Robustere Initialisierung & Routing-Refaktor

- InitializeAsync in InitializeSafeAsync mit Fehlerbehandlung umbenannt, App-Start robuster gestaltet
- Asynchrone Initialisierung bei Window.Created
- Navigation vereinheitlicht: Routing.RegisterRoute statt Doppelslash, Navigation ohne Präfix
- Flyout-Menü in AppShell deaktiviert, ShellContent-Einträge entfernt
- Login/Register-ViewModels nutzen private Felder statt ObservableProperty
- SignalRService nutzt AccessToken aus AuthSessionService
- GameStateService: Automatischer Resync bei Verbindung, Fehlerhandling verbessert
- Navigation in ViewModels an neues Routing angepasst
- Aufräumarbeiten: Entfernte auskommentierte Messenger-Registrierungen, Initialisierung vereinheitlicht

SlipItIn.AppHost/AppHost.cs

@@ -1,8 +1,7 @@
 var builder = DistributedApplication.CreateBuilder(args);
 
 var db = builder.AddPostgres("pgsql")
-                .AddDatabase("postgresdb")
+                .AddDatabase("postgresdb");
-                ;
 
 var server = builder.AddProject<Projects.SlipItIn_Server>("server")
                     .WithReference(db)

SlipItIn/App.xaml.cs

@@ -8,34 +8,47 @@ public partial class App : Application
 	public App()
 	{
 		InitializeComponent();
-		_ = InitializeAsync();
 	}
 
 	protected override Window CreateWindow(IActivationState? activationState)
 	{
 		var window = new Window(new AppShell());
+
+		window.Created += async (_, _) =>
+		{
+			await InitializeSafeAsync();
+		};
+
 		window.Resumed += async (_, _) =>
 		{
 			var gameStateService = ServiceHelper.GetRequiredService<IGameStateService>();
 			await gameStateService.ResyncAsync();
 		};
+
 		return window;
 	}
 
-	private static async Task InitializeAsync()
+	private static async Task InitializeSafeAsync()
 	{
-		var authSession = ServiceHelper.GetRequiredService<IAuthSessionService>();
+		try
-		var signalR = ServiceHelper.GetRequiredService<ISignalRService>();
-		var gameStateService = ServiceHelper.GetRequiredService<IGameStateService>();
-
-		await authSession.InitializeAsync();
-		await gameStateService.InitializeAsync();
-
-		if (!string.IsNullOrWhiteSpace(authSession.AccessToken))
 		{
-			var connected = await signalR.ConnectAsync(authSession.AccessToken);
+			var authSession = ServiceHelper.GetRequiredService<IAuthSessionService>();
-			if (connected)
+			var signalR = ServiceHelper.GetRequiredService<ISignalRService>();
-				await gameStateService.ResyncAsync();
+			var gameStateService = ServiceHelper.GetRequiredService<IGameStateService>();
+
+			await authSession.InitializeAsync();
+			await gameStateService.InitializeAsync();
+
+			if (!string.IsNullOrWhiteSpace(authSession.AccessToken))
+			{
+				var connected = await signalR.ConnectAsync(authSession.AccessToken);
+				if (connected)
+					await gameStateService.ResyncAsync();
+			}
+		}
+		catch
+		{
+			// Start darf nicht abstürzen, wenn Session/Netzwerk fehlschlägt.
 		}
 	}
 }

SlipItIn/AppShell.xaml

@@ -3,22 +3,12 @@
     x:Class="SlipItIn.AppShell"
     xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
     xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
-    xmlns:views="clr-namespace:SlipItIn.Views">
+    xmlns:views="clr-namespace:SlipItIn.Views"
+    FlyoutBehavior="Disabled">
 
     <ShellContent
+        Title="Login"
         Route="LoginPage"
         ContentTemplate="{DataTemplate views:LoginPage}" />
 
-    <ShellContent 
-        Route="RegisterPage" 
-        ContentTemplate="{DataTemplate views:RegisterPage}" />
-
-    <ShellContent 
-        Route="LobbyPage" 
-        ContentTemplate="{DataTemplate views:LobbyPage}" />
-    
-    <ShellContent 
-        Route="GameBoardPage" 
-        ContentTemplate="{DataTemplate views:GameBoardPage}" />
-
 </Shell>

SlipItIn/AppShell.xaml.cs

@@ -7,5 +7,8 @@ public partial class AppShell : Shell
 	public AppShell()
 	{
 		InitializeComponent();
+		Routing.RegisterRoute(nameof(RegisterPage), typeof(RegisterPage));
+		Routing.RegisterRoute(nameof(LobbyPage), typeof(LobbyPage));
+		Routing.RegisterRoute(nameof(GameBoardPage), typeof(GameBoardPage));
 	}
 }

SlipItIn/Services/GameStateService.cs

@@ -50,7 +50,21 @@ public class GameStateService : IGameStateService
         };
 
         _signalR.ErrorReceived += (_, error) => _messenger.Send(new ErrorOccurredMessage(error));
-        _signalR.ConnectionStateChanged += (_, connected) => _messenger.Send(new ConnectionStateChangedMessage(connected));
+        _signalR.ConnectionStateChanged += async (_, connected) =>
+        {
+            _messenger.Send(new ConnectionStateChangedMessage(connected));
+            if (connected)
+            {
+                try
+                {
+                    await ResyncAsync();
+                }
+                catch (Exception ex)
+                {
+                    _messenger.Send(new ErrorOccurredMessage($"Resync fehlgeschlagen: {ex.Message}"));
+                }
+            }
+        };
     }
 
     public async Task InitializeAsync()

SlipItIn/Services/SignalRService.cs

@@ -108,11 +108,17 @@ public class SignalRService : ISignalRService
         _hubConnection = new HubConnectionBuilder()
             .WithUrl(_configuration.HubUrl, options =>
             {
-                options.AccessTokenProvider = () => Task.FromResult<string?>(token);
+                options.AccessTokenProvider = () => Task.FromResult<string?>(_authSession.AccessToken ?? token);
             })
             .WithAutomaticReconnect([TimeSpan.Zero, TimeSpan.FromSeconds(2), TimeSpan.FromSeconds(10), TimeSpan.FromSeconds(30)])
             .Build();
 
+        _hubConnection.Reconnecting += _ =>
+        {
+            ConnectionStateChanged?.Invoke(this, false);
+            return Task.CompletedTask;
+        };
+
         _hubConnection.Closed += _ =>
         {
             ConnectionStateChanged?.Invoke(this, false);

SlipItIn/SlipItIn.csproj

@@ -110,6 +110,9 @@
 	</ItemGroup>
 
 	<ItemGroup>
+	  <MauiXaml Update="MainPage.xaml">
+	    <Generator>MSBuild:Compile</Generator>
+	  </MauiXaml>
 	  <MauiXaml Update="Views\ChallengeNotificationOverlay.xaml">
 	    <Generator>MSBuild:Compile</Generator>
 	  </MauiXaml>

SlipItIn/ViewModels/GameBoardViewModel.cs

@@ -42,7 +42,6 @@ public partial class GameBoardViewModel : BaseViewModel,
         _gameStateService = gameStateService;
         _authSession = authSession;
 
-        WeakReferenceMessenger.Default.RegisterAll(this);
         IsActive = true;
     }
 

SlipItIn/ViewModels/LobbyViewModel.cs

@@ -42,7 +42,6 @@ public partial class LobbyViewModel : BaseViewModel,
         _apiService = apiService;
 
         IsConnected = _signalR.IsConnected;
-        //WeakReferenceMessenger.Default.RegisterAll(this);
         IsActive = true;
     }
 
@@ -127,7 +126,7 @@ public partial class LobbyViewModel : BaseViewModel,
 
     public async void Receive(GameStartedMessage message)
     {
-        await MainThread.InvokeOnMainThreadAsync(() => Shell.Current.GoToAsync($"//{nameof(Views.GameBoardPage)}"));
+        await MainThread.InvokeOnMainThreadAsync(() => Shell.Current.GoToAsync(nameof(Views.GameBoardPage)));
     }
 
     public void Receive(ErrorOccurredMessage message)

SlipItIn/ViewModels/LoginViewModel.cs

@@ -14,10 +14,10 @@ public partial class LoginViewModel : BaseViewModel
     private readonly IGameStateService _gameStateService;
 
     [ObservableProperty]
-    public partial string Email { get; set; }
+    private string email = string.Empty;
 
     [ObservableProperty]
-    public partial string Password { get; set; }
+    private string password = string.Empty;
 
     public LoginViewModel(IApiService apiService, IAuthSessionService authSession, ISignalRService signalR, IGameStateService gameStateService)
     {
@@ -28,7 +28,7 @@ public partial class LoginViewModel : BaseViewModel
     }
 
     [RelayCommand]
-    private Task GoToRegisterAsync() => Shell.Current.GoToAsync($"//{nameof(RegisterPage)}");
+    private Task GoToRegisterAsync() => Shell.Current.GoToAsync(nameof(RegisterPage));
 
     [RelayCommand]
     private async Task LoginAsync()
@@ -44,7 +44,7 @@ public partial class LoginViewModel : BaseViewModel
             await _authSession.SetSessionAsync(response);
             await _signalR.ConnectAsync(response.Token);
             await _gameStateService.InitializeAsync();
-            await Shell.Current.GoToAsync($"//{nameof(LobbyPage)}");
+            await Shell.Current.GoToAsync(nameof(LobbyPage));
         }, "Anmeldung läuft...");
     }
 
@@ -53,9 +53,9 @@ public partial class LoginViewModel : BaseViewModel
     {
         bool isAuthenticated = _authSession.IsAuthenticated;
 
-        if ( isAuthenticated)
+        if (isAuthenticated)
         {
-            await Shell.Current.GoToAsync($"//{nameof(LobbyPage)}");
+            await Shell.Current.GoToAsync(nameof(LobbyPage));
         }
     }
 }

SlipItIn/ViewModels/RegisterViewModel.cs

@@ -13,13 +13,13 @@ public partial class RegisterViewModel : BaseViewModel
     private readonly ISignalRService _signalR;
 
     [ObservableProperty]
-    public partial string Username { get; set; } = string.Empty;
+    private string username = string.Empty;
 
     [ObservableProperty]
-    public partial string Email { get; set; } = string.Empty;
+    private string email = string.Empty;
 
     [ObservableProperty]
-    public partial string Password { get; set; } = string.Empty;
+    private string password = string.Empty;
 
     public RegisterViewModel(IApiService apiService, IAuthSessionService authSession, ISignalRService signalR)
     {
@@ -45,7 +45,7 @@ public partial class RegisterViewModel : BaseViewModel
 
             await _authSession.SetSessionAsync(response);
             await _signalR.ConnectAsync(response.Token);
-            await Shell.Current.GoToAsync($"//{nameof(LobbyPage)}");
+            await Shell.Current.GoToAsync(nameof(LobbyPage));
         }, "Registrierung läuft...");
     }
 }