Server termination and refactoring message dialogs.

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));
+        }
+    }
+}