[ADDITION] added a new property to the user (may be removed later on), and made a check for the random word

[FIX] Callbacks weren't properly called

Client/Client.cs

@@ -2,30 +2,54 @@
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.IO;
 using System.Net.Sockets;
 using System.Text;
+using System.Windows.Media;
+using System.Windows;
+
 using static SharedClientServer.JSONConvert;
 
 namespace Client
 {
+    public delegate void LobbyJoinCallback(bool isHost);
+
+    public delegate void RandomWord(string word);
+    public delegate void HandleIncomingMsg(string username, string msg);
+    internal delegate void HandleIncomingPlayer(Lobby lobby);
+    public delegate void CanvasDataReceived(double[][] coordinates, Color color);
+    public delegate void CanvasReset();
     public delegate void LobbyCallback(int id);
+
+
     class Client : ObservableObject
     {
+
+        private ClientData clientData = ClientData.Instance;
+
         private TcpClient tcpClient;
         private NetworkStream stream;
-        private byte[] buffer = new byte[1024];
+        private byte[] buffer = new byte[2048];
-        private byte[] totalBuffer = new byte[1024];
+        private byte[] totalBuffer = new byte[2048];
         private int totalBufferReceived = 0;
         public int Port = 5555;
         public bool Connected = false;
         private string username;
         public Callback OnSuccessfullConnect;
         public Callback OnLobbiesListReceived;
-        public Callback OnLobbyJoinSuccess;
+        public LobbyJoinCallback OnLobbyJoinSuccess;
         public Callback OnLobbiesReceivedAndWaitingForHost;
+        public Callback OnServerDisconnect;
+        public Callback OnLobbyUpdate;
         public LobbyCallback OnLobbyCreated;
         public LobbyCallback OnLobbyLeave;
+        public RandomWord RandomWord;
+        public HandleIncomingMsg IncomingMsg;
+        public HandleIncomingPlayer IncomingPlayer;
         private ClientData data = ClientData.Instance;
+        public CanvasDataReceived CanvasDataReceived;
+        public CanvasReset CReset;
+        public HandleIncomingPlayer UpdateUserScores;
         public Lobby[] Lobbies { get; set; }
 
         public Client(string username)
@@ -39,41 +63,63 @@ namespace Client
         private void OnConnect(IAsyncResult ar)
         {
             Debug.Write("finished connecting to server");
-            this.tcpClient.EndConnect(ar);
+            try
-            this.stream = tcpClient.GetStream();
+            {
-            OnSuccessfullConnect?.Invoke();
+                this.tcpClient.EndConnect(ar);
-            SendMessage(JSONConvert.ConstructUsernameMessage(username));
+                this.stream = tcpClient.GetStream();
-            this.stream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(OnReadComplete),null);
+                OnSuccessfullConnect?.Invoke();
+                OnLobbyUpdate = updateGameLobby;
+                SendMessage(JSONConvert.ConstructUsernameMessage(username));
+                this.stream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(OnReadComplete), null);
+
+            }
+            catch (Exception e)
+            {
+                Debug.WriteLine("Can't connect, retrying...");
+                tcpClient.BeginConnect("localhost", Port, new AsyncCallback(OnConnect), null);
+            }
         }
 
         private void OnReadComplete(IAsyncResult ar)
         {
-            int amountReceived = stream.EndRead(ar);
 
-            if (totalBufferReceived + amountReceived > 1024)
+            if (ar == null || (!ar.IsCompleted) || (!this.stream.CanRead) || !this.tcpClient.Client.Connected)
+                return;
+
+            try
             {
-                throw new OutOfMemoryException("buffer too small");
+                int amountReceived = stream.EndRead(ar);
+
+                if (totalBufferReceived + amountReceived > 2048)
+                {
+                    throw new OutOfMemoryException("buffer too small");
+                }
+
+                Array.Copy(buffer, 0, totalBuffer, totalBufferReceived, amountReceived);
+                totalBufferReceived += amountReceived;
+
+                int expectedMessageLength = BitConverter.ToInt32(totalBuffer, 0);
+
+                while (totalBufferReceived >= expectedMessageLength)
+                {
+                    // we have received the complete packet
+                    byte[] message = new byte[expectedMessageLength];
+                    // put the message received into the message array
+                    Array.Copy(totalBuffer, 0, message, 0, expectedMessageLength);
+                    handleData(message);
+
+                    totalBufferReceived -= expectedMessageLength;
+                    expectedMessageLength = BitConverter.ToInt32(totalBuffer, 0);
+                }
+
+                ar.AsyncWaitHandle.WaitOne();
+                stream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(OnReadComplete), null);
             }
-
+            catch (IOException e)
-            Array.Copy(buffer, 0, totalBuffer, totalBufferReceived, amountReceived);
-            totalBufferReceived += amountReceived;
-
-            int expectedMessageLength = BitConverter.ToInt32(totalBuffer, 0);
-
-            while (totalBufferReceived >= expectedMessageLength)
             {
-                // we have received the complete packet
+                Debug.WriteLine("[CLIENT] server not responding! got error: " + e.Message);
-                byte[] message = new byte[expectedMessageLength];
+                OnServerDisconnect?.Invoke();
-                // put the message received into the message array
-                Array.Copy(totalBuffer, 0, message, 0, expectedMessageLength);
-
-                handleData(message);
-
-                totalBufferReceived -= expectedMessageLength;
-                expectedMessageLength = BitConverter.ToInt32(totalBuffer, 0);
             }
-
-            stream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(OnReadComplete), null);
         }
 
         private void handleData(byte[] message)
@@ -95,9 +141,14 @@ namespace Client
                     string textUsername = combo.Item1;
                     string textMsg = combo.Item2;
 
-                    if(textUsername != data.User.Username)
+                    if (textUsername != data.User.Username)
                     {
-                        ViewModels.ViewModelGame.HandleIncomingMsg(textUsername, textMsg);
+                        IncomingMsg?.Invoke(textUsername, textMsg);
+                    }
+
+                    if (textMsg == data.User.RandomWord && !string.IsNullOrEmpty(data.User.RandomWord))
+                    {
+                        Debug.WriteLine($"[CLIENT] word has been guessed! {data.User.Username} + Word: {data.User.RandomWord}");
                     }
 
                     //TODO display username and message in chat window
@@ -115,6 +166,7 @@ namespace Client
                             Lobbies = JSONConvert.GetLobbiesFromMessage(payload);
                             OnLobbiesListReceived?.Invoke();
                             OnLobbiesReceivedAndWaitingForHost?.Invoke();
+                            OnLobbyUpdate?.Invoke();
                             break;
                         case LobbyIdentifier.HOST:
                             // we receive this when the server has made us a host of a new lobby
@@ -124,7 +176,7 @@ namespace Client
                             OnLobbyCreated?.Invoke(lobbyCreatedID);
                             break;
                         case LobbyIdentifier.JOIN_SUCCESS:
-                            OnLobbyJoinSuccess?.Invoke();
+                            OnLobbyJoinSuccess?.Invoke(JSONConvert.GetLobbyJoinIsHost(payload));
                             break;
                         case LobbyIdentifier.LEAVE:
                             int lobbyLeaveID = JSONConvert.GetLobbyID(payload);
@@ -136,15 +188,56 @@ namespace Client
 
                 case JSONConvert.CANVAS:
                     // canvas data
+                    //clientData.CanvasData = JSONConvert.getCoordinates(payload);         
+                    int type = JSONConvert.GetCanvasMessageType(payload);
+                    switch (type)
+                    {
+                        case JSONConvert.CANVAS_RESET:
+                            CReset?.Invoke();
+                            break;
+
+                        case JSONConvert.CANVAS_WRITING:
+                            CanvasDataReceived?.Invoke(JSONConvert.getCoordinates(payload), JSONConvert.getCanvasDrawingColor(payload));
+                            break;
+                    }
+                    break;
+
+                case JSONConvert.RANDOMWORD:
+                    //Flag byte for receiving the random word.
+                    int lobbyId = JSONConvert.GetLobbyID(payload);
+                    data.User.RandomWord = JSONConvert.GetRandomWord(payload);
+                    data.User.TurnToDraw = true; // Dit is test code, dit kan weg zodra alles lopende is.
+                    if (data.Lobby?.ID == lobbyId && data.User.TurnToDraw)
+                        RandomWord?.Invoke(data.User.RandomWord);
                     break;
 
                 default:
                     Debug.WriteLine("[CLIENT] Received weird identifier: " + id);
                     break;
             }
+            SendMessage(JSONConvert.GetMessageToSend(JSONConvert.MESSAGE_RECEIVED, null));
 
         }
 
+        /*
+         * Updates the current lobby with the joining players, 
+         * their player score is also tracked and should always be zero.
+         */
+        private void updateGameLobby()
+        {
+            Debug.WriteLine("[CLIENT] updating game lobby");
+            foreach (var item in Lobbies)
+            {
+                Debug.WriteLine("[CLIENT] lobby data: {0}", item.Users.Count);
+                if (item.ID == data.Lobby?.ID)
+                {
+                    //IncomingPlayer?.Invoke(item);
+                    UpdateUserScores?.Invoke(item as Lobby);
+                }
+
+            }
+        }
+
         public void SendMessage(byte[] message)
         {
             Debug.WriteLine("[CLIENT] sending message " + Encoding.ASCII.GetString(message));
@@ -155,6 +248,7 @@ namespace Client
         {
             Debug.WriteLine("[CLIENT] finished writing");
             stream.EndWrite(ar);
+            stream.Flush();
         }
     }
 }

Client/ClientData.cs

@@ -31,6 +31,7 @@ namespace Client
         private Client _client;
         private Lobby _lobby;
         private string _message;
+        private double[] _canvasData = new double[4];
 
         private ClientData()
         {
@@ -68,5 +69,11 @@ namespace Client
             }
         }
 
+        public double[] CanvasData
+        {
+            get { return _canvasData; }
+            set { _canvasData = value; }
+        }
+
     }
 }

Client/ViewModels/ViewModel.cs

@@ -11,6 +11,9 @@ using System.Collections.ObjectModel;
 using Client.Views;
 using System.Linq;
 using System.Windows.Data;
+using System.Data;
+using System.Windows.Controls.Primitives;
+using System.Windows.Controls;
 
 namespace Client
 {
@@ -35,6 +38,10 @@ namespace Client
             client = ClientData.Instance.Client;
             client.OnLobbiesListReceived = updateLobbies;
             client.OnLobbyLeave = leaveLobby;
+            client.OnServerDisconnect = () =>
+            {
+                Environment.Exit(0);
+            };
             
 
             OnHostButtonClick = new RelayCommand(hostGame);
@@ -54,16 +61,16 @@ namespace Client
             Debug.WriteLine("attempting to host game for " + ClientData.Instance.User.Username);
             client.SendMessage(JSONConvert.ConstructLobbyHostMessage());
             client.OnLobbyCreated = becomeHostForLobby;
+
         }
 
         private void becomeHostForLobby(int id)
         {
-            
             Debug.WriteLine($"got host succes with data {id} ");
             wantToBeHost = true;
             wantToBeHostId = id;
+            ClientData.Instance.User.Host = true;
             client.OnLobbiesReceivedAndWaitingForHost = hostLobbiesReceived;
-
         }
 
         private void hostLobbiesReceived()
@@ -85,14 +92,21 @@ namespace Client
 
         private void joinLobby()
         {
-            // lobby die je wilt joinen verwijderen
+            if (SelectedLobby != null)
-            // nieuwe binnengekregen lobby toevoegen
+            {
-            client.OnLobbyJoinSuccess = OnLobbyJoinSuccess;
+                if (SelectedLobby.PlayersIn == SelectedLobby.MaxPlayers || !SelectedLobby.LobbyJoinable)
-            client.SendMessage(JSONConvert.ConstructLobbyJoinMessage(SelectedLobby.ID));
+                {
+                    return;
+                }
+                client.OnLobbyJoinSuccess = OnLobbyJoinSuccess;
+                client.SendMessage(JSONConvert.ConstructLobbyJoinMessage(SelectedLobby.ID));
+            }
+            
         }
 
-        private void OnLobbyJoinSuccess()
+        private void OnLobbyJoinSuccess(bool isHost)
         {
+            ClientData.Instance.User.Host = isHost;
             startGameInLobby();
         }
 
@@ -100,7 +114,7 @@ namespace Client
 
         private void updateLobbies()
         {
-            Debug.WriteLine("updating lobbies...");
+            Debug.WriteLine("[VIEWMODEL] updating lobbies...");
             Lobby[] lobbiesArr = client.Lobbies;
             Application.Current.Dispatcher.Invoke(delegate
             {
@@ -110,6 +124,11 @@ namespace Client
                 foreach (Lobby l in lobbiesArr)
                 {
                     _lobbies.Add(l);
+                    Lobby clientLobby = ClientData.Instance.Lobby;
+                    if (l.ID == clientLobby?.ID)
+                    {
+                        clientLobby = l;
+                    }
                 }
 
             });
@@ -163,5 +182,7 @@ namespace Client
             get { return _lobbies; }
             set { _lobbies = value; }
         }
+
+   
     }
 }

Client/ViewModels/ViewModelGame.cs

@@ -1,140 +1,271 @@
-
+using Client.Views;
-using Client.Views;
+using GalaSoft.MvvmLight.Command;
-using GalaSoft.MvvmLight.Command;
+using SharedClientServer;
-using SharedClientServer;
+using System;
-using System.Collections.ObjectModel;
+using System.Collections.Generic;
-using System.ComponentModel;
+using System.Collections.ObjectModel;
-using System.Diagnostics;
+using System.ComponentModel;
-using System.Windows;
+using System.Diagnostics;
-using System.Windows.Input;
+using System.Timers;
-using System.Windows.Media;
+using System.Windows;
-using System.Windows.Shapes;
+using System.Windows.Input;
-
+using System.Windows.Media;
-namespace Client.ViewModels
+using System.Windows.Shapes;
-{
+
-    class ViewModelGame : INotifyPropertyChanged
+namespace Client.ViewModels
-    {
+{
-        private ClientData data = ClientData.Instance;
+    class ViewModelGame : INotifyPropertyChanged
-
+    {
-        public event PropertyChangedEventHandler PropertyChanged;
+        public event PropertyChangedEventHandler PropertyChanged;
-
+        private ClientData data = ClientData.Instance;
-        private Point currentPoint = new Point();
+        private GameWindow window;
-        private Color color;
+        private Point currentPoint = new Point();
-
+        public Color color;
-        public static ObservableCollection<string> Messages { get; } = new ObservableCollection<string>();
+        public double[][] buffer;
-
+        public int pos = 0;
-        private dynamic _payload;
+        public int maxLines = 50;
-
+        public Queue<double[][]> linesQueue;
-        public string _username;
+        private Timer queueTimer;
-
+
-        public string _message;
+        public static ObservableCollection<string> Messages { get; } = new ObservableCollection<string>();
-        public string Message
+        public ObservableCollection<string> Players { get; } = new ObservableCollection<string>();
-        {
+
-            get
+        private dynamic _payload;
-            {
+
-                return _message;
+        public string _username;
-            }
+
-            set
+        public string _message;
-            {
+        public string Message
-                _message = value;
+        {
-            }
+            get
-        }
+            {
-        public ICommand OnKeyDown { get; set; }
+                return _message;
-
+            }
-        public void Canvas_MouseDown(MouseButtonEventArgs e, GameWindow window)
+            set
-        {
+            {
-            if (e.ButtonState == MouseButtonState.Pressed)
+                _message = value;
-            {
+            }
-                currentPoint = e.GetPosition(window.CanvasForPaint);
+        }
-            }
+
-        }
+        private string _randomWord;
-
+        public string RandomWord
-        public void Canvas_MouseMove(MouseEventArgs e, GameWindow window)
+        {
-        {
+            get { return _randomWord; }
-            if (e.LeftButton == MouseButtonState.Pressed)
+            set { _randomWord = value; }
-            {
+        }
-                double[] coordinates = new double[4];
+
-                Line line = new Line();
+        public bool IsHost
-
+        {
-                line.Stroke = new SolidColorBrush(color);
+            get { return data.User.Host; }
-                //line.Stroke = SystemColors.WindowFrameBrush;
+        }
-                line.X1 = currentPoint.X;
+
-                line.Y1 = currentPoint.Y;
+        public ViewModelGame(GameWindow window)
-                line.X2 = e.GetPosition(window.CanvasForPaint).X;
+        {
-                line.Y2 = e.GetPosition(window.CanvasForPaint).Y;
+            this.window = window;
-                coordinates[0] = line.X1;
+
-                coordinates[1] = line.Y1;
+            buffer = new double[maxLines][];
-                coordinates[2] = line.X2;
+            linesQueue = new Queue<double[][]>();
-                coordinates[3] = line.Y2;
+            OnKeyDown = new RelayCommand(ChatBox_KeyDown);
-                currentPoint = e.GetPosition(window.CanvasForPaint);
+            ButtonStartGame = new RelayCommand(BeginGame);
-
+            ButtonResetCanvas = new RelayCommand(CanvasResetLocal);
-                window.CanvasForPaint.Children.Add(line);
+            data.Client.CanvasDataReceived = UpdateCanvasWithNewData;
-                data.Client.SendMessage(JSONConvert.GetMessageToSend(0x04, coordinates));
+            data.Client.CReset = CanvasResetData;
-            }
+            data.Client.RandomWord = HandleRandomWord;
-        }
+            data.Client.IncomingMsg = HandleIncomingMsg;
-
+            data.Client.IncomingPlayer = HandleIncomingPlayer;
-        public void Color_Picker(RoutedPropertyChangedEventArgs<Color?> e, GameWindow window)
+            data.Client.UpdateUserScores = UpdateUserScores;
-        {
+        }
-            Color colorSelected = new Color();
+
-            colorSelected.A = 255;
+        public ICommand OnKeyDown { get; set; }
-            colorSelected.R = window.ClrPcker_Background.SelectedColor.Value.R;
+        public ICommand ButtonStartGame { get; set; }
-            colorSelected.G = window.ClrPcker_Background.SelectedColor.Value.G;
+        public ICommand ButtonResetCanvas { get; set; }
-            colorSelected.B = window.ClrPcker_Background.SelectedColor.Value.B;
+       
-            color = colorSelected;
+        public void BeginGame()
-        }
+        {
-        
+            
-
+            queueTimer = new Timer(50);
-        public ViewModelGame()
+            queueTimer.Start();
-        {
+            queueTimer.Elapsed += sendArrayFromQueue;
-            if (_payload == null)
+            data.Client.SendMessage(JSONConvert.ConstructGameStartData(data.Lobby.ID));
-            {
+        }
-                _message = "";
+
-
+
-            }
+        private void CanvasResetLocal()
-            else
+        {
-            {
+            this.window.CanvasForPaint.Children.Clear();
-                //_message = data.Message;
+            data.Client.SendMessage(JSONConvert.GetMessageToSend(JSONConvert.CANVAS, JSONConvert.CANVAS_RESET));
-                //_username = data.User.Username;
+        }
-                //Messages.Add($"{data.User.Username}: {Message}");
+
-            }
+
-            OnKeyDown = new RelayCommand(ChatBox_KeyDown);
+        public void Canvas_MouseDown(MouseButtonEventArgs e, GameWindow window)
-        }
+        {
-
+            if (e.ButtonState == MouseButtonState.Pressed)
-        private void ChatBox_KeyDown()
+            {
-        {
+                currentPoint = e.GetPosition(window.CanvasForPaint);
-            //if enter then clear textbox and send message.
+            }
-            if (Message != string.Empty) AddMessage(Message);
+        }
-            Message = string.Empty;
+
-        }
+        public void Canvas_MouseMove(MouseEventArgs e, GameWindow window)
-
+        {
-        internal void AddMessage(string message)
+            if (e.LeftButton == MouseButtonState.Pressed)
-        {
+            {
-            Messages.Add($"{data.User.Username}: {message}");
+                double[] coordinates = new double[4];
-
+                Line line = new Line();
-            _payload = new
+
-            {
+                line.Stroke = new SolidColorBrush(color);
-                username = data.User.Username,
+                //line.Stroke = SystemColors.WindowFrameBrush;
-                message = message
+                line.X1 = currentPoint.X;
-            };
+                line.Y1 = currentPoint.Y;
-
+                line.X2 = e.GetPosition(window.CanvasForPaint).X;
-            //Broadcast the message after adding it to the list!
+                line.Y2 = e.GetPosition(window.CanvasForPaint).Y;
-            data.Client.SendMessage(JSONConvert.GetMessageToSend(JSONConvert.MESSAGE, _payload));
+                coordinates[0] = line.X1;
-        }
+                coordinates[1] = line.Y1;
-
+                coordinates[2] = line.X2;
-        public static void HandleIncomingMsg(string username, string message)
+                coordinates[3] = line.Y2;
-        {
+                currentPoint = e.GetPosition(window.CanvasForPaint);
-            Application.Current.Dispatcher.Invoke(delegate
+                buffer[pos] = coordinates;
-            {
+                pos++;
-                Messages.Add($"{username}: {message}");
+
-            });
+                window.CanvasForPaint.Children.Add(line);
-        }
+                if (pos == maxLines)
-        public void LeaveGame(object sender, System.ComponentModel.CancelEventArgs e)
+                {
-        {
+                    double[][] temp = new double[maxLines][];
-            Debug.WriteLine("Leaving...");
+                    for (int i = 0; i < maxLines; i++)
-            data.Client.SendMessage(JSONConvert.ConstructLobbyLeaveMessage(data.Lobby.ID));
+                    {
-        }
+                        temp[i] = buffer[i];
-
+                    }
-
+                    linesQueue.Enqueue(temp);
-    }
+                    Array.Clear(buffer, 0, buffer.Length);
-}
+                    pos = 0;
-       
+                }
+                
+            }
+        }
+
+        public void Canvas_MouseUp(object sender, MouseButtonEventArgs e)
+        {
+            sendArrayFromQueue(sender, null);
+        }
+
+        private void sendArrayFromQueue(object sender, ElapsedEventArgs e)
+        {
+            
+            if (linesQueue.Count != 0)
+            {
+                double[][] temp = linesQueue.Dequeue();
+                data.Client.SendMessage(JSONConvert.ConstructDrawingCanvasData(temp,color));
+            }
+        }
+
+        public void Color_Picker(RoutedPropertyChangedEventArgs<Color?> e, GameWindow window)
+        {
+            Color colorSelected = new Color();
+            colorSelected.A = 255;
+            colorSelected.R = window.ClrPcker_Background.SelectedColor.Value.R;
+            colorSelected.G = window.ClrPcker_Background.SelectedColor.Value.G;
+            colorSelected.B = window.ClrPcker_Background.SelectedColor.Value.B;
+            color = colorSelected;
+        }
+
+        private void UpdateCanvasWithNewData(double[][] buffer, Color color)
+        {
+            Application.Current.Dispatcher.Invoke(delegate
+            {
+                foreach (double[] arr in buffer)
+                {
+                    Line line = new Line();
+                    line.Stroke = new SolidColorBrush(color);
+                    line.X1 = arr[0];
+                    line.Y1 = arr[1];
+                    line.X2 = arr[2];
+                    line.Y2 = arr[3];
+                    this.window.CanvasForPaint.Children.Add(line);
+                }
+            });
+        }
+
+        private void CanvasResetData()
+        {
+            this.window.CanvasForPaint.Children.Clear();
+        }
+
+        private void ChatBox_KeyDown()
+        {
+            //if enter then clear textbox and send message.
+            if (Message != string.Empty) AddMessage(Message);
+            Message = string.Empty;
+        }
+
+        internal void AddMessage(string message)
+        {
+            Messages.Add($"{data.User.Username}: {message}");
+
+            _payload = new
+            {
+                username = data.User.Username,
+                message = message
+            };
+
+            //Broadcast the message after adding it to the list!
+            data.Client.SendMessage(JSONConvert.GetMessageToSend(JSONConvert.MESSAGE, _payload));
+        }
+
+        public void HandleIncomingMsg(string username, string message)
+        {
+            Application.Current.Dispatcher.Invoke(delegate
+            {
+                Messages.Add($"{username}: {message}");
+            });
+        }
+        public void LeaveGame(object sender, System.ComponentModel.CancelEventArgs e)
+        {
+            Debug.WriteLine("Leaving...");
+            data.Client.SendMessage(JSONConvert.ConstructLobbyLeaveMessage(data.Lobby.ID));
+        }
+
+        public void HandleRandomWord(string randomWord)
+        {
+            Debug.WriteLine("[CLIENT] Reached the handle random word method!");
+            Application.Current.Dispatcher.Invoke(delegate
+            {
+                RandomWord = randomWord;
+            });
+        }
+        public void HandleIncomingPlayer(Lobby lobby)
+        {
+            Application.Current.Dispatcher.Invoke(delegate
+            {
+                Players.Clear();
+                foreach (var item in lobby.Users)
+                {
+                    Players.Add(item.Username + "\n" + item.Score);
+                }
+            });
+        }
+
+        private void UpdateUserScores(Lobby newLobby) {
+            Debug.WriteLine("[GAME] updating user scores");
+            List<User> newUsers = newLobby.Users;
+            // go over all users in current lobby
+            foreach (User user in data.Lobby?.Users)
+            {
+                // check with all users in new lobby
+                foreach (User newUser in newUsers)
+                {
+                    // and update the score
+                    if (newUser.Username == user.Username)
+                    {
+                        Debug.WriteLine($"[GAME] setting score of {user.Username} to {newUser.Score}. it was {user.Score}");
+                        user.Score = newUser.Score;
+                        break;
+                    }
+                }
+            }
+
+            // update all the scores in the player list
+            HandleIncomingPlayer(newLobby);
+        }
+
+        
+    }
+}

Client/Views/GameWindow.xaml

@@ -22,24 +22,32 @@
         <Grid Grid.Column="0" Grid.Row="1">
             <Grid.RowDefinitions>
                 <RowDefinition/>
-                <RowDefinition/>
-                <RowDefinition/>
-                <RowDefinition/>
-                <RowDefinition/>
-                <RowDefinition/>
-                <RowDefinition/>
-                <RowDefinition/>
             </Grid.RowDefinitions>
 
-
+            <ListBox Name="PlayerList" ItemsSource="{Binding Path=Players}" Margin="10,0,0,10" FontSize="20"/>
         </Grid>
 
-        <Button Name="CanvasReset" Click="CanvasReset_Click" Grid.Row="0" Grid.Column="2" Margin="84,10,10,10" Content="RESET"/>
+        <Grid Grid.Row="0" Grid.Column="1">
+            <Grid.ColumnDefinitions>
+                <ColumnDefinition Width="160"/>
+                <ColumnDefinition Width="160"/>
+                <ColumnDefinition Width="*"/>
+                <ColumnDefinition Width="100"/>
+            </Grid.ColumnDefinitions>
+            <Label Grid.Row="0" Grid.Column="0" VerticalAlignment="Center" FontSize="20" Content="Pick a color -->"/>
+            <xctk:ColorPicker Name="ClrPcker_Background" SelectedColorChanged="ClrPcker_Background_SelectedColorChanged_1" Grid.Column="1" HorizontalAlignment="Left" VerticalAlignment="Center" Height="22" Width="100"/>
+
+
+            <Label Name="GuessWord" Grid.Row="0" Grid.Column="2" Content="{Binding Path=RandomWord, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" VerticalAlignment="Center" HorizontalAlignment="Center" FontSize="20"/>
+
+            <Button Name="CanvasReset" Click="CanvasReset_Click" Grid.Row="0" Grid.Column="3" Content="RESET"/>
+        </Grid>
+
+        <Button Name="StartGame" Grid.Row="0" Grid.Column="2" Content="Start Game" FontSize="20" Command="{Binding ButtonStartGame}" IsEnabled="{Binding IsHost}"/>
 
-        <xctk:ColorPicker Name="ClrPcker_Background" SelectedColorChanged="ClrPcker_Background_SelectedColorChanged_1" Grid.Column="1" HorizontalAlignment="Left" VerticalAlignment="Center" Height="22" Width="100"/>
 
         <Border Grid.Row="1" Grid.Column="1" Margin ="10,10,10,10" BorderBrush="Black" BorderThickness ="2.5">
-            <Canvas Name="CanvasForPaint" MouseDown="CanvasForPaint_MouseDown" MouseMove="CanvasForPaint_MouseMove">
+            <Canvas Name="CanvasForPaint" MouseDown="CanvasForPaint_MouseDown" MouseMove="CanvasForPaint_MouseMove" MouseUp="CanvasForPaint_MouseUp">
                 <Canvas.Background>
                     <SolidColorBrush Color="White" Opacity="0"/>
                 </Canvas.Background>
@@ -47,9 +55,9 @@
         </Border>
 
         <Grid Grid.Column="2" Grid.Row="1">
-            <ListBox Name ="TextBox" ItemsSource="{Binding Path=Messages}" Margin="0,0,0,69"/>
+            <ListBox Name ="TextBox" ItemsSource="{Binding Path=Messages}" Margin="0,0,10,69" />
 
-            <TextBox Name="ChatBox" Text="{Binding Message, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Margin="0,465,0,0">
+            <TextBox Name="ChatBox" Text="{Binding Message, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}" Margin="0,465,10,0">
                 <TextBox.InputBindings>
                     <KeyBinding Key="Return" Command="{Binding OnKeyDown}"/>
                 </TextBox.InputBindings>

Client/Views/GameWindow.xaml.cs

@@ -15,7 +15,7 @@ namespace Client.Views
         private ViewModelGame viewModel;
         public GameWindow()
         {
-            this.viewModel = new ViewModelGame();
+            this.viewModel = new ViewModelGame(this);
             DataContext = this.viewModel;
             Closing += this.viewModel.LeaveGame;
             InitializeComponent();
@@ -36,16 +36,6 @@ namespace Client.Views
         private void CanvasReset_Click(object sender, RoutedEventArgs e)
         {
             CanvasForPaint.Children.Clear();
-
-            //FOR FUTURE USE, IF NECCESSARY
-            //TEST.Children.Clear();
-
-            //foreach (UIElement child in CanvasForPaint.Children)
-            //{
-            //    var xaml = System.Windows.Markup.XamlWriter.Save(child);
-            //    var deepCopy = System.Windows.Markup.XamlReader.Parse(xaml) as UIElement;
-            //    TEST.Children.Add(deepCopy);
-            //}
         }
 
         private void ClrPcker_Background_SelectedColorChanged_1(object sender, RoutedPropertyChangedEventArgs<Color?> e)
@@ -53,5 +43,9 @@ namespace Client.Views
             viewModel.Color_Picker(e, this);
         }
 
+        private void CanvasForPaint_MouseUp(object sender, MouseButtonEventArgs e)
+        {
+            viewModel.Canvas_MouseUp(sender, e);
+        }
     }
 }

Client/Views/LoginScreen.xaml

@@ -11,6 +11,7 @@
             <RowDefinition Height="60"/>
             <RowDefinition Height="50"/>
             <RowDefinition Height="30"/>
+            <RowDefinition Height="100"/>
         </Grid.RowDefinitions>
 
         <Grid.ColumnDefinitions>
@@ -22,8 +23,9 @@
         <Label Grid.Row="1" FontSize="30" Content="Enter a username:"/>
         <Label Grid.Row="2" FontSize="15" Content="(max amount of characters for the username is 10)"/>
 
-        <TextBox Name="usernameTextbox" Grid.Row="1" Grid.Column="1" MaxLength="10" FontSize="30" VerticalAlignment="Center" HorizontalAlignment="Left" Width="250"/>
+        <TextBox Name="usernameTextbox" Grid.Row="1" Grid.Column="1" MaxLength="69" FontSize="30" VerticalAlignment="Center" HorizontalAlignment="Left" Width="250"/>
-        <Button Content="ENTER" Grid.Column="1" Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Right" Width="100" Height="40" Click="Button_EnterUsername"/>
+        <Button Name="LoginButton" Content="ENTER" Grid.Column="1" Grid.Row="1" VerticalAlignment="Center" HorizontalAlignment="Right" Width="100" Height="40" Click="Button_EnterUsername"/>
 
+        <Label Grid.Row="3" Grid.Column="0" Content="Tip of the century: base64 != UTF8!" FontSize="20" FontWeight="Bold"/>
     </Grid>
 </Window>

Client/Views/LoginScreen.xaml.cs

@@ -1,4 +1,5 @@
-using SharedClientServer;
+using Client.ViewModels;
+using SharedClientServer;
 using System;
 using System.Collections.Generic;
 using System.Text;
@@ -26,8 +27,12 @@ namespace Client.Views
 
         private void Button_EnterUsername(object sender, RoutedEventArgs e)
         {
-            User user = new User(usernameTextbox.Text);
+            string name = usernameTextbox.Text;
+            if (name == string.Empty) return;
+            User user = new User(name);
+
             Client client = new Client(user.Username);
+            LoginButton.IsEnabled = false;
             client.OnSuccessfullConnect = () =>
             {
                 // because we need to start the main window on a UI thread, we need to let the dispatcher handle it, which will execute the code on the ui thread
@@ -41,6 +46,7 @@ namespace Client.Views
                 });
             };
 
+            
         }
     }
 }

Client/Views/MainWindow.xaml

@@ -57,7 +57,8 @@
                 <GridView x:Name="grdList">
                     <GridViewColumn Header="Lobby ID" DisplayMemberBinding="{Binding ID}" Width="70"/>
                     <GridViewColumn Header="Players in" DisplayMemberBinding="{Binding PlayersIn}" Width="70"/>
-                    <GridViewColumn Header="max players available" DisplayMemberBinding="{Binding MaxPlayers}"/>
+                    <GridViewColumn Header="max players available" DisplayMemberBinding="{Binding MaxPlayers}" Width="150"/>
+                    <GridViewColumn Header="joinable" DisplayMemberBinding="{Binding LobbyJoinable}"/>
                 </GridView>
             </ListView.View>
         </ListView>

Server/Models/ServerClient.cs

@@ -6,22 +6,28 @@ using SharedClientServer;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.IO;
 using System.Net.Sockets;
 using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
 using static SharedClientServer.JSONConvert;
 
 namespace Server.Models
 {
+    public delegate void Callback();
     class ServerClient : ObservableObject
     {
         private TcpClient tcpClient;
         private NetworkStream stream;
-        private byte[] buffer = new byte[1024];
+        private byte[] buffer = new byte[2048];
-        private byte[] totalBuffer = new byte[1024];
+        private byte[] totalBuffer = new byte[2048];
+        private string _randomWord = "";
         private int totalBufferReceived = 0;
         public User User { get; set; }
         private ServerCommunication serverCom = ServerCommunication.INSTANCE;
-        
+        private Callback OnMessageReceivedOk;
+
 
         /// <summary>
         /// Constructor that creates a new serverclient object with the given tcp client.
@@ -45,49 +51,60 @@ namespace Server.Models
             if (ar == null || (!ar.IsCompleted) || (!this.stream.CanRead) || !this.tcpClient.Client.Connected)
                 return;
 
-
+            try
-            int bytesReceived = this.stream.EndRead(ar);
-
-            if (totalBufferReceived + bytesReceived > 1024)
             {
-                throw new OutOfMemoryException("buffer is too small!");
+                int bytesReceived = this.stream.EndRead(ar);
-            }
 
-            // copy the received bytes into the buffer
+                if (totalBufferReceived + bytesReceived > 2048)
-            Array.Copy(buffer, 0, totalBuffer, totalBufferReceived, bytesReceived);
-            // add the bytes we received to the total amount
-            totalBufferReceived += bytesReceived;
-
-            // calculate the expected length of the message
-            int expectedMessageLength = BitConverter.ToInt32(totalBuffer, 0);
-
-            while (totalBufferReceived >= expectedMessageLength)
-            {
-                // we have received the full packet
-                byte[] message = new byte[expectedMessageLength];
-                // copy the total buffer contents into the message array so we can pass it to the handleIncomingMessage method
-                Array.Copy(totalBuffer, 0, message, 0, expectedMessageLength);
-                HandleIncomingMessage(message);
-
-                // move the contents of the totalbuffer to the start of the array
-                Array.Copy(totalBuffer, expectedMessageLength, totalBuffer, 0, (totalBufferReceived - expectedMessageLength));
-
-                // remove the length of the expected message from the total buffer
-                totalBufferReceived -= expectedMessageLength;
-                // and set the new expected length to the rest that is still in the buffer
-                expectedMessageLength = BitConverter.ToInt32(totalBuffer, 0);
-
-                if (expectedMessageLength == 0)
                 {
-                    break;
+                    throw new OutOfMemoryException("buffer is too small!");
-                } 
+                }
 
 
+                // copy the received bytes into the buffer
+                Array.Copy(buffer, 0, totalBuffer, totalBufferReceived, bytesReceived);
+                // add the bytes we received to the total amount
+                totalBufferReceived += bytesReceived;
+
+                // calculate the expected length of the message
+                int expectedMessageLength = BitConverter.ToInt32(totalBuffer, 0);
+
+                while (totalBufferReceived >= expectedMessageLength)
+                {
+                    // we have received the full packet
+                    byte[] message = new byte[expectedMessageLength];
+                    // copy the total buffer contents into the message array so we can pass it to the handleIncomingMessage method
+                    Array.Copy(totalBuffer, 0, message, 0, expectedMessageLength);
+                    HandleIncomingMessage(message);
+
+                    // move the contents of the totalbuffer to the start of the array
+                    Array.Copy(totalBuffer, expectedMessageLength, totalBuffer, 0, (totalBufferReceived - expectedMessageLength));
+
+                    // remove the length of the expected message from the total buffer
+                    totalBufferReceived -= expectedMessageLength;
+                    // and set the new expected length to the rest that is still in the buffer
+                    expectedMessageLength = BitConverter.ToInt32(totalBuffer, 0);
+
+                    if (expectedMessageLength == 0)
+                    {
+                        break;
+                    }
+
+
+                }
+
+                ar.AsyncWaitHandle.WaitOne();
+                // start reading for a new message
+                stream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(OnRead), null);
+            }
+            catch (IOException e)
+            {
+                Debug.WriteLine("[SERVERCLIENT] Client disconnected! exception was " + e.Message);
+                tcpClient.Close();
+                ServerCommunication.INSTANCE.ServerClientDisconnect(this);
             }
-            // start reading for a new message
-            stream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(OnRead), null);
 
-            
+
         }
 
         /// <summary>
@@ -99,21 +116,21 @@ namespace Server.Models
             Debug.WriteLine($"Got message : {Encoding.ASCII.GetString(message)}");
             byte id = message[4];
             byte[] payload = new byte[message.Length - 5];
-            Array.Copy(message,5,payload,0,message.Length-5);
+            Array.Copy(message, 5, payload, 0, message.Length - 5);
             Debug.WriteLine("[SERVERCLIENT] GOT STRING" + Encoding.ASCII.GetString(payload));
-            switch(id)
+            switch (id)
             {
-                
+
                 case JSONConvert.LOGIN:
                     // json log in username data
                     string uName = JSONConvert.GetUsernameLogin(payload);
-                    
+
                     if (uName != null)
                     {
                         User = new User(uName);
                         User.Username = uName;
                         Debug.WriteLine("[SERVERCLIENT] set username to " + uName);
-                        
+
                     }
                     break;
                 case JSONConvert.MESSAGE:
@@ -129,6 +146,11 @@ namespace Server.Models
                         message = textMsg
                     };
 
+                    if (textMsg == _randomWord && !string.IsNullOrEmpty(_randomWord))
+                    {
+                        Debug.WriteLine($"[SERVERCLIENT] word has been guessed! {User.Username} + Word: {_randomWord}");
+                    }
+
                     //Sends the incomming message to be broadcast to all of the clients inside the current lobby.
                     serverCom.SendToLobby(serverCom.GetLobbyForUser(User), JSONConvert.GetMessageToSend(JSONConvert.MESSAGE, packet));
                     break;
@@ -136,13 +158,59 @@ namespace Server.Models
                 case JSONConvert.LOBBY:
                     // lobby data
                     LobbyIdentifier l = JSONConvert.GetLobbyIdentifier(payload);
-                    handleLobbyMessage(payload,l);
+                    handleLobbyMessage(payload, l);
                     break;
+
                 case JSONConvert.CANVAS:
-                    Debug.WriteLine("GOT A MESSAGE FROM THE CLIENT ABOUT THE CANVAS!!!");
+                    
+                    int typeToCheck = JSONConvert.GetCanvasMessageType(payload);
+                    switch (typeToCheck)
+                    {
+                        case JSONConvert.CANVAS_WRITING:
+                            dynamic canvasData = new
+                            {
+                                canvasType = typeToCheck,
+                                coords = JSONConvert.getCoordinates(payload),
+                                color = JSONConvert.getCanvasDrawingColor(payload)
+                            };
+                            serverCom.SendToLobby(serverCom.GetLobbyForUser(User),JSONConvert.GetMessageToSend(JSONConvert.CANVAS,canvasData));
+                            break;
+
+                        case JSONConvert.CANVAS_RESET:
+                            dynamic canvasDataForReset = new
+                            {
+                                type = JSONConvert.GetCanvasMessageType(payload)
+                            };
+                            serverCom.SendToLobby(serverCom.GetLobbyForUser(User), JSONConvert.GetMessageToSend(CANVAS, canvasDataForReset));
+                            break;
+                    }
+                    
+
                     // canvas data
                     // todo send canvas data to all other serverclients in lobby
                     break;
+
+                case JSONConvert.GAME:
+                    Debug.WriteLine("[SERVERCLIENT] Got a message about the game logic");
+                    string command = JSONConvert.GetGameCommand(payload);
+                    switch (command)
+                    {
+                        case "startGame":
+                            int lobbyID = JSONConvert.GetStartGameLobbyID(payload);
+                            serverCom.CloseALobby(lobbyID);
+                            ServerCommunication.INSTANCE.sendToAll(JSONConvert.ConstructLobbyListMessage(ServerCommunication.INSTANCE.lobbies.ToArray()));
+                            break;
+                    }
+
+                    break;
+                case JSONConvert.RANDOMWORD:
+                    //Flag byte for receiving the random word.
+                    break;
+                case JSONConvert.MESSAGE_RECEIVED:
+                    // we now can send a new message
+                    OnMessageReceivedOk?.Invoke();
+                    break;
+
                 default:
                     Debug.WriteLine("[SERVER] Received weird identifier: " + id);
                     break;
@@ -166,9 +234,20 @@ namespace Server.Models
                     break;
                 case LobbyIdentifier.JOIN:
                     int id = JSONConvert.GetLobbyID(payload);
-                    ServerCommunication.INSTANCE.JoinLobby(this.User,id);
+                    bool isHost;
-                    sendMessage(JSONConvert.ConstructLobbyJoinSuccessMessage());
+                    ServerCommunication.INSTANCE.JoinLobby(this.User,id, out isHost);
+                    sendMessage(JSONConvert.ConstructLobbyJoinSuccessMessage(isHost));
                     ServerCommunication.INSTANCE.sendToAll(JSONConvert.ConstructLobbyListMessage(ServerCommunication.INSTANCE.lobbies.ToArray()));
+                    OnMessageReceivedOk = () =>
+                    {
+                        _randomWord = JSONConvert.SendRandomWord("WordsForGame.json");
+                        serverCom.sendToAll(JSONConvert.GetMessageToSend(JSONConvert.RANDOMWORD, new
+                        {
+                            id = serverCom.GetLobbyForUser(User).ID,
+                            word = _randomWord
+                        }));
+                        OnMessageReceivedOk = null;
+                    };
                     break;
                 case LobbyIdentifier.LEAVE:
                     id = JSONConvert.GetLobbyID(payload);
@@ -179,6 +258,21 @@ namespace Server.Models
             }
         }
 
+        private async void SendLobbyData()
+        {
+            string result = await WaitForData();
+            if(result == "bruh momento")
+            {
+              
+            }
+        }
+
+        private async Task<string> WaitForData()
+        {
+            await Task.Delay(1000);
+            return "bruh momento";
+        }
+
         /// <summary>
         /// sends a message to the tcp client
         /// </summary>

Server/Models/ServerCommunication.cs

@@ -16,6 +16,7 @@ namespace Server.Models
         public bool Started = false;
         public List<Lobby> lobbies;
         private Dictionary<Lobby, List<ServerClient>> serverClientsInlobbies;
+        internal Action DisconnectClientAction;
         public Action newClientAction;
         
 
@@ -89,7 +90,7 @@ namespace Server.Models
         /// send a message to all tcp clients in the list
         /// </summary>
         /// <param name="message">the message to send</param>
-        public void sendToAll(byte[] message)
+        public async void sendToAll(byte[] message)
         {
             foreach (ServerClient sc in serverClients)
             {
@@ -97,6 +98,26 @@ namespace Server.Models
             }
         }
 
+        public void ServerClientDisconnect(ServerClient serverClient)
+        {
+            Debug.WriteLine("[SERVERCOMM] handling disconnect");
+            DisconnectClientAction?.Invoke();
+            int id = -1;
+            foreach (Lobby l in serverClientsInlobbies.Keys)
+            {
+                if (serverClientsInlobbies[l].Contains(serverClient))
+                {
+                    id = l.ID;
+                }break;
+            }
+
+            if (id != -1)
+            {
+                LeaveLobby(serverClient.User, id);
+                SendToAllExcept(serverClient, JSONConvert.ConstructLobbyLeaveMessage(id));
+            }
+        }
+
         public void SendToAllExcept(string username, byte[] message)
         {
             foreach (ServerClient sc in serverClients)
@@ -105,8 +126,32 @@ namespace Server.Models
             }
         }
 
+        public void SendToAllExcept(ServerClient sc, byte[] message)
+        {
+            foreach (ServerClient s in serverClients)
+            {
+                if (s != sc) s.sendMessage(message);
+            }
+        }
+
         public void SendToLobby(Lobby lobby, byte[] message)
         {
+            foreach (Lobby l in lobbies)
+            {
+                if (l == lobby)
+                {
+                    foreach (ServerClient sc in serverClientsInlobbies[l])
+                    {
+                        Debug.WriteLine("[SERVERCLIENT] Sending message");
+                        sc.sendMessage(message);
+                    }
+                    break;
+                }
+            }
+        }
+
+        public void SendCanvasDataToLobby(Lobby lobby, string username, byte[] message)
+        {
             foreach (Lobby l in lobbies)
             {
                 if (l == lobby)
@@ -117,7 +162,7 @@ namespace Server.Models
                     }
                     break;
                 }
-            }
+            }
         }
 
         public Lobby GetLobbyForUser(User user)
@@ -172,12 +217,18 @@ namespace Server.Models
             return lobby.ID;
         }
 
-        public void JoinLobby(User user, int id)
+        public void JoinLobby(User user, int id, out bool isHost)
         {
+            isHost = false;
             foreach (Lobby l in lobbies)
             {
                 if (l.ID == id)
                 {
+                    if (l.Users.Count == 0)
+                    {
+                        user.Host = true;
+                        isHost = true;
+                    }
                     AddToLobby(l, user);
                     Debug.WriteLine($"{user.Username} joined lobby with id {id}");
                     break;
@@ -219,5 +270,16 @@ namespace Server.Models
                 }
             }
         }
+
+        public void CloseALobby(int lobbyID)
+        {
+            foreach (Lobby lobby in lobbies)
+            {
+                if (lobby.ID == lobbyID)
+                {
+                    lobby.LobbyJoinable = false;
+                }
+            }
+        }
     }
 }

Server/Server.csproj

@@ -6,6 +6,16 @@
     <UseWPF>true</UseWPF>
   </PropertyGroup>
 
+  <ItemGroup>
+    <None Remove="resources\WordsForGame.json" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <Content Include="resources\WordsForGame.json">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
+
   <ItemGroup>
     <PackageReference Include="AsyncAwaitBestPractices" Version="4.3.0" />
     <PackageReference Include="Extended.Wpf.Toolkit" Version="4.0.1" />

Server/ViewModels/MainViewModel.cs

@@ -33,6 +33,10 @@ namespace Server.ViewModels
             {
                 InformationModel.ClientsConnected++;
             };
+            serverCommunication.DisconnectClientAction = () =>
+            {
+                InformationModel.ClientsConnected--;
+            };
             //BitmapImage onlineImg = new BitmapImage(new Uri(@"/img/online.png",UriKind.Relative));
             //BitmapImage offlineImg = new BitmapImage(new Uri(@"/img/offline.png", UriKind.Relative));
             

Server/resources/WordsForGame.json

@@ -0,0 +1,31 @@
+{
+  "filename": "wordsForGame",
+  "words": [
+    "teacher",
+    "love",
+    "engineer",
+    "supermarket",
+    "disaster",
+    "studio",
+    "restaurant",
+    "music",
+    "chocolate",
+    "dirt",
+    "thought",
+    "virus",
+    "lieutenant",
+    "painter",
+    "kiwi",
+    "power ranger",
+    "computer",
+    "people",
+    "candidate",
+    "security guard",
+    "Canada",
+    "teeth",
+    "army",
+    "airport",
+    "president",
+    "bedroom"
+  ]
+}

SharedClientServer/ClientServerUtil.cs

@@ -7,6 +7,8 @@ using System.Text;
 namespace SharedClientServer
 {
     public delegate void Callback();
+
+
     class ClientServerUtil
     {
         // creates a message array to send to the server or to clients

SharedClientServer/JSONConvert.cs

@@ -1,11 +1,13 @@
-using Client;
+using Client;
 using Newtonsoft.Json;
 using Newtonsoft.Json.Linq;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.IO;
 using System.Linq;
 using System.Text;
+using System.Windows.Media;
 
 namespace SharedClientServer
 {
@@ -15,6 +17,13 @@ namespace SharedClientServer
         public const byte MESSAGE = 0x02;
         public const byte LOBBY = 0x03;
         public const byte CANVAS = 0x04;
+        public const byte GAME = 0x05;
+        public const byte MESSAGE_RECEIVED = 0x06;
+        public const byte RANDOMWORD = 0x07;
+
+        public const int CANVAS_WRITING = 0;
+        public const int CANVAS_RESET = 1;
+        
 
         public enum LobbyIdentifier
         {
@@ -25,9 +34,10 @@ namespace SharedClientServer
             LIST,
             REQUEST
         }
+
         public static (string,string) GetUsernameAndMessage(byte[] json)
         {
-            string msg = Encoding.ASCII.GetString(json);
+            string msg = Encoding.UTF8.GetString(json);
             dynamic payload = JsonConvert.DeserializeObject(msg);
             
             return (payload.username, payload.message);
@@ -35,7 +45,7 @@ namespace SharedClientServer
 
         public static string GetUsernameLogin(byte[] json)
         {
-            dynamic payload = JsonConvert.DeserializeObject(Encoding.ASCII.GetString(json));
+            dynamic payload = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(json));
             return payload.username;
         }
 
@@ -83,6 +93,7 @@ namespace SharedClientServer
             });
         }
 
+
         public static byte[] ConstructLobbyJoinMessage(int lobbyID)
         {
             return GetMessageToSend(LOBBY, new
@@ -102,13 +113,13 @@ namespace SharedClientServer
         }
         public static LobbyIdentifier GetLobbyIdentifier(byte[] json)
         {
-            dynamic payload = JsonConvert.DeserializeObject(Encoding.ASCII.GetString(json));
+            dynamic payload = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(json));
             return payload.identifier;
         }
 
         public static Lobby[] GetLobbiesFromMessage(byte[] json)
         {
-            dynamic payload = JsonConvert.DeserializeObject(Encoding.ASCII.GetString(json));
+            dynamic payload = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(json));
             JArray lobbiesArray = payload.lobbies;
             Debug.WriteLine("[JSONCONVERT] got lobbies from message" + lobbiesArray.ToString());
             Lobby[] lobbiesTemp = lobbiesArray.ToObject<Lobby[]>();
@@ -122,23 +133,98 @@ namespace SharedClientServer
 
         public static int GetLobbyID(byte[] json)
         {
-            dynamic payload = JsonConvert.DeserializeObject(Encoding.ASCII.GetString(json));
+            dynamic payload = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(json));
             return payload.id;
         }
 
         public static Lobby GetLobby(byte[] json)
         {
-            dynamic payload = JsonConvert.DeserializeObject(Encoding.ASCII.GetString(json));
+            dynamic payload = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(json));
             JObject dynamicAsObject = payload.lobby;
             return dynamicAsObject.ToObject<Lobby>();
         }
 
-        public static byte[] ConstructLobbyJoinSuccessMessage()
+        public static byte[] ConstructLobbyJoinSuccessMessage(bool isHost)
         {
-            return GetMessageToSend(LOBBY, new { identifier = LobbyIdentifier.JOIN_SUCCESS});
+            return GetMessageToSend(LOBBY, new { identifier = LobbyIdentifier.JOIN_SUCCESS,
+            host = isHost});
+        }
+
+        public static bool GetLobbyJoinIsHost(byte[] json)
+        {
+            dynamic payload = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(json));
+            return payload.host;
         }
 
         #endregion
+
+        public static byte[] ConstructCanvasDataSend(int typeToSend, double[][] buffer, Color colorToSend)
+        {
+            
+            return GetMessageToSend(CANVAS, new
+            {
+                canvasType = typeToSend,
+                coords = buffer,
+                color = colorToSend
+            }); ;
+        }
+
+        public static byte[] ConstructDrawingCanvasData(double[][] buffer, Color colorToSend)
+        {
+            return GetMessageToSend(CANVAS, new
+            {
+                canvasType = CANVAS_WRITING,
+                coords = buffer,
+                color = colorToSend
+            });
+        }
+
+        public static int GetCanvasMessageType(byte[] json)
+        {
+            dynamic d = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(json));
+            return d.canvasType;
+        }
+
+        public static double[][] getCoordinates(byte[] payload)
+        {
+            Debug.WriteLine("got coords " + Encoding.UTF8.GetString(payload));
+            dynamic json = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(payload));
+            JArray coordinatesArray = json.coords;
+
+            double[][] coordinates = coordinatesArray.ToObject<double[][]>();
+
+            return coordinates;
+        }
+
+        public static Color getCanvasDrawingColor(byte[] payload)
+        {
+            dynamic json = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(payload));
+            Color color = json.color;
+            return color;
+        }
+
+        public static byte[] ConstructGameStartData(int lobbyID)
+        {
+            string startGame = "startGame";
+            return GetMessageToSend(GAME, new
+            {
+                command = startGame,
+                lobbyToStart = lobbyID
+            }); ;
+        }
+
+        public static string GetGameCommand(byte[] payload)
+        {
+            dynamic json = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(payload));
+            return json.command;
+        }
+
+        public static int GetStartGameLobbyID(byte[] payload)
+        {
+            dynamic json = JsonConvert.DeserializeObject(Encoding.UTF8.GetString(payload));
+            return json.lobbyToStart;
+        }
+
         /// <summary>
         /// constructs a message that can be sent to the clients or server
         /// </summary>
@@ -148,7 +234,8 @@ namespace SharedClientServer
         public static byte[] GetMessageToSend(byte identifier, dynamic payload)
         {
             // convert the dynamic to bytes
-            byte[] payloadBytes = Encoding.ASCII.GetBytes(JsonConvert.SerializeObject(payload));
+            string json = JsonConvert.SerializeObject(payload);
+            byte[] payloadBytes = Encoding.UTF8.GetBytes(json);
             // make the array that holds the message and copy the payload into it with the first spot containing the identifier
             byte[] res = new byte[payloadBytes.Length + 5];
             // put the payload in the res array
@@ -159,6 +246,40 @@ namespace SharedClientServer
             Array.Copy(BitConverter.GetBytes(payloadBytes.Length+5),0,res,0,4);
             return res;
         }
+      
+             /*
+         * This method sends a random word from the json file, this happens when the client joins a lobby.
+         */
+        public static string SendRandomWord(string filename)
+        {
+            dynamic words;
+            Random random = new Random();
+            string workingDir = Path.GetFullPath(@"..\Server");
+            string projDir = Directory.GetParent(workingDir).Parent.Parent.FullName;
+            string filePath = projDir += $@"\resources\{filename}";
+
+            using(StreamReader reader = new StreamReader(filePath))
+            {
+                string json = reader.ReadToEnd();
+                words = JsonConvert.DeserializeObject(json);
+            }
+
+
+            int index = random.Next(0, 24);
+
+            Debug.WriteLine($"[SERVERCLIENT] Sending random words {words}");
+
+            return words.words[index];
+        }
+        
+        /*
+         * Client gets the payload and retrieves the word from the payload
+         */
+        public static string GetRandomWord(byte[] json)
+        {
+            dynamic payload = JsonConvert.DeserializeObject(Encoding.ASCII.GetString(json));
+            return payload.word;
+        }
 
         
     }

SharedClientServer/Lobby.cs

@@ -6,7 +6,7 @@ using System.Text;
 
 namespace Client
 {
-    class Lobby : INotifyPropertyChanged
+    internal class Lobby : INotifyPropertyChanged
     {
         public event PropertyChangedEventHandler PropertyChanged;
 
@@ -14,6 +14,7 @@ namespace Client
         private int _id;
         private int _playersIn;
         private int _maxPlayers;
+        private bool _lobbyJoinable;
         //private List<string> _usernames;
         private List<User> _users;
 
@@ -34,6 +35,7 @@ namespace Client
             _maxPlayers = maxPlayers;
             //_usernames = new List<string>();
             _users = new List<User>();
+            _lobbyJoinable = true;
         }
 
         public void AddUser(string username, out bool succes)
@@ -41,7 +43,7 @@ namespace Client
             succes = false;
             if (_users.Count < _maxPlayers)
             {
-                _users.Add(new User(username, 0, false));
+                _users.Add(new User(username, 0, false, false));
                 succes = true;
             }
         }
@@ -87,6 +89,11 @@ namespace Client
             set { _users = value; }
         }
 
+        public bool LobbyJoinable
+        {
+            get { return _lobbyJoinable; }
+            set { _lobbyJoinable = value; }
+        }
 
     }
 }

SharedClientServer/User.cs

@@ -11,14 +11,17 @@ namespace SharedClientServer
         private string _username;
         private int _score;
         private bool _host;
+        private bool _turnToDraw;
         private string _message;
+        private string _randomWord;
 
         [JsonConstructor]
-        public User(string username, int score, bool host)
+        public User(string username, int score, bool host, bool turnToDraw)
         {
             _username = username;
             _score = score;
             _host = host;
+            _turnToDraw = turnToDraw;
         }
 
         public User(string username)
@@ -26,6 +29,7 @@ namespace SharedClientServer
             _username = username;
             _score = 0;
             _host = false;
+            _turnToDraw = false;
         }
 
         public static bool operator ==(User u1, User u2)
@@ -81,5 +85,16 @@ namespace SharedClientServer
             get { return _host; }
             set { _host = value; }
         }
+
+        public bool TurnToDraw
+        {
+            get { return _turnToDraw; }
+            set { _turnToDraw = value; }
+        }
+        public string RandomWord
+        {
+            get { return _randomWord; }
+            set { _randomWord = value; }
+        }
     }
 }