WIP

app/Desktop/App.axaml.cs

@@ -1,4 +1,3 @@
-using System;
 using Avalonia;
 using Avalonia.Controls.ApplicationLifetimes;
 using Avalonia.Markup.Xaml;
@@ -13,7 +12,7 @@ sealed class App : Application {
 
 	public override void OnFrameworkInitializationCompleted() {
 		if (ApplicationLifetime is IClassicDesktopStyleApplicationLifetime desktop) {
-			desktop.MainWindow = new MainWindow(new Arguments(desktop.Args ?? Array.Empty<string>()));
+			desktop.MainWindow = new MainWindow(Program.Arguments);
 		}
 
 		base.OnFrameworkInitializationCompleted();

app/Desktop/Arguments.cs

@@ -6,25 +6,32 @@ namespace DHT.Desktop;
 sealed class Arguments {
 	private static readonly Log Log = Log.ForType<Arguments>();
 	
+	private const int FirstArgument = 1;
+
 	public static Arguments Empty => new(Array.Empty<string>());
 
+	public bool Console { get; }
 	public string? DatabaseFile { get; }
 	public ushort? ServerPort { get; }
 	public string? ServerToken { get; }
 
 	public Arguments(string[] args) {
-		for (int i = 0; i < args.Length; i++) {
+		for (int i = FirstArgument; i < args.Length; i++) {
 			string key = args[i];
 
 			switch (key) {
 				case "-debug":
 					Log.IsDebugEnabled = true;
 					continue;
+				
+				case "-console":
+					Console = true;
+					continue;
 			}
 
 			string value;
 
-			if (i == 0 && !key.StartsWith('-')) {
+			if (i == FirstArgument && !key.StartsWith('-')) {
 				value = key;
 				key = "-db";
 			}

app/Desktop/Common/DatabaseGui.cs

@@ -1,9 +1,11 @@
 using System;
 using System.Collections.Generic;
 using System.IO;
+using System.Threading;
 using System.Threading.Tasks;
 using Avalonia.Controls;
 using Avalonia.Platform.Storage;
+using Avalonia.Threading;
 using DHT.Desktop.Dialogs.File;
 using DHT.Desktop.Dialogs.Message;
 using DHT.Server.Database;
@@ -41,11 +43,16 @@ static class DatabaseGui {
 		});
 	}
 
-	public static async Task<IDatabaseFile?> TryOpenOrCreateDatabaseFromPath(string path, Window window, Func<Task<bool>> checkCanUpgradeDatabase) {
+	public static async Task<IDatabaseFile?> TryOpenOrCreateDatabaseFromPath(string path, Window window, ISchemaUpgradeCallbacks schemaUpgradeCallbacks) {
+		var prevSynchronizationContext = SynchronizationContext.Current;
+		SynchronizationContext.SetSynchronizationContext(new AvaloniaSynchronizationContext());
+		var taskScheduler = TaskScheduler.FromCurrentSynchronizationContext();
+		SynchronizationContext.SetSynchronizationContext(prevSynchronizationContext);
+		
 		IDatabaseFile? file = null;
 
 		try {
-			file = await SqliteDatabaseFile.OpenOrCreate(path, checkCanUpgradeDatabase);
+			file = await SqliteDatabaseFile.OpenOrCreate(path, schemaUpgradeCallbacks, taskScheduler);
 		} catch (InvalidDatabaseVersionException ex) {
 			await Dialog.ShowOk(window, "Database Error", "Database '" + Path.GetFileName(path) + "' appears to be corrupted (invalid version: " + ex.Version + ").");
 		} catch (DatabaseTooNewException ex) {

app/Desktop/Desktop.csproj

@@ -9,6 +9,7 @@
   <PropertyGroup>
     <OutputType>WinExe</OutputType>
     <ApplicationIcon>./Resources/icon.ico</ApplicationIcon>
+    <AvaloniaUseCompiledBindingsByDefault>true</AvaloniaUseCompiledBindingsByDefault>
     <CheckForOverflowUnderflow>true</CheckForOverflowUnderflow>
     <SatelliteResourceLanguages>en</SatelliteResourceLanguages>
   </PropertyGroup>

app/Desktop/Dialogs/CheckBox/CheckBoxDialog.axaml

@@ -5,6 +5,7 @@
         xmlns:namespace="clr-namespace:DHT.Desktop.Dialogs.CheckBox"
         mc:Ignorable="d" d:DesignWidth="500"
         x:Class="DHT.Desktop.Dialogs.CheckBox.CheckBoxDialog"
+        x:DataType="namespace:CheckBoxDialogModel"
         Title="{Binding Title}"
         Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
         Width="500" SizeToContent="Height" CanResize="False"

app/Desktop/Dialogs/Message/MessageDialog.axaml

@@ -5,6 +5,7 @@
         xmlns:namespace="clr-namespace:DHT.Desktop.Dialogs.Message"
         mc:Ignorable="d" d:DesignWidth="500"
         x:Class="DHT.Desktop.Dialogs.Message.MessageDialog"
+        x:DataType="namespace:MessageDialogModel"
         Title="{Binding Title}"
         Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
         Width="500" SizeToContent="Height" CanResize="False"

app/Desktop/Dialogs/Progress/IProgressCallback.cs

@@ -4,4 +4,5 @@ namespace DHT.Desktop.Dialogs.Progress;
 
 interface IProgressCallback {
 	Task Update(string message, int finishedItems, int totalItems);
+	Task Hide();
 }

app/Desktop/Dialogs/Progress/ProgressDialog.axaml

@@ -5,6 +5,7 @@
         xmlns:namespace="clr-namespace:DHT.Desktop.Dialogs.Progress"
         mc:Ignorable="d" d:DesignWidth="500"
         x:Class="DHT.Desktop.Dialogs.Progress.ProgressDialog"
+        x:DataType="namespace:ProgressDialogModel"
         Title="{Binding Title}"
         Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
         Opened="OnOpened"
@@ -31,12 +32,18 @@
         </Style>
     </Window.Styles>
 
-    <StackPanel Margin="20">
-        <DockPanel>
-            <TextBlock DockPanel.Dock="Right" Text="{Binding Items}" Classes="items" />
-            <TextBlock DockPanel.Dock="Left" Text="{Binding Message}" />
-        </DockPanel>
-        <ProgressBar Value="{Binding Progress}" />
-    </StackPanel>
+    <ItemsRepeater ItemsSource="{Binding Items}" Margin="0 10">
+        <ItemsRepeater.ItemTemplate>
+            <DataTemplate>
+                <StackPanel Margin="20 10" IsHitTestVisible="{Binding IsVisible}" Opacity="{Binding Opacity}">
+                    <DockPanel>
+                        <TextBlock DockPanel.Dock="Right" Text="{Binding Items}" Classes="items" />
+                        <TextBlock DockPanel.Dock="Left" Text="{Binding Message}" />
+                    </DockPanel>
+                    <ProgressBar Value="{Binding Progress}" />
+                </StackPanel>
+            </DataTemplate>
+        </ItemsRepeater.ItemTemplate>
+    </ItemsRepeater>
 
 </Window>

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

@@ -8,6 +8,7 @@ namespace DHT.Desktop.Dialogs.Progress;
 [SuppressMessage("ReSharper", "MemberCanBeInternal")]
 public sealed partial class ProgressDialog : Window {
 	private bool isFinished = false;
+	private Task progressTask = Task.CompletedTask;
 
 	public ProgressDialog() {
 		InitializeComponent();
@@ -15,7 +16,8 @@ public sealed partial class ProgressDialog : Window {
 
 	public void OnOpened(object? sender, EventArgs e) {
 		if (DataContext is ProgressDialogModel model) {
-			Task.Run(model.StartTask).ContinueWith(OnFinished, TaskScheduler.FromCurrentSynchronizationContext());
+			progressTask = Task.Run(model.StartTask);
+			progressTask.ContinueWith(OnFinished, TaskScheduler.FromCurrentSynchronizationContext());
 		}
 	}
 
@@ -27,4 +29,9 @@ public sealed partial class ProgressDialog : Window {
 		isFinished = true;
 		Close();
 	}
+
+	public async Task ShowProgressDialog(Window owner) {
+		await ShowDialog(owner);
+		await progressTask;
+	}
 }

app/Desktop/Dialogs/Progress/ProgressDialogModel.cs

@@ -1,4 +1,6 @@
 using System;
+using System.Collections.Generic;
+using System.Linq;
 using System.Threading.Tasks;
 using Avalonia.Threading;
 using DHT.Desktop.Common;
@@ -9,57 +11,43 @@ namespace DHT.Desktop.Dialogs.Progress;
 sealed class ProgressDialogModel : BaseModel {
 	public string Title { get; init; } = "";
 
-	private string message = "";
-
-	public string Message {
-		get => message;
-		private set => Change(ref message, value);
-	}
-
-	private string items = "";
-
-	public string Items {
-		get => items;
-		private set => Change(ref items, value);
-	}
-
-	private int progress = 0;
-
-	public int Progress {
-		get => progress;
-		private set => Change(ref progress, value);
-	}
+	public IReadOnlyList<ProgressItem> Items { get; } = Array.Empty<ProgressItem>();
 
 	private readonly TaskRunner? task;
 
 	[Obsolete("Designer")]
 	public ProgressDialogModel() {}
 
-	public ProgressDialogModel(TaskRunner task) {
+	public ProgressDialogModel(TaskRunner task, int progressItems = 1) {
+		this.Items = Enumerable.Range(0, progressItems).Select(static _ => new ProgressItem()).ToArray();
 		this.task = task;
 	}
 
 	internal async Task StartTask() {
 		if (task != null) {
-			await task(new Callback(this));
+			await task(Items.Select(static item => new Callback(item)).ToArray());
 		}
 	}
 
-	public delegate Task TaskRunner(IProgressCallback callback);
+	public delegate Task TaskRunner(IReadOnlyList<IProgressCallback> callbacks);
 
 	private sealed class Callback : IProgressCallback {
-		private readonly ProgressDialogModel model;
+		private readonly ProgressItem item;
 
-		public Callback(ProgressDialogModel model) {
-			this.model = model;
+		public Callback(ProgressItem item) {
+			this.item = item;
 		}
 
-		async Task IProgressCallback.Update(string message, int finishedItems, int totalItems) {
+		public async Task 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;
+				item.Message = message;
+				item.Items = totalItems == 0 ? string.Empty : finishedItems.Format() + " / " + totalItems.Format();
+				item.Progress = totalItems == 0 ? 0 : 100 * finishedItems / totalItems;
 			});
 		}
+
+		public Task Hide() {
+			return Update(string.Empty, 0, 0);
+		}
 	}
 }

app/Desktop/Dialogs/Progress/ProgressItem.cs

@@ -0,0 +1,41 @@
+using DHT.Utils.Models;
+
+namespace DHT.Desktop.Dialogs.Progress; 
+
+sealed class ProgressItem : BaseModel {
+	private bool isVisible = false;
+
+	public bool IsVisible {
+		get => isVisible;
+		private set {
+			Change(ref isVisible, value);
+			OnPropertyChanged(nameof(Opacity));
+		}
+	}
+	
+	public double Opacity => IsVisible ? 1.0 : 0.0;
+
+	private string message = "";
+
+	public string Message {
+		get => message;
+		set {
+			Change(ref message, value);
+			IsVisible = !string.IsNullOrEmpty(value);
+		}
+	}
+
+	private string items = "";
+
+	public string Items {
+		get => items;
+		set => Change(ref items, value);
+	}
+
+	private int progress = 0;
+
+	public int Progress {
+		get => progress;
+		set => Change(ref progress, value);
+	}
+}

app/Desktop/Dialogs/TextBox/TextBoxDialog.axaml

@@ -5,6 +5,7 @@
         xmlns:namespace="clr-namespace:DHT.Desktop.Dialogs.TextBox"
         mc:Ignorable="d" d:DesignWidth="500"
         x:Class="DHT.Desktop.Dialogs.TextBox.TextBoxDialog"
+        x:DataType="namespace:TextBoxDialogModel"
         Title="{Binding Title}"
         Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
         Width="500" SizeToContent="Height" CanResize="False"

app/Desktop/Discord/DiscordAppSettings.cs

@@ -1,9 +1,9 @@
 using System;
-using System.Collections.Generic;
 using System.Diagnostics.CodeAnalysis;
 using System.IO;
 using System.Runtime.InteropServices;
 using System.Text.Json;
+using System.Text.Json.Nodes;
 using System.Threading.Tasks;
 using DHT.Utils.Logging;
 using static System.Environment.SpecialFolder;
@@ -47,12 +47,12 @@ static class DiscordAppSettings {
 		}
 	}
 
-	private static bool AreDevToolsEnabled(Dictionary<string, object?> json) {
-		return json.TryGetValue(JsonKeyDevTools, out var value) && value is JsonElement { ValueKind: JsonValueKind.True };
+	private static bool AreDevToolsEnabled(JsonObject json) {
+		return json.TryGetPropertyValue(JsonKeyDevTools, out var node) && node?.GetValueKind() == JsonValueKind.True;
 	}
 
 	public static async Task<SettingsJsonResult> ConfigureDevTools(bool enable) {
-		Dictionary<string, object?> json;
+		JsonObject json;
 
 		try {
 			json = await ReadSettingsJson();
@@ -109,13 +109,13 @@ static class DiscordAppSettings {
 		return SettingsJsonResult.Success;
 	}
 
-	private static async Task<Dictionary<string, object?>> ReadSettingsJson() {
+	private static async Task<JsonObject> ReadSettingsJson() {
 		await using var stream = new FileStream(JsonFilePath, FileMode.Open, FileAccess.Read, FileShare.Read);
-		return await JsonSerializer.DeserializeAsync<Dictionary<string, object?>?>(stream) ?? throw new JsonException();
+		return await JsonSerializer.DeserializeAsync(stream, DiscordAppSettingsJsonContext.Default.JsonObject) ?? throw new JsonException();
 	}
 
-	private static async Task WriteSettingsJson(Dictionary<string, object?> json) {
+	private static async Task WriteSettingsJson(JsonObject json) {
 		await using var stream = new FileStream(JsonFilePath, FileMode.Truncate, FileAccess.Write, FileShare.None);
-		await JsonSerializer.SerializeAsync(stream, json, new JsonSerializerOptions { WriteIndented = true });
+		await JsonSerializer.SerializeAsync(stream, json, DiscordAppSettingsJsonContext.Default.JsonObject);
 	}
 }

app/Desktop/Discord/DiscordAppSettingsJsonContext.cs

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

app/Desktop/Main/AboutWindow.axaml

@@ -5,6 +5,7 @@
         xmlns:main="clr-namespace:DHT.Desktop.Main"
         mc:Ignorable="d" d:DesignWidth="480" d:DesignHeight="295"
         x:Class="DHT.Desktop.Main.AboutWindow"
+        x:DataType="main:AboutWindowModel"
         Title="About Discord History Tracker"
         Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
         Width="480" Height="295" CanResize="False"

app/Desktop/Main/Controls/AttachmentFilterPanel.axaml

@@ -4,7 +4,8 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
              mc:Ignorable="d"
-             x:Class="DHT.Desktop.Main.Controls.AttachmentFilterPanel">
+             x:Class="DHT.Desktop.Main.Controls.AttachmentFilterPanel"
+             x:DataType="controls:AttachmentFilterPanelModel">
 
     <Design.DataContext>
         <controls:AttachmentFilterPanelModel />

app/Desktop/Main/Controls/MessageFilterPanel.axaml

@@ -4,7 +4,8 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
              mc:Ignorable="d"
-             x:Class="DHT.Desktop.Main.Controls.MessageFilterPanel">
+             x:Class="DHT.Desktop.Main.Controls.MessageFilterPanel"
+             x:DataType="controls:MessageFilterPanelModel">
 
     <Design.DataContext>
         <controls:MessageFilterPanelModel />

app/Desktop/Main/Controls/ServerConfigurationPanel.axaml

@@ -4,7 +4,8 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
              mc:Ignorable="d"
-             x:Class="DHT.Desktop.Main.Controls.ServerConfigurationPanel">
+             x:Class="DHT.Desktop.Main.Controls.ServerConfigurationPanel"
+             x:DataType="controls:ServerConfigurationPanelModel">
 
     <Design.DataContext>
         <controls:ServerConfigurationPanelModel />

app/Desktop/Main/Controls/StatusBar.axaml

@@ -4,7 +4,8 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
              mc:Ignorable="d"
-             x:Class="DHT.Desktop.Main.Controls.StatusBar">
+             x:Class="DHT.Desktop.Main.Controls.StatusBar"
+             x:DataType="controls:StatusBarModel">
 
     <Design.DataContext>
         <controls:StatusBarModel />

app/Desktop/Main/MainWindow.axaml

@@ -5,6 +5,7 @@
         xmlns:main="clr-namespace:DHT.Desktop.Main"
         mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
         x:Class="DHT.Desktop.Main.MainWindow"
+        x:DataType="main:MainWindowModel"
         Title="{Binding Title}"
         Icon="avares://DiscordHistoryTracker/Resources/icon.ico"
         Width="800" Height="500"

app/Desktop/Main/Pages/AdvancedPage.axaml

@@ -5,7 +5,8 @@
              xmlns:pages="clr-namespace:DHT.Desktop.Main.Pages"
              xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="DHT.Desktop.Main.Pages.AdvancedPage">
+             x:Class="DHT.Desktop.Main.Pages.AdvancedPage"
+             x:DataType="pages:AdvancedPageModel">
 
     <Design.DataContext>
         <pages:AdvancedPageModel />

app/Desktop/Main/Pages/AttachmentsPage.axaml

@@ -5,7 +5,8 @@
              xmlns:pages="clr-namespace:DHT.Desktop.Main.Pages"
              xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="DHT.Desktop.Main.Pages.AttachmentsPage">
+             x:Class="DHT.Desktop.Main.Pages.AttachmentsPage"
+             x:DataType="pages:AttachmentsPageModel">
 
     <Design.DataContext>
         <pages:AttachmentsPageModel />
@@ -35,7 +36,7 @@
             <TextBlock Text="{Binding DownloadMessage}" Margin="10 0 0 0" VerticalAlignment="Center" DockPanel.Dock="Left" />
             <ProgressBar Value="{Binding DownloadProgress}" IsVisible="{Binding IsDownloading}" Margin="15 0" VerticalAlignment="Center" DockPanel.Dock="Right" />
         </DockPanel>
-        <controls:AttachmentFilterPanel DataContext="{Binding FilterModel}" IsEnabled="{Binding !DataContext.IsDownloading, RelativeSource={RelativeSource AncestorType=UserControl}}" />
+        <controls:AttachmentFilterPanel DataContext="{Binding FilterModel}" IsEnabled="{Binding !IsDownloading, RelativeSource={RelativeSource AncestorType=pages:AttachmentsPageModel}}" />
         <StackPanel Orientation="Vertical" Spacing="12">
             <Expander Header="Download Status" IsExpanded="True">
                 <DataGrid ItemsSource="{Binding StatisticsRows}" AutoGenerateColumns="False" CanUserReorderColumns="False" CanUserResizeColumns="False" CanUserSortColumns="False" IsReadOnly="True">

app/Desktop/Main/Pages/DatabasePage.axaml

@@ -4,7 +4,8 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:pages="clr-namespace:DHT.Desktop.Main.Pages"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="DHT.Desktop.Main.Pages.DatabasePage">
+             x:Class="DHT.Desktop.Main.Pages.DatabasePage"
+             x:DataType="pages:DatabasePageModel">
 
     <Design.DataContext>
         <pages:DatabasePageModel />

app/Desktop/Main/Pages/DatabasePageModel.cs

@@ -17,6 +17,7 @@ using DHT.Desktop.Dialogs.TextBox;
 using DHT.Server.Data;
 using DHT.Server.Database;
 using DHT.Server.Database.Import;
+using DHT.Server.Database.Sqlite;
 using DHT.Utils.Logging;
 using DHT.Utils.Models;
 
@@ -77,31 +78,18 @@ sealed class DatabasePageModel : BaseModel {
 		}
 
 		ProgressDialog progressDialog = new ProgressDialog();
-		progressDialog.DataContext = new ProgressDialogModel(async callback => await MergeWithDatabaseFromPaths(Db, paths, progressDialog, callback)) {
+		progressDialog.DataContext = new ProgressDialogModel(async callbacks => await MergeWithDatabaseFromPaths(Db, paths, progressDialog, callbacks[0])) {
 			Title = "Database Merge"
 		};
 
-		await progressDialog.ShowDialog(window);
+		await progressDialog.ShowProgressDialog(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;
-		}
+		var schemaUpgradeCallbacks = new SchemaUpgradeCallbacks(dialog, paths.Length);
 		
 		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);
+			IDatabaseFile? db = await DatabaseGui.TryOpenOrCreateDatabaseFromPath(path, dialog, schemaUpgradeCallbacks);
 
 			if (db == null) {
 				return false;
@@ -116,6 +104,41 @@ sealed class DatabasePageModel : BaseModel {
 		});
 	}
 
+	private sealed class SchemaUpgradeCallbacks : ISchemaUpgradeCallbacks {
+		private readonly ProgressDialog dialog;
+		private readonly int total;
+		private bool? decision;
+		
+		public SchemaUpgradeCallbacks(ProgressDialog dialog, int total) {
+			this.total = total;
+			this.dialog = dialog;
+		}
+
+		public async Task<bool> CanUpgrade() {
+			return decision ??= (total > 1
+				                     ? await DatabaseGui.ShowCanUpgradeMultipleDatabaseDialog(dialog)
+				                     : await DatabaseGui.ShowCanUpgradeDatabaseDialog(dialog)) == DialogResult.YesNo.Yes;
+		}
+
+		public Task Start(int versionSteps, Func<ISchemaUpgradeCallbacks.IProgressReporter, Task> doUpgrade) {
+			return doUpgrade(new NullReporter());
+		}
+
+		private sealed class NullReporter : ISchemaUpgradeCallbacks.IProgressReporter {
+			public Task NextVersion() {
+				return Task.CompletedTask;
+			}
+
+			public Task MainWork(string message, int finishedItems, int totalItems) {
+				return Task.CompletedTask;
+			}
+
+			public Task SubWork(string message, int finishedItems, int totalItems) {
+				return Task.CompletedTask;
+			}
+		}
+	}
+
 	public async void ImportLegacyArchive() {
 		var paths = await window.StorageProvider.OpenFiles(new FilePickerOpenOptions {
 			Title = "Open Legacy DHT Archive",
@@ -128,11 +151,11 @@ sealed class DatabasePageModel : BaseModel {
 		}
 
 		ProgressDialog progressDialog = new ProgressDialog();
-		progressDialog.DataContext = new ProgressDialogModel(async callback => await ImportLegacyArchiveFromPaths(Db, paths, progressDialog, callback)) {
+		progressDialog.DataContext = new ProgressDialogModel(async callbacks => await ImportLegacyArchiveFromPaths(Db, paths, progressDialog, callbacks[0])) {
 			Title = "Legacy Archive Import"
 		};
 
-		await progressDialog.ShowDialog(window);
+		await progressDialog.ShowProgressDialog(window);
 	}
 
 	private static async Task ImportLegacyArchiveFromPaths(IDatabaseFile target, string[] paths, ProgressDialog dialog, IProgressCallback callback) {

app/Desktop/Main/Pages/DebugPage.axaml

@@ -4,7 +4,8 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:pages="clr-namespace:DHT.Desktop.Main.Pages"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="DHT.Desktop.Main.Pages.DebugPage">
+             x:Class="DHT.Desktop.Main.Pages.DebugPage"
+             x:DataType="pages:DebugPageModel">
     
     <Design.DataContext>
         <pages:DebugPageModel />

app/Desktop/Main/Pages/DebugPageModel.cs

@@ -45,12 +45,12 @@ namespace DHT.Desktop.Main.Pages {
 			}
 
 			ProgressDialog progressDialog = new ProgressDialog {
-				DataContext = new ProgressDialogModel(async callback => await GenerateRandomData(channels, users, messages, callback)) {
+				DataContext = new ProgressDialogModel(async callbacks => await GenerateRandomData(channels, users, messages, callbacks[0])) {
 					Title = "Generating Random Data"
 				}
 			};
 
-			await progressDialog.ShowDialog(window);
+			await progressDialog.ShowProgressDialog(window);
 		}
 
 		private const int BatchSize = 500;

app/Desktop/Main/Pages/TrackingPage.axaml

@@ -4,7 +4,8 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:pages="clr-namespace:DHT.Desktop.Main.Pages"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="DHT.Desktop.Main.Pages.TrackingPage">
+             x:Class="DHT.Desktop.Main.Pages.TrackingPage"
+             x:DataType="pages:TrackingPageModel">
 
     <Design.DataContext>
         <pages:TrackingPageModel />

app/Desktop/Main/Pages/ViewerPage.axaml

@@ -5,7 +5,8 @@
              xmlns:pages="clr-namespace:DHT.Desktop.Main.Pages"
              xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="DHT.Desktop.Main.Pages.ViewerPage">
+             x:Class="DHT.Desktop.Main.Pages.ViewerPage"
+             x:DataType="pages:ViewerPageModel">
 
     <Design.DataContext>
         <pages:ViewerPageModel />

app/Desktop/Main/Pages/ViewerPageModel.cs

@@ -35,7 +35,7 @@ sealed class ViewerPageModel : BaseModel, IDisposable {
 		set => Change(ref hasFilters, value);
 	}
 
-	private MessageFilterPanelModel FilterModel { get; }
+	public MessageFilterPanelModel FilterModel { get; }
 
 	private readonly Window window;
 	private readonly IDatabaseFile db;
@@ -66,6 +66,8 @@ sealed class ViewerPageModel : BaseModel, IDisposable {
 		string viewerTemplate = indexFile.Replace("/*[JS]*/", await Resources.ReadJoinedAsync("Viewer/scripts/", '\n'))
 		                                 .Replace("/*[CSS]*/", await Resources.ReadJoinedAsync("Viewer/styles/", '\n'));
 		
+		viewerTemplate = strategy.ProcessViewerTemplate(viewerTemplate);
+
 		int viewerArchiveTagStart = viewerTemplate.IndexOf(ArchiveTag);
 		int viewerArchiveTagEnd = viewerArchiveTagStart + ArchiveTag.Length;
 

app/Desktop/Main/Screens/MainContentScreen.axaml

@@ -5,7 +5,8 @@
              xmlns:controls="clr-namespace:DHT.Desktop.Main.Controls"
              xmlns:screens="clr-namespace:DHT.Desktop.Main.Screens"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="DHT.Desktop.Main.Screens.MainContentScreen">
+             x:Class="DHT.Desktop.Main.Screens.MainContentScreen"
+             x:DataType="screens:MainContentScreenModel">
 
     <Design.DataContext>
         <screens:MainContentScreenModel />

app/Desktop/Main/Screens/WelcomeScreen.axaml

@@ -4,7 +4,8 @@
              xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
              xmlns:screens="clr-namespace:DHT.Desktop.Main.Screens"
              mc:Ignorable="d" d:DesignWidth="800" d:DesignHeight="450"
-             x:Class="DHT.Desktop.Main.Screens.WelcomeScreen">
+             x:Class="DHT.Desktop.Main.Screens.WelcomeScreen"
+             x:DataType="screens:WelcomeScreenModel">
 
     <Design.DataContext>
         <screens:WelcomeScreenModel />

app/Desktop/Main/Screens/WelcomeScreenModel.cs

@@ -1,10 +1,13 @@
 using System;
+using System.Collections.Generic;
 using System.IO;
 using System.Threading.Tasks;
 using Avalonia.Controls;
 using DHT.Desktop.Common;
 using DHT.Desktop.Dialogs.Message;
+using DHT.Desktop.Dialogs.Progress;
 using DHT.Server.Database;
+using DHT.Server.Database.Sqlite;
 using DHT.Utils.Models;
 
 namespace DHT.Desktop.Main.Screens;
@@ -39,14 +42,71 @@ sealed class WelcomeScreenModel : BaseModel, IDisposable {
 		}
 
 		dbFilePath = path;
-		Db = await DatabaseGui.TryOpenOrCreateDatabaseFromPath(path, window, CheckCanUpgradeDatabase);
+		Db = await DatabaseGui.TryOpenOrCreateDatabaseFromPath(path, window, new SchemaUpgradeCallbacks(window));
 
 		OnPropertyChanged(nameof(Db));
 		OnPropertyChanged(nameof(HasDatabase));
 	}
 
-	private async Task<bool> CheckCanUpgradeDatabase() {
-		return DialogResult.YesNo.Yes == await DatabaseGui.ShowCanUpgradeDatabaseDialog(window);
+	private sealed class SchemaUpgradeCallbacks : ISchemaUpgradeCallbacks {
+		private readonly Window window;
+		
+		public SchemaUpgradeCallbacks(Window window) {
+			this.window = window;
+		}
+
+		public async Task<bool> CanUpgrade() {
+			return DialogResult.YesNo.Yes == await DatabaseGui.ShowCanUpgradeDatabaseDialog(window);
+		}
+
+		public async Task Start(int versionSteps, Func<ISchemaUpgradeCallbacks.IProgressReporter, Task> doUpgrade) {
+			async Task StartUpgrade(IReadOnlyList<IProgressCallback> callbacks) {
+				var reporter = new ProgressReporter(versionSteps, callbacks);
+				await reporter.NextVersion();
+				await Task.Delay(TimeSpan.FromMilliseconds(800));
+				await doUpgrade(reporter);
+				await Task.Delay(TimeSpan.FromMilliseconds(600));
+			}
+
+			await new ProgressDialog {
+				DataContext = new ProgressDialogModel(StartUpgrade, progressItems: 3) {
+					Title = "Upgrading Database"
+				}
+			}.ShowProgressDialog(window);
+		}
+
+		private sealed class ProgressReporter : ISchemaUpgradeCallbacks.IProgressReporter {
+			private readonly IReadOnlyList<IProgressCallback> callbacks;
+			
+			private readonly int versionSteps;
+			private int versionProgress = 0;
+			
+			public ProgressReporter(int versionSteps, IReadOnlyList<IProgressCallback> callbacks) {
+				this.callbacks = callbacks;
+				this.versionSteps = versionSteps;
+			}
+
+			public async Task NextVersion() {
+				await callbacks[0].Update("Upgrading schema version...", versionProgress++, versionSteps);
+				await HideChildren(0);
+			}
+
+			public async Task MainWork(string message, int finishedItems, int totalItems) {
+				await callbacks[1].Update(message, finishedItems, totalItems);
+				await HideChildren(1);
+			}
+
+			public async Task SubWork(string message, int finishedItems, int totalItems) {
+				await callbacks[2].Update(message, finishedItems, totalItems);
+				await HideChildren(2);
+			}
+
+			private async Task HideChildren(int parentIndex) {
+				for (int i = parentIndex + 1; i < callbacks.Count; i++) {
+					await callbacks[i].Hide();
+				}
+			}
+		}
 	}
 
 	public void CloseDatabase() {

app/Desktop/Program.cs

@@ -1,6 +1,8 @@
-using System.Globalization;
+using System;
+using System.Globalization;
 using System.Reflection;
 using Avalonia;
+using DHT.Utils.Logging;
 using DHT.Utils.Resources;
 
 namespace DHT.Desktop;
@@ -9,6 +11,7 @@ static class Program {
 	public static string Version { get; }
 	public static CultureInfo Culture { get; }
 	public static ResourceLoader Resources { get; }
+	public static Arguments Arguments { get; }
 
 	static Program() {
 		var assembly = Assembly.GetExecutingAssembly();
@@ -25,10 +28,21 @@ static class Program {
 		CultureInfo.DefaultThreadCurrentUICulture = CultureInfo.InvariantCulture;
 
 		Resources = new ResourceLoader(assembly);
+		Arguments = new Arguments(Environment.GetCommandLineArgs());
 	}
 
 	public static void Main(string[] args) {
-		BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
+		if (Arguments.Console && OperatingSystem.IsWindows()) {
+			WindowsConsole.AllocConsole();
+		}
+
+		try {
+			BuildAvaloniaApp().StartWithClassicDesktopLifetime(args);
+		} finally {
+			if (Arguments.Console && OperatingSystem.IsWindows()) {
+				WindowsConsole.FreeConsole();
+			}
+		}
 	}
 
 	private static AppBuilder BuildAvaloniaApp() {

app/Directory.Build.props

@@ -19,9 +19,21 @@
   </PropertyGroup>
   
   <PropertyGroup>
+    <SuppressTrimAnalysisWarnings>false</SuppressTrimAnalysisWarnings>
     <PublishTrimmed>true</PublishTrimmed>
     <TrimMode>partial</TrimMode>
-    <JsonSerializerIsReflectionEnabledByDefault>true</JsonSerializerIsReflectionEnabledByDefault>
+    <EnableUnsafeBinaryFormatterSerialization>false</EnableUnsafeBinaryFormatterSerialization>
+    <EnableUnsafeUTF7Encoding>false</EnableUnsafeUTF7Encoding>
+    <EventSourceSupport>false</EventSourceSupport>
+    <HttpActivityPropagationSupport>false</HttpActivityPropagationSupport>
+    <JsonSerializerIsReflectionEnabledByDefault>false</JsonSerializerIsReflectionEnabledByDefault>
+  </PropertyGroup>
+  
+  <PropertyGroup>
+    <PublishSingleFile>true</PublishSingleFile>
+    <PublishReadyToRun>false</PublishReadyToRun>
+    <EnableCompressionInSingleFile>true</EnableCompressionInSingleFile>
+    <IncludeNativeLibrariesForSelfExtract>true</IncludeNativeLibrariesForSelfExtract>
   </PropertyGroup>
   
   <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">

app/Resources/Viewer/index.html

@@ -6,6 +6,8 @@
     
     <script type="text/javascript">
 		window.DHT_EMBEDDED = "/*[ARCHIVE]*/";
+		window.DHT_SERVER_URL = "/*[SERVER_URL]*/";
+    window.DHT_SERVER_TOKEN = "/*[SERVER_TOKEN]*/";
 		/*[JS]*/
     </script>
     <style>

app/Resources/Viewer/scripts/state.js

@@ -182,15 +182,32 @@ const STATE = (function() {
 		return null;
 	};
 	
-	const getMessageList = function() {
+	const getMessageList = async function(abortSignal) {
 		if (!loadedMessages) {
 			return [];
 		}
 		
 		const messages = getMessages(selectedChannel);
 		const startIndex = messagesPerPage * (root.getCurrentPage() - 1);
+		const slicedMessages = loadedMessages.slice(startIndex, !messagesPerPage ? undefined : startIndex + messagesPerPage);
 		
-		return loadedMessages.slice(startIndex, !messagesPerPage ? undefined : startIndex + messagesPerPage).map(key => {
+		let messageTexts = null;
+		
+		if (window.DHT_SERVER_URL !== null) {
+			const messageIds = new Set(slicedMessages);
+			
+			for (const key of slicedMessages) {
+				const message = messages[key];
+				
+				if ("r" in message) {
+					messageIds.add(message.r);
+				}
+			}
+			
+			messageTexts = await getMessageTextsFromServer(messageIds, abortSignal);
+		}
+		
+		return slicedMessages.map(key => {
 			/**
 			 * @type {{}}
 			 * @property {Number} u
@@ -216,6 +233,9 @@ const STATE = (function() {
 			if ("m" in message) {
 				obj["contents"] = message.m;
 			}
+			else if (messageTexts && key in messageTexts) {
+				obj["contents"] = messageTexts[key];
+			}
 			
 			if ("e" in message) {
 				obj["embeds"] = message.e.map(embed => JSON.parse(embed));
@@ -230,15 +250,16 @@ const STATE = (function() {
 			}
 			
 			if ("r" in message) {
-				const replyMessage = getMessageById(message.r);
+				const replyId = message.r;
+				const replyMessage = getMessageById(replyId);
 				const replyUser = replyMessage ? getUser(replyMessage.u) : null;
 				const replyAvatar = replyUser && replyUser.avatar ? { id: getUserId(replyMessage.u), path: replyUser.avatar } : null;
 				
 				obj["reply"] = replyMessage ? {
-					"id": message.r,
+					"id": replyId,
 					"user": replyUser,
 					"avatar": replyAvatar,
-					"contents": replyMessage.m
+					"contents": messageTexts != null && replyId in messageTexts ? messageTexts[replyId] : replyMessage.m,
 				} : null;
 			}
 			
@@ -250,9 +271,35 @@ const STATE = (function() {
 		});
 	};
 	
+	const getMessageTextsFromServer = async function(messageIds, abortSignal) {
+		let idParams = "";
+		
+		for (const messageId of messageIds) {
+			idParams += "id=" + encodeURIComponent(messageId) + "&";
+		}
+		
+		const response = await fetch(DHT_SERVER_URL + "/get-messages?" + idParams + "token=" + encodeURIComponent(DHT_SERVER_TOKEN), {
+			method: "GET",
+			headers: {
+				"Content-Type": "application/json",
+			},
+			credentials: "omit",
+			redirect: "error",
+			signal: abortSignal
+		});
+		
+		if (response.status === 200) {
+			return response.json();
+		}
+		else {
+			throw new Error("Server returned status " + response.status + " " + response.statusText);
+		}
+	};
+	
 	let eventOnUsersRefreshed;
 	let eventOnChannelsRefreshed;
 	let eventOnMessagesRefreshed;
+	let messageLoaderAborter = null;
 	
 	const triggerUsersRefreshed = function() {
 		eventOnUsersRefreshed && eventOnUsersRefreshed(getUserList());
@@ -263,7 +310,22 @@ const STATE = (function() {
 	};
 	
 	const triggerMessagesRefreshed = function() {
-		eventOnMessagesRefreshed && eventOnMessagesRefreshed(getMessageList());
+		if (!eventOnMessagesRefreshed) {
+			return;
+		}
+		
+		if (messageLoaderAborter != null) {
+			messageLoaderAborter.abort();
+		}
+		
+		const aborter = new AbortController();
+		messageLoaderAborter = aborter;
+		
+		getMessageList(aborter.signal).then(eventOnMessagesRefreshed).finally(() => {
+			if (messageLoaderAborter === aborter) {
+				messageLoaderAborter = null;
+			}
+		});
 	};
 	
 	const getFilteredMessageKeys = function(channel) {

app/Server/Database/DummyDatabaseFile.cs

@@ -44,7 +44,7 @@ public sealed class DummyDatabaseFile : IDatabaseFile {
 		return 0;
 	}
 
-	public List<Message> GetMessages(MessageFilter? filter = null) {
+	public List<Message> GetMessages(MessageFilter? filter = null, bool includeText = true) {
 		return new();
 	}
 

app/Server/Database/Export/Snowflake.cs

@@ -0,0 +1,3 @@
+namespace DHT.Server.Database.Export; 
+
+readonly record struct Snowflake(ulong Id);

app/Server/Database/Export/SnowflakeJsonSerializer.cs

@@ -0,0 +1,23 @@
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace DHT.Server.Database.Export;
+
+sealed class SnowflakeJsonSerializer : JsonConverter<Snowflake> {
+	public override Snowflake Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) {
+		return new Snowflake(ulong.Parse(reader.GetString()!));
+	}
+
+	public override void Write(Utf8JsonWriter writer, Snowflake value, JsonSerializerOptions options) {
+		writer.WriteStringValue(value.Id.ToString());
+	}
+
+	public override Snowflake ReadAsPropertyName(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options) {
+		return new Snowflake(ulong.Parse(reader.GetString()!));
+	}
+
+	public override void WriteAsPropertyName(Utf8JsonWriter writer, Snowflake value, JsonSerializerOptions options) {
+		writer.WritePropertyName(value.Id.ToString());
+	}
+}

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

@@ -3,5 +3,7 @@ using DHT.Server.Data;
 namespace DHT.Server.Database.Export.Strategy;
 
 public interface IViewerExportStrategy {
+	bool IncludeMessageText { get; }
+	string ProcessViewerTemplate(string template);
 	string GetAttachmentUrl(Attachment attachment);
 }

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

@@ -12,6 +12,13 @@ public sealed class LiveViewerExportStrategy : IViewerExportStrategy {
 		this.safeToken = WebUtility.UrlEncode(token);
 	}
 
+	public bool IncludeMessageText => false;
+
+	public string ProcessViewerTemplate(string template) {
+		return template.Replace("/*[SERVER_URL]*/", "http://127.0.0.1:" + safePort)
+		               .Replace("/*[SERVER_TOKEN]*/", WebUtility.UrlEncode(safeToken));
+	}
+
 	public string GetAttachmentUrl(Attachment attachment) {
 		return "http://127.0.0.1:" + safePort + "/get-attachment/" + WebUtility.UrlEncode(attachment.NormalizedUrl) + "?token=" + safeToken;
 	}

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

@@ -7,6 +7,13 @@ public sealed class StandaloneViewerExportStrategy : IViewerExportStrategy {
 
 	private StandaloneViewerExportStrategy() {}
 
+	public bool IncludeMessageText => true;
+
+	public string ProcessViewerTemplate(string template) {
+		return template.Replace("\"/*[SERVER_URL]*/\"", "null")
+		               .Replace("\"/*[SERVER_TOKEN]*/\"", "null");
+	}
+
 	public string GetAttachmentUrl(Attachment attachment) {
 		// The normalized URL will not load files from Discord CDN once the time limit is enforced.
 		

app/Server/Database/Export/ViewerJson.cs

@@ -0,0 +1,93 @@
+using System.Collections.Generic;
+using System.Text.Json.Serialization;
+
+namespace DHT.Server.Database.Export;
+
+sealed class ViewerJson {
+	public required JsonMeta Meta { get; init; }
+	public required Dictionary<Snowflake, Dictionary<Snowflake, JsonMessage>> Data { get; init; }
+
+	public sealed class JsonMeta {
+		public required Dictionary<Snowflake, JsonUser> Users { get; init; }
+		public required List<Snowflake> Userindex { get; init; }
+		public required List<JsonServer> Servers { get; init; }
+		public required Dictionary<Snowflake, JsonChannel> Channels { get; init; }
+	}
+	
+	public sealed class JsonUser {
+		public required string Name { get; init; }
+		
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public string? Avatar { get; init; }
+		
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public string? Tag { get; init; }
+	}
+
+	public sealed class JsonServer {
+		public required string Name { get; init; }
+		public required string Type { get; init; }
+	}
+
+	public sealed class JsonChannel {
+		public required int Server { get; init; }
+		public required string Name { get; init; }
+		
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public string? Parent { get; init; }
+		
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public int? Position { get; init; }
+		
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public string? Topic { get; init; }
+		
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public bool? Nsfw { get; init; }
+	}
+
+	public sealed class JsonMessage {
+		public required int U { get; init; }
+		public required long T { get; init; }
+
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public string? M { get; init; }
+
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public long? Te { get; init; }
+
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public string? R { get; init; }
+
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public JsonMessageAttachment[]? A { get; init; }
+		
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public string[]? E { get; init; }
+		
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public JsonMessageReaction[]? Re { get; init; }
+	}
+
+	public sealed class JsonMessageAttachment {
+		public required string Url { get; init; }
+		public required string Name { get; init; }
+		
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public int? Width { get; set; }
+		
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public int? Height { get; set; }
+	}
+
+	public sealed class JsonMessageReaction {
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public string? Id { get; init; }
+		
+		[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+		public string? N { get; init; }
+
+		public required bool A { get; init; }
+		public required int C { get; init; }
+	}
+}

app/Server/Database/Export/ViewerJsonContext.cs

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

app/Server/Database/Export/ViewerJsonExport.cs

@@ -21,7 +21,7 @@ public static class ViewerJsonExport {
 		var includedChannelIds = new HashSet<ulong>();
 		var includedServerIds = new HashSet<ulong>();
 
-		var includedMessages = db.GetMessages(filter);
+		var includedMessages = db.GetMessages(filter, strategy.IncludeMessageText);
 		var includedChannels = new List<Channel>();
 
 		foreach (var message in includedMessages) {
@@ -42,26 +42,28 @@ public static class ViewerJsonExport {
 
 		perf.Step("Collect database data");
 
-		var value = new {
-			meta = new { users, userindex, servers, channels },
-			data = GenerateMessageList(includedMessages, userIndices, strategy),
+		var value = new ViewerJson {
+			Meta = new ViewerJson.JsonMeta {
+				Users = users,
+				Userindex = userindex,
+				Servers = servers,
+				Channels = channels
+			},
+			Data = GenerateMessageList(includedMessages, userIndices, strategy)
 		};
 
 		perf.Step("Generate value object");
 
-		var opts = new JsonSerializerOptions();
-		opts.Converters.Add(new ViewerJsonSnowflakeSerializer());
-
-		await JsonSerializer.SerializeAsync(stream, value, opts);
+		await JsonSerializer.SerializeAsync(stream, value, ViewerJsonContext.Default.ViewerJson);
 
 		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>();
+	private static Dictionary<Snowflake, ViewerJson.JsonUser> GenerateUserList(IDatabaseFile db, HashSet<ulong> userIds, out List<Snowflake> userindex, out Dictionary<ulong, int> userIndices) {
+		var users = new Dictionary<Snowflake, ViewerJson.JsonUser>();
+		userindex = new List<Snowflake>();
+		userIndices = new Dictionary<ulong, int>();
 
 		foreach (var user in db.GetAllUsers()) {
 			var id = user.Id;
@@ -69,30 +71,23 @@ public static class ViewerJsonExport {
 				continue;
 			}
 
-			var obj = new Dictionary<string, object> {
-				["name"] = user.Name
-			};
-
-			if (user.AvatarUrl != null) {
-				obj["avatar"] = user.AvatarUrl;
-			}
-
-			if (user.Discriminator != null) {
-				obj["tag"] = user.Discriminator;
-			}
-
-			var idStr = id.ToString();
+			var idSnowflake = new Snowflake(id);
 			userIndices[id] = users.Count;
-			userindex.Add(idStr);
-			users[idStr] = obj;
+			userindex.Add(idSnowflake);
+			
+			users[idSnowflake] = new ViewerJson.JsonUser {
+				Name = user.Name,
+				Avatar = user.AvatarUrl,
+				Tag = user.Discriminator
+			};
 		}
 
 		return users;
 	}
 
-	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>();
+	private static List<ViewerJson.JsonServer> GenerateServerList(IDatabaseFile db, HashSet<ulong> serverIds, out Dictionary<ulong, int> serverIndices) {
+		var servers = new List<ViewerJson.JsonServer>();
+		serverIndices = new Dictionary<ulong, int>();
 
 		foreach (var server in db.GetAllServers()) {
 			var id = server.Id;
@@ -101,113 +96,78 @@ public static class ViewerJsonExport {
 			}
 
 			serverIndices[id] = servers.Count;
-			servers.Add(new Dictionary<string, object> {
-				["name"] = server.Name,
-				["type"] = ServerTypes.ToJsonViewerString(server.Type),
+			
+			servers.Add(new ViewerJson.JsonServer {
+				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>();
+	private static Dictionary<Snowflake, ViewerJson.JsonChannel> GenerateChannelList(List<Channel> includedChannels, Dictionary<ulong, int> serverIndices) {
+		var channels = new Dictionary<Snowflake, ViewerJson.JsonChannel>();
 
 		foreach (var channel in includedChannels) {
-			var obj = new Dictionary<string, object> {
-				["server"] = serverIndices[channel.Server],
-				["name"] = channel.Name,
+			var channelIdSnowflake = new Snowflake(channel.Id);
+			
+			channels[channelIdSnowflake] = new ViewerJson.JsonChannel {
+				Server = serverIndices[channel.Server],
+				Name = channel.Name,
+				Parent = channel.ParentId?.ToString(),
+				Position = channel.Position,
+				Topic = channel.Topic,
+				Nsfw = channel.Nsfw
 			};
-
-			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>>();
+	private static Dictionary<Snowflake, Dictionary<Snowflake, ViewerJson.JsonMessage>> GenerateMessageList(List<Message> includedMessages, Dictionary<ulong, int> userIndices, IViewerExportStrategy strategy) {
+		var data = new Dictionary<Snowflake, Dictionary<Snowflake, ViewerJson.JsonMessage>>();
 
 		foreach (var grouping in includedMessages.GroupBy(static message => message.Channel)) {
-			var channel = grouping.Key.ToString();
-			var channelData = new Dictionary<string, object>();
+			var channelIdSnowflake = new Snowflake(grouping.Key);
+			var channelData = new Dictionary<Snowflake, ViewerJson.JsonMessage>();
 
 			foreach (var message in grouping) {
-				var obj = new Dictionary<string, object> {
-					["u"] = userIndices[message.Sender],
-					["t"] = message.Timestamp,
-				};
+				var messageIdSnowflake = new Snowflake(message.Id);
 				
-				if (!string.IsNullOrEmpty(message.Text)) {
-					obj["m"] = message.Text;
-				}
+				channelData[messageIdSnowflake] = new ViewerJson.JsonMessage {
+					U = userIndices[message.Sender],
+					T = message.Timestamp,
+					M = string.IsNullOrEmpty(message.Text) ? null : message.Text,
+					Te = message.EditTimestamp,
+					R = message.RepliedToId?.ToString(),
 					
-				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.NormalizedUrl, UriKind.Absolute, out var uri) ? Path.GetFileName(uri.LocalPath) : attachment.NormalizedUrl },
+					A = message.Attachments.IsEmpty ? null : message.Attachments.Select(attachment => {
+						var a = new ViewerJson.JsonMessageAttachment {
+							Url = strategy.GetAttachmentUrl(attachment),
+							Name = Uri.TryCreate(attachment.NormalizedUrl, UriKind.Absolute, out var uri) ? Path.GetFileName(uri.LocalPath) : attachment.NormalizedUrl
 						};
 
 						if (attachment is { Width: not null, Height: not null }) {
-							a["width"] = attachment.Width;
-							a["height"] = attachment.Height;
+							a.Width = attachment.Width;
+							a.Height = attachment.Height;
 						}
 
 						return a;
-					}).ToArray();
-				}
+					}).ToArray(),
 					
-				if (!message.Embeds.IsEmpty) {
-					obj["e"] = message.Embeds.Select(static embed => embed.Json).ToArray();
-				}
+					E = message.Embeds.IsEmpty ? null : 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;
+					Re = message.Reactions.IsEmpty ? null : message.Reactions.Select(static reaction => new ViewerJson.JsonMessageReaction {
+						Id = reaction.EmojiId?.ToString(),
+						N = reaction.EmojiName,
+						A = reaction.EmojiFlags.HasFlag(EmojiFlags.Animated),
+						C = reaction.Count
+					}).ToArray()
+				};
 			}
 
-			data[channel] = channelData;
+			data[channelIdSnowflake] = channelData;
 		}
 
 		return data;

app/Server/Database/Export/ViewerJsonSnowflakeSerializer.cs

@@ -1,15 +0,0 @@
-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()!);
-	}
-
-	public override void Write(Utf8JsonWriter writer, ulong value, JsonSerializerOptions options) {
-		writer.WriteStringValue(value.ToString());
-	}
-}

app/Server/Database/IDatabaseFile.cs

@@ -23,7 +23,7 @@ public interface IDatabaseFile : IDisposable {
 
 	void AddMessages(Message[] messages);
 	int CountMessages(MessageFilter? filter = null);
-	List<Message> GetMessages(MessageFilter? filter = null);
+	List<Message> GetMessages(MessageFilter? filter = null, bool includeText = true);
 	HashSet<ulong> GetMessageIds(MessageFilter? filter = null);
 	void RemoveMessages(MessageFilter filter, FilterRemovalMode mode);
 

app/Server/Database/Import/DiscordEmbedLegacyJson.cs

@@ -0,0 +1,23 @@
+using System.Text.Json.Serialization;
+
+namespace DHT.Server.Database.Import; 
+
+sealed class DiscordEmbedLegacyJson {
+	public required string Url { get; init; }
+	public required string Type { get; init; }
+	
+	public bool DhtLegacy { get; } = true;
+
+	[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+	public string? Title { get; init; }
+	
+	[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+	public string? Description { get; init; }
+
+	[JsonIgnore(Condition = JsonIgnoreCondition.WhenWritingNull)]
+	public ImageJson? Image { get; init; }
+
+	public sealed class ImageJson {
+		public required string Url { get; init; }
+	}
+}

app/Server/Database/Import/DiscordEmbedLegacyJsonContext.cs

@@ -0,0 +1,7 @@
+using System.Text.Json.Serialization;
+
+namespace DHT.Server.Database.Import;
+
+[JsonSourceGenerationOptions(PropertyNamingPolicy = JsonKnownNamingPolicy.SnakeCaseLower, GenerationMode = JsonSourceGenerationMode.Default)]
+[JsonSerializable(typeof(DiscordEmbedLegacyJson))]
+sealed partial class DiscordEmbedLegacyJsonContext : JsonSerializerContext {}

app/Server/Database/Import/LegacyArchiveImport.cs

@@ -21,7 +21,7 @@ public static class 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);
+		var root = await JsonSerializer.DeserializeAsync(stream, JsonElementContext.Default.JsonElement);
 
 		try {
 			var meta = root.RequireObject("meta");
@@ -213,29 +213,16 @@ public static class LegacyArchiveImport {
 			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 },
+			var embed = new DiscordEmbedLegacyJson {
+				Url = url,
+				Type = type,
+				Title = type == "rich" && embedObj.HasKey("t") ? embedObj.RequireString("t", path) : null,
+				Description = type == "rich" && embedObj.HasKey("d") ? embedObj.RequireString("d", path) : null,
+				Image = type == "image" ? new DiscordEmbedLegacyJson.ImageJson { Url = url } : null
 			};
 
-			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)
+				Json = JsonSerializer.Serialize(embed, DiscordEmbedLegacyJsonContext.Default.DiscordEmbedLegacyJson)
 			};
 		});
 	}

app/Server/Database/Sqlite/ISchemaUpgradeCallbacks.cs

@@ -0,0 +1,15 @@
+using System;
+using System.Threading.Tasks;
+
+namespace DHT.Server.Database.Sqlite; 
+
+public interface ISchemaUpgradeCallbacks {
+	Task<bool> CanUpgrade();
+	Task Start(int versionSteps, Func<IProgressReporter, Task> doUpgrade);
+
+	public interface IProgressReporter {
+		Task NextVersion();
+		Task MainWork(string message, int finishedItems, int totalItems);
+		Task SubWork(string message, int finishedItems, int totalItems);
+	}
+}

app/Server/Database/Sqlite/Schema.cs

@@ -1,4 +1,3 @@
-using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using DHT.Server.Database.Exceptions;
@@ -20,12 +19,8 @@ sealed class Schema {
 		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)");
+	public async Task<bool> Setup(ISchemaUpgradeCallbacks callbacks) {
+		conn.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) {
@@ -38,131 +33,133 @@ sealed class Schema {
 			throw new DatabaseTooNewException(dbVersion);
 		}
 		else if (dbVersion < Version) {
-			var proceed = await checkCanUpgradeSchemas();
+			var proceed = await callbacks.CanUpgrade();
 			if (!proceed) {
 				return false;
 			}
 
-			UpgradeSchemas(dbVersion);
+			await callbacks.Start(Version - dbVersion, async reporter => await UpgradeSchemas(dbVersion, reporter));
 		}
 
 		return true;
 	}
 
 	private void InitializeSchemas() {
-		Execute("""
-				CREATE TABLE users (
-					id            INTEGER PRIMARY KEY NOT NULL,
-					name          TEXT NOT NULL,
-					avatar_url    TEXT,
-					discriminator TEXT
-				)
-				""");
+		conn.Execute("""
+		             CREATE TABLE users (
+		             	id            INTEGER PRIMARY KEY NOT NULL,
+		             	name          TEXT NOT NULL,
+		             	avatar_url    TEXT,
+		             	discriminator TEXT
+		             )
+		             """);
 
-		Execute("""
-				CREATE TABLE servers (
-					id   INTEGER PRIMARY KEY NOT NULL,
-					name TEXT NOT NULL,
-					type TEXT NOT NULL
-				)
-				""");
+		conn.Execute("""
+		             CREATE TABLE servers (
+		             	id   INTEGER PRIMARY KEY NOT NULL,
+		             	name TEXT NOT NULL,
+		             	type TEXT NOT NULL
+		             )
+		             """);
 
-		Execute("""
-				CREATE TABLE channels (
-					id        INTEGER PRIMARY KEY NOT NULL,
-					server    INTEGER NOT NULL,
-					name      TEXT NOT NULL,
-					parent_id INTEGER,
-					position  INTEGER,
-					topic     TEXT,
-					nsfw      INTEGER
-				)
-				""");
+		conn.Execute("""
+		             CREATE TABLE channels (
+		             	id        INTEGER PRIMARY KEY NOT NULL,
+		             	server    INTEGER NOT NULL,
+		             	name      TEXT NOT NULL,
+		             	parent_id INTEGER,
+		             	position  INTEGER,
+		             	topic     TEXT,
+		             	nsfw      INTEGER
+		             )
+		             """);
 
-		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
-				)
-				""");
+		conn.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 (
-					message_id     INTEGER NOT NULL,
-					attachment_id  INTEGER NOT NULL PRIMARY KEY NOT NULL,
-					name           TEXT NOT NULL,
-					type           TEXT,
-					normalized_url TEXT NOT NULL,
-					download_url   TEXT,
-					size           INTEGER NOT NULL,
-					width          INTEGER,
-					height         INTEGER
-				)
-				""");
+		conn.Execute("""
+		             CREATE TABLE attachments (
+		             	message_id     INTEGER NOT NULL,
+		             	attachment_id  INTEGER NOT NULL PRIMARY KEY NOT NULL,
+		             	name           TEXT NOT NULL,
+		             	type           TEXT,
+		             	normalized_url TEXT NOT NULL,
+		             	download_url   TEXT,
+		             	size           INTEGER NOT NULL,
+		             	width          INTEGER,
+		             	height         INTEGER
+		             )
+		             """);
 
-		Execute("""
-				CREATE TABLE embeds (
-					message_id INTEGER NOT NULL,
-					json       TEXT NOT NULL
-				)
-				""");
+		conn.Execute("""
+		             CREATE TABLE embeds (
+		             	message_id INTEGER NOT NULL,
+		             	json       TEXT NOT NULL
+		             )
+		             """);
 
-		Execute("""
-				CREATE TABLE downloads (
-					normalized_url TEXT NOT NULL PRIMARY KEY,
-					download_url   TEXT,
-					status         INTEGER NOT NULL,
-					size           INTEGER NOT NULL,
-					blob           BLOB
-				)
-				""");
+		conn.Execute("""
+		             CREATE TABLE downloads (
+		             	normalized_url TEXT NOT NULL PRIMARY KEY,
+		             	download_url   TEXT,
+		             	status         INTEGER NOT NULL,
+		             	size           INTEGER NOT NULL,
+		             	blob           BLOB
+		             )
+		             """);
 		
-		Execute("""
-				CREATE TABLE reactions (
-					message_id  INTEGER NOT NULL,
-					emoji_id    INTEGER,
-					emoji_name  TEXT,
-					emoji_flags INTEGER NOT NULL,
-					count       INTEGER NOT NULL
-				)
-				""");
+		conn.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();
 
-		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)");
+		conn.Execute("CREATE INDEX attachments_message_ix ON attachments(message_id)");
+		conn.Execute("CREATE INDEX embeds_message_ix ON embeds(message_id)");
+		conn.Execute("CREATE INDEX reactions_message_ix ON reactions(message_id)");
 
-		Execute("INSERT INTO metadata (key, value) VALUES ('version', " + Version + ")");
+		conn.Execute("INSERT INTO metadata (key, value) VALUES ('version', " + Version + ")");
 	}
 
 	private void CreateMessageEditTimestampTable() {
-		Execute("""
-				CREATE TABLE edit_timestamps (
-					message_id     INTEGER PRIMARY KEY NOT NULL,
-					edit_timestamp INTEGER NOT NULL
-				)
-				""");
+		conn.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 (
-					message_id    INTEGER PRIMARY KEY NOT NULL,
-					replied_to_id INTEGER NOT NULL
-				)
-				""");
+		conn.Execute("""
+		             CREATE TABLE replied_to (
+		             	message_id    INTEGER PRIMARY KEY NOT NULL,
+		             	replied_to_id INTEGER NOT NULL
+		             )
+		             """);
 	}
 
-	private void NormalizeAttachmentUrls() {
+	private async Task NormalizeAttachmentUrls(ISchemaUpgradeCallbacks.IProgressReporter reporter) {
+		await reporter.SubWork("Preparing attachments...", 0, 0);
+		
 		var normalizedUrls = new Dictionary<long, string>();
 
-		using (var selectCmd = conn.Command("SELECT attachment_id, url FROM attachments")) {
-			using var reader = selectCmd.ExecuteReader();
+		await using (var selectCmd = conn.Command("SELECT attachment_id, url FROM attachments")) {
+			await using var reader = await selectCmd.ExecuteReaderAsync();
 			
 			while (reader.Read()) {
 				var attachmentId = reader.GetInt64(0);
@@ -171,28 +168,39 @@ sealed class Schema {
 			}
 		}
 
-		using var tx = conn.BeginTransaction();
+		await using var tx = conn.BeginTransaction();
 
-		using (var updateCmd = conn.Command("UPDATE attachments SET download_url = url, url = :normalized_url WHERE attachment_id = :attachment_id")) {
+		int totalUrls = normalizedUrls.Count;
+		int processedUrls = -1;
+
+		await using (var updateCmd = conn.Command("UPDATE attachments SET download_url = url, url = :normalized_url WHERE attachment_id = :attachment_id")) {
 			updateCmd.Parameters.Add(":attachment_id", SqliteType.Integer);
 			updateCmd.Parameters.Add(":normalized_url", SqliteType.Text);
 				
 			foreach (var (attachmentId, normalizedUrl) in normalizedUrls) {
+				if (++processedUrls % 1000 == 0) {
+					await reporter.SubWork("Updating URLs...", processedUrls, totalUrls);
+				}
+
 				updateCmd.Set(":attachment_id", attachmentId);
 				updateCmd.Set(":normalized_url", normalizedUrl);
 				updateCmd.ExecuteNonQuery();
 			}
 		}
 		
-		tx.Commit();
+		await reporter.SubWork("Updating URLs...", totalUrls, totalUrls);
+		
+		await tx.CommitAsync();
 	}
 
-	private void NormalizeDownloadUrls() {
+	private async Task NormalizeDownloadUrls(ISchemaUpgradeCallbacks.IProgressReporter reporter) {
+		await reporter.SubWork("Preparing downloads...", 0, 0);
+		
 		var normalizedUrlsToOriginalUrls = new Dictionary<string, string>();
 		var duplicateUrlsToDelete = new HashSet<string>();
 
-		using (var selectCmd = conn.Command("SELECT url FROM downloads ORDER BY CASE WHEN status = 200 THEN 0 ELSE 1 END")) {
-			using var reader = selectCmd.ExecuteReader();
+		await using (var selectCmd = conn.Command("SELECT url FROM downloads ORDER BY CASE WHEN status = 200 THEN 0 ELSE 1 END")) {
+			await using var reader = await selectCmd.ExecuteReaderAsync();
 
 			while (reader.Read()) {
 				var originalUrl = reader.GetString(0);
@@ -204,96 +212,144 @@ sealed class Schema {
 			}
 		}
 
-		using var tx = conn.BeginTransaction();
+		conn.Execute("PRAGMA cache_size = -20000");
 
-		using (var deleteCmd = conn.Delete("downloads", ("url", SqliteType.Text))) {
-			foreach (var duplicateUrl in duplicateUrlsToDelete) {
-				deleteCmd.Set(":url", duplicateUrl);
-				deleteCmd.ExecuteNonQuery();
+		SqliteTransaction tx;
+		
+		await using (tx = conn.BeginTransaction()) {
+			await reporter.SubWork("Deleting duplicates...", 0, 0);
+
+			await using (var deleteCmd = conn.Delete("downloads", ("url", SqliteType.Text))) {
+				foreach (var duplicateUrl in duplicateUrlsToDelete) {
+					deleteCmd.Set(":url", duplicateUrl);
+					deleteCmd.ExecuteNonQuery();
+				}
 			}
+			
+			await tx.CommitAsync();
 		}
 
-		using (var updateCmd = conn.Command("UPDATE downloads SET download_url = :download_url, url = :normalized_url WHERE url = :download_url")) {
+		int totalUrls = normalizedUrlsToOriginalUrls.Count;
+		int processedUrls = -1;
+
+		tx = conn.BeginTransaction();
+		
+		await using (var updateCmd = conn.Command("UPDATE downloads SET download_url = :download_url, url = :normalized_url WHERE url = :download_url")) {
 			updateCmd.Parameters.Add(":normalized_url", SqliteType.Text);
 			updateCmd.Parameters.Add(":download_url", SqliteType.Text);
 			
 			foreach (var (normalizedUrl, downloadUrl) in normalizedUrlsToOriginalUrls) {
+				if (++processedUrls % 100 == 0) {
+					await reporter.SubWork("Updating URLs...", processedUrls, totalUrls);
+					
+					// Not proper way of dealing with transactions, but it avoids a long commit at the end.
+					// Schema upgrades are already non-atomic anyways, so this doesn't make it worse.
+					await tx.CommitAsync();
+					await tx.DisposeAsync();
+					
+					tx = conn.BeginTransaction();
+					updateCmd.Transaction = tx;
+				}
+
 				updateCmd.Set(":normalized_url", normalizedUrl);
 				updateCmd.Set(":download_url", downloadUrl);
 				updateCmd.ExecuteNonQuery();
 			}
 		}
 		
-		tx.Commit();
+		await reporter.SubWork("Updating URLs...", totalUrls, totalUrls);
+		
+		await tx.CommitAsync();
+		await tx.DisposeAsync();
+		
+		conn.Execute("PRAGMA cache_size = -2000");
 	}
 
-	private void UpgradeSchemas(int dbVersion) {
+	private async Task UpgradeSchemas(int dbVersion, ISchemaUpgradeCallbacks.IProgressReporter reporter) {
 		var perf = Log.Start("from version " + dbVersion);
 
-		Execute("UPDATE metadata SET value = " + Version + " WHERE key = 'version'");
+		conn.Execute("UPDATE metadata SET value = " + Version + " WHERE key = 'version'");
 
 		if (dbVersion <= 1) {
-			Execute("ALTER TABLE channels ADD parent_id INTEGER");
+			await reporter.MainWork("Applying schema changes...", 0, 1);
+			conn.Execute("ALTER TABLE channels ADD parent_id INTEGER");
+			
 			perf.Step("Upgrade to version 2");
+			await reporter.NextVersion();
 		}
 
 		if (dbVersion <= 2) {
+			await reporter.MainWork("Applying schema changes...", 0, 1);
+			
 			CreateMessageEditTimestampTable();
 			CreateMessageRepliedToTable();
 
-			Execute("""
-					INSERT INTO edit_timestamps (message_id, edit_timestamp)
-					SELECT message_id, edit_timestamp
-					FROM messages
-					WHERE edit_timestamp IS NOT NULL
-					""");
+			conn.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)
-					SELECT message_id, replied_to_id
-					FROM messages
-					WHERE replied_to_id IS NOT NULL
-					""");
+			conn.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");
+			conn.Execute("ALTER TABLE messages DROP COLUMN replied_to_id");
+			conn.Execute("ALTER TABLE messages DROP COLUMN edit_timestamp");
 
 			perf.Step("Upgrade to version 3");
 			
-			Execute("VACUUM");
+			await reporter.MainWork("Vacuuming the database...", 1, 1);
+			conn.Execute("VACUUM");
 			perf.Step("Vacuum");
+			
+			await reporter.NextVersion();
 		}
 
 		if (dbVersion <= 3) {
-			Execute("""
-					CREATE TABLE downloads (
-						url    TEXT NOT NULL PRIMARY KEY,
-						status INTEGER NOT NULL,
-						size   INTEGER NOT NULL,
-						blob   BLOB
-					)
-					""");
+			conn.Execute("""
+			             CREATE TABLE downloads (
+			             	url    TEXT NOT NULL PRIMARY KEY,
+			             	status INTEGER NOT NULL,
+			             	size   INTEGER NOT NULL,
+			             	blob   BLOB
+			             )
+			             """);
 			
 			perf.Step("Upgrade to version 4");
+			await reporter.NextVersion();
 		}
 
 		if (dbVersion <= 4) {
-			Execute("ALTER TABLE attachments ADD width INTEGER");
-			Execute("ALTER TABLE attachments ADD height INTEGER");
+			await reporter.MainWork("Applying schema changes...", 0, 1);
+			conn.Execute("ALTER TABLE attachments ADD width INTEGER");
+			conn.Execute("ALTER TABLE attachments ADD height INTEGER");
+			
 			perf.Step("Upgrade to version 5");
+			await reporter.NextVersion();
 		}
 
 		if (dbVersion <= 5) {
-			Execute("ALTER TABLE attachments ADD download_url TEXT");
-			Execute("ALTER TABLE downloads ADD download_url TEXT");
+			await reporter.MainWork("Applying schema changes...", 0, 3);
+			conn.Execute("ALTER TABLE attachments ADD download_url TEXT");
+			conn.Execute("ALTER TABLE downloads ADD download_url TEXT");
 			
-			NormalizeAttachmentUrls();
-			NormalizeDownloadUrls();
+			await reporter.MainWork("Updating attachments...", 1, 3);
+			await NormalizeAttachmentUrls(reporter);
 			
-			Execute("ALTER TABLE attachments RENAME COLUMN url TO normalized_url");
-			Execute("ALTER TABLE downloads RENAME COLUMN url TO normalized_url");
+			await reporter.MainWork("Updating downloads...", 2, 3);
+			await NormalizeDownloadUrls(reporter);
+			
+			await reporter.MainWork("Applying schema changes...", 3, 3);
+			conn.Execute("ALTER TABLE attachments RENAME COLUMN url TO normalized_url");
+			conn.Execute("ALTER TABLE downloads RENAME COLUMN url TO normalized_url");
 			
 			perf.Step("Upgrade to version 6");
+			await reporter.NextVersion();
 		}
 
 		perf.End();

app/Server/Database/Sqlite/SqliteDatabaseFile.cs

@@ -18,7 +18,7 @@ namespace DHT.Server.Database.Sqlite;
 public sealed class SqliteDatabaseFile : IDatabaseFile {
 	private const int DefaultPoolSize = 5;
 
-	public static async Task<SqliteDatabaseFile?> OpenOrCreate(string path, Func<Task<bool>> checkCanUpgradeSchemas) {
+	public static async Task<SqliteDatabaseFile?> OpenOrCreate(string path, ISchemaUpgradeCallbacks schemaUpgradeCallbacks, TaskScheduler computeTaskResultScheduler) {
 		var connectionString = new SqliteConnectionStringBuilder {
 			DataSource = path,
 			Mode = SqliteOpenMode.ReadWriteCreate,
@@ -27,12 +27,16 @@ public sealed class SqliteDatabaseFile : IDatabaseFile {
 		var pool = new SqliteConnectionPool(connectionString, DefaultPoolSize);
 		bool wasOpened;
 
-		using (var conn = pool.Take()) {
-			wasOpened = await new Schema(conn).Setup(checkCanUpgradeSchemas);
+		try {
+			using var conn = pool.Take();
+			wasOpened = await new Schema(conn).Setup(schemaUpgradeCallbacks);
+		} catch (Exception) {
+			pool.Dispose();
+			throw;
 		}
 
 		if (wasOpened) {
-			return new SqliteDatabaseFile(path, pool);
+			return new SqliteDatabaseFile(path, pool, computeTaskResultScheduler);
 		}
 		else {
 			pool.Dispose();
@@ -49,13 +53,13 @@ public sealed class SqliteDatabaseFile : IDatabaseFile {
 	private readonly AsyncValueComputer<long>.Single totalAttachmentsComputer;
 	private readonly AsyncValueComputer<long>.Single totalDownloadsComputer;
 
-	private SqliteDatabaseFile(string path, SqliteConnectionPool pool) {
+	private SqliteDatabaseFile(string path, SqliteConnectionPool pool, TaskScheduler computeTaskResultScheduler) {
 		this.log = Log.ForType(typeof(SqliteDatabaseFile), System.IO.Path.GetFileName(path));
 		this.pool = pool;
 
-		this.totalMessagesComputer = AsyncValueComputer<long>.WithResultProcessor(UpdateMessageStatistics).WithOutdatedResults().BuildWithComputer(ComputeMessageStatistics);
-		this.totalAttachmentsComputer = AsyncValueComputer<long>.WithResultProcessor(UpdateAttachmentStatistics).WithOutdatedResults().BuildWithComputer(ComputeAttachmentStatistics);
-		this.totalDownloadsComputer = AsyncValueComputer<long>.WithResultProcessor(UpdateDownloadStatistics).WithOutdatedResults().BuildWithComputer(ComputeDownloadStatistics);
+		this.totalMessagesComputer = AsyncValueComputer<long>.WithResultProcessor(UpdateMessageStatistics, computeTaskResultScheduler).WithOutdatedResults().BuildWithComputer(ComputeMessageStatistics);
+		this.totalAttachmentsComputer = AsyncValueComputer<long>.WithResultProcessor(UpdateAttachmentStatistics, computeTaskResultScheduler).WithOutdatedResults().BuildWithComputer(ComputeAttachmentStatistics);
+		this.totalDownloadsComputer = AsyncValueComputer<long>.WithResultProcessor(UpdateDownloadStatistics, computeTaskResultScheduler).WithOutdatedResults().BuildWithComputer(ComputeDownloadStatistics);
 
 		this.Path = path;
 		this.Statistics = new DatabaseStatistics();
@@ -356,7 +360,7 @@ public sealed class SqliteDatabaseFile : IDatabaseFile {
 		return reader.Read() ? reader.GetInt32(0) : 0;
 	}
 
-	public List<Message> GetMessages(MessageFilter? filter = null) {
+	public List<Message> GetMessages(MessageFilter? filter = null, bool includeText = true) {
 		var perf = log.Start();
 		var list = new List<Message>();
 
@@ -366,7 +370,7 @@ public sealed class SqliteDatabaseFile : IDatabaseFile {
 
 		using var conn = pool.Take();
 		using var cmd = conn.Command($"""
-		                              SELECT m.message_id, m.sender_id, m.channel_id, m.text, m.timestamp, et.edit_timestamp, rt.replied_to_id
+		                              SELECT m.message_id, m.sender_id, m.channel_id, {(includeText ? "m.text" : "NULL")}, m.timestamp, et.edit_timestamp, rt.replied_to_id
 		                              FROM messages m
 		                              LEFT JOIN edit_timestamps et ON m.message_id = et.message_id
 		                              LEFT JOIN replied_to rt ON m.message_id = rt.message_id
@@ -381,7 +385,7 @@ public sealed class SqliteDatabaseFile : IDatabaseFile {
 				Id = id,
 				Sender = reader.GetUint64(1),
 				Channel = reader.GetUint64(2),
-				Text = reader.GetString(3),
+				Text = includeText ? reader.GetString(3) : string.Empty,
 				Timestamp = reader.GetInt64(4),
 				EditTimestamp = reader.IsDBNull(5) ? null : reader.GetInt64(5),
 				RepliedToId = reader.IsDBNull(6) ? null : reader.GetUint64(6),

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

@@ -5,14 +5,19 @@ using Microsoft.Data.Sqlite;
 namespace DHT.Server.Database.Sqlite.Utils;
 
 static class SqliteExtensions {
+	public static SqliteTransaction BeginTransaction(this ISqliteConnection conn) {
+		return conn.InnerConnection.BeginTransaction();
+	}
+
 	public static SqliteCommand Command(this ISqliteConnection conn, string sql) {
 		var cmd = conn.InnerConnection.CreateCommand();
 		cmd.CommandText = sql;
 		return cmd;
 	}
 
-	public static SqliteTransaction BeginTransaction(this ISqliteConnection conn) {
-		return conn.InnerConnection.BeginTransaction();
+	public static void Execute(this ISqliteConnection conn, string sql) {
+		using var cmd = conn.Command(sql);
+		cmd.ExecuteNonQuery();
 	}
 
 	public static object? SelectScalar(this ISqliteConnection conn, string sql) {

app/Server/Endpoints/BaseEndpoint.cs

@@ -3,12 +3,9 @@ using System.Net;
 using System.Text.Json;
 using System.Threading.Tasks;
 using DHT.Server.Database;
-using DHT.Server.Service;
 using DHT.Utils.Http;
 using DHT.Utils.Logging;
 using Microsoft.AspNetCore.Http;
-using Microsoft.AspNetCore.Http.Extensions;
-using Microsoft.Extensions.Primitives;
 
 namespace DHT.Server.Endpoints;
 
@@ -16,25 +13,14 @@ abstract class BaseEndpoint {
 	private static readonly Log Log = Log.ForType<BaseEndpoint>();
 
 	protected IDatabaseFile Db { get; }
-	protected ServerParameters Parameters { get; }
 
-	protected BaseEndpoint(IDatabaseFile db, ServerParameters parameters) {
+	protected BaseEndpoint(IDatabaseFile db) {
 		this.Db = db;
-		this.Parameters = parameters;
 	}
 
-	private async Task Handle(HttpContext ctx, StringValues token) {
-		var request = ctx.Request;
+	public async Task Handle(HttpContext ctx) {
 		var response = ctx.Response;
 
-		Log.Info("Request: " + request.GetDisplayUrl() + " (" + request.ContentLength + " B)");
-
-		if (token.Count != 1 || token[0] != Parameters.Token) {
-			Log.Error("Token: " + (token.Count == 1 ? token[0] : "<missing>"));
-			response.StatusCode = (int) HttpStatusCode.Forbidden;
-			return;
-		}
-
 		try {
 			response.StatusCode = (int) HttpStatusCode.OK;
 			var output = await Respond(ctx);
@@ -49,17 +35,13 @@ abstract class BaseEndpoint {
 		}
 	}
 
-	public async Task HandleGet(HttpContext ctx) {
-		await Handle(ctx, ctx.Request.Query["token"]);
-	}
-
-	public async Task HandlePost(HttpContext ctx) {
-		await Handle(ctx, ctx.Request.Headers["X-DHT-Token"]);
-	}
-
 	protected abstract Task<IHttpOutput> Respond(HttpContext ctx);
 
 	protected static async Task<JsonElement> ReadJson(HttpContext ctx) {
-		return await ctx.Request.ReadFromJsonAsync<JsonElement?>() ?? throw new HttpException(HttpStatusCode.UnsupportedMediaType, "This endpoint only accepts JSON.");
+		try {
+			return await ctx.Request.ReadFromJsonAsync(JsonElementContext.Default.JsonElement);
+		} catch (JsonException) {
+			throw new HttpException(HttpStatusCode.UnsupportedMediaType, "This endpoint only accepts JSON.");
+		}
 	}
 }

app/Server/Endpoints/GetAttachmentEndpoint.cs

@@ -2,14 +2,13 @@ using System.Net;
 using System.Threading.Tasks;
 using DHT.Server.Data;
 using DHT.Server.Database;
-using DHT.Server.Service;
 using DHT.Utils.Http;
 using Microsoft.AspNetCore.Http;
 
 namespace DHT.Server.Endpoints;
 
 sealed class GetAttachmentEndpoint : BaseEndpoint {
-	public GetAttachmentEndpoint(IDatabaseFile db, ServerParameters parameters) : base(db, parameters) {}
+	public GetAttachmentEndpoint(IDatabaseFile db) : base(db) {}
 
 	protected override Task<IHttpOutput> Respond(HttpContext ctx) {
 		string attachmentUrl = WebUtility.UrlDecode((string) ctx.Request.RouteValues["url"]!);

app/Server/Endpoints/GetMessagesEndpoint.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net;
+using System.Threading.Tasks;
+using DHT.Server.Data.Filters;
+using DHT.Server.Database;
+using DHT.Utils.Http;
+using Microsoft.AspNetCore.Http;
+using GetMessagesJsonContext = DHT.Server.Endpoints.Responses.GetMessagesJsonContext;
+
+namespace DHT.Server.Endpoints;
+
+sealed class GetMessagesEndpoint : BaseEndpoint {
+	public GetMessagesEndpoint(IDatabaseFile db) : base(db) {}
+
+	protected override Task<IHttpOutput> Respond(HttpContext ctx) {
+		HashSet<ulong> messageIdSet;
+		try {
+			var messageIds = ctx.Request.Query["id"];
+			messageIdSet = messageIds.Select(ulong.Parse!).ToHashSet();
+		} catch (Exception) {
+			throw new HttpException(HttpStatusCode.BadRequest, "Invalid message ids.");
+		}
+
+		var messageFilter = new MessageFilter {
+			MessageIds = messageIdSet
+		};
+		
+		var messages = Db.GetMessages(messageFilter).ToDictionary(static message => message.Id, static message => message.Text);
+		var response = new HttpOutput.Json<Dictionary<ulong, string>>(messages, GetMessagesJsonContext.Default.DictionaryUInt64String);
+		return Task.FromResult<IHttpOutput>(response);
+	}
+}

app/Server/Endpoints/GetTrackingScriptEndpoint.cs

@@ -13,12 +13,16 @@ namespace DHT.Server.Endpoints;
 sealed class GetTrackingScriptEndpoint : BaseEndpoint {
 	private static ResourceLoader Resources { get; } = new (Assembly.GetExecutingAssembly());
 	
-	public GetTrackingScriptEndpoint(IDatabaseFile db, ServerParameters parameters) : base(db, parameters) {}
+	private readonly ServerParameters serverParameters;
+	
+	public GetTrackingScriptEndpoint(IDatabaseFile db, ServerParameters parameters) : base(db) {
+		serverParameters = parameters;
+	}
 
 	protected override async Task<IHttpOutput> Respond(HttpContext ctx) {
 		string bootstrap = await Resources.ReadTextAsync("Tracker/bootstrap.js");
-		string script = bootstrap.Replace("= 0; /*[PORT]*/", "= " + Parameters.Port + ";")
-		                         .Replace("/*[TOKEN]*/", HttpUtility.JavaScriptStringEncode(Parameters.Token))
+		string script = bootstrap.Replace("= 0; /*[PORT]*/", "= " + serverParameters.Port + ";")
+		                         .Replace("/*[TOKEN]*/", HttpUtility.JavaScriptStringEncode(serverParameters.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"))

app/Server/Endpoints/Responses/GetMessagesJsonContext.cs

@@ -0,0 +1,8 @@
+using System.Collections.Generic;
+using System.Text.Json.Serialization;
+
+namespace DHT.Server.Endpoints.Responses;
+
+[JsonSourceGenerationOptions(PropertyNamingPolicy = JsonKnownNamingPolicy.CamelCase, GenerationMode = JsonSourceGenerationMode.Default)]
+[JsonSerializable(typeof(Dictionary<ulong, string>))]
+sealed partial class GetMessagesJsonContext : JsonSerializerContext {}

app/Server/Endpoints/TrackChannelEndpoint.cs

@@ -3,14 +3,13 @@ using System.Text.Json;
 using System.Threading.Tasks;
 using DHT.Server.Data;
 using DHT.Server.Database;
-using DHT.Server.Service;
 using DHT.Utils.Http;
 using Microsoft.AspNetCore.Http;
 
 namespace DHT.Server.Endpoints;
 
 sealed class TrackChannelEndpoint : BaseEndpoint {
-	public TrackChannelEndpoint(IDatabaseFile db, ServerParameters parameters) : base(db, parameters) {}
+	public TrackChannelEndpoint(IDatabaseFile db) : base(db) {}
 
 	protected override async Task<IHttpOutput> Respond(HttpContext ctx) {
 		var root = await ReadJson(ctx);

app/Server/Endpoints/TrackMessagesEndpoint.cs

@@ -9,7 +9,6 @@ using DHT.Server.Data;
 using DHT.Server.Data.Filters;
 using DHT.Server.Database;
 using DHT.Server.Download;
-using DHT.Server.Service;
 using DHT.Utils.Collections;
 using DHT.Utils.Http;
 using Microsoft.AspNetCore.Http;
@@ -17,7 +16,10 @@ using Microsoft.AspNetCore.Http;
 namespace DHT.Server.Endpoints;
 
 sealed class TrackMessagesEndpoint : BaseEndpoint {
-	public TrackMessagesEndpoint(IDatabaseFile db, ServerParameters parameters) : base(db, parameters) {}
+	private const string HasNewMessages = "1";
+	private const string NoNewMessages = "0";
+	
+	public TrackMessagesEndpoint(IDatabaseFile db) : base(db) {}
 
 	protected override async Task<IHttpOutput> Respond(HttpContext ctx) {
 		var root = await ReadJson(ctx);
@@ -41,7 +43,7 @@ sealed class TrackMessagesEndpoint : BaseEndpoint {
 
 		Db.AddMessages(messages);
 
-		return new HttpOutput.Json(anyNewMessages ? 1 : 0);
+		return new HttpOutput.Text(anyNewMessages ? HasNewMessages : NoNewMessages);
 	}
 
 	private static Message ReadMessage(JsonElement json, string path) => new() {

app/Server/Endpoints/TrackUsersEndpoint.cs

@@ -3,14 +3,13 @@ using System.Text.Json;
 using System.Threading.Tasks;
 using DHT.Server.Data;
 using DHT.Server.Database;
-using DHT.Server.Service;
 using DHT.Utils.Http;
 using Microsoft.AspNetCore.Http;
 
 namespace DHT.Server.Endpoints;
 
 sealed class TrackUsersEndpoint : BaseEndpoint {
-	public TrackUsersEndpoint(IDatabaseFile db, ServerParameters parameters) : base(db, parameters) {}
+	public TrackUsersEndpoint(IDatabaseFile db) : base(db) {}
 
 	protected override async Task<IHttpOutput> Respond(HttpContext ctx) {
 		var root = await ReadJson(ctx);

app/Server/Service/Middlewares/ServerAuthorizationMiddleware.cs

@@ -0,0 +1,44 @@
+using System.Net;
+using System.Threading.Tasks;
+using DHT.Utils.Logging;
+using Microsoft.AspNetCore.Http;
+using Microsoft.Extensions.Primitives;
+
+namespace DHT.Server.Service.Middlewares;
+
+sealed class ServerAuthorizationMiddleware {
+	private static readonly Log Log = Log.ForType<ServerAuthorizationMiddleware>();
+
+	private readonly RequestDelegate next;
+	private readonly ServerParameters serverParameters;
+
+	public ServerAuthorizationMiddleware(RequestDelegate next, ServerParameters serverParameters) {
+		this.next = next;
+		this.serverParameters = serverParameters;
+	}
+
+	public async Task InvokeAsync(HttpContext context) {
+		var request = context.Request;
+
+		bool success = HttpMethods.IsGet(request.Method)
+			               ? CheckToken(request.Query["token"])
+			               : CheckToken(request.Headers["X-DHT-Token"]);
+
+		if (success) {
+			await next(context);
+		}
+		else {
+			context.Response.StatusCode = (int) HttpStatusCode.Forbidden;
+		}
+	}
+
+	private bool CheckToken(StringValues token) {
+		if (token.Count == 1 && token[0] == serverParameters.Token) {
+			return true;
+		}
+		else {
+			Log.Error("Invalid token: " + (token.Count == 1 ? token[0] : "<missing>"));
+			return false;
+		}
+	}
+}

app/Server/Service/Middlewares/ServerLoggingMiddleware.cs

@@ -0,0 +1,29 @@
+using System.Diagnostics;
+using System.Threading.Tasks;
+using DHT.Utils.Logging;
+using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Http.Extensions;
+
+namespace DHT.Server.Service.Middlewares; 
+
+sealed class ServerLoggingMiddleware {
+	private static readonly Log Log = Log.ForType<ServerLoggingMiddleware>();
+	
+	private readonly RequestDelegate next;
+	
+	public ServerLoggingMiddleware(RequestDelegate next) {
+		this.next = next;
+	}
+
+	public async Task InvokeAsync(HttpContext context) {
+		var stopwatch = Stopwatch.StartNew();
+		await next(context);
+		stopwatch.Stop();
+		
+		var request = context.Request;
+		var requestLength = request.ContentLength ?? 0L;
+		var responseStatus = context.Response.StatusCode;
+		var elapsedMs = stopwatch.ElapsedMilliseconds;
+		Log.Debug("Request to " + request.GetEncodedPathAndQuery() + " (" + requestLength + " B) returned " + responseStatus + ", took " + elapsedMs + " ms");
+	}
+}

app/Server/Service/ServerLauncher.cs

@@ -4,7 +4,6 @@ using System.Diagnostics.CodeAnalysis;
 using System.Threading;
 using DHT.Server.Database;
 using DHT.Utils.Logging;
-using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Server.Kestrel.Core;
 using Microsoft.Extensions.DependencyInjection;
@@ -75,11 +74,11 @@ public static class ServerLauncher {
 			options.ListenLocalhost(port, static listenOptions => listenOptions.Protocols = HttpProtocols.Http1);
 		}
 
-		Server = WebHost.CreateDefaultBuilder()
-		                .ConfigureServices(AddServices)
-		                .UseKestrel(SetKestrelOptions)
-		                .UseStartup<Startup>()
-		                .Build();
+		Server = new WebHostBuilder()
+		         .ConfigureServices(AddServices)
+		         .UseKestrel(SetKestrelOptions)
+		         .UseStartup<Startup>()
+		         .Build();
 
 		Server.Start();
 

app/Server/Service/ServerStartup.cs

@@ -2,6 +2,7 @@ using System.Diagnostics.CodeAnalysis;
 using System.Text.Json.Serialization;
 using DHT.Server.Database;
 using DHT.Server.Endpoints;
+using DHT.Server.Service.Middlewares;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Http.Json;
 using Microsoft.Extensions.DependencyInjection;
@@ -15,6 +16,7 @@ sealed class Startup {
 		"https://ptb.discord.com",
 		"https://canary.discord.com",
 		"https://discordapp.com",
+		"null" // For file:// protocol in the Viewer
 	};
 
 	public void ConfigureServices(IServiceCollection services) {
@@ -27,27 +29,24 @@ sealed class Startup {
 				builder.WithOrigins(AllowedOrigins).AllowCredentials().AllowAnyMethod().AllowAnyHeader().WithExposedHeaders("X-DHT");
 			});
 		});
+		
+		services.AddRoutingCore();
 	}
 
 	[SuppressMessage("ReSharper", "UnusedMember.Global")]
 	public void Configure(IApplicationBuilder app, IHostApplicationLifetime lifetime, IDatabaseFile db, ServerParameters parameters) {
-		app.UseRouting();
+		app.UseMiddleware<ServerLoggingMiddleware>();
 		app.UseCors();
+		app.UseMiddleware<ServerAuthorizationMiddleware>();
+		app.UseRouting();
+		
 		app.UseEndpoints(endpoints => {
-			GetTrackingScriptEndpoint getTrackingScript = new (db, parameters);
-			endpoints.MapGet("/get-tracking-script", context => getTrackingScript.HandleGet(context));
-			
-			TrackChannelEndpoint trackChannel = new (db, parameters);
-			endpoints.MapPost("/track-channel", context => trackChannel.HandlePost(context));
-
-			TrackUsersEndpoint trackUsers = new (db, parameters);
-			endpoints.MapPost("/track-users", context => trackUsers.HandlePost(context));
-
-			TrackMessagesEndpoint trackMessages = new (db, parameters);
-			endpoints.MapPost("/track-messages", context => trackMessages.HandlePost(context));
-
-			GetAttachmentEndpoint getAttachment = new (db, parameters);
-			endpoints.MapGet("/get-attachment/{url}", context => getAttachment.HandleGet(context));
+			endpoints.MapGet("/get-tracking-script", new GetTrackingScriptEndpoint(db, parameters).Handle);
+			endpoints.MapGet("/get-messages", new GetMessagesEndpoint(db).Handle);
+			endpoints.MapGet("/get-attachment/{url}", new GetAttachmentEndpoint(db).Handle);
+			endpoints.MapPost("/track-channel", new TrackChannelEndpoint(db).Handle);
+			endpoints.MapPost("/track-users", new TrackUsersEndpoint(db).Handle);
+			endpoints.MapPost("/track-messages", new TrackMessagesEndpoint(db).Handle);
 		});
 	}
 }

app/Utils/Http/HttpOutput.cs

@@ -1,3 +1,5 @@
+using System.Text;
+using System.Text.Json.Serialization.Metadata;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
 
@@ -12,15 +14,29 @@ public static class HttpOutput {
 		}
 	}
 
-	public sealed class Json : IHttpOutput {
-		private readonly object? obj;
+	public sealed class Text : IHttpOutput {
+		private readonly string text;
 
-		public Json(object? obj) {
-			this.obj = obj;
+		public Text(string text) {
+			this.text = text;
 		}
 
 		public Task WriteTo(HttpResponse response) {
-			return response.WriteAsJsonAsync(obj);
+			return response.WriteAsync(text, Encoding.UTF8);
+		}
+	}
+
+	public sealed class Json<TValue> : IHttpOutput {
+		private readonly TValue value;
+		private readonly JsonTypeInfo<TValue> typeInfo;
+
+		public Json(TValue value, JsonTypeInfo<TValue> typeInfo) {
+			this.value = value;
+			this.typeInfo = typeInfo;
+		}
+
+		public Task WriteTo(HttpResponse response) {
+			return response.WriteAsJsonAsync(value, typeInfo);
 		}
 	}
 

app/Utils/Http/JsonElementContext.cs

@@ -0,0 +1,8 @@
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace DHT.Utils.Http;
+
+[JsonSourceGenerationOptions(PropertyNamingPolicy = JsonKnownNamingPolicy.CamelCase, GenerationMode = JsonSourceGenerationMode.Default)]
+[JsonSerializable(typeof(JsonElement))]
+public sealed partial class JsonElementContext : JsonSerializerContext {}

app/Utils/Logging/WindowsConsole.cs

@@ -0,0 +1,13 @@
+using System.Runtime.InteropServices;
+using System.Runtime.Versioning;
+
+namespace DHT.Utils.Logging; 
+
+[SupportedOSPlatform("windows")]
+public static partial class WindowsConsole {
+	[LibraryImport("kernel32.dll", SetLastError = true)]
+	public static partial void AllocConsole();
+
+	[LibraryImport("kernel32.dll", SetLastError = true)]
+	public static partial void FreeConsole();
+}

app/Utils/Utils.csproj

@@ -6,6 +6,10 @@
     <PackageId>DiscordHistoryTrackerUtils</PackageId>
   </PropertyGroup>
   
+  <PropertyGroup>
+    <AllowUnsafeBlocks>true</AllowUnsafeBlocks>
+  </PropertyGroup>
+  
   <ItemGroup>
     <FrameworkReference Include="Microsoft.AspNetCore.App" />
   </ItemGroup>

app/Version.cs

@@ -8,5 +8,5 @@ using DHT.Utils;
 namespace DHT.Utils; 
 
 static class Version {
-	public const string Tag = "39.0.0.0";
+	public const string Tag = "39.1.0.0";
 }

app/build.bat

@@ -4,11 +4,11 @@ set list=win-x64 linux-x64 osx-x64
 rmdir /S /Q bin
 
 (for %%a in (%list%) do (
-  dotnet publish Desktop -c Release -r %%a -o ./bin/%%a -p:PublishSingleFile=true -p:IncludeNativeLibrariesForSelfExtract=true -p:PublishReadyToRun=false --self-contained true
+  dotnet publish Desktop -c Release -r %%a -o ./bin/%%a --self-contained true
   powershell "Compress-Archive -Path ./bin/%%a/* -DestinationPath ./bin/%%a.zip -CompressionLevel Optimal"
 ))
 
-dotnet publish Desktop -c Release -o ./bin/portable -p:PublishTrimmed=false --self-contained false
+dotnet publish Desktop -c Release -o ./bin/portable -p:PublishSingleFile=false -p:PublishTrimmed=false --self-contained false
 powershell "Compress-Archive -Path ./bin/portable/* -DestinationPath ./bin/portable.zip -CompressionLevel Optimal"
 
 echo Done

app/build.sh

@@ -17,9 +17,9 @@ rm -rf "./bin"
 configurations=(win-x64 linux-x64 osx-x64)
 
 for cfg in ${configurations[@]}; do
-	dotnet publish Desktop -c Release -r "$cfg" -o "./bin/$cfg" -p:PublishSingleFile=true -p:IncludeNativeLibrariesForSelfExtract=true -p:PublishReadyToRun=false --self-contained true
+	dotnet publish Desktop -c Release -r "$cfg" -o "./bin/$cfg" --self-contained true
 	makezip "$cfg"
 done
 
-dotnet publish Desktop -c Release -o "./bin/portable" -p:PublishTrimmed=false --self-contained false
+dotnet publish Desktop -c Release -o "./bin/portable" -p:PublishSingleFile=false -p:PublishTrimmed=false --self-contained false
 makezip "portable"