Partial rewrite, missing:

- Correctly parsing incoming messages
- Sending the gamestate after relevant actions

Mau/GameMessages/ChooseCard.cs

@@ -0,0 +1,6 @@
+namespace MauMau_Server.Mau.GameMessages;
+
+public class ChooseCard
+{
+    
+}

Mau/GameMessages/GameMessage.cs

@@ -0,0 +1,14 @@
+namespace MauMau_Server.Mau.GameMessages;
+
+public class GameMessage
+{
+    public GameIntent Intent { get; set; }
+    public string Data { get; set; }
+}
+
+public enum GameIntent
+{
+    CHOOSE,
+    DRAW,
+    PLAY,
+}

Mau/GameMessages/PlayCard.cs

@@ -0,0 +1,30 @@
+namespace MauMau_Server.Mau.GameMessages;
+
+public class PlayCard
+{
+    public string CardType { get; set; }
+    public string CardValue { get; set; }
+    
+    public PlayCard(Card card)
+    {
+        CardType = card.CardType.ToString();
+        CardValue = card.CardValue.ToString();
+    }
+    
+    public PlayCard(string cardType, string cardValue)
+    {
+        CardType = cardType;
+        CardValue = cardValue;
+    }
+    
+    public PlayCard()
+    {
+        
+    }
+    
+    public Card ToCard()
+    {
+        return new Card((CardType)Enum.Parse(typeof(CardType), CardType),
+            (CardValue)Enum.Parse(typeof(CardValue), CardValue));
+    }
+}