Basic exception overlay

NexusMods.App.sln

@@ -286,6 +286,8 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NexusMods.Networking.Steam.
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NexusMods.Abstractions.Hashes", "src\Abstractions\NexusMods.Abstractions.Hashes\NexusMods.Abstractions.Hashes.csproj", "{AF703852-D7B0-4BAD-8C75-B6046C6F0490}"
 EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "NexusMods.Abstractions.Logging", "src\Abstractions\NexusMods.Abstractions.Logging\NexusMods.Abstractions.Logging.csproj", "{9DE1C2AC-927A-4BC6-B2A1-7016902F8BAE}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -752,6 +754,10 @@ Global
 		{AF703852-D7B0-4BAD-8C75-B6046C6F0490}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{AF703852-D7B0-4BAD-8C75-B6046C6F0490}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{AF703852-D7B0-4BAD-8C75-B6046C6F0490}.Release|Any CPU.Build.0 = Release|Any CPU
+		{9DE1C2AC-927A-4BC6-B2A1-7016902F8BAE}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9DE1C2AC-927A-4BC6-B2A1-7016902F8BAE}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9DE1C2AC-927A-4BC6-B2A1-7016902F8BAE}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9DE1C2AC-927A-4BC6-B2A1-7016902F8BAE}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -885,6 +891,7 @@ Global
 		{24457AAA-8954-4BD6-8EB5-168EAC6EFB1B} = {0CB73565-1207-4A56-A79F-6A8E9BBD795C}
 		{17023DB9-8E31-4397-B3E1-141149987865} = {897C4198-884F-448A-B0B0-C2A6D971EAE0}
 		{AF703852-D7B0-4BAD-8C75-B6046C6F0490} = {0CB73565-1207-4A56-A79F-6A8E9BBD795C}
+		{9DE1C2AC-927A-4BC6-B2A1-7016902F8BAE} = {0CB73565-1207-4A56-A79F-6A8E9BBD795C}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {9F9F8352-34DD-42C0-8564-EE9AF34A3501}

src/Abstractions/NexusMods.Abstractions.Logging/IObservableExceptionSource.cs

@@ -0,0 +1,10 @@
+namespace NexusMods.Abstractions.Logging;
+
+/// <summary>
+/// A global source of exceptions that have been observed by the application.
+/// This allows for UI and other systems to tap into log messages.
+/// </summary>
+public interface IObservableExceptionSource
+{
+    IObservable<LogMessage> Exceptions { get; }
+}

src/Abstractions/NexusMods.Abstractions.Logging/LogMessage.cs

@@ -0,0 +1,12 @@
+namespace NexusMods.Abstractions.Logging;
+
+/// <summary>
+/// A generic log message. Exists as a record to de-couple exceptions and log messages
+/// from the backend logging targets
+/// </summary>
+/// <param name="Exception">The attached Exception (if any)</param>
+/// <param name="Message">The log's message</param>
+public record LogMessage(Exception? Exception, string Message)
+{
+
+}

src/Abstractions/NexusMods.Abstractions.Logging/NexusMods.Abstractions.Logging.csproj

@@ -0,0 +1,14 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+    <PropertyGroup>
+        <TargetFramework>net9.0</TargetFramework>
+        <ImplicitUsings>enable</ImplicitUsings>
+        <Nullable>enable</Nullable>
+    </PropertyGroup>
+
+    <ItemGroup>
+      <PackageReference Include="NLog" />
+      <PackageReference Include="System.Reactive" />
+    </ItemGroup>
+
+</Project>

src/NexusMods.App.UI/LeftMenu/Items/ApplyControl/ApplyControlViewModel.cs

@@ -26,7 +26,7 @@ public class ApplyControlViewModel : AViewModel<IApplyControlViewModel>, IApplyC
     private readonly IJobMonitor _jobMonitor;
 
     private readonly LoadoutId _loadoutId;
-    private readonly IOverlayController _overlayController;
+    private readonly IServiceProvider _serviceProvider;
     private readonly GameInstallMetadataId _gameMetadataId;
     [Reactive] private bool CanApply { get; set; } = true;
 
@@ -41,7 +41,7 @@ public class ApplyControlViewModel : AViewModel<IApplyControlViewModel>, IApplyC
     public ApplyControlViewModel(LoadoutId loadoutId, IServiceProvider serviceProvider, IJobMonitor jobMonitor, IOverlayController overlayController, GameRunningTracker gameRunningTracker)
     {
         _loadoutId = loadoutId;
-        _overlayController = overlayController;
+        _serviceProvider = serviceProvider;
         _syncService = serviceProvider.GetRequiredService<ISynchronizerService>();
         _conn = serviceProvider.GetRequiredService<IConnection>();
         _jobMonitor = serviceProvider.GetRequiredService<IJobMonitor>();
@@ -118,7 +118,7 @@ await Task.Run(async () =>
         catch (ExecutableInUseException)
         {
             var marker = NexusMods.Abstractions.Loadouts.Loadout.Load(_conn.Db, _loadoutId);
-            await MessageBoxOkViewModel.ShowGameAlreadyRunningError(_overlayController, marker.Installation.Name);
+            await MessageBoxOkViewModel.ShowGameAlreadyRunningError(_serviceProvider, marker.Installation.Name);
         }
     }
 }

src/NexusMods.App.UI/LeftMenu/Items/ApplyControl/LaunchButtonViewModel.cs

@@ -32,16 +32,16 @@ public class LaunchButtonViewModel : AViewModel<ILaunchButtonViewModel>, ILaunch
     private readonly IToolManager _toolManager;
     private readonly IConnection _conn;
     private readonly IJobMonitor _monitor;
-    private readonly IOverlayController _overlayController;
+    private readonly IServiceProvider _serviceProvider;
     private readonly GameRunningTracker _gameRunningTracker;
 
-    public LaunchButtonViewModel(ILogger<ILaunchButtonViewModel> logger, IToolManager toolManager, IConnection conn, IJobMonitor monitor, IOverlayController overlayController, GameRunningTracker gameRunningTracker)
+    public LaunchButtonViewModel(ILogger<ILaunchButtonViewModel> logger, IToolManager toolManager, IConnection conn, IJobMonitor monitor, IServiceProvider serviceProvider, GameRunningTracker gameRunningTracker)
     {
         _logger = logger;
         _toolManager = toolManager;
         _conn = conn;
         _monitor = monitor;
-        _overlayController = overlayController;
+        _serviceProvider = serviceProvider;
         _gameRunningTracker = gameRunningTracker;
 
         this.WhenActivated(cd =>
@@ -72,7 +72,7 @@ await Task.Run(async () =>
         }
         catch (ExecutableInUseException)
         {
-            await MessageBoxOkViewModel.ShowGameAlreadyRunningError(_overlayController, marker.Installation.Name);
+            await MessageBoxOkViewModel.ShowGameAlreadyRunningError(_serviceProvider, marker.Installation.Name);
         }
         catch (Exception ex)
         {

src/NexusMods.App.UI/NexusMods.App.UI.csproj

@@ -85,6 +85,7 @@
     </ItemGroup>
 
     <ItemGroup>
+        <ProjectReference Include="..\Abstractions\NexusMods.Abstractions.Logging\NexusMods.Abstractions.Logging.csproj" />
         <ProjectReference Include="..\Abstractions\NexusMods.Abstractions.NexusModsLibrary\NexusMods.Abstractions.NexusModsLibrary.csproj" />
         <ProjectReference Include="..\Abstractions\NexusMods.Abstractions.Resources.Caching\NexusMods.Abstractions.Resources.Caching.csproj" />
         <ProjectReference Include="..\Abstractions\NexusMods.Abstractions.Resources.IO\NexusMods.Abstractions.Resources.IO.csproj" />

src/NexusMods.App.UI/Overlays/Generic/MessageBox/Ok/IMessageBoxOkViewModel.cs

@@ -1,3 +1,4 @@
+using NexusMods.App.UI.Controls.MarkdownRenderer;
 using R3;
 namespace NexusMods.App.UI.Overlays.Generic.MessageBox.Ok;
 
@@ -6,6 +7,19 @@ namespace NexusMods.App.UI.Overlays.Generic.MessageBox.Ok;
 /// </summary>
 public interface IMessageBoxOkViewModel : IOverlayViewModel<Unit>
 {
+    /// <summary>
+    /// A short title for the message box.
+    /// </summary>
     public string Title { get; set; }
+
+    /// <summary>
+    /// A description of what's happening.
+    /// </summary>
     public string Description { get; set; }
+
+    /// <summary>
+    /// If provided, this will be displayed in a markdown control below the description. Use this
+    /// for more descriptive information.
+    /// </summary>
+    public IMarkdownRendererViewModel? MarkdownRenderer { get; set; }
 }

src/NexusMods.App.UI/Overlays/Generic/MessageBox/Ok/MessageBoxOkView.axaml

@@ -11,9 +11,9 @@
     xmlns:base="clr-namespace:NexusMods.App.UI.Overlays.Generic.MessageBox.Base"
     xmlns:resources="clr-namespace:NexusMods.App.UI.Resources">
 
-    <base:MessageBoxBackground MinWidth="300" MaxWidth="450">
+    <base:MessageBoxBackground MinWidth="300" MaxWidth="640">
         <base:MessageBoxBackground.TopContent>
-            <StackPanel Orientation="Vertical" Margin="24">
+            <StackPanel Orientation="Vertical" Margin="24" Spacing="16">
 
                 <!-- Title -->
                 <DockPanel HorizontalAlignment="Stretch" Margin="0,0,0,16">
@@ -30,7 +30,10 @@
                 </DockPanel>
 
                 <!-- Message -->
-                <TextBlock x:Name="MessageTextBlock" TextWrapping="WrapWithOverflow" />
+                <TextBlock x:Name="MessageTextBlock" TextWrapping="WrapWithOverflow" MaxLines="50" />
+
+                <!-- Supporting Markdown -->
+                <reactiveUi:ViewModelViewHost x:Name="MarkdownRendererViewModelViewHost" MaxHeight="640" MaxWidth="600"/>
 
             </StackPanel>
 

src/NexusMods.App.UI/Overlays/Generic/MessageBox/Ok/MessageBoxOkView.axaml.cs

@@ -1,4 +1,5 @@
 using System.Reactive.Disposables;
+using System.Reactive.Linq;
 using Avalonia.ReactiveUI;
 using R3;
 using ReactiveUI;
@@ -21,7 +22,15 @@ public MessageBoxOkView()
 
             this.OneWayBind(ViewModel, vm => vm.Description, v => v.MessageTextBlock.Text)
                 .DisposeWith(disposables);
-
+
+            this.OneWayBind(ViewModel, vm => vm.MarkdownRenderer, v => v.MarkdownRendererViewModelViewHost.ViewModel)
+                .DisposeWith(disposables);
+
+            this.WhenAnyValue(view => view.ViewModel!.MarkdownRenderer)
+                .Select(vm => vm != null)
+                .BindTo(this, v => v.MarkdownRendererViewModelViewHost.IsVisible)
+                .DisposeWith(disposables);
+
             // Bind commands
             OkButton.Command = ReactiveCommand.Create(() =>
             {

src/NexusMods.App.UI/Overlays/Generic/MessageBox/Ok/MessageBoxOkViewModel.cs

@@ -1,3 +1,5 @@
+using Microsoft.Extensions.DependencyInjection;
+using NexusMods.App.UI.Controls.MarkdownRenderer;
 using NexusMods.App.UI.Resources;
 using R3;
 using ReactiveUI.Fody.Helpers;
@@ -11,15 +13,32 @@ public class MessageBoxOkViewModel : AOverlayViewModel<IMessageBoxOkViewModel, U
     [Reactive]
     public string Description { get; set; } = "This is some very long design only text that spans multiple lines!! This text is super cool!!";
 
+    [Reactive] public required IMarkdownRendererViewModel? MarkdownRenderer { get; set; }
+
     /// <summary>
     /// Shows the 'Game is already Running' error when you try to synchronize and a game is already running (usually on Windows).
     /// </summary>
-    public static async Task ShowGameAlreadyRunningError(IOverlayController overlayController, string gameName)
+    public static Task ShowGameAlreadyRunningError(IServiceProvider serviceProvider, string gameName)
     {
-        var viewModel = new MessageBoxOkViewModel()
+        return Show(serviceProvider, Language.ErrorGameAlreadyRunning_Title, string.Format(Language.ErrorGameAlreadyRunning_Description, gameName));
+    }
+
+    public static async Task Show(IServiceProvider serviceProvider, string title, string description, string? markdown = null)
+    {
+        var overlayController = serviceProvider.GetRequiredService<IOverlayController>();
+
+        IMarkdownRendererViewModel? markdownRenderer = null;
+        if (markdown != null)
+        {
+            markdownRenderer = serviceProvider.GetRequiredService<IMarkdownRendererViewModel>();
+            markdownRenderer.Contents = markdown;
+        }
+
+        var viewModel = new MessageBoxOkViewModel
         {
-            Title = Language.ErrorGameAlreadyRunning_Title,
-            Description = string.Format(Language.ErrorGameAlreadyRunning_Description, gameName) ,
+            Title = title,
+            Description = description,
+            MarkdownRenderer = markdownRenderer,
         };
         await overlayController.EnqueueAndWait(viewModel);
     }

src/NexusMods.App.UI/Windows/MainWindowViewModel.cs

@@ -2,6 +2,7 @@
 using System.Reactive.Disposables;
 using System.Reactive.Linq;
 using Microsoft.Extensions.DependencyInjection;
+using NexusMods.Abstractions.Logging;
 using NexusMods.Abstractions.NexusWebApi;
 using NexusMods.Abstractions.UI;
 using NexusMods.App.UI.Controls.DevelopmentBuildBanner;
@@ -11,6 +12,7 @@
 using NexusMods.App.UI.LeftMenu;
 using NexusMods.App.UI.Overlays;
 using NexusMods.App.UI.Overlays.AlphaWarning;
+using NexusMods.App.UI.Overlays.Generic.MessageBox.Ok;
 using NexusMods.App.UI.Overlays.Login;
 using NexusMods.App.UI.Overlays.MetricsOptIn;
 using NexusMods.App.UI.Overlays.Updater;
@@ -48,9 +50,12 @@ public MainWindowViewModel(
 
         Spine = serviceProvider.GetRequiredService<ISpineViewModel>();
         DevelopmentBuildBanner = serviceProvider.GetRequiredService<IDevelopmentBuildBannerViewModel>();
-
+        
         this.WhenActivated(d =>
         {
+            ConnectErrors(serviceProvider)
+                .DisposeWith(d);
+
             var alphaWarningViewModel = serviceProvider.GetRequiredService<IAlphaWarningViewModel>();
             alphaWarningViewModel.WorkspaceController = WorkspaceController;
             alphaWarningViewModel.Controller = overlayController;
@@ -103,7 +108,34 @@ public MainWindowViewModel(
             }
         });
     }
-
+
+    private IDisposable ConnectErrors(IServiceProvider provider)
+    {
+        var source = provider.GetService<IObservableExceptionSource>();
+        if (source is null)
+            return Disposable.Empty;
+
+        return source.Exceptions
+            .Subscribe(msg =>
+                {
+                    var title = "Unhandled Exception";
+                    var description = msg.Message;
+                    string? details = null;
+                    if (msg.Exception != null)
+                    {
+                        details = $"""
+                                  ### Exception Details
+                                  ```
+                                    {msg.Exception}
+                                  ```  
+                                  """;
+                    }
+
+                    Task.Run(() => MessageBoxOkViewModel.Show(provider, title, description, details));
+                }
+            );
+    }
+
     internal void OnClose()
     {
         // NOTE(erri120): This gets called by the View and can't be inside the disposable

src/NexusMods.App/NexusMods.App.csproj

@@ -10,6 +10,7 @@
     </PropertyGroup>
 
     <ItemGroup>
+        <ProjectReference Include="..\Abstractions\NexusMods.Abstractions.Logging\NexusMods.Abstractions.Logging.csproj" />
         <ProjectReference Include="..\ArchiveManagement\NexusMods.FileExtractor\NexusMods.FileExtractor.csproj" />
         <ProjectReference Include="..\Games\NexusMods.Games.AdvancedInstaller.UI\NexusMods.Games.AdvancedInstaller.UI.csproj" />
         <ProjectReference Include="..\Games\NexusMods.Games.FOMOD.UI\NexusMods.Games.FOMOD.UI.csproj" />

src/NexusMods.App/ObservableLoggingTarget.cs

@@ -0,0 +1,19 @@
+using System.Reactive.Subjects;
+using NexusMods.Abstractions.Logging;
+using NLog;
+using NLog.Targets;
+
+namespace NexusMods.App;
+
+public class ObservableLoggingTarget : Target, IObservableExceptionSource
+{
+    public IObservable<LogMessage> Exceptions => _exceptions;
+
+    private Subject<LogMessage> _exceptions = new();
+
+    protected override void Write(LogEventInfo logEvent)
+    {
+        if (logEvent.Level == LogLevel.Error || logEvent.Level == LogLevel.Fatal)
+            _exceptions.OnNext(new LogMessage(logEvent.Exception, logEvent.FormattedMessage));
+    }
+}

src/NexusMods.App/Program.cs

@@ -5,6 +5,7 @@
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Hosting;
 using Microsoft.Extensions.Logging;
+using NexusMods.Abstractions.Logging;
 using NexusMods.Abstractions.Serialization;
 using NexusMods.Abstractions.Settings;
 using NexusMods.Abstractions.Telemetry;
@@ -219,6 +220,7 @@ private static IHost BuildHost(
         ExperimentalSettings experimentalSettings,
         GameLocatorSettings? gameLocatorSettings = null)
     {
+        var observableTarget = new ObservableLoggingTarget();
         var host = new HostBuilder().ConfigureServices(services =>
         {
             var s = services.AddApp(
@@ -227,18 +229,20 @@ private static IHost BuildHost(
                 experimentalSettings: experimentalSettings,
                 gameLocatorSettings: gameLocatorSettings).Validate();
 
+            s.AddSingleton<IObservableExceptionSource, ObservableLoggingTarget>(_ => observableTarget);
+
             if (startupMode.IsAvaloniaDesigner)
             {
                 s.OverrideSettingsForTests<DataModelSettings>(settings => settings with { UseInMemoryDataModel = true, });
             }
         })
-        .ConfigureLogging((_, builder) => AddLogging(builder, loggingSettings, startupMode))
+        .ConfigureLogging((_, builder) => AddLogging(observableTarget, builder, loggingSettings, startupMode))
         .Build();
 
         return host;
     }
 
-    private static void AddLogging(ILoggingBuilder loggingBuilder, LoggingSettings settings, StartupMode startupMode)
+    private static void AddLogging(ObservableLoggingTarget observableLoggingTarget, ILoggingBuilder loggingBuilder, LoggingSettings settings, StartupMode startupMode)
     {
         var fs = FileSystem.Shared;
         var config = new NLog.Config.LoggingConfiguration();
@@ -279,6 +283,7 @@ private static void AddLogging(ILoggingBuilder loggingBuilder, LoggingSettings s
         }
 
         config.AddRuleForAllLevels(fileTarget);
+        config.AddRuleForAllLevels(observableLoggingTarget);
 
 
         // NOTE(erri120): RemoveLoggerFactoryFilter prevents