Server termination and refactoring message dialogs.

Wino.Server/Core/ServerMessageHandlerFactory.cs

@@ -21,6 +21,7 @@ namespace Wino.Server.Core
                 nameof(ProtocolAuthorizationCallbackReceived) => App.Current.Services.GetService<ProtocolAuthActivationHandler>(),
                 nameof(SynchronizationExistenceCheckRequest) => App.Current.Services.GetService<SyncExistenceHandler>(),
                 nameof(ServerTerminationModeChanged) => App.Current.Services.GetService<ServerTerminationModeHandler>(),
+                nameof(TerminateServerRequested) => App.Current.Services.GetService<TerminateServerRequestHandler>(),
                 _ => throw new Exception($"Server handler for {typeName} is not registered."),
             };
         }
@@ -36,6 +37,7 @@ namespace Wino.Server.Core
             serviceCollection.AddTransient<ProtocolAuthActivationHandler>();
             serviceCollection.AddTransient<SyncExistenceHandler>();
             serviceCollection.AddTransient<ServerTerminationModeHandler>();
+            serviceCollection.AddTransient<TerminateServerRequestHandler>();
         }
     }
 }

Wino.Server/MessageHandlers/TerminateServerRequestHandler.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Threading;
+using System.Threading.Tasks;
+using Serilog;
+using Wino.Core.Domain.Models.Server;
+using Wino.Messaging.Server;
+using Wino.Server.Core;
+
+namespace Wino.Server.MessageHandlers
+{
+    public class TerminateServerRequestHandler : ServerMessageHandler<TerminateServerRequested, bool>
+    {
+        public override WinoServerResponse<bool> FailureDefaultResponse(Exception ex) => WinoServerResponse<bool>.CreateErrorResponse(ex.Message);
+
+        protected override Task<WinoServerResponse<bool>> HandleAsync(TerminateServerRequested message, CancellationToken cancellationToken = default)
+        {
+            // This handler is only doing the logging right now.
+            // Client will always expect success response.
+            // Server will be terminated in the server context once the client gets the response.
+
+            Log.Information("Terminate server is requested by client. Killing server.");
+
+            return Task.FromResult(WinoServerResponse<bool>.CreateSuccessResponse(true));
+        }
+    }
+}

Wino.Server/ServerContext.cs

@@ -2,6 +2,7 @@
 using System.Diagnostics;
 using System.Text.Json;
 using System.Threading.Tasks;
+using System.Windows;
 using CommunityToolkit.Mvvm.Messaging;
 using Serilog;
 using Windows.ApplicationModel;
@@ -308,12 +309,28 @@ namespace Wino.Server
                 case nameof(ServerTerminationModeChanged):
                     await ExecuteServerMessageSafeAsync(args, JsonSerializer.Deserialize<ServerTerminationModeChanged>(messageJson, _jsonSerializerOptions));
                     break;
+
+                case nameof(TerminateServerRequested):
+                    await ExecuteServerMessageSafeAsync(args, JsonSerializer.Deserialize<TerminateServerRequested>(messageJson, _jsonSerializerOptions));
+
+                    KillServer();
+                    break;
                 default:
                     Debug.WriteLine($"Missing handler for {typeName} in the server. Check ServerContext.cs - HandleServerMessageAsync.");
                     break;
             }
         }
 
+        private void KillServer()
+        {
+            DisposeConnection();
+
+            Application.Current.Dispatcher.Invoke(() =>
+            {
+                Application.Current.Shutdown();
+            });
+        }
+
         /// <summary>
         /// Executes ServerMessage coming from the UWP.
         /// These requests are awaited and expected to return a response.