Not force closing all rooms may be a good idea

Controllers/RoomController.cs

@@ -1,4 +1,5 @@
-using MauMau_Server.Websockets;
+using System.Text.Json;
+using MauMau_Server.Websockets;
 using Microsoft.AspNetCore.Mvc;
 
 namespace MauMau_Server.Controllers;
@@ -49,7 +50,7 @@ public class RoomController : ControllerBase
     public IActionResult Post()
     {
         var id = _roomManager.CreateRoom();
-        return Ok(id);
+        return Ok(JsonSerializer.Serialize(id));
     }
 
     [HttpDelete]

Mau/Game.cs

@@ -33,7 +33,7 @@ public class Game
         Players.Remove(player);
     }
 
-    public void handleAction(string playerId, ActionDTO action)
+    public void HandleAction(string playerId, ActionDTO action)
     {
         var player = GetPlayer(playerId);
         if (CurrentPlayer != player) return;
@@ -49,7 +49,6 @@ public class Game
                 DrawCard(player);
                 break;
         }
-        
     }
 
     private void PlayCard(Player player, Card card)
@@ -59,7 +58,46 @@ public class Game
         Deck.AddCardToUsedDeck(card);
         hand.Remove(GetSameCardFromHand(hand, card));
         CurrentCard = card;
+        HandleNextPlayer(card);
+    }
+
+    private void HandleNextPlayer(Card card)
+    {
+        switch (card.CardValue)
+        {
+            case CardValue.TWO:
+            {
+                var nextPlayer = GetNextPlayer();
+                var cardsToDraw = Deck.DrawCards(2);
+                foreach (var drawnCard in cardsToDraw)
+                {
+                    nextPlayer.Hand.Add(drawnCard);
+                }
+                CurrentPlayer = GetNextPlayer(2);
+                break;
+            }
+            case CardValue.SEVEN:
+            case CardValue.KING:
+                break;
+            case CardValue.EIGHT:
+                CurrentPlayer = GetNextPlayer(2);
+                break;
+            case CardValue.ACE:
+                TurnDirection *= -1;
                 CurrentPlayer = GetNextPlayer();
+                break;
+            case CardValue.THREE:
+            case CardValue.FOUR:
+            case CardValue.FIVE:
+            case CardValue.SIX:
+            case CardValue.NINE:
+            case CardValue.TEN:
+            case CardValue.JACK:
+            case CardValue.QUEEN:
+            default:
+                CurrentPlayer = GetNextPlayer();
+                break;
+        }
     }
 
     private void DrawCard(Player player)
@@ -68,12 +106,16 @@ public class Game
         CurrentPlayer = GetNextPlayer();
     }
 
-    private Player GetNextPlayer()
+    private Player GetNextPlayer(int numberOfPlayers = 1)
     {
         var index = Players.IndexOf(CurrentPlayer);
+        for (var i = 0; i < numberOfPlayers; i++)
+        {
             index += TurnDirection;
             if (index >= Players.Count) index = 0;
             if (index < 0) index = Players.Count - 1;
+        }
+
         return Players[index];
     }
 

Websockets/Room.cs

@@ -25,7 +25,7 @@ public class Room
         {
             var slicedBuffer = buffer[0..result.Count];
             var action = JsonSerializer.Deserialize<ActionDTO>(slicedBuffer);
-            _game.handleAction(socketId, action);
+            _game.HandleAction(socketId, action);
             BroadcastGameState();
             buffer = EmptyBuffer();
             result = await ReceiveAsync(socket, buffer);
@@ -58,7 +58,7 @@ public class Room
         _connections.Remove(socketId);
     }
     
-    private async Task<WebSocketReceiveResult?> ReceiveAsync(WebSocket webSocket, byte[] buffer)
+    private static async Task<WebSocketReceiveResult?> ReceiveAsync(WebSocket webSocket, byte[] buffer)
     {
         var arraySegment = new ArraySegment<byte>(buffer);
         var result = await webSocket.ReceiveAsync(arraySegment, CancellationToken.None);
@@ -83,7 +83,7 @@ public class Room
         }
     }
     
-    private void SendAsync(WebSocket socket, string message)
+    private static void SendAsync(WebSocket socket, string message)
     {
         var bytes = Encoding.Default.GetBytes(message);
         var arraySegment = new ArraySegment<byte>(bytes);
@@ -94,4 +94,9 @@ public class Room
     {
         return new byte[4096];
     }
+    
+    public bool IsEmpty()
+    {
+        return _connections.Count == 0;
+    }
 }

Websockets/RoomManager.cs

@@ -34,7 +34,10 @@ public class RoomManager : IRoomManager
     
     public void RemoveAllRooms()
     {
-        Rooms.Clear();
+        foreach (var room in Rooms.Where(room => room.Value.IsEmpty()))
+        {
+            Rooms.Remove(room.Key);
+        }
     }
 }