refactor: added error message on creation or joining to room

Ragon/Sources/Lobby/Lobby.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using NetStack.Serialization;
 using NLog;
 using Ragon.Common;
@@ -13,12 +14,14 @@ public class Lobby : ILobby
   private readonly BitBuffer _buffer;
   private readonly RoomManager _roomManager;
   private readonly AuthorizationManager _authorizationManager;
+  private readonly IGameThread _gameThread;
 
   public AuthorizationManager AuthorizationManager => _authorizationManager;
 
   public Lobby(IAuthorizationProvider provider, RoomManager manager, IGameThread gameThread)
   {
     _roomManager = manager;
+    _gameThread = gameThread;
     _buffer = new BitBuffer();
     _serializer = new RagonSerializer();
     _authorizationManager = new AuthorizationManager(provider, gameThread, this, _serializer);
@@ -50,6 +53,17 @@ public class Lobby : ILobby
       case RagonOperation.JOIN_ROOM:
       {
         var roomId = _serializer.ReadString();
+        roomId = _serializer.ReadString();
+        var exists = _roomManager.Rooms.Any(r => r.Id == roomId);
+        if (!exists)
+        {
+          _serializer.Clear();
+          _serializer.WriteOperation(RagonOperation.JOIN_FAILED);
+          _serializer.WriteString($"Room with id {roomId} not exists");
+          var sendData = _serializer.ToArray();
+          _gameThread.Server.Send(peerId, sendData, DeliveryType.Reliable);
+          return;
+        }
 
         if (_roomManager.RoomsBySocket.ContainsKey(peerId))
           _roomManager.Left(player, Array.Empty<byte>());
@@ -62,7 +76,20 @@ public class Lobby : ILobby
         var roomId = Guid.NewGuid().ToString();
         var custom = _serializer.ReadBool();
         if (custom)
+        {
           roomId = _serializer.ReadString();
+          var exists = _roomManager.Rooms.Any(r => r.Id == roomId);
+          if (exists)
+          {
+            _serializer.Clear();
+            _serializer.WriteOperation(RagonOperation.JOIN_FAILED);
+            _serializer.WriteString($"Room with id {roomId} already exists");
+            
+            var sendData = _serializer.ToArray();
+            _gameThread.Server.Send(peerId, sendData, DeliveryType.Reliable);
+            return;
+          }
+        }
 
         var propertiesPayload = _serializer.ReadData(_serializer.Size);
         _buffer.Clear();

Ragon/Sources/Room/RoomManager.cs

@@ -11,12 +11,12 @@ public class RoomManager
   private readonly IGameThread _gameThread;
   private readonly PluginFactory _factory;
   private readonly Logger _logger = LogManager.GetCurrentClassLogger();
-  private readonly List<GameRoom> _rooms = new List<GameRoom>();
+  private readonly List<GameRoom> _rooms = new();
   private readonly Dictionary<uint, GameRoom> _roomsBySocket;
 
   public IReadOnlyDictionary<uint, GameRoom> RoomsBySocket => _roomsBySocket;
   public IReadOnlyList<GameRoom> Rooms => _rooms;
-
+  
   public RoomManager(PluginFactory factory, IGameThread gameThread)
   {
     _gameThread = gameThread;
@@ -83,7 +83,7 @@ public class RoomManager
       }
     }
 
-    _logger.Trace($"Player ({player.PlayerName}|{player.Id}) create room with Id {roomId} and params ({map}|{min}|{max})");
+    _logger.Trace($"Room not found for Player ({player.PlayerName}|{player.Id}), create room with Id {roomId} and params ({map}|{min}|{max})");
     
     var plugin = _factory.CreatePlugin(map);
     if (plugin == null)