package

lib/src/Net/NetworkConnection.dart

@@ -0,0 +1,198 @@
+/*
+
+Copyright (c) 2019 Ahmed Kh. Zamil
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+*/
+
+import '../Core/IDestructible.dart';
+import 'Sockets/ISocket.dart';
+import 'Sockets/SocketState.dart';
+import 'NetworkBuffer.dart';
+import '../Data/DC.dart';
+import 'Sockets/IPEndPoint.dart';
+
+class NetworkConnection extends IDestructible
+{
+    ISocket _sock;
+
+    DateTime _lastAction;
+
+    //public delegate void DataReceivedEvent(NetworkConnection sender, NetworkBuffer data);
+    //public delegate void ConnectionClosedEvent(NetworkConnection sender);
+    //public delegate void ConnectionEstablishedEvent(NetworkConnection sender);
+
+    //public event ConnectionEstablishedEvent OnConnect;
+    //public event DataReceivedEvent OnDataReceived;
+    //public event ConnectionClosedEvent OnClose;
+    //public event DestroyedEvent OnDestroy;
+    //object receivingLock = new object();
+
+    bool _processing = false;
+
+
+    void destroy()
+    {
+        // if (connected)
+        close();
+        emitArgs("close", [this]);
+        //OnDestroy?.Invoke(this);
+    }
+
+    NetworkConnection()
+    {
+
+    }
+
+
+
+    ISocket get socket => _sock;
+    
+    void assign(ISocket socket)
+    {
+        _lastAction =  DateTime.now();
+        _sock = socket;
+        
+        socket.on("receive", socket_OnReceive);
+        socket.on("close", socket_OnClose);
+        socket.on("connect", socket_OnConnect);
+        
+    }
+
+    
+    void socket_OnConnect()
+    {
+        emitArgs("connect", [this]);
+    }
+
+    void socket_OnClose()
+    {
+        emitArgs("close", [this]);
+    }
+
+    void socket_OnReceive(NetworkBuffer buffer)
+    {
+        try
+        {
+            // Unassigned ?
+            if (_sock == null)
+                return;
+
+            // Closed ?
+            if (_sock.state == SocketState.Closed || _sock.state == SocketState.Terminated) // || !connected)
+                return;
+
+            _lastAction = DateTime.now();
+
+            if (!_processing)
+            {
+                _processing = true;
+
+                try
+                {
+                    while (buffer.available > 0 && !buffer.protected)
+                        dataReceived(buffer);
+                }
+                catch(ex)
+                {
+
+                }
+
+                _processing = false;
+            }
+            
+        }
+        catch (ex)
+        {
+            //Global.Log("NetworkConnection", LogType.Warning, ex.ToString());
+        }
+    }
+
+    ISocket unassign()
+    {
+        if (_sock != null)
+        {
+            // connected = false;
+            _sock.off("close", socket_OnClose);
+            _sock.off("connect", socket_OnConnect);
+            _sock.off("receive", socket_OnReceive);
+
+            var rt = _sock;
+            _sock = null;
+
+            return rt;
+        }
+        else
+            return null;
+    }
+
+    void dataReceived(NetworkBuffer data)
+    {
+        emitArgs("dataReceived", [data]);
+    }
+    
+    void close()
+    {
+      
+        try
+        {
+            if (_sock != null)
+                _sock.close();
+        }
+        catch(ex)
+        {
+            //Global.Log("NetworkConenction:Close", LogType.Error, ex.ToString());
+
+        }
+    }
+
+    DateTime get lastAction => _lastAction;
+    
+
+    IPEndPoint get remoteEndPoint => _sock?.remoteEndPoint;
+    
+    IPEndPoint get localEndPoint => _sock?.localEndPoint;
+    
+    bool get connected => _sock.state == SocketState.Established;
+
+    
+    void send(DC msg)
+    {
+      
+        try
+        {
+      
+            if (_sock != null)
+            {
+                _lastAction = DateTime.now();
+                _sock.send(msg);
+            }
+        }
+        catch (ex)
+        {
+            //Console.WriteLine(ex.ToString());
+        }
+    }
+
+    void sendString(String data)
+    {
+        send(DC.stringToBytes(data));
+    }
+}