Merge branch 'master' into feature/jsonForWords

merge Feature/host when enter empty lobby into master

Client/Client.cs

@@ -8,7 +8,8 @@ using static SharedClientServer.JSONConvert;
 
 namespace Client
 {
-    public delegate void OnLobbyCreated(int id);
+    public delegate void LobbyCallback(int id);
+    public delegate void LobbyJoinCallback(bool isHost);
     class Client : ObservableObject
     {
         private TcpClient tcpClient;
@@ -21,9 +22,11 @@ namespace Client
         private string username;
         public Callback OnSuccessfullConnect;
         public Callback OnLobbiesListReceived;
-        public Callback OnLobbyJoinSuccess;
+        public LobbyJoinCallback OnLobbyJoinSuccess;
         public Callback OnLobbiesReceivedAndWaitingForHost;
-        public OnLobbyCreated OnLobbyCreated;
+        public LobbyCallback OnLobbyCreated;
+        public LobbyCallback OnLobbyLeave;
+        private ClientData data = ClientData.Instance;
         public Lobby[] Lobbies { get; set; }
 
         public Client(string username)
@@ -46,6 +49,9 @@ namespace Client
 
         private void OnReadComplete(IAsyncResult ar)
         {
+            if (ar == null || (!ar.IsCompleted) || (!this.stream.CanRead) || !this.tcpClient.Client.Connected)
+                return;
+
             int amountReceived = stream.EndRead(ar);
 
             if (totalBufferReceived + amountReceived > 1024)
@@ -71,6 +77,7 @@ namespace Client
                 expectedMessageLength = BitConverter.ToInt32(totalBuffer, 0);
             }
 
+            ar.AsyncWaitHandle.WaitOne();
             stream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(OnReadComplete), null);
         }
 
@@ -81,6 +88,7 @@ namespace Client
             byte[] payload = new byte[message.Length - 5];
             Array.Copy(message, 5, payload, 0, message.Length - 5);
 
+            Debug.WriteLine("[CLIENT] GOT STRING" + Encoding.ASCII.GetString(payload));
             switch (id)
             {
                 case JSONConvert.LOGIN:
@@ -92,6 +100,11 @@ namespace Client
                     string textUsername = combo.Item1;
                     string textMsg = combo.Item2;
 
+                    if(textUsername != data.User.Username)
+                    {
+                        ViewModels.ViewModelGame.HandleIncomingMsg(textUsername, textMsg);
+                    }
+
                     //TODO display username and message in chat window
                     Debug.WriteLine("[CLIENT] INCOMING MESSAGE!");
                     Debug.WriteLine("[CLIENT] User name: {0}\t User message: {1}", textUsername, textMsg);
@@ -116,7 +129,12 @@ 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);
+                            OnLobbyLeave?.Invoke(lobbyLeaveID);
                             break;
                     }
                     //TODO fill lobby with the data received
@@ -126,6 +144,13 @@ namespace Client
                     // canvas data
                     break;
 
+                case JSONConvert.RANDOMWORD:
+                    //Flag byte for receiving the random word.
+                    int lobbyId = JSONConvert.GetLobbyID(payload);
+
+                    if(data.Lobby?.ID == lobbyId)
+                    ViewModels.ViewModelGame.HandleRandomWord(JSONConvert.GetRandomWord(payload));
+                    break;
                 default:
                     Debug.WriteLine("[CLIENT] Received weird identifier: " + id);
                     break;

Client/ViewModels/ViewModel.cs

@@ -34,6 +34,7 @@ namespace Client
             _lobbies = new ObservableCollection<Lobby>();
             client = ClientData.Instance.Client;
             client.OnLobbiesListReceived = updateLobbies;
+            client.OnLobbyLeave = leaveLobby;
             
 
             OnHostButtonClick = new RelayCommand(hostGame);
@@ -41,6 +42,13 @@ namespace Client
             JoinSelectedLobby = new RelayCommand(joinLobby, true);
         }
 
+        private void leaveLobby(int id)
+        {
+            _model.CanStartGame = true;
+            ClientData.Instance.Lobby = null;
+            SelectedLobby = null;
+        }
+
         private void hostGame()
         {
             Debug.WriteLine("attempting to host game for " + ClientData.Instance.User.Username);
@@ -77,14 +85,14 @@ namespace Client
 
         private void joinLobby()
         {
-            // lobby die je wilt joinen verwijderen
+            
-            // nieuwe binnengekregen lobby toevoegen
             client.OnLobbyJoinSuccess = OnLobbyJoinSuccess;
             client.SendMessage(JSONConvert.ConstructLobbyJoinMessage(SelectedLobby.ID));
         }
 
-        private void OnLobbyJoinSuccess()
+        private void OnLobbyJoinSuccess(bool isHost)
         {
+            ClientData.Instance.User.Host = isHost;
             startGameInLobby();
         }
 
@@ -97,19 +105,6 @@ namespace Client
             Application.Current.Dispatcher.Invoke(delegate
             {
 
-                //for (int i = 0; i < lobbiesArr.Length; i++)
-                //{
-                //    Lobby lobby = lobbiesArr[i];
-                //    Debug.WriteLine(lobby.PlayersIn);
-                //    if (i < _lobbies.Count && _lobbies[i].ID == lobby.ID)
-                //    {
-                //        _lobbies[i].Set(lobby);
-                //    } else
-                //    {
-                //        _lobbies.Add(lobbiesArr[i]);
-                //    }
-                //}
-
                 _lobbies.Clear();
 
                 foreach (Lobby l in lobbiesArr)

Client/ViewModels/ViewModelGame.cs

@@ -1,10 +1,12 @@
 
-using Client.Views;
+using Client.Views;
 using GalaSoft.MvvmLight.Command;
 using SharedClientServer;
 using System.Collections.ObjectModel;
 using System.ComponentModel;
+using System.Diagnostics;
 using System.Windows;
+using System.Windows.Controls;
 using System.Windows.Input;
 using System.Windows.Media;
 using System.Windows.Shapes;
@@ -20,13 +22,19 @@ namespace Client.ViewModels
         private Point currentPoint = new Point();
         private Color color;
 
-        public ObservableCollection<string> Messages { get; } = new ObservableCollection<string>();
+        public static ObservableCollection<string> Messages { get; } = new ObservableCollection<string>();
 
         private dynamic _payload;
 
-        private string _username;
+        public static string Word
+        {
+            get;
+            set;
+        }
 
-        private string _message;
+        public string _username;
+
+        public string _message;
         public string Message
         {
             get
@@ -85,17 +93,6 @@ namespace Client.ViewModels
 
         public ViewModelGame()
         {
-            if (_payload == null)
-            {
-                _message = "";
-
-            }
-            else
-            {
-                //_message = data.Message;
-                //_username = data.User.Username;
-                //Messages.Add($"{data.User.Username}: {Message}");
-            }
             OnKeyDown = new RelayCommand(ChatBox_KeyDown);
         }
 
@@ -120,7 +117,32 @@ namespace Client.ViewModels
             data.Client.SendMessage(JSONConvert.GetMessageToSend(JSONConvert.MESSAGE, _payload));
         }
 
+        /*
+         * MISC make this a callback
+         * Handles the incoming chat message from another client.
+         */
+        public static void HandleIncomingMsg(string username, string message)
+        {
+            Application.Current.Dispatcher.Invoke(delegate
+            {
+                Messages.Add($"{username}: {message}");
+            });
+        }
+        public void LeaveGame(object sender, CancelEventArgs e)
+        {
+            Debug.WriteLine("Leaving...");
+            data.Client.SendMessage(JSONConvert.ConstructLobbyLeaveMessage(data.Lobby.ID));
+        }
 
+        /*
+         * MISC make this a callback
+         * Handles the random word that has been received from the server.
+         */
+        public static void HandleRandomWord(string randomWord)
+        {
+            Debug.WriteLine("[CLIENT] Reached the handle random word method!");
+            Word = "NegerPik";
+        }
     }
 }
 

Client/Views/GameWindow.xaml

@@ -3,7 +3,6 @@
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
         xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
-        xmlns:local="clr-namespace:Client.Views"
         xmlns:xctk="http://schemas.xceed.com/wpf/xaml/toolkit"
         mc:Ignorable="d"
         Title="Scrubl.io" Height="600" Width="1200">
@@ -37,6 +36,8 @@
 
         <Button Name="CanvasReset" Click="CanvasReset_Click" Grid.Row="0" Grid.Column="2" Margin="84,10,10,10" Content="RESET"/>
 
+        <Label Name="GuessWord" Grid.Row="0" Grid.Column="1" Content="{Binding Path=Word, UpdateSourceTrigger=PropertyChanged}" Margin="140,0,109,0"/>
+
         <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">

Client/Views/GameWindow.xaml.cs

@@ -1,15 +1,8 @@
 using Client.ViewModels;
-using System;
-using System.Collections.Generic;
-using System.Text;
 using System.Windows;
-using System.Windows.Controls;
-using System.Windows.Data;
-using System.Windows.Documents;
 using System.Windows.Input;
 using System.Windows.Media;
-using System.Windows.Media.Imaging;
+
-using System.Windows.Shapes;
 
 namespace Client.Views
 {
@@ -24,6 +17,7 @@ namespace Client.Views
         {
             this.viewModel = new ViewModelGame();
             DataContext = this.viewModel;
+            Closing += this.viewModel.LeaveGame;
             InitializeComponent();
             
         }
@@ -58,5 +52,6 @@ namespace Client.Views
         {
             viewModel.Color_Picker(e, this);
         }
+
     }
 }

Server/Models/ServerClient.cs

@@ -6,8 +6,11 @@ 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
@@ -45,7 +48,8 @@ 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)
@@ -84,8 +88,15 @@ namespace Server.Models
 
 
                 }
+                ar.AsyncWaitHandle.WaitOne();
                 // start reading for a new message
                 stream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(OnRead), null);
+            }
+            catch (IOException e)
+            {
+                tcpClient.Close();
+                ServerCommunication.INSTANCE.ServerClientDisconnect(this);
+            }
 
 
         }
@@ -99,9 +110,9 @@ 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:
@@ -122,23 +133,31 @@ namespace Server.Models
                     string textUsername = combo.Item1;
                     string textMsg = combo.Item2;
 
-                    Debug.WriteLine("[SERVERCLIENT] User name: {0}\t User message: {1}", textUsername, textMsg);
+                    //Takes the data sent from the client, and then sets it in a data packet to be sent.
+                    dynamic packet = new
+                    {
+                        username = textUsername,
+                        message = textMsg
+                    };
 
-                    // todo handle sending to all except this user the username and message to display in chat
+                    //Sends the incomming message to be broadcast to all of the clients inside the current lobby.
-                    serverCom.SendToLobby(ServerCommunication.INSTANCE.GetLobbyForUser(User),payload);
+                    serverCom.SendToLobby(serverCom.GetLobbyForUser(User), JSONConvert.GetMessageToSend(JSONConvert.MESSAGE, packet));
-                    Debug.WriteLine("Payload has been sent!");
                     break;
 
                 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!!!");
                     // canvas data
                     // todo send canvas data to all other serverclients in lobby
                     break;
+
+                case JSONConvert.RANDOMWORD:
+                    //Flag byte for receiving the random word.
+                    break;
                 default:
                     Debug.WriteLine("[SERVER] Received weird identifier: " + id);
                     break;
@@ -162,13 +181,46 @@ namespace Server.Models
                     break;
                 case LobbyIdentifier.JOIN:
                     int id = JSONConvert.GetLobbyID(payload);
-                    ServerCommunication.INSTANCE.JoinLobby(this.User,id);
+                    ServerCommunication.INSTANCE.JoinLobby(this.User, id);
                     sendMessage(JSONConvert.ConstructLobbyJoinSuccessMessage());
+
+                    bool isHost;
+                    ServerCommunication.INSTANCE.JoinLobby(this.User,id, out isHost);
+                    sendMessage(JSONConvert.ConstructLobbyJoinSuccessMessage(isHost));
+                    ServerCommunication.INSTANCE.sendToAll(JSONConvert.ConstructLobbyListMessage(ServerCommunication.INSTANCE.lobbies.ToArray()));
+
+                    //Task.Run(SendLobbyData);
+
+                    serverCom.sendToAll(JSONConvert.GetMessageToSend(JSONConvert.RANDOMWORD, new
+                    {
+                        id = serverCom.GetLobbyForUser(User).ID,
+                        word = JSONConvert.SendRandomWord("WordsForGame.json")
+                    }));
+                    break;
+                case LobbyIdentifier.LEAVE:
+                    id = JSONConvert.GetLobbyID(payload);
+                    ServerCommunication.INSTANCE.LeaveLobby(User, id);
+                    sendMessage(JSONConvert.ConstructLobbyLeaveMessage(id));
                     ServerCommunication.INSTANCE.sendToAll(JSONConvert.ConstructLobbyListMessage(ServerCommunication.INSTANCE.lobbies.ToArray()));
                     break;
             }
         }
 
+        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)
@@ -105,6 +126,14 @@ 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)
@@ -113,6 +142,7 @@ namespace Server.Models
                 {
                     foreach (ServerClient sc in serverClientsInlobbies[l])
                     {
+                        Debug.WriteLine("[SERVERCLIENT] Sending message");
                         sc.sendMessage(message);
                     }
                     break;
@@ -161,6 +191,7 @@ namespace Server.Models
             }
         }
 
+
         public int HostForLobby(User user)
         {
             Lobby lobby = new Lobby( lobbies.Count + 1,0, 8);
@@ -171,17 +202,58 @@ 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($"{user.Username} joined lobby with id {id}");
                     break;
                 }
             }
         }
+
+        public void LeaveLobby(User user, int id)
+        {
+            Debug.WriteLine("[SERVERCOMM] removing user from lobby");
+            foreach (Lobby l in lobbies)
+            {
+                if (l.ID == id)
+                {
+                    Debug.WriteLine($"[SERVERCOMM] checking for lobby with id {l.ID}");
+                    
+                    foreach (User u in l.Users)
+                    {
+                        Debug.WriteLine($"[SERVERCOMM] checking if {u.Username} is {user.Username} ");
+                        // contains doesn't work, so we'll do it like this...
+                        if (u.Username == user.Username)
+                        {
+                            Debug.WriteLine("[SERVERCOMM] removed user from lobby!");
+                            l.Users.Remove(user);
+                            foreach (ServerClient sc in serverClients)
+                            {
+                                if (sc.User.Username == user.Username)
+                                {
+                                    serverClientsInlobbies[l].Remove(sc);
+                                    break;
+                                }
+                            }
+                            break;
+                        }
+                    }
+
+                    
+                   
+                }
+            }
+        }
     }
 }

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/JSONConvert.cs

@@ -1,9 +1,11 @@
 using Client;
+using Microsoft.VisualBasic.CompilerServices;
 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;
 
@@ -15,6 +17,7 @@ namespace SharedClientServer
         public const byte MESSAGE = 0x02;
         public const byte LOBBY = 0x03;
         public const byte CANVAS = 0x04;
+        public const byte RANDOMWORD = 0x05;
 
         public enum LobbyIdentifier
         {
@@ -133,13 +136,19 @@ namespace SharedClientServer
             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.ASCII.GetString(json));
+            return payload.host;
         }
 
         #endregion
-
         /// <summary>
         /// constructs a message that can be sent to the clients or server
         /// </summary>
@@ -161,6 +170,38 @@ namespace SharedClientServer
             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/User.cs

@@ -1,11 +1,12 @@
 using Newtonsoft.Json;
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Text;
 
 namespace SharedClientServer
 {
-    class User
+    class User : IEquatable<User>
     {
         private string _username;
         private int _score;
@@ -27,6 +28,42 @@ namespace SharedClientServer
             _host = false;
         }
 
+        public static bool operator ==(User u1, User u2)
+        {
+            if (object.ReferenceEquals(u1, null))
+            {
+                return object.ReferenceEquals(u2, null);
+            }
+            return u1.Equals(u2 as object);
+        }
+
+        public static bool operator !=(User u1, User u2)
+        {
+            if (object.ReferenceEquals(u1, null))
+            {
+                return object.ReferenceEquals(u2, null);
+            }
+            return u1.Equals(u2 as object);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if ((obj == null) || !this.GetType().Equals(obj.GetType()))
+            {
+                return false;
+            }
+            else
+            {
+                return this.Equals(obj as User);
+                
+            }
+        }
+
+        public bool Equals([AllowNull] User other)
+        {
+            return other.Username == this.Username;
+        }
+
         public string Username
         {
             get { return _username; }