[FIX] fixed handling client disconnect

Server/Models/ServerClient.cs

@@ -6,6 +6,7 @@ using SharedClientServer;
 using System;
 using System.Collections.Generic;
 using System.Diagnostics;
+using System.IO;
 using System.Net.Sockets;
 using System.Text;
 using static SharedClientServer.JSONConvert;
@@ -45,48 +46,56 @@ 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 > 1024)
-            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;
+                    }
+
+
+                }
+                // start reading for a new message
+                stream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(OnRead), null);
 
             }
-            // start reading for a new message
+            catch (IOException e)
-            stream.BeginRead(buffer, 0, buffer.Length, new AsyncCallback(OnRead), null);
+            {
-
+                tcpClient.Close();
+                ServerCommunication.INSTANCE.ServerClientDisconnect(this);
+            }
+            
             
         }
 

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;
         
 
@@ -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)

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));