Merge pull request #1 from MauMauStudios/mautiplayer

Basic (and First!) Multiplayer Mau Back-End

Controllers/MauController.cs

@@ -0,0 +1,21 @@
+using MauMau_Server.Mau;
+using Microsoft.AspNetCore.Mvc;
+
+namespace MauMau_Server.Controllers;
+
+[ApiController]
+[Route("[controller]")]
+public class DeckController : ControllerBase
+{
+    [HttpGet("deck")]
+    public IActionResult GetDeck()
+    {
+        return Ok(new Deck().GetUnusedDeck().Select(card => card.ToString()).ToList());
+    }
+    
+    [HttpGet("hand")]
+    public IActionResult GetHand()
+    {
+        return Ok(new Deck().DrawCards(8).Select(card => card.ToString()).ToList());
+    }
+}

Controllers/RoomController.cs

@@ -51,4 +51,11 @@ public class RoomController : ControllerBase
         var id = _roomManager.CreateRoom();
         return Ok(id);
     }
+
+    [HttpDelete]
+    public IActionResult Delete()
+    {
+        _roomManager.RemoveAllRooms();
+        return NoContent();
+    }
 }

Mau/Card.cs

@@ -0,0 +1,51 @@
+namespace MauMau_Server.Mau;
+
+public class Card
+{
+    public readonly CardType CardType;
+    public readonly CardValue CardValue;
+
+    public Card(CardType cardType, CardValue cardValue)
+    {
+        CardType = cardType;
+        CardValue = cardValue;
+    }
+
+    public override string ToString()
+    {
+        return $"{CardType} {CardValue}";
+    }
+
+    public Card parseCard(string card)
+    {
+        var cardType = card.Split(" ")[0];
+        var cardValue = card.Split(" ")[1];
+        return new Card((CardType)Enum.Parse(typeof(CardType), cardType),
+            (CardValue)Enum.Parse(typeof(CardValue), cardValue));
+    }
+}
+
+public enum CardType
+{
+    SPADES,
+    HEARTS,
+    DIAMONDS,
+    CLUBS
+}
+
+public enum CardValue
+{
+    TWO,
+    THREE,
+    FOUR,
+    FIVE,
+    SIX,
+    SEVEN,
+    EIGHT,
+    NINE,
+    TEN,
+    JACK,
+    QUEEN,
+    KING,
+    ACE
+}

Mau/CardDTO.cs

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

Mau/Deck.cs

@@ -0,0 +1,59 @@
+namespace MauMau_Server.Mau;
+
+public class Deck
+{
+    public List<Card> UnusedDeck = new();
+    public List<Card> UsedDeck = new();
+
+    public Deck()
+    {
+        foreach (CardType cardType in Enum.GetValues(typeof(CardType)))
+        {
+            foreach (CardValue cardValue in Enum.GetValues(typeof(CardValue)))
+            {
+                UnusedDeck.Add(new Card(cardType, cardValue));
+            }
+        }
+        ShuffleDeck();
+    }
+    
+    public List<Card> GetUnusedDeck()
+    {
+        return UnusedDeck;
+    }
+    
+    public Card DrawCard()
+    {
+        if (UnusedDeck.Count == 0) ReshuffleDeck();
+        var card = UnusedDeck[0];
+        UnusedDeck.RemoveAt(0);
+        return card;
+    }
+
+    public List<Card> DrawCards(int amount)
+    {
+        var cards = new List<Card>();
+        for (var i = 0; i < amount; i++)
+        {
+            cards.Add(DrawCard());
+        }
+        return cards;
+    }
+    
+    public void AddCardToUsedDeck(Card card)
+    {
+        UsedDeck.Add(card);
+    }
+
+    private void ReshuffleDeck()
+    {
+        UnusedDeck.AddRange(UsedDeck);
+        UsedDeck.Clear();
+        ShuffleDeck();
+    }
+
+    private void ShuffleDeck()
+    {
+        UnusedDeck = UnusedDeck.OrderBy(x => Guid.NewGuid()).ToList();
+    }
+}

Mau/Game.cs

@@ -0,0 +1,90 @@
+using System.Net.WebSockets;
+
+namespace MauMau_Server.Mau;
+
+public class Game
+{
+    public readonly Deck Deck = new();
+    public Card CurrentCard;
+    public List<Player> Players = new();
+    public Player CurrentPlayer;
+    public int TurnDirection = 1;
+
+    public Game()
+    {
+        CurrentCard = Deck.DrawCard();
+        Deck.AddCardToUsedDeck(CurrentCard);
+    }
+
+    public void AddPlayerToGame(string playerId, WebSocket socket)
+    {
+        var player = new Player("Koetje " + playerId.Split('-')[0], playerId, socket)
+        {
+            Hand = Deck.DrawCards(8)
+        };
+        Players.Add(player);
+        if (Players.Count == 1) CurrentPlayer = player;
+    }
+    
+    public void RemovePlayer(string playerId)
+    {
+        var player = GetPlayer(playerId);
+        Players.Remove(player);
+    }
+
+    public void PlayCard(string playerId, Card card)
+    {
+        var player = GetPlayer(playerId);
+        if (CurrentPlayer != player) return;
+        var hand = player.Hand;
+        if (!IsCardInHand(hand, card) || !IsCardPlayable(CurrentCard, card)) return;
+        Deck.AddCardToUsedDeck(card);
+        hand.Remove(GetSameCardFromHand(hand, card));
+        CurrentCard = card;
+        CurrentPlayer = GetNextPlayer();
+    }
+    
+    public Player GetNextPlayer()
+    {
+        var index = Players.IndexOf(CurrentPlayer);
+        index += TurnDirection;
+        if (index >= Players.Count) index = 0;
+        if (index < 0) index = Players.Count - 1;
+        return Players[index];
+    }
+    
+    public Player GetPlayer(string playerId)
+    {
+        return Players.FirstOrDefault(p => p.IsMe(playerId));
+    }
+
+    private static Card GetSameCardFromHand(IEnumerable<Card> hand, Card card)
+    {
+        return hand.FirstOrDefault(handCard => IsSameCard(handCard, card));
+    }
+
+    private static bool IsCardPlayable(Card currentCard, Card playedCard)
+    {
+        return IsSameCardType(currentCard, playedCard) || IsSameCardValue(currentCard, playedCard);
+    }
+
+    private static bool IsCardInHand(IEnumerable<Card> hand, Card card)
+    {
+        return hand.Any(handCard => IsSameCard(handCard, card));
+    }
+
+    private static bool IsSameCard(Card card1, Card card2)
+    {
+        return IsSameCardType(card1, card2) && IsSameCardValue(card1, card2);
+    }
+
+    private static bool IsSameCardType(Card card1, Card card2)
+    {
+        return card1.CardType == card2.CardType;
+    }
+
+    private static bool IsSameCardValue(Card card1, Card card2)
+    {
+        return card1.CardValue == card2.CardValue;
+    }
+}

Mau/GameState.cs

@@ -0,0 +1,28 @@
+namespace MauMau_Server.Mau;
+
+public class GameState
+{
+    public string PlayerName { get; set; }
+    public List<string> Hand { get; set; } = new();
+    public string CurrentCard { get; set; }
+    public string CurrentPlayer { get; set; }
+    public List<string> Players { get; set; } = new();
+
+    public GameState(Game game, string playerId)
+    {
+        var p = game.GetPlayer(playerId);
+        PlayerName = p.Name;
+        foreach (var card in p.Hand)
+        {
+            Hand.Add(card.ToString());
+        }
+        
+        foreach (var player in game.Players)
+        {
+            Players.Add(player.Name);
+        }
+        
+        CurrentCard = game.CurrentCard.ToString();
+        CurrentPlayer = game.CurrentPlayer.Name;
+    }
+}

Mau/Player.cs

@@ -0,0 +1,20 @@
+using System.Net.WebSockets;
+
+namespace MauMau_Server.Mau;
+
+public class Player
+{
+    public string Name { get; set; }
+    public string PlayerId { get; set; }
+    public WebSocket Socket { get; set; }
+    public List<Card> Hand { get; set; } = new();
+    
+    public Player(string name, string playerId, WebSocket socket)
+    {
+        Name = name;
+        PlayerId = playerId;
+        Socket = socket;
+    }
+    
+    public bool IsMe(string playerId) => PlayerId == playerId;
+}

Websockets/Room.cs

@@ -1,11 +1,14 @@
 using System.Net.WebSockets;
 using System.Text;
+using System.Text.Json;
+using MauMau_Server.Mau;
 
 namespace MauMau_Server.Websockets;
 
 public class Room
 {
     private readonly Dictionary<string, WebSocket> _connections = new();
+    private readonly Game _game = new();
 
     public async Task InstantiateConnection(WebSocket socket)
     {
@@ -15,23 +18,28 @@ public class Room
 
     private async Task HandleConnection(WebSocket socket, string socketId)
     {
+        BroadcastGameState();
         var buffer = EmptyBuffer();
         var result = await ReceiveAsync(socket, buffer);
         while (!result.CloseStatus.HasValue)
         {
-            var message = $"{socketId}: {Encoding.Default.GetString(buffer)}";
-            BroadcastAsync(message);
+            var slicedBuffer = buffer[0..result.Count];
+            var playedCard = JsonSerializer.Deserialize<CardDTO>(slicedBuffer).ToCard();
+            _game.PlayCard(socketId, playedCard);
+            BroadcastGameState();
             buffer = EmptyBuffer();
             result = await ReceiveAsync(socket, buffer);
         }
         await socket.CloseAsync(result.CloseStatus.Value, result.CloseStatusDescription, CancellationToken.None);
         RemoveConnection(socketId);
+        _game.RemovePlayer(socketId);
     }
 
     private string AddConnection(WebSocket socket)
     {
         var socketId = Guid.NewGuid().ToString();
         _connections.Add(socketId, socket);
+        _game.AddPlayerToGame(socketId, socket);
         return socketId;
     }
     
@@ -57,14 +65,29 @@ public class Room
         return result;
     }
     
+    private void BroadcastGameState()
+    {
+        foreach (var (id, socket) in GetAllConnections())
+        {
+            var gameState = new GameState(_game, id);
+            var message = JsonSerializer.Serialize(gameState);
+            SendAsync(socket, message);
+        }
+    }
+    
     private void BroadcastAsync(string message)
+    {
+        foreach (var (id, socket) in GetAllConnections())
+        {
+            SendAsync(socket, message);
+        }
+    }
+    
+    private void SendAsync(WebSocket socket, string message)
     {
         var bytes = Encoding.Default.GetBytes(message);
         var arraySegment = new ArraySegment<byte>(bytes);
-        foreach (var (id, socket) in GetAllConnections())
-        {
-            socket.SendAsync(arraySegment, WebSocketMessageType.Text, true, CancellationToken.None);
-        }
+        socket.SendAsync(arraySegment, WebSocketMessageType.Text, true, CancellationToken.None);
     }
 
     private static byte[] EmptyBuffer()

Websockets/RoomManager.cs

@@ -31,6 +31,11 @@ public class RoomManager : IRoomManager
     {
         return Rooms.ContainsKey(roomId);
     }
+    
+    public void RemoveAllRooms()
+    {
+        Rooms.Clear();
+    }
 }
 
 public interface IRoomManager
@@ -40,4 +45,5 @@ public interface IRoomManager
     public List<string> GetAllRooms();
     public void RemoveRoom(string roomId);
     public bool RoomExists(string roomId);
+    public void RemoveAllRooms();
 }

mau.json

@@ -0,0 +1 @@
+{"CardType":"SPADES","CardValue":"THREE"}