Fix UI freezing due to attachment download statistics being updated on the wrong thread

Closes #198

README.md

@@ -19,7 +19,7 @@ Folder organization:
 * `lib/` contains utilities required to build the project
 * `web/` contains source code of the [official website](https://dht.chylex.com), which can be used as a template when making your own website
 
-To start editing source code for the desktop app, install the [.NET 5 SDK](https://dotnet.microsoft.com/en-us/download/dotnet/5.0), and then open `app/DiscordHistoryTracker.sln` in [Visual Studio](https://visualstudio.microsoft.com/downloads/) or [Rider](https://www.jetbrains.com/rider/).
+To start editing source code for the desktop app, install the [.NET 8 SDK](https://dotnet.microsoft.com/en-us/download/dotnet/8.0), and then open `app/DiscordHistoryTracker.sln` in [Visual Studio](https://visualstudio.microsoft.com/downloads/) or [Rider](https://www.jetbrains.com/rider/).
 
 ### Building
 
@@ -50,6 +50,6 @@ Run the `app/build.sh` script, and read the [Distribution](#distribution) sectio
 
 #### Distribution
 
-The mentioned build scripts will prepare `Release` builds ready for distribution. Once the script finishes, the `app/bin` folder will contain self-contained executables for each major operating system, and a portable version that works on all other systems but requires .NET 5 to be installed.
+The mentioned build scripts will prepare `Release` builds ready for distribution. Once the script finishes, the `app/bin` folder will contain self-contained executables for each major operating system, and a portable version that works on all other systems but requires .NET 8 to be installed.
 
 Note that when building on Windows, the generated `.zip` files for Linux and Mac will not have correct file permissions, so it will not be possible to run them by double-clicking `DiscordHistoryTracker`. I tried using Python to re-create the archives with correct file permissions, but found that Linux `zip` tools could not see them. The only working solution is building the Windows + portable version on Windows, and Linux + Mac version on Linux.

app/Desktop/App.axaml

@@ -6,8 +6,8 @@
 
     <Application.Styles>
 
-        <FluentTheme Mode="Light" />
-        <StyleInclude Source="avares://Avalonia.Controls.DataGrid/Themes/Default.xaml" />
+        <FluentTheme />
+        <StyleInclude Source="avares://Avalonia.Controls.DataGrid/Themes/Simple.xaml" />
 
         <Style Selector="Button, CheckBox, RadioButton, Expander /template/ ToggleButton#ExpanderHeader">
             <Setter Property="Cursor" Value="Hand" />
@@ -48,70 +48,11 @@
             <Setter Property="Template" Value="{StaticResource InlineDataValidationContentTemplate}" />
         </Style>
 
-        <Style Selector="Expander /template/ ToggleButton#ExpanderHeader">
-            <Setter Property="HorizontalContentAlignment" Value="Left" />
-            <Setter Property="Template">
-                <ControlTemplate>
-                    <Border x:Name="ToggleButtonBackground">
-                        <Grid ColumnDefinitions="Auto,*" RowDefinitions="35">
-                            <Border x:Name="ExpandCollapseChevronBorder"
-                                    Grid.Column="0"
-                                    Width="35"
-                                    Height="35"
-                                    Margin="2,0"
-                                    RenderTransformOrigin="50%,50%">
-                                <Path x:Name="ExpandCollapseChevron"
-                                      HorizontalAlignment="Center"
-                                      VerticalAlignment="Center"
-                                      RenderTransformOrigin="50%,50%"
-                                      Stretch="None"
-                                      Stroke="{DynamicResource ExpanderChevronForeground}"
-                                      StrokeThickness="1" />
-                                <Border.RenderTransform>
-                                    <RotateTransform />
-                                </Border.RenderTransform>
-                            </Border>
-                            <ContentPresenter x:Name="PART_ContentPresenter"
-                                              Grid.Column="1"
-                                              Margin="0"
-                                              HorizontalContentAlignment="{TemplateBinding HorizontalContentAlignment}"
-                                              VerticalContentAlignment="Center"
-                                              Background="Transparent"
-                                              BorderBrush="Transparent"
-                                              BorderThickness="0"
-                                              Content="{TemplateBinding Content}"
-                                              ContentTemplate="{TemplateBinding ContentTemplate}"
-                                              TextBlock.Foreground="{DynamicResource ExpanderForeground}" />
-                        </Grid>
-                    </Border>
-                </ControlTemplate>
-            </Setter>
+        <Style Selector="Expander">
+            <Setter Property="MinHeight" Value="40" />
+            <Setter Property="HorizontalAlignment" Value="Stretch" />
         </Style>
-        <Style Selector="Expander:expanded /template/ ToggleButton#ExpanderHeader /template/ Border#ExpandCollapseChevronBorder">
-            <Style.Animations>
-                <Animation FillMode="Both" Duration="0:0:0.0625">
-                    <KeyFrame Cue="0%">
-                        <Setter Property="RotateTransform.Angle" Value="180" />
-                    </KeyFrame>
-                    <KeyFrame Cue="100%">
-                        <Setter Property="RotateTransform.Angle" Value="180" />
-                    </KeyFrame>
-                </Animation>
-            </Style.Animations>
-        </Style>
-        <Style Selector="Expander:not(:expanded) /template/ ToggleButton#ExpanderHeader /template/ Border#ExpandCollapseChevronBorder">
-            <Style.Animations>
-                <Animation FillMode="Both" Duration="0:0:0.0625">
-                    <KeyFrame Cue="0%">
-                        <Setter Property="RotateTransform.Angle" Value="0" />
-                    </KeyFrame>
-                    <KeyFrame Cue="100%">
-                        <Setter Property="RotateTransform.Angle" Value="0" />
-                    </KeyFrame>
-                </Animation>
-            </Style.Animations>
-        </Style>
-
+        
     </Application.Styles>
 
     <Application.Resources>
@@ -165,15 +106,29 @@
         <SolidColorBrush x:Key="TextControlPlaceholderForegroundPointerOver" Color="#AAAAAA" />
         <SolidColorBrush x:Key="TextControlPlaceholderForegroundFocused" Color="#AAAAAA" />
         <SolidColorBrush x:Key="TextControlPlaceholderForegroundDisabled" Color="#AAAAAA" />
-
+        
         <Thickness x:Key="ExpanderHeaderPadding">15,0</Thickness>
         <Thickness x:Key="ExpanderContentPadding">12</Thickness>
-        <SolidColorBrush x:Key="ExpanderBorderBrush" Color="#697DAB" />
-        <SolidColorBrush x:Key="ExpanderBackground" Color="#697DAB" />
-        <SolidColorBrush x:Key="ExpanderForeground" Color="#FFFFFF" />
+        <SolidColorBrush x:Key="ExpanderHeaderBorderBrush" Color="#697DAB" />
+        <SolidColorBrush x:Key="ExpanderHeaderBorderBrushPointerOver" Color="#697DAB" />
+        <SolidColorBrush x:Key="ExpanderHeaderBorderBrushPressed" Color="#697DAB" />
+        <SolidColorBrush x:Key="ExpanderHeaderBorderBrushDisabled" Color="#697DAB" />
+        <SolidColorBrush x:Key="ExpanderHeaderBackground" Color="#697DAB" />
+        <SolidColorBrush x:Key="ExpanderHeaderBackgroundPointerOver" Color="#536794" />
+        <SolidColorBrush x:Key="ExpanderHeaderBackgroundPressed" Color="#47587F" />
+        <SolidColorBrush x:Key="ExpanderHeaderBackgroundDisabled" Color="#697DAB" />
+        <SolidColorBrush x:Key="ExpanderHeaderForeground" Color="#FFFFFF" />
+        <SolidColorBrush x:Key="ExpanderHeaderForegroundPointerOver" Color="#FFFFFF" />
+        <SolidColorBrush x:Key="ExpanderHeaderForegroundPressed" Color="#FFFFFF" />
+        <SolidColorBrush x:Key="ExpanderHeaderForegroundDisabled" Color="#FFFFFF" />
+        <SolidColorBrush x:Key="ExpanderChevronBackground" Color="Transparent" />
+        <SolidColorBrush x:Key="ExpanderChevronBackgroundPointerOver" Color="#536794" />
+        <SolidColorBrush x:Key="ExpanderChevronBackgroundPressed" Color="#47587F" />
+        <SolidColorBrush x:Key="ExpanderChevronBackgroundDisabled" Color="Transparent" />
         <SolidColorBrush x:Key="ExpanderChevronForeground" Color="#FFFFFF" />
-        <SolidColorBrush x:Key="ExpanderDropDownBorderBrush" Color="#697DAB" />
-        <SolidColorBrush x:Key="ExpanderDropDownBackground" Color="#FFFFFF" />
+        <SolidColorBrush x:Key="ExpanderChevronForegroundPointerOver" Color="#FFFFFF" />
+        <SolidColorBrush x:Key="ExpanderChevronForegroundPressed" Color="#FFFFFF" />
+        <SolidColorBrush x:Key="ExpanderChevronForegroundDisabled" Color="#FFFFFF" />
 
     </Application.Resources>
 

app/Desktop/App.axaml.cs

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

app/Desktop/Arguments.cs

@@ -1,64 +1,64 @@
 using System;
 using DHT.Utils.Logging;
 
-namespace DHT.Desktop {
-	sealed class Arguments {
-		private static readonly Log Log = Log.ForType<Arguments>();
+namespace DHT.Desktop;
 
-		public static Arguments Empty => new(Array.Empty<string>());
+sealed class Arguments {
+	private static readonly Log Log = Log.ForType<Arguments>();
 
-		public string? DatabaseFile { get; }
-		public ushort? ServerPort { get; }
-		public string? ServerToken { get; }
+	public static Arguments Empty => new(Array.Empty<string>());
 
-		public Arguments(string[] args) {
-			for (int i = 0; i < args.Length; i++) {
-				string key = args[i];
+	public string? DatabaseFile { get; }
+	public ushort? ServerPort { get; }
+	public string? ServerToken { get; }
 
-				switch (key) {
-					case "-debug":
-						Log.IsDebugEnabled = true;
-						continue;
-				}
+	public Arguments(string[] args) {
+		for (int i = 0; i < args.Length; i++) {
+			string key = args[i];
 
-				string value;
-
-				if (i == 0 && !key.StartsWith('-')) {
-					value = key;
-					key = "-db";
-				}
-				else if (i >= args.Length - 1) {
-					Log.Warn("Missing value for command line argument: " + key);
+			switch (key) {
+				case "-debug":
+					Log.IsDebugEnabled = true;
 					continue;
-				}
-				else {
-					value = args[++i];
-				}
+			}
 
-				switch (key) {
-					case "-db":
-						DatabaseFile = value;
-						continue;
+			string value;
 
-					case "-port": {
-						if (ushort.TryParse(value, out var port)) {
-							ServerPort = port;
-						}
-						else {
-							Log.Warn("Invalid port number: " + value);
-						}
+			if (i == 0 && !key.StartsWith('-')) {
+				value = key;
+				key = "-db";
+			}
+			else if (i >= args.Length - 1) {
+				Log.Warn("Missing value for command line argument: " + key);
+				continue;
+			}
+			else {
+				value = args[++i];
+			}
 
-						continue;
+			switch (key) {
+				case "-db":
+					DatabaseFile = value;
+					continue;
+
+				case "-port": {
+					if (ushort.TryParse(value, out var port)) {
+						ServerPort = port;
+					}
+					else {
+						Log.Warn("Invalid port number: " + value);
 					}
 
-					case "-token":
-						ServerToken = value;
-						continue;
-
-					default:
-						Log.Warn("Unknown command line argument: " + key);
-						break;
+					continue;
 				}
+
+				case "-token":
+					ServerToken = value;
+					continue;
+
+				default:
+					Log.Warn("Unknown command line argument: " + key);
+					break;
 			}
 		}
 	}

app/Desktop/Common/BytesValueConverter.cs

@@ -2,52 +2,52 @@ using System;
 using System.Globalization;
 using Avalonia.Data.Converters;
 
-namespace DHT.Desktop.Common {
-	sealed class BytesValueConverter : IValueConverter {
-		private sealed class Unit {
-			private readonly string label;
-			private readonly string numberFormat;
-			
-			public Unit(string label, int decimalPlaces) {
-				this.label = label;
-				this.numberFormat = "{0:n" + decimalPlaces + "}";
-			}
-			
-			public string Format(double size) {
-				return string.Format(Program.Culture, numberFormat, size) + " " + label;
-			}
-		}
-		
-		private static readonly Unit[] Units = {
-			new ("B", decimalPlaces: 0),
-			new ("kB", decimalPlaces: 0),
-			new ("MB", decimalPlaces: 1),
-			new ("GB", decimalPlaces: 1),
-			new ("TB", decimalPlaces: 1)
-		};
+namespace DHT.Desktop.Common;
 
-		private const int Scale = 1000;
+sealed class BytesValueConverter : IValueConverter {
+	private sealed class Unit {
+		private readonly string label;
+		private readonly string numberFormat;
 
-		private static string Convert(ulong size) {
-			int power = size == 0L ? 0 : (int) Math.Log(size, Scale);
-			int unit = power >= Units.Length ? Units.Length - 1 : power;
-			return Units[unit].Format(unit == 0 ? size : size / Math.Pow(Scale, unit));
+		public Unit(string label, int decimalPlaces) {
+			this.label = label;
+			this.numberFormat = "{0:n" + decimalPlaces + "}";
 		}
 
-		public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture) {
-			if (value is long size and >= 0L) {
-				return Convert((ulong) size);
-			}
-			else if (value is ulong usize) {
-				return Convert(usize);
-			}
-			else {
-				return "-";
-			}
-		}
-
-		public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture) {
-			throw new NotSupportedException();
+		public string Format(double size) {
+			return string.Format(Program.Culture, numberFormat, size) + " " + label;
 		}
 	}
+
+	private static readonly Unit[] Units = {
+		new ("B", decimalPlaces: 0),
+		new ("kB", decimalPlaces: 0),
+		new ("MB", decimalPlaces: 1),
+		new ("GB", decimalPlaces: 1),
+		new ("TB", decimalPlaces: 1)
+	};
+
+	private const int Scale = 1000;
+
+	private static string Convert(ulong size) {
+		int power = size == 0L ? 0 : (int) Math.Log(size, Scale);
+		int unit = power >= Units.Length ? Units.Length - 1 : power;
+		return Units[unit].Format(unit == 0 ? size : size / Math.Pow(Scale, unit));
+	}
+
+	public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture) {
+		if (value is long size and >= 0L) {
+			return Convert((ulong) size);
+		}
+		else if (value is ulong usize) {
+			return Convert(usize);
+		}
+		else {
+			return "-";
+		}
+	}
+
+	public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture) {
+		throw new NotSupportedException();
+	}
 }

app/Desktop/Common/DatabaseGui.cs

@@ -3,64 +3,66 @@ using System.Collections.Generic;
 using System.IO;
 using System.Threading.Tasks;
 using Avalonia.Controls;
+using Avalonia.Platform.Storage;
+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.Utils.Logging;
 
-namespace DHT.Desktop.Common {
-	static class DatabaseGui {
-		private static readonly Log Log = Log.ForType(typeof(DatabaseGui));
+namespace DHT.Desktop.Common;
 
-		private const string DatabaseFileInitialName = "archive.dht";
+static class DatabaseGui {
+	private static readonly Log Log = Log.ForType(typeof(DatabaseGui));
 
-		private static readonly List<FileDialogFilter> DatabaseFileDialogFilter = new() {
-			new FileDialogFilter {
-				Name = "Discord History Tracker Database",
-				Extensions = { "dht" }
-			}
-		};
+	private const string DatabaseFileInitialName = "archive.dht";
 
-		public static OpenFileDialog NewOpenDatabaseFileDialog() {
-			return new OpenFileDialog {
-				Title = "Open Database File",
-				InitialFileName = DatabaseFileInitialName,
-				Filters = DatabaseFileDialogFilter
-			};
+	private static readonly IReadOnlyList<FilePickerFileType> DatabaseFileDialogFilter = new List<FilePickerFileType> {
+		FileDialogs.CreateFilter("Discord History Tracker Database", new [] { "dht" })
+	};
+
+	public static async Task<string[]> NewOpenDatabaseFilesDialog(Window window, string? suggestedDirectory) {
+		return await window.StorageProvider.OpenFiles(new FilePickerOpenOptions {
+			Title = "Open Database File",
+			FileTypeFilter = DatabaseFileDialogFilter,
+			SuggestedStartLocation = await FileDialogs.GetSuggestedStartLocation(window, suggestedDirectory),
+			AllowMultiple = true
+		});
+	}
+
+	public static async Task<string?> NewOpenOrCreateDatabaseFileDialog(Window window, string? suggestedDirectory) {
+		return await window.StorageProvider.SaveFile(new FilePickerSaveOptions {
+			Title = "Open or Create Database File",
+			FileTypeChoices = DatabaseFileDialogFilter,
+			SuggestedFileName = DatabaseFileInitialName,
+			SuggestedStartLocation = await FileDialogs.GetSuggestedStartLocation(window, suggestedDirectory),
+			ShowOverwritePrompt = false
+		});
+	}
+
+	public static async Task<IDatabaseFile?> TryOpenOrCreateDatabaseFromPath(string path, Window window, Func<Task<bool>> checkCanUpgradeDatabase) {
+		IDatabaseFile? file = null;
+
+		try {
+			file = await SqliteDatabaseFile.OpenOrCreate(path, checkCanUpgradeDatabase);
+		} catch (InvalidDatabaseVersionException ex) {
+			await Dialog.ShowOk(window, "Database Error", "Database '" + Path.GetFileName(path) + "' appears to be corrupted (invalid version: " + ex.Version + ").");
+		} catch (DatabaseTooNewException ex) {
+			await Dialog.ShowOk(window, "Database Error", "Database '" + Path.GetFileName(path) + "' was opened in a newer version of DHT (database version " + ex.DatabaseVersion + ", app version " + ex.CurrentVersion + ").");
+		} catch (Exception ex) {
+			Log.Error(ex);
+			await Dialog.ShowOk(window, "Database Error", "Database '" + Path.GetFileName(path) + "' could not be opened:" + ex.Message);
 		}
 
-		public static SaveFileDialog NewOpenOrCreateDatabaseFileDialog() {
-			return new SaveFileDialog {
-				Title = "Open or Create Database File",
-				InitialFileName = DatabaseFileInitialName,
-				Filters = DatabaseFileDialogFilter
-			};
-		}
+		return file;
+	}
 
-		public static async Task<IDatabaseFile?> TryOpenOrCreateDatabaseFromPath(string path, Window window, Func<Task<bool>> checkCanUpgradeDatabase) {
-			IDatabaseFile? file = null;
+	public static async Task<DialogResult.YesNo> ShowCanUpgradeDatabaseDialog(Window window) {
+		return await Dialog.ShowYesNo(window, "Database Upgrade", "This database was created with an older version of DHT. If you proceed, the database will be upgraded and will no longer open in previous versions of DHT.\n\nPlease ensure you have a backup of the database. Do you want to proceed with the upgrade?");
+	}
 
-			try {
-				file = await SqliteDatabaseFile.OpenOrCreate(path, checkCanUpgradeDatabase);
-			} catch (InvalidDatabaseVersionException ex) {
-				await Dialog.ShowOk(window, "Database Error", "Database '" + Path.GetFileName(path) + "' appears to be corrupted (invalid version: " + ex.Version + ").");
-			} catch (DatabaseTooNewException ex) {
-				await Dialog.ShowOk(window, "Database Error", "Database '" + Path.GetFileName(path) + "' was opened in a newer version of DHT (database version " + ex.DatabaseVersion + ", app version " + ex.CurrentVersion + ").");
-			} catch (Exception ex) {
-				Log.Error(ex);
-				await Dialog.ShowOk(window, "Database Error", "Database '" + Path.GetFileName(path) + "' could not be opened:" + ex.Message);
-			}
-
-			return file;
-		}
-
-		public static async Task<DialogResult.YesNo> ShowCanUpgradeDatabaseDialog(Window window) {
-			return await Dialog.ShowYesNo(window, "Database Upgrade", "This database was created with an older version of DHT. If you proceed, the database will be upgraded and will no longer open in previous versions of DHT.\n\nPlease ensure you have a backup of the database. Do you want to proceed with the upgrade?");
-		}
-
-		public static async Task<DialogResult.YesNo> ShowCanUpgradeMultipleDatabaseDialog(Window window) {
-			return await Dialog.ShowYesNo(window, "Database Upgrade", "One or more databases were created with an older version of DHT. If you proceed, these databases will be upgraded and will no longer open in previous versions of DHT. Otherwise, these databases will be skipped.\n\nPlease ensure you have a backup of the databases. Do you want to proceed with the upgrade?");
-		}
+	public static async Task<DialogResult.YesNo> ShowCanUpgradeMultipleDatabaseDialog(Window window) {
+		return await Dialog.ShowYesNo(window, "Database Upgrade", "One or more databases were created with an older version of DHT. If you proceed, these databases will be upgraded and will no longer open in previous versions of DHT. Otherwise, these databases will be skipped.\n\nPlease ensure you have a backup of the databases. Do you want to proceed with the upgrade?");
 	}
 }

app/Desktop/Common/NumberValueConverter.cs

@@ -2,14 +2,14 @@ using System;
 using System.Globalization;
 using Avalonia.Data.Converters;
 
-namespace DHT.Desktop.Common {
-	sealed class NumberValueConverter : IValueConverter {
-		public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture) {
-			return value == null ? "-" : string.Format(Program.Culture, "{0:n0}", value);
-		}
+namespace DHT.Desktop.Common;
 
-		public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture) {
-			throw new NotSupportedException();
-		}
+sealed class NumberValueConverter : IValueConverter {
+	public object Convert(object? value, Type targetType, object? parameter, CultureInfo culture) {
+		return value == null ? "-" : string.Format(Program.Culture, "{0:n0}", value);
+	}
+
+	public object ConvertBack(object? value, Type targetType, object? parameter, CultureInfo culture) {
+		throw new NotSupportedException();
 	}
 }

app/Desktop/Common/TextFormat.cs

@@ -1,19 +1,19 @@
-namespace DHT.Desktop.Common {
-	static class TextFormat {
-		public static string Format(this int number) {
-			return number.ToString("N0", Program.Culture);
-		}
+namespace DHT.Desktop.Common;
 
-		public static string Format(this long number) {
-			return number.ToString("N0", Program.Culture);
-		}
+static class TextFormat {
+	public static string Format(this int number) {
+		return number.ToString("N0", Program.Culture);
+	}
 
-		public static string Pluralize(this int number, string singular) {
-			return number.Format() + "\u00A0" + (number == 1 ? singular : singular + "s");
-		}
+	public static string Format(this long number) {
+		return number.ToString("N0", Program.Culture);
+	}
 
-		public static string Pluralize(this long number, string singular) {
-			return number.Format() + "\u00A0" + (number == 1 ? singular : singular + "s");
-		}
+	public static string Pluralize(this int number, string singular) {
+		return number.Format() + "\u00A0" + (number == 1 ? singular : singular + "s");
+	}
+
+	public static string Pluralize(this long number, string singular) {
+		return number.Format() + "\u00A0" + (number == 1 ? singular : singular + "s");
 	}
 }

app/Desktop/Desktop.csproj

@@ -1,7 +1,6 @@
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
-    <TargetFramework>net5.0</TargetFramework>
     <Nullable>enable</Nullable>
     <AssemblyName>DiscordHistoryTracker</AssemblyName>
     <RootNamespace>DHT.Desktop</RootNamespace>
@@ -21,10 +20,13 @@
     <DebugType>none</DebugType>
   </PropertyGroup>
   <ItemGroup>
-    <PackageReference Include="Avalonia" Version="0.10.18" />
-    <PackageReference Include="Avalonia.Controls.DataGrid" Version="0.10.18" />
-    <PackageReference Include="Avalonia.Desktop" Version="0.10.18" />
-    <PackageReference Include="Avalonia.Diagnostics" Version="0.10.18" Condition=" '$(Configuration)' == 'Debug' " />
+    <PackageReference Include="Avalonia" Version="11.0.0" />
+    <PackageReference Include="Avalonia.Controls.DataGrid" Version="11.0.0" />
+    <PackageReference Include="Avalonia.Controls.ItemsRepeater" Version="11.0.0" />
+    <PackageReference Include="Avalonia.Desktop" Version="11.0.0" />
+    <PackageReference Include="Avalonia.Diagnostics" Version="11.0.0" Condition=" '$(Configuration)' == 'Debug' " />
+    <PackageReference Include="Avalonia.Fonts.Inter" Version="11.0.0" />
+    <PackageReference Include="Avalonia.Themes.Fluent" Version="11.0.0" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\Server\Server.csproj" />

app/Desktop/Dialogs/CheckBox/CheckBoxDialog.axaml

@@ -34,7 +34,7 @@
 
     <StackPanel Margin="20">
         <ScrollViewer MaxHeight="400">
-            <ItemsRepeater Items="{Binding Items}">
+            <ItemsRepeater ItemsSource="{Binding Items}">
                 <ItemsRepeater.ItemTemplate>
                     <DataTemplate>
                         <CheckBox IsChecked="{Binding Checked}">

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

@@ -1,31 +1,21 @@
 using System.Diagnostics.CodeAnalysis;
-using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
-using Avalonia.Markup.Xaml;
 using DHT.Desktop.Dialogs.Message;
 
-namespace DHT.Desktop.Dialogs.CheckBox {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class CheckBoxDialog : Window {
-		public CheckBoxDialog() {
-			InitializeComponent();
-			#if DEBUG
-			this.AttachDevTools();
-			#endif
-		}
+namespace DHT.Desktop.Dialogs.CheckBox;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class CheckBoxDialog : Window {
+	public CheckBoxDialog() {
+		InitializeComponent();
+	}
 
-		public void ClickOk(object? sender, RoutedEventArgs e) {
-			Close(DialogResult.OkCancel.Ok);
-		}
+	public void ClickOk(object? sender, RoutedEventArgs e) {
+		Close(DialogResult.OkCancel.Ok);
+	}
 
-		public void ClickCancel(object? sender, RoutedEventArgs e) {
-			Close(DialogResult.OkCancel.Cancel);
-		}
+	public void ClickCancel(object? sender, RoutedEventArgs e) {
+		Close(DialogResult.OkCancel.Cancel);
 	}
 }
-

app/Desktop/Dialogs/CheckBox/CheckBoxDialogModel.cs

@@ -4,67 +4,67 @@ using System.ComponentModel;
 using System.Linq;
 using DHT.Utils.Models;
 
-namespace DHT.Desktop.Dialogs.CheckBox {
-	class CheckBoxDialogModel : BaseModel {
-		public string Title { get; init; } = "";
+namespace DHT.Desktop.Dialogs.CheckBox;
 
-		private IReadOnlyList<CheckBoxItem> items = Array.Empty<CheckBoxItem>();
+class CheckBoxDialogModel : BaseModel {
+	public string Title { get; init; } = "";
 
-		public IReadOnlyList<CheckBoxItem> Items {
-			get => items;
+	private IReadOnlyList<CheckBoxItem> items = Array.Empty<CheckBoxItem>();
 
-			protected set {
-				foreach (var item in items) {
-					item.PropertyChanged -= OnItemPropertyChanged;
-				}
+	public IReadOnlyList<CheckBoxItem> Items {
+		get => items;
 
-				items = value;
-
-				foreach (var item in items) {
-					item.PropertyChanged += OnItemPropertyChanged;
-				}
-			}
-		}
-
-		private bool pauseCheckEvents = false;
-
-		public bool AreAllSelected => Items.All(static item => item.Checked);
-		public bool AreNoneSelected => Items.All(static item => !item.Checked);
-
-		public void SelectAll() => SetAllChecked(true);
-		public void SelectNone() => SetAllChecked(false);
-
-		private void SetAllChecked(bool isChecked) {
-			pauseCheckEvents = true;
-
-			foreach (var item in Items) {
-				item.Checked = isChecked;
+		protected set {
+			foreach (var item in items) {
+				item.PropertyChanged -= OnItemPropertyChanged;
 			}
 
-			pauseCheckEvents = false;
-			UpdateBulkButtons();
-		}
+			items = value;
 
-		private void UpdateBulkButtons() {
-			OnPropertyChanged(nameof(AreAllSelected));
-			OnPropertyChanged(nameof(AreNoneSelected));
-		}
-
-		private void OnItemPropertyChanged(object? sender, PropertyChangedEventArgs e) {
-			if (!pauseCheckEvents && e.PropertyName == nameof(CheckBoxItem.Checked)) {
-				UpdateBulkButtons();
+			foreach (var item in items) {
+				item.PropertyChanged += OnItemPropertyChanged;
 			}
 		}
 	}
 
-	sealed class CheckBoxDialogModel<T> : CheckBoxDialogModel {
-		public new IReadOnlyList<CheckBoxItem<T>> Items { get; }
+	private bool pauseCheckEvents = false;
 
-		public IEnumerable<CheckBoxItem<T>> SelectedItems => Items.Where(static item => item.Checked);
+	public bool AreAllSelected => Items.All(static item => item.Checked);
+	public bool AreNoneSelected => Items.All(static item => !item.Checked);
 
-		public CheckBoxDialogModel(IEnumerable<CheckBoxItem<T>> items) {
-			this.Items = new List<CheckBoxItem<T>>(items);
-			base.Items = this.Items;
+	public void SelectAll() => SetAllChecked(true);
+	public void SelectNone() => SetAllChecked(false);
+
+	private void SetAllChecked(bool isChecked) {
+		pauseCheckEvents = true;
+
+		foreach (var item in Items) {
+			item.Checked = isChecked;
+		}
+
+		pauseCheckEvents = false;
+		UpdateBulkButtons();
+	}
+
+	private void UpdateBulkButtons() {
+		OnPropertyChanged(nameof(AreAllSelected));
+		OnPropertyChanged(nameof(AreNoneSelected));
+	}
+
+	private void OnItemPropertyChanged(object? sender, PropertyChangedEventArgs e) {
+		if (!pauseCheckEvents && e.PropertyName == nameof(CheckBoxItem.Checked)) {
+			UpdateBulkButtons();
 		}
 	}
 }
+
+sealed class CheckBoxDialogModel<T> : CheckBoxDialogModel {
+	public new IReadOnlyList<CheckBoxItem<T>> Items { get; }
+
+	public IEnumerable<CheckBoxItem<T>> SelectedItems => Items.Where(static item => item.Checked);
+
+	public CheckBoxDialogModel(IEnumerable<CheckBoxItem<T>> items) {
+		this.Items = new List<CheckBoxItem<T>>(items);
+		base.Items = this.Items;
+	}
+}

app/Desktop/Dialogs/CheckBox/CheckBoxItem.cs

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

app/Desktop/Dialogs/File/FileDialogs.cs

@@ -0,0 +1,36 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Threading.Tasks;
+using Avalonia.Controls;
+using Avalonia.Platform.Storage;
+
+namespace DHT.Desktop.Dialogs.File;
+
+static class FileDialogs {
+	public static async Task<string[]> OpenFiles(this IStorageProvider storageProvider, FilePickerOpenOptions options) {
+		return (await storageProvider.OpenFilePickerAsync(options)).ToLocalPaths();
+	}
+
+	public static async Task<string?> SaveFile(this IStorageProvider storageProvider, FilePickerSaveOptions options) {
+		return (await storageProvider.SaveFilePickerAsync(options))?.ToLocalPath();
+	}
+
+	public static FilePickerFileType CreateFilter(string name, string[] extensions) {
+		return new FilePickerFileType(name) {
+			Patterns = extensions.Select(static ext => "*." + ext).ToArray()
+		};
+	}
+
+	public static Task<IStorageFolder?> GetSuggestedStartLocation(Window window, string? suggestedDirectory) {
+		return suggestedDirectory == null ? Task.FromResult<IStorageFolder?>(null) : window.StorageProvider.TryGetFolderFromPathAsync(suggestedDirectory);
+	}
+
+	private static string ToLocalPath(this IStorageFile file) {
+		return file.TryGetLocalPath() ?? throw new NotSupportedException("Local filesystem is not supported.");
+	}
+
+	private static string[] ToLocalPaths(this IReadOnlyList<IStorageFile> files) {
+		return files.Select(ToLocalPath).ToArray();
+	}
+}

app/Desktop/Dialogs/Message/Dialog.cs

@@ -2,73 +2,73 @@ using System.Threading.Tasks;
 using Avalonia.Controls;
 using Avalonia.Threading;
 
-namespace DHT.Desktop.Dialogs.Message {
-	static class Dialog {
-		public static async Task ShowOk(Window owner, string title, string message) {
-			if (!Dispatcher.UIThread.CheckAccess()) {
-				await Dispatcher.UIThread.InvokeAsync(() => ShowOk(owner, title, message));
-				return;
-			}
+namespace DHT.Desktop.Dialogs.Message;
 
-			await new MessageDialog {
-				DataContext = new MessageDialogModel {
-					Title = title,
-					Message = message,
-					IsOkVisible = true
-				}
-			}.ShowDialog<DialogResult.All>(owner);
+static class Dialog {
+	public static async Task ShowOk(Window owner, string title, string message) {
+		if (!Dispatcher.UIThread.CheckAccess()) {
+			await Dispatcher.UIThread.InvokeAsync(() => ShowOk(owner, title, message));
+			return;
 		}
 
-		public static async Task<DialogResult.OkCancel> ShowOkCancel(Window owner, string title, string message) {
-			if (!Dispatcher.UIThread.CheckAccess()) {
-				return await Dispatcher.UIThread.InvokeAsync(() => ShowOkCancel(owner, title, message));
+		await new MessageDialog {
+			DataContext = new MessageDialogModel {
+				Title = title,
+				Message = message,
+				IsOkVisible = true
 			}
+		}.ShowDialog<DialogResult.All>(owner);
+	}
 
-			var result = await new MessageDialog {
-				DataContext = new MessageDialogModel {
-					Title = title,
-					Message = message,
-					IsOkVisible = true,
-					IsCancelVisible = true
-				}
-			}.ShowDialog<DialogResult.All?>(owner);
-
-			return result.ToOkCancel();
+	public static async Task<DialogResult.OkCancel> ShowOkCancel(Window owner, string title, string message) {
+		if (!Dispatcher.UIThread.CheckAccess()) {
+			return await Dispatcher.UIThread.InvokeAsync(() => ShowOkCancel(owner, title, message));
 		}
 
-		public static async Task<DialogResult.YesNo> ShowYesNo(Window owner, string title, string message) {
-			if (!Dispatcher.UIThread.CheckAccess()) {
-				return await Dispatcher.UIThread.InvokeAsync(() => ShowYesNo(owner, title, message));
+		var result = await new MessageDialog {
+			DataContext = new MessageDialogModel {
+				Title = title,
+				Message = message,
+				IsOkVisible = true,
+				IsCancelVisible = true
 			}
+		}.ShowDialog<DialogResult.All?>(owner);
 
-			var result = await new MessageDialog {
-				DataContext = new MessageDialogModel {
-					Title = title,
-					Message = message,
-					IsYesVisible = true,
-					IsNoVisible = true
-				}
-			}.ShowDialog<DialogResult.All?>(owner);
+		return result.ToOkCancel();
+	}
 
-			return result.ToYesNo();
+	public static async Task<DialogResult.YesNo> ShowYesNo(Window owner, string title, string message) {
+		if (!Dispatcher.UIThread.CheckAccess()) {
+			return await Dispatcher.UIThread.InvokeAsync(() => ShowYesNo(owner, title, message));
 		}
 
-		public static async Task<DialogResult.YesNoCancel> ShowYesNoCancel(Window owner, string title, string message) {
-			if (!Dispatcher.UIThread.CheckAccess()) {
-				return await Dispatcher.UIThread.InvokeAsync(() => ShowYesNoCancel(owner, title, message));
+		var result = await new MessageDialog {
+			DataContext = new MessageDialogModel {
+				Title = title,
+				Message = message,
+				IsYesVisible = true,
+				IsNoVisible = true
 			}
+		}.ShowDialog<DialogResult.All?>(owner);
 
-			var result = await new MessageDialog {
-				DataContext = new MessageDialogModel {
-					Title = title,
-					Message = message,
-					IsYesVisible = true,
-					IsNoVisible = true,
-					IsCancelVisible = true
-				}
-			}.ShowDialog<DialogResult.All?>(owner);
+		return result.ToYesNo();
+	}
 
-			return result.ToYesNoCancel();
+	public static async Task<DialogResult.YesNoCancel> ShowYesNoCancel(Window owner, string title, string message) {
+		if (!Dispatcher.UIThread.CheckAccess()) {
+			return await Dispatcher.UIThread.InvokeAsync(() => ShowYesNoCancel(owner, title, message));
 		}
+
+		var result = await new MessageDialog {
+			DataContext = new MessageDialogModel {
+				Title = title,
+				Message = message,
+				IsYesVisible = true,
+				IsNoVisible = true,
+				IsCancelVisible = true
+			}
+		}.ShowDialog<DialogResult.All?>(owner);
+
+		return result.ToYesNoCancel();
 	}
 }

app/Desktop/Dialogs/Message/DialogResult.cs

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

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

@@ -1,37 +1,28 @@
 using System.Diagnostics.CodeAnalysis;
-using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Dialogs.Message {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class MessageDialog : Window {
-		public MessageDialog() {
-			InitializeComponent();
-			#if DEBUG
-			this.AttachDevTools();
-			#endif
-		}
+namespace DHT.Desktop.Dialogs.Message;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class MessageDialog : Window {
+	public MessageDialog() {
+		InitializeComponent();
+	}
 
-		public void ClickOk(object? sender, RoutedEventArgs e) {
-			Close(DialogResult.All.Ok);
-		}
+	public void ClickOk(object? sender, RoutedEventArgs e) {
+		Close(DialogResult.All.Ok);
+	}
 
-		public void ClickYes(object? sender, RoutedEventArgs e) {
-			Close(DialogResult.All.Yes);
-		}
+	public void ClickYes(object? sender, RoutedEventArgs e) {
+		Close(DialogResult.All.Yes);
+	}
 
-		public void ClickNo(object? sender, RoutedEventArgs e) {
-			Close(DialogResult.All.No);
-		}
+	public void ClickNo(object? sender, RoutedEventArgs e) {
+		Close(DialogResult.All.No);
+	}
 
-		public void ClickCancel(object? sender, RoutedEventArgs e) {
-			Close(DialogResult.All.Cancel);
-		}
+	public void ClickCancel(object? sender, RoutedEventArgs e) {
+		Close(DialogResult.All.Cancel);
 	}
 }

app/Desktop/Dialogs/Message/MessageDialogModel.cs

@@ -1,11 +1,11 @@
-namespace DHT.Desktop.Dialogs.Message {
-	sealed class MessageDialogModel {
-		public string Title { get; init; } = "";
-		public string Message { get; init; } = "";
+namespace DHT.Desktop.Dialogs.Message;
 
-		public bool IsOkVisible { get; init; } = false;
-		public bool IsYesVisible { get; init; } = false;
-		public bool IsNoVisible { get; init; } = false;
-		public bool IsCancelVisible { get; init; } = false;
-	}
+sealed class MessageDialogModel {
+	public string Title { get; init; } = "";
+	public string Message { get; init; } = "";
+
+	public bool IsOkVisible { get; init; } = false;
+	public bool IsYesVisible { get; init; } = false;
+	public bool IsNoVisible { get; init; } = false;
+	public bool IsCancelVisible { get; init; } = false;
 }

app/Desktop/Dialogs/Progress/IProgressCallback.cs

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

app/Desktop/Dialogs/Progress/ProgressDialog.axaml

@@ -7,7 +7,7 @@
         x:Class="DHT.Desktop.Dialogs.Progress.ProgressDialog"
         Title="{Binding Title}"
         Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
-        Opened="Loaded"
+        Opened="OnOpened"
         Closing="OnClosing"
         Width="500" SizeToContent="Height" CanResize="False"
         WindowStartupLocation="CenterOwner">

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

@@ -1,40 +1,30 @@
 using System;
-using System.ComponentModel;
 using System.Diagnostics.CodeAnalysis;
 using System.Threading.Tasks;
-using Avalonia;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Dialogs.Progress {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class ProgressDialog : Window {
-		private bool isFinished = false;
+namespace DHT.Desktop.Dialogs.Progress;
 
-		public ProgressDialog() {
-			InitializeComponent();
-			#if DEBUG
-			this.AttachDevTools();
-			#endif
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class ProgressDialog : Window {
+	private bool isFinished = false;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+	public ProgressDialog() {
+		InitializeComponent();
+	}
 
-		public void OnClosing(object? sender, CancelEventArgs e) {
-			e.Cancel = !isFinished;
-		}
-
-		public void Loaded(object? sender, EventArgs e) {
-			if (DataContext is ProgressDialogModel model) {
-				Task.Run(model.StartTask).ContinueWith(OnFinished, TaskScheduler.FromCurrentSynchronizationContext());
-			}
-		}
-
-		private void OnFinished(Task task) {
-			isFinished = true;
-			Close();
+	public void OnOpened(object? sender, EventArgs e) {
+		if (DataContext is ProgressDialogModel model) {
+			Task.Run(model.StartTask).ContinueWith(OnFinished, TaskScheduler.FromCurrentSynchronizationContext());
 		}
 	}
+
+	public void OnClosing(object? sender, WindowClosingEventArgs e) {
+		e.Cancel = !isFinished;
+	}
+
+	private void OnFinished(Task task) {
+		isFinished = true;
+		Close();
+	}
 }

app/Desktop/Dialogs/Progress/ProgressDialogModel.cs

@@ -4,62 +4,62 @@ using Avalonia.Threading;
 using DHT.Desktop.Common;
 using DHT.Utils.Models;
 
-namespace DHT.Desktop.Dialogs.Progress {
-	sealed class ProgressDialogModel : BaseModel {
-		public string Title { get; init; } = "";
+namespace DHT.Desktop.Dialogs.Progress;
 
-		private string message = "";
+sealed class ProgressDialogModel : BaseModel {
+	public string Title { get; init; } = "";
 
-		public string Message {
-			get => message;
-			private set => Change(ref message, value);
+	private string message = "";
+
+	public string Message {
+		get => message;
+		private set => Change(ref message, value);
+	}
+
+	private string items = "";
+
+	public string Items {
+		get => items;
+		private set => Change(ref items, value);
+	}
+
+	private int progress = 0;
+
+	public int Progress {
+		get => progress;
+		private set => Change(ref progress, value);
+	}
+
+	private readonly TaskRunner? task;
+
+	[Obsolete("Designer")]
+	public ProgressDialogModel() {}
+
+	public ProgressDialogModel(TaskRunner task) {
+		this.task = task;
+	}
+
+	internal async Task StartTask() {
+		if (task != null) {
+			await task(new Callback(this));
+		}
+	}
+
+	public delegate Task TaskRunner(IProgressCallback callback);
+
+	private sealed class Callback : IProgressCallback {
+		private readonly ProgressDialogModel model;
+
+		public Callback(ProgressDialogModel model) {
+			this.model = model;
 		}
 
-		private string items = "";
-
-		public string Items {
-			get => items;
-			private set => Change(ref items, value);
-		}
-
-		private int progress = 0;
-
-		public int Progress {
-			get => progress;
-			private set => Change(ref progress, value);
-		}
-
-		private readonly TaskRunner? task;
-
-		[Obsolete("Designer")]
-		public ProgressDialogModel() {}
-
-		public ProgressDialogModel(TaskRunner task) {
-			this.task = task;
-		}
-
-		internal async Task StartTask() {
-			if (task != null) {
-				await task(new Callback(this));
-			}
-		}
-
-		public delegate Task TaskRunner(IProgressCallback callback);
-
-		private sealed class Callback : IProgressCallback {
-			private readonly ProgressDialogModel model;
-
-			public Callback(ProgressDialogModel model) {
-				this.model = model;
-			}
-
-			async Task IProgressCallback.Update(string message, int finishedItems, int totalItems) {
-				await Dispatcher.UIThread.InvokeAsync(() => {
-					model.Message = message;
-					model.Items = finishedItems.Format() + " / " + totalItems.Format();
-					model.Progress = 100 * finishedItems / totalItems;
-				});
-			}
+		async Task IProgressCallback.Update(string message, int finishedItems, int totalItems) {
+			await Dispatcher.UIThread.InvokeAsync(() => {
+				model.Message = message;
+				model.Items = finishedItems.Format() + " / " + totalItems.Format();
+				model.Progress = 100 * finishedItems / totalItems;
+			});
 		}
 	}
 }

app/Desktop/Dialogs/TextBox/TextBoxDialog.axaml

@@ -31,7 +31,7 @@
         <ScrollViewer MaxHeight="400">
             <StackPanel Spacing="10">
                 <TextBlock Text="{Binding Description}" TextWrapping="Wrap" />
-                <ItemsRepeater Items="{Binding Items}">
+                <ItemsRepeater ItemsSource="{Binding Items}">
                     <ItemsRepeater.ItemTemplate>
                         <DataTemplate>
                             <DockPanel Margin="0 5 25 0">

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

@@ -1,31 +1,21 @@
 using System.Diagnostics.CodeAnalysis;
-using Avalonia;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
-using Avalonia.Markup.Xaml;
 using DHT.Desktop.Dialogs.Message;
 
-namespace DHT.Desktop.Dialogs.TextBox {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class TextBoxDialog : Window {
-		public TextBoxDialog() {
-			InitializeComponent();
-			#if DEBUG
-			this.AttachDevTools();
-			#endif
-		}
+namespace DHT.Desktop.Dialogs.TextBox; 
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class TextBoxDialog : Window {
+	public TextBoxDialog() {
+		InitializeComponent();
+	}
 
-		public void ClickOk(object? sender, RoutedEventArgs e) {
-			Close(DialogResult.OkCancel.Ok);
-		}
+	public void ClickOk(object? sender, RoutedEventArgs e) {
+		Close(DialogResult.OkCancel.Ok);
+	}
 
-		public void ClickCancel(object? sender, RoutedEventArgs e) {
-			Close(DialogResult.OkCancel.Cancel);
-		}
+	public void ClickCancel(object? sender, RoutedEventArgs e) {
+		Close(DialogResult.OkCancel.Cancel);
 	}
 }
-

app/Desktop/Dialogs/TextBox/TextBoxDialogModel.cs

@@ -4,44 +4,44 @@ using System.ComponentModel;
 using System.Linq;
 using DHT.Utils.Models;
 
-namespace DHT.Desktop.Dialogs.TextBox {
-	class TextBoxDialogModel : BaseModel {
-		public string Title { get; init; } = "";
-		public string Description { get; init; } = "";
+namespace DHT.Desktop.Dialogs.TextBox; 
 
-		private IReadOnlyList<TextBoxItem> items = Array.Empty<TextBoxItem>();
+class TextBoxDialogModel : BaseModel {
+	public string Title { get; init; } = "";
+	public string Description { get; init; } = "";
 
-		public IReadOnlyList<TextBoxItem> Items {
-			get => items;
+	private IReadOnlyList<TextBoxItem> items = Array.Empty<TextBoxItem>();
 
-			protected set {
-				foreach (var item in items) {
-					item.ErrorsChanged -= OnItemErrorsChanged;
-				}
+	public IReadOnlyList<TextBoxItem> Items {
+		get => items;
 
-				items = value;
+		protected set {
+			foreach (var item in items) {
+				item.ErrorsChanged -= OnItemErrorsChanged;
+			}
 
-				foreach (var item in items) {
-					item.ErrorsChanged += OnItemErrorsChanged;
-				}
+			items = value;
+
+			foreach (var item in items) {
+				item.ErrorsChanged += OnItemErrorsChanged;
 			}
 		}
-		
-		public bool HasErrors => Items.Any(static item => !item.IsValid);
-
-		private void OnItemErrorsChanged(object? sender, DataErrorsChangedEventArgs e) {
-			OnPropertyChanged(nameof(HasErrors));
-		}
 	}
+		
+	public bool HasErrors => Items.Any(static item => !item.IsValid);
 
-	sealed class TextBoxDialogModel<T> : TextBoxDialogModel {
-		public new IReadOnlyList<TextBoxItem<T>> Items { get; }
-
-		public IEnumerable<TextBoxItem<T>> ValidItems => Items.Where(static item => item.IsValid);
-
-		public TextBoxDialogModel(IEnumerable<TextBoxItem<T>> items) {
-			this.Items = new List<TextBoxItem<T>>(items);
-			base.Items = this.Items;
-		}
+	private void OnItemErrorsChanged(object? sender, DataErrorsChangedEventArgs e) {
+		OnPropertyChanged(nameof(HasErrors));
+	}
+}
+
+sealed class TextBoxDialogModel<T> : TextBoxDialogModel {
+	public new IReadOnlyList<TextBoxItem<T>> Items { get; }
+
+	public IEnumerable<TextBoxItem<T>> ValidItems => Items.Where(static item => item.IsValid);
+
+	public TextBoxDialogModel(IEnumerable<TextBoxItem<T>> items) {
+		this.Items = new List<TextBoxItem<T>>(items);
+		base.Items = this.Items;
 	}
 }

app/Desktop/Dialogs/TextBox/TextBoxItem.cs

@@ -3,40 +3,40 @@ using System.Collections;
 using System.ComponentModel;
 using DHT.Utils.Models;
 
-namespace DHT.Desktop.Dialogs.TextBox {
-	class TextBoxItem : BaseModel, INotifyDataErrorInfo {
-		public string Title { get; init; } = "";
-		public object? Item { get; init; } = null;
+namespace DHT.Desktop.Dialogs.TextBox; 
+
+class TextBoxItem : BaseModel, INotifyDataErrorInfo {
+	public string Title { get; init; } = "";
+	public object? Item { get; init; } = null;
 		
-		public Func<string, bool> ValidityCheck { get; init; } = static _ => true;
-		public bool IsValid => ValidityCheck(Value);
+	public Func<string, bool> ValidityCheck { get; init; } = static _ => true;
+	public bool IsValid => ValidityCheck(Value);
 
-		private string value = string.Empty;
+	private string value = string.Empty;
 
-		public string Value {
-			get => this.value;
-			set {
-				Change(ref this.value, value);
-				ErrorsChanged?.Invoke(this, new DataErrorsChangedEventArgs(nameof(Value)));
-			}
+	public string Value {
+		get => this.value;
+		set {
+			Change(ref this.value, value);
+			ErrorsChanged?.Invoke(this, new DataErrorsChangedEventArgs(nameof(Value)));
 		}
-
-		public IEnumerable GetErrors(string? propertyName) {
-			if (propertyName == nameof(Value) && !IsValid) {
-				yield return string.Empty;
-			}
-		}
-
-		public bool HasErrors => !IsValid;
-		public event EventHandler<DataErrorsChangedEventArgs>? ErrorsChanged;
 	}
 
-	sealed class TextBoxItem<T> : TextBoxItem {
-		public new T Item { get; }
-
-		public TextBoxItem(T item) {
-			this.Item = item;
-			base.Item = item;
+	public IEnumerable GetErrors(string? propertyName) {
+		if (propertyName == nameof(Value) && !IsValid) {
+			yield return string.Empty;
 		}
 	}
+
+	public bool HasErrors => !IsValid;
+	public event EventHandler<DataErrorsChangedEventArgs>? ErrorsChanged;
+}
+
+sealed class TextBoxItem<T> : TextBoxItem {
+	public new T Item { get; }
+
+	public TextBoxItem(T item) {
+		this.Item = item;
+		base.Item = item;
+	}
 }

app/Desktop/Discord/DiscordAppSettings.cs

@@ -9,111 +9,111 @@ using DHT.Utils.Logging;
 using static System.Environment.SpecialFolder;
 using static System.Environment.SpecialFolderOption;
 
-namespace DHT.Desktop.Discord {
-	static class DiscordAppSettings {
-		private static readonly Log Log = Log.ForType(typeof(DiscordAppSettings));
+namespace DHT.Desktop.Discord;
 
-		private const string JsonKeyDevTools = "DANGEROUS_ENABLE_DEVTOOLS_ONLY_ENABLE_IF_YOU_KNOW_WHAT_YOURE_DOING";
+static class DiscordAppSettings {
+	private static readonly Log Log = Log.ForType(typeof(DiscordAppSettings));
 
-		public static string JsonFilePath { get; }
-		private static string JsonBackupFilePath { get; }
+	private const string JsonKeyDevTools = "DANGEROUS_ENABLE_DEVTOOLS_ONLY_ENABLE_IF_YOU_KNOW_WHAT_YOURE_DOING";
 
-		[SuppressMessage("ReSharper", "ConvertIfStatementToConditionalTernaryExpression")]
-		static DiscordAppSettings() {
-			string rootFolder;
+	public static string JsonFilePath { get; }
+	private static string JsonBackupFilePath { get; }
 
-			if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
-				rootFolder = Path.Combine(Environment.GetFolderPath(ApplicationData, DoNotVerify), "Discord");
-			}
-			else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX)) {
-				rootFolder = Path.Combine(Environment.GetFolderPath(UserProfile, DoNotVerify), "Library", "Application Support", "Discord");
-			}
-			else {
-				rootFolder = Path.Combine(Environment.GetFolderPath(ApplicationData, DoNotVerify), "discord");
-			}
+	[SuppressMessage("ReSharper", "ConvertIfStatementToConditionalTernaryExpression")]
+	static DiscordAppSettings() {
+		string rootFolder;
 
-			JsonFilePath = Path.Combine(rootFolder, "settings.json");
-			JsonBackupFilePath = JsonFilePath + ".bak";
+		if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
+			rootFolder = Path.Combine(Environment.GetFolderPath(ApplicationData, DoNotVerify), "Discord");
+		}
+		else if (RuntimeInformation.IsOSPlatform(OSPlatform.OSX)) {
+			rootFolder = Path.Combine(Environment.GetFolderPath(UserProfile, DoNotVerify), "Library", "Application Support", "Discord");
+		}
+		else {
+			rootFolder = Path.Combine(Environment.GetFolderPath(ApplicationData, DoNotVerify), "discord");
 		}
 
-		public static async Task<bool?> AreDevToolsEnabled() {
-			try {
-				return AreDevToolsEnabled(await ReadSettingsJson());
-			} catch (Exception) {
-				return null;
-			}
-		}
+		JsonFilePath = Path.Combine(rootFolder, "settings.json");
+		JsonBackupFilePath = JsonFilePath + ".bak";
+	}
 
-		private static bool AreDevToolsEnabled(Dictionary<string, object?> json) {
-			return json.TryGetValue(JsonKeyDevTools, out var value) && value is JsonElement { ValueKind: JsonValueKind.True };
-		}
-
-		public static async Task<SettingsJsonResult> ConfigureDevTools(bool enable) {
-			Dictionary<string, object?> json;
-
-			try {
-				json = await ReadSettingsJson();
-			} catch (FileNotFoundException) {
-				return SettingsJsonResult.FileNotFound;
-			} catch (JsonException) {
-				return SettingsJsonResult.InvalidJson;
-			} catch (Exception e) {
-				Log.Error(e);
-				return SettingsJsonResult.ReadError;
-			}
-
-			if (enable == AreDevToolsEnabled(json)) {
-				return SettingsJsonResult.AlreadySet;
-			}
-
-			if (enable) {
-				json[JsonKeyDevTools] = true;
-			}
-			else {
-				json.Remove(JsonKeyDevTools);
-			}
-
-			try {
-				if (!File.Exists(JsonBackupFilePath)) {
-					File.Copy(JsonFilePath, JsonBackupFilePath);
-				}
-
-				await WriteSettingsJson(json);
-			} catch (Exception e) {
-				Log.Error("An error occurred when writing settings file.");
-				Log.Error(e);
-
-				if (File.Exists(JsonBackupFilePath)) {
-					try {
-						File.Move(JsonBackupFilePath, JsonFilePath, true);
-						Log.Info("Restored settings file from backup.");
-					} catch (Exception e2) {
-						Log.Error("Cannot restore settings file from backup.");
-						Log.Error(e2);
-					}
-				}
-
-				return SettingsJsonResult.WriteError;
-			}
-
-			try {
-				File.Delete(JsonBackupFilePath);
-			} catch (Exception e) {
-				Log.Error("Cannot delete backup file.");
-				Log.Error(e);
-			}
-
-			return SettingsJsonResult.Success;
-		}
-
-		private static async Task<Dictionary<string, object?>> ReadSettingsJson() {
-			await using var stream = new FileStream(JsonFilePath, FileMode.Open, FileAccess.Read, FileShare.Read);
-			return await JsonSerializer.DeserializeAsync<Dictionary<string, object?>?>(stream) ?? throw new JsonException();
-		}
-
-		private static async Task WriteSettingsJson(Dictionary<string, object?> json) {
-			await using var stream = new FileStream(JsonFilePath, FileMode.Truncate, FileAccess.Write, FileShare.None);
-			await JsonSerializer.SerializeAsync(stream, json, new JsonSerializerOptions { WriteIndented = true });
+	public static async Task<bool?> AreDevToolsEnabled() {
+		try {
+			return AreDevToolsEnabled(await ReadSettingsJson());
+		} catch (Exception) {
+			return null;
 		}
 	}
+
+	private static bool AreDevToolsEnabled(Dictionary<string, object?> json) {
+		return json.TryGetValue(JsonKeyDevTools, out var value) && value is JsonElement { ValueKind: JsonValueKind.True };
+	}
+
+	public static async Task<SettingsJsonResult> ConfigureDevTools(bool enable) {
+		Dictionary<string, object?> json;
+
+		try {
+			json = await ReadSettingsJson();
+		} catch (FileNotFoundException) {
+			return SettingsJsonResult.FileNotFound;
+		} catch (JsonException) {
+			return SettingsJsonResult.InvalidJson;
+		} catch (Exception e) {
+			Log.Error(e);
+			return SettingsJsonResult.ReadError;
+		}
+
+		if (enable == AreDevToolsEnabled(json)) {
+			return SettingsJsonResult.AlreadySet;
+		}
+
+		if (enable) {
+			json[JsonKeyDevTools] = true;
+		}
+		else {
+			json.Remove(JsonKeyDevTools);
+		}
+
+		try {
+			if (!File.Exists(JsonBackupFilePath)) {
+				File.Copy(JsonFilePath, JsonBackupFilePath);
+			}
+
+			await WriteSettingsJson(json);
+		} catch (Exception e) {
+			Log.Error("An error occurred when writing settings file.");
+			Log.Error(e);
+
+			if (File.Exists(JsonBackupFilePath)) {
+				try {
+					File.Move(JsonBackupFilePath, JsonFilePath, true);
+					Log.Info("Restored settings file from backup.");
+				} catch (Exception e2) {
+					Log.Error("Cannot restore settings file from backup.");
+					Log.Error(e2);
+				}
+			}
+
+			return SettingsJsonResult.WriteError;
+		}
+
+		try {
+			File.Delete(JsonBackupFilePath);
+		} catch (Exception e) {
+			Log.Error("Cannot delete backup file.");
+			Log.Error(e);
+		}
+
+		return SettingsJsonResult.Success;
+	}
+
+	private static async Task<Dictionary<string, object?>> ReadSettingsJson() {
+		await using var stream = new FileStream(JsonFilePath, FileMode.Open, FileAccess.Read, FileShare.Read);
+		return await JsonSerializer.DeserializeAsync<Dictionary<string, object?>?>(stream) ?? throw new JsonException();
+	}
+
+	private static async Task WriteSettingsJson(Dictionary<string, object?> json) {
+		await using var stream = new FileStream(JsonFilePath, FileMode.Truncate, FileAccess.Write, FileShare.None);
+		await JsonSerializer.SerializeAsync(stream, json, new JsonSerializerOptions { WriteIndented = true });
+	}
 }

app/Desktop/Discord/SettingsJsonResult.cs

@@ -1,10 +1,10 @@
-namespace DHT.Desktop.Discord {
-	enum SettingsJsonResult {
-		Success,
-		AlreadySet,
-		FileNotFound,
-		ReadError,
-		InvalidJson,
-		WriteError
-	}
+namespace DHT.Desktop.Discord;
+
+enum SettingsJsonResult {
+	Success,
+	AlreadySet,
+	FileNotFound,
+	ReadError,
+	InvalidJson,
+	WriteError
 }

app/Desktop/Main/AboutWindow.axaml

@@ -46,7 +46,7 @@
             <TextBlock Grid.Row="0" Grid.Column="1" FontWeight="Bold">License</TextBlock>
             <TextBlock Grid.Row="0" Grid.Column="2" FontWeight="Bold">Link</TextBlock>
 
-            <TextBlock Grid.Row="2" Grid.Column="0">.NET 5</TextBlock>
+            <TextBlock Grid.Row="2" Grid.Column="0">.NET 8</TextBlock>
             <TextBlock Grid.Row="2" Grid.Column="1">MIT</TextBlock>
             <Button Grid.Row="2" Grid.Column="2" Command="{Binding ShowLibraryNetCore}">GitHub</Button>
 

app/Desktop/Main/AboutWindow.axaml.cs

@@ -1,20 +1,11 @@
 using System.Diagnostics.CodeAnalysis;
-using Avalonia;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class AboutWindow : Window {
-		public AboutWindow() {
-			InitializeComponent();
-			#if DEBUG
-			this.AttachDevTools();
-			#endif
-		}
+namespace DHT.Desktop.Main;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class AboutWindow : Window {
+	public AboutWindow() {
+		InitializeComponent();
 	}
 }

app/Desktop/Main/AboutWindowModel.cs

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

app/Desktop/Main/Controls/AttachmentFilterPanel.axaml

@@ -36,7 +36,7 @@
                 <CheckBox IsChecked="{Binding LimitSize}">Limit Size</CheckBox>
                 <StackPanel Orientation="Horizontal">
                     <TextBox Text="{Binding MaximumSize}" IsEnabled="{Binding LimitSize}" HorizontalContentAlignment="Right" />
-                    <ComboBox IsEnabled="{Binding LimitSize}" Items="{Binding Units}" SelectedItem="{Binding MaximumSizeUnit}">
+                    <ComboBox IsEnabled="{Binding LimitSize}" ItemsSource="{Binding Units}" SelectedItem="{Binding MaximumSizeUnit}">
                         <ComboBox.ItemTemplate>
                             <DataTemplate>
                                 <TextBlock Text="{Binding Name}" />

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

@@ -1,17 +1,11 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main.Controls {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class AttachmentFilterPanel : UserControl {
-		public AttachmentFilterPanel() {
-			InitializeComponent();
-		}
+namespace DHT.Desktop.Main.Controls;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class AttachmentFilterPanel : UserControl {
+	public AttachmentFilterPanel() {
+		InitializeComponent();
 	}
 }
-

app/Desktop/Main/Controls/AttachmentFilterPanelModel.cs

@@ -7,123 +7,123 @@ 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);
+namespace DHT.Desktop.Main.Controls;
 
-		private static readonly Unit[] AllUnits = {
-			new ("B", 1),
-			new ("kB", 1024),
-			new ("MB", 1024 * 1024)
-		};
+sealed class AttachmentFilterPanelModel : BaseModel, IDisposable {
+	public sealed record Unit(string Name, uint Scale);
 
-		private static readonly HashSet<string> FilterProperties = new () {
-			nameof(LimitSize),
-			nameof(MaximumSize),
-			nameof(MaximumSizeUnit)
-		};
+	private static readonly Unit[] AllUnits = {
+		new ("B", 1),
+		new ("kB", 1024),
+		new ("MB", 1024 * 1024)
+	};
 
-		public string FilterStatisticsText { get; private set; } = "";
+	private static readonly HashSet<string> FilterProperties = new () {
+		nameof(LimitSize),
+		nameof(MaximumSize),
+		nameof(MaximumSizeUnit)
+	};
 
-		private bool limitSize = false;
-		private ulong maximumSize = 0L;
-		private Unit maximumSizeUnit = AllUnits[0];
+	public string FilterStatisticsText { get; private set; } = "";
 
-		public bool LimitSize {
-			get => limitSize;
-			set => Change(ref limitSize, value);
-		}
+	private bool limitSize = false;
+	private ulong maximumSize = 0L;
+	private Unit maximumSizeUnit = AllUnits[0];
 
-		public ulong MaximumSize {
-			get => maximumSize;
-			set => Change(ref maximumSize, value);
-		}
+	public bool LimitSize {
+		get => limitSize;
+		set => Change(ref limitSize, value);
+	}
 
-		public Unit MaximumSizeUnit {
-			get => maximumSizeUnit;
-			set => Change(ref maximumSizeUnit, value);
-		}
+	public ulong MaximumSize {
+		get => maximumSize;
+		set => Change(ref maximumSize, value);
+	}
 
-		public IEnumerable<Unit> Units => AllUnits;
+	public Unit MaximumSizeUnit {
+		get => maximumSizeUnit;
+		set => Change(ref maximumSizeUnit, value);
+	}
 
-		private readonly IDatabaseFile db;
-		private readonly string verb;
+	public IEnumerable<Unit> Units => AllUnits;
 
-		private readonly AsyncValueComputer<long> matchingAttachmentCountComputer;
-		private long? matchingAttachmentCount;
-		private long? totalAttachmentCount;
+	private readonly IDatabaseFile db;
+	private readonly string verb;
 
-		[Obsolete("Designer")]
-		public AttachmentFilterPanelModel() : this(DummyDatabaseFile.Instance) {}
+	private readonly AsyncValueComputer<long> matchingAttachmentCountComputer;
+	private long? matchingAttachmentCount;
+	private long? totalAttachmentCount;
 
-		public AttachmentFilterPanelModel(IDatabaseFile db, string verb = "Matches") {
-			this.db = db;
-			this.verb = verb;
+	[Obsolete("Designer")]
+	public AttachmentFilterPanelModel() : this(DummyDatabaseFile.Instance) {}
 
-			this.matchingAttachmentCountComputer = AsyncValueComputer<long>.WithResultProcessor(SetAttachmentCounts).Build();
+	public AttachmentFilterPanelModel(IDatabaseFile db, string verb = "Matches") {
+		this.db = db;
+		this.verb = verb;
 
+		this.matchingAttachmentCountComputer = AsyncValueComputer<long>.WithResultProcessor(SetAttachmentCounts).Build();
+
+		UpdateFilterStatistics();
+
+		PropertyChanged += OnPropertyChanged;
+		db.Statistics.PropertyChanged += OnDbStatisticsChanged;
+	}
+
+	public void Dispose() {
+		db.Statistics.PropertyChanged -= OnDbStatisticsChanged;
+	}
+
+	private void OnPropertyChanged(object? sender, PropertyChangedEventArgs e) {
+		if (e.PropertyName != null && FilterProperties.Contains(e.PropertyName)) {
 			UpdateFilterStatistics();
-			
-			PropertyChanged += OnPropertyChanged;
-			db.Statistics.PropertyChanged += OnDbStatisticsChanged;
-		}
-
-		public void Dispose() {
-			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 = db.Statistics.TotalAttachments;
-				UpdateFilterStatistics();
-			}
-		}
-
-		private void UpdateFilterStatistics() {
-			var filter = CreateFilter();
-			if (filter.IsEmpty) {
-				matchingAttachmentCountComputer.Cancel();
-				matchingAttachmentCount = totalAttachmentCount;
-				UpdateFilterStatisticsText();
-			}
-			else {
-				matchingAttachmentCount = null;
-				UpdateFilterStatisticsText();
-				matchingAttachmentCountComputer.Compute(() => db.CountAttachments(filter));
-			}
-		}
-
-		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;
 		}
 	}
+
+	private void OnDbStatisticsChanged(object? sender, PropertyChangedEventArgs e) {
+		if (e.PropertyName == nameof(DatabaseStatistics.TotalAttachments)) {
+			totalAttachmentCount = db.Statistics.TotalAttachments;
+			UpdateFilterStatistics();
+		}
+	}
+
+	private void UpdateFilterStatistics() {
+		var filter = CreateFilter();
+		if (filter.IsEmpty) {
+			matchingAttachmentCountComputer.Cancel();
+			matchingAttachmentCount = totalAttachmentCount;
+			UpdateFilterStatisticsText();
+		}
+		else {
+			matchingAttachmentCount = null;
+			UpdateFilterStatisticsText();
+			matchingAttachmentCountComputer.Compute(() => db.CountAttachments(filter));
+		}
+	}
+
+	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/MessageFilterPanel.axaml.cs

@@ -1,34 +1,26 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main.Controls {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class MessageFilterPanel : UserControl {
-		private CalendarDatePicker StartDatePicker => this.FindControl<CalendarDatePicker>("StartDatePicker");
-		private CalendarDatePicker EndDatePicker => this.FindControl<CalendarDatePicker>("EndDatePicker");
+namespace DHT.Desktop.Main.Controls;
 
-		public MessageFilterPanel() {
-			InitializeComponent();
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class MessageFilterPanel : UserControl {
+	public MessageFilterPanel() {
+		InitializeComponent();
+
+		var culture = Program.Culture;
+		foreach (var picker in new CalendarDatePicker[] { StartDatePicker, EndDatePicker }) {
+			picker.FirstDayOfWeek = culture.DateTimeFormat.FirstDayOfWeek;
+			picker.SelectedDateFormat = CalendarDatePickerFormat.Custom;
+			picker.CustomDateFormatString = culture.DateTimeFormat.ShortDatePattern;
+			picker.Watermark = culture.DateTimeFormat.ShortDatePattern;
 		}
+	}
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-
-			var culture = Program.Culture;
-			foreach (var picker in new CalendarDatePicker[] { StartDatePicker, EndDatePicker }) {
-				picker.FirstDayOfWeek = culture.DateTimeFormat.FirstDayOfWeek;
-				picker.SelectedDateFormat = CalendarDatePickerFormat.Custom;
-				picker.CustomDateFormatString = culture.DateTimeFormat.ShortDatePattern;
-				picker.Watermark = culture.DateTimeFormat.ShortDatePattern;
-			}
-		}
-
-		public void CalendarDatePicker_OnSelectedDateChanged(object? sender, SelectionChangedEventArgs e) {
-			if (DataContext is MessageFilterPanelModel model) {
-				model.StartDate = StartDatePicker.SelectedDate;
-				model.EndDate = EndDatePicker.SelectedDate;
-			}
+	public void CalendarDatePicker_OnSelectedDateChanged(object? sender, SelectionChangedEventArgs e) {
+		if (DataContext is MessageFilterPanelModel model) {
+			model.StartDate = StartDatePicker.SelectedDate;
+			model.EndDate = EndDatePicker.SelectedDate;
 		}
 	}
 }

app/Desktop/Main/Controls/MessageFilterPanelModel.cs

@@ -14,272 +14,272 @@ using DHT.Server.Database;
 using DHT.Utils.Models;
 using DHT.Utils.Tasks;
 
-namespace DHT.Desktop.Main.Controls {
-	sealed class MessageFilterPanelModel : BaseModel, IDisposable {
-		private static readonly HashSet<string> FilterProperties = new () {
-			nameof(FilterByDate),
-			nameof(StartDate),
-			nameof(EndDate),
-			nameof(FilterByChannel),
-			nameof(IncludedChannels),
-			nameof(FilterByUser),
-			nameof(IncludedUsers)
-		};
+namespace DHT.Desktop.Main.Controls;
 
-		public string FilterStatisticsText { get; private set; } = "";
+sealed class MessageFilterPanelModel : BaseModel, IDisposable {
+	private static readonly HashSet<string> FilterProperties = new () {
+		nameof(FilterByDate),
+		nameof(StartDate),
+		nameof(EndDate),
+		nameof(FilterByChannel),
+		nameof(IncludedChannels),
+		nameof(FilterByUser),
+		nameof(IncludedUsers)
+	};
 
-		public event PropertyChangedEventHandler? FilterPropertyChanged;
+	public string FilterStatisticsText { get; private set; } = "";
 
-		public bool HasAnyFilters => FilterByDate || FilterByChannel || FilterByUser;
+	public event PropertyChangedEventHandler? FilterPropertyChanged;
 
-		private bool filterByDate = false;
-		private DateTime? startDate = null;
-		private DateTime? endDate = null;
-		private bool filterByChannel = false;
-		private HashSet<ulong>? includedChannels = null;
-		private bool filterByUser = false;
-		private HashSet<ulong>? includedUsers = null;
+	public bool HasAnyFilters => FilterByDate || FilterByChannel || FilterByUser;
 
-		public bool FilterByDate {
-			get => filterByDate;
-			set => Change(ref filterByDate, value);
-		}
+	private bool filterByDate = false;
+	private DateTime? startDate = null;
+	private DateTime? endDate = null;
+	private bool filterByChannel = false;
+	private HashSet<ulong>? includedChannels = null;
+	private bool filterByUser = false;
+	private HashSet<ulong>? includedUsers = null;
 
-		public DateTime? StartDate {
-			get => startDate;
-			set => Change(ref startDate, value);
-		}
+	public bool FilterByDate {
+		get => filterByDate;
+		set => Change(ref filterByDate, value);
+	}
 
-		public DateTime? EndDate {
-			get => endDate;
-			set => Change(ref endDate, value);
-		}
+	public DateTime? StartDate {
+		get => startDate;
+		set => Change(ref startDate, value);
+	}
 
-		public bool FilterByChannel {
-			get => filterByChannel;
-			set => Change(ref filterByChannel, value);
-		}
+	public DateTime? EndDate {
+		get => endDate;
+		set => Change(ref endDate, value);
+	}
 
-		public HashSet<ulong> IncludedChannels {
-			get => includedChannels ?? db.GetAllChannels().Select(static channel => channel.Id).ToHashSet();
-			set => Change(ref includedChannels, value);
-		}
+	public bool FilterByChannel {
+		get => filterByChannel;
+		set => Change(ref filterByChannel, value);
+	}
 
-		public bool FilterByUser {
-			get => filterByUser;
-			set => Change(ref filterByUser, value);
-		}
+	public HashSet<ulong> IncludedChannels {
+		get => includedChannels ?? db.GetAllChannels().Select(static channel => channel.Id).ToHashSet();
+		set => Change(ref includedChannels, value);
+	}
 
-		public HashSet<ulong> IncludedUsers {
-			get => includedUsers ?? db.GetAllUsers().Select(static user => user.Id).ToHashSet();
-			set => Change(ref includedUsers, value);
-		}
+	public bool FilterByUser {
+		get => filterByUser;
+		set => Change(ref filterByUser, value);
+	}
 
-		private string channelFilterLabel = "";
+	public HashSet<ulong> IncludedUsers {
+		get => includedUsers ?? db.GetAllUsers().Select(static user => user.Id).ToHashSet();
+		set => Change(ref includedUsers, value);
+	}
 
-		public string ChannelFilterLabel {
-			get => channelFilterLabel;
-			set => Change(ref channelFilterLabel, value);
-		}
+	private string channelFilterLabel = "";
 
-		private string userFilterLabel = "";
+	public string ChannelFilterLabel {
+		get => channelFilterLabel;
+		set => Change(ref channelFilterLabel, value);
+	}
 
-		public string UserFilterLabel {
-			get => userFilterLabel;
-			set => Change(ref userFilterLabel, value);
-		}
+	private string userFilterLabel = "";
 
-		private readonly Window window;
-		private readonly IDatabaseFile db;
-		private readonly string verb;
+	public string UserFilterLabel {
+		get => userFilterLabel;
+		set => Change(ref userFilterLabel, value);
+	}
 
-		private readonly AsyncValueComputer<long> exportedMessageCountComputer;
-		private long? exportedMessageCount;
-		private long? totalMessageCount;
+	private readonly Window window;
+	private readonly IDatabaseFile db;
+	private readonly string verb;
 
-		[Obsolete("Designer")]
-		public MessageFilterPanelModel() : this(null!, DummyDatabaseFile.Instance) {}
+	private readonly AsyncValueComputer<long> exportedMessageCountComputer;
+	private long? exportedMessageCount;
+	private long? totalMessageCount;
 
-		public MessageFilterPanelModel(Window window, IDatabaseFile db, string verb = "Matches") {
-			this.window = window;
-			this.db = db;
-			this.verb = verb;
-			
-			this.exportedMessageCountComputer = AsyncValueComputer<long>.WithResultProcessor(SetExportedMessageCount).Build();
+	[Obsolete("Designer")]
+	public MessageFilterPanelModel() : this(null!, DummyDatabaseFile.Instance) {}
 
+	public MessageFilterPanelModel(Window window, IDatabaseFile db, string verb = "Matches") {
+		this.window = window;
+		this.db = db;
+		this.verb = verb;
+
+		this.exportedMessageCountComputer = AsyncValueComputer<long>.WithResultProcessor(SetExportedMessageCount).Build();
+
+		UpdateFilterStatistics();
+		UpdateChannelFilterLabel();
+		UpdateUserFilterLabel();
+
+		PropertyChanged += OnPropertyChanged;
+		db.Statistics.PropertyChanged += OnDbStatisticsChanged;
+	}
+
+	public void Dispose() {
+		db.Statistics.PropertyChanged -= OnDbStatisticsChanged;
+	}
+
+	private void OnPropertyChanged(object? sender, PropertyChangedEventArgs e) {
+		if (e.PropertyName != null && FilterProperties.Contains(e.PropertyName)) {
 			UpdateFilterStatistics();
+			FilterPropertyChanged?.Invoke(sender, e);
+		}
+
+		if (e.PropertyName is nameof(FilterByChannel) or nameof(IncludedChannels)) {
 			UpdateChannelFilterLabel();
+		}
+		else if (e.PropertyName is nameof(FilterByUser) or nameof(IncludedUsers)) {
 			UpdateUserFilterLabel();
-
-			PropertyChanged += OnPropertyChanged;
-			db.Statistics.PropertyChanged += OnDbStatisticsChanged;
-		}
-
-		public void Dispose() {
-			db.Statistics.PropertyChanged -= OnDbStatisticsChanged;
-		}
-
-		private void OnPropertyChanged(object? sender, PropertyChangedEventArgs e) {
-			if (e.PropertyName != null && FilterProperties.Contains(e.PropertyName)) {
-				UpdateFilterStatistics();
-				FilterPropertyChanged?.Invoke(sender, e);
-			}
-
-			if (e.PropertyName is nameof(FilterByChannel) or nameof(IncludedChannels)) {
-				UpdateChannelFilterLabel();
-			}
-			else if (e.PropertyName is nameof(FilterByUser) or nameof(IncludedUsers)) {
-				UpdateUserFilterLabel();
-			}
-		}
-
-		private void OnDbStatisticsChanged(object? sender, PropertyChangedEventArgs e) {
-			if (e.PropertyName == nameof(DatabaseStatistics.TotalMessages)) {
-				totalMessageCount = db.Statistics.TotalMessages;
-				UpdateFilterStatistics();
-			}
-			else if (e.PropertyName == nameof(DatabaseStatistics.TotalChannels)) {
-				UpdateChannelFilterLabel();
-			}
-			else if (e.PropertyName == nameof(DatabaseStatistics.TotalUsers)) {
-				UpdateUserFilterLabel();
-			}
-		}
-
-		private void UpdateFilterStatistics() {
-			var filter = CreateFilter();
-			if (filter.IsEmpty) {
-				exportedMessageCountComputer.Cancel();
-				exportedMessageCount = totalMessageCount;
-				UpdateFilterStatisticsText();
-			}
-			else {
-				exportedMessageCount = null;
-				UpdateFilterStatisticsText();
-				exportedMessageCountComputer.Compute(() => db.CountMessages(filter));
-			}
-		}
-
-		private void SetExportedMessageCount(long exportedMessageCount) {
-			this.exportedMessageCount = exportedMessageCount;
-			UpdateFilterStatisticsText();
-		}
-		
-		private void UpdateFilterStatisticsText() {
-			var exportedMessageCountStr = exportedMessageCount?.Format() ?? "(...)";
-			var totalMessageCountStr = totalMessageCount?.Format() ?? "(...)";
-			
-			FilterStatisticsText = verb + " " + exportedMessageCountStr + " out of " + totalMessageCountStr + " message" + (totalMessageCount is null or 1 ? "." : "s.");
-			OnPropertyChanged(nameof(FilterStatisticsText));
-		}
-
-		public async void OpenChannelFilterDialog() {
-			var servers = db.GetAllServers().ToDictionary(static server => server.Id);
-			var items = new List<CheckBoxItem<ulong>>();
-			var included = IncludedChannels;
-
-			foreach (var channel in db.GetAllChannels()) {
-				var channelId = channel.Id;
-				var channelName = channel.Name;
-
-				string title;
-				if (servers.TryGetValue(channel.Server, out var server)) {
-					var titleBuilder = new StringBuilder();
-					var serverType = server.Type;
-
-					titleBuilder.Append('[')
-					            .Append(ServerTypes.ToString(serverType))
-					            .Append("] ");
-
-					if (serverType == ServerType.DirectMessage) {
-						titleBuilder.Append(channelName);
-					}
-					else {
-						titleBuilder.Append(server.Name)
-						            .Append(" - ")
-						            .Append(channelName);
-					}
-
-					title = titleBuilder.ToString();
-				}
-				else {
-					title = channelName;
-				}
-
-				items.Add(new CheckBoxItem<ulong>(channelId) {
-					Title = title,
-					Checked = included.Contains(channelId)
-				});
-			}
-
-			var result = await OpenIdFilterDialog(window, "Included Channels", items);
-			if (result != null) {
-				IncludedChannels = result;
-			}
-		}
-
-		public async void OpenUserFilterDialog() {
-			var items = new List<CheckBoxItem<ulong>>();
-			var included = IncludedUsers;
-
-			foreach (var user in db.GetAllUsers()) {
-				var name = user.Name;
-				var discriminator = user.Discriminator;
-
-				items.Add(new CheckBoxItem<ulong>(user.Id) {
-					Title = discriminator == null ? name : name + " #" + discriminator,
-					Checked = included.Contains(user.Id)
-				});
-			}
-
-			var result = await OpenIdFilterDialog(window, "Included Users", items);
-			if (result != null) {
-				IncludedUsers = result;
-			}
-		}
-
-		private void UpdateChannelFilterLabel() {
-			long total = db.Statistics.TotalChannels;
-			long included = FilterByChannel ? IncludedChannels.Count : total;
-			ChannelFilterLabel = "Selected " + included.Format() + " / " + total.Pluralize("channel") + ".";
-		}
-
-		private void UpdateUserFilterLabel() {
-			long total = db.Statistics.TotalUsers;
-			long included = FilterByUser ? IncludedUsers.Count : total;
-			UserFilterLabel = "Selected " + included.Format() + " / " + total.Pluralize("user") + ".";
-		}
-
-		public MessageFilter CreateFilter() {
-			MessageFilter filter = new();
-
-			if (FilterByDate) {
-				filter.StartDate = StartDate;
-				filter.EndDate = EndDate?.AddDays(1).AddMilliseconds(-1);
-			}
-
-			if (FilterByChannel) {
-				filter.ChannelIds = new HashSet<ulong>(IncludedChannels);
-			}
-
-			if (FilterByUser) {
-				filter.UserIds = new HashSet<ulong>(IncludedUsers);
-			}
-
-			return filter;
-		}
-
-		private static async Task<HashSet<ulong>?> OpenIdFilterDialog(Window window, string title, List<CheckBoxItem<ulong>> items) {
-			items.Sort(static (item1, item2) => item1.Title.CompareTo(item2.Title));
-
-			var model = new CheckBoxDialogModel<ulong>(items) {
-				Title = title
-			};
-
-			var dialog = new CheckBoxDialog { DataContext = model };
-			var result = await dialog.ShowDialog<DialogResult.OkCancel>(window);
-
-			return result == DialogResult.OkCancel.Ok ? model.SelectedItems.Select(static item => item.Item).ToHashSet() : null;
 		}
 	}
+
+	private void OnDbStatisticsChanged(object? sender, PropertyChangedEventArgs e) {
+		if (e.PropertyName == nameof(DatabaseStatistics.TotalMessages)) {
+			totalMessageCount = db.Statistics.TotalMessages;
+			UpdateFilterStatistics();
+		}
+		else if (e.PropertyName == nameof(DatabaseStatistics.TotalChannels)) {
+			UpdateChannelFilterLabel();
+		}
+		else if (e.PropertyName == nameof(DatabaseStatistics.TotalUsers)) {
+			UpdateUserFilterLabel();
+		}
+	}
+
+	private void UpdateFilterStatistics() {
+		var filter = CreateFilter();
+		if (filter.IsEmpty) {
+			exportedMessageCountComputer.Cancel();
+			exportedMessageCount = totalMessageCount;
+			UpdateFilterStatisticsText();
+		}
+		else {
+			exportedMessageCount = null;
+			UpdateFilterStatisticsText();
+			exportedMessageCountComputer.Compute(() => db.CountMessages(filter));
+		}
+	}
+
+	private void SetExportedMessageCount(long exportedMessageCount) {
+		this.exportedMessageCount = exportedMessageCount;
+		UpdateFilterStatisticsText();
+	}
+
+	private void UpdateFilterStatisticsText() {
+		var exportedMessageCountStr = exportedMessageCount?.Format() ?? "(...)";
+		var totalMessageCountStr = totalMessageCount?.Format() ?? "(...)";
+
+		FilterStatisticsText = verb + " " + exportedMessageCountStr + " out of " + totalMessageCountStr + " message" + (totalMessageCount is null or 1 ? "." : "s.");
+		OnPropertyChanged(nameof(FilterStatisticsText));
+	}
+
+	public async void OpenChannelFilterDialog() {
+		var servers = db.GetAllServers().ToDictionary(static server => server.Id);
+		var items = new List<CheckBoxItem<ulong>>();
+		var included = IncludedChannels;
+
+		foreach (var channel in db.GetAllChannels()) {
+			var channelId = channel.Id;
+			var channelName = channel.Name;
+
+			string title;
+			if (servers.TryGetValue(channel.Server, out var server)) {
+				var titleBuilder = new StringBuilder();
+				var serverType = server.Type;
+
+				titleBuilder.Append('[')
+				            .Append(ServerTypes.ToString(serverType))
+				            .Append("] ");
+
+				if (serverType == ServerType.DirectMessage) {
+					titleBuilder.Append(channelName);
+				}
+				else {
+					titleBuilder.Append(server.Name)
+					            .Append(" - ")
+					            .Append(channelName);
+				}
+
+				title = titleBuilder.ToString();
+			}
+			else {
+				title = channelName;
+			}
+
+			items.Add(new CheckBoxItem<ulong>(channelId) {
+				Title = title,
+				Checked = included.Contains(channelId)
+			});
+		}
+
+		var result = await OpenIdFilterDialog(window, "Included Channels", items);
+		if (result != null) {
+			IncludedChannels = result;
+		}
+	}
+
+	public async void OpenUserFilterDialog() {
+		var items = new List<CheckBoxItem<ulong>>();
+		var included = IncludedUsers;
+
+		foreach (var user in db.GetAllUsers()) {
+			var name = user.Name;
+			var discriminator = user.Discriminator;
+
+			items.Add(new CheckBoxItem<ulong>(user.Id) {
+				Title = discriminator == null ? name : name + " #" + discriminator,
+				Checked = included.Contains(user.Id)
+			});
+		}
+
+		var result = await OpenIdFilterDialog(window, "Included Users", items);
+		if (result != null) {
+			IncludedUsers = result;
+		}
+	}
+
+	private void UpdateChannelFilterLabel() {
+		long total = db.Statistics.TotalChannels;
+		long included = FilterByChannel ? IncludedChannels.Count : total;
+		ChannelFilterLabel = "Selected " + included.Format() + " / " + total.Pluralize("channel") + ".";
+	}
+
+	private void UpdateUserFilterLabel() {
+		long total = db.Statistics.TotalUsers;
+		long included = FilterByUser ? IncludedUsers.Count : total;
+		UserFilterLabel = "Selected " + included.Format() + " / " + total.Pluralize("user") + ".";
+	}
+
+	public MessageFilter CreateFilter() {
+		MessageFilter filter = new();
+
+		if (FilterByDate) {
+			filter.StartDate = StartDate;
+			filter.EndDate = EndDate?.AddDays(1).AddMilliseconds(-1);
+		}
+
+		if (FilterByChannel) {
+			filter.ChannelIds = new HashSet<ulong>(IncludedChannels);
+		}
+
+		if (FilterByUser) {
+			filter.UserIds = new HashSet<ulong>(IncludedUsers);
+		}
+
+		return filter;
+	}
+
+	private static async Task<HashSet<ulong>?> OpenIdFilterDialog(Window window, string title, List<CheckBoxItem<ulong>> items) {
+		items.Sort(static (item1, item2) => item1.Title.CompareTo(item2.Title));
+
+		var model = new CheckBoxDialogModel<ulong>(items) {
+			Title = title
+		};
+
+		var dialog = new CheckBoxDialog { DataContext = model };
+		var result = await dialog.ShowDialog<DialogResult.OkCancel>(window);
+
+		return result == DialogResult.OkCancel.Ok ? model.SelectedItems.Select(static item => item.Item).ToHashSet() : null;
+	}
 }

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

@@ -1,16 +1,11 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main.Controls {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class ServerConfigurationPanel : UserControl {
-		public ServerConfigurationPanel() {
-			InitializeComponent();
-		}
+namespace DHT.Desktop.Main.Controls;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class ServerConfigurationPanel : UserControl {
+	public ServerConfigurationPanel() {
+		InitializeComponent();
 	}
 }

app/Desktop/Main/Controls/ServerConfigurationPanelModel.cs

@@ -6,111 +6,111 @@ using DHT.Server.Database;
 using DHT.Server.Service;
 using DHT.Utils.Models;
 
-namespace DHT.Desktop.Main.Controls {
-	sealed class ServerConfigurationPanelModel : BaseModel, IDisposable {
-		private string inputPort;
+namespace DHT.Desktop.Main.Controls;
 
-		public string InputPort {
-			get => inputPort;
-			set {
-				Change(ref inputPort, value);
-				OnPropertyChanged(nameof(HasMadeChanges));
-			}
-		}
+sealed class ServerConfigurationPanelModel : BaseModel, IDisposable {
+	private string inputPort;
 
-		private string inputToken;
-
-		public string InputToken {
-			get => inputToken;
-			set {
-				Change(ref inputToken, value);
-				OnPropertyChanged(nameof(HasMadeChanges));
-			}
-		}
-
-		public bool HasMadeChanges => ServerManager.Port.ToString() != InputPort || ServerManager.Token != InputToken;
-
-		private bool isToggleServerButtonEnabled = true;
-
-		public bool IsToggleServerButtonEnabled {
-			get => isToggleServerButtonEnabled;
-			set => Change(ref isToggleServerButtonEnabled, value);
-		}
-
-		public string ToggleServerButtonText => serverManager.IsRunning ? "Stop Server" : "Start Server";
-
-		public event EventHandler<StatusBarModel.Status>? ServerStatusChanged;
-
-		private readonly Window window;
-		private readonly ServerManager serverManager;
-
-		[Obsolete("Designer")]
-		public ServerConfigurationPanelModel() : this(null!, new ServerManager(DummyDatabaseFile.Instance)) {}
-
-		public ServerConfigurationPanelModel(Window window, ServerManager serverManager) {
-			this.window = window;
-			this.serverManager = serverManager;
-			this.inputPort = ServerManager.Port.ToString();
-			this.inputToken = ServerManager.Token;
-		}
-
-		public void Initialize() {
-			ServerLauncher.ServerStatusChanged += ServerLauncherOnServerStatusChanged;
-		}
-
-		public void Dispose() {
-			ServerLauncher.ServerStatusChanged -= ServerLauncherOnServerStatusChanged;
-		}
-
-		private void ServerLauncherOnServerStatusChanged(object? sender, EventArgs e) {
-			ServerStatusChanged?.Invoke(this, serverManager.IsRunning ? StatusBarModel.Status.Ready : StatusBarModel.Status.Stopped);
-			OnPropertyChanged(nameof(ToggleServerButtonText));
-			IsToggleServerButtonEnabled = true;
-		}
-
-		private void BeforeServerStart() {
-			IsToggleServerButtonEnabled = false;
-			ServerStatusChanged?.Invoke(this, StatusBarModel.Status.Starting);
-		}
-
-		private void StartServer() {
-			BeforeServerStart();
-			serverManager.Launch();
-		}
-
-		private void StopServer() {
-			IsToggleServerButtonEnabled = false;
-			ServerStatusChanged?.Invoke(this, StatusBarModel.Status.Stopping);
-			serverManager.Stop();
-		}
-
-		public void OnClickToggleServerButton() {
-			if (serverManager.IsRunning) {
-				StopServer();
-			}
-			else {
-				StartServer();
-			}
-		}
-
-		public void OnClickRandomizeToken() {
-			InputToken = ServerUtils.GenerateRandomToken(20);
-		}
-
-		public async void OnClickApplyChanges() {
-			if (!ushort.TryParse(InputPort, out ushort port)) {
-				await Dialog.ShowOk(window, "Invalid Port", "Port must be a number between 0 and 65535.");
-				return;
-			}
-
-			BeforeServerStart();
-			serverManager.Relaunch(port, InputToken);
+	public string InputPort {
+		get => inputPort;
+		set {
+			Change(ref inputPort, value);
 			OnPropertyChanged(nameof(HasMadeChanges));
 		}
+	}
 
-		public void OnClickCancelChanges() {
-			InputPort = ServerManager.Port.ToString();
-			InputToken = ServerManager.Token;
+	private string inputToken;
+
+	public string InputToken {
+		get => inputToken;
+		set {
+			Change(ref inputToken, value);
+			OnPropertyChanged(nameof(HasMadeChanges));
 		}
 	}
+
+	public bool HasMadeChanges => ServerManager.Port.ToString() != InputPort || ServerManager.Token != InputToken;
+
+	private bool isToggleServerButtonEnabled = true;
+
+	public bool IsToggleServerButtonEnabled {
+		get => isToggleServerButtonEnabled;
+		set => Change(ref isToggleServerButtonEnabled, value);
+	}
+
+	public string ToggleServerButtonText => serverManager.IsRunning ? "Stop Server" : "Start Server";
+
+	public event EventHandler<StatusBarModel.Status>? ServerStatusChanged;
+
+	private readonly Window window;
+	private readonly ServerManager serverManager;
+
+	[Obsolete("Designer")]
+	public ServerConfigurationPanelModel() : this(null!, new ServerManager(DummyDatabaseFile.Instance)) {}
+
+	public ServerConfigurationPanelModel(Window window, ServerManager serverManager) {
+		this.window = window;
+		this.serverManager = serverManager;
+		this.inputPort = ServerManager.Port.ToString();
+		this.inputToken = ServerManager.Token;
+	}
+
+	public void Initialize() {
+		ServerLauncher.ServerStatusChanged += ServerLauncherOnServerStatusChanged;
+	}
+
+	public void Dispose() {
+		ServerLauncher.ServerStatusChanged -= ServerLauncherOnServerStatusChanged;
+	}
+
+	private void ServerLauncherOnServerStatusChanged(object? sender, EventArgs e) {
+		ServerStatusChanged?.Invoke(this, serverManager.IsRunning ? StatusBarModel.Status.Ready : StatusBarModel.Status.Stopped);
+		OnPropertyChanged(nameof(ToggleServerButtonText));
+		IsToggleServerButtonEnabled = true;
+	}
+
+	private void BeforeServerStart() {
+		IsToggleServerButtonEnabled = false;
+		ServerStatusChanged?.Invoke(this, StatusBarModel.Status.Starting);
+	}
+
+	private void StartServer() {
+		BeforeServerStart();
+		serverManager.Launch();
+	}
+
+	private void StopServer() {
+		IsToggleServerButtonEnabled = false;
+		ServerStatusChanged?.Invoke(this, StatusBarModel.Status.Stopping);
+		serverManager.Stop();
+	}
+
+	public void OnClickToggleServerButton() {
+		if (serverManager.IsRunning) {
+			StopServer();
+		}
+		else {
+			StartServer();
+		}
+	}
+
+	public void OnClickRandomizeToken() {
+		InputToken = ServerUtils.GenerateRandomToken(20);
+	}
+
+	public async void OnClickApplyChanges() {
+		if (!ushort.TryParse(InputPort, out ushort port)) {
+			await Dialog.ShowOk(window, "Invalid Port", "Port must be a number between 0 and 65535.");
+			return;
+		}
+
+		BeforeServerStart();
+		serverManager.Relaunch(port, InputToken);
+		OnPropertyChanged(nameof(HasMadeChanges));
+	}
+
+	public void OnClickCancelChanges() {
+		InputPort = ServerManager.Port.ToString();
+		InputToken = ServerManager.Token;
+	}
 }

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

@@ -1,16 +1,11 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main.Controls {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class StatusBar : UserControl {
-		public StatusBar() {
-			InitializeComponent();
-		}
+namespace DHT.Desktop.Main.Controls;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class StatusBar : UserControl {
+	public StatusBar() {
+		InitializeComponent();
 	}
 }

app/Desktop/Main/Controls/StatusBarModel.cs

@@ -2,44 +2,44 @@ using System;
 using DHT.Server.Database;
 using DHT.Utils.Models;
 
-namespace DHT.Desktop.Main.Controls {
-	sealed class StatusBarModel : BaseModel {
-		public DatabaseStatistics DatabaseStatistics { get; }
+namespace DHT.Desktop.Main.Controls;
 
-		private Status status = Status.Stopped;
+sealed class StatusBarModel : BaseModel {
+	public DatabaseStatistics DatabaseStatistics { get; }
 
-		public Status CurrentStatus {
-			get => status;
-			set {
-				status = value;
-				OnPropertyChanged(nameof(StatusText));
-			}
-		}
+	private Status status = Status.Stopped;
 
-		public string StatusText {
-			get {
-				return CurrentStatus switch {
-					Status.Starting => "STARTING",
-					Status.Ready    => "READY",
-					Status.Stopping => "STOPPING",
-					Status.Stopped  => "STOPPED",
-					_               => ""
-				};
-			}
-		}
-
-		[Obsolete("Designer")]
-		public StatusBarModel() : this(new DatabaseStatistics()) {}
-
-		public StatusBarModel(DatabaseStatistics databaseStatistics) {
-			this.DatabaseStatistics = databaseStatistics;
-		}
-
-		public enum Status {
-			Starting,
-			Ready,
-			Stopping,
-			Stopped
+	public Status CurrentStatus {
+		get => status;
+		set {
+			status = value;
+			OnPropertyChanged(nameof(StatusText));
 		}
 	}
+
+	public string StatusText {
+		get {
+			return CurrentStatus switch {
+				Status.Starting => "STARTING",
+				Status.Ready    => "READY",
+				Status.Stopping => "STOPPING",
+				Status.Stopped  => "STOPPED",
+				_               => ""
+			};
+		}
+	}
+
+	[Obsolete("Designer")]
+	public StatusBarModel() : this(new DatabaseStatistics()) {}
+
+	public StatusBarModel(DatabaseStatistics databaseStatistics) {
+		this.DatabaseStatistics = databaseStatistics;
+	}
+
+	public enum Status {
+		Starting,
+		Ready,
+		Stopping,
+		Stopped
+	}
 }

app/Desktop/Main/MainWindow.axaml.cs

@@ -1,44 +1,35 @@
 using System;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
-using Avalonia;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 using DHT.Desktop.Main.Pages;
 using JetBrains.Annotations;
 
-namespace DHT.Desktop.Main {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class MainWindow : Window {
-		[UsedImplicitly]
-		public MainWindow() {
-			InitializeComponent(Arguments.Empty);
+namespace DHT.Desktop.Main;
+
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class MainWindow : Window {
+	[UsedImplicitly]
+	public MainWindow() {
+		InitializeComponent();
+		DataContext = new MainWindowModel(this, Arguments.Empty);
+	}
+
+	internal MainWindow(Arguments args) {
+		InitializeComponent();
+		DataContext = new MainWindowModel(this, args);
+	}
+
+	public void OnClosed(object? sender, EventArgs e) {
+		if (DataContext is IDisposable disposable) {
+			disposable.Dispose();
 		}
 
-		internal MainWindow(Arguments args) {
-			InitializeComponent(args);
-		}
-
-		private void InitializeComponent(Arguments args) {
-			AvaloniaXamlLoader.Load(this);
-			DataContext = new MainWindowModel(this, args);
-
-			#if DEBUG
-			this.AttachDevTools();
-			#endif
-		}
-
-		public void OnClosed(object? sender, EventArgs e) {
-			if (DataContext is IDisposable disposable) {
-				disposable.Dispose();
-			}
-
-			foreach (var temporaryFile in ViewerPageModel.TemporaryFiles) {
-				try {
-					File.Delete(temporaryFile);
-				} catch (Exception) {
-					// ignored
-				}
+		foreach (var temporaryFile in ViewerPageModel.TemporaryFiles) {
+			try {
+				File.Delete(temporaryFile);
+			} catch (Exception) {
+				// ignored
 			}
 		}
 	}

app/Desktop/Main/MainWindowModel.cs

@@ -10,107 +10,107 @@ using DHT.Desktop.Server;
 using DHT.Server.Database;
 using DHT.Utils.Models;
 
-namespace DHT.Desktop.Main {
-	sealed class MainWindowModel : BaseModel, IDisposable {
-		private const string DefaultTitle = "Discord History Tracker";
+namespace DHT.Desktop.Main;
 
-		public string Title { get; private set; } = DefaultTitle;
+sealed class MainWindowModel : BaseModel, IDisposable {
+	private const string DefaultTitle = "Discord History Tracker";
 
-		public UserControl CurrentScreen { get; private set; }
-		
-		private readonly WelcomeScreen welcomeScreen;
-		private readonly WelcomeScreenModel welcomeScreenModel;
+	public string Title { get; private set; } = DefaultTitle;
 
-		private MainContentScreen? mainContentScreen;
-		private MainContentScreenModel? mainContentScreenModel;
+	public UserControl CurrentScreen { get; private set; }
 
-		private readonly Window window;
+	private readonly WelcomeScreen welcomeScreen;
+	private readonly WelcomeScreenModel welcomeScreenModel;
 
-		private IDatabaseFile? db;
+	private MainContentScreen? mainContentScreen;
+	private MainContentScreenModel? mainContentScreenModel;
 
-		[Obsolete("Designer")]
-		public MainWindowModel() : this(null!, Arguments.Empty) {}
+	private readonly Window window;
 
-		public MainWindowModel(Window window, Arguments args) {
-			this.window = window;
+	private IDatabaseFile? db;
 
-			welcomeScreenModel = new WelcomeScreenModel(window);
-			welcomeScreen = new WelcomeScreen { DataContext = welcomeScreenModel };
-			CurrentScreen = welcomeScreen;
+	[Obsolete("Designer")]
+	public MainWindowModel() : this(null!, Arguments.Empty) {}
 
-			welcomeScreenModel.PropertyChanged += WelcomeScreenModelOnPropertyChanged;
+	public MainWindowModel(Window window, Arguments args) {
+		this.window = window;
 
-			var dbFile = args.DatabaseFile;
-			if (!string.IsNullOrWhiteSpace(dbFile)) {
-				async void OnWindowOpened(object? o, EventArgs eventArgs) {
-					window.Opened -= OnWindowOpened;
+		welcomeScreenModel = new WelcomeScreenModel(window);
+		welcomeScreen = new WelcomeScreen { DataContext = welcomeScreenModel };
+		CurrentScreen = welcomeScreen;
 
-					// https://github.com/AvaloniaUI/Avalonia/issues/3071
-					if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
-						await Task.Delay(500);
-					}
+		welcomeScreenModel.PropertyChanged += WelcomeScreenModelOnPropertyChanged;
 
-					if (File.Exists(dbFile)) {
-						await welcomeScreenModel.OpenOrCreateDatabaseFromPath(dbFile);
-					}
-					else {
-						await Dialog.ShowOk(window, "Database Error", "Database file not found:\n" + dbFile);
-					}
+		var dbFile = args.DatabaseFile;
+		if (!string.IsNullOrWhiteSpace(dbFile)) {
+			async void OnWindowOpened(object? o, EventArgs eventArgs) {
+				window.Opened -= OnWindowOpened;
+
+				// https://github.com/AvaloniaUI/Avalonia/issues/3071
+				if (!RuntimeInformation.IsOSPlatform(OSPlatform.Windows)) {
+					await Task.Delay(500);
 				}
 
-				window.Opened += OnWindowOpened;
-			}
-
-			if (args.ServerPort != null) {
-				ServerManager.Port = args.ServerPort.Value;
-			}
-
-			if (args.ServerToken != null) {
-				ServerManager.Token = args.ServerToken;
-			}
-		}
-
-		private async void WelcomeScreenModelOnPropertyChanged(object? sender, PropertyChangedEventArgs e) {
-			if (e.PropertyName == nameof(welcomeScreenModel.Db)) {
-				if (mainContentScreenModel != null) {
-					mainContentScreenModel.DatabaseClosed -= MainContentScreenModelOnDatabaseClosed;
-					mainContentScreenModel.Dispose();
-				}
-
-				db?.Dispose();
-				db = welcomeScreenModel.Db;
-
-				if (db == null) {
-					Title = DefaultTitle;
-					mainContentScreenModel = null;
-					mainContentScreen = null;
-					CurrentScreen = welcomeScreen;
+				if (File.Exists(dbFile)) {
+					await welcomeScreenModel.OpenOrCreateDatabaseFromPath(dbFile);
 				}
 				else {
-					Title = Path.GetFileName(db.Path) + " - " + DefaultTitle;
-					mainContentScreenModel = new MainContentScreenModel(window, db);
-					await mainContentScreenModel.Initialize();
-					mainContentScreenModel.DatabaseClosed += MainContentScreenModelOnDatabaseClosed;
-					mainContentScreen = new MainContentScreen { DataContext = mainContentScreenModel };
-					CurrentScreen = mainContentScreen;
+					await Dialog.ShowOk(window, "Database Error", "Database file not found:\n" + dbFile);
 				}
-
-				OnPropertyChanged(nameof(CurrentScreen));
-				OnPropertyChanged(nameof(Title));
-
-				window.Focus();
 			}
+
+			window.Opened += OnWindowOpened;
 		}
 
-		private void MainContentScreenModelOnDatabaseClosed(object? sender, EventArgs e) {
-			welcomeScreenModel.CloseDatabase();
+		if (args.ServerPort != null) {
+			ServerManager.Port = args.ServerPort.Value;
 		}
 
-		public void Dispose() {
-			welcomeScreenModel.Dispose();
-			mainContentScreenModel?.Dispose();
-			db?.Dispose();
-			db = null;
+		if (args.ServerToken != null) {
+			ServerManager.Token = args.ServerToken;
 		}
 	}
+
+	private async void WelcomeScreenModelOnPropertyChanged(object? sender, PropertyChangedEventArgs e) {
+		if (e.PropertyName == nameof(welcomeScreenModel.Db)) {
+			if (mainContentScreenModel != null) {
+				mainContentScreenModel.DatabaseClosed -= MainContentScreenModelOnDatabaseClosed;
+				mainContentScreenModel.Dispose();
+			}
+
+			db?.Dispose();
+			db = welcomeScreenModel.Db;
+
+			if (db == null) {
+				Title = DefaultTitle;
+				mainContentScreenModel = null;
+				mainContentScreen = null;
+				CurrentScreen = welcomeScreen;
+			}
+			else {
+				Title = Path.GetFileName(db.Path) + " - " + DefaultTitle;
+				mainContentScreenModel = new MainContentScreenModel(window, db);
+				await mainContentScreenModel.Initialize();
+				mainContentScreenModel.DatabaseClosed += MainContentScreenModelOnDatabaseClosed;
+				mainContentScreen = new MainContentScreen { DataContext = mainContentScreenModel };
+				CurrentScreen = mainContentScreen;
+			}
+
+			OnPropertyChanged(nameof(CurrentScreen));
+			OnPropertyChanged(nameof(Title));
+
+			window.Focus();
+		}
+	}
+
+	private void MainContentScreenModelOnDatabaseClosed(object? sender, EventArgs e) {
+		welcomeScreenModel.CloseDatabase();
+	}
+
+	public void Dispose() {
+		welcomeScreenModel.Dispose();
+		mainContentScreenModel?.Dispose();
+		db?.Dispose();
+		db = null;
+	}
 }

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

@@ -1,16 +1,11 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main.Pages {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class AdvancedPage : UserControl {
-		public AdvancedPage() {
-			InitializeComponent();
-		}
+namespace DHT.Desktop.Main.Pages;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class AdvancedPage : UserControl {
+	public AdvancedPage() {
+		InitializeComponent();
 	}
 }

app/Desktop/Main/Pages/AdvancedPageModel.cs

@@ -6,34 +6,34 @@ using DHT.Desktop.Server;
 using DHT.Server.Database;
 using DHT.Utils.Models;
 
-namespace DHT.Desktop.Main.Pages {
-	sealed class AdvancedPageModel : BaseModel, IDisposable {
-		public ServerConfigurationPanelModel ServerConfigurationModel { get; }
+namespace DHT.Desktop.Main.Pages;
 
-		private readonly Window window;
-		private readonly IDatabaseFile db;
+sealed class AdvancedPageModel : BaseModel, IDisposable {
+	public ServerConfigurationPanelModel ServerConfigurationModel { get; }
 
-		[Obsolete("Designer")]
-		public AdvancedPageModel() : this(null!, DummyDatabaseFile.Instance, new ServerManager(DummyDatabaseFile.Instance)) {}
+	private readonly Window window;
+	private readonly IDatabaseFile db;
 
-		public AdvancedPageModel(Window window, IDatabaseFile db, ServerManager serverManager) {
-			this.window = window;
-			this.db = db;
+	[Obsolete("Designer")]
+	public AdvancedPageModel() : this(null!, DummyDatabaseFile.Instance, new ServerManager(DummyDatabaseFile.Instance)) {}
 
-			ServerConfigurationModel = new ServerConfigurationPanelModel(window, serverManager);
-		}
+	public AdvancedPageModel(Window window, IDatabaseFile db, ServerManager serverManager) {
+		this.window = window;
+		this.db = db;
 
-		public void Initialize() {
-			ServerConfigurationModel.Initialize();
-		}
+		ServerConfigurationModel = new ServerConfigurationPanelModel(window, serverManager);
+	}
 
-		public void Dispose() {
-			ServerConfigurationModel.Dispose();
-		}
+	public void Initialize() {
+		ServerConfigurationModel.Initialize();
+	}
 
-		public async void VacuumDatabase() {
-			db.Vacuum();
-			await Dialog.ShowOk(window, "Vacuum Database", "Done.");
-		}
+	public void Dispose() {
+		ServerConfigurationModel.Dispose();
+	}
+
+	public async void VacuumDatabase() {
+		db.Vacuum();
+		await Dialog.ShowOk(window, "Vacuum Database", "Done.");
 	}
 }

app/Desktop/Main/Pages/AttachmentsPage.axaml

@@ -38,7 +38,7 @@
         <controls:AttachmentFilterPanel DataContext="{Binding FilterModel}" IsEnabled="{Binding !DataContext.IsDownloading, RelativeSource={RelativeSource AncestorType=UserControl}}" />
         <StackPanel Orientation="Vertical" Spacing="12">
             <Expander Header="Download Status" IsExpanded="True">
-                <DataGrid Items="{Binding StatisticsRows}" AutoGenerateColumns="False" CanUserReorderColumns="False" CanUserResizeColumns="False" CanUserSortColumns="False" IsReadOnly="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, Converter={StaticResource NumberValueConverter}}" Width="*" CellStyleClasses="right" />

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

@@ -1,16 +1,11 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main.Pages {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class AttachmentsPage : UserControl {
-		public AttachmentsPage() {
-			InitializeComponent();
-		}
+namespace DHT.Desktop.Main.Pages;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class AttachmentsPage : UserControl {
+	public AttachmentsPage() {
+		InitializeComponent();
 	}
 }

app/Desktop/Main/Pages/AttachmentsPageModel.cs

@@ -1,6 +1,8 @@
 using System;
 using System.Collections.Generic;
 using System.ComponentModel;
+using System.Threading;
+using Avalonia.Threading;
 using DHT.Desktop.Common;
 using DHT.Desktop.Main.Controls;
 using DHT.Server.Data;
@@ -11,193 +13,193 @@ using DHT.Server.Download;
 using DHT.Utils.Models;
 using DHT.Utils.Tasks;
 
-namespace DHT.Desktop.Main.Pages {
-	sealed class AttachmentsPageModel : BaseModel, IDisposable {
-		private static readonly DownloadItemFilter EnqueuedItemFilter = new() {
-			IncludeStatuses = new HashSet<DownloadStatus> {
-				DownloadStatus.Enqueued
-			}
-		};
+namespace DHT.Desktop.Main.Pages;
 
-		private bool isThreadDownloadButtonEnabled = true;
-
-		public string ToggleDownloadButtonText => downloadThread == null ? "Start Downloading" : "Stop Downloading";
-
-		public bool IsToggleDownloadButtonEnabled {
-			get => isThreadDownloadButtonEnabled;
-			set => Change(ref isThreadDownloadButtonEnabled, value);
+sealed class AttachmentsPageModel : BaseModel, IDisposable {
+	private static readonly DownloadItemFilter EnqueuedItemFilter = new() {
+		IncludeStatuses = new HashSet<DownloadStatus> {
+			DownloadStatus.Enqueued
 		}
+	};
 
-		public string DownloadMessage { get; set; } = "";
-		public double DownloadProgress => allItemsCount is null or 0 ? 0.0 : 100.0 * doneItemsCount / allItemsCount.Value;
+	private bool isThreadDownloadButtonEnabled = true;
 
-		public AttachmentFilterPanelModel FilterModel { get; }
+	public string ToggleDownloadButtonText => downloadThread == null ? "Start Downloading" : "Stop Downloading";
 
-		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 bool IsToggleDownloadButtonEnabled {
+		get => isThreadDownloadButtonEnabled;
+		set => Change(ref isThreadDownloadButtonEnabled, value);
+	}
 
-		public List<StatisticsRow> StatisticsRows {
-			get {
-				return new List<StatisticsRow> {
-					statisticsEnqueued,
-					statisticsDownloaded,
-					statisticsFailed,
-					statisticsSkipped
-				};
-			}
-		}
+	public string DownloadMessage { get; set; } = "";
+	public double DownloadProgress => allItemsCount is null or 0 ? 0.0 : 100.0 * doneItemsCount / allItemsCount.Value;
 
-		public bool IsDownloading => downloadThread != null;
-		public bool HasFailedDownloads => statisticsFailed.Items > 0;
+	public AttachmentFilterPanelModel FilterModel { get; }
 
-		private readonly IDatabaseFile db;
-		private readonly AsyncValueComputer<DownloadStatusStatistics>.Single downloadStatisticsComputer;
-		private BackgroundDownloadThread? downloadThread;
+	private readonly StatisticsRow statisticsEnqueued = new ("Enqueued");
+	private readonly StatisticsRow statisticsDownloaded = new ("Downloaded");
+	private readonly StatisticsRow statisticsFailed = new ("Failed");
+	private readonly StatisticsRow statisticsSkipped = new ("Skipped");
 
-		private int doneItemsCount;
-		private int? allItemsCount;
-
-		public AttachmentsPageModel() : this(DummyDatabaseFile.Instance) {}
-
-		public AttachmentsPageModel(IDatabaseFile db) {
-			this.db = db;
-			this.FilterModel = new AttachmentFilterPanelModel(db);
-
-			this.downloadStatisticsComputer = AsyncValueComputer<DownloadStatusStatistics>.WithResultProcessor(UpdateStatistics).WithOutdatedResults().BuildWithComputer(db.GetDownloadStatusStatistics);
-			this.downloadStatisticsComputer.Recompute();
-
-			db.Statistics.PropertyChanged += OnDbStatisticsChanged;
-		}
-
-		public void Dispose() {
-			db.Statistics.PropertyChanged -= OnDbStatisticsChanged;
-
-			FilterModel.Dispose();
-			DisposeDownloadThread();
-		}
-
-		private void OnDbStatisticsChanged(object? sender, PropertyChangedEventArgs e) {
-			if (e.PropertyName == nameof(DatabaseStatistics.TotalAttachments)) {
-				if (IsDownloading) {
-					EnqueueDownloadItems();
-				}
-				else {
-					downloadStatisticsComputer.Recompute();
-				}
-			}
-			else if (e.PropertyName == nameof(DatabaseStatistics.TotalDownloads)) {
-				downloadStatisticsComputer.Recompute();
-			}
-		}
-
-		private void EnqueueDownloadItems() {
-			var filter = FilterModel.CreateFilter();
-			filter.DownloadItemRule = AttachmentFilter.DownloadItemRules.OnlyNotPresent;
-			db.EnqueueDownloadItems(filter);
-
-			downloadStatisticsComputer.Recompute();
-		}
-
-		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));
-			}
-
-			allItemsCount = doneItemsCount + statisticsEnqueued.Items;
-			UpdateDownloadMessage();
-		}
-
-		private void UpdateDownloadMessage() {
-			DownloadMessage = IsDownloading ? doneItemsCount.Format() + " / " + (allItemsCount?.Format() ?? "?") : "";
-
-			OnPropertyChanged(nameof(DownloadMessage));
-			OnPropertyChanged(nameof(DownloadProgress));
-		}
-
-		private void DownloadThreadOnOnItemFinished(object? sender, DownloadItem e) {
-			++doneItemsCount;
-
-			UpdateDownloadMessage();
-			downloadStatisticsComputer.Recompute();
-		}
-
-		private void DownloadThreadOnOnServerStopped(object? sender, EventArgs e) {
-			downloadStatisticsComputer.Recompute();
-			IsToggleDownloadButtonEnabled = true;
-		}
-
-		public void OnClickToggleDownload() {
-			if (downloadThread == null) {
-				EnqueueDownloadItems();
-				downloadThread = new BackgroundDownloadThread(db);
-				downloadThread.OnItemFinished += DownloadThreadOnOnItemFinished;
-				downloadThread.OnServerStopped += DownloadThreadOnOnServerStopped;
-			}
-			else {
-				IsToggleDownloadButtonEnabled = false;
-				DisposeDownloadThread();
-
-				db.RemoveDownloadItems(EnqueuedItemFilter, FilterRemovalMode.RemoveMatching);
-				
-				doneItemsCount = 0;
-				allItemsCount = null;
-				UpdateDownloadMessage();
-			}
-
-			OnPropertyChanged(nameof(ToggleDownloadButtonText));
-			OnPropertyChanged(nameof(IsDownloading));
-		}
-
-		public void OnClickRetryFailedDownloads() {
-			var allExceptFailedFilter = new DownloadItemFilter {
-				IncludeStatuses = new HashSet<DownloadStatus> {
-					DownloadStatus.Enqueued,
-					DownloadStatus.Success
-				}
+	public List<StatisticsRow> StatisticsRows {
+		get {
+			return new List<StatisticsRow> {
+				statisticsEnqueued,
+				statisticsDownloaded,
+				statisticsFailed,
+				statisticsSkipped
 			};
+		}
+	}
 
-			db.RemoveDownloadItems(allExceptFailedFilter, FilterRemovalMode.KeepMatching);
+	public bool IsDownloading => downloadThread != null;
+	public bool HasFailedDownloads => statisticsFailed.Items > 0;
 
+	private readonly IDatabaseFile db;
+	private readonly AsyncValueComputer<DownloadStatusStatistics>.Single downloadStatisticsComputer;
+	private BackgroundDownloadThread? downloadThread;
+
+	private int doneItemsCount;
+	private int? allItemsCount;
+
+	public AttachmentsPageModel() : this(DummyDatabaseFile.Instance) {}
+
+	public AttachmentsPageModel(IDatabaseFile db) {
+		this.db = db;
+		this.FilterModel = new AttachmentFilterPanelModel(db);
+
+		this.downloadStatisticsComputer = AsyncValueComputer<DownloadStatusStatistics>.WithResultProcessor(UpdateStatistics).WithOutdatedResults().BuildWithComputer(db.GetDownloadStatusStatistics);
+		this.downloadStatisticsComputer.Recompute();
+
+		db.Statistics.PropertyChanged += OnDbStatisticsChanged;
+	}
+
+	public void Dispose() {
+		db.Statistics.PropertyChanged -= OnDbStatisticsChanged;
+
+		FilterModel.Dispose();
+		DisposeDownloadThread();
+	}
+
+	private void OnDbStatisticsChanged(object? sender, PropertyChangedEventArgs e) {
+		if (e.PropertyName == nameof(DatabaseStatistics.TotalAttachments)) {
 			if (IsDownloading) {
 				EnqueueDownloadItems();
 			}
+			else {
+				downloadStatisticsComputer.Recompute();
+			}
+		}
+		else if (e.PropertyName == nameof(DatabaseStatistics.TotalDownloads)) {
+			downloadStatisticsComputer.Recompute();
+		}
+	}
+
+	private void EnqueueDownloadItems() {
+		var filter = FilterModel.CreateFilter();
+		filter.DownloadItemRule = AttachmentFilter.DownloadItemRules.OnlyNotPresent;
+		db.EnqueueDownloadItems(filter);
+
+		downloadStatisticsComputer.Recompute();
+	}
+
+	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));
 		}
 
-		private void DisposeDownloadThread() {
-			if (downloadThread != null) {
-				downloadThread.OnItemFinished -= DownloadThreadOnOnItemFinished;
-				downloadThread.StopThread();
-			}
+		allItemsCount = doneItemsCount + statisticsEnqueued.Items;
+		UpdateDownloadMessage();
+	}
 
-			downloadThread = null;
+	private void UpdateDownloadMessage() {
+		DownloadMessage = IsDownloading ? doneItemsCount.Format() + " / " + (allItemsCount?.Format() ?? "?") : "";
+
+		OnPropertyChanged(nameof(DownloadMessage));
+		OnPropertyChanged(nameof(DownloadProgress));
+	}
+
+	private void DownloadThreadOnOnItemFinished(object? sender, DownloadItem e) {
+		Interlocked.Increment(ref doneItemsCount);
+
+		Dispatcher.UIThread.Invoke(UpdateDownloadMessage);
+		downloadStatisticsComputer.Recompute();
+	}
+
+	private void DownloadThreadOnOnServerStopped(object? sender, EventArgs e) {
+		downloadStatisticsComputer.Recompute();
+		IsToggleDownloadButtonEnabled = true;
+	}
+
+	public void OnClickToggleDownload() {
+		if (downloadThread == null) {
+			EnqueueDownloadItems();
+			downloadThread = new BackgroundDownloadThread(db);
+			downloadThread.OnItemFinished += DownloadThreadOnOnItemFinished;
+			downloadThread.OnServerStopped += DownloadThreadOnOnServerStopped;
+		}
+		else {
+			IsToggleDownloadButtonEnabled = false;
+			DisposeDownloadThread();
+
+			db.RemoveDownloadItems(EnqueuedItemFilter, FilterRemovalMode.RemoveMatching);
+
+			doneItemsCount = 0;
+			allItemsCount = null;
+			UpdateDownloadMessage();
 		}
 
-		public sealed class StatisticsRow {
-			public string State { get; }
-			public int Items { get; set; }
-			public ulong? Size { get; set; }
+		OnPropertyChanged(nameof(ToggleDownloadButtonText));
+		OnPropertyChanged(nameof(IsDownloading));
+	}
 
-			public StatisticsRow(string state) {
-				State = state;
+	public void OnClickRetryFailedDownloads() {
+		var allExceptFailedFilter = new DownloadItemFilter {
+			IncludeStatuses = new HashSet<DownloadStatus> {
+				DownloadStatus.Enqueued,
+				DownloadStatus.Success
 			}
+		};
+
+		db.RemoveDownloadItems(allExceptFailedFilter, FilterRemovalMode.KeepMatching);
+
+		if (IsDownloading) {
+			EnqueueDownloadItems();
+		}
+	}
+
+	private void DisposeDownloadThread() {
+		if (downloadThread != null) {
+			downloadThread.OnItemFinished -= DownloadThreadOnOnItemFinished;
+			downloadThread.StopThread();
+		}
+
+		downloadThread = null;
+	}
+
+	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/DatabasePage.axaml.cs

@@ -1,16 +1,11 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main.Pages {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class DatabasePage : UserControl {
-		public DatabasePage() {
-			InitializeComponent();
-		}
+namespace DHT.Desktop.Main.Pages;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class DatabasePage : UserControl {
+	public DatabasePage() {
+		InitializeComponent();
 	}
 }

app/Desktop/Main/Pages/DatabasePageModel.cs

@@ -7,8 +7,10 @@ using System.Text;
 using System.Threading;
 using System.Threading.Tasks;
 using Avalonia.Controls;
+using Avalonia.Platform.Storage;
 using Avalonia.Threading;
 using DHT.Desktop.Common;
+using DHT.Desktop.Dialogs.File;
 using DHT.Desktop.Dialogs.Message;
 using DHT.Desktop.Dialogs.Progress;
 using DHT.Desktop.Dialogs.TextBox;
@@ -18,231 +20,226 @@ using DHT.Server.Database.Import;
 using DHT.Utils.Logging;
 using DHT.Utils.Models;
 
-namespace DHT.Desktop.Main.Pages {
-	sealed class DatabasePageModel : BaseModel {
-		private static readonly Log Log = Log.ForType<DatabasePageModel>();
+namespace DHT.Desktop.Main.Pages; 
 
-		public IDatabaseFile Db { get; }
+sealed class DatabasePageModel : BaseModel {
+	private static readonly Log Log = Log.ForType<DatabasePageModel>();
 
-		public event EventHandler? DatabaseClosed;
+	public IDatabaseFile Db { get; }
 
-		private readonly Window window;
+	public event EventHandler? DatabaseClosed;
 
-		[Obsolete("Designer")]
-		public DatabasePageModel() : this(null!, DummyDatabaseFile.Instance) {}
+	private readonly Window window;
 
-		public DatabasePageModel(Window window, IDatabaseFile db) {
-			this.window = window;
-			this.Db = db;
+	[Obsolete("Designer")]
+	public DatabasePageModel() : this(null!, DummyDatabaseFile.Instance) {}
+
+	public DatabasePageModel(Window window, IDatabaseFile db) {
+		this.window = window;
+		this.Db = db;
+	}
+
+	public async void OpenDatabaseFolder() {
+		string file = Db.Path;
+		string? folder = Path.GetDirectoryName(file);
+
+		if (folder == null) {
+			return;
 		}
 
-		public async void OpenDatabaseFolder() {
-			string file = Db.Path;
-			string? folder = Path.GetDirectoryName(file);
+		switch (Environment.OSVersion.Platform) {
+			case PlatformID.Win32NT:
+				Process.Start("explorer.exe", "/select,\"" + file + "\"");
+				break;
 
-			if (folder == null) {
-				return;
-			}
+			case PlatformID.Unix:
+				Process.Start("xdg-open", new string[] { folder });
+				break;
 
-			switch (Environment.OSVersion.Platform) {
-				case PlatformID.Win32NT:
-					Process.Start("explorer.exe", "/select,\"" + file + "\"");
-					break;
+			case PlatformID.MacOSX:
+				Process.Start("open", new string[] { folder });
+				break;
 
-				case PlatformID.Unix:
-					Process.Start("xdg-open", new string[] { folder });
-					break;
-
-				case PlatformID.MacOSX:
-					Process.Start("open", new string[] { folder });
-					break;
-
-				default:
-					await Dialog.ShowOk(window, "Feature Not Supported", "This feature is not supported for your operating system.");
-					break;
-			}
-		}
-
-		public void CloseDatabase() {
-			DatabaseClosed?.Invoke(this, EventArgs.Empty);
-		}
-
-		public async void MergeWithDatabase() {
-			var fileDialog = DatabaseGui.NewOpenDatabaseFileDialog();
-			fileDialog.Directory = Path.GetDirectoryName(Db.Path);
-			fileDialog.AllowMultiple = true;
-
-			string[]? paths = await fileDialog.ShowAsync(window);
-			if (paths == null || paths.Length == 0) {
-				return;
-			}
-
-			ProgressDialog progressDialog = new ProgressDialog();
-			progressDialog.DataContext = new ProgressDialogModel(async callback => await MergeWithDatabaseFromPaths(Db, paths, progressDialog, callback)) {
-				Title = "Database Merge"
-			};
-
-			await progressDialog.ShowDialog(window);
-		}
-
-		private static async Task MergeWithDatabaseFromPaths(IDatabaseFile target, string[] paths, ProgressDialog dialog, IProgressCallback callback) {
-			int total = paths.Length;
-
-			DialogResult.YesNo? upgradeResult = null;
-
-			async Task<bool> CheckCanUpgradeDatabase() {
-				upgradeResult ??= total > 1
-					                  ? await DatabaseGui.ShowCanUpgradeMultipleDatabaseDialog(dialog)
-					                  : await DatabaseGui.ShowCanUpgradeDatabaseDialog(dialog);
-
-				return DialogResult.YesNo.Yes == upgradeResult;
-			}
-
-			await PerformImport(target, paths, dialog, callback, "Database Merge", "Database Error", "database file", async path => {
-				SynchronizationContext? prevSyncContext = SynchronizationContext.Current;
-				SynchronizationContext.SetSynchronizationContext(new AvaloniaSynchronizationContext());
-				IDatabaseFile? db = await DatabaseGui.TryOpenOrCreateDatabaseFromPath(path, dialog, CheckCanUpgradeDatabase);
-				SynchronizationContext.SetSynchronizationContext(prevSyncContext);
-
-				if (db == null) {
-					return false;
-				}
-
-				try {
-					target.AddFrom(db);
-					return true;
-				} finally {
-					db.Dispose();
-				}
-			});
-		}
-
-		public async void ImportLegacyArchive() {
-			var fileDialog = new OpenFileDialog {
-				Title = "Open Legacy DHT Archive",
-				Directory = Path.GetDirectoryName(Db.Path),
-				AllowMultiple = true
-			};
-
-			string[]? paths = await fileDialog.ShowAsync(window);
-			if (paths == null || paths.Length == 0) {
-				return;
-			}
-
-			ProgressDialog progressDialog = new ProgressDialog();
-			progressDialog.DataContext = new ProgressDialogModel(async callback => await ImportLegacyArchiveFromPaths(Db, paths, progressDialog, callback)) {
-				Title = "Legacy Archive Import"
-			};
-
-			await progressDialog.ShowDialog(window);
-		}
-
-		private static async Task ImportLegacyArchiveFromPaths(IDatabaseFile target, string[] paths, ProgressDialog dialog, IProgressCallback callback) {
-			var fakeSnowflake = new FakeSnowflake();
-
-			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());
-					Dictionary<DHT.Server.Data.Server, ulong>? result = await Dispatcher.UIThread.InvokeAsync(() => AskForServerIds(dialog, servers));
-					SynchronizationContext.SetSynchronizationContext(prevSyncContext);
-					return result;
-				});
-			});
-		}
-
-		private static async Task<Dictionary<DHT.Server.Data.Server, ulong>?> AskForServerIds(Window window, DHT.Server.Data.Server[] servers) {
-			static bool IsValidSnowflake(string value) {
-				return string.IsNullOrEmpty(value) || ulong.TryParse(value, out _);
-			}
-			
-			var items = new List<TextBoxItem<DHT.Server.Data.Server>>();
-
-			foreach (var server in servers.OrderBy(static server => server.Type).ThenBy(static server => server.Name)) {
-				items.Add(new TextBoxItem<DHT.Server.Data.Server>(server) {
-					Title = server.Name + " (" + ServerTypes.ToNiceString(server.Type) + ")",
-					ValidityCheck = IsValidSnowflake
-				});
-			}
-
-			var model = new TextBoxDialogModel<DHT.Server.Data.Server>(items) {
-				Title = "Imported Server IDs",
-				Description = "Please fill in the IDs of servers and direct messages. First enable Developer Mode in Discord, then right-click each server or direct message, click 'Copy ID', and paste it into the input field. If a server no longer exists, leave its input field empty to use a random ID."
-			};
-
-			var dialog = new TextBoxDialog { DataContext = model };
-			var result = await dialog.ShowDialog<DialogResult.OkCancel>(window);
-
-			if (result != DialogResult.OkCancel.Ok) {
-				return null;
-			}
-
-			return model.ValidItems
-			            .Where(static item => !string.IsNullOrEmpty(item.Value))
-			            .ToDictionary(static item => item.Item, static item => ulong.Parse(item.Value));
-		}
-
-		private static async Task 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 = target.SnapshotStatistics();
-
-			int successful = 0;
-			int finished = 0;
-
-			foreach (string path in paths) {
-				await callback.Update(Path.GetFileName(path), finished, total);
-				++finished;
-
-				if (!File.Exists(path)) {
-					await Dialog.ShowOk(dialog, errorDialogTitle, "File '" + Path.GetFileName(path) + "' no longer exists.");
-					continue;
-				}
-
-				try {
-					if (await performImport(path)) {
-						++successful;
-					}
-				} catch (Exception ex) {
-					Log.Error(ex);
-					await Dialog.ShowOk(dialog, errorDialogTitle, "File '" + Path.GetFileName(path) + "' could not be imported: " + ex.Message);
-				}
-			}
-
-			await callback.Update("Done", finished, total);
-
-			if (successful == 0) {
-				await Dialog.ShowOk(dialog, neutralDialogTitle, "Nothing was imported.");
-				return;
-			}
-
-			await Dialog.ShowOk(dialog, neutralDialogTitle, GetImportDialogMessage(oldStatistics, target.SnapshotStatistics(), 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;
-
-			StringBuilder message = new StringBuilder();
-			message.Append("Processed ");
-
-			if (successfulItems == totalItems) {
-				message.Append(successfulItems.Pluralize(itemName));
-			}
-			else {
-				message.Append(successfulItems.Format()).Append(" out of ").Append(totalItems.Pluralize(itemName));
-			}
-
-			message.Append(" and added:\n\n  \u2022 ");
-			message.Append(newServers.Pluralize("server")).Append("\n  \u2022 ");
-			message.Append(newChannels.Pluralize("channel")).Append("\n  \u2022 ");
-			message.Append(newUsers.Pluralize("user")).Append("\n  \u2022 ");
-			message.Append(newMessages.Pluralize("message"));
-
-			return message.ToString();
+			default:
+				await Dialog.ShowOk(window, "Feature Not Supported", "This feature is not supported for your operating system.");
+				break;
 		}
 	}
+
+	public void CloseDatabase() {
+		DatabaseClosed?.Invoke(this, EventArgs.Empty);
+	}
+
+	public async void MergeWithDatabase() {
+		var paths = await DatabaseGui.NewOpenDatabaseFilesDialog(window, Path.GetDirectoryName(Db.Path));
+		if (paths.Length == 0) {
+			return;
+		}
+
+		ProgressDialog progressDialog = new ProgressDialog();
+		progressDialog.DataContext = new ProgressDialogModel(async callback => await MergeWithDatabaseFromPaths(Db, paths, progressDialog, callback)) {
+			Title = "Database Merge"
+		};
+
+		await progressDialog.ShowDialog(window);
+	}
+
+	private static async Task MergeWithDatabaseFromPaths(IDatabaseFile target, string[] paths, ProgressDialog dialog, IProgressCallback callback) {
+		int total = paths.Length;
+
+		DialogResult.YesNo? upgradeResult = null;
+
+		async Task<bool> CheckCanUpgradeDatabase() {
+			upgradeResult ??= total > 1
+				                  ? await DatabaseGui.ShowCanUpgradeMultipleDatabaseDialog(dialog)
+				                  : await DatabaseGui.ShowCanUpgradeDatabaseDialog(dialog);
+
+			return DialogResult.YesNo.Yes == upgradeResult;
+		}
+
+		await PerformImport(target, paths, dialog, callback, "Database Merge", "Database Error", "database file", async path => {
+			SynchronizationContext? prevSyncContext = SynchronizationContext.Current;
+			SynchronizationContext.SetSynchronizationContext(new AvaloniaSynchronizationContext());
+			IDatabaseFile? db = await DatabaseGui.TryOpenOrCreateDatabaseFromPath(path, dialog, CheckCanUpgradeDatabase);
+			SynchronizationContext.SetSynchronizationContext(prevSyncContext);
+
+			if (db == null) {
+				return false;
+			}
+
+			try {
+				target.AddFrom(db);
+				return true;
+			} finally {
+				db.Dispose();
+			}
+		});
+	}
+
+	public async void ImportLegacyArchive() {
+		var paths = await window.StorageProvider.OpenFiles(new FilePickerOpenOptions {
+			Title = "Open Legacy DHT Archive",
+			SuggestedStartLocation = await FileDialogs.GetSuggestedStartLocation(window, Path.GetDirectoryName(Db.Path)),
+			AllowMultiple = true
+		});
+			
+		if (paths.Length == 0) {
+			return;
+		}
+
+		ProgressDialog progressDialog = new ProgressDialog();
+		progressDialog.DataContext = new ProgressDialogModel(async callback => await ImportLegacyArchiveFromPaths(Db, paths, progressDialog, callback)) {
+			Title = "Legacy Archive Import"
+		};
+
+		await progressDialog.ShowDialog(window);
+	}
+
+	private static async Task ImportLegacyArchiveFromPaths(IDatabaseFile target, string[] paths, ProgressDialog dialog, IProgressCallback callback) {
+		var fakeSnowflake = new FakeSnowflake();
+
+		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());
+				Dictionary<DHT.Server.Data.Server, ulong>? result = await Dispatcher.UIThread.InvokeAsync(() => AskForServerIds(dialog, servers));
+				SynchronizationContext.SetSynchronizationContext(prevSyncContext);
+				return result;
+			});
+		});
+	}
+
+	private static async Task<Dictionary<DHT.Server.Data.Server, ulong>?> AskForServerIds(Window window, DHT.Server.Data.Server[] servers) {
+		static bool IsValidSnowflake(string value) {
+			return string.IsNullOrEmpty(value) || ulong.TryParse(value, out _);
+		}
+			
+		var items = new List<TextBoxItem<DHT.Server.Data.Server>>();
+
+		foreach (var server in servers.OrderBy(static server => server.Type).ThenBy(static server => server.Name)) {
+			items.Add(new TextBoxItem<DHT.Server.Data.Server>(server) {
+				Title = server.Name + " (" + ServerTypes.ToNiceString(server.Type) + ")",
+				ValidityCheck = IsValidSnowflake
+			});
+		}
+
+		var model = new TextBoxDialogModel<DHT.Server.Data.Server>(items) {
+			Title = "Imported Server IDs",
+			Description = "Please fill in the IDs of servers and direct messages. First enable Developer Mode in Discord, then right-click each server or direct message, click 'Copy ID', and paste it into the input field. If a server no longer exists, leave its input field empty to use a random ID."
+		};
+
+		var dialog = new TextBoxDialog { DataContext = model };
+		var result = await dialog.ShowDialog<DialogResult.OkCancel>(window);
+
+		if (result != DialogResult.OkCancel.Ok) {
+			return null;
+		}
+
+		return model.ValidItems
+		            .Where(static item => !string.IsNullOrEmpty(item.Value))
+		            .ToDictionary(static item => item.Item, static item => ulong.Parse(item.Value));
+	}
+
+	private static async Task 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 = target.SnapshotStatistics();
+
+		int successful = 0;
+		int finished = 0;
+
+		foreach (string path in paths) {
+			await callback.Update(Path.GetFileName(path), finished, total);
+			++finished;
+
+			if (!File.Exists(path)) {
+				await Dialog.ShowOk(dialog, errorDialogTitle, "File '" + Path.GetFileName(path) + "' no longer exists.");
+				continue;
+			}
+
+			try {
+				if (await performImport(path)) {
+					++successful;
+				}
+			} catch (Exception ex) {
+				Log.Error(ex);
+				await Dialog.ShowOk(dialog, errorDialogTitle, "File '" + Path.GetFileName(path) + "' could not be imported: " + ex.Message);
+			}
+		}
+
+		await callback.Update("Done", finished, total);
+
+		if (successful == 0) {
+			await Dialog.ShowOk(dialog, neutralDialogTitle, "Nothing was imported.");
+			return;
+		}
+
+		await Dialog.ShowOk(dialog, neutralDialogTitle, GetImportDialogMessage(oldStatistics, target.SnapshotStatistics(), 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;
+
+		StringBuilder message = new StringBuilder();
+		message.Append("Processed ");
+
+		if (successfulItems == totalItems) {
+			message.Append(successfulItems.Pluralize(itemName));
+		}
+		else {
+			message.Append(successfulItems.Format()).Append(" out of ").Append(totalItems.Pluralize(itemName));
+		}
+
+		message.Append(" and added:\n\n  \u2022 ");
+		message.Append(newServers.Pluralize("server")).Append("\n  \u2022 ");
+		message.Append(newChannels.Pluralize("channel")).Append("\n  \u2022 ");
+		message.Append(newUsers.Pluralize("user")).Append("\n  \u2022 ");
+		message.Append(newMessages.Pluralize("message"));
+
+		return message.ToString();
+	}
 }

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

@@ -1,16 +1,11 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main.Pages {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class DebugPage : UserControl {
-		public DebugPage() {
-			InitializeComponent();
-		}
+namespace DHT.Desktop.Main.Pages;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class DebugPage : UserControl {
+	public DebugPage() {
+		InitializeComponent();
 	}
 }

app/Desktop/Main/Pages/DebugPageModel.cs

@@ -52,9 +52,9 @@ namespace DHT.Desktop.Main.Pages {
 
 			await progressDialog.ShowDialog(window);
 		}
-		
+
 		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);
@@ -63,7 +63,7 @@ namespace DHT.Desktop.Main.Pages {
 			var server = new DHT.Server.Data.Server {
 				Id = RandomId(rand),
 				Name = RandomName("s"),
-				Type = ServerType.Server
+				Type = ServerType.Server,
 			};
 
 			var channels = Enumerable.Range(0, channelCount).Select(i => new Channel {
@@ -73,36 +73,36 @@ namespace DHT.Desktop.Main.Pages {
 				ParentId = null,
 				Position = i,
 				Topic = RandomText(rand, 10),
-				Nsfw = rand.Next(4) == 0
+				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()
+				Discriminator = rand.Next(0, 9999).ToString(),
 			}).ToArray();
-			
+
 			db.AddServer(server);
 			db.AddUsers(users);
-			
+
 			foreach (var channel in channels) {
 				db.AddChannel(channel);
 			}
-			
+
 			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 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,
@@ -113,12 +113,12 @@ namespace DHT.Desktop.Main.Pages {
 						RepliedToId = null,
 						Attachments = ImmutableArray<Attachment>.Empty,
 						Embeds = ImmutableArray<Embed>.Empty,
-						Reactions = ImmutableArray<Reaction>.Empty
+						Reactions = ImmutableArray<Reaction>.Empty,
 					};
 				}).ToArray();
-				
+
 				db.AddMessages(messages);
-				
+
 				messageCount -= BatchSize;
 				await callback.Update("Adding messages in batches of " + BatchSize, ++batchIndex, batchCount);
 			}
@@ -161,9 +161,9 @@ namespace DHT.Desktop.Main.Pages {
 			"vanilla",
 			"watercress", "watermelon",
 			"yam",
-			"zucchini"
+			"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)]));

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

@@ -3,35 +3,29 @@ using System.Diagnostics.CodeAnalysis;
 using System.Threading.Tasks;
 using Avalonia.Controls;
 using Avalonia.Interactivity;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main.Pages {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class TrackingPage : UserControl {
-		private bool isCopyingScript;
+namespace DHT.Desktop.Main.Pages;
 
-		public TrackingPage() {
-			InitializeComponent();
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class TrackingPage : UserControl {
+	private bool isCopyingScript;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+	public TrackingPage() {
+		InitializeComponent();
+	}
 
-		public async void CopyTrackingScriptButton_OnClick(object? sender, RoutedEventArgs e) {
-			if (DataContext is TrackingPageModel model) {
-				var button = this.FindControl<Button>("CopyTrackingScript");
-				var originalText = button.Content;
-				button.MinWidth = button.Bounds.Width;
+	public async void CopyTrackingScriptButton_OnClick(object? sender, RoutedEventArgs e) {
+		if (DataContext is TrackingPageModel model) {
+			var originalText = CopyTrackingScript.Content;
+			CopyTrackingScript.MinWidth = CopyTrackingScript.Bounds.Width;
 
-				if (await model.OnClickCopyTrackingScript() && !isCopyingScript) {
-					isCopyingScript = true;
-					button.Content = "Script Copied!";
+			if (await model.OnClickCopyTrackingScript() && !isCopyingScript) {
+				isCopyingScript = true;
+				CopyTrackingScript.Content = "Script Copied!";
 
-					await Task.Delay(TimeSpan.FromSeconds(2));
-					button.Content = originalText;
-					isCopyingScript = false;
-				}
+				await Task.Delay(TimeSpan.FromSeconds(2));
+				CopyTrackingScript.Content = originalText;
+				isCopyingScript = false;
 			}
 		}
 	}

app/Desktop/Main/Pages/TrackingPageModel.cs

@@ -1,7 +1,6 @@
 using System;
 using System.Threading.Tasks;
 using System.Web;
-using Avalonia;
 using Avalonia.Controls;
 using DHT.Desktop.Dialogs.Message;
 using DHT.Desktop.Discord;
@@ -9,109 +8,109 @@ using DHT.Desktop.Server;
 using DHT.Utils.Models;
 using static DHT.Desktop.Program;
 
-namespace DHT.Desktop.Main.Pages {
-	sealed class TrackingPageModel : BaseModel {
-		private bool areDevToolsEnabled;
+namespace DHT.Desktop.Main.Pages;
 
-		private bool AreDevToolsEnabled {
-			get => areDevToolsEnabled;
-			set {
-				Change(ref areDevToolsEnabled, value);
-				OnPropertyChanged(nameof(ToggleAppDevToolsButtonText));
+sealed class TrackingPageModel : BaseModel {
+	private bool areDevToolsEnabled;
+
+	private bool AreDevToolsEnabled {
+		get => areDevToolsEnabled;
+		set {
+			Change(ref areDevToolsEnabled, value);
+			OnPropertyChanged(nameof(ToggleAppDevToolsButtonText));
+		}
+	}
+
+	public bool IsToggleAppDevToolsButtonEnabled { get; private set; } = true;
+
+	public string ToggleAppDevToolsButtonText {
+		get {
+			if (!IsToggleAppDevToolsButtonEnabled) {
+				return "Unavailable";
 			}
+
+			return AreDevToolsEnabled ? "Disable Ctrl+Shift+I" : "Enable Ctrl+Shift+I";
+		}
+	}
+
+	private readonly Window window;
+
+	[Obsolete("Designer")]
+	public TrackingPageModel() : this(null!) {}
+
+	public TrackingPageModel(Window window) {
+		this.window = window;
+	}
+
+	public async Task Initialize() {
+		bool? devToolsEnabled = await DiscordAppSettings.AreDevToolsEnabled();
+		if (devToolsEnabled.HasValue) {
+			AreDevToolsEnabled = devToolsEnabled.Value;
+		}
+		else {
+			IsToggleAppDevToolsButtonEnabled = false;
+			OnPropertyChanged(nameof(IsToggleAppDevToolsButtonEnabled));
+		}
+	}
+
+	public async Task<bool> OnClickCopyTrackingScript() {
+		string bootstrap = await Resources.ReadTextAsync("Tracker/bootstrap.js");
+		string script = bootstrap.Replace("= 0; /*[PORT]*/", "= " + ServerManager.Port + ";")
+		                         .Replace("/*[TOKEN]*/", HttpUtility.JavaScriptStringEncode(ServerManager.Token))
+		                         .Replace("/*[IMPORTS]*/", await Resources.ReadJoinedAsync("Tracker/scripts/", '\n'))
+		                         .Replace("/*[CSS-CONTROLLER]*/", await Resources.ReadTextAsync("Tracker/styles/controller.css"))
+		                         .Replace("/*[CSS-SETTINGS]*/", await Resources.ReadTextAsync("Tracker/styles/settings.css"));
+
+		var clipboard = window.Clipboard;
+		if (clipboard == null) {
+			await Dialog.ShowOk(window, "Copy Tracking Script", "Clipboard is not available on this system.");
+			return false;
 		}
 
-		public bool IsToggleAppDevToolsButtonEnabled { get; private set; } = true;
-
-		public string ToggleAppDevToolsButtonText {
-			get {
-				if (!IsToggleAppDevToolsButtonEnabled) {
-					return "Unavailable";
-				}
-
-				return AreDevToolsEnabled ? "Disable Ctrl+Shift+I" : "Enable Ctrl+Shift+I";
-			}
+		try {
+			await clipboard.SetTextAsync(script);
+			return true;
+		} catch {
+			await Dialog.ShowOk(window, "Copy Tracking Script", "An error occurred while copying to clipboard.");
+			return false;
 		}
+	}
 
-		private readonly Window window;
+	public async void OnClickToggleAppDevTools() {
+		const string DialogTitle = "Discord App Settings File";
 
-		[Obsolete("Designer")]
-		public TrackingPageModel() : this(null!) {}
+		bool oldState = AreDevToolsEnabled;
+		bool newState = !oldState;
 
-		public TrackingPageModel(Window window) {
-			this.window = window;
-		}
+		switch (await DiscordAppSettings.ConfigureDevTools(newState)) {
+			case SettingsJsonResult.Success:
+				AreDevToolsEnabled = newState;
+				await Dialog.ShowOk(window, DialogTitle, "Ctrl+Shift+I was " + (newState ? "enabled." : "disabled.") + " Restart the Discord app for the change to take effect.");
+				break;
 
-		public async Task Initialize() {
-			bool? devToolsEnabled = await DiscordAppSettings.AreDevToolsEnabled();
-			if (devToolsEnabled.HasValue) {
-				AreDevToolsEnabled = devToolsEnabled.Value;
-			}
-			else {
-				IsToggleAppDevToolsButtonEnabled = false;
-				OnPropertyChanged(nameof(IsToggleAppDevToolsButtonEnabled));
-			}
-		}
+			case SettingsJsonResult.AlreadySet:
+				await Dialog.ShowOk(window, DialogTitle, "Ctrl+Shift+I is already " + (newState ? "enabled." : "disabled."));
+				AreDevToolsEnabled = newState;
+				break;
 
-		public async Task<bool> OnClickCopyTrackingScript() {
-			string bootstrap = await Resources.ReadTextAsync("Tracker/bootstrap.js");
-			string script = bootstrap.Replace("= 0; /*[PORT]*/", "= " + ServerManager.Port + ";")
-			                         .Replace("/*[TOKEN]*/", HttpUtility.JavaScriptStringEncode(ServerManager.Token))
-			                         .Replace("/*[IMPORTS]*/", await Resources.ReadJoinedAsync("Tracker/scripts/", '\n'))
-			                         .Replace("/*[CSS-CONTROLLER]*/", await Resources.ReadTextAsync("Tracker/styles/controller.css"))
-			                         .Replace("/*[CSS-SETTINGS]*/", await Resources.ReadTextAsync("Tracker/styles/settings.css"));
+			case SettingsJsonResult.FileNotFound:
+				await Dialog.ShowOk(window, DialogTitle, "Cannot find the settings file:\n" + DiscordAppSettings.JsonFilePath);
+				break;
 
-			var clipboard = Application.Current?.Clipboard;
-			if (clipboard == null) {
-				await Dialog.ShowOk(window, "Copy Tracking Script", "Clipboard is not available on this system.");
-				return false;
-			}
+			case SettingsJsonResult.ReadError:
+				await Dialog.ShowOk(window, DialogTitle, "Cannot read the settings file:\n" + DiscordAppSettings.JsonFilePath);
+				break;
 
-			try {
-				await clipboard.SetTextAsync(script);
-				return true;
-			} catch {
-				await Dialog.ShowOk(window, "Copy Tracking Script", "An error occurred while copying to clipboard.");
-				return false;
-			}
-		}
+			case SettingsJsonResult.InvalidJson:
+				await Dialog.ShowOk(window, DialogTitle, "Unknown format of the settings file:\n" + DiscordAppSettings.JsonFilePath);
+				break;
 
-		public async void OnClickToggleAppDevTools() {
-			const string DialogTitle = "Discord App Settings File";
+			case SettingsJsonResult.WriteError:
+				await Dialog.ShowOk(window, DialogTitle, "Cannot save the settings file:\n" + DiscordAppSettings.JsonFilePath);
+				break;
 
-			bool oldState = AreDevToolsEnabled;
-			bool newState = !oldState;
-
-			switch (await DiscordAppSettings.ConfigureDevTools(newState)) {
-				case SettingsJsonResult.Success:
-					AreDevToolsEnabled = newState;
-					await Dialog.ShowOk(window, DialogTitle, "Ctrl+Shift+I was " + (newState ? "enabled." : "disabled.") + " Restart the Discord app for the change to take effect.");
-					break;
-
-				case SettingsJsonResult.AlreadySet:
-					await Dialog.ShowOk(window, DialogTitle, "Ctrl+Shift+I is already " + (newState ? "enabled." : "disabled."));
-					AreDevToolsEnabled = newState;
-					break;
-
-				case SettingsJsonResult.FileNotFound:
-					await Dialog.ShowOk(window, DialogTitle, "Cannot find the settings file:\n" + DiscordAppSettings.JsonFilePath);
-					break;
-
-				case SettingsJsonResult.ReadError:
-					await Dialog.ShowOk(window, DialogTitle, "Cannot read the settings file:\n" + DiscordAppSettings.JsonFilePath);
-					break;
-
-				case SettingsJsonResult.InvalidJson:
-					await Dialog.ShowOk(window, DialogTitle, "Unknown format of the settings file:\n" + DiscordAppSettings.JsonFilePath);
-					break;
-
-				case SettingsJsonResult.WriteError:
-					await Dialog.ShowOk(window, DialogTitle, "Cannot save the settings file:\n" + DiscordAppSettings.JsonFilePath);
-					break;
-
-				default:
-					throw new ArgumentOutOfRangeException();
-			}
+			default:
+				throw new ArgumentOutOfRangeException();
 		}
 	}
 }

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

@@ -1,16 +1,11 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main.Pages {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class ViewerPage : UserControl {
-		public ViewerPage() {
-			InitializeComponent();
-		}
+namespace DHT.Desktop.Main.Pages;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class ViewerPage : UserControl {
+	public ViewerPage() {
+		InitializeComponent();
 	}
 }

app/Desktop/Main/Pages/ViewerPageModel.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Concurrent;
-using System.Collections.Generic;
 using System.ComponentModel;
 using System.Diagnostics;
 using System.IO;
@@ -8,7 +7,9 @@ using System.Text;
 using System.Threading.Tasks;
 using System.Web;
 using Avalonia.Controls;
+using Avalonia.Platform.Storage;
 using DHT.Desktop.Common;
+using DHT.Desktop.Dialogs.File;
 using DHT.Desktop.Dialogs.Message;
 using DHT.Desktop.Main.Controls;
 using DHT.Desktop.Server;
@@ -19,131 +20,129 @@ using DHT.Server.Database.Export.Strategy;
 using DHT.Utils.Models;
 using static DHT.Desktop.Program;
 
-namespace DHT.Desktop.Main.Pages {
-	sealed class ViewerPageModel : BaseModel, IDisposable {
-		public static readonly ConcurrentBag<string> TemporaryFiles = new ();
-		
-		public bool DatabaseToolFilterModeKeep { get; set; } = true;
-		public bool DatabaseToolFilterModeRemove { get; set; } = false;
+namespace DHT.Desktop.Main.Pages;
 
-		private bool hasFilters = false;
+sealed class ViewerPageModel : BaseModel, IDisposable {
+	public static readonly ConcurrentBag<string> TemporaryFiles = new ();
 
-		public bool HasFilters {
-			get => hasFilters;
-			set => Change(ref hasFilters, value);
-		}
+	public bool DatabaseToolFilterModeKeep { get; set; } = true;
+	public bool DatabaseToolFilterModeRemove { get; set; } = false;
 
-		private MessageFilterPanelModel FilterModel { get; }
+	private bool hasFilters = false;
 
-		private readonly Window window;
-		private readonly IDatabaseFile db;
+	public bool HasFilters {
+		get => hasFilters;
+		set => Change(ref hasFilters, value);
+	}
 
-		[Obsolete("Designer")]
-		public ViewerPageModel() : this(null!, DummyDatabaseFile.Instance) {}
+	private MessageFilterPanelModel FilterModel { get; }
 
-		public ViewerPageModel(Window window, IDatabaseFile db) {
-			this.window = window;
-			this.db = db;
+	private readonly Window window;
+	private readonly IDatabaseFile db;
 
-			FilterModel = new MessageFilterPanelModel(window, db, "Will export");
-			FilterModel.FilterPropertyChanged += OnFilterPropertyChanged;
-		}
+	[Obsolete("Designer")]
+	public ViewerPageModel() : this(null!, DummyDatabaseFile.Instance) {}
 
-		public void Dispose() {
-			FilterModel.Dispose();
-		}
+	public ViewerPageModel(Window window, IDatabaseFile db) {
+		this.window = window;
+		this.db = db;
 
-		private void OnFilterPropertyChanged(object? sender, PropertyChangedEventArgs e) {
-			HasFilters = FilterModel.HasAnyFilters;
-		}
+		FilterModel = new MessageFilterPanelModel(window, db, "Will export");
+		FilterModel.FilterPropertyChanged += OnFilterPropertyChanged;
+	}
 
-		private async Task WriteViewerFile(string path, IViewerExportStrategy strategy) {
-			const string ArchiveTag = "/*[ARCHIVE]*/";
+	public void Dispose() {
+		FilterModel.Dispose();
+	}
 
-			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;
+	private void OnFilterPropertyChanged(object? sender, PropertyChangedEventArgs e) {
+		HasFilters = FilterModel.HasAnyFilters;
+	}
 
-			string jsonTempFile = path + ".tmp";
+	private async Task WriteViewerFile(string path, IViewerExportStrategy strategy) {
+		const string ArchiveTag = "/*[ARCHIVE]*/";
 
-			await using (var jsonStream = new FileStream(jsonTempFile, FileMode.Create, FileAccess.ReadWrite, FileShare.Read)) {
-				await ViewerJsonExport.Generate(jsonStream, strategy, db, FilterModel.CreateFilter());
+		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'));
 
-				char[] jsonBuffer = new char[Math.Min(32768, jsonStream.Position)];
-				jsonStream.Position = 0;
+		int viewerArchiveTagStart = viewerTemplate.IndexOf(ArchiveTag);
+		int viewerArchiveTagEnd = viewerArchiveTagStart + ArchiveTag.Length;
 
-				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]);
+		string jsonTempFile = path + ".tmp";
 
-					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 using (var jsonStream = new FileStream(jsonTempFile, FileMode.Create, FileAccess.ReadWrite, FileShare.Read)) {
+			await ViewerJsonExport.Generate(jsonStream, strategy, db, FilterModel.CreateFilter());
 
-					await outputWriter.WriteAsync(viewerTemplate[viewerArchiveTagEnd..]);
-				}
-			}
+			char[] jsonBuffer = new char[Math.Min(32768, jsonStream.Position)];
+			jsonStream.Position = 0;
 
-			File.Delete(jsonTempFile);
-		}
+			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]);
 
-		public async void OnClickOpenViewer() {
-			string rootPath = Path.Combine(Path.GetTempPath(), "DiscordHistoryTracker");
-			string filenameBase = Path.GetFileNameWithoutExtension(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);
-			await WriteViewerFile(fullPath, new LiveViewerExportStrategy(ServerManager.Port, ServerManager.Token));
-
-			Process.Start(new ProcessStartInfo(fullPath) { UseShellExecute = true });
-		}
-
-		public async void OnClickSaveViewer() {
-			var dialog = new SaveFileDialog {
-				Title = "Save Viewer",
-				InitialFileName = Path.GetFileNameWithoutExtension(db.Path) + ".html",
-				Directory = Path.GetDirectoryName(db.Path),
-				Filters = new List<FileDialogFilter> {
-					new() {
-						Name = "Discord History Viewer",
-						Extensions = { "html" }
+				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));
 					}
 				}
-			}.ShowAsync(window);
 
-			string? path = await dialog;
-			if (!string.IsNullOrEmpty(path)) {
-				await WriteViewerFile(path, StandaloneViewerExportStrategy.Instance);
+				await outputWriter.WriteAsync(viewerTemplate[viewerArchiveTagEnd..]);
 			}
 		}
 
-		public async void OnClickApplyFiltersToDatabase() {
-			var filter = FilterModel.CreateFilter();
+		File.Delete(jsonTempFile);
+	}
 
-			if (DatabaseToolFilterModeKeep) {
-				if (DialogResult.YesNo.Yes == await Dialog.ShowYesNo(window, "Keep Matching Messages in This Database", db.CountMessages(filter).Pluralize("message") + " will be kept, and the rest will be removed from this database. This action cannot be undone. Proceed?")) {
-					db.RemoveMessages(filter, FilterRemovalMode.KeepMatching);
-				}
+	public async void OnClickOpenViewer() {
+		string rootPath = Path.Combine(Path.GetTempPath(), "DiscordHistoryTracker");
+		string filenameBase = Path.GetFileNameWithoutExtension(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);
+		await WriteViewerFile(fullPath, new LiveViewerExportStrategy(ServerManager.Port, ServerManager.Token));
+
+		Process.Start(new ProcessStartInfo(fullPath) { UseShellExecute = true });
+	}
+
+	private static readonly FilePickerFileType[] ViewerFileTypes = {
+		FileDialogs.CreateFilter("Discord History Viewer", new string[] { "html" }),
+	};
+	
+	public async void OnClickSaveViewer() {
+		string? path = await window.StorageProvider.SaveFile(new FilePickerSaveOptions {
+			Title = "Save Viewer",
+			FileTypeChoices = ViewerFileTypes,
+			SuggestedFileName = Path.GetFileNameWithoutExtension(db.Path) + ".html",
+			SuggestedStartLocation = await FileDialogs.GetSuggestedStartLocation(window, Path.GetDirectoryName(db.Path)),
+		});
+
+		if (path != null) {
+			await WriteViewerFile(path, StandaloneViewerExportStrategy.Instance);
+		}
+	}
+
+	public async void OnClickApplyFiltersToDatabase() {
+		var filter = FilterModel.CreateFilter();
+
+		if (DatabaseToolFilterModeKeep) {
+			if (DialogResult.YesNo.Yes == await Dialog.ShowYesNo(window, "Keep Matching Messages in This Database", db.CountMessages(filter).Pluralize("message") + " will be kept, and the rest will be removed from this database. This action cannot be undone. Proceed?")) {
+				db.RemoveMessages(filter, FilterRemovalMode.KeepMatching);
 			}
-			else if (DatabaseToolFilterModeRemove) {
-				if (DialogResult.YesNo.Yes == await Dialog.ShowYesNo(window, "Remove Matching Messages in This Database", db.CountMessages(filter).Pluralize("message") + " will be removed from this database. This action cannot be undone. Proceed?")) {
-					db.RemoveMessages(filter, FilterRemovalMode.RemoveMatching);
-				}
+		}
+		else if (DatabaseToolFilterModeRemove) {
+			if (DialogResult.YesNo.Yes == await Dialog.ShowYesNo(window, "Remove Matching Messages in This Database", db.CountMessages(filter).Pluralize("message") + " will be removed from this database. This action cannot be undone. Proceed?")) {
+				db.RemoveMessages(filter, FilterRemovalMode.RemoveMatching);
 			}
 		}
 	}

app/Desktop/Main/Screens/MainContentScreen.axaml.cs

@@ -1,16 +1,11 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main.Screens {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class MainContentScreen : UserControl {
-		public MainContentScreen() {
-			InitializeComponent();
-		}
+namespace DHT.Desktop.Main.Screens;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class MainContentScreen : UserControl {
+	public MainContentScreen() {
+		InitializeComponent();
 	}
 }

app/Desktop/Main/Screens/MainContentScreenModel.cs

@@ -9,111 +9,111 @@ using DHT.Server.Database;
 using DHT.Server.Service;
 using DHT.Utils.Logging;
 
-namespace DHT.Desktop.Main.Screens {
-	sealed class MainContentScreenModel : IDisposable {
-		private static readonly Log Log = Log.ForType<MainContentScreenModel>();
+namespace DHT.Desktop.Main.Screens;
 
-		public DatabasePage DatabasePage { get; }
-		private DatabasePageModel DatabasePageModel { get; }
+sealed class MainContentScreenModel : IDisposable {
+	private static readonly Log Log = Log.ForType<MainContentScreenModel>();
 
-		public TrackingPage TrackingPage { get; }
-		private TrackingPageModel TrackingPageModel { get; }
+	public DatabasePage DatabasePage { get; }
+	private DatabasePageModel DatabasePageModel { get; }
 
-		public AttachmentsPage AttachmentsPage { get; }
-		private AttachmentsPageModel AttachmentsPageModel { get; }
+	public TrackingPage TrackingPage { get; }
+	private TrackingPageModel TrackingPageModel { get; }
 
-		public ViewerPage ViewerPage { get; }
-		private ViewerPageModel ViewerPageModel { get; }
+	public AttachmentsPage AttachmentsPage { get; }
+	private AttachmentsPageModel AttachmentsPageModel { get; }
 
-		public AdvancedPage AdvancedPage { get; }
-		private AdvancedPageModel AdvancedPageModel { get; }
+	public ViewerPage ViewerPage { get; }
+	private ViewerPageModel ViewerPageModel { get; }
 
-		public DebugPage? DebugPage { get; }
+	public AdvancedPage AdvancedPage { get; }
+	private AdvancedPageModel AdvancedPageModel { get; }
 
-		#if DEBUG
-		public bool HasDebugPage => true;
-		private DebugPageModel DebugPageModel { get; }
-		#else
+	public DebugPage? DebugPage { get; }
+
+	#if DEBUG
+	public bool HasDebugPage => true;
+	private DebugPageModel DebugPageModel { get; }
+	#else
 		public bool HasDebugPage => false;
-		#endif
+	#endif
 
-		public StatusBarModel StatusBarModel { get; }
+	public StatusBarModel StatusBarModel { get; }
 
-		public event EventHandler? DatabaseClosed {
-			add {
-				DatabasePageModel.DatabaseClosed += value;
-			}
-			remove {
-				DatabasePageModel.DatabaseClosed -= value;
-			}
+	public event EventHandler? DatabaseClosed {
+		add {
+			DatabasePageModel.DatabaseClosed += value;
 		}
-
-		private readonly Window window;
-		private readonly ServerManager serverManager;
-
-		[Obsolete("Designer")]
-		public MainContentScreenModel() : this(null!, DummyDatabaseFile.Instance) {}
-
-		public MainContentScreenModel(Window window, IDatabaseFile db) {
-			this.window = window;
-			this.serverManager = new ServerManager(db);
-
-			ServerLauncher.ServerManagementExceptionCaught += ServerLauncherOnServerManagementExceptionCaught;
-
-			DatabasePageModel = new DatabasePageModel(window, db);
-			DatabasePage = new DatabasePage { DataContext = DatabasePageModel };
-
-			TrackingPageModel = new TrackingPageModel(window);
-			TrackingPage = new TrackingPage { DataContext = TrackingPageModel };
-
-			AttachmentsPageModel = new AttachmentsPageModel(db);
-			AttachmentsPage = new AttachmentsPage { DataContext = AttachmentsPageModel };
-
-			ViewerPageModel = new ViewerPageModel(window, db);
-			ViewerPage = new ViewerPage { DataContext = ViewerPageModel };
-
-			AdvancedPageModel = new AdvancedPageModel(window, db, serverManager);
-			AdvancedPage = new AdvancedPage { DataContext = AdvancedPageModel };
-
-			#if DEBUG
-			DebugPageModel = new DebugPageModel(window, db);
-			DebugPage = new DebugPage { DataContext = DebugPageModel };
-			#else
-			DebugPage = null;
-			#endif
-
-			StatusBarModel = new StatusBarModel(db.Statistics);
-
-			AdvancedPageModel.ServerConfigurationModel.ServerStatusChanged += OnServerStatusChanged;
-			DatabaseClosed += OnDatabaseClosed;
-
-			StatusBarModel.CurrentStatus = serverManager.IsRunning ? StatusBarModel.Status.Ready : StatusBarModel.Status.Stopped;
-		}
-
-		public async Task Initialize() {
-			await TrackingPageModel.Initialize();
-			AdvancedPageModel.Initialize();
-			serverManager.Launch();
-		}
-
-		public void Dispose() {
-			ServerLauncher.ServerManagementExceptionCaught -= ServerLauncherOnServerManagementExceptionCaught;
-			AttachmentsPageModel.Dispose();
-			ViewerPageModel.Dispose();
-			serverManager.Dispose();
-		}
-
-		private void OnServerStatusChanged(object? sender, StatusBarModel.Status e) {
-			StatusBarModel.CurrentStatus = e;
-		}
-
-		private void OnDatabaseClosed(object? sender, EventArgs e) {
-			serverManager.Stop();
-		}
-
-		private async void ServerLauncherOnServerManagementExceptionCaught(object? sender, Exception ex) {
-			Log.Error(ex);
-			await Dialog.ShowOk(window, "Internal Server Error", ex.Message);
+		remove {
+			DatabasePageModel.DatabaseClosed -= value;
 		}
 	}
+
+	private readonly Window window;
+	private readonly ServerManager serverManager;
+
+	[Obsolete("Designer")]
+	public MainContentScreenModel() : this(null!, DummyDatabaseFile.Instance) {}
+
+	public MainContentScreenModel(Window window, IDatabaseFile db) {
+		this.window = window;
+		this.serverManager = new ServerManager(db);
+
+		ServerLauncher.ServerManagementExceptionCaught += ServerLauncherOnServerManagementExceptionCaught;
+
+		DatabasePageModel = new DatabasePageModel(window, db);
+		DatabasePage = new DatabasePage { DataContext = DatabasePageModel };
+
+		TrackingPageModel = new TrackingPageModel(window);
+		TrackingPage = new TrackingPage { DataContext = TrackingPageModel };
+
+		AttachmentsPageModel = new AttachmentsPageModel(db);
+		AttachmentsPage = new AttachmentsPage { DataContext = AttachmentsPageModel };
+
+		ViewerPageModel = new ViewerPageModel(window, db);
+		ViewerPage = new ViewerPage { DataContext = ViewerPageModel };
+
+		AdvancedPageModel = new AdvancedPageModel(window, db, serverManager);
+		AdvancedPage = new AdvancedPage { DataContext = AdvancedPageModel };
+
+		#if DEBUG
+		DebugPageModel = new DebugPageModel(window, db);
+		DebugPage = new DebugPage { DataContext = DebugPageModel };
+		#else
+			DebugPage = null;
+		#endif
+
+		StatusBarModel = new StatusBarModel(db.Statistics);
+
+		AdvancedPageModel.ServerConfigurationModel.ServerStatusChanged += OnServerStatusChanged;
+		DatabaseClosed += OnDatabaseClosed;
+
+		StatusBarModel.CurrentStatus = serverManager.IsRunning ? StatusBarModel.Status.Ready : StatusBarModel.Status.Stopped;
+	}
+
+	public async Task Initialize() {
+		await TrackingPageModel.Initialize();
+		AdvancedPageModel.Initialize();
+		serverManager.Launch();
+	}
+
+	public void Dispose() {
+		ServerLauncher.ServerManagementExceptionCaught -= ServerLauncherOnServerManagementExceptionCaught;
+		AttachmentsPageModel.Dispose();
+		ViewerPageModel.Dispose();
+		serverManager.Dispose();
+	}
+
+	private void OnServerStatusChanged(object? sender, StatusBarModel.Status e) {
+		StatusBarModel.CurrentStatus = e;
+	}
+
+	private void OnDatabaseClosed(object? sender, EventArgs e) {
+		serverManager.Stop();
+	}
+
+	private async void ServerLauncherOnServerManagementExceptionCaught(object? sender, Exception ex) {
+		Log.Error(ex);
+		await Dialog.ShowOk(window, "Internal Server Error", ex.Message);
+	}
 }

app/Desktop/Main/Screens/WelcomeScreen.axaml.cs

@@ -1,16 +1,11 @@
 using System.Diagnostics.CodeAnalysis;
 using Avalonia.Controls;
-using Avalonia.Markup.Xaml;
 
-namespace DHT.Desktop.Main.Screens {
-	[SuppressMessage("ReSharper", "MemberCanBeInternal")]
-	public sealed class WelcomeScreen : UserControl {
-		public WelcomeScreen() {
-			InitializeComponent();
-		}
+namespace DHT.Desktop.Main.Screens;
 
-		private void InitializeComponent() {
-			AvaloniaXamlLoader.Load(this);
-		}
+[SuppressMessage("ReSharper", "MemberCanBeInternal")]
+public sealed partial class WelcomeScreen : UserControl {
+	public WelcomeScreen() {
+		InitializeComponent();
 	}
 }

app/Desktop/Main/Screens/WelcomeScreenModel.cs

@@ -7,67 +7,64 @@ using DHT.Desktop.Dialogs.Message;
 using DHT.Server.Database;
 using DHT.Utils.Models;
 
-namespace DHT.Desktop.Main.Screens {
-	sealed class WelcomeScreenModel : BaseModel, IDisposable {
-		public string Version => Program.Version;
+namespace DHT.Desktop.Main.Screens;
 
-		public IDatabaseFile? Db { get; private set; }
-		public bool HasDatabase => Db != null;
+sealed class WelcomeScreenModel : BaseModel, IDisposable {
+	public string Version => Program.Version;
 
-		private readonly Window window;
+	public IDatabaseFile? Db { get; private set; }
+	public bool HasDatabase => Db != null;
 
-		private string? dbFilePath;
+	private readonly Window window;
 
-		[Obsolete("Designer")]
-		public WelcomeScreenModel() : this(null!) {}
+	private string? dbFilePath;
 
-		public WelcomeScreenModel(Window window) {
-			this.window = window;
-		}
+	[Obsolete("Designer")]
+	public WelcomeScreenModel() : this(null!) {}
 
-		public async void OpenOrCreateDatabase() {
-			var dialog = DatabaseGui.NewOpenOrCreateDatabaseFileDialog();
-			dialog.Directory = Path.GetDirectoryName(dbFilePath);
+	public WelcomeScreenModel(Window window) {
+		this.window = window;
+	}
 
-			string? path = await dialog.ShowAsync(window);
-			if (!string.IsNullOrWhiteSpace(path)) {
-				await OpenOrCreateDatabaseFromPath(path);
-			}
-		}
-
-		public async Task OpenOrCreateDatabaseFromPath(string path) {
-			if (Db != null) {
-				Db = null;
-			}
-
-			dbFilePath = path;
-			Db = await DatabaseGui.TryOpenOrCreateDatabaseFromPath(path, window, CheckCanUpgradeDatabase);
-
-			OnPropertyChanged(nameof(Db));
-			OnPropertyChanged(nameof(HasDatabase));
-		}
-
-		private async Task<bool> CheckCanUpgradeDatabase() {
-			return DialogResult.YesNo.Yes == await DatabaseGui.ShowCanUpgradeDatabaseDialog(window);
-		}
-
-		public void CloseDatabase() {
-			Dispose();
-			OnPropertyChanged(nameof(Db));
-			OnPropertyChanged(nameof(HasDatabase));
-		}
-
-		public async void ShowAboutDialog() {
-			await new AboutWindow { DataContext = new AboutWindowModel() }.ShowDialog(this.window);
-		}
-
-		public void Exit() {
-			window.Close();
-		}
-
-		public void Dispose() {
-			Db?.Dispose();
-			Db = null;
+	public async void OpenOrCreateDatabase() {
+		var path = await DatabaseGui.NewOpenOrCreateDatabaseFileDialog(window, Path.GetDirectoryName(dbFilePath));
+		if (path != null) {
+			await OpenOrCreateDatabaseFromPath(path);
 		}
 	}
+
+	public async Task OpenOrCreateDatabaseFromPath(string path) {
+		if (Db != null) {
+			Db = null;
+		}
+
+		dbFilePath = path;
+		Db = await DatabaseGui.TryOpenOrCreateDatabaseFromPath(path, window, CheckCanUpgradeDatabase);
+
+		OnPropertyChanged(nameof(Db));
+		OnPropertyChanged(nameof(HasDatabase));
+	}
+
+	private async Task<bool> CheckCanUpgradeDatabase() {
+		return DialogResult.YesNo.Yes == await DatabaseGui.ShowCanUpgradeDatabaseDialog(window);
+	}
+
+	public void CloseDatabase() {
+		Dispose();
+		OnPropertyChanged(nameof(Db));
+		OnPropertyChanged(nameof(HasDatabase));
+	}
+
+	public async void ShowAboutDialog() {
+		await new AboutWindow { DataContext = new AboutWindowModel() }.ShowDialog(this.window);
+	}
+
+	public void Exit() {
+		window.Close();
+	}
+
+	public void Dispose() {
+		Db?.Dispose();
+		Db = null;
+	}
 }

app/Desktop/Program.cs

@@ -3,37 +3,38 @@ using System.Reflection;
 using Avalonia;
 using DHT.Utils.Resources;
 
-namespace DHT.Desktop {
-	static class Program {
-		public static string Version { get; }
-		public static CultureInfo Culture { get; }
-		public static ResourceLoader Resources { get; }
+namespace DHT.Desktop;
 
-		static Program() {
-			var assembly = Assembly.GetExecutingAssembly();
-			
-			Version = assembly.GetName().Version?.ToString() ?? "";
-			while (Version.EndsWith(".0")) {
-				Version = Version[..^2];
-			}
+static class Program {
+	public static string Version { get; }
+	public static CultureInfo Culture { get; }
+	public static ResourceLoader Resources { get; }
 
-			Culture = CultureInfo.CurrentCulture;
-			CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;
-			CultureInfo.CurrentUICulture = CultureInfo.InvariantCulture;
-			CultureInfo.DefaultThreadCurrentCulture = CultureInfo.InvariantCulture;
-			CultureInfo.DefaultThreadCurrentUICulture = CultureInfo.InvariantCulture;
-			
-			Resources = new ResourceLoader(assembly);
+	static Program() {
+		var assembly = Assembly.GetExecutingAssembly();
+
+		Version = assembly.GetName().Version?.ToString() ?? "";
+		while (Version.EndsWith(".0")) {
+			Version = Version[..^2];
 		}
 
-		public static void Main(string[] args) {
-			BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
-		}
+		Culture = CultureInfo.CurrentCulture;
+		CultureInfo.CurrentCulture = CultureInfo.InvariantCulture;
+		CultureInfo.CurrentUICulture = CultureInfo.InvariantCulture;
+		CultureInfo.DefaultThreadCurrentCulture = CultureInfo.InvariantCulture;
+		CultureInfo.DefaultThreadCurrentUICulture = CultureInfo.InvariantCulture;
 
-		private static AppBuilder BuildAvaloniaApp() {
-			return AppBuilder.Configure<App>()
-			                 .UsePlatformDetect()
-			                 .LogToTrace();
-		}
+		Resources = new ResourceLoader(assembly);
+	}
+
+	public static void Main(string[] args) {
+		BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
+	}
+
+	private static AppBuilder BuildAvaloniaApp() {
+		return AppBuilder.Configure<App>()
+		                 .UsePlatformDetect()
+		                 .WithInterFont()
+		                 .LogToTrace();
 	}
 }

app/Desktop/Server/ServerManager.cs

@@ -2,49 +2,49 @@ using System;
 using DHT.Server.Database;
 using DHT.Server.Service;
 
-namespace DHT.Desktop.Server {
-	sealed class ServerManager : IDisposable {
-		public static ushort Port { get; set; } = ServerUtils.FindAvailablePort(50000, 60000);
-		public static string Token { get; set; } = ServerUtils.GenerateRandomToken(20);
+namespace DHT.Desktop.Server;
 
-		private static ServerManager? instance;
+sealed class ServerManager : IDisposable {
+	public static ushort Port { get; set; } = ServerUtils.FindAvailablePort(50000, 60000);
+	public static string Token { get; set; } = ServerUtils.GenerateRandomToken(20);
 
-		public bool IsRunning => ServerLauncher.IsRunning;
-		
-		private readonly IDatabaseFile db;
-		
-		public ServerManager(IDatabaseFile db) {
-			if (db != DummyDatabaseFile.Instance) {
-				if (instance != null) {
-					throw new InvalidOperationException("Only one instance of ServerManager can exist at the same time!");
-				}
+	private static ServerManager? instance;
 
-				instance = this;
+	public bool IsRunning => ServerLauncher.IsRunning;
+
+	private readonly IDatabaseFile db;
+
+	public ServerManager(IDatabaseFile db) {
+		if (db != DummyDatabaseFile.Instance) {
+			if (instance != null) {
+				throw new InvalidOperationException("Only one instance of ServerManager can exist at the same time!");
 			}
 
-			this.db = db;
+			instance = this;
 		}
 
-		public void Launch() {
-			ServerLauncher.Relaunch(Port, Token, db);
-		}
+		this.db = db;
+	}
 
-		public void Relaunch(ushort port, string token) {
-			Port = port;
-			Token = token;
-			Launch();
-		}
+	public void Launch() {
+		ServerLauncher.Relaunch(Port, Token, db);
+	}
 
-		public void Stop() {
-			ServerLauncher.Stop();
-		}
+	public void Relaunch(ushort port, string token) {
+		Port = port;
+		Token = token;
+		Launch();
+	}
 
-		public void Dispose() {
-			Stop();
-			
-			if (instance == this) {
-				instance = null;
-			}
+	public void Stop() {
+		ServerLauncher.Stop();
+	}
+
+	public void Dispose() {
+		Stop();
+
+		if (instance == this) {
+			instance = null;
 		}
 	}
 }

app/Directory.build.props

@@ -0,0 +1,8 @@
+<Project>
+  
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <LangVersion>11</LangVersion>
+  </PropertyGroup>
+  
+</Project>

app/Server/Data/Aggregations/DownloadStatusStatistics.cs

@@ -1,15 +1,15 @@
-namespace DHT.Server.Data.Aggregations {
-	public sealed class DownloadStatusStatistics {
-		public int EnqueuedCount { get; internal set; }
-		public ulong EnqueuedSize { get; internal set; }
+namespace DHT.Server.Data.Aggregations;
 
-		public int SuccessfulCount { get; internal set; }
-		public ulong SuccessfulSize { get; internal set; }
+public sealed class DownloadStatusStatistics {
+	public int EnqueuedCount { get; internal set; }
+	public ulong EnqueuedSize { get; internal set; }
 
-		public int FailedCount { get; internal set; }
-		public ulong FailedSize { get; internal set; }
+	public int SuccessfulCount { get; internal set; }
+	public ulong SuccessfulSize { get; internal set; }
 
-		public int SkippedCount { get; internal set; }
-		public ulong SkippedSize { get; internal set; }
-	}
+	public int FailedCount { get; internal set; }
+	public ulong FailedSize { get; internal set; }
+
+	public int SkippedCount { get; internal set; }
+	public ulong SkippedSize { get; internal set; }
 }

app/Server/Data/Attachment.cs

@@ -1,11 +1,11 @@
-namespace DHT.Server.Data {
-	public readonly struct Attachment {
-		public ulong Id { get; internal init; }
-		public string Name { get; internal init; }
-		public string? Type { get; internal init; }
-		public string Url { get; internal init; }
-		public ulong Size { get; internal init; }
-		public int? Width { get; internal init; }
-		public int? Height { get; internal init; }
-	}
+namespace DHT.Server.Data;
+
+public readonly struct Attachment {
+	public ulong Id { get; internal init; }
+	public string Name { get; internal init; }
+	public string? Type { get; internal init; }
+	public string Url { get; internal init; }
+	public ulong Size { get; internal init; }
+	public int? Width { get; internal init; }
+	public int? Height { get; internal init; }
 }

app/Server/Data/Channel.cs

@@ -1,11 +1,11 @@
-namespace DHT.Server.Data {
-	public readonly struct Channel {
-		public ulong Id { get; init; }
-		public ulong Server { get; init; }
-		public string Name { get; init; }
-		public ulong? ParentId { get; init; }
-		public int? Position { get; init; }
-		public string? Topic { get; init; }
-		public bool? Nsfw { get; init; }
-	}
+namespace DHT.Server.Data;
+
+public readonly struct Channel {
+	public ulong Id { get; init; }
+	public ulong Server { get; init; }
+	public string Name { get; init; }
+	public ulong? ParentId { get; init; }
+	public int? Position { get; init; }
+	public string? Topic { get; init; }
+	public bool? Nsfw { get; init; }
 }

app/Server/Data/Download.cs

@@ -1,30 +1,30 @@
 using System;
 using System.Net;
 
-namespace DHT.Server.Data {
-	public readonly struct Download {
-		internal static Download NewSuccess(string url, byte[] data) {
-			return new Download(url, DownloadStatus.Success, (ulong) Math.Max(data.LongLength, 0), data);
-		}
+namespace DHT.Server.Data;
 
-		internal static Download NewFailure(string url, HttpStatusCode? statusCode, ulong size) {
-			return new Download(url, statusCode.HasValue ? (DownloadStatus) (int) statusCode : DownloadStatus.GenericError, size);
-		}
+public readonly struct Download {
+	internal static Download NewSuccess(string url, byte[] data) {
+		return new Download(url, DownloadStatus.Success, (ulong) Math.Max(data.LongLength, 0), data);
+	}
 
-		public string Url { get; }
-		public DownloadStatus Status { get; }
-		public ulong Size { get; }
-		public byte[]? Data { get; }
+	internal static Download NewFailure(string url, HttpStatusCode? statusCode, ulong size) {
+		return new Download(url, statusCode.HasValue ? (DownloadStatus) (int) statusCode : DownloadStatus.GenericError, size);
+	}
 
-		internal Download(string url, DownloadStatus status, ulong size, byte[]? data = null) {
-			Url = url;
-			Status = status;
-			Size = size;
-			Data = data;
-		}
+	public string Url { get; }
+	public DownloadStatus Status { get; }
+	public ulong Size { get; }
+	public byte[]? Data { get; }
 
-		internal Download WithData(byte[] data) {
-			return new Download(Url, Status, Size, data);
-		}
+	internal Download(string url, DownloadStatus status, ulong size, byte[]? data = null) {
+		Url = url;
+		Status = status;
+		Size = size;
+		Data = data;
+	}
+
+	internal Download WithData(byte[] data) {
+		return new Download(Url, Status, Size, data);
 	}
 }

app/Server/Data/DownloadStatus.cs

@@ -1,12 +1,12 @@
 using System.Net;
 
-namespace DHT.Server.Data {
-	/// <summary>
-	/// Extends <see cref="HttpStatusCode"/> with custom status codes in the range 0-99.
-	/// </summary>
-	public enum DownloadStatus {
-		Enqueued = 0,
-		GenericError = 1,
-		Success = HttpStatusCode.OK
-	}
+namespace DHT.Server.Data;
+
+/// <summary>
+/// Extends <see cref="HttpStatusCode"/> with custom status codes in the range 0-99.
+/// </summary>
+public enum DownloadStatus {
+	Enqueued = 0,
+	GenericError = 1,
+	Success = HttpStatusCode.OK
 }

app/Server/Data/DownloadedAttachment.cs

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

app/Server/Data/Embed.cs

@@ -1,5 +1,5 @@
-namespace DHT.Server.Data {
-	public readonly struct Embed {
-		public string Json { get; internal init; }
-	}
+namespace DHT.Server.Data;
+
+public readonly struct Embed {
+	public string Json { get; internal init; }
 }

app/Server/Data/EmojiFlags.cs

@@ -1,9 +1,9 @@
 using System;
 
-namespace DHT.Server.Data {
-	[Flags]
-	public enum EmojiFlags : ushort {
-		None = 0,
-		Animated = 0b1
-	}
+namespace DHT.Server.Data;
+
+[Flags]
+public enum EmojiFlags : ushort {
+	None = 0,
+	Animated = 0b1
 }

app/Server/Data/Filters/AttachmentFilter.cs

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

app/Server/Data/Filters/DownloadItemFilter.cs

@@ -1,10 +1,10 @@
 using System.Collections.Generic;
 
-namespace DHT.Server.Data.Filters {
-	public sealed class DownloadItemFilter {
-		public HashSet<DownloadStatus>? IncludeStatuses { get; set; } = null;
-		public HashSet<DownloadStatus>? ExcludeStatuses { get; set; } = null;
+namespace DHT.Server.Data.Filters;
 
-		public bool IsEmpty => IncludeStatuses == null && ExcludeStatuses == null;
-	}
+public sealed class DownloadItemFilter {
+	public HashSet<DownloadStatus>? IncludeStatuses { get; init; } = null;
+	public HashSet<DownloadStatus>? ExcludeStatuses { get; init; } = null;
+
+	public bool IsEmpty => IncludeStatuses == null && ExcludeStatuses == null;
 }

app/Server/Data/Filters/FilterRemovalMode.cs

@@ -1,6 +1,6 @@
-namespace DHT.Server.Data.Filters {
-	public enum FilterRemovalMode {
-		KeepMatching,
-		RemoveMatching
-	}
+namespace DHT.Server.Data.Filters;
+
+public enum FilterRemovalMode {
+	KeepMatching,
+	RemoveMatching
 }

app/Server/Data/Filters/MessageFilter.cs

@@ -1,19 +1,19 @@
 using System;
 using System.Collections.Generic;
 
-namespace DHT.Server.Data.Filters {
-	public sealed class MessageFilter {
-		public DateTime? StartDate { get; set; } = null;
-		public DateTime? EndDate { get; set; } = null;
+namespace DHT.Server.Data.Filters;
 
-		public HashSet<ulong>? ChannelIds { get; set; } = null;
-		public HashSet<ulong>? UserIds { get; set; } = null;
-		public HashSet<ulong>? MessageIds { get; set; } = null;
+public sealed class MessageFilter {
+	public DateTime? StartDate { get; set; } = null;
+	public DateTime? EndDate { get; set; } = null;
 
-		public bool IsEmpty => StartDate == null &&
-		                       EndDate == null &&
-		                       ChannelIds == null &&
-		                       UserIds == null &&
-		                       MessageIds == null;
-	}
+	public HashSet<ulong>? ChannelIds { get; set; } = null;
+	public HashSet<ulong>? UserIds { get; set; } = null;
+	public HashSet<ulong>? MessageIds { get; set; } = null;
+
+	public bool IsEmpty => StartDate == null &&
+	                       EndDate == null &&
+	                       ChannelIds == null &&
+	                       UserIds == null &&
+	                       MessageIds == null;
 }

app/Server/Data/Message.cs

@@ -1,16 +1,16 @@
 using System.Collections.Immutable;
 
-namespace DHT.Server.Data {
-	public readonly struct Message {
-		public ulong Id { get; init; }
-		public ulong Sender { get; init; }
-		public ulong Channel { get; init; }
-		public string Text { get; init; }
-		public long Timestamp { get; init; }
-		public long? EditTimestamp { get; init; }
-		public ulong? RepliedToId { get; init; }
-		public ImmutableArray<Attachment> Attachments { get; init; }
-		public ImmutableArray<Embed> Embeds { get; init; }
-		public ImmutableArray<Reaction> Reactions { get; init; }
-	}
+namespace DHT.Server.Data;
+
+public readonly struct Message {
+	public ulong Id { get; init; }
+	public ulong Sender { get; init; }
+	public ulong Channel { get; init; }
+	public string Text { get; init; }
+	public long Timestamp { get; init; }
+	public long? EditTimestamp { get; init; }
+	public ulong? RepliedToId { get; init; }
+	public ImmutableArray<Attachment> Attachments { get; init; }
+	public ImmutableArray<Embed> Embeds { get; init; }
+	public ImmutableArray<Reaction> Reactions { get; init; }
 }

app/Server/Data/Reaction.cs

@@ -1,8 +1,8 @@
-namespace DHT.Server.Data {
-	public readonly struct Reaction {
-		public ulong? EmojiId { get; internal init; }
-		public string? EmojiName { get; internal init; }
-		public EmojiFlags EmojiFlags { get; internal init; }
-		public int Count { get; internal init; }
-	}
+namespace DHT.Server.Data;
+
+public readonly struct Reaction {
+	public ulong? EmojiId { get; internal init; }
+	public string? EmojiName { get; internal init; }
+	public EmojiFlags EmojiFlags { get; internal init; }
+	public int Count { get; internal init; }
 }

app/Server/Data/Server.cs

@@ -1,7 +1,7 @@
-namespace DHT.Server.Data {
-	public readonly struct Server {
-		public ulong Id { get; init; }
-		public string Name { get; init; }
-		public ServerType? Type { get; init; }
-	}
+namespace DHT.Server.Data;
+
+public readonly struct Server {
+	public ulong Id { get; init; }
+	public string Name { get; init; }
+	public ServerType? Type { get; init; }
 }

app/Server/Data/ServerType.cs

@@ -1,45 +1,45 @@
-namespace DHT.Server.Data {
-	public enum ServerType {
-		Server,
-		Group,
-		DirectMessage
+namespace DHT.Server.Data;
+
+public enum ServerType {
+	Server,
+	Group,
+	DirectMessage
+}
+
+public static class ServerTypes {
+	public static ServerType? FromString(string? str) {
+		return str switch {
+			"SERVER" => ServerType.Server,
+			"GROUP"  => ServerType.Group,
+			"DM"     => ServerType.DirectMessage,
+			_        => null
+		};
 	}
 
-	public static class ServerTypes {
-		public static ServerType? FromString(string? str) {
-			return str switch {
-				"SERVER" => ServerType.Server,
-				"GROUP"  => ServerType.Group,
-				"DM"     => ServerType.DirectMessage,
-				_        => null
-			};
-		}
+	public static string ToString(ServerType? type) {
+		return type switch {
+			ServerType.Server        => "SERVER",
+			ServerType.Group         => "GROUP",
+			ServerType.DirectMessage => "DM",
+			_                        => "UNKNOWN"
+		};
+	}
 
-		public static string ToString(ServerType? type) {
-			return type switch {
-				ServerType.Server        => "SERVER",
-				ServerType.Group         => "GROUP",
-				ServerType.DirectMessage => "DM",
-				_                        => "UNKNOWN"
-			};
-		}
+	public static string ToNiceString(ServerType? type) {
+		return type switch {
+			ServerType.Server        => "Server",
+			ServerType.Group         => "Group",
+			ServerType.DirectMessage => "DM",
+			_                        => "Unknown"
+		};
+	}
 
-		public static string ToNiceString(ServerType? type) {
-			return type switch {
-				ServerType.Server        => "Server",
-				ServerType.Group         => "Group",
-				ServerType.DirectMessage => "DM",
-				_                        => "Unknown"
-			};
-		}
-
-		internal static string ToJsonViewerString(ServerType? type) {
-			return type switch {
-				ServerType.Server        => "server",
-				ServerType.Group         => "group",
-				ServerType.DirectMessage => "user",
-				_                        => "unknown"
-			};
-		}
+	internal static string ToJsonViewerString(ServerType? type) {
+		return type switch {
+			ServerType.Server        => "server",
+			ServerType.Group         => "group",
+			ServerType.DirectMessage => "user",
+			_                        => "unknown"
+		};
 	}
 }

app/Server/Data/User.cs

@@ -1,8 +1,8 @@
-namespace DHT.Server.Data {
-	public readonly struct User {
-		public ulong Id { get; init; }
-		public string Name { get; init; }
-		public string? AvatarUrl { get; init; }
-		public string? Discriminator { get; init; }
-	}
+namespace DHT.Server.Data;
+
+public readonly struct User {
+	public ulong Id { get; init; }
+	public string Name { get; init; }
+	public string? AvatarUrl { get; init; }
+	public string? Discriminator { get; init; }
 }

app/Server/Database/DatabaseExtensions.cs

@@ -1,29 +1,29 @@
 using System.Collections.Generic;
 using DHT.Server.Data;
 
-namespace DHT.Server.Database {
-	public static class DatabaseExtensions {
-		public static void AddFrom(this IDatabaseFile target, IDatabaseFile source) {
-			target.AddServers(source.GetAllServers());
-			target.AddChannels(source.GetAllChannels());
-			target.AddUsers(source.GetAllUsers().ToArray());
-			target.AddMessages(source.GetMessages().ToArray());
-			
-			foreach (var download in source.GetDownloadsWithoutData()) {
-				target.AddDownload(download.Status == DownloadStatus.Success ? source.GetDownloadWithData(download) : download);
-			}
-		}
+namespace DHT.Server.Database;
 
-		internal static void AddServers(this IDatabaseFile target, IEnumerable<Data.Server> servers) {
-			foreach (var server in servers) {
-				target.AddServer(server);
-			}
-		}
+public static class DatabaseExtensions {
+	public static void AddFrom(this IDatabaseFile target, IDatabaseFile source) {
+		target.AddServers(source.GetAllServers());
+		target.AddChannels(source.GetAllChannels());
+		target.AddUsers(source.GetAllUsers().ToArray());
+		target.AddMessages(source.GetMessages().ToArray());
 
-		internal static void AddChannels(this IDatabaseFile target, IEnumerable<Channel> channels) {
-			foreach (var channel in channels) {
-				target.AddChannel(channel);
-			}
+		foreach (var download in source.GetDownloadsWithoutData()) {
+			target.AddDownload(download.Status == DownloadStatus.Success ? source.GetDownloadWithData(download) : download);
+		}
+	}
+
+	internal static void AddServers(this IDatabaseFile target, IEnumerable<Data.Server> servers) {
+		foreach (var server in servers) {
+			target.AddServer(server);
+		}
+	}
+
+	internal static void AddChannels(this IDatabaseFile target, IEnumerable<Channel> channels) {
+		foreach (var channel in channels) {
+			target.AddChannel(channel);
 		}
 	}
 }

app/Server/Database/DatabaseStatistics.cs

@@ -1,46 +1,46 @@
 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;
+namespace DHT.Server.Database;
 
-		public long TotalServers {
-			get => totalServers;
-			internal set => Change(ref totalServers, value);
-		}
+/// <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 TotalChannels {
-			get => totalChannels;
-			internal set => Change(ref totalChannels, value);
-		}
+	public long TotalServers {
+		get => totalServers;
+		internal set => Change(ref totalServers, value);
+	}
 
-		public long TotalUsers {
-			get => totalUsers;
-			internal set => Change(ref totalUsers, value);
-		}
+	public long TotalChannels {
+		get => totalChannels;
+		internal set => Change(ref totalChannels, value);
+	}
 
-		public long? TotalMessages {
-			get => totalMessages;
-			internal set => Change(ref totalMessages, value);
-		}
+	public long TotalUsers {
+		get => totalUsers;
+		internal set => Change(ref totalUsers, value);
+	}
 
-		public long? TotalAttachments {
-			get => totalAttachments;
-			internal set => Change(ref totalAttachments, value);
-		}
+	public long? TotalMessages {
+		get => totalMessages;
+		internal set => Change(ref totalMessages, value);
+	}
 
-		public long? TotalDownloads {
-			get => totalDownloads;
-			internal set => Change(ref totalDownloads, 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 +1,11 @@
-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; }
-	}
+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

@@ -1,88 +1,90 @@
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using DHT.Server.Data;
 using DHT.Server.Data.Aggregations;
 using DHT.Server.Data.Filters;
 using DHT.Server.Download;
 
-namespace DHT.Server.Database {
-	public sealed class DummyDatabaseFile : IDatabaseFile {
-		public static DummyDatabaseFile Instance { get; } = new();
+namespace DHT.Server.Database;
 
-		public string Path => "";
-		public DatabaseStatistics Statistics { get; } = new();
+[SuppressMessage("ReSharper", "ArrangeObjectCreationWhenTypeNotEvident")]
+public sealed class DummyDatabaseFile : IDatabaseFile {
+	public static DummyDatabaseFile Instance { get; } = new();
 
-		private DummyDatabaseFile() {}
+	public string Path => "";
+	public DatabaseStatistics Statistics { get; } = new();
 
-		public DatabaseStatisticsSnapshot SnapshotStatistics() {
-			return new();
-		}
+	private DummyDatabaseFile() {}
 
-		public void AddServer(Data.Server server) {}
-
-		public List<Data.Server> GetAllServers() {
-			return new();
-		}
-
-		public void AddChannel(Channel channel) {}
-
-		public List<Channel> GetAllChannels() {
-			return new();
-		}
-
-		public void AddUsers(User[] users) {}
-
-		public List<User> GetAllUsers() {
-			return new();
-		}
-
-		public void AddMessages(Message[] messages) {}
-
-		public int CountMessages(MessageFilter? filter = null) {
-			return 0;
-		}
-
-		public List<Message> GetMessages(MessageFilter? filter = null) {
-			return new();
-		}
-
-		public HashSet<ulong> GetMessageIds(MessageFilter? filter = null) {
-			return new();
-		}
-
-		public void RemoveMessages(MessageFilter filter, FilterRemovalMode mode) {}
-
-		public int CountAttachments(AttachmentFilter? filter = null) {
-			return new();
-		}
-
-		public List<Data.Download> GetDownloadsWithoutData() {
-			return new();
-		}
-
-		public Data.Download GetDownloadWithData(Data.Download download) {
-			return download;
-		}
-
-		public DownloadedAttachment? GetDownloadedAttachment(string url) {
-			return null;
-		}
-
-		public void AddDownload(Data.Download download) {}
-
-		public void EnqueueDownloadItems(AttachmentFilter? filter = null) {}
-		
-		public List<DownloadItem> GetEnqueuedDownloadItems(int count) {
-			return new();
-		}
-
-		public void RemoveDownloadItems(DownloadItemFilter? filter, FilterRemovalMode mode) {}
-
-		public DownloadStatusStatistics GetDownloadStatusStatistics() {
-			return new();
-		}
-
-		public void Vacuum() {}
-
-		public void Dispose() {}
+	public DatabaseStatisticsSnapshot SnapshotStatistics() {
+		return new();
 	}
+
+	public void AddServer(Data.Server server) {}
+
+	public List<Data.Server> GetAllServers() {
+		return new();
+	}
+
+	public void AddChannel(Channel channel) {}
+
+	public List<Channel> GetAllChannels() {
+		return new();
+	}
+
+	public void AddUsers(User[] users) {}
+
+	public List<User> GetAllUsers() {
+		return new();
+	}
+
+	public void AddMessages(Message[] messages) {}
+
+	public int CountMessages(MessageFilter? filter = null) {
+		return 0;
+	}
+
+	public List<Message> GetMessages(MessageFilter? filter = null) {
+		return new();
+	}
+
+	public HashSet<ulong> GetMessageIds(MessageFilter? filter = null) {
+		return new();
+	}
+
+	public void RemoveMessages(MessageFilter filter, FilterRemovalMode mode) {}
+
+	public int CountAttachments(AttachmentFilter? filter = null) {
+		return new();
+	}
+
+	public List<Data.Download> GetDownloadsWithoutData() {
+		return new();
+	}
+
+	public Data.Download GetDownloadWithData(Data.Download download) {
+		return download;
+	}
+
+	public DownloadedAttachment? GetDownloadedAttachment(string url) {
+		return null;
+	}
+
+	public void AddDownload(Data.Download download) {}
+
+	public void EnqueueDownloadItems(AttachmentFilter? filter = null) {}
+
+	public List<DownloadItem> GetEnqueuedDownloadItems(int count) {
+		return new();
+	}
+
+	public void RemoveDownloadItems(DownloadItemFilter? filter, FilterRemovalMode mode) {}
+
+	public DownloadStatusStatistics GetDownloadStatusStatistics() {
+		return new();
+	}
+
+	public void Vacuum() {}
+
+	public void Dispose() {}
 }

app/Server/Database/Exceptions/DatabaseTooNewException.cs

@@ -1,13 +1,13 @@
 using System;
 using DHT.Server.Database.Sqlite;
 
-namespace DHT.Server.Database.Exceptions {
-	public sealed class DatabaseTooNewException : Exception {
-		public int DatabaseVersion { get; }
-		public int CurrentVersion => Schema.Version;
+namespace DHT.Server.Database.Exceptions;
 
-		internal DatabaseTooNewException(int databaseVersion) : base("Database is too new: " + databaseVersion + " > " + Schema.Version) {
-			this.DatabaseVersion = databaseVersion;
-		}
+public sealed class DatabaseTooNewException : Exception {
+	public int DatabaseVersion { get; }
+	public int CurrentVersion => Schema.Version;
+
+	internal DatabaseTooNewException(int databaseVersion) : base("Database is too new: " + databaseVersion + " > " + Schema.Version) {
+		this.DatabaseVersion = databaseVersion;
 	}
 }

app/Server/Database/Exceptions/InvalidDatabaseVersionException.cs

@@ -1,11 +1,11 @@
 using System;
 
-namespace DHT.Server.Database.Exceptions {
-	public sealed class InvalidDatabaseVersionException : Exception {
-		public string Version { get; }
+namespace DHT.Server.Database.Exceptions;
 
-		internal InvalidDatabaseVersionException(string version) : base("Invalid database version: " + version) {
-			this.Version = version;
-		}
+public sealed class InvalidDatabaseVersionException : Exception {
+	public string Version { get; }
+
+	internal InvalidDatabaseVersionException(string version) : base("Invalid database version: " + version) {
+		this.Version = version;
 	}
 }

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

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

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

@@ -1,18 +1,18 @@
 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);
-		}
+namespace DHT.Server.Database.Export.Strategy;
 
-		public string GetAttachmentUrl(Attachment attachment) {
-			return "http://127.0.0.1:" + safePort + "/get-attachment/" + WebUtility.UrlEncode(attachment.Url) + "?token=" + safeToken;
-		}
+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.Url) + "?token=" + safeToken;
 	}
 }

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

@@ -1,13 +1,13 @@
 using DHT.Server.Data;
 
-namespace DHT.Server.Database.Export.Strategy {
-	public sealed class StandaloneViewerExportStrategy : IViewerExportStrategy {
-		public static StandaloneViewerExportStrategy Instance { get; } = new ();
+namespace DHT.Server.Database.Export.Strategy;
 
-		private StandaloneViewerExportStrategy() {}
+public sealed class StandaloneViewerExportStrategy : IViewerExportStrategy {
+	public static StandaloneViewerExportStrategy Instance { get; } = new ();
 
-		public string GetAttachmentUrl(Attachment attachment) {
-			return attachment.Url;
-		}
+	private StandaloneViewerExportStrategy() {}
+
+	public string GetAttachmentUrl(Attachment attachment) {
+		return attachment.Url;
 	}
 }

app/Server/Database/Export/ViewerJsonExport.cs

@@ -9,207 +9,207 @@ using DHT.Server.Data.Filters;
 using DHT.Server.Database.Export.Strategy;
 using DHT.Utils.Logging;
 
-namespace DHT.Server.Database.Export {
-	public static class ViewerJsonExport {
-		private static readonly Log Log = Log.ForType(typeof(ViewerJsonExport));
+namespace DHT.Server.Database.Export;
 
-		public static async Task Generate(Stream stream, IViewerExportStrategy strategy, IDatabaseFile db, MessageFilter? filter = null) {
-			var perf = Log.Start();
+public static class ViewerJsonExport {
+	private static readonly Log Log = Log.ForType(typeof(ViewerJsonExport));
 
-			var includedUserIds = new HashSet<ulong>();
-			var includedChannelIds = new HashSet<ulong>();
-			var includedServerIds = new HashSet<ulong>();
+	public static async Task Generate(Stream stream, IViewerExportStrategy strategy, IDatabaseFile db, MessageFilter? filter = null) {
+		var perf = Log.Start();
 
-			var includedMessages = db.GetMessages(filter);
-			var includedChannels = new List<Channel>();
+		var includedUserIds = new HashSet<ulong>();
+		var includedChannelIds = new HashSet<ulong>();
+		var includedServerIds = new HashSet<ulong>();
 
-			foreach (var message in includedMessages) {
-				includedUserIds.Add(message.Sender);
-				includedChannelIds.Add(message.Channel);
+		var includedMessages = db.GetMessages(filter);
+		var includedChannels = new List<Channel>();
+
+		foreach (var message in includedMessages) {
+			includedUserIds.Add(message.Sender);
+			includedChannelIds.Add(message.Channel);
+		}
+
+		foreach (var channel in db.GetAllChannels()) {
+			if (includedChannelIds.Contains(channel.Id)) {
+				includedChannels.Add(channel);
+				includedServerIds.Add(channel.Server);
+			}
+		}
+
+		var users = GenerateUserList(db, includedUserIds, out var userindex, out var userIndices);
+		var servers = GenerateServerList(db, includedServerIds, out var serverindex);
+		var channels = GenerateChannelList(includedChannels, serverindex);
+
+		perf.Step("Collect database data");
+
+		var value = new {
+			meta = new { users, userindex, servers, channels },
+			data = GenerateMessageList(includedMessages, userIndices, strategy),
+		};
+
+		perf.Step("Generate value object");
+
+		var opts = new JsonSerializerOptions();
+		opts.Converters.Add(new ViewerJsonSnowflakeSerializer());
+
+		await JsonSerializer.SerializeAsync(stream, value, opts);
+
+		perf.Step("Serialize to JSON");
+		perf.End();
+	}
+
+	private static Dictionary<string, object> GenerateUserList(IDatabaseFile db, HashSet<ulong> userIds, out List<string> userindex, out Dictionary<ulong, object> userIndices) {
+		var users = new Dictionary<string, object>();
+		userindex = new List<string>();
+		userIndices = new Dictionary<ulong, object>();
+
+		foreach (var user in db.GetAllUsers()) {
+			var id = user.Id;
+			if (!userIds.Contains(id)) {
+				continue;
 			}
 
-			foreach (var channel in db.GetAllChannels()) {
-				if (includedChannelIds.Contains(channel.Id)) {
-					includedChannels.Add(channel);
-					includedServerIds.Add(channel.Server);
-				}
-			}
-
-			var users = GenerateUserList(db, includedUserIds, out var userindex, out var userIndices);
-			var servers = GenerateServerList(db, includedServerIds, out var serverindex);
-			var channels = GenerateChannelList(includedChannels, serverindex);
-
-			perf.Step("Collect database data");
-
-			var value = new {
-				meta = new { users, userindex, servers, channels },
-				data = GenerateMessageList(includedMessages, userIndices, strategy)
+			var obj = new Dictionary<string, object> {
+				["name"] = user.Name
 			};
-			
-			perf.Step("Generate value object");
-			
-			var opts = new JsonSerializerOptions();
-			opts.Converters.Add(new ViewerJsonSnowflakeSerializer());
 
-			await JsonSerializer.SerializeAsync(stream, value, opts);
+			if (user.AvatarUrl != null) {
+				obj["avatar"] = user.AvatarUrl;
+			}
 
-			perf.Step("Serialize to JSON");
-			perf.End();
+			if (user.Discriminator != null) {
+				obj["tag"] = user.Discriminator;
+			}
+
+			var idStr = id.ToString();
+			userIndices[id] = users.Count;
+			userindex.Add(idStr);
+			users[idStr] = obj;
 		}
 
-		private static object GenerateUserList(IDatabaseFile db, HashSet<ulong> userIds, out List<string> userindex, out Dictionary<ulong, object> userIndices) {
-			var users = new Dictionary<string, object>();
-			userindex = new List<string>();
-			userIndices = new Dictionary<ulong, object>();
+		return users;
+	}
 
-			foreach (var user in db.GetAllUsers()) {
-				var id = user.Id;
-				if (!userIds.Contains(id)) {
-					continue;
-				}
+	private static List<object> GenerateServerList(IDatabaseFile db, HashSet<ulong> serverIds, out Dictionary<ulong, object> serverIndices) {
+		var servers = new List<object>();
+		serverIndices = new Dictionary<ulong, object>();
 
+		foreach (var server in db.GetAllServers()) {
+			var id = server.Id;
+			if (!serverIds.Contains(id)) {
+				continue;
+			}
+
+			serverIndices[id] = servers.Count;
+			servers.Add(new Dictionary<string, object> {
+				["name"] = server.Name,
+				["type"] = ServerTypes.ToJsonViewerString(server.Type),
+			});
+		}
+
+		return servers;
+	}
+
+	private static Dictionary<string, object> GenerateChannelList(List<Channel> includedChannels, Dictionary<ulong, object> serverIndices) {
+		var channels = new Dictionary<string, object>();
+
+		foreach (var channel in includedChannels) {
+			var obj = new Dictionary<string, object> {
+				["server"] = serverIndices[channel.Server],
+				["name"] = channel.Name,
+			};
+
+			if (channel.ParentId != null) {
+				obj["parent"] = channel.ParentId;
+			}
+
+			if (channel.Position != null) {
+				obj["position"] = channel.Position;
+			}
+
+			if (channel.Topic != null) {
+				obj["topic"] = channel.Topic;
+			}
+
+			if (channel.Nsfw != null) {
+				obj["nsfw"] = channel.Nsfw;
+			}
+
+			channels[channel.Id.ToString()] = obj;
+		}
+
+		return channels;
+	}
+
+	private static Dictionary<string, Dictionary<string, object>> GenerateMessageList( List<Message> includedMessages, Dictionary<ulong, object> userIndices, IViewerExportStrategy strategy) {
+		var data = new Dictionary<string, Dictionary<string, object>>();
+
+		foreach (var grouping in includedMessages.GroupBy(static message => message.Channel)) {
+			var channel = grouping.Key.ToString();
+			var channelData = new Dictionary<string, object>();
+
+			foreach (var message in grouping) {
 				var obj = new Dictionary<string, object> {
-					["name"] = user.Name
+					["u"] = userIndices[message.Sender],
+					["t"] = message.Timestamp,
 				};
 
-				if (user.AvatarUrl != null) {
-					obj["avatar"] = user.AvatarUrl;
+				if (!string.IsNullOrEmpty(message.Text)) {
+					obj["m"] = message.Text;
 				}
 
-				if (user.Discriminator != null) {
-					obj["tag"] = user.Discriminator;
+				if (message.EditTimestamp != null) {
+					obj["te"] = message.EditTimestamp;
 				}
 
-				var idStr = id.ToString();
-				userIndices[id] = users.Count;
-				userindex.Add(idStr);
-				users[idStr] = obj;
+				if (message.RepliedToId != null) {
+					obj["r"] = message.RepliedToId.Value;
+				}
+
+				if (!message.Attachments.IsEmpty) {
+					obj["a"] = message.Attachments.Select(attachment => {
+						var a = new Dictionary<string, object> {
+							{ "url", strategy.GetAttachmentUrl(attachment) },
+							{ "name", Uri.TryCreate(attachment.Url, UriKind.Absolute, out var uri) ? Path.GetFileName(uri.LocalPath) : attachment.Url },
+						};
+
+						if (attachment is { Width: not null, Height: not null }) {
+							a["width"] = attachment.Width;
+							a["height"] = attachment.Height;
+						}
+
+						return a;
+					}).ToArray();
+				}
+
+				if (!message.Embeds.IsEmpty) {
+					obj["e"] = message.Embeds.Select(static embed => embed.Json).ToArray();
+				}
+
+				if (!message.Reactions.IsEmpty) {
+					obj["re"] = message.Reactions.Select(static reaction => {
+						var r = new Dictionary<string, object>();
+
+						if (reaction.EmojiId != null) {
+							r["id"] = reaction.EmojiId.Value;
+						}
+
+						if (reaction.EmojiName != null) {
+							r["n"] = reaction.EmojiName;
+						}
+
+						r["a"] = reaction.EmojiFlags.HasFlag(EmojiFlags.Animated);
+						r["c"] = reaction.Count;
+						return r;
+					}).ToArray();
+				}
+
+				channelData[message.Id.ToString()] = obj;
 			}
 
-			return users;
+			data[channel] = channelData;
 		}
 
-		private static object GenerateServerList(IDatabaseFile db, HashSet<ulong> serverIds, out Dictionary<ulong, object> serverIndices) {
-			var servers = new List<object>();
-			serverIndices = new Dictionary<ulong, object>();
-
-			foreach (var server in db.GetAllServers()) {
-				var id = server.Id;
-				if (!serverIds.Contains(id)) {
-					continue;
-				}
-
-				serverIndices[id] = servers.Count;
-				servers.Add(new Dictionary<string, object> {
-					["name"] = server.Name,
-					["type"] = ServerTypes.ToJsonViewerString(server.Type)
-				});
-			}
-
-			return servers;
-		}
-
-		private static object GenerateChannelList(List<Channel> includedChannels, Dictionary<ulong, object> serverIndices) {
-			var channels = new Dictionary<string, object>();
-
-			foreach (var channel in includedChannels) {
-				var obj = new Dictionary<string, object> {
-					["server"] = serverIndices[channel.Server],
-					["name"] = channel.Name
-				};
-
-				if (channel.ParentId != null) {
-					obj["parent"] = channel.ParentId;
-				}
-
-				if (channel.Position != null) {
-					obj["position"] = channel.Position;
-				}
-
-				if (channel.Topic != null) {
-					obj["topic"] = channel.Topic;
-				}
-
-				if (channel.Nsfw != null) {
-					obj["nsfw"] = channel.Nsfw;
-				}
-
-				channels[channel.Id.ToString()] = obj;
-			}
-
-			return channels;
-		}
-
-		private static object GenerateMessageList( List<Message> includedMessages, Dictionary<ulong, object> userIndices, IViewerExportStrategy strategy) {
-			var data = new Dictionary<string, Dictionary<string, object>>();
-
-			foreach (var grouping in includedMessages.GroupBy(static message => message.Channel)) {
-				var channel = grouping.Key.ToString();
-				var channelData = new Dictionary<string, object>();
-
-				foreach (var message in grouping) {
-					var obj = new Dictionary<string, object> {
-						["u"] = userIndices[message.Sender],
-						["t"] = message.Timestamp
-					};
-
-					if (!string.IsNullOrEmpty(message.Text)) {
-						obj["m"] = message.Text;
-					}
-
-					if (message.EditTimestamp != null) {
-						obj["te"] = message.EditTimestamp;
-					}
-
-					if (message.RepliedToId != null) {
-						obj["r"] = message.RepliedToId.Value;
-					}
-
-					if (!message.Attachments.IsEmpty) {
-						obj["a"] = message.Attachments.Select(attachment => {
-							var a = new Dictionary<string, object> {
-								{ "url", strategy.GetAttachmentUrl(attachment) },
-								{ "name", Uri.TryCreate(attachment.Url, UriKind.Absolute, out var uri) ? Path.GetFileName(uri.LocalPath) : attachment.Url }
-							};
-
-							if (attachment.Width != null && attachment.Height != null) {
-								a["width"] = attachment.Width;
-								a["height"] = attachment.Height;
-							}
-							
-							return a;
-						}).ToArray();
-					}
-
-					if (!message.Embeds.IsEmpty) {
-						obj["e"] = message.Embeds.Select(static embed => embed.Json).ToArray();
-					}
-
-					if (!message.Reactions.IsEmpty) {
-						obj["re"] = message.Reactions.Select(static reaction => {
-							var r = new Dictionary<string, object>();
-
-							if (reaction.EmojiId != null) {
-								r["id"] = reaction.EmojiId.Value;
-							}
-
-							if (reaction.EmojiName != null) {
-								r["n"] = reaction.EmojiName;
-							}
-
-							r["a"] = reaction.EmojiFlags.HasFlag(EmojiFlags.Animated);
-							r["c"] = reaction.Count;
-							return r;
-						}).ToArray();
-					}
-
-					channelData[message.Id.ToString()] = obj;
-				}
-
-				data[channel] = channelData;
-			}
-
-			return data;
-		}
+		return data;
 	}
 }

app/Server/Database/Export/ViewerJsonSnowflakeSerializer.cs

@@ -2,14 +2,14 @@ using System;
 using System.Text.Json;
 using System.Text.Json.Serialization;
 
-namespace DHT.Server.Database.Export {
-	sealed class ViewerJsonSnowflakeSerializer : JsonConverter<ulong> {
-		public override ulong Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) {
-			return ulong.Parse(reader.GetString()!);
-		}
+namespace DHT.Server.Database.Export;
 
-		public override void Write(Utf8JsonWriter writer, ulong value, JsonSerializerOptions options) {
-			writer.WriteStringValue(value.ToString());
-		}
+sealed class ViewerJsonSnowflakeSerializer : JsonConverter<ulong> {
+	public override ulong Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) {
+		return ulong.Parse(reader.GetString()!);
+	}
+
+	public override void Write(Utf8JsonWriter writer, ulong value, JsonSerializerOptions options) {
+		writer.WriteStringValue(value.ToString());
 	}
 }

app/Server/Database/IDatabaseFile.cs

@@ -5,39 +5,39 @@ using DHT.Server.Data.Aggregations;
 using DHT.Server.Data.Filters;
 using DHT.Server.Download;
 
-namespace DHT.Server.Database {
-	public interface IDatabaseFile : IDisposable {
-		string Path { get; }
-		DatabaseStatistics Statistics { get; }
-		DatabaseStatisticsSnapshot SnapshotStatistics();
+namespace DHT.Server.Database;
 
-		void AddServer(Data.Server server);
-		List<Data.Server> GetAllServers();
+public interface IDatabaseFile : IDisposable {
+	string Path { get; }
+	DatabaseStatistics Statistics { get; }
+	DatabaseStatisticsSnapshot SnapshotStatistics();
 
-		void AddChannel(Channel channel);
-		List<Channel> GetAllChannels();
+	void AddServer(Data.Server server);
+	List<Data.Server> GetAllServers();
 
-		void AddUsers(User[] users);
-		List<User> GetAllUsers();
+	void AddChannel(Channel channel);
+	List<Channel> GetAllChannels();
 
-		void AddMessages(Message[] messages);
-		int CountMessages(MessageFilter? filter = null);
-		List<Message> GetMessages(MessageFilter? filter = null);
-		HashSet<ulong> GetMessageIds(MessageFilter? filter = null);
-		void RemoveMessages(MessageFilter filter, FilterRemovalMode mode);
+	void AddUsers(User[] users);
+	List<User> GetAllUsers();
 
-		int CountAttachments(AttachmentFilter? filter = null);
+	void AddMessages(Message[] messages);
+	int CountMessages(MessageFilter? filter = null);
+	List<Message> GetMessages(MessageFilter? filter = null);
+	HashSet<ulong> GetMessageIds(MessageFilter? filter = null);
+	void RemoveMessages(MessageFilter filter, FilterRemovalMode mode);
 
-		void AddDownload(Data.Download download);
-		List<Data.Download> GetDownloadsWithoutData();
-		Data.Download GetDownloadWithData(Data.Download download);
-		DownloadedAttachment? GetDownloadedAttachment(string url);
+	int CountAttachments(AttachmentFilter? filter = null);
 
-		void EnqueueDownloadItems(AttachmentFilter? filter = null);
-		List<DownloadItem> GetEnqueuedDownloadItems(int count);
-		void RemoveDownloadItems(DownloadItemFilter? filter, FilterRemovalMode mode);
-		DownloadStatusStatistics GetDownloadStatusStatistics();
+	void AddDownload(Data.Download download);
+	List<Data.Download> GetDownloadsWithoutData();
+	Data.Download GetDownloadWithData(Data.Download download);
+	DownloadedAttachment? GetDownloadedAttachment(string url);
 
-		void Vacuum();
-	}
+	void EnqueueDownloadItems(AttachmentFilter? filter = null);
+	List<DownloadItem> GetEnqueuedDownloadItems(int count);
+	void RemoveDownloadItems(DownloadItemFilter? filter, FilterRemovalMode mode);
+	DownloadStatusStatistics GetDownloadStatusStatistics();
+
+	void Vacuum();
 }

app/Server/Database/Import/FakeSnowflake.cs

@@ -1,21 +1,21 @@
 using System;
 
-namespace DHT.Server.Database.Import {
-	/// <summary>
-	/// https://discord.com/developers/docs/reference#snowflakes
-	/// </summary>
-	public sealed class FakeSnowflake {
-		private const ulong DiscordEpoch = 1420070400000UL;
-			
-		private ulong id;
+namespace DHT.Server.Database.Import;
 
-		public FakeSnowflake() {
-			var unixMillis = (ulong) (DateTime.UtcNow.Subtract(DateTime.UnixEpoch).Ticks / TimeSpan.TicksPerMillisecond);
-			this.id = (unixMillis - DiscordEpoch) << 22;
-		}
+/// <summary>
+/// https://discord.com/developers/docs/reference#snowflakes
+/// </summary>
+public sealed class FakeSnowflake {
+	private const ulong DiscordEpoch = 1420070400000UL;
 
-		internal ulong Next() {
-			return id++;
-		}
+	private ulong id;
+
+	public FakeSnowflake() {
+		var unixMillis = (ulong) (DateTime.UtcNow.Subtract(DateTime.UnixEpoch).Ticks / TimeSpan.TicksPerMillisecond);
+		this.id = (unixMillis - DiscordEpoch) << 22;
+	}
+
+	internal ulong Next() {
+		return id++;
 	}
 }

app/Server/Database/Import/LegacyArchiveImport.cs

@@ -12,252 +12,248 @@ using DHT.Utils.Http;
 using DHT.Utils.Logging;
 using Microsoft.AspNetCore.StaticFiles;
 
-namespace DHT.Server.Database.Import {
-	public static class LegacyArchiveImport {
-		private static readonly Log Log = Log.ForType(typeof(LegacyArchiveImport));
+namespace DHT.Server.Database.Import;
 
-		private static readonly FileExtensionContentTypeProvider ContentTypeProvider = new ();
+public static class LegacyArchiveImport {
+	private static readonly Log Log = Log.ForType(typeof(LegacyArchiveImport));
 
-		public static async Task<bool> Read(Stream stream, IDatabaseFile db, FakeSnowflake fakeSnowflake, Func<Data.Server[], Task<Dictionary<Data.Server, ulong>?>> askForServerIds) {
-			var perf = Log.Start();
-			var root = await JsonSerializer.DeserializeAsync<JsonElement>(stream);
+	private static readonly FileExtensionContentTypeProvider ContentTypeProvider = new ();
 
-			try {
-				var meta = root.RequireObject("meta");
-				var data = root.RequireObject("data");
+	public static async Task<bool> Read(Stream stream, IDatabaseFile db, FakeSnowflake fakeSnowflake, Func<Data.Server[], Task<Dictionary<Data.Server, ulong>?>> askForServerIds) {
+		var perf = Log.Start();
+		var root = await JsonSerializer.DeserializeAsync<JsonElement>(stream);
 
-				perf.Step("Deserialize JSON");
+		try {
+			var meta = root.RequireObject("meta");
+			var data = root.RequireObject("data");
 
-				var users = ReadUserList(meta);
-				var servers = ReadServerList(meta, fakeSnowflake);
+			perf.Step("Deserialize JSON");
 
-				var newServersOnly = new HashSet<Data.Server>(servers);
-				var oldServersById = db.GetAllServers().ToDictionary(static server => server.Id, static server => server);
+			var users = ReadUserList(meta);
+			var servers = ReadServerList(meta, fakeSnowflake);
 
-				var oldChannels = db.GetAllChannels();
-				var oldChannelsById = oldChannels.ToDictionary(static channel => channel.Id, static channel => channel);
+			var newServersOnly = new HashSet<Data.Server>(servers);
+			var oldServersById = db.GetAllServers().ToDictionary(static server => server.Id, static server => server);
 
-				foreach (var (channelId, serverIndex) in ReadChannelToServerIndexMapping(meta, servers)) {
-					if (oldChannelsById.TryGetValue(channelId, out var oldChannel) && oldServersById.TryGetValue(oldChannel.Server, out var oldServer) && newServersOnly.Remove(servers[serverIndex])) {
-						servers[serverIndex] = oldServer;
-					}
+			var oldChannels = db.GetAllChannels();
+			var oldChannelsById = oldChannels.ToDictionary(static channel => channel.Id, static channel => channel);
+
+			foreach (var (channelId, serverIndex) in ReadChannelToServerIndexMapping(meta, servers)) {
+				if (oldChannelsById.TryGetValue(channelId, out var oldChannel) && oldServersById.TryGetValue(oldChannel.Server, out var oldServer) && newServersOnly.Remove(servers[serverIndex])) {
+					servers[serverIndex] = oldServer;
+				}
+			}
+
+			perf.Step("Read server and user list");
+
+			if (newServersOnly.Count > 0) {
+				var askedServerIds = await askForServerIds(newServersOnly.ToArray());
+				if (askedServerIds == null) {
+					return false;
 				}
 
-				perf.Step("Read server and user list");
+				perf.Step("Ask for server IDs");
 
-				if (newServersOnly.Count > 0) {
-					var askedServerIds = await askForServerIds(newServersOnly.ToArray());
-					if (askedServerIds == null) {
-						return false;
-					}
-
-					perf.Step("Ask for server IDs");
-
-					for (var i = 0; i < servers.Length; i++) {
-						var server = servers[i];
-						if (askedServerIds.TryGetValue(server, out var serverId)) {
-							servers[i] = new Data.Server {
-								Id = serverId,
-								Name = server.Name,
-								Type = server.Type
-							};
-						}
+				for (var i = 0; i < servers.Length; i++) {
+					var server = servers[i];
+					if (askedServerIds.TryGetValue(server, out var serverId)) {
+						servers[i] = server with { Id = serverId };
 					}
 				}
-
-				var channels = ReadChannelList(meta, servers);
-
-				perf.Step("Read channel list");
-
-				var oldMessageIds = db.GetMessageIds();
-				var newMessages = channels.SelectMany(channel => ReadMessages(data, channel, users, fakeSnowflake))
-				                          .Where(message => !oldMessageIds.Contains(message.Id))
-				                          .ToArray();
-
-				perf.Step("Read messages");
-
-				db.AddUsers(users);
-				db.AddServers(servers);
-				db.AddChannels(channels);
-				db.AddMessages(newMessages);
-
-				perf.Step("Import into database");
-			} catch (HttpException e) {
-				throw new JsonException(e.Message);
 			}
 
-			perf.End();
-			return true;
+			var channels = ReadChannelList(meta, servers);
+
+			perf.Step("Read channel list");
+
+			var oldMessageIds = db.GetMessageIds();
+			var newMessages = channels.SelectMany(channel => ReadMessages(data, channel, users, fakeSnowflake))
+			                          .Where(message => !oldMessageIds.Contains(message.Id))
+			                          .ToArray();
+
+			perf.Step("Read messages");
+
+			db.AddUsers(users);
+			db.AddServers(servers);
+			db.AddChannels(channels);
+			db.AddMessages(newMessages);
+
+			perf.Step("Import into database");
+		} catch (HttpException e) {
+			throw new JsonException(e.Message);
 		}
 
-		private static User[] ReadUserList(JsonElement meta) {
-			const string UsersPath = "meta.users[]";
+		perf.End();
+		return true;
+	}
 
-			static ulong ParseUserIndex(JsonElement element, int index) {
-				return ulong.Parse(element.GetString() ?? throw new JsonException("Expected key 'meta.userindex[" + index + "]' to be a string."));
-			}
+	private static User[] ReadUserList(JsonElement meta) {
+		const string UsersPath = "meta.users[]";
 
-			var userindex = meta.RequireArray("userindex", "meta")
-			                    .Select(static (item, index) => (ParseUserIndex(item, index), index))
-			                    .ToDictionary();
-
-			var users = new User[userindex.Count];
-
-			foreach (var item in meta.RequireObject("users", "meta").EnumerateObject()) {
-				var path = UsersPath + "." + item.Name;
-				var userId = ulong.Parse(item.Name);
-				var userObj = item.Value;
-
-				users[userindex[userId]] = new User {
-					Id = userId,
-					Name = userObj.RequireString("name", path),
-					AvatarUrl = userObj.HasKey("avatar") ? userObj.RequireString("avatar", path) : null,
-					Discriminator = userObj.HasKey("tag") ? userObj.RequireString("tag", path) : null
-				};
-			}
-
-			return users;
+		static ulong ParseUserIndex(JsonElement element, int index) {
+			return ulong.Parse(element.GetString() ?? throw new JsonException("Expected key 'meta.userindex[" + index + "]' to be a string."));
 		}
 
-		private static Data.Server[] ReadServerList(JsonElement meta, FakeSnowflake fakeSnowflake) {
-			const string ServersPath = "meta.servers[]";
+		var userindex = meta.RequireArray("userindex", "meta")
+		                    .Select(static (item, index) => (ParseUserIndex(item, index), index))
+		                    .ToDictionary();
 
-			return meta.RequireArray("servers", "meta").Select(serverObj => new Data.Server {
+		var users = new User[userindex.Count];
+
+		foreach (var item in meta.RequireObject("users", "meta").EnumerateObject()) {
+			var path = UsersPath + "." + item.Name;
+			var userId = ulong.Parse(item.Name);
+			var userObj = item.Value;
+
+			users[userindex[userId]] = new User {
+				Id = userId,
+				Name = userObj.RequireString("name", path),
+				AvatarUrl = userObj.HasKey("avatar") ? userObj.RequireString("avatar", path) : null,
+				Discriminator = userObj.HasKey("tag") ? userObj.RequireString("tag", path) : null,
+			};
+		}
+
+		return users;
+	}
+
+	private static Data.Server[] ReadServerList(JsonElement meta, FakeSnowflake fakeSnowflake) {
+		const string ServersPath = "meta.servers[]";
+
+		return meta.RequireArray("servers", "meta").Select(serverObj => new Data.Server {
+			Id = fakeSnowflake.Next(),
+			Name = serverObj.RequireString("name", ServersPath),
+			Type = ServerTypes.FromString(serverObj.RequireString("type", ServersPath)),
+		}).ToArray();
+	}
+
+	private const string ChannelsPath = "meta.channels";
+
+	private static Dictionary<ulong, int> ReadChannelToServerIndexMapping(JsonElement meta, Data.Server[] servers) {
+		return meta.RequireObject("channels", "meta").EnumerateObject().Select(item => {
+			var path = ChannelsPath + "." + item.Name;
+			var channelId = ulong.Parse(item.Name);
+			var channelObj = item.Value;
+
+			return (channelId, channelObj.RequireInt("server", path, min: 0, max: servers.Length - 1));
+		}).ToDictionary();
+	}
+
+	private static Channel[] ReadChannelList(JsonElement meta, Data.Server[] servers) {
+		return meta.RequireObject("channels", "meta").EnumerateObject().Select(item => {
+			var path = ChannelsPath + "." + item.Name;
+			var channelId = ulong.Parse(item.Name);
+			var channelObj = item.Value;
+
+			return new Channel {
+				Id = channelId,
+				Server = servers[channelObj.RequireInt("server", path, min: 0, max: servers.Length - 1)].Id,
+				Name = channelObj.RequireString("name", path),
+				Position = channelObj.HasKey("position") ? channelObj.RequireInt("position", path, min: 0) : null,
+				Topic = channelObj.HasKey("topic") ? channelObj.RequireString("topic", path) : null,
+				Nsfw = channelObj.HasKey("nsfw") ? channelObj.RequireBool("nsfw", path) : null,
+			};
+		}).ToArray();
+	}
+
+	private static Message[] ReadMessages(JsonElement data, Channel channel, User[] users, FakeSnowflake fakeSnowflake) {
+		const string DataPath = "data";
+
+		var channelId = channel.Id;
+		var channelIdStr = channelId.ToString();
+
+		var messagesObj = data.HasKey(channelIdStr) ? data.RequireObject(channelIdStr, DataPath) : (JsonElement?) null;
+		if (messagesObj == null) {
+			return Array.Empty<Message>();
+		}
+
+		return messagesObj.Value.EnumerateObject().Select(item => {
+			var path = DataPath + "." + item.Name;
+			var messageId = ulong.Parse(item.Name);
+			var messageObj = item.Value;
+
+			return new Message {
+				Id = messageId,
+				Sender = users[messageObj.RequireInt("u", path, min: 0, max: users.Length - 1)].Id,
+				Channel = channelId,
+				Text = messageObj.HasKey("m") ? messageObj.RequireString("m", path) : string.Empty,
+				Timestamp = messageObj.RequireLong("t", path),
+				EditTimestamp = messageObj.HasKey("te") ? messageObj.RequireLong("te", path) : null,
+				RepliedToId = messageObj.HasKey("r") ? messageObj.RequireSnowflake("r", path) : null,
+				Attachments = messageObj.HasKey("a") ? ReadMessageAttachments(messageObj.RequireArray("a", path), fakeSnowflake, path + ".a[]").ToImmutableArray() : ImmutableArray<Attachment>.Empty,
+				Embeds = messageObj.HasKey("e") ? ReadMessageEmbeds(messageObj.RequireArray("e", path), path + ".e[]").ToImmutableArray() : ImmutableArray<Embed>.Empty,
+				Reactions = messageObj.HasKey("re") ? ReadMessageReactions(messageObj.RequireArray("re", path), path + ".re[]").ToImmutableArray() : ImmutableArray<Reaction>.Empty,
+			};
+		}).ToArray();
+	}
+
+	[SuppressMessage("ReSharper", "ConvertToLambdaExpression")]
+	private static IEnumerable<Attachment> ReadMessageAttachments(JsonElement.ArrayEnumerator attachmentsArray, FakeSnowflake fakeSnowflake, string path) {
+		return attachmentsArray.Select(attachmentObj => {
+			string url = attachmentObj.RequireString("url", path);
+			string name = url[(url.LastIndexOf('/') + 1)..];
+			string? type = ContentTypeProvider.TryGetContentType(name, out var contentType) ? contentType : null;
+
+			return new Attachment {
 				Id = fakeSnowflake.Next(),
-				Name = serverObj.RequireString("name", ServersPath),
-				Type = ServerTypes.FromString(serverObj.RequireString("type", ServersPath))
-			}).ToArray();
-		}
+				Name = name,
+				Type = type,
+				Url = url,
+				Size = 0, // unknown size
+			};
+		}).DistinctByKeyStable(static attachment => {
+			// Some Discord messages have duplicate attachments with the same id for unknown reasons.
+			return attachment.Id;
+		});
+	}
 
-		private const string ChannelsPath = "meta.channels";
+	private static IEnumerable<Embed> ReadMessageEmbeds(JsonElement.ArrayEnumerator embedsArray, string path) {
+		// Some rich embeds are missing URLs which causes a missing 'url' key.
+		return embedsArray.Where(static embedObj => embedObj.HasKey("url")).Select(embedObj => {
+			string url = embedObj.RequireString("url", path);
+			string type = embedObj.RequireString("type", path);
 
-		private static Dictionary<ulong, int> ReadChannelToServerIndexMapping(JsonElement meta, Data.Server[] servers) {
-			return meta.RequireObject("channels", "meta").EnumerateObject().Select(item => {
-				var path = ChannelsPath + "." + item.Name;
-				var channelId = ulong.Parse(item.Name);
-				var channelObj = item.Value;
+			var embedJson = new Dictionary<string, object> {
+				{ "url", url },
+				{ "type", type },
+				{ "dht_legacy", true },
+			};
 
-				return (channelId, channelObj.RequireInt("server", path, min: 0, max: servers.Length - 1));
-			}).ToDictionary();
-		}
-
-		private static Channel[] ReadChannelList(JsonElement meta, Data.Server[] servers) {
-			return meta.RequireObject("channels", "meta").EnumerateObject().Select(item => {
-				var path = ChannelsPath + "." + item.Name;
-				var channelId = ulong.Parse(item.Name);
-				var channelObj = item.Value;
-
-				return new Channel {
-					Id = channelId,
-					Server = servers[channelObj.RequireInt("server", path, min: 0, max: servers.Length - 1)].Id,
-					Name = channelObj.RequireString("name", path),
-					Position = channelObj.HasKey("position") ? channelObj.RequireInt("position", path, min: 0) : null,
-					Topic = channelObj.HasKey("topic") ? channelObj.RequireString("topic", path) : null,
-					Nsfw = channelObj.HasKey("nsfw") ? channelObj.RequireBool("nsfw", path) : null
+			if (type == "image") {
+				embedJson["image"] = new Dictionary<string, string> {
+					{ "url", url }
 				};
-			}).ToArray();
-		}
+			}
+			else if (type == "rich") {
+				if (embedObj.HasKey("t")) {
+					embedJson["title"] = embedObj.RequireString("t", path);
+				}
 
-		private static Message[] ReadMessages(JsonElement data, Channel channel, User[] users, FakeSnowflake fakeSnowflake) {
-			const string DataPath = "data";
-
-			var channelId = channel.Id;
-			var channelIdStr = channelId.ToString();
-
-			var messagesObj = data.HasKey(channelIdStr) ? data.RequireObject(channelIdStr, DataPath) : (JsonElement?) null;
-			if (messagesObj == null) {
-				return Array.Empty<Message>();
+				if (embedObj.HasKey("d")) {
+					embedJson["description"] = embedObj.RequireString("d", path);
+				}
 			}
 
-			return messagesObj.Value.EnumerateObject().Select(item => {
-				var path = DataPath + "." + item.Name;
-				var messageId = ulong.Parse(item.Name);
-				var messageObj = item.Value;
+			return new Embed {
+				Json = JsonSerializer.Serialize(embedJson)
+			};
+		});
+	}
 
-				return new Message {
-					Id = messageId,
-					Sender = users[messageObj.RequireInt("u", path, min: 0, max: users.Length - 1)].Id,
-					Channel = channelId,
-					Text = messageObj.HasKey("m") ? messageObj.RequireString("m", path) : string.Empty,
-					Timestamp = messageObj.RequireLong("t", path),
-					EditTimestamp = messageObj.HasKey("te") ? messageObj.RequireLong("te", path) : null,
-					RepliedToId = messageObj.HasKey("r") ? messageObj.RequireSnowflake("r", path) : null,
-					Attachments = messageObj.HasKey("a") ? ReadMessageAttachments(messageObj.RequireArray("a", path), fakeSnowflake, path + ".a[]").ToImmutableArray() : ImmutableArray<Attachment>.Empty,
-					Embeds = messageObj.HasKey("e") ? ReadMessageEmbeds(messageObj.RequireArray("e", path), path + ".e[]").ToImmutableArray() : ImmutableArray<Embed>.Empty,
-					Reactions = messageObj.HasKey("re") ? ReadMessageReactions(messageObj.RequireArray("re", path), path + ".re[]").ToImmutableArray() : ImmutableArray<Reaction>.Empty
-				};
-			}).ToArray();
-		}
+	private static IEnumerable<Reaction> ReadMessageReactions(JsonElement.ArrayEnumerator reactionsArray, string path) {
+		return reactionsArray.Select(reactionObj => {
+			var id = reactionObj.HasKey("id") ? reactionObj.RequireSnowflake("id", path) : (ulong?) null;
+			var name = reactionObj.HasKey("n") ? reactionObj.RequireString("n", path) : null;
 
-		[SuppressMessage("ReSharper", "ConvertToLambdaExpression")]
-		private static IEnumerable<Attachment> ReadMessageAttachments(JsonElement.ArrayEnumerator attachmentsArray, FakeSnowflake fakeSnowflake, string path) {
-			return attachmentsArray.Select(attachmentObj => {
-				string url = attachmentObj.RequireString("url", path);
-				string name = url[(url.LastIndexOf('/') + 1)..];
-				string? type = ContentTypeProvider.TryGetContentType(name, out var contentType) ? contentType : null;
+			if (id == null && name == null) {
+				throw new JsonException("Expected key '" + path + ".id' and/or '" + path + ".n' to be present.");
+			}
 
-				return new Attachment {
-					Id = fakeSnowflake.Next(),
-					Name = name,
-					Type = type,
-					Url = url,
-					Size = 0 // unknown size
-				};
-			}).DistinctByKeyStable(static attachment => {
-				// Some Discord messages have duplicate attachments with the same id for unknown reasons.
-				return attachment.Id;
-			});
-		}
-
-		private static IEnumerable<Embed> ReadMessageEmbeds(JsonElement.ArrayEnumerator embedsArray, string path) {
-			// Some rich embeds are missing URLs which causes a missing 'url' key.
-			return embedsArray.Where(static embedObj => embedObj.HasKey("url")).Select(embedObj => {
-				string url = embedObj.RequireString("url", path);
-				string type = embedObj.RequireString("type", path);
-
-				var embedJson = new Dictionary<string, object> {
-					{ "url", url },
-					{ "type", type },
-					{ "dht_legacy", true }
-				};
-
-				if (type == "image") {
-					embedJson["image"] = new Dictionary<string, string> {
-						{ "url", url }
-					};
-				}
-				else if (type == "rich") {
-					if (embedObj.HasKey("t")) {
-						embedJson["title"] = embedObj.RequireString("t", path);
-					}
-
-					if (embedObj.HasKey("d")) {
-						embedJson["description"] = embedObj.RequireString("d", path);
-					}
-				}
-
-				return new Embed {
-					Json = JsonSerializer.Serialize(embedJson)
-				};
-			});
-		}
-
-		private static IEnumerable<Reaction> ReadMessageReactions(JsonElement.ArrayEnumerator reactionsArray, string path) {
-			return reactionsArray.Select(reactionObj => {
-				var id = reactionObj.HasKey("id") ? reactionObj.RequireSnowflake("id", path) : (ulong?) null;
-				var name = reactionObj.HasKey("n") ? reactionObj.RequireString("n", path) : null;
-
-				if (id == null && name == null) {
-					throw new JsonException("Expected key '" + path + ".id' and/or '" + path + ".n' to be present.");
-				}
-
-				return new Reaction {
-					EmojiId = id,
-					EmojiName = name,
-					EmojiFlags = reactionObj.HasKey("an") && reactionObj.RequireBool("an", path) ? EmojiFlags.Animated : EmojiFlags.None,
-					Count = reactionObj.RequireInt("c", path, min: 0)
-				};
-			});
-		}
+			return new Reaction {
+				EmojiId = id,
+				EmojiName = name,
+				EmojiFlags = reactionObj.HasKey("an") && reactionObj.RequireBool("an", path) ? EmojiFlags.Animated : EmojiFlags.None,
+				Count = reactionObj.RequireInt("c", path, min: 0),
+			};
+		});
 	}
 }

app/Server/Database/Sqlite/Schema.cs

@@ -4,60 +4,61 @@ using DHT.Server.Database.Exceptions;
 using DHT.Server.Database.Sqlite.Utils;
 using DHT.Utils.Logging;
 
-namespace DHT.Server.Database.Sqlite {
-	sealed class Schema {
-		internal const int Version = 5;
+namespace DHT.Server.Database.Sqlite;
 
-		private static readonly Log Log = Log.ForType<Schema>();
+sealed class Schema {
+	internal const int Version = 5;
 
-		private readonly ISqliteConnection conn;
+	private static readonly Log Log = Log.ForType<Schema>();
 
-		public Schema(ISqliteConnection conn) {
-			this.conn = conn;
+	private readonly ISqliteConnection conn;
+
+	public Schema(ISqliteConnection conn) {
+		this.conn = conn;
+	}
+
+	private void Execute(string sql) {
+		conn.Command(sql).ExecuteNonQuery();
+	}
+
+	public async Task<bool> Setup(Func<Task<bool>> checkCanUpgradeSchemas) {
+		Execute(@"CREATE TABLE IF NOT EXISTS metadata (key TEXT PRIMARY KEY, value TEXT)");
+
+		var dbVersionStr = conn.SelectScalar("SELECT value FROM metadata WHERE key = 'version'");
+		if (dbVersionStr == null) {
+			InitializeSchemas();
+		}
+		else if (!int.TryParse(dbVersionStr.ToString(), out int dbVersion) || dbVersion < 1) {
+			throw new InvalidDatabaseVersionException(dbVersionStr.ToString() ?? "<null>");
+		}
+		else if (dbVersion > Version) {
+			throw new DatabaseTooNewException(dbVersion);
+		}
+		else if (dbVersion < Version) {
+			var proceed = await checkCanUpgradeSchemas();
+			if (!proceed) {
+				return false;
+			}
+
+			UpgradeSchemas(dbVersion);
 		}
 
-		private void Execute(string sql) {
-			conn.Command(sql).ExecuteNonQuery();
-		}
+		return true;
+	}
 
-		public async Task<bool> Setup(Func<Task<bool>> checkCanUpgradeSchemas) {
-			Execute(@"CREATE TABLE IF NOT EXISTS metadata (key TEXT PRIMARY KEY, value TEXT)");
-
-			var dbVersionStr = conn.SelectScalar("SELECT value FROM metadata WHERE key = 'version'");
-			if (dbVersionStr == null) {
-				InitializeSchemas();
-			}
-			else if (!int.TryParse(dbVersionStr.ToString(), out int dbVersion) || dbVersion < 1) {
-				throw new InvalidDatabaseVersionException(dbVersionStr.ToString() ?? "<null>");
-			}
-			else if (dbVersion > Version) {
-				throw new DatabaseTooNewException(dbVersion);
-			}
-			else if (dbVersion < Version) {
-				var proceed = await checkCanUpgradeSchemas();
-				if (!proceed) {
-					return false;
-				}
-
-				UpgradeSchemas(dbVersion);
-			}
-
-			return true;
-		}
-
-		private void InitializeSchemas() {
-			Execute(@"CREATE TABLE users (
+	private void InitializeSchemas() {
+		Execute(@"CREATE TABLE users (
 			          id INTEGER PRIMARY KEY NOT NULL,
 			          name TEXT NOT NULL,
 			          avatar_url TEXT,
 			          discriminator TEXT)");
 
-			Execute(@"CREATE TABLE servers (
+		Execute(@"CREATE TABLE servers (
 			          id INTEGER PRIMARY KEY NOT NULL,
 			          name TEXT NOT NULL,
 			          type TEXT NOT NULL)");
 
-			Execute(@"CREATE TABLE channels (
+		Execute(@"CREATE TABLE channels (
 			          id INTEGER PRIMARY KEY NOT NULL,
 			          server INTEGER NOT NULL,
 			          name TEXT NOT NULL,
@@ -66,14 +67,14 @@ namespace DHT.Server.Database.Sqlite {
 			          topic TEXT,
 			          nsfw INTEGER)");
 
-			Execute(@"CREATE TABLE messages (
+		Execute(@"CREATE TABLE messages (
 			        message_id INTEGER PRIMARY KEY NOT NULL,
 			        sender_id INTEGER NOT NULL,
 			        channel_id INTEGER NOT NULL,
 			        text TEXT NOT NULL,
 			        timestamp INTEGER NOT NULL)");
 
-			Execute(@"CREATE TABLE attachments (
+		Execute(@"CREATE TABLE attachments (
 			        message_id INTEGER NOT NULL,
 			        attachment_id INTEGER NOT NULL PRIMARY KEY NOT NULL,
 			        name TEXT NOT NULL,
@@ -83,91 +84,90 @@ namespace DHT.Server.Database.Sqlite {
 			        width INTEGER,
 			        height INTEGER)");
 
-			Execute(@"CREATE TABLE embeds (
+		Execute(@"CREATE TABLE embeds (
 			        message_id INTEGER NOT NULL,
 			        json TEXT NOT NULL)");
 
-			Execute(@"CREATE TABLE reactions (
+		Execute(@"CREATE TABLE reactions (
 					message_id INTEGER NOT NULL,
 					emoji_id INTEGER,
 					emoji_name TEXT,
 					emoji_flags INTEGER NOT NULL,
 					count INTEGER NOT NULL)");
 
-			CreateMessageEditTimestampTable();
-			CreateMessageRepliedToTable();
-			CreateDownloadsTable();
+		CreateMessageEditTimestampTable();
+		CreateMessageRepliedToTable();
+		CreateDownloadsTable();
 
-			Execute("CREATE INDEX attachments_message_ix ON attachments(message_id)");
-			Execute("CREATE INDEX embeds_message_ix ON embeds(message_id)");
-			Execute("CREATE INDEX reactions_message_ix ON reactions(message_id)");
+		Execute("CREATE INDEX attachments_message_ix ON attachments(message_id)");
+		Execute("CREATE INDEX embeds_message_ix ON embeds(message_id)");
+		Execute("CREATE INDEX reactions_message_ix ON reactions(message_id)");
 
-			Execute("INSERT INTO metadata (key, value) VALUES ('version', " + Version + ")");
-		}
+		Execute("INSERT INTO metadata (key, value) VALUES ('version', " + Version + ")");
+	}
 
-		private void CreateMessageEditTimestampTable() {
-			Execute(@"CREATE TABLE edit_timestamps (
+	private void CreateMessageEditTimestampTable() {
+		Execute(@"CREATE TABLE edit_timestamps (
 			        message_id INTEGER PRIMARY KEY NOT NULL,
 			        edit_timestamp INTEGER NOT NULL)");
-		}
+	}
 
-		private void CreateMessageRepliedToTable() {
-			Execute(@"CREATE TABLE replied_to (
+	private void CreateMessageRepliedToTable() {
+		Execute(@"CREATE TABLE replied_to (
 			        message_id INTEGER PRIMARY KEY NOT NULL,
 			        replied_to_id INTEGER NOT NULL)");
-		}
+	}
 
-		private void CreateDownloadsTable() {
-			Execute(@"CREATE TABLE downloads (
+	private void CreateDownloadsTable() {
+		Execute(@"CREATE TABLE downloads (
                       url TEXT NOT NULL PRIMARY KEY,
                       status INTEGER NOT NULL,
                       size INTEGER NOT NULL,
                       blob BLOB)");
+	}
+
+	private void UpgradeSchemas(int dbVersion) {
+		var perf = Log.Start("from version " + dbVersion);
+
+		Execute("UPDATE metadata SET value = " + Version + " WHERE key = 'version'");
+
+		if (dbVersion <= 1) {
+			Execute("ALTER TABLE channels ADD parent_id INTEGER");
+			perf.Step("Upgrade to version 2");
 		}
 
-		private void UpgradeSchemas(int dbVersion) {
-			var perf = Log.Start("from version " + dbVersion);
+		if (dbVersion <= 2) {
+			CreateMessageEditTimestampTable();
+			CreateMessageRepliedToTable();
 
-			Execute("UPDATE metadata SET value = " + Version + " WHERE key = 'version'");
-
-			if (dbVersion <= 1) {
-				Execute("ALTER TABLE channels ADD parent_id INTEGER");
-				perf.Step("Upgrade to version 2");
-			}
-
-			if (dbVersion <= 2) {
-				CreateMessageEditTimestampTable();
-				CreateMessageRepliedToTable();
-
-				Execute(@"INSERT INTO edit_timestamps (message_id, edit_timestamp)
+			Execute(@"INSERT INTO edit_timestamps (message_id, edit_timestamp)
 						SELECT message_id, edit_timestamp FROM messages
 						WHERE edit_timestamp IS NOT NULL");
 
-				Execute(@"INSERT INTO replied_to (message_id, replied_to_id)
+			Execute(@"INSERT INTO replied_to (message_id, replied_to_id)
 						SELECT message_id, replied_to_id FROM messages
 						WHERE replied_to_id IS NOT NULL");
 
-				Execute("ALTER TABLE messages DROP COLUMN replied_to_id");
-				Execute("ALTER TABLE messages DROP COLUMN edit_timestamp");
+			Execute("ALTER TABLE messages DROP COLUMN replied_to_id");
+			Execute("ALTER TABLE messages DROP COLUMN edit_timestamp");
 
-				perf.Step("Upgrade to version 3");
+			perf.Step("Upgrade to version 3");
 
-				Execute("VACUUM");
-				perf.Step("Vacuum");
-			}
-
-			if (dbVersion <= 3) {
-				CreateDownloadsTable();
-				perf.Step("Upgrade to version 4");
-			}
-
-			if (dbVersion <= 4) {
-				Execute("ALTER TABLE attachments ADD width INTEGER");
-				Execute("ALTER TABLE attachments ADD height INTEGER");
-				perf.Step("Upgrade to version 5");
-			}
-
-			perf.End();
+			Execute("VACUUM");
+			perf.Step("Vacuum");
 		}
+
+		if (dbVersion <= 3) {
+			CreateDownloadsTable();
+			perf.Step("Upgrade to version 4");
+		}
+
+		if (dbVersion <= 4) {
+			Execute("ALTER TABLE attachments ADD width INTEGER");
+			Execute("ALTER TABLE attachments ADD height INTEGER");
+			perf.Step("Upgrade to version 5");
+		}
+
+		perf.End();
 	}
 }

app/Server/Database/Sqlite/SqliteFilters.cs

@@ -5,79 +5,79 @@ using DHT.Server.Data;
 using DHT.Server.Data.Filters;
 using DHT.Server.Database.Sqlite.Utils;
 
-namespace DHT.Server.Database.Sqlite {
-	static class SqliteFilters {
-		public static string GenerateWhereClause(this MessageFilter? filter, string? tableAlias = null, bool invert = false) {
-			if (filter == null) {
-				return "";
-			}
+namespace DHT.Server.Database.Sqlite;
 
-			var where = new SqliteWhereGenerator(tableAlias, invert);
-
-			if (filter.StartDate != null) {
-				where.AddCondition("timestamp >= " + new DateTimeOffset(filter.StartDate.Value).ToUnixTimeMilliseconds());
-			}
-
-			if (filter.EndDate != null) {
-				where.AddCondition("timestamp <= " + new DateTimeOffset(filter.EndDate.Value).ToUnixTimeMilliseconds());
-			}
-
-			if (filter.ChannelIds != null) {
-				where.AddCondition("channel_id IN (" + string.Join(",", filter.ChannelIds) + ")");
-			}
-
-			if (filter.UserIds != null) {
-				where.AddCondition("sender_id IN (" + string.Join(",", filter.UserIds) + ")");
-			}
-
-			if (filter.MessageIds != null) {
-				where.AddCondition("message_id IN (" + string.Join(",", filter.MessageIds) + ")");
-			}
-
-			return where.Generate();
+static class SqliteFilters {
+	public static string GenerateWhereClause(this MessageFilter? filter, string? tableAlias = null, bool invert = false) {
+		if (filter == null) {
+			return "";
 		}
 
-		public static string GenerateWhereClause(this AttachmentFilter? filter, string? tableAlias = null, bool invert = false) {
-			if (filter == null) {
-				return "";
-			}
+		var where = new SqliteWhereGenerator(tableAlias, invert);
 
-			var where = new SqliteWhereGenerator(tableAlias, invert);
-
-			if (filter.MaxBytes != null) {
-				where.AddCondition("size <= " + filter.MaxBytes);
-			}
-
-			if (filter.DownloadItemRule == AttachmentFilter.DownloadItemRules.OnlyNotPresent) {
-				where.AddCondition("url NOT IN (SELECT url FROM downloads)");
-			}
-			else if (filter.DownloadItemRule == AttachmentFilter.DownloadItemRules.OnlyPresent) {
-				where.AddCondition("url IN (SELECT url FROM downloads)");
-			}
-			
-			return where.Generate();
+		if (filter.StartDate != null) {
+			where.AddCondition("timestamp >= " + new DateTimeOffset(filter.StartDate.Value).ToUnixTimeMilliseconds());
 		}
 
-		public static string GenerateWhereClause(this DownloadItemFilter? filter, string? tableAlias = null, bool invert = false) {
-			if (filter == null) {
-				return "";
-			}
-
-			var where = new SqliteWhereGenerator(tableAlias, invert);
-
-			if (filter.IncludeStatuses != null) {
-				where.AddCondition("status IN (" + filter.IncludeStatuses.In() + ")");
-			}
-
-			if (filter.ExcludeStatuses != null) {
-				where.AddCondition("status NOT IN (" + filter.ExcludeStatuses.In() + ")");
-			}
-
-			return where.Generate();
+		if (filter.EndDate != null) {
+			where.AddCondition("timestamp <= " + new DateTimeOffset(filter.EndDate.Value).ToUnixTimeMilliseconds());
 		}
 
-		private static string In(this ISet<DownloadStatus> statuses) {
-			return string.Join(",", statuses.Select(static status => (int) status));
+		if (filter.ChannelIds != null) {
+			where.AddCondition("channel_id IN (" + string.Join(",", filter.ChannelIds) + ")");
 		}
+
+		if (filter.UserIds != null) {
+			where.AddCondition("sender_id IN (" + string.Join(",", filter.UserIds) + ")");
+		}
+
+		if (filter.MessageIds != null) {
+			where.AddCondition("message_id IN (" + string.Join(",", filter.MessageIds) + ")");
+		}
+
+		return where.Generate();
+	}
+
+	public static string GenerateWhereClause(this AttachmentFilter? filter, string? tableAlias = null, bool invert = false) {
+		if (filter == null) {
+			return "";
+		}
+
+		var where = new SqliteWhereGenerator(tableAlias, invert);
+
+		if (filter.MaxBytes != null) {
+			where.AddCondition("size <= " + filter.MaxBytes);
+		}
+
+		if (filter.DownloadItemRule == AttachmentFilter.DownloadItemRules.OnlyNotPresent) {
+			where.AddCondition("url NOT IN (SELECT url FROM downloads)");
+		}
+		else if (filter.DownloadItemRule == AttachmentFilter.DownloadItemRules.OnlyPresent) {
+			where.AddCondition("url IN (SELECT url FROM downloads)");
+		}
+
+		return where.Generate();
+	}
+
+	public static string GenerateWhereClause(this DownloadItemFilter? filter, string? tableAlias = null, bool invert = false) {
+		if (filter == null) {
+			return "";
+		}
+
+		var where = new SqliteWhereGenerator(tableAlias, invert);
+
+		if (filter.IncludeStatuses != null) {
+			where.AddCondition("status IN (" + filter.IncludeStatuses.In() + ")");
+		}
+
+		if (filter.ExcludeStatuses != null) {
+			where.AddCondition("status NOT IN (" + filter.ExcludeStatuses.In() + ")");
+		}
+
+		return where.Generate();
+	}
+
+	private static string In(this ISet<DownloadStatus> statuses) {
+		return string.Join(",", statuses.Select(static status => (int) status));
 	}
 }

app/Server/Database/Sqlite/Utils/ISqliteConnection.cs

@@ -1,8 +1,8 @@
 using System;
 using Microsoft.Data.Sqlite;
 
-namespace DHT.Server.Database.Sqlite.Utils {
-	interface ISqliteConnection : IDisposable {
-		SqliteConnection InnerConnection { get; }
-	}
+namespace DHT.Server.Database.Sqlite.Utils;
+
+interface ISqliteConnection : IDisposable {
+	SqliteConnection InnerConnection { get; }
 }

app/Server/Database/Sqlite/Utils/SqliteConnectionPool.cs

@@ -5,112 +5,110 @@ using System.Threading;
 using DHT.Utils.Logging;
 using Microsoft.Data.Sqlite;
 
-namespace DHT.Server.Database.Sqlite.Utils {
-	sealed class SqliteConnectionPool : IDisposable {
-		private static string GetConnectionString(SqliteConnectionStringBuilder connectionStringBuilder) {
-			connectionStringBuilder.Pooling = false;
-			return connectionStringBuilder.ToString();
-		}
+namespace DHT.Server.Database.Sqlite.Utils;
 
-		private readonly object monitor = new ();
-		private readonly Random rand = new ();
-		private volatile bool isDisposed;
+sealed class SqliteConnectionPool : IDisposable {
+	private static string GetConnectionString(SqliteConnectionStringBuilder connectionStringBuilder) {
+		connectionStringBuilder.Pooling = false;
+		return connectionStringBuilder.ToString();
+	}
 
-		private readonly BlockingCollection<PooledConnection> free = new (new ConcurrentStack<PooledConnection>());
-		private readonly List<PooledConnection> used;
+	private readonly object monitor = new ();
+	private readonly Random rand = new ();
+	private volatile bool isDisposed;
 
-		public SqliteConnectionPool(SqliteConnectionStringBuilder connectionStringBuilder, int poolSize) {
-			var connectionString = GetConnectionString(connectionStringBuilder);
+	private readonly BlockingCollection<PooledConnection> free = new (new ConcurrentStack<PooledConnection>());
+	private readonly List<PooledConnection> used;
 
-			for (int i = 0; i < poolSize; i++) {
-				var conn = new SqliteConnection(connectionString);
-				conn.Open();
-				
-				var pooledConn = new PooledConnection(this, conn);
-				
-				using (var cmd = pooledConn.Command("PRAGMA journal_mode=WAL")) {
-					cmd.ExecuteNonQuery();
-				}
-				
-				free.Add(pooledConn);
+	public SqliteConnectionPool(SqliteConnectionStringBuilder connectionStringBuilder, int poolSize) {
+		var connectionString = GetConnectionString(connectionStringBuilder);
+
+		for (int i = 0; i < poolSize; i++) {
+			var conn = new SqliteConnection(connectionString);
+			conn.Open();
+
+			var pooledConn = new PooledConnection(this, conn);
+
+			using (var cmd = pooledConn.Command("PRAGMA journal_mode=WAL")) {
+				cmd.ExecuteNonQuery();
 			}
 
-			used = new List<PooledConnection>(poolSize);
+			free.Add(pooledConn);
 		}
 
-		private void ThrowIfDisposed() {
-			if (isDisposed) {
-				throw new ObjectDisposedException(nameof(SqliteConnectionPool));
-			}
-		}
+		used = new List<PooledConnection>(poolSize);
+	}
 
-		public ISqliteConnection Take() {
-			while (true) {
-				ThrowIfDisposed();
-				
-				lock (monitor) {
-					if (free.TryTake(out var conn)) {
-						used.Add(conn);
-						return conn;
-					}
-					else {
-						Log.ForType<SqliteConnectionPool>().Warn("Thread " + Thread.CurrentThread.ManagedThreadId + " is starving for connections.");
-					}
-				}
-				
-				Thread.Sleep(TimeSpan.FromMilliseconds(rand.Next(100, 200)));
-			}
-		}
+	private void ThrowIfDisposed() {
+		ObjectDisposedException.ThrowIf(isDisposed, nameof(SqliteConnectionPool));
+	}
 
-		private void Return(PooledConnection conn) {
+	public ISqliteConnection Take() {
+		while (true) {
 			ThrowIfDisposed();
 
 			lock (monitor) {
-				if (used.Remove(conn)) {
-					free.Add(conn);
+				if (free.TryTake(out var conn)) {
+					used.Add(conn);
+					return conn;
+				}
+				else {
+					Log.ForType<SqliteConnectionPool>().Warn("Thread " + Environment.CurrentManagedThreadId + " is starving for connections.");
 				}
 			}
+
+			Thread.Sleep(TimeSpan.FromMilliseconds(rand.Next(100, 200)));
 		}
+	}
 
-		public void Dispose() {
-			if (isDisposed) {
-				return;
-			}
+	private void Return(PooledConnection conn) {
+		ThrowIfDisposed();
 
-			isDisposed = true;
-			
-			lock (monitor) {
-				while (free.TryTake(out var conn)) {
-					Close(conn.InnerConnection);
-				}
-
-				foreach (var conn in used) {
-					Close(conn.InnerConnection);
-				}
-
-				free.Dispose();
-				used.Clear();
-			}
-		}
-
-		private static void Close(SqliteConnection conn) {
-			conn.Close();
-			conn.Dispose();
-		}
-
-		private sealed class PooledConnection : ISqliteConnection {
-			public SqliteConnection InnerConnection { get; }
-
-			private readonly SqliteConnectionPool pool;
-
-			public PooledConnection(SqliteConnectionPool pool, SqliteConnection conn) {
-				this.pool = pool;
-				this.InnerConnection = conn;
-			}
-
-			void IDisposable.Dispose() {
-				pool.Return(this);
+		lock (monitor) {
+			if (used.Remove(conn)) {
+				free.Add(conn);
 			}
 		}
 	}
+
+	public void Dispose() {
+		if (isDisposed) {
+			return;
+		}
+
+		isDisposed = true;
+
+		lock (monitor) {
+			while (free.TryTake(out var conn)) {
+				Close(conn.InnerConnection);
+			}
+
+			foreach (var conn in used) {
+				Close(conn.InnerConnection);
+			}
+
+			free.Dispose();
+			used.Clear();
+		}
+	}
+
+	private static void Close(SqliteConnection conn) {
+		conn.Close();
+		conn.Dispose();
+	}
+
+	private sealed class PooledConnection : ISqliteConnection {
+		public SqliteConnection InnerConnection { get; }
+
+		private readonly SqliteConnectionPool pool;
+
+		public PooledConnection(SqliteConnectionPool pool, SqliteConnection conn) {
+			this.pool = pool;
+			this.InnerConnection = conn;
+		}
+
+		void IDisposable.Dispose() {
+			pool.Return(this);
+		}
+	}
 }

app/Server/Database/Sqlite/Utils/SqliteExtensions.cs

@@ -2,70 +2,70 @@ using System;
 using System.Linq;
 using Microsoft.Data.Sqlite;
 
-namespace DHT.Server.Database.Sqlite.Utils {
-	static class SqliteExtensions {
-		public static SqliteCommand Command(this ISqliteConnection conn, string sql) {
-			var cmd = conn.InnerConnection.CreateCommand();
-			cmd.CommandText = sql;
-			return cmd;
-		}
+namespace DHT.Server.Database.Sqlite.Utils;
 
-		public static SqliteTransaction BeginTransaction(this ISqliteConnection conn) {
-			return conn.InnerConnection.BeginTransaction();
-		}
+static class SqliteExtensions {
+	public static SqliteCommand Command(this ISqliteConnection conn, string sql) {
+		var cmd = conn.InnerConnection.CreateCommand();
+		cmd.CommandText = sql;
+		return cmd;
+	}
 
-		public static object? SelectScalar(this ISqliteConnection conn, string sql) {
-			using var cmd = conn.Command(sql);
-			return cmd.ExecuteScalar();
-		}
+	public static SqliteTransaction BeginTransaction(this ISqliteConnection conn) {
+		return conn.InnerConnection.BeginTransaction();
+	}
 
-		public static SqliteCommand Insert(this ISqliteConnection conn, string tableName, (string Name, SqliteType Type)[] columns) {
-			string columnNames = string.Join(',', columns.Select(static c => c.Name));
-			string columnParams = string.Join(',', columns.Select(static c => ':' + c.Name));
+	public static object? SelectScalar(this ISqliteConnection conn, string sql) {
+		using var cmd = conn.Command(sql);
+		return cmd.ExecuteScalar();
+	}
 
-			var cmd = conn.Command("INSERT INTO " + tableName + " (" + columnNames + ")" +
-			                       "VALUES (" + columnParams + ")");
+	public static SqliteCommand Insert(this ISqliteConnection conn, string tableName, (string Name, SqliteType Type)[] columns) {
+		string columnNames = string.Join(',', columns.Select(static c => c.Name));
+		string columnParams = string.Join(',', columns.Select(static c => ':' + c.Name));
 
-			CreateParameters(cmd, columns);
-			return cmd;
-		}
+		var cmd = conn.Command("INSERT INTO " + tableName + " (" + columnNames + ")" +
+		                       "VALUES (" + columnParams + ")");
 
-		public static SqliteCommand Upsert(this ISqliteConnection conn, string tableName, (string Name, SqliteType Type)[] columns) {
-			string columnNames = string.Join(',', columns.Select(static c => c.Name));
-			string columnParams = string.Join(',', columns.Select(static c => ':' + c.Name));
-			string columnUpdates = string.Join(',', columns.Skip(1).Select(static c => c.Name + " = excluded." + c.Name));
+		CreateParameters(cmd, columns);
+		return cmd;
+	}
 
-			var cmd = conn.Command("INSERT INTO " + tableName + " (" + columnNames + ")" +
-			                       "VALUES (" + columnParams + ")" +
-			                       "ON CONFLICT (" + columns[0].Name + ")" +
-			                       "DO UPDATE SET " + columnUpdates);
+	public static SqliteCommand Upsert(this ISqliteConnection conn, string tableName, (string Name, SqliteType Type)[] columns) {
+		string columnNames = string.Join(',', columns.Select(static c => c.Name));
+		string columnParams = string.Join(',', columns.Select(static c => ':' + c.Name));
+		string columnUpdates = string.Join(',', columns.Skip(1).Select(static c => c.Name + " = excluded." + c.Name));
 
-			CreateParameters(cmd, columns);
-			return cmd;
-		}
+		var cmd = conn.Command("INSERT INTO " + tableName + " (" + columnNames + ")" +
+		                       "VALUES (" + columnParams + ")" +
+		                       "ON CONFLICT (" + columns[0].Name + ")" +
+		                       "DO UPDATE SET " + columnUpdates);
 
-		public static SqliteCommand Delete(this ISqliteConnection conn, string tableName, (string Name, SqliteType Type) column) {
-			var cmd = conn.Command("DELETE FROM " + tableName + " WHERE " + column.Name + " = :" + column.Name);
-			CreateParameters(cmd, new [] { column });
-			return cmd;
-		}
+		CreateParameters(cmd, columns);
+		return cmd;
+	}
 
-		private static void CreateParameters(SqliteCommand cmd, (string Name, SqliteType Type)[] columns) {
-			foreach (var (name, type) in columns) {
-				cmd.Parameters.Add(":" + name, type);
-			}
-		}
+	public static SqliteCommand Delete(this ISqliteConnection conn, string tableName, (string Name, SqliteType Type) column) {
+		var cmd = conn.Command("DELETE FROM " + tableName + " WHERE " + column.Name + " = :" + column.Name);
+		CreateParameters(cmd, new [] { column });
+		return cmd;
+	}
 
-		public static void AddAndSet(this SqliteCommand cmd, string key, SqliteType type, object? value) {
-			cmd.Parameters.Add(key, type).Value = value ?? DBNull.Value;
-		}
-
-		public static void Set(this SqliteCommand cmd, string key, object? value) {
-			cmd.Parameters[key].Value = value ?? DBNull.Value;
-		}
-
-		public static ulong GetUint64(this SqliteDataReader reader, int ordinal) {
-			return (ulong) reader.GetInt64(ordinal);
+	private static void CreateParameters(SqliteCommand cmd, (string Name, SqliteType Type)[] columns) {
+		foreach (var (name, type) in columns) {
+			cmd.Parameters.Add(":" + name, type);
 		}
 	}
+
+	public static void AddAndSet(this SqliteCommand cmd, string key, SqliteType type, object? value) {
+		cmd.Parameters.Add(key, type).Value = value ?? DBNull.Value;
+	}
+
+	public static void Set(this SqliteCommand cmd, string key, object? value) {
+		cmd.Parameters[key].Value = value ?? DBNull.Value;
+	}
+
+	public static ulong GetUint64(this SqliteDataReader reader, int ordinal) {
+		return (ulong) reader.GetInt64(ordinal);
+	}
 }

app/Server/Database/Sqlite/Utils/SqliteWhereGenerator.cs

@@ -1,31 +1,31 @@
 using System.Collections.Generic;
 
-namespace DHT.Server.Database.Sqlite.Utils {
-	sealed class SqliteWhereGenerator {
-		private readonly string? tableAlias;
-		private readonly bool invert;
-		private readonly List<string> conditions = new ();
+namespace DHT.Server.Database.Sqlite.Utils;
 
-		public SqliteWhereGenerator(string? tableAlias, bool invert) {
-			this.tableAlias = tableAlias;
-			this.invert = invert;
+sealed class SqliteWhereGenerator {
+	private readonly string? tableAlias;
+	private readonly bool invert;
+	private readonly List<string> conditions = new ();
+
+	public SqliteWhereGenerator(string? tableAlias, bool invert) {
+		this.tableAlias = tableAlias;
+		this.invert = invert;
+	}
+
+	public void AddCondition(string condition) {
+		conditions.Add(tableAlias == null ? condition : tableAlias + '.' + condition);
+	}
+
+	public string Generate() {
+		if (conditions.Count == 0) {
+			return "";
 		}
 
-		public void AddCondition(string condition) {
-			conditions.Add(tableAlias == null ? condition : tableAlias + '.' + condition);
+		if (invert) {
+			return " WHERE NOT (" + string.Join(" AND ", conditions) + ")";
 		}
-
-		public string Generate() {
-			if (conditions.Count == 0) {
-				return "";
-			}
-
-			if (invert) {
-				return " WHERE NOT (" + string.Join(" AND ", conditions) + ")";
-			}
-			else {
-				return " WHERE " + string.Join(" AND ", conditions);
-			}
+		else {
+			return " WHERE " + string.Join(" AND ", conditions);
 		}
 	}
 }