Better messaging and better rule implementation

Room/Room.cs

@@ -3,6 +3,7 @@ using System.Text.Json;
 using System.Text.RegularExpressions;
 using MauMau_Server.Room.Messages;
 using MauMau_Server.Websockets;
+using Microsoft.AspNet.SignalR.Messaging;
 
 namespace MauMau_Server.Room;
 
@@ -24,10 +25,16 @@ public class Room
     public async Task InstantiateConnection(WebSocket socket, string name)
     {
         var connectionId = Guid.NewGuid();
-        var connection = new ConnectionInstance(name, connectionId, socket);
+
+        // If the name is empty, set it to "Mau" + the first part of the connection ID, otherwise strip potential HTML from the name and use it
+        var validatedName = !string.IsNullOrWhiteSpace(name)
+            ? StripHTML(name)
+            : "Mau" + connectionId.ToString().Split('-')[0];
+        
+        var connection = new ConnectionInstance(validatedName, connectionId, socket);
         if (IsEmpty()) Host = connection;
         Connections.Add(connection);
-        
+
         RoomType.OnConnect(connection);
         await HandleConnection(connection);
     }
@@ -38,27 +45,60 @@ public class Room
         while (!webSocketResponse.Result!.CloseStatus.HasValue)
         {
             var message = JsonSerializer.Deserialize<RoomMessage<string>>(webSocketResponse.SlicedBuffer);
-            if (message.Type == "CHAT")
+            switch (message.Type)
             {
-                var cleanedMessage = StripHTML(message.Data);
-                if (string.IsNullOrWhiteSpace(cleanedMessage)) cleanedMessage = "Mau!";
-                var chatMessage = new ChatMessage(connection.Name, cleanedMessage);
-                BroadCast(new RoomMessage<ChatMessage>("CHAT", chatMessage));
-            }
-            else
-            {
-                RoomType.OnMessage(connection, message);
+                case "CHAT":
+                    HandleChatMessage(connection, message.Data);
+                    break;
+                case "KICK":
+                    await HandleKick(Guid.Parse(message.Data));
+                    break;
+                default:
+                    RoomType.OnMessage(connection, message);
+                    break;
             }
 
             webSocketResponse = await WebsocketManager.ReceiveAsync(connection.Socket);
         }
+
         WebsocketManager.CloseAsync(connection.Socket, webSocketResponse.Result);
         HandleDisconnect(connection);
     }
 
+    private void HandleChatMessage(ConnectionInstance sender, string chatMessage)
+    {
+        // Remove HTML from chat message to prevent HTML injection
+        var cleanedMessage = StripHTML(chatMessage);
+
+        // If the message is empty, set it to "Mau!"
+        if (string.IsNullOrWhiteSpace(cleanedMessage)) cleanedMessage = "Mau!";
+
+        // Create a new chat message object with the sender and the message
+        var envelope = new ChatMessage(sender.Name, cleanedMessage);
+
+        // Broadcast the chat message to all connections in the room
+        BroadCast(new RoomMessage<ChatMessage>("CHAT", envelope));
+    }
+
+    private async Task HandleKick(Guid connectionId)
+    {
+        // Search for the connection with the given ID
+        var connection = Connections.FirstOrDefault(connection => connection.Id == connectionId);
+
+        // If the connection could not be found, return
+        if (connection == null) return;
+        
+        // Handle the disconnect of the connection
+        HandleDisconnect(connection);
+
+        // Close the connection with the reason "You have been kicked"
+        await connection.Socket.CloseAsync(WebSocketCloseStatus.NormalClosure, "You have been kicked",
+            CancellationToken.None);
+    }
+
     private void HandleDisconnect(ConnectionInstance connection)
     {
-        Connections.Remove(connection);        
+        Connections.Remove(connection);
         RoomType.OnDisconnect(connection);
         if (IsEmpty())
         {
@@ -84,7 +124,7 @@ public class Room
     {
         return Connections.Count == 0;
     }
-    
+
     private static string StripHTML(string input)
     {
         return Regex.Replace(input, "<.*?>", string.Empty);