWith(".0")) {
+			versionStr = versionStr[..^2];
+		}
+		
+		return versionStr;
+	}
 
 	public static void Main(string[] args) {
 		if (Arguments.Console && OperatingSystem.IsWindows()) {

app/NuGet.Config

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="utf-8"?>
+<configuration>
+  <packageSources>
+    <add key="chylex's repository" value="https://nuget.chylex.com/feed/index.json" />
+  </packageSources>
+</configuration>

app/Resources/Schemas/track-users.yml

@@ -9,6 +9,8 @@ items:
           pattern: "^[0-9]+$"
         name:
           type: string
+        displayName:
+          type: string
         avatar:
           type: string
         discriminator:

app/Resources/Tracker/bootstrap.js

@@ -10,11 +10,16 @@
 		return;
 	}
 	
+	/*[IMPORTS]*/
+	
+	if (!DISCORD.isCompatible()) {
+		alert("Discord History Tracker is not compatible with this version of Discord.");
+		return;
+	}
+	
 	window.DHT_LOADED = true;
 	window.DHT_ON_UNLOAD = [];
 	
-	/*[IMPORTS]*/
-	
 	const port = 0; /*[PORT]*/
 	const token = "/*[TOKEN]*/";
 	STATE.setup(port, token);
@@ -46,7 +51,7 @@
 		return action === null || action === CONSTANTS.AUTOSCROLL_ACTION_NOTHING;
 	};
 	
-	const onTrackingContinued = function(anyNewMessages) {
+	const onTrackingContinued = function(anyNewMessages, hasMoreBefore) {
 		if (!STATE.isTracking()) {
 			return;
 		}
@@ -63,7 +68,7 @@
 		if (SETTINGS.autoscroll) {
 			let action = null;
 			
-			if (!DISCORD.hasMoreMessages()) {
+			if (!hasMoreBefore) {
 				console.debug("[DHT] Reached first message.");
 				action = SETTINGS.afterFirstMsg;
 			}
@@ -84,7 +89,7 @@
 	
 	let waitUntilSendingFinishedTimer = null;
 	
-	const onMessagesUpdated = async messages => {
+	const onMessagesUpdated = async (server, channel, messages, hasMoreBefore) => {
 		if (!STATE.isTracking() || delayedStopRequests > 0) {
 			return;
 		}
@@ -94,24 +99,16 @@
 			
 			waitUntilSendingFinishedTimer = window.setTimeout(() => {
 				waitUntilSendingFinishedTimer = null;
-				onMessagesUpdated(messages);
+				onMessagesUpdated(server, channel, messages, hasMoreBefore);
 			}, 100);
 			
 			return;
 		}
 		
-		const info = DISCORD.getSelectedChannel();
-		
-		if (!info) {
-			GUI.setStatus("Error (Unknown Channel)");
-			stopTrackingDelayed();
-			return;
-		}
-		
 		isSending = true;
 		
 		try {
-			await STATE.addDiscordChannel(info.server, info.channel);
+			await STATE.addDiscordChannel(server, channel);
 		} catch (e) {
 			onError(e);
 			return;
@@ -120,35 +117,33 @@
 		try {
 			if (!messages.length) {
 				isSending = false;
-				onTrackingContinued(false);
+				onTrackingContinued(false, hasMoreBefore);
 			}
 			else {
 				const anyNewMessages = await STATE.addDiscordMessages(messages);
-				onTrackingContinued(anyNewMessages);
+				onTrackingContinued(anyNewMessages, hasMoreBefore);
 			}
 		} catch (e) {
 			onError(e);
 		}
 	};
 	
-	DISCORD.setupMessageCallback(onMessagesUpdated);
+	const starter = DISCORD.setupMessageCallback(onMessagesUpdated);
 	
 	STATE.onTrackingStateChanged(enabled => {
 		if (enabled) {
-			const messages = DISCORD.getMessages();
-			
-			if (messages.length === 0) {
-				stopTrackingDelayed(() => alert("Cannot see any messages."));
-				return;
-			}
-			
 			GUI.setStatus("Starting");
+			GUI.createTrackingStyles();
 			hasJustStarted = true;
-			// noinspection JSIgnoredPromiseFromCall
-			onMessagesUpdated(messages);
+			
+			if (!starter()) {
+				stopTrackingDelayed(() => alert("Cannot see any messages."));
+				hasJustStarted = false;
+			}
 		}
 		else {
 			isSending = false;
+			GUI.deleteTrackingStyles();
 		}
 	});
 	

app/Resources/Tracker/scripts/discord.js

@@ -4,11 +4,26 @@ class DISCORD {
 	
 	// https://discord.com/developers/docs/resources/channel#channel-object-channel-types
 	static CHANNEL_TYPE = {
+		GUILD_TEXT: 0,
 		DM: 1,
 		GROUP_DM: 3,
+		GUILD_ANNOUNCEMENT: 5,
 		ANNOUNCEMENT_THREAD: 10,
 		PUBLIC_THREAD: 11,
-		PRIVATE_THREAD: 12
+		PRIVATE_THREAD: 12,
+		
+		isPrivate(type) {
+			return type === this.DM
+				|| type === this.GROUP_DM;
+		},
+		
+		isNavigableGuildChannel(type) {
+			return type === this.GUILD_TEXT
+				|| type === this.GUILD_ANNOUNCEMENT
+				|| type === this.ANNOUNCEMENT_THREAD
+				|| type === this.PUBLIC_THREAD
+				|| type === this.PRIVATE_THREAD;
+		}
 	};
 	
 	// https://discord.com/developers/docs/resources/channel#message-object-message-types
@@ -18,6 +33,74 @@ class DISCORD {
 		THREAD_STARTER: 21
 	};
 	
+	// https://discord.com/developers/docs/topics/permissions#permissions-bitwise-permission-flags
+	static PERMISSION = {
+		VIEW_CHANNEL: 1n << 10n
+	};
+	
+	/**
+	 * @type {Object}
+	 * @property {function(String): ?DiscordGuild} getGuild
+	 */
+	static #guildStore = WEBPACK.findModule("guildStore", WEBPACK.filterByProps("getGuild", "getGuilds", "getGuildIds"));
+	
+	/**
+	 * @type {Object}
+	 * @property {function(String): Boolean} isOptInEnabled
+	 * @property {function(String): Set<String>} getOptedInChannels
+	 */
+	static #guildSettings = WEBPACK.findModule("guildSettings", WEBPACK.filterByProps("isOptInEnabled", "getOptedInChannels"));
+	
+	/**
+	 * @type {Object}
+	 * @property {function(String): ?DiscordChannel} getChannel
+	 * @property {function(String): Array<DiscordChannel>} getMutableGuildChannelsForGuild
+	 * @property {function(): Array<DiscordChannel>} getSortedPrivateChannels
+	 */
+	static #channelStore = WEBPACK.findModule("channelStore", WEBPACK.filterByProps("getChannel", "getMutableGuildChannelsForGuild", "getSortedPrivateChannels"));
+	
+	/**
+	 * @type {function(BigInt, Object): Boolean}
+	 */
+	static #hasPermission = WEBPACK.findFunction("can", [ "getGuildPermissions", "getChannelPermissions" ]);
+	
+	/**
+	 * @type {function(String): MessageData}
+	 */
+	static #getMessages = WEBPACK.findFunction("getMessages");
+	
+	/**
+	 * @type {function(String): void}
+	 */
+	static #jumpToMessage = WEBPACK.findFunction("jumpToMessage");
+	
+	/**
+	 * @type {function(): String}
+	 */
+	static #getCurrentlySelectedChannelId = WEBPACK.findFunction("getCurrentlySelectedChannelId");
+	
+	/**
+	 * @type {function(String): void}
+	 */
+	static #selectPrivateChannel = WEBPACK.findFunction("selectPrivateChannel", [ "selectChannel" ]);
+	
+	/**
+	 * @type {function(String, Object, String=null): void}
+	 */
+	static #transitionToGuildSync = WEBPACK.findFunction("transitionToGuildSync");
+	
+	static isCompatible() {
+		return !!this.#guildStore
+			&& !!this.#guildSettings
+			&& !!this.#channelStore
+			&& !!this.#hasPermission
+			&& !!this.#getMessages
+			&& !!this.#jumpToMessage
+			&& !!this.#getCurrentlySelectedChannelId
+			&& !!this.#selectPrivateChannel
+			&& !!this.#transitionToGuildSync;
+	}
+	
 	static getMessageOuterElement() {
 		return DOM.queryReactClass("messagesWrapper");
 	}
@@ -26,14 +109,6 @@ class DISCORD {
 		return DOM.queryReactClass("scroller", this.getMessageOuterElement());
 	}
 	
-	static getMessageElements() {
-		return this.getMessageOuterElement().querySelectorAll("[class*='message_']");
-	}
-	
-	static hasMoreMessages() {
-		return document.querySelector("#messagesNavigationDescription + [class^=container]") === null;
-	}
-	
 	static loadOlderMessages() {
 		const view = this.getMessageScrollerElement();
 		
@@ -42,26 +117,43 @@ class DISCORD {
 		}
 	}
 	
+	static getMessagesFromSelectedChannel() {
+		const channelId = this.#getCurrentlySelectedChannelId();
+		return channelId ? this.#getMessages(channelId) : null;
+	}
+	
 	/**
 	 * Calls the provided function with a list of messages whenever the currently loaded messages change.
+	 * @param callback {function(server: ?DiscordGuild, channel: DiscordChannel, messages: Array<DiscordMessage>, hasMoreBefore: boolean)}
 	 */
 	static setupMessageCallback(callback) {
 		const previousMessages = new Set();
 		
-		const onMessageElementsChanged = function() {
-			const messages = DISCORD.getMessages();
-			const hasChanged = messages.some(message => !previousMessages.has(message.id)) || !DISCORD.hasMoreMessages();
+		const onMessageElementsChanged = force => {
+			const messages = this.getMessagesFromSelectedChannel();
+			if (!messages || !messages.ready || messages.loadingMore) {
+				return false;
+			}
 			
+			const channel = this.#channelStore.getChannel(messages.channelId);
+			if (!channel) {
+				return false;
+			}
+			
+			const hasChanged = force || !messages.hasMoreBefore || messages.some(message => !previousMessages.has(message.id));
 			if (!hasChanged) {
-				return;
+				return false;
 			}
 			
 			previousMessages.clear();
-			for (const message of messages) {
+			for (const message of messages._array) {
 				previousMessages.add(message.id);
 			}
 			
-			callback(messages);
+			const server = this.#guildStore.getGuild(channel.guild_id);
+			
+			callback(server, channel, messages._array, messages.hasMoreBefore);
+			return true;
 		};
 		
 		let debounceTimer;
@@ -74,7 +166,7 @@ class DISCORD {
 			debounceTimer = window.setTimeout(onMessageElementsChanged, 100);
 		};
 		
-		const observer = new MutationObserver(function () {
+		const observer = new MutationObserver(function() {
 			onMessageElementsChangedLater();
 		});
 		
@@ -112,216 +204,54 @@ class DISCORD {
 			observedElement = null;
 			window.clearInterval(observerTimer);
 		});
-	}
-	
-	/**
-	 * Returns the message from a message element.
-	 * @returns { null | DiscordMessage } }
-	 */
-	static getMessageFromElement(ele) {
-		const props = DOM.getReactProps(ele);
 		
-		if (props && Array.isArray(props.children)) {
-			for (const child of props.children) {
-				if (!(child instanceof Object)) {
-					continue;
-				}
-				
-				const childProps = child.props;
-				if (childProps instanceof Object && "message" in childProps) {
-					return childProps.message;
-				}
-			}
-		}
-		
-		return null;
-	}
-	
-	/**
-	 * Returns an array containing currently loaded messages.
-	 */
-	static getMessages() {
-		try {
-			const messages = [];
-			
-			for (const ele of this.getMessageElements()) {
-				try {
-					const message = this.getMessageFromElement(ele);
-					
-					if (message != null) {
-						messages.push(message);
-					}
-				} catch (e) {
-					console.error("[DHT] Error extracing message data, skipping it.", e, ele, DOM.tryGetReactProps(ele));
-				}
-			}
-			
-			return messages;
-		} catch (e) {
-			console.error("[DHT] Error retrieving messages.", e);
-			return [];
-		}
-	}
-	
-	/**
-	 * Returns an object containing the selected server and channel information.
-	 * For types DM and GROUP, the server and channel ids and names are identical.
-	 * @returns { {} | null }
-	 */
-	static getSelectedChannel() {
-		try {
-			let obj = null;
-			
-			try {
-				for (const child of DOM.getReactProps(DOM.queryReactClass("chatContent")).children) {
-					if (child && child.props && child.props.channel) {
-						obj = child.props.channel;
-						break;
-					}
-				}
-			} catch (e) {
-				console.error("[DHT] Error retrieving selected channel from 'chatContent' element.", e);
-			}
-			
-			if (!obj || typeof obj.id !== "string") {
-				return null;
-			}
-			
-			const dms = DOM.queryReactClass("privateChannels");
-			
-			if (dms) {
-				let name;
-				
-				for (const ele of dms.querySelectorAll("[class*='channel_'] [class*='selected_'] [class^='name_'] *")) {
-					const node = Array.prototype.find.call(ele.childNodes, node => node.nodeType === Node.TEXT_NODE);
-					
-					if (node) {
-						name = node.nodeValue;
-						break;
-					}
-				}
-				
-				if (!name) {
-					return null;
-				}
-				
-				let type;
-				
-				// https://discord.com/developers/docs/resources/channel#channel-object-channel-types
-				switch (obj.type) {
-					case DISCORD.CHANNEL_TYPE.DM: type = "DM"; break;
-					case DISCORD.CHANNEL_TYPE.GROUP_DM: type = "GROUP"; break;
-					default: return null;
-				}
-				
-				const id = obj.id;
-				const server = { id, name, type };
-				const channel = { id, name };
-				
-				return { server, channel };
-			}
-			else if (obj.guild_id) {
-				let guild;
-				
-				for (const child of DOM.getReactProps(document.querySelector("nav header [class*='headerContent_']")).children) {
-					if (child && child.props && child.props.guild) {
-						guild = child.props.guild;
-						break;
-					}
-				}
-				
-				if (!guild || typeof guild.name !== "string" || obj.guild_id !== guild.id) {
-					return null;
-				}
-				
-				const server = {
-					"id": guild.id,
-					"name": guild.name,
-					"type": "SERVER"
-				};
-				
-				const channel = {
-					"id": obj.id,
-					"name": obj.name,
-					"extra": {
-						"nsfw": obj.nsfw
-					}
-				};
-				
-				if (obj.type === DISCORD.CHANNEL_TYPE.ANNOUNCEMENT_THREAD || obj.type === DISCORD.CHANNEL_TYPE.PUBLIC_THREAD || obj.type === DISCORD.CHANNEL_TYPE.PRIVATE_THREAD) {
-					channel["extra"]["parent"] = obj.parent_id;
-				}
-				else {
-					channel["extra"]["position"] = obj.position;
-					channel["extra"]["topic"] = obj.topic;
-				}
-				
-				return { server, channel };
-			}
-			else {
-				return null;
-			}
-		} catch (e) {
-			console.error("[DHT] Error retrieving selected channel.", e);
-			return null;
-		}
+		return () => onMessageElementsChanged(true);
 	}
 	
 	/**
 	 * Selects the next text channel and returns true, otherwise returns false if there are no more channels.
 	 */
 	static selectNextTextChannel() {
-		const dms = DOM.queryReactClass("privateChannels");
+		const currentChannel = this.#channelStore.getChannel(this.#getCurrentlySelectedChannelId());
+		if (!currentChannel) {
+			return false;
+		}
 		
-		if (dms) {
-			const currentChannel = DOM.queryReactClass("selected", dms);
-			const currentChannelContainer = currentChannel && currentChannel.closest("[class*='channel_']");
-			const nextChannel = currentChannelContainer && currentChannelContainer.nextElementSibling;
+		if (this.CHANNEL_TYPE.isPrivate(currentChannel.type)) {
+			const privateChannel = this.#channelStore.getSortedPrivateChannels();
+			const currentIndex = privateChannel.findIndex(channel => channel.id === currentChannel.id);
 			
-			if (!nextChannel || !nextChannel.getAttribute("class").includes("channel_")) {
+			if (currentIndex === -1 || currentIndex === privateChannel.length - 1) {
 				return false;
 			}
 			
-			const nextChannelLink = nextChannel.querySelector("a[href*='/@me/']");
-			if (!nextChannelLink) {
-				return false;
-			}
-			
-			nextChannelLink.click();
-			nextChannelLink.scrollIntoView(true);
+			this.#selectPrivateChannel(privateChannel[currentIndex + 1].id);
 			return true;
 		}
 		else {
-			const channelListEle = document.getElementById("channels");
-			if (!channelListEle) {
+			const guildId = currentChannel.guild_id;
+			
+			let isChannelOptedIn;
+			if (this.#guildSettings.isOptInEnabled(guildId)) {
+				const optedInChannels = this.#guildSettings.getOptedInChannels(guildId);
+				isChannelOptedIn = channel => optedInChannels.has(channel.id);
+			}
+			else {
+				isChannelOptedIn = _ => true;
+			}
+			
+			const guildChannelMap = this.#channelStore.getMutableGuildChannelsForGuild(guildId);
+			const guildChannels = Object.values(guildChannelMap)
+				.filter(channel => this.CHANNEL_TYPE.isNavigableGuildChannel(channel.type) && isChannelOptedIn(channel) && this.#hasPermission(this.PERMISSION.VIEW_CHANNEL, channel))
+				.sort((a, b) => a.position - b.position);
+			
+			const currentIndex = guildChannels.findIndex(channel => channel.id === currentChannel.id);
+			
+			if (currentIndex === -1 || currentIndex === guildChannels.length - 1) {
 				return false;
 			}
 			
-			function getLinkElement(channel) {
-				return channel.querySelector("a[href^='/channels/'][role='link']");
-			}
-			
-			const allTextChannels = Array.prototype.filter.call(channelListEle.querySelectorAll("[class*='containerDefault']"), ele => getLinkElement(ele) !== null);
-			let nextChannel = null;
-			
-			for (let index = 0; index < allTextChannels.length - 1; index++) {
-				if (allTextChannels[index].className.includes("selected_")) {
-					nextChannel = allTextChannels[index + 1];
-					break;
-				}
-			}
-			
-			if (nextChannel === null) {
-				return false;
-			}
-			
-			const nextChannelLink = getLinkElement(nextChannel);
-			if (!nextChannelLink) {
-				return false;
-			}
-			
-			nextChannelLink.click();
-			nextChannel.scrollIntoView(true);
+			this.#transitionToGuildSync(guildId, {}, guildChannels[currentIndex + 1].id);
 			return true;
 		}
 	}

app/Resources/Tracker/scripts/dom.js

@@ -1,6 +1,8 @@
 class DOM {
 	/**
 	 * Returns a child element by its ID. Parent defaults to the entire document.
+	 * @param {string} id
+	 * @param {HTMLElement?} [parent]
 	 * @returns {HTMLElement}
 	 */
 	static id(id, parent) {
@@ -9,6 +11,9 @@ class DOM {
 	
 	/**
 	 * Returns the first child element containing the specified obfuscated class. Parent defaults to the entire document.
+	 * @param {string} cls
+	 * @param {HTMLElement?} [parent]
+	 * @returns {HTMLElement}
 	 */
 	static queryReactClass(cls, parent) {
 		return (parent || document).querySelector(`[class*="${cls}_"]`);
@@ -55,31 +60,4 @@ class DOM {
 		const value = document.cookie.replace(new RegExp("(?:(?:^|.*;\\s*)" + name + "\\s*\\=\\s*([^;]*).*$)|^.*$"), "$1");
 		return value.length ? JSON.parse(decodeURIComponent(value)) : null;
 	}
-	
-	/**
-	 * Returns internal React state object of an element.
-	 */
-	static getReactProps(ele) {
-		const keys = Object.keys(ele || {});
-		let key = keys.find(key => key.startsWith("__reactInternalInstance"));
-		
-		if (key) {
-			// noinspection JSUnresolvedVariable
-			return ele[key].memoizedProps;
-		}
-		
-		key = keys.find(key => key.startsWith("__reactProps$"));
-		return key ? ele[key] : null;
-	}
-	
-	/**
-	 * Returns internal React state object of an element, or null if the retrieval throws.
-	 */
-	static tryGetReactProps(ele) {
-		try {
-			return this.getReactProps(ele);
-		} catch (e) {
-			return null;
-		}
-	}
 }

app/Resources/Tracker/scripts/gui.js

@@ -2,14 +2,17 @@
 const GUI = (function() {
 	let controller = null;
 	let settings = null;
+	let trackingStyles = null;
 	
 	const stateChangedEvent = () => {
 		if (settings) {
 			settings.ui.cbAutoscroll.checked = SETTINGS.autoscroll;
+			settings.ui.cbHidePreviewsWhileAutoscrolling.checked = SETTINGS.hidePreviewsWhileAutoscrolling;
 			settings.ui.optsAfterFirstMsg[SETTINGS.afterFirstMsg].checked = true;
 			settings.ui.optsAfterSavedMsg[SETTINGS.afterSavedMsg].checked = true;
 			
 			const autoscrollDisabled = !SETTINGS.autoscroll;
+			settings.ui.cbHidePreviewsWhileAutoscrolling.disabled = autoscrollDisabled;
 			Object.values(settings.ui.optsAfterFirstMsg).forEach(ele => ele.disabled = autoscrollDisabled);
 			Object.values(settings.ui.optsAfterSavedMsg).forEach(ele => ele.disabled = autoscrollDisabled);
 		}
@@ -54,6 +57,7 @@ const GUI = (function() {
 			
 			controller.ui.btnClose.addEventListener("click", () => {
 				this.hideController();
+				this.deleteTrackingStyles();
 				window.DHT_ON_UNLOAD.forEach(f => f());
 				delete window.DHT_ON_UNLOAD;
 				delete window.DHT_LOADED;
@@ -84,6 +88,7 @@ const GUI = (function() {
 			const radio = (type, id, label) => "<label><input id='dht-cfg-" + type + "-" + id + "' name='dht-" + type + "' type='radio'> " + label + "</label><br>";
 			const html = `
 <label><input id='dht-cfg-autoscroll' type='checkbox'> Autoscroll</label><br>
+<label><input id='dht-cfg-hide-previews-while-autoscrolling' type='checkbox'> Hide previews to improve browser performance</label><br>
 <br>
 <label>After reaching the first message in channel...</label><br>
 ${radio("afm", "nothing", "Continue Tracking")}
@@ -93,8 +98,7 @@ ${radio("afm", "switch", "Switch to Next Channel")}
 <label>After reaching a previously saved message...</label><br>
 ${radio("asm", "nothing", "Continue Tracking")}
 ${radio("asm", "pause", "Pause Tracking")}
-${radio("asm", "switch", "Switch to Next Channel")}
-<p id='dht-cfg-note'>It is recommended to disable link and image previews to avoid putting unnecessary strain on your browser.</p>`;
+${radio("asm", "switch", "Switch to Next Channel")}`;
 			
 			settings = {
 				styles: DOM.createStyle(`/*[CSS-SETTINGS]*/`),
@@ -107,9 +111,10 @@ ${radio("asm", "switch", "Switch to Next Channel")}
 			});
 			
 			settings.ui = {
-				cbAutoscroll: DOM.id("dht-cfg-autoscroll"),
-				optsAfterFirstMsg: {},
-				optsAfterSavedMsg: {}
+				/** @type {HTMLInputElement} */ cbAutoscroll: DOM.id("dht-cfg-autoscroll"),
+				/** @type {HTMLInputElement} */ cbHidePreviewsWhileAutoscrolling: DOM.id("dht-cfg-hide-previews-while-autoscrolling"),
+				/** @type {Object.<number, HTMLInputElement>} */ optsAfterFirstMsg: {},
+				/** @type {Object.<number, HTMLInputElement>} */ optsAfterSavedMsg: {}
 			};
 			
 			settings.ui.optsAfterFirstMsg[CONSTANTS.AUTOSCROLL_ACTION_NOTHING] = DOM.id("dht-cfg-afm-nothing");
@@ -124,6 +129,10 @@ ${radio("asm", "switch", "Switch to Next Channel")}
 				SETTINGS.autoscroll = settings.ui.cbAutoscroll.checked;
 			});
 			
+			settings.ui.cbHidePreviewsWhileAutoscrolling.addEventListener("change", () => {
+				SETTINGS.hidePreviewsWhileAutoscrolling = settings.ui.cbHidePreviewsWhileAutoscrolling.checked;
+			});
+			
 			Object.keys(settings.ui.optsAfterFirstMsg).forEach(key => {
 				settings.ui.optsAfterFirstMsg[key].addEventListener("click", () => {
 					SETTINGS.afterFirstMsg = key;
@@ -152,6 +161,29 @@ ${radio("asm", "switch", "Switch to Next Channel")}
 			if (controller) {
 				controller.ui.textStatus.innerText = state;
 			}
+		},
+		
+		createTrackingStyles() {
+			if (trackingStyles) {
+				return;
+			}
+			
+			let style = "";
+			
+			if (SETTINGS.autoscroll && SETTINGS.hidePreviewsWhileAutoscrolling) {
+				style += `div[id^="message-accessories-"] { display: none; }`;
+			}
+			
+			if (style.length > 0) {
+				trackingStyles = DOM.createStyle(style);
+			}
+		},
+		
+		deleteTrackingStyles() {
+			if (trackingStyles) {
+				DOM.removeElement(trackingStyles);
+				trackingStyles = null;
+			}
 		}
 	};
 })();

app/Resources/Tracker/scripts/settings.js

@@ -35,17 +35,28 @@ const SETTINGS = (function() {
 		obj[name] = value;
 	};
 	
+	const defaults = {
+		"_autoscroll": true,
+		"_hidePreviewsWhileAutoscrolling": true,
+		"_afterFirstMsg": CONSTANTS.AUTOSCROLL_ACTION_PAUSE,
+		"_afterSavedMsg": CONSTANTS.AUTOSCROLL_ACTION_PAUSE,
+	};
+	
 	let loaded = DOM.loadFromCookie("DHT_SETTINGS");
+	let hasChanged = false;
 	
 	if (!loaded) {
-		loaded = {
-			"_autoscroll": true,
-			"_afterFirstMsg": CONSTANTS.AUTOSCROLL_ACTION_PAUSE,
-			"_afterSavedMsg": CONSTANTS.AUTOSCROLL_ACTION_PAUSE
-		};
-		
+		loaded = defaults;
 		IS_FIRST_RUN = true;
 	}
+	else {
+		for (const property in defaults) {
+			if (!(property in loaded)) {
+				loaded[property] = defaults[property];
+				hasChanged = true;
+			}
+		}
+	}
 	
 	const root = {
 		onSettingsChanged(callback) {
@@ -54,10 +65,11 @@ const SETTINGS = (function() {
 	};
 	
 	defineTriggeringProperty(root, "autoscroll", loaded._autoscroll);
+	defineTriggeringProperty(root, "hidePreviewsWhileAutoscrolling", loaded._hidePreviewsWhileAutoscrolling);
 	defineTriggeringProperty(root, "afterFirstMsg", loaded._afterFirstMsg);
 	defineTriggeringProperty(root, "afterSavedMsg", loaded._afterSavedMsg);
 	
-	if (IS_FIRST_RUN) {
+	if (IS_FIRST_RUN || hasChanged) {
 		saveSettings();
 	}
 	

app/Resources/Tracker/scripts/state.js

@@ -48,69 +48,49 @@ const STATE = (function() {
 		});
 	};
 	
+	const getDate = function(date) {
+		if (date instanceof Date) {
+			return date;
+		}
+		else {
+			// noinspection JSUnresolvedReference
+			return date.toDate();
+		}
+	};
+	
+	/**
+	 * @param {DiscordChannel} channel
+	 */
+	const getPrivateChannelName = function(channel) {
+		if (channel.name === "") {
+			return channel.rawRecipients.map(user => user.username).join(", ");
+		}
+		else {
+			return channel.name;
+		}
+	};
+	
+	/**
+	 * @param {Number} type
+	 */
+	const getChannelTypeName = function(type) {
+		if (type === DISCORD.CHANNEL_TYPE.DM) {
+			return "DM";
+		}
+		else if (type === DISCORD.CHANNEL_TYPE.GROUP_DM) {
+			return "GROUP";
+		}
+		else {
+			return "SERVER";
+		}
+	};
+	
 	const trackingStateChangedListeners = [];
 	let isTracking = false;
 	
 	const addedChannels = new Set();
 	const addedUsers = new Set();
 	
-	/**
-	 * @name DiscordUser
-	 * @property {String} id
-	 * @property {String} username
-	 * @property {String} discriminator
-	 * @property {String} [avatar]
-	 * @property {Boolean} [bot]
-	 */
-	
-	/**
-	 * @name DiscordMessage
-	 * @property {String} id
-	 * @property {String} channel_id
-	 * @property {DiscordUser} author
-	 * @property {String} content
-	 * @property {Timestamp} timestamp
-	 * @property {Timestamp|null} editedTimestamp
-	 * @property {DiscordAttachment[]} attachments
-	 * @property {Object[]} embeds
-	 * @property {DiscordMessageReaction[]} [reactions]
-	 * @property {DiscordMessageReference} [messageReference]
-	 * @property {Number} type
-	 * @property {String} state
-	 */
-	
-	/**
-	 * @name DiscordAttachment
-	 * @property {String} id
-	 * @property {String} filename
-	 * @property {String} [content_type]
-	 * @property {String} size
-	 * @property {String} url
-	 */
-	
-	/**
-	 * @name DiscordMessageReaction
-	 * @property {DiscordEmoji} emoji
-	 * @property {Number} count
-	 */
-	
-	/**
-	 * @name DiscordMessageReference
-	 * @property {String} [message_id]
-	 */
-	
-	/**
-	 * @name DiscordEmoji
-	 * @property {String|null} id
-	 * @property {String|null} name
-	 * @property {Boolean} animated
-	 */
-	
-	/**
-	 * @name Timestamp
-	 * @property {Function} toDate
-	 */
-	
 	return {
 		setup(port, token) {
 			serverPort = port;
@@ -141,32 +121,51 @@ const STATE = (function() {
 			}
 		},
 		
+		/**
+		 * @param {?DiscordGuild} serverInfo
+		 * @param {DiscordChannel} channelInfo
+		 */
 		async addDiscordChannel(serverInfo, channelInfo) {
 			if (addedChannels.has(channelInfo.id)) {
 				return;
 			}
 			
 			const server = {
-				id: serverInfo.id,
-				name: serverInfo.name,
-				type: serverInfo.type
+				type: getChannelTypeName(channelInfo.type)
 			};
 			
 			const channel = {
 				id: channelInfo.id,
-				name: channelInfo.name
+				extra: {}
 			};
 			
-			if ("extra" in channelInfo) {
-				const extra = channelInfo.extra;
-				
-				if ("parent" in extra) {
-					channel.parent = extra.parent;
-				}
-				
-				channel.position = extra.position;
-				channel.topic = extra.topic;
-				channel.nsfw = extra.nsfw;
+			if (DISCORD.CHANNEL_TYPE.isPrivate(channelInfo.type)) {
+				server.id = channelInfo.id;
+				server.name = channel.name = getPrivateChannelName(channelInfo);
+			}
+			else if (serverInfo) {
+				server.id = serverInfo.id;
+				server.name = serverInfo.name;
+				channel.name = channelInfo.name;
+			}
+			else {
+				return;
+			}
+			
+			if ("nsfw" in channelInfo) {
+				channel.extra.nsfw = channelInfo.nsfw;
+			}
+			
+			if ("topic" in channelInfo) {
+				channel.extra.topic = channelInfo.topic;
+			}
+			
+			if ("position" in channelInfo) {
+				channel.extra.position = channelInfo.position;
+			}
+			
+			if (channelInfo.type === DISCORD.CHANNEL_TYPE.ANNOUNCEMENT_THREAD || channelInfo.type === DISCORD.CHANNEL_TYPE.PUBLIC_THREAD || channelInfo.type === DISCORD.CHANNEL_TYPE.PRIVATE_THREAD) {
+				channel.extra.parent = channelInfo.parent_id;
 			}
 			
 			await post("/track-channel", { server, channel });
@@ -195,6 +194,10 @@ const STATE = (function() {
 						name: user.username
 					};
 					
+					if (user.globalName) {
+						obj.displayName = user.globalName;
+					}
+					
 					if (user.avatar) {
 						obj.avatar = user.avatar;
 					}
@@ -223,12 +226,12 @@ const STATE = (function() {
 					sender: msg.author.id,
 					channel: msg.channel_id,
 					text: msg.content,
-					timestamp: msg.timestamp.toDate().getTime()
+					timestamp: getDate(msg.timestamp).getTime()
 				};
 				
 				if (msg.editedTimestamp !== null) {
 					// noinspection JSUnusedGlobalSymbols
-					obj.editTimestamp = msg.editedTimestamp.toDate().getTime();
+					obj.editTimestamp = getDate(msg.editedTimestamp).getTime();
 				}
 				
 				if (msg.messageReference !== null) {
@@ -283,7 +286,7 @@ const STATE = (function() {
 				}
 				
 				if (msg.reactions.length > 0) {
-					obj.reactions = msg.reactions.map(reaction => {
+					obj.reactions = msg.reactions.filter(reaction => reaction.count > 0).map(reaction => {
 						const emoji = reaction.emoji;
 						
 						const mapped = {

app/Resources/Tracker/scripts/types.js

@@ -0,0 +1,82 @@
+/**
+ * @name DiscordGuild
+ * @property {String} id
+ * @property {String} name
+ */
+
+/**
+ * @name DiscordChannel
+ * @property {String} id
+ * @property {String} name
+ * @property {Number} type
+ * @property {String} [guild_id]
+ * @property {String} [parent_id]
+ * @property {Number} [position]
+ * @property {String} [topic]
+ * @property {Boolean} [nsfw]
+ * @property {DiscordUser[]} [rawRecipients]
+ */
+
+/**
+ * @name DiscordUser
+ * @property {String} id
+ * @property {String} username
+ * @property {String} discriminator
+ * @property {String} [globalName]
+ * @property {String} [avatar]
+ * @property {Boolean} [bot]
+ */
+
+/**
+ * @name DiscordMessage
+ * @property {String} id
+ * @property {String} channel_id
+ * @property {DiscordUser} author
+ * @property {String} content
+ * @property {Date} timestamp
+ * @property {Date|null} editedTimestamp
+ * @property {DiscordAttachment[]} attachments
+ * @property {Object[]} embeds
+ * @property {DiscordMessageReaction[]} [reactions]
+ * @property {DiscordMessageReference} [messageReference]
+ * @property {Number} type
+ * @property {String} state
+ */
+
+/**
+ * @name DiscordAttachment
+ * @property {String} id
+ * @property {String} filename
+ * @property {String} [content_type]
+ * @property {String} size
+ * @property {String} url
+ */
+
+/**
+ * @name DiscordMessageReaction
+ * @property {DiscordEmoji} emoji
+ * @property {Number} count
+ */
+
+/**
+ * @name DiscordMessageReference
+ * @property {String} [message_id]
+ */
+
+/**
+ * @name DiscordEmoji
+ * @property {String|null} id
+ * @property {String|null} name
+ * @property {Boolean} animated
+ */
+
+/**
+ * @name MessageData
+ * @type {Object}
+ * @property {String} channelId
+ * @property {Boolean} ready
+ * @property {Boolean} loadingMore
+ * @property {Boolean} hasMoreAfter
+ * @property {Boolean} hasMoreBefore
+ * @property {Array<DiscordMessage>} _array
+ */

app/Resources/Tracker/scripts/webpack.js

@@ -0,0 +1,98 @@
+/**
+ * Parts copied from Better Discord, licensed under Apache License 2.0.
+ * 
+ * https://github.com/BetterDiscord/BetterDiscord/blob/78edeb77c60542a57884686c4ba98f997c886fad/renderer/src/modules/webpackmodules.js
+ * https://github.com/BetterDiscord/BetterDiscord/blob/78edeb77c60542a57884686c4ba98f997c886fad/LICENSE
+ */
+class WEBPACK {
+	static get require() {
+		if (this._require) {
+			return this._require;
+		}
+		
+		/**
+		 * @type {Object}
+		 * @property {Object} m
+		 * @property {Object} c
+		 */
+		let hookedRequire;
+		
+		const id = "dht-webpackmodules-" + new Date().getTime();
+		if (typeof (window["webpackChunkdiscord_app"]) !== "undefined") {
+			window["webpackChunkdiscord_app"].push([ [ id ], {}, internalRequire => hookedRequire = internalRequire ]);
+		}
+		
+		delete hookedRequire.m[id];
+		delete hookedRequire.c[id];
+		return this._require = hookedRequire;
+	}
+	
+	static getAllModules() {
+		return this.require.c;
+	}
+	
+	static filterByProps(...props) {
+		return module => props.every(prop => prop in module);
+	}
+	
+	static filterByPropsWithPredicate(predicate, ...props) {
+		return module => props.every(prop => prop in module && predicate(module[prop]));
+	}
+	
+	static findModules(filter) {
+		const defaultExport = true;
+		const moduleFilter = module => (typeof module === "object" || typeof module === "function") && filter(module);
+		
+		const results = [];
+		
+		for (const module of Object.values(this.getAllModules())) {
+			/**
+			 * @type {Object}
+			 * @property [Z]
+			 * @property [ZP]
+			 * @property [__esModule]
+			 * @property [default]
+			 */
+			const exports = module.exports;
+			if (!exports || exports === window || exports === document.documentElement || exports[Symbol.toStringTag] === "DOMTokenList") {
+				continue;
+			}
+			
+			let foundModule = null;
+			if (exports.Z && moduleFilter(exports.Z)) {
+				foundModule = defaultExport ? exports.Z : exports;
+			}
+			if (exports.ZP && moduleFilter(exports.ZP)) {
+				foundModule = defaultExport ? exports.ZP : exports;
+			}
+			if (exports.__esModule && exports.default && moduleFilter(exports.default)) {
+				foundModule = defaultExport ? exports.default : exports;
+			}
+			if (moduleFilter(exports)) {
+				foundModule = exports;
+			}
+			
+			if (foundModule) {
+				results.push(foundModule);
+			}
+		}
+		
+		return results;
+	}
+	
+	static findModule(name, filter) {
+		const modules = this.findModules(filter);
+		if (modules.length === 1) {
+			return modules[0];
+		}
+		
+		console.error("[DHT] Cannot find module " + name + ", results found:", modules.length);
+		return null;
+	}
+	
+	static findFunction(name, additionalRequiredProps) {
+		const searchedProps = additionalRequiredProps ? [name, ...additionalRequiredProps] : [name];
+		const matchingModule = this.findModule("containing function " + name, this.filterByPropsWithPredicate(prop => typeof(prop) === "function", ...searchedProps));
+		return matchingModule == null ? null : matchingModule[name].bind(matchingModule);
+	}
+}

app/Resources/Tracker/styles/settings.css

@@ -18,11 +18,13 @@
   height: 262px;
   margin-left: -400px;
   margin-top: -131px;
+  line-height: 120%;
   padding: 8px;
   background-color: #fff;
   z-index: 1000002;
 }
 
-#dht-cfg-note {
-  margin-top: 22px;
+#dht-cfg label {
+  display: inline-block;
+  margin: 1px 0;
 }

app/Resources/Viewer/index.html

@@ -2,20 +2,31 @@
 <html lang="en">
   <head>
     <meta charset="utf-8">
+    <meta name="referrer" content="no-referrer">
+    
     <title>Discord Offline History</title>
     
+    <link rel="icon" href="favicon.ico">
+    
+    <link rel="stylesheet" href="styles/main.css">
+    <link rel="stylesheet" href="styles/menu.css">
+    <link rel="stylesheet" href="styles/channels.css">
+    <link rel="stylesheet" href="styles/messages.css">
+    <link rel="stylesheet" href="styles/modal.css">
+    
     <script type="text/javascript">
-		window.DHT_EMBEDDED = "/*[ARCHIVE]*/";
-		/*[JS]*/
+		const query = new URLSearchParams(location.search);
+		window.DHT_SERVER_TOKEN = query.get("token");
+		window.DHT_SERVER_SESSION = query.get("session");
     </script>
-    <style>
-      /*[CSS]*/
-    </style>
+    <script type="module" src="scripts/bootstrap.mjs"></script>
   </head>
   <body>
     <div id="menu">
       <button id="btn-settings">Settings</button>
       
+      <div class="splitter"></div>
+      
       <div> <!-- needed to stop the select from messing up -->
         <select id="opt-messages-per-page">
           <option value="50">50 messages per page&nbsp;</option>
@@ -64,7 +75,9 @@
     </div>
     
     <div id="app">
-      <div id="channels"></div>
+      <div id="channels">
+        <div class="loading"></div>
+      </div>
       <div id="messages"></div>
     </div>
     

app/Resources/Viewer/scripts/bootstrap.js

@@ -1,39 +0,0 @@
-document.addEventListener("DOMContentLoaded", () => {
-	DISCORD.setup();
-	GUI.setup();
-	
-	GUI.onOptionMessagesPerPageChanged(() => {
-		STATE.setMessagesPerPage(GUI.getOptionMessagesPerPage());
-	});
-	
-	STATE.setMessagesPerPage(GUI.getOptionMessagesPerPage());
-	
-	GUI.onOptMessageFilterChanged(filter => {
-		STATE.setActiveFilter(filter);
-	});
-	
-	GUI.onNavigationButtonClicked(action => {
-		STATE.updateCurrentPage(action);
-	});
-	
-	STATE.onUsersRefreshed(users => {
-		GUI.updateUserList(users);
-	});
-	
-	STATE.onChannelsRefreshed((channels, selected) => {
-		GUI.updateChannelList(channels, selected, STATE.selectChannel);
-	});
-	
-	STATE.onMessagesRefreshed(messages => {
-		GUI.updateNavigation(STATE.getCurrentPage(), STATE.getPageCount());
-		GUI.updateMessageList(messages);
-		GUI.scrollMessagesToTop();
-	});
-	
-	try {
-		STATE.uploadFile(JSON.parse(window.DHT_EMBEDDED));
-	} catch (e) {
-		console.error(e);
-		alert("Could not parse embedded file, see console for details.");
-	}
-});

app/Resources/Viewer/scripts/bootstrap.mjs

@@ -0,0 +1,111 @@
+import discord from "./discord.mjs";
+import gui from "./gui.mjs";
+import state from "./state.mjs";
+import "./polyfills.mjs";
+
+window.DISCORD = discord;
+
+document.addEventListener("DOMContentLoaded", () => {
+	discord.setup();
+	gui.setup();
+	
+	gui.onOptionMessagesPerPageChanged(() => {
+		state.setMessagesPerPage(gui.getOptionMessagesPerPage());
+	});
+	
+	state.setMessagesPerPage(gui.getOptionMessagesPerPage());
+	
+	gui.onOptMessageFilterChanged(filter => {
+		state.setActiveFilter(filter);
+	});
+	
+	gui.onNavigationButtonClicked(action => {
+		state.updateCurrentPage(action);
+	});
+	
+	state.onUsersRefreshed(users => {
+		gui.updateUserList(users);
+	});
+	
+	state.onChannelsRefreshed((channels, selected) => {
+		gui.updateChannelList(channels, selected, state.selectChannel);
+	});
+	
+	state.onMessagesRefreshed(messages => {
+		gui.updateNavigation(state.getCurrentPage(), state.getPageCount());
+		gui.updateMessageList(messages);
+		gui.scrollMessagesToTop();
+	});
+	
+	async function fetchUrl(path, contentType) {
+		const response = await fetch("/" + path + "?token=" + encodeURIComponent(window.DHT_SERVER_TOKEN) + "&session=" + encodeURIComponent(window.DHT_SERVER_SESSION), {
+			method: "GET",
+			headers: {
+				"Content-Type": contentType,
+			},
+			credentials: "omit",
+			redirect: "error",
+		});
+		
+		if (!response.ok) {
+			throw "Unexpected response status: " + response.statusText;
+		}
+		
+		return response;
+	}
+	
+	async function processLines(response, callback) {
+		let body = "";
+		
+		for await (const chunk of response.body.pipeThrough(new TextDecoderStream("utf-8"))) {
+			body += chunk;
+			
+			let startIndex = 0;
+			
+			while (true) {
+				const endIndex = body.indexOf("\n", startIndex);
+				if (endIndex === -1) {
+					break;
+				}
+				
+				callback(body.substring(startIndex, endIndex));
+				startIndex = endIndex + 1;
+			}
+			
+			body = body.substring(startIndex);
+		}
+		
+		if (body !== "") {
+			callback(body);
+		}
+	}
+	
+	async function loadData() {
+		try {
+			const metadataResponse = await fetchUrl("get-viewer-metadata", "application/json");
+			const metadataJson = await metadataResponse.json();
+			
+			const messagesResponse = await fetchUrl("get-viewer-messages", "application/x-ndjson");
+			const messages = {};
+			
+			await processLines(messagesResponse, line => {
+				const message = JSON.parse(line);
+				const channel = message.c;
+				
+				const channelMessages = messages[channel] || (messages[channel] = {});
+				channelMessages[message.id] = message;
+				
+				delete message.id;
+				delete message.c;
+			});
+			
+			state.uploadFile(metadataJson, messages);
+		} catch (e) {
+			console.error(e);
+			alert("Could not load data, see console for details.");
+			document.querySelector("#channels > div.loading").remove();
+		}
+	}
+	
+	loadData();
+});

app/Resources/Viewer/scripts/discord.mjs

@@ -1,4 +1,10 @@
-const DISCORD = (function() {
+import discord from "./discord.mjs";
+import dom from "./dom.mjs";
+import template from "./template.mjs";
+import settings from "./settings.mjs";
+import state from "./state.mjs";
+
+export default (function() {
 	const regex = {
 		formatBold: /\*\*([\s\S]+?)\*\*(?!\*)/g,
 		formatItalic1: /\*([\s\S]+?)\*(?!\*)/g,
@@ -35,10 +41,24 @@ const DISCORD = (function() {
 	let templateReaction;
 	let templateReactionCustom;
 	
+	const fileUrlProcessor = function(serverToken) {
+		if (typeof serverToken === "string") {
+			return url => "/get-downloaded-file/" + encodeURIComponent(url) + "?token=" + encodeURIComponent(serverToken);
+		}
+		else {
+			return url => url;
+		}
+	}(window.DHT_SERVER_TOKEN);
+	
+	const getEmoji = function(name, id, extension) {
+		const tag = ":" + name + ":";
+		return "<img src='" + fileUrlProcessor("https://cdn.discordapp.com/emojis/" + id + "." + extension) + "' alt='" + tag + "' title='" + tag + "' class='emoji'>";
+	};
+	
 	const processMessageContents = function(contents) {
-		let processed = DOM.escapeHTML(contents.replace(regex.formatUrlNoEmbed, "$1"));
+		let processed = dom.escapeHTML(contents.replace(regex.formatUrlNoEmbed, "$1"));
 		
-		if (SETTINGS.enableFormatting) {
+		if (settings.enableFormatting) {
 			const escapeHtmlMatch = (full, match) => "&#" + match.charCodeAt(0) + ";";
 			
 			processed = processed
@@ -54,29 +74,33 @@ const DISCORD = (function() {
 				.replace(regex.formatStrike, "<s>$1</s>");
 		}
 		
-		const animatedEmojiExtension = SETTINGS.enableAnimatedEmoji ? "gif" : "png";
+		const animatedEmojiExtension = settings.enableAnimatedEmoji ? "gif" : "webp";
 		
 		// noinspection HtmlUnknownTarget
 		processed = processed
 			.replace(regex.formatUrl, "<a href='$1' target='_blank' rel='noreferrer'>$1</a>")
-			.replace(regex.mentionChannel, (full, match) => "<span class='link mention-chat'>#" + STATE.getChannelName(match) + "</span>")
-			.replace(regex.mentionUser, (full, match) => "<span class='link mention-user' title='#" + (STATE.getUserTag(match) || "????") + "'>@" + STATE.getUserName(match) + "</span>")
-			.replace(regex.customEmojiStatic, "<img src='https://cdn.discordapp.com/emojis/$2.png' alt=':$1:' title=':$1:' class='emoji'>")
-			.replace(regex.customEmojiAnimated, "<img src='https://cdn.discordapp.com/emojis/$2." + animatedEmojiExtension + "' alt=':$1:' title=':$1:' class='emoji'>");
+			.replace(regex.mentionChannel, (full, match) => "<span class='link mention-chat'>#" + state.getChannelName(match) + "</span>")
+			.replace(regex.mentionUser, (full, match) => "<span class='link mention-user' title='" + state.getUserName(match) + "'>@" + state.getUserDisplayName(match) + "</span>")
+			.replace(regex.customEmojiStatic, (full, m1, m2) => getEmoji(m1, m2, "webp"))
+			.replace(regex.customEmojiAnimated, (full, m1, m2) => getEmoji(m1, m2, animatedEmojiExtension));
 		
 		return "<p>" + processed + "</p>";
 	};
 	
+	const getAvatarUrlObject = function(avatar) {
+		return { url: fileUrlProcessor("https://cdn.discordapp.com/avatars/" + avatar.id + "/" + avatar.path + ".webp") };
+	};
+	
 	const getImageEmbed = function(url, image) {
-		if (!SETTINGS.enableImagePreviews) {
+		if (!settings.enableImagePreviews) {
 			return "";
 		}
 		
 		if (image.width && image.height) {
-			return templateEmbedImageWithSize.apply({ url, src: image.url, width: image.width, height: image.height });
+			return templateEmbedImageWithSize.apply({ url: fileUrlProcessor(url), src: fileUrlProcessor(image.url), width: image.width, height: image.height });
 		}
 		else {
-			return templateEmbedImage.apply({ url, src: image.url });
+			return templateEmbedImage.apply({ url: fileUrlProcessor(url), src: fileUrlProcessor(image.url) });
 		}
 	};
 	
@@ -88,36 +112,36 @@ const DISCORD = (function() {
 	
 	return {
 		setup() {
-			templateChannelServer = new TEMPLATE([
-				"<div data-channel='{id}'>",
+			templateChannelServer = new template([
+				"<div class='channel' data-channel='{id}'>",
 				"<div class='info' title='{topic}'><strong class='name'>#{name}</strong>{nsfw}<span class='tag'>{msgcount}</span></div>",
 				"<span class='server'>{server.name} ({server.type})</span>",
 				"</div>"
 			].join(""));
 			
-			templateChannelPrivate = new TEMPLATE([
-				"<div data-channel='{id}'>",
+			templateChannelPrivate = new template([
+				"<div class='channel' data-channel='{id}'>",
 				"<div class='info'><strong class='name'>{name}</strong><span class='tag'>{msgcount}</span></div>",
 				"<span class='server'>({server.type})</span>",
 				"</div>"
 			].join(""));
 			
-			templateMessageNoAvatar = new TEMPLATE([
+			templateMessageNoAvatar = new template([
 				"<div>",
 				"<div class='reply-message'>{reply}</div>",
-				"<h2><strong class='username' title='#{user.tag}'>{user.name}</strong><span class='info time'>{timestamp}</span>{edit}{jump}</h2>",
+				"<h2><strong class='username' title='{user.name}'>{user.displayName}</strong><span class='info time'>{timestamp}</span>{edit}{jump}</h2>",
 				"<div class='message'>{contents}{embeds}{attachments}</div>",
 				"{reactions}",
 				"</div>"
 			].join(""));
 			
-			templateMessageWithAvatar = new TEMPLATE([
+			templateMessageWithAvatar = new template([
 				"<div>",
 				"<div class='reply-message reply-message-with-avatar'>{reply}</div>",
 				"<div class='avatar-wrapper'>",
 				"<div class='avatar'>{avatar}</div>",
 				"<div>",
-				"<h2><strong class='username' title='#{user.tag}'>{user.name}</strong><span class='info time'>{timestamp}</span>{edit}{jump}</h2>",
+				"<h2><strong class='username' title='{user.name}'>{user.displayName}</strong><span class='info time'>{timestamp}</span>{edit}{jump}</h2>",
 				"<div class='message'>{contents}{embeds}{attachments}</div>",
 				"{reactions}",
 				"</div>",
@@ -125,50 +149,52 @@ const DISCORD = (function() {
 				"</div>"
 			].join(""));
 			
-			templateUserAvatar = new TEMPLATE([
-				"<img src='https://cdn.discordapp.com/avatars/{id}/{path}.webp?size=128' alt=''>"
+			// noinspection HtmlUnknownTarget
+			templateUserAvatar = new template([
+				"<img src='{url}' alt=''>"
 			].join(""));
 			
 			// noinspection HtmlUnknownTarget
-			templateAttachmentDownload = new TEMPLATE([
+			templateAttachmentDownload = new template([
 				"<a href='{url}' class='embed download'>Download {name}</a>"
 			].join(""));
 			
 			// noinspection HtmlUnknownTarget
-			templateEmbedImage = new TEMPLATE([
-				"<a href='{url}' class='embed thumbnail loading'><img src='{src}' alt='' onload='DISCORD.handleImageLoad(this)' onerror='DISCORD.handleImageLoadError(this)'></a><br>"
+			templateEmbedImage = new template([
+				"<a href='{url}' class='embed thumbnail loading'><img src='{src}' alt='' onload='window.DISCORD.handleImageLoad(this)' onerror='window.DISCORD.handleImageLoadError(this)'></a><br>"
 			].join(""));
 			
 			// noinspection HtmlUnknownTarget
-			templateEmbedImageWithSize = new TEMPLATE([
-				"<a href='{url}' class='embed thumbnail loading'><img src='{src}' width='{width}' height='{height}' alt='' onload='DISCORD.handleImageLoad(this)' onerror='DISCORD.handleImageLoadError(this)'></a><br>"
+			templateEmbedImageWithSize = new template([
+				"<a href='{url}' class='embed thumbnail loading'><img src='{src}' width='{width}' height='{height}' alt='' onload='window.DISCORD.handleImageLoad(this)' onerror='window.DISCORD.handleImageLoadError(this)'></a><br>"
 			].join(""));
 			
 			// noinspection HtmlUnknownTarget
-			templateEmbedRich = new TEMPLATE([
+			templateEmbedRich = new template([
 				"<div class='embed download'><a href='{url}' class='title'>{title}</a><p class='desc'>{description}</p></div>"
 			].join(""));
 			
 			// noinspection HtmlUnknownTarget
-			templateEmbedRichNoDescription = new TEMPLATE([
+			templateEmbedRichNoDescription = new template([
 				"<div class='embed download'><a href='{url}' class='title'>{title}</a></div>"
 			].join(""));
 			
 			// noinspection HtmlUnknownTarget
-			templateEmbedUrl = new TEMPLATE([
+			templateEmbedUrl = new template([
 				"<a href='{url}' class='embed download'>{url}</a>"
 			].join(""));
 			
-			templateEmbedUnsupported = new TEMPLATE([
+			templateEmbedUnsupported = new template([
 				"<div class='embed download'><p>(Unsupported embed)</p></div>"
 			].join(""));
 			
-			templateReaction = new TEMPLATE([
+			templateReaction = new template([
 				"<span class='reaction-wrapper'><span class='reaction-emoji'>{n}</span><span class='count'>{c}</span></span>"
 			].join(""));
 			
-			templateReactionCustom = new TEMPLATE([
-				"<span class='reaction-wrapper'><img src='https://cdn.discordapp.com/emojis/{id}.{ext}' alt=':{n}:' title=':{n}:' class='reaction-emoji-custom'><span class='count'>{c}</span></span>"
+			// noinspection HtmlUnknownTarget
+			templateReactionCustom = new template([
+				"<span class='reaction-wrapper'><img src='{url}' alt=':{n}:' title=':{n}:' class='reaction-emoji-custom'><span class='count'>{c}</span></span>"
 			].join(""));
 		},
 		
@@ -184,7 +210,7 @@ const DISCORD = (function() {
 		},
 		
 		isImageAttachment(attachment) {
-			const url = DOM.tryParseUrl(attachment.url);
+			const url = dom.tryParseUrl(attachment.url);
 			return url != null && isImageUrl(url);
 		},
 		
@@ -197,15 +223,15 @@ const DISCORD = (function() {
 		},
 		
 		getMessageHTML(message) { // noinspection FunctionWithInconsistentReturnsJS
-			return (SETTINGS.enableUserAvatars ? templateMessageWithAvatar : templateMessageNoAvatar).apply(message, (property, value) => {
+			return (settings.enableUserAvatars ? templateMessageWithAvatar : templateMessageNoAvatar).apply(message, (property, value) => {
 				if (property === "avatar") {
-					return value ? templateUserAvatar.apply(value) : "";
+					return value ? templateUserAvatar.apply(getAvatarUrlObject(value)) : "";
 				}
-				else if (property === "user.tag") {
-					return value ? value : "????";
+				else if (property === "user.displayName") {
+					return value ? value : message.user.name;
 				}
 				else if (property === "timestamp") {
-					return DOM.getHumanReadableTime(value);
+					return dom.getHumanReadableTime(value);
 				}
 				else if (property === "contents") {
 					return value && value.length > 0 ? processMessageContents(value) : "";
@@ -242,30 +268,32 @@ const DISCORD = (function() {
 					}
 					
 					return value.map(attachment => {
-						if (!DISCORD.isImageAttachment(attachment) || !SETTINGS.enableImagePreviews) {
-							return templateAttachmentDownload.apply(attachment);
+						const url = fileUrlProcessor(attachment.url);
+						
+						if (!discord.isImageAttachment(attachment) || !settings.enableImagePreviews) {
+							return templateAttachmentDownload.apply({ url, name: attachment.name });
 						}
 						else if ("width" in attachment && "height" in attachment) {
-							return templateEmbedImageWithSize.apply({ url: attachment.url, src: attachment.url, width: attachment.width, height: attachment.height });
+							return templateEmbedImageWithSize.apply({ url, src: url, width: attachment.width, height: attachment.height });
 						}
 						else {
-							return templateEmbedImage.apply({ url: attachment.url, src: attachment.url });
+							return templateEmbedImage.apply({ url, src: url });
 						}
 					}).join("");
 				}
 				else if (property === "edit") {
-					return value ? "<span class='info edited'>Edited " + DOM.getHumanReadableTime(value) + "</span>" : "";
+					return value ? "<span class='info edited'>Edited " + dom.getHumanReadableTime(value) + "</span>" : "";
 				}
 				else if (property === "jump") {
-					return STATE.hasActiveFilter ? "<span class='info jump' data-jump='" + value + "'>Jump to message</span>" : "";
+					return state.hasActiveFilter ? "<span class='info jump' data-jump='" + value + "'>Jump to message</span>" : "";
 				}
 				else if (property === "reply") {
 					if (!value) {
 						return value === null ? "<span class='reply-contents reply-missing'>(replies to an unknown message)</span>" : "";
 					}
 					
-					const user = "<span class='reply-username' title='#" + (value.user.tag ? value.user.tag : "????") + "'>" + value.user.name + "</span>";
-					const avatar = SETTINGS.enableUserAvatars && value.avatar ? "<span class='reply-avatar'>" + templateUserAvatar.apply(value.avatar) + "</span>" : "";
+					const user = "<span class='reply-username' title='" + value.user.name + "'>" + (value.user.displayName ?? value.user.name) + "</span>";
+					const avatar = settings.enableUserAvatars && value.avatar ? "<span class='reply-avatar'>" + templateUserAvatar.apply(getAvatarUrlObject(value.avatar)) + "</span>" : "";
 					const contents = value.contents ? "<span class='reply-contents'>" + processMessageContents(value.contents) + "</span>" : "";
 					
 					return "<span class='jump' data-jump='" + value.id + "'>Jump to reply</span><span class='user'>" + avatar + user + "</span>" + contents;
@@ -277,9 +305,10 @@ const DISCORD = (function() {
 					
 					return "<div class='reactions'>" + value.map(reaction => {
 						if ("id" in reaction){
-							// noinspection JSUnusedGlobalSymbols, JSUnresolvedVariable
-							reaction.ext = reaction.a && SETTINGS.enableAnimatedEmoji ? "gif" : "png";
-							return templateReactionCustom.apply(reaction);
+							const ext = reaction.a && settings.enableAnimatedEmoji ? "gif" : "webp";
+							const url = fileUrlProcessor("https://cdn.discordapp.com/emojis/" + reaction.id + "." + ext);
+							// noinspection JSUnusedGlobalSymbols
+							return templateReactionCustom.apply({ url, n: reaction.n, c: reaction.c });
 						}
 						else {
 							return templateReaction.apply(reaction);

app/Resources/Viewer/scripts/dom.mjs

@@ -8,9 +8,12 @@ const HTML_ENTITY_MAP = {
 
 const HTML_ENTITY_REGEX = /[&<>"']/g;
 
-class DOM {
+export default class {
 	/**
 	 * Returns a child element by its ID. Parent defaults to the entire document.
+	 * @param {string} id
+	 * @param {HTMLElement} [parent]
+	 * @returns {HTMLElement|null}
 	 */
 	static id(id, parent) {
 		return (parent || document).getElementById(id);
@@ -18,6 +21,9 @@ class DOM {
 	
 	/**
 	 * Returns an array of all child elements containing the specified class. Parent defaults to the entire document.
+	 * @param {string} cls
+	 * @param {HTMLElement} [parent]
+	 * @returns {HTMLElement[]}
 	 */
 	static cls(cls, parent) {
 		return Array.prototype.slice.call((parent || document).getElementsByClassName(cls));
@@ -25,6 +31,9 @@ class DOM {
 	
 	/**
 	 * Returns an array of all child elements that have the specified tag. Parent defaults to the entire document.
+	 * @param {string} tag
+	 * @param {HTMLElement} [parent]
+	 * @returns {HTMLElement[]}
 	 */
 	static tag(tag, parent) {
 		return Array.prototype.slice.call((parent || document).getElementsByTagName(tag));
@@ -32,6 +41,9 @@ class DOM {
 	
 	/**
 	 * Returns the first child element containing the specified class. Parent defaults to the entire document.
+	 * @param {string} cls
+	 * @param {HTMLElement} [parent]
+	 * @returns {HTMLElement}
 	 */
 	static fcls(cls, parent) {
 		return (parent || document).getElementsByClassName(cls)[0];

app/Resources/Viewer/scripts/gui.mjs

@@ -1,10 +1,16 @@
-const GUI = (function() {
+import dom from "./dom.mjs";
+import discord from "./discord.mjs";
+import settings from "./settings.mjs";
+import state from "./state.mjs";
+
+export default (function() {
 	let eventOnOptMessagesPerPageChanged;
 	let eventOnOptMessageFilterChanged;
 	let eventOnNavButtonClicked;
 	
 	const getActiveFilter = function() {
-		const active = DOM.fcls("active", DOM.id("opt-filter-list"));
+		/** @type HTMLSelectElement */
+		const active = dom.fcls("active", dom.id("opt-filter-list"));
 		
 		return active && active.value !== "" ? {
 			"type": active.getAttribute("data-filter-type"),
@@ -17,12 +23,12 @@ const GUI = (function() {
 	};
 	
 	const showModal = function(width, html) {
-		const dialog = DOM.id("dialog");
+		const dialog = dom.id("dialog");
 		dialog.innerHTML = html;
 		dialog.style.width = width + "px";
 		dialog.style.marginLeft = (-width / 2) + "px";
 		
-		DOM.id("modal").classList.add("visible");
+		dom.id("modal").classList.add("visible");
 		return dialog;
 	};
 	
@@ -38,9 +44,9 @@ const GUI = (function() {
 <label><input id='dht-cfg-animemoji' type='checkbox'> Animated Emoji</label><br>`);
 		
 		const setupCheckBox = function(id, settingName) {
-			const ele = DOM.id(id);
-			ele.checked = SETTINGS[settingName];
-			ele.addEventListener("change", () => SETTINGS[settingName] = ele.checked);
+			const ele = dom.id(id);
+			ele.checked = settings[settingName];
+			ele.addEventListener("change", () => settings[settingName] = ele.checked);
 		};
 		
 		setupCheckBox("dht-cfg-imgpreviews", "enableImagePreviews");
@@ -65,20 +71,20 @@ const GUI = (function() {
 		// ---------
 		
 		setup() {
-			const inputMessageFilter = DOM.id("opt-messages-filter");
-			const containerFilterList = DOM.id("opt-filter-list");
+			const inputMessageFilter = dom.id("opt-messages-filter");
+			const containerFilterList = dom.id("opt-filter-list");
 			
 			const resetActiveFilter = function() {
 				inputMessageFilter.value = "";
 				inputMessageFilter.dispatchEvent(new Event("change"));
 				
-				DOM.id("opt-filter-contents").value = "";
+				dom.id("opt-filter-contents").value = "";
 			};
 			
 			inputMessageFilter.value = ""; // required to prevent browsers from remembering old value
 			
 			inputMessageFilter.addEventListener("change", () => {
-				DOM.cls("active", containerFilterList).forEach(ele => ele.classList.remove("active"));
+				dom.cls("active", containerFilterList).forEach(ele => ele.classList.remove("active"));
 				
 				if (inputMessageFilter.value) {
 					containerFilterList.querySelector("[data-filter-type='" + inputMessageFilter.value + "']").classList.add("active");
@@ -91,11 +97,11 @@ const GUI = (function() {
 				ele.addEventListener(ele.tagName === "SELECT" ? "change" : "input", () => triggerFilterChanged());
 			});
 			
-			DOM.id("opt-messages-per-page").addEventListener("change", () => {
+			dom.id("opt-messages-per-page").addEventListener("change", () => {
 				eventOnOptMessagesPerPageChanged && eventOnOptMessagesPerPageChanged();
 			});
 			
-			DOM.tag("button", DOM.fcls("nav")).forEach(button => {
+			dom.tag("button", dom.fcls("nav")).forEach(button => {
 				button.disabled = true;
 				
 				button.addEventListener("click", () => {
@@ -103,34 +109,34 @@ const GUI = (function() {
 				});
 			});
 			
-			DOM.id("btn-settings").addEventListener("click", () => {
+			dom.id("btn-settings").addEventListener("click", () => {
 				showSettingsModal();
 			});
 			
-			DOM.id("btn-about").addEventListener("click", () => {
+			dom.id("btn-about").addEventListener("click", () => {
 				showInfoModal();
 			});
 			
-			DOM.id("messages").addEventListener("click", e => {
+			dom.id("messages").addEventListener("click", e => {
 				const jump = e.target.getAttribute("data-jump");
 				
 				if (jump) {
 					resetActiveFilter();
 					
-					const index = STATE.navigateToMessage(jump);
+					const index = state.navigateToMessage(jump);
 					
 					if (index === -1) {
 						alert("Message not found.");
 					}
 					else {
-						DOM.id("messages").children[index].scrollIntoView();
+						dom.id("messages").children[index].scrollIntoView();
 					}
 				}
 			});
 			
-			DOM.id("overlay").addEventListener("click", () => {
-				DOM.id("modal").classList.remove("visible");
-				DOM.id("dialog").innerHTML = "";
+			dom.id("overlay").addEventListener("click", () => {
+				dom.id("modal").classList.remove("visible");
+				dom.id("dialog").innerHTML = "";
 			});
 		},
 		
@@ -168,19 +174,19 @@ const GUI = (function() {
 		 */
 		getOptionMessagesPerPage() {
 			/** @type HTMLInputElement */
-			const messagesPerPage = DOM.id("opt-messages-per-page");
+			const messagesPerPage = dom.id("opt-messages-per-page");
 			return parseInt(messagesPerPage.value, 10);
 		},
 		
 		updateNavigation(currentPage, totalPages) {
-			DOM.id("nav-page-current").innerHTML = currentPage;
-			DOM.id("nav-page-total").innerHTML = totalPages || "?";
+			dom.id("nav-page-current").innerHTML = currentPage;
+			dom.id("nav-page-total").innerHTML = totalPages || "?";
 			
-			DOM.id("nav-first").disabled = currentPage === 1;
-			DOM.id("nav-prev").disabled = currentPage === 1;
-			DOM.id("nav-pick").disabled = (totalPages || 0) <= 1;
-			DOM.id("nav-next").disabled = currentPage === (totalPages || 1);
-			DOM.id("nav-last").disabled = currentPage === (totalPages || 1);
+			dom.id("nav-first").disabled = currentPage === 1;
+			dom.id("nav-prev").disabled = currentPage === 1;
+			dom.id("nav-pick").disabled = (totalPages || 0) <= 1;
+			dom.id("nav-next").disabled = currentPage === (totalPages || 1);
+			dom.id("nav-last").disabled = currentPage === (totalPages || 1);
 		},
 		
 		// --------------
@@ -191,7 +197,7 @@ const GUI = (function() {
 		 * Updates the channel list and sets up their click events. The callback is triggered whenever a channel is selected, and takes the channel ID as its argument.
 		 */
 		updateChannelList(channels, selected, callback) {
-			const eleChannels = DOM.id("channels");
+			const eleChannels = dom.id("channels");
 			
 			if (!channels) {
 				eleChannels.innerHTML = "";
@@ -201,11 +207,11 @@ const GUI = (function() {
 					channels = channels.filter(channel => channel.msgcount > 0);
 				}
 				
-				eleChannels.innerHTML = channels.map(channel => DISCORD.getChannelHTML(channel)).join("");
+				eleChannels.innerHTML = channels.map(channel => discord.getChannelHTML(channel)).join("");
 				
 				Array.prototype.forEach.call(eleChannels.children, ele => {
 					ele.addEventListener("click", () => {
-						const currentChannel = DOM.fcls("active", eleChannels);
+						const currentChannel = dom.fcls("active", eleChannels);
 						
 						if (currentChannel) {
 							currentChannel.classList.remove("active");
@@ -224,12 +230,12 @@ const GUI = (function() {
 		},
 		
 		updateMessageList(messages) {
-			DOM.id("messages").innerHTML = messages ? messages.map(message => DISCORD.getMessageHTML(message)).join("") : "";
+			dom.id("messages").innerHTML = messages ? messages.map(message => discord.getMessageHTML(message)).join("") : "";
 		},
 		
 		updateUserList(users) {
 			/** @type HTMLSelectElement */
-			const eleSelect = DOM.id("opt-filter-user");
+			const eleSelect = dom.id("opt-filter-user");
 			
 			while (eleSelect.length > 1) {
 				eleSelect.remove(1);
@@ -237,10 +243,11 @@ const GUI = (function() {
 			
 			const options = [];
 			
-			for (const key of Object.keys(users)) {
+			for (const id of Object.keys(users)) {
+				const user = users[id];
 				const option = document.createElement("option");
-				option.value = key;
-				option.text = users[key].name;
+				option.value = id;
+				option.text = user.displayName ? `${user.displayName} (${user.name})` : user.name;
 				options.push(option);
 			}
 			
@@ -249,7 +256,7 @@ const GUI = (function() {
 		},
 		
 		scrollMessagesToTop() {
-			DOM.id("messages").scrollTop = 0;
+			dom.id("messages").scrollTop = 0;
 		}
 	};
 })();

app/Resources/Viewer/scripts/polyfills.mjs

@@ -0,0 +1,35 @@
+// https://gist.github.com/MattiasBuelens/496fc1d37adb50a733edd43853f2f60e/088f061ab79b296f29225467ae9ba86ff990195d
+
+ReadableStream.prototype.values ??= function({ preventCancel = false } = {}) {
+	const reader = this.getReader();
+	return {
+		async next() {
+			try {
+				const result = await reader.read();
+				if (result.done) {
+					reader.releaseLock();
+				}
+				return result;
+			} catch (e) {
+				reader.releaseLock();
+				throw e;
+			}
+		},
+		async return(value) {
+			if (!preventCancel) {
+				const cancelPromise = reader.cancel(value);
+				reader.releaseLock();
+				await cancelPromise;
+			}
+			else {
+				reader.releaseLock();
+			}
+			return { done: true, value };
+		},
+		[Symbol.asyncIterator]() {
+			return this;
+		}
+	};
+};
+
+ReadableStream.prototype[Symbol.asyncIterator] ??= ReadableStream.prototype.values;

app/Resources/Viewer/scripts/processor.mjs

@@ -1,16 +1,16 @@
-const PROCESSOR = {};
+import discord from "./discord.mjs";
 
 // ------------------------
 // Global filter generators
 // ------------------------
 
-PROCESSOR.FILTER = {
-	byUser: ((userindex) => message => message.u === userindex),
+const filter = {
+	byUser: ((user) => message => message.u === user),
 	byTime: ((timeStart, timeEnd) => message => message.t >= timeStart && message.t <= timeEnd),
 	byContents: ((substr) => message => ("m" in message ? message.m : "").indexOf(substr) !== -1),
 	byRegex: ((regex) => message => regex.test("m" in message ? message.m : "")),
-	withImages: (() => message => (message.e && message.e.some(embed => embed.type === "image")) || (message.a && message.a.some(DISCORD.isImageAttachment))),
-	withDownloads: (() => message => message.a && message.a.some(attachment => !DISCORD.isImageAttachment(attachment))),
+	withImages: (() => message => (message.e && message.e.some(embed => embed.type === "image")) || (message.a && message.a.some(discord.isImageAttachment))),
+	withDownloads: (() => message => message.a && message.a.some(attachment => !discord.isImageAttachment(attachment))),
 	withEmbeds: (() => message => message.e && message.e.length > 0),
 	withAttachments: (() => message => message.a && message.a.length > 0),
 	isEdited: (() => message => ("te" in message) ? message.te : (message.f & 1) === 1)
@@ -20,7 +20,7 @@ PROCESSOR.FILTER = {
 // Global sorters
 // --------------
 
-PROCESSOR.SORTER = {
+const sorter = {
 	oldestToNewest: (key1, key2) => {
 		if (key1.length === key2.length) {
 			return key1 > key2 ? 1 : key1 < key2 ? -1 : 0;
@@ -39,3 +39,8 @@ PROCESSOR.SORTER = {
 		}
 	}
 };
+
+export default {
+	FILTER: filter,
+	SORTER: sorter
+};

app/Resources/Viewer/scripts/settings.mjs

@@ -1,4 +1,4 @@
-const SETTINGS = (function() {
+export default (function() {
 	/**
 	 * @type {{}}
 	 * @property {Function} onSettingsChanged

app/Resources/Viewer/scripts/state.mjs

@@ -1,10 +1,12 @@
+import settings from "./settings.mjs";
+import processor from "./processor.mjs";
+
 // noinspection FunctionWithInconsistentReturnsJS
-const STATE = (function() {
+export default (function() {
 	/**
 	 * @type {{}}
 	 * @property {{}} users
-	 * @property {String[]} userindex
-	 * @property {{}[]} servers
+	 * @property {{}} servers
 	 * @property {{}} channels
 	 */
 	let loadedFileMeta;
@@ -17,20 +19,16 @@ const STATE = (function() {
 	let currentPage;
 	let messagesPerPage;
 	
-	const getUser = function(index) {
-		return loadedFileMeta.users[loadedFileMeta.userindex[index]] || { "name": "<unknown>" };
-	};
-	
-	const getUserId = function(index) {
-		return loadedFileMeta.userindex[index];
+	const getUser = function(id) {
+		return loadedFileMeta.users[id] || { "name": "<unknown>" };
 	};
 	
 	const getUserList = function() {
 		return loadedFileMeta ? loadedFileMeta.users : [];
 	};
 	
-	const getServer = function(index) {
-		return loadedFileMeta.servers[index] || { "name": "<unknown>", "type": "unknown" };
+	const getServer = function(id) {
+		return loadedFileMeta.servers[id] || { "name": "<unknown>", "type": "unknown" };
 	};
 	
 	const generateChannelHierarchy = function() {
@@ -173,7 +171,7 @@ const STATE = (function() {
 	};
 	
 	const getMessageChannel = function(id) {
-		for (const [ channel, messages ] of Object.entries(loadedFileData)) {
+		for (const [ channel, messages ] of Object.entries(loadedFileData)) { 
 			if (id in messages) {
 				return channel;
 			}
@@ -204,7 +202,7 @@ const STATE = (function() {
 			 */
 			const message = messages[key];
 			const user = getUser(message.u);
-			const avatar = user.avatar ? { id: getUserId(message.u), path: user.avatar } : null;
+			const avatar = user.avatar ? { id: message.u, path: user.avatar } : null;
 			
 			const obj = {
 				user,
@@ -232,7 +230,7 @@ const STATE = (function() {
 			if ("r" in message) {
 				const replyMessage = getMessageById(message.r);
 				const replyUser = replyMessage ? getUser(replyMessage.u) : null;
-				const replyAvatar = replyUser && replyUser.avatar ? { id: getUserId(replyMessage.u), path: replyUser.avatar } : null;
+				const replyAvatar = replyUser && replyUser.avatar ? { id: replyMessage.u, path: replyUser.avatar } : null;
 				
 				obj["reply"] = replyMessage ? {
 					"id": message.r,
@@ -290,20 +288,17 @@ const STATE = (function() {
 			eventOnUsersRefreshed = callback;
 		},
 		
-		/**
-		 * @param {{ meta, data }} file
-		 */
-		uploadFile(file) {
+		uploadFile(meta, data) {
 			if (loadedFileMeta != null) {
 				throw "A file is already loaded!";
 			}
 			
-			if (!file || typeof file.meta !== "object" || typeof file.data !== "object") {
+			if (typeof meta !== "object" || typeof data !== "object") {
 				throw "Invalid file format!";
 			}
 			
-			loadedFileMeta = file.meta;
-			loadedFileData = file.data;
+			loadedFileMeta = meta;
+			loadedFileData = data;
 			loadedMessages = null;
 			
 			selectedChannel = null;
@@ -313,7 +308,7 @@ const STATE = (function() {
 			triggerChannelsRefreshed();
 			triggerMessagesRefreshed();
 			
-			SETTINGS.onSettingsChanged(() => triggerMessagesRefreshed());
+			settings.onSettingsChanged(() => triggerMessagesRefreshed());
 		},
 		
 		getChannelName(channel) {
@@ -321,21 +316,21 @@ const STATE = (function() {
 			return (channelObj && channelObj.name) || channel;
 		},
 		
-		getUserTag(user) {
-			const userObj = loadedFileMeta.users[user];
-			return (userObj && userObj.tag) || "????";
-		},
-		
 		getUserName(user) {
 			const userObj = loadedFileMeta.users[user];
 			return (userObj && userObj.name) || user;
 		},
 		
+		getUserDisplayName(user) {
+			const userObj = loadedFileMeta.users[user];
+			return (userObj && (userObj.displayName || userObj.name)) || user;
+		},
+		
 		selectChannel(channel) {
 			currentPage = 1;
 			selectedChannel = channel;
 			
-			loadedMessages = getFilteredMessageKeys(channel).sort(PROCESSOR.SORTER.oldestToNewest);
+			loadedMessages = getFilteredMessageKeys(channel).sort(processor.SORTER.oldestToNewest);
 			triggerMessagesRefreshed();
 		},
 		
@@ -416,23 +411,23 @@ const STATE = (function() {
 		setActiveFilter(filter) {
 			switch (filter ? filter.type : "") {
 				case "user":
-					filterFunction = PROCESSOR.FILTER.byUser(loadedFileMeta.userindex.indexOf(filter.value));
+					filterFunction = processor.FILTER.byUser(filter.value);
 					break;
 				
 				case "contents":
-					filterFunction = PROCESSOR.FILTER.byContents(filter.value);
+					filterFunction = processor.FILTER.byContents(filter.value);
 					break;
 				
 				case "withimages":
-					filterFunction = PROCESSOR.FILTER.withImages();
+					filterFunction = processor.FILTER.withImages();
 					break;
 				
 				case "withdownloads":
-					filterFunction = PROCESSOR.FILTER.withDownloads();
+					filterFunction = processor.FILTER.withDownloads();
 					break;
 				
 				case "edited":
-					filterFunction = PROCESSOR.FILTER.isEdited();
+					filterFunction = processor.FILTER.isEdited();
 					break;
 				
 				default:

app/Resources/Viewer/scripts/template.mjs

@@ -1,6 +1,8 @@
+import dom from "./dom.mjs";
+
 const TEMPLATE_REGEX = /{([^{}]+?)}/g;
 
-class TEMPLATE {
+export default class {
 	constructor(contents) {
 		this.contents = contents;
 	};
@@ -11,10 +13,10 @@ class TEMPLATE {
 			
 			if (processor) {
 				const updated = processor(match, value);
-				return typeof updated === "undefined" ? DOM.escapeHTML(value) : updated;
+				return typeof updated === "undefined" ? dom.escapeHTML(value) : updated;
 			}
 			
-			return DOM.escapeHTML(value);
+			return dom.escapeHTML(value);
 		});
 	}
 }

app/Resources/Viewer/styles/channels.css

@@ -3,18 +3,24 @@
   min-width: 215px;
   max-width: 300px;
   overflow-y: auto;
+  color: #eee;
   background-color: #1c1e22;
+  font-size: 15px;
 }
 
-#channels > div {
+#channels > div.loading {
+  margin: 0 auto;
+  width: 150px;
+  height: 150px;
+}
+
+#channels > div.channel {
   cursor: pointer;
   padding: 10px 12px;
-  color: #eee;
-  font-size: 15px;
   border-bottom: 1px solid #333333;
 }
 
-#channels > div:hover, #channels > div.active {
+#channels > div.channel:hover, #channels > div.channel.active {
   background-color: #282b30;
 }
 

app/Resources/Viewer/styles/main.css

@@ -11,3 +11,20 @@ body {
   display: flex;
   flex-direction: row;
 }
+
+.loading {
+  position: relative;
+  --loading-backdrop: rgba(0, 0, 0, 0);
+}
+
+.loading::after {
+  content: "";
+  background: var(--loading-backdrop)
+  url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 300 300' preserveAspectRatio='xMidYMid'%3E %3Ccircle cx='150' cy='150' fill='none' stroke='%237983f5' stroke-width='8' r='42' stroke-dasharray='198 68'%3E %3CanimateTransform attributeName='transform' type='rotate' repeatCount='indefinite' dur='1.25s' values='0 150 150;360 150 150' keyTimes='0;1' /%3E %3C/circle%3E %3C/svg%3E")
+  no-repeat center center;
+  position: absolute;
+  top: 0;
+  left: 0;
+  width: 100%;
+  height: 100%;
+}

app/Resources/Viewer/styles/menu.css

@@ -1,15 +1,16 @@
 #menu {
-  width: 100%;
-  height: 48px;
   display: flex;
   flex-direction: row;
+  align-items: stretch;
+  gap: 8px;
+  padding: 8px;
   background-color: #17181c;
   border-bottom: 1px dotted #5d626b;
 }
 
 #menu .splitter {
-  width: 1px;
-  margin: 9px 4px;
+  flex: 0 0 1px;
+  margin: 9px 1px;
   background-color: #5d626b;
 }
 
@@ -23,7 +24,8 @@
 }
 
 #menu button, #menu select, #menu input[type="text"] {
-  margin: 8px;
+  height: 31px;
+  padding: 0 10px;
   background-color: #7289da;
   color: #fff;
   text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.75);
@@ -31,28 +33,25 @@
 
 #menu button {
   font-size: 17px;
-  padding: 0 12px;
   border: 0;
   cursor: pointer;
+  white-space: nowrap;
 }
 
 #menu select {
   font-size: 14px;
-  padding: 6px;
   border: 0;
   cursor: pointer;
 }
 
 #menu input[type="text"] {
   font-size: 14px;
-  padding: 7px 12px;
   border: 0;
 }
 
 #menu .nav {
   display: flex;
   flex-direction: row;
-  margin: 0 8px;
 }
 
 #menu .nav > button {
@@ -66,7 +65,7 @@
 }
 
 #menu .nav > button, #menu .nav > p {
-  margin: 8px 1px;
+  margin: 0 1px;
 }
 
 #opt-filter-list > select, #opt-filter-list > input {
@@ -76,3 +75,7 @@
 #opt-filter-list > .active {
   display: block;
 }
+
+#btn-about {
+  margin-left: auto;
+}

app/Resources/Viewer/styles/messages.css

@@ -107,23 +107,11 @@
 }
 
 .message .thumbnail {
-  position: relative;
+  --loading-backdrop: rgba(0, 0, 0, 0.75);
   max-width: calc(100% - 20px);
   max-height: 320px;
 }
 
-.message .thumbnail.loading::after {
-  content: "";
-  background: rgba(0, 0, 0, 0.75)
-              url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 300 300' preserveAspectRatio='xMidYMid'%3E %3Ccircle cx='150' cy='150' fill='none' stroke='%237983f5' stroke-width='8' r='42' stroke-dasharray='198 68'%3E %3CanimateTransform attributeName='transform' type='rotate' repeatCount='indefinite' dur='1.25s' values='0 150 150;360 150 150' keyTimes='0;1' /%3E %3C/circle%3E %3C/svg%3E")
-              no-repeat center center;
-  position: absolute;
-  top: 0;
-  left: 0;
-  width: 100%;
-  height: 100%;
-}
-
 .message .thumbnail img {
   width: auto;
   max-width: 100%;

app/Server/Data/Aggregations/DownloadStatusStatistics.cs

@@ -1,15 +1,19 @@
 namespace DHT.Server.Data.Aggregations;
 
 public sealed class DownloadStatusStatistics {
-	public int EnqueuedCount { get; internal set; }
-	public ulong EnqueuedSize { get; internal set; }
+	public int PendingCount { get; internal init; }
+	public ulong PendingTotalSize { get; internal init; }
+	public int PendingWithUnknownSizeCount { get; internal init; }
 
-	public int SuccessfulCount { get; internal set; }
-	public ulong SuccessfulSize { get; internal set; }
+	public int SuccessfulCount { get; internal init; }
+	public ulong SuccessfulTotalSize { get; internal init; }
+	public int SuccessfulWithUnknownSizeCount { get; internal init; }
 
-	public int FailedCount { get; internal set; }
-	public ulong FailedSize { get; internal set; }
-
-	public int SkippedCount { get; internal set; }
-	public ulong SkippedSize { get; internal set; }
+	public int FailedCount { get; internal init; }
+	public ulong FailedTotalSize { get; internal init; }
+	public int FailedWithUnknownSizeCount { get; internal init; }
+	
+	public int SkippedCount { get; internal init; }
+	public ulong SkippedTotalSize { get; internal init; }
+	public int SkippedWithUnknownSizeCount { get; internal init; }
 }

app/Server/Data/Download.cs

@@ -1,33 +1,17 @@
-using System;
-using System.Net;
-using DHT.Server.Download;
-
 namespace DHT.Server.Data;
 
-public readonly struct Download {
-	internal static Download NewSuccess(DownloadItem item, byte[] data) {
-		return new Download(item.NormalizedUrl, item.DownloadUrl, DownloadStatus.Success, (ulong) Math.Max(data.LongLength, 0), data);
-	}
-
-	internal static Download NewFailure(DownloadItem item, HttpStatusCode? statusCode, ulong size) {
-		return new Download(item.NormalizedUrl, item.DownloadUrl, statusCode.HasValue ? (DownloadStatus) (int) statusCode : DownloadStatus.GenericError, size);
-	}
-
+public sealed class Download {
 	public string NormalizedUrl { get; }
 	public string DownloadUrl { get; }
 	public DownloadStatus Status { get; }
-	public ulong Size { get; }
-	public byte[]? Data { get; }
+	public string? Type { get; }
+	public ulong? Size { get; }
 
-	internal Download(string normalizedUrl, string downloadUrl, DownloadStatus status, ulong size, byte[]? data = null) {
+	internal Download(string normalizedUrl, string downloadUrl, DownloadStatus status, string? type, ulong? size) {
 		NormalizedUrl = normalizedUrl;
 		DownloadUrl = downloadUrl;
 		Status = status;
+		Type = type;
 		Size = size;
-		Data = data;
-	}
-
-	internal Download WithData(byte[] data) {
-		return new Download(NormalizedUrl, DownloadUrl, Status, Size, data);
 	}
 }

app/Server/Data/DownloadStatus.cs

@@ -6,8 +6,9 @@ namespace DHT.Server.Data;
 /// Extends <see cref="HttpStatusCode"/> with custom status codes in the range 0-99.
 /// </summary>
 public enum DownloadStatus {
-	Enqueued = 0,
+	Pending = 0,
 	GenericError = 1,
 	Downloading = 2,
+	LastCustomCode = 99,
 	Success = HttpStatusCode.OK
 }

app/Server/Data/DownloadedAttachment.cs

@@ -1,6 +0,0 @@
-namespace DHT.Server.Data;
-
-public readonly struct DownloadedAttachment {
-	public string? Type { get; internal init; }
-	public byte[] Data { get; internal init; }
-}

app/Server/Data/Embeds/DiscordEmbedJson.cs

@@ -0,0 +1,17 @@
+namespace DHT.Server.Data.Embeds;
+
+sealed class DiscordEmbedJson {
+	public string? Type { get; set; }
+	public string? Url { get; set; }
+	
+	public JsonImage? Image { get; set; }
+	public JsonImage? Thumbnail { get; set; }
+	public JsonImage? Video { get; set; }
+
+	public sealed class JsonImage {
+		public string? Url { get; set; }
+		public string? ProxyUrl { get; set; }
+		public int? Width { get; set; }
+		public int? Height { get; set; }
+	}
+}

app/Server/Data/Embeds/DiscordEmbedJsonContext.cs

@@ -0,0 +1,7 @@
+using System.Text.Json.Serialization;
+
+namespace DHT.Server.Data.Embeds;
+
+[JsonSourceGenerationOptions(PropertyNamingPolicy = JsonKnownNamingPolicy.SnakeCaseLower, GenerationMode = JsonSourceGenerationMode.Default)]
+[JsonSerializable(typeof(DiscordEmbedJson))]
+sealed partial class DiscordEmbedJsonContext : JsonSerializerContext;

app/Server/Data/Filters/AttachmentFilter.cs

@@ -1,15 +0,0 @@
-namespace DHT.Server.Data.Filters;
-
-public sealed class AttachmentFilter {
-	public ulong? MaxBytes { get; set; } = null;
-
-	public DownloadItemRules? DownloadItemRule { get; set; } = null;
-
-	public bool IsEmpty => MaxBytes == null &&
-	                       DownloadItemRule == null;
-
-	public enum DownloadItemRules {
-		OnlyNotPresent,
-		OnlyPresent
-	}
-}

app/Server/Data/Filters/DownloadItemFilter.cs

@@ -3,8 +3,10 @@ using System.Collections.Generic;
 namespace DHT.Server.Data.Filters;
 
 public sealed class DownloadItemFilter {
-	public HashSet<DownloadStatus>? IncludeStatuses { get; init; } = null;
-	public HashSet<DownloadStatus>? ExcludeStatuses { get; init; } = null;
+	public HashSet<DownloadStatus>? IncludeStatuses { get; set; } = null;
+	public HashSet<DownloadStatus>? ExcludeStatuses { get; set; } = null;
+	
+	public ulong? MaxBytes { get; set; } = null;
 
-	public bool IsEmpty => IncludeStatuses == null && ExcludeStatuses == null;
+	public bool IsEmpty => IncludeStatuses == null && ExcludeStatuses == null && MaxBytes == null;
 }

app/Server/Data/Settings/SettingsKey.cs

@@ -0,0 +1,60 @@
+using System.Diagnostics.CodeAnalysis;
+
+namespace DHT.Server.Data.Settings;
+
+public static class SettingsKey {
+	public static Bool DownloadsAutoStart { get; } = new ("downloads_auto_start");
+	public static Bool DownloadsLimitSize { get; } = new ("downloads_limit_size");
+	public static UnsignedLong DownloadsMaximumSize { get; } = new ("downloads_maximum_size");
+	public static String DownloadsMaximumSizeUnit { get; } = new ("downloads_maximum_size_unit");
+
+	public sealed class String(string key) : SettingsKey<string>(key) {
+		internal override bool FromString(string value, out string result) {
+			result = value;
+			return true;
+		}
+
+		internal override string ToString(string value) {
+			return value;
+		}
+	}
+	
+	public sealed class Bool(string key) : SettingsKey<bool>(key) {
+		internal override bool FromString(string value, out bool result) {
+			switch (value) {
+				case "1":
+					result = true;
+					return true;
+
+				case "0":
+					result = false;
+					return true;
+
+				default:
+					result = false;
+					return false;
+			}
+		}
+
+		internal override string ToString(bool value) {
+			return value ? "1" : "0";
+		}
+	}
+	
+	public sealed class UnsignedLong(string key) : SettingsKey<ulong>(key) {
+		internal override bool FromString(string value, out ulong result) {
+			return ulong.TryParse(value, out result);
+		}
+
+		internal override string ToString(ulong value) {
+			return value.ToString();
+		}
+	}
+}
+
+public abstract class SettingsKey<T>(string key) {
+	internal string Key => key;
+
+	internal abstract bool FromString(string value, [NotNullWhen(true)] out T result);
+	internal abstract string ToString(T value);
+}

app/Server/Data/User.cs

@@ -3,6 +3,7 @@ namespace DHT.Server.Data;
 public readonly struct User {
 	public ulong Id { get; init; }
 	public string Name { get; init; }
+	public string? DisplayName { get; init; }
 	public string? AvatarUrl { get; init; }
 	public string? Discriminator { get; init; }
 }

app/Server/Database/DatabaseExtensions.cs

@@ -25,8 +25,10 @@ public static class DatabaseExtensions {
 		
 		await target.Messages.Add(batchedMessages);
 
-		await foreach (var download in source.Downloads.GetWithoutData()) {
-			await target.Downloads.AddDownload(download.Status == DownloadStatus.Success ? await source.Downloads.HydrateWithData(download) : download);
+		await foreach (var download in source.Downloads.Get()) {
+			if (download.Status != DownloadStatus.Success || !await source.Downloads.GetDownloadData(download.NormalizedUrl, stream => target.Downloads.AddDownload(download, stream))) {
+				await target.Downloads.AddDownload(download, stream: null);
+			}
 		}
 	}
 }

app/Server/Database/DatabaseStatistics.cs

@@ -1,46 +0,0 @@
-using DHT.Utils.Models;
-
-namespace DHT.Server.Database;
-
-/// <summary>
-/// A live view of database statistics.
-/// Some of the totals are computed asynchronously and may not reflect the most recent version of the database, or may not be available at all until computed for the first time.
-/// </summary>
-public sealed class DatabaseStatistics : BaseModel {
-	private long totalServers;
-	private long totalChannels;
-	private long totalUsers;
-	private long? totalMessages;
-	private long? totalAttachments;
-	private long? totalDownloads;
-
-	public long TotalServers {
-		get => totalServers;
-		internal set => Change(ref totalServers, value);
-	}
-
-	public long TotalChannels {
-		get => totalChannels;
-		internal set => Change(ref totalChannels, value);
-	}
-
-	public long TotalUsers {
-		get => totalUsers;
-		internal set => Change(ref totalUsers, value);
-	}
-
-	public long? TotalMessages {
-		get => totalMessages;
-		internal set => Change(ref totalMessages, value);
-	}
-
-	public long? TotalAttachments {
-		get => totalAttachments;
-		internal set => Change(ref totalAttachments, value);
-	}
-
-	public long? TotalDownloads {
-		get => totalDownloads;
-		internal set => Change(ref totalDownloads, value);
-	}
-}

app/Server/Database/DatabaseStatisticsSnapshot.cs

@@ -1,11 +0,0 @@
-namespace DHT.Server.Database;
-
-/// <summary>
-/// A complete snapshot of database statistics at a particular point in time.
-/// </summary>
-public readonly struct DatabaseStatisticsSnapshot {
-	public long TotalServers { get; internal init; }
-	public long TotalChannels { get; internal init; }
-	public long TotalUsers { get; internal init; }
-	public long TotalMessages { get; internal init; }
-}

app/Server/Database/DummyDatabaseFile.cs

@@ -9,8 +9,8 @@ sealed class DummyDatabaseFile : IDatabaseFile {
 	public static DummyDatabaseFile Instance { get; } = new ();
 
 	public string Path => "";
-	public DatabaseStatistics Statistics { get; } = new ();
 	
+	public ISettingsRepository Settings { get; } = new ISettingsRepository.Dummy();
 	public IUserRepository Users { get; } = new IUserRepository.Dummy();
 	public IServerRepository Servers { get; } = new IServerRepository.Dummy();
 	public IChannelRepository Channels { get; } = new IChannelRepository.Dummy();
@@ -19,13 +19,11 @@ sealed class DummyDatabaseFile : IDatabaseFile {
 	
 	private DummyDatabaseFile() {}
 
-	public Task<DatabaseStatisticsSnapshot> SnapshotStatistics() {
-		return Task.FromResult(new DatabaseStatisticsSnapshot());
-	}
-
 	public Task Vacuum() {
 		return Task.CompletedTask;
 	}
 
-	public void Dispose() {}
+	public ValueTask DisposeAsync() {
+		return ValueTask.CompletedTask;
+	}
 }

app/Server/Database/Exceptions/DatabaseTooNewException.cs

@@ -5,9 +5,9 @@ namespace DHT.Server.Database.Exceptions;
 
 public sealed class DatabaseTooNewException : Exception {
 	public int DatabaseVersion { get; }
-	public int CurrentVersion => Schema.Version;
+	public int CurrentVersion => SqliteSchema.Version;
 
-	internal DatabaseTooNewException(int databaseVersion) : base("Database is too new: " + databaseVersion + " > " + Schema.Version) {
+	internal DatabaseTooNewException(int databaseVersion) : base("Database is too new: " + databaseVersion + " > " + SqliteSchema.Version) {
 		this.DatabaseVersion = databaseVersion;
 	}
 }

app/Server/Database/Export/Snowflake.cs

@@ -1,3 +1,5 @@
 namespace DHT.Server.Database.Export;
 
-readonly record struct Snowflake(ulong Id);
+readonly record struct Snowflake(ulong Id) {
+	public static implicit operator Snowflake(ulong id) => new (id);
+}

app/Server/Database/Export/Strategy/IViewerExportStrategy.cs

@@ -1,7 +0,0 @@
-using DHT.Server.Data;
-
-namespace DHT.Server.Database.Export.Strategy;
-
-public interface IViewerExportStrategy {
-	string GetAttachmentUrl(Attachment attachment);
-}

app/Server/Database/Export/Strategy/LiveViewerExportStrategy.cs

@@ -1,18 +0,0 @@
-using System.Net;
-using DHT.Server.Data;
-
-namespace DHT.Server.Database.Export.Strategy;
-
-public sealed class LiveViewerExportStrategy : IViewerExportStrategy {
-	private readonly string safePort;
-	private readonly string safeToken;
-
-	public LiveViewerExportStrategy(ushort port, string token) {
-		this.safePort = port.ToString();
-		this.safeToken = WebUtility.UrlEncode(token);
-	}
-
-	public string GetAttachmentUrl(Attachment attachment) {
-		return "http://127.0.0.1:" + safePort + "/get-attachment/" + WebUtility.UrlEncode(attachment.NormalizedUrl) + "?token=" + safeToken;
-	}
-}

app/Server/Database/Export/Strategy/StandaloneViewerExportStrategy.cs

@@ -1,18 +0,0 @@
-using DHT.Server.Data;
-
-namespace DHT.Server.Database.Export.Strategy;
-
-public sealed class StandaloneViewerExportStrategy : IViewerExportStrategy {
-	public static StandaloneViewerExportStrategy Instance { get; } = new ();
-
-	private StandaloneViewerExportStrategy() {}
-
-	public string GetAttachmentUrl(Attachment attachment) {
-		// The normalized URL will not load files from Discord CDN once the time limit is enforced.
-		
-		// The downloaded URL would work, but only for a limited time, so it is better for the links to not work
-		// rather than give users a false sense of security.
-		
-		return attachment.NormalizedUrl;
-	}
-}

app/Server/Database/Export/ViewerJson.cs

@@ -3,14 +3,10 @@ using System.Text.Json.Serialization;
 
 namespace DHT.Server.Database.Export;
 
-sealed class ViewerJson {
-	public required JsonMeta Meta { get; init; }
-	public required Dictionary<Snowflake, Dictionary<Snowflake, JsonMessage>> Data { get; init; }
-
+static class ViewerJson {
 	public sealed class JsonMeta {
 		public required Dictionary<Snowflake, JsonUser> Users { get; init; }
-		public required List<Snowflake> Userindex { get; init; }
-		public required List<JsonServer> Servers { get; init; }
+		public required Dictionary<Snowflake, JsonServer> Servers { get; init; }
 		public required Dictionary<Snowflake, JsonChannel> Channels { get; init; }
 	}
 	
@@ -18,10 +14,10 @@ sealed class ViewerJson {
 		public required string Name { get; init; }
 		
 		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
-		public string? Avatar { get; init; }
+		public string? DisplayName { get; init; }
 		
 		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
-		public string? Tag { get; init; }
+		public string? Avatar { get; init; }
 	}
 
 	public sealed class JsonServer {
@@ -30,7 +26,7 @@ sealed class ViewerJson {
 	}
 
 	public sealed class JsonChannel {
-		public required int Server { get; init; }
+		public required Snowflake Server { get; init; }
 		public required string Name { get; init; }
 		
 		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
@@ -47,7 +43,9 @@ sealed class ViewerJson {
 	}
 
 	public sealed class JsonMessage {
-		public required int U { get; init; }
+		public required Snowflake Id { get; init; }
+		public required Snowflake C { get; init; }
+		public required Snowflake U { get; init; }
 		public required long T { get; init; }
 
 		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]

app/Server/Database/Export/ViewerJsonExport.cs

@@ -2,118 +2,103 @@ using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Linq;
+using System.Runtime.CompilerServices;
 using System.Text.Json;
+using System.Threading;
 using System.Threading.Tasks;
 using DHT.Server.Data;
 using DHT.Server.Data.Filters;
-using DHT.Server.Database.Export.Strategy;
 using DHT.Utils.Logging;
 
 namespace DHT.Server.Database.Export;
 
-public static class ViewerJsonExport {
+static class ViewerJsonExport {
 	private static readonly Log Log = Log.ForType(typeof(ViewerJsonExport));
 
-	public static async Task Generate(Stream stream, IViewerExportStrategy strategy, IDatabaseFile db, MessageFilter? filter = null) {
+	public static async Task GetMetadata(Stream stream, IDatabaseFile db, MessageFilter? filter = null, CancellationToken cancellationToken = default) {
 		var perf = Log.Start();
 
-		var includedUserIds = new HashSet<ulong>();
-		var includedChannelIds = new HashSet<ulong>();
+		var includedChannels = new List<Channel>();
 		var includedServerIds = new HashSet<ulong>();
 
-		var includedMessages = await db.Messages.Get(filter).ToListAsync();
-		var includedChannels = new List<Channel>();
+		var channelIdFilter = filter?.ChannelIds;
 
-		foreach (var message in includedMessages) {
-			includedUserIds.Add(message.Sender);
-			includedChannelIds.Add(message.Channel);
-		}
-
-		await foreach (var channel in db.Channels.Get()) {
-			if (includedChannelIds.Contains(channel.Id)) {
+		await foreach (var channel in db.Channels.Get(cancellationToken)) {
+			if (channelIdFilter == null || channelIdFilter.Contains(channel.Id)) {
 				includedChannels.Add(channel);
 				includedServerIds.Add(channel.Server);
 			}
 		}
 
-		var (users, userIndex, userIndices) = await GenerateUserList(db, includedUserIds);
-		var (servers, serverIndices) = await GenerateServerList(db, includedServerIds);
-		var channels = GenerateChannelList(includedChannels, serverIndices);
+		var users = await GenerateUserList(db, cancellationToken);
+		var servers = await GenerateServerList(db, includedServerIds, cancellationToken);
+		var channels = GenerateChannelList(includedChannels);
+
+		var meta = new ViewerJson.JsonMeta {
+			Users = users,
+			Servers = servers,
+			Channels = channels
+		};
 
 		perf.Step("Collect database data");
 
-		var value = new ViewerJson {
-			Meta = new ViewerJson.JsonMeta {
-				Users = users,
-				Userindex = userIndex,
-				Servers = servers,
-				Channels = channels
-			},
-			Data = GenerateMessageList(includedMessages, userIndices, strategy)
-		};
-
-		perf.Step("Generate value object");
-
-		await JsonSerializer.SerializeAsync(stream, value, ViewerJsonContext.Default.ViewerJson);
+		await JsonSerializer.SerializeAsync(stream, meta, ViewerJsonMetadataContext.Default.JsonMeta, cancellationToken);
 
 		perf.Step("Serialize to JSON");
 		perf.End();
 	}
 
-	private static async Task<(Dictionary<Snowflake, ViewerJson.JsonUser> Users, List<Snowflake> UserIndex, Dictionary<ulong, int> UserIndices)> GenerateUserList(IDatabaseFile db, HashSet<ulong> userIds) {
+	public static async Task GetMessages(Stream stream, IDatabaseFile db, MessageFilter? filter = null, CancellationToken cancellationToken = default) {
+		var perf = Log.Start();
+
+		ReadOnlyMemory<byte> newLine = "\n"u8.ToArray();
+		
+		await foreach(var message in GenerateMessageList(db, filter, cancellationToken)) {
+			await JsonSerializer.SerializeAsync(stream, message, ViewerJsonMessageContext.Default.JsonMessage, cancellationToken);
+			await stream.WriteAsync(newLine, cancellationToken);
+		}
+
+		perf.Step("Generate and serialize messages to JSON");
+		perf.End();
+	}
+
+	private static async Task<Dictionary<Snowflake, ViewerJson.JsonUser>> GenerateUserList(IDatabaseFile db, CancellationToken cancellationToken) {
 		var users = new Dictionary<Snowflake, ViewerJson.JsonUser>();
-		var userIndex = new List<Snowflake>();
-		var userIndices = new Dictionary<ulong, int>();
 
-		await foreach (var user in db.Users.Get()) {
-			var id = user.Id;
-			if (!userIds.Contains(id)) {
-				continue;
-			}
-
-			var idSnowflake = new Snowflake(id);
-			userIndices[id] = users.Count;
-			userIndex.Add(idSnowflake);
-			
-			users[idSnowflake] = new ViewerJson.JsonUser {
+		await foreach (var user in db.Users.Get(cancellationToken)) {
+			users[user.Id] = new ViewerJson.JsonUser {
 				Name = user.Name,
+				DisplayName = user.DisplayName,
 				Avatar = user.AvatarUrl,
-				Tag = user.Discriminator
 			};
 		}
 
-		return (users, userIndex, userIndices);
+		return users;
 	}
 
-	private static async Task<(List<ViewerJson.JsonServer> Servers, Dictionary<ulong, int> ServerIndices)> GenerateServerList(IDatabaseFile db, HashSet<ulong> serverIds) {
-		var servers = new List<ViewerJson.JsonServer>();
-		var serverIndices = new Dictionary<ulong, int>();
+	private static async Task<Dictionary<Snowflake, ViewerJson.JsonServer>> GenerateServerList(IDatabaseFile db, HashSet<ulong> serverIds, CancellationToken cancellationToken) {
+		var servers = new Dictionary<Snowflake, ViewerJson.JsonServer>();
 
-		await foreach (var server in db.Servers.Get()) {
-			var id = server.Id;
-			if (!serverIds.Contains(id)) {
+		await foreach (var server in db.Servers.Get(cancellationToken)) {
+			if (!serverIds.Contains(server.Id)) {
 				continue;
 			}
 
-			serverIndices[id] = servers.Count;
-			
-			servers.Add(new ViewerJson.JsonServer {
+			servers[server.Id] = new ViewerJson.JsonServer {
 				Name = server.Name,
 				Type = ServerTypes.ToJsonViewerString(server.Type)
-			});
+			};
 		}
 
-		return (servers, serverIndices);
+		return servers;
 	}
 
-	private static Dictionary<Snowflake, ViewerJson.JsonChannel> GenerateChannelList(List<Channel> includedChannels, Dictionary<ulong, int> serverIndices) {
+	private static Dictionary<Snowflake, ViewerJson.JsonChannel> GenerateChannelList(List<Channel> includedChannels) {
 		var channels = new Dictionary<Snowflake, ViewerJson.JsonChannel>();
 
 		foreach (var channel in includedChannels) {
-			var channelIdSnowflake = new Snowflake(channel.Id);
-			
-			channels[channelIdSnowflake] = new ViewerJson.JsonChannel {
-				Server = serverIndices[channel.Server],
+			channels[channel.Id] = new ViewerJson.JsonChannel {
+				Server = channel.Server,
 				Name = channel.Name,
 				Parent = channel.ParentId?.ToString(),
 				Position = channel.Position,
@@ -125,51 +110,40 @@ public static class ViewerJsonExport {
 		return channels;
 	}
 
-	private static Dictionary<Snowflake, Dictionary<Snowflake, ViewerJson.JsonMessage>> GenerateMessageList(List<Message> includedMessages, Dictionary<ulong, int> userIndices, IViewerExportStrategy strategy) {
-		var data = new Dictionary<Snowflake, Dictionary<Snowflake, ViewerJson.JsonMessage>>();
+	private static async IAsyncEnumerable<ViewerJson.JsonMessage> GenerateMessageList(IDatabaseFile db, MessageFilter? filter, [EnumeratorCancellation] CancellationToken cancellationToken) {
+		await foreach (var message in db.Messages.Get(filter, cancellationToken)) {
+			yield return new ViewerJson.JsonMessage {
+				Id = message.Id,
+				C = message.Channel,
+				U = message.Sender,
+				T = message.Timestamp,
+				M = string.IsNullOrEmpty(message.Text) ? null : message.Text,
+				Te = message.EditTimestamp,
+				R = message.RepliedToId?.ToString(),
 
-		foreach (var grouping in includedMessages.GroupBy(static message => message.Channel)) {
-			var channelIdSnowflake = new Snowflake(grouping.Key);
-			var channelData = new Dictionary<Snowflake, ViewerJson.JsonMessage>();
+				A = message.Attachments.IsEmpty ? null : message.Attachments.Select(static attachment => {
+					var a = new ViewerJson.JsonMessageAttachment {
+						Url = attachment.DownloadUrl,
+						Name = Uri.TryCreate(attachment.NormalizedUrl, UriKind.Absolute, out var uri) ? Path.GetFileName(uri.LocalPath) : attachment.NormalizedUrl
+					};
 
-			foreach (var message in grouping) {
-				var messageIdSnowflake = new Snowflake(message.Id);
-				
-				channelData[messageIdSnowflake] = new ViewerJson.JsonMessage {
-					U = userIndices[message.Sender],
-					T = message.Timestamp,
-					M = string.IsNullOrEmpty(message.Text) ? null : message.Text,
-					Te = message.EditTimestamp,
-					R = message.RepliedToId?.ToString(),
-					
-					A = message.Attachments.IsEmpty ? null : message.Attachments.Select(attachment => {
-						var a = new ViewerJson.JsonMessageAttachment {
-							Url = strategy.GetAttachmentUrl(attachment),
-							Name = Uri.TryCreate(attachment.NormalizedUrl, UriKind.Absolute, out var uri) ? Path.GetFileName(uri.LocalPath) : attachment.NormalizedUrl
-						};
+					if (attachment is { Width: not null, Height: not null }) {
+						a.Width = attachment.Width;
+						a.Height = attachment.Height;
+					}
 
-						if (attachment is { Width: not null, Height: not null }) {
-							a.Width = attachment.Width;
-							a.Height = attachment.Height;
-						}
+					return a;
+				}).ToArray(),
 
-						return a;
-					}).ToArray(),
-					
-					E = message.Embeds.IsEmpty ? null : message.Embeds.Select(static embed => embed.Json).ToArray(),
-					
-					Re = message.Reactions.IsEmpty ? null : message.Reactions.Select(static reaction => new ViewerJson.JsonMessageReaction {
-						Id = reaction.EmojiId?.ToString(),
-						N = reaction.EmojiName,
-						A = reaction.EmojiFlags.HasFlag(EmojiFlags.Animated),
-						C = reaction.Count
-					}).ToArray()
-				};
-			}
+				E = message.Embeds.IsEmpty ? null : message.Embeds.Select(static embed => embed.Json).ToArray(),
 
-			data[channelIdSnowflake] = channelData;
+				Re = message.Reactions.IsEmpty ? null : message.Reactions.Select(static reaction => new ViewerJson.JsonMessageReaction {
+					Id = reaction.EmojiId?.ToString(),
+					N = reaction.EmojiName,
+					A = reaction.EmojiFlags.HasFlag(EmojiFlags.Animated),
+					C = reaction.Count
+				}).ToArray()
+			};
 		}
-
-		return data;
 	}
 }

app/Server/Database/Export/ViewerJsonMessageContext.cs

@@ -0,0 +1,11 @@
+using System.Text.Json.Serialization;
+
+namespace DHT.Server.Database.Export;
+
+[JsonSourceGenerationOptions(
+	Converters = [typeof(SnowflakeJsonSerializer)],
+	PropertyNamingPolicy = JsonKnownNamingPolicy.CamelCase,
+	GenerationMode = JsonSourceGenerationMode.Default
+)]
+[JsonSerializable(typeof(ViewerJson.JsonMessage))]
+sealed partial class ViewerJsonMessageContext : JsonSerializerContext;

app/Server/Database/Export/ViewerJsonMetadataContext.cs

@@ -3,9 +3,9 @@ using System.Text.Json.Serialization;
 namespace DHT.Server.Database.Export;
 
 [JsonSourceGenerationOptions(
-	Converters = new [] { typeof(SnowflakeJsonSerializer) },
+	Converters = [typeof(SnowflakeJsonSerializer)],
 	PropertyNamingPolicy = JsonKnownNamingPolicy.CamelCase,
 	GenerationMode = JsonSourceGenerationMode.Default
 )]
-[JsonSerializable(typeof(ViewerJson))]
-sealed partial class ViewerJsonContext : JsonSerializerContext {}
+[JsonSerializable(typeof(ViewerJson.JsonMeta))]
+sealed partial class ViewerJsonMetadataContext : JsonSerializerContext;

app/Server/Database/IDatabaseFile.cs

@@ -4,11 +4,10 @@ using DHT.Server.Database.Repositories;
 
 namespace DHT.Server.Database;
 
-public interface IDatabaseFile : IDisposable {
+public interface IDatabaseFile : IAsyncDisposable {
 	string Path { get; }
-	DatabaseStatistics Statistics { get; }
-	Task<DatabaseStatisticsSnapshot> SnapshotStatistics();
 
+	ISettingsRepository Settings { get; }
 	IUserRepository Users { get; }
 	IServerRepository Servers { get; }
 	IChannelRepository Channels { get; }

app/Server/Database/Import/DiscordEmbedLegacyJsonContext.cs

@@ -4,4 +4,4 @@ namespace DHT.Server.Database.Import;
 
 [JsonSourceGenerationOptions(PropertyNamingPolicy = JsonKnownNamingPolicy.SnakeCaseLower, GenerationMode = JsonSourceGenerationMode.Default)]
 [JsonSerializable(typeof(DiscordEmbedLegacyJson))]
-sealed partial class DiscordEmbedLegacyJsonContext : JsonSerializerContext {}
+sealed partial class DiscordEmbedLegacyJsonContext : JsonSerializerContext;

app/Server/Database/Import/LegacyArchiveImport.cs

@@ -161,7 +161,7 @@ public static class LegacyArchiveImport {
 
 		var messagesObj = data.HasKey(channelIdStr) ? data.RequireObject(channelIdStr, DataPath) : (JsonElement?) null;
 		if (messagesObj == null) {
-			return Array.Empty<Message>();
+			return [];
 		}
 
 		return messagesObj.Value.EnumerateObject().Select(item => {

app/Server/Database/Repositories/IChannelRepository.cs

@@ -1,21 +1,34 @@
+using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Reactive.Linq;
+using System.Threading;
 using System.Threading.Tasks;
 using DHT.Server.Data;
 
 namespace DHT.Server.Database.Repositories;
 
 public interface IChannelRepository {
+	IObservable<long> TotalCount { get; }
+	
 	Task Add(IReadOnlyList<Channel> channels);
 	
-	IAsyncEnumerable<Channel> Get();
+	Task<long> Count(CancellationToken cancellationToken = default);
+	
+	IAsyncEnumerable<Channel> Get(CancellationToken cancellationToken = default);
 
 	internal sealed class Dummy : IChannelRepository {
+		public IObservable<long> TotalCount { get; } = Observable.Return(0L);
+
 		public Task Add(IReadOnlyList<Channel> channels) {
 			return Task.CompletedTask;
 		}
 
-		public IAsyncEnumerable<Channel> Get() {
+		public Task<long> Count(CancellationToken cancellationToken) {
+			return Task.FromResult(0L);
+		}
+
+		public IAsyncEnumerable<Channel> Get(CancellationToken cancellationToken) {
 			return AsyncEnumerable.Empty<Channel>();
 		}
 	}

app/Server/Database/Repositories/IDownloadRepository.cs

@@ -1,8 +1,10 @@
+using System;
 using System.Collections.Generic;
+using System.IO;
 using System.Linq;
+using System.Reactive.Linq;
 using System.Threading;
 using System.Threading.Tasks;
-using DHT.Server.Data;
 using DHT.Server.Data.Aggregations;
 using DHT.Server.Data.Filters;
 using DHT.Server.Download;
@@ -10,59 +12,63 @@ using DHT.Server.Download;
 namespace DHT.Server.Database.Repositories;
 
 public interface IDownloadRepository {
-	Task<long> CountAttachments(AttachmentFilter? filter = null, CancellationToken cancellationToken = default);
+	IObservable<long> TotalCount { get; }
 
-	Task AddDownload(Data.Download download);
+	Task AddDownload(Data.Download item, Stream? stream);
 
-	Task<DownloadStatusStatistics> GetStatistics(CancellationToken cancellationToken = default);
+	Task<long> Count(DownloadItemFilter filter, CancellationToken cancellationToken = default);
 	
-	IAsyncEnumerable<Data.Download> GetWithoutData();
+	Task<DownloadStatusStatistics> GetStatistics(DownloadItemFilter nonSkippedFilter, CancellationToken cancellationToken = default);
+	
+	IAsyncEnumerable<Data.Download> Get();
 
-	Task<Data.Download> HydrateWithData(Data.Download download);
+	Task<bool> GetDownloadData(string normalizedUrl, Func<Stream, Task> dataProcessor);
+	
+	Task<bool> GetSuccessfulDownloadWithData(string normalizedUrl, Func<Data.Download, Stream, CancellationToken, Task> dataProcessor, CancellationToken cancellationToken = default);
 
-	Task<DownloadedAttachment?> GetDownloadedAttachment(string normalizedUrl);
-
-	Task<int> EnqueueDownloadItems(AttachmentFilter? filter = null, CancellationToken cancellationToken = default);
-
-	IAsyncEnumerable<DownloadItem> PullEnqueuedDownloadItems(int count, CancellationToken cancellationToken = default);
-
-	Task RemoveDownloadItems(DownloadItemFilter? filter, FilterRemovalMode mode);
+	IAsyncEnumerable<DownloadItem> PullPendingDownloadItems(int count, DownloadItemFilter filter, CancellationToken cancellationToken = default);
+	
+	Task MoveDownloadingItemsBackToQueue(CancellationToken cancellationToken = default);
+	
+	Task<int> RetryFailed(CancellationToken cancellationToken = default);
 
 	internal sealed class Dummy : IDownloadRepository {
-		public Task<long> CountAttachments(AttachmentFilter? filter, CancellationToken cancellationToken) {
+		public IObservable<long> TotalCount { get; } = Observable.Return(0L);
+
+		public Task AddDownload(Data.Download item, Stream? stream) {
+			return Task.CompletedTask;
+		}
+
+		public Task<long> Count(DownloadItemFilter filter, CancellationToken cancellationToken) {
 			return Task.FromResult(0L);
 		}
 
-		public Task AddDownload(Data.Download download) {
-			return Task.CompletedTask;
-		}
-
-		public Task<DownloadStatusStatistics> GetStatistics(CancellationToken cancellationToken) {
+		public Task<DownloadStatusStatistics> GetStatistics(DownloadItemFilter nonSkippedFilter, CancellationToken cancellationToken) {
 			return Task.FromResult(new DownloadStatusStatistics());
 		}
 
-		public IAsyncEnumerable<Data.Download> GetWithoutData() {
+		public IAsyncEnumerable<Data.Download> Get() {
 			return AsyncEnumerable.Empty<Data.Download>();
 		}
 
-		public Task<Data.Download> HydrateWithData(Data.Download download) {
-			return Task.FromResult(download);
+		public Task<bool> GetDownloadData(string normalizedUrl, Func<Stream, Task> dataProcessor) {
+			return Task.FromResult(false);
 		}
 
-		public Task<DownloadedAttachment?> GetDownloadedAttachment(string normalizedUrl) {
-			return Task.FromResult<DownloadedAttachment?>(null);
+		public Task<bool> GetSuccessfulDownloadWithData(string normalizedUrl, Func<Data.Download, Stream, CancellationToken, Task> dataProcessor, CancellationToken cancellationToken) {
+			return Task.FromResult(false);
 		}
 
-		public Task<int> EnqueueDownloadItems(AttachmentFilter? filter, CancellationToken cancellationToken) {
-			return Task.FromResult(0);
-		}
-
-		public IAsyncEnumerable<DownloadItem> PullEnqueuedDownloadItems(int count, CancellationToken cancellationToken) {
+		public IAsyncEnumerable<DownloadItem> PullPendingDownloadItems(int count, DownloadItemFilter filter, CancellationToken cancellationToken) {
 			return AsyncEnumerable.Empty<DownloadItem>();
 		}
 
-		public Task RemoveDownloadItems(DownloadItemFilter? filter, FilterRemovalMode mode) {
+		public Task MoveDownloadingItemsBackToQueue(CancellationToken cancellationToken) {
 			return Task.CompletedTask;
 		}
+
+		public Task<int> RetryFailed(CancellationToken cancellationToken) {
+			return Task.FromResult(0);
+		}
 	}
 }