BeWoPlaner/Android/BewoMitarbeiterApp/app/src/main/java/tcpConnection/SocketManager.java

package tcpConnection;

import android.util.Log;

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.Socket;
import java.util.Timer;
import java.util.TimerTask;

import soapConnection.DataIdentifier;
import soapConnection.Packet;
import soapConnection.SoapCalls;

/**
 * Created by JettenM on 04.08.2016.
 */
public class SocketManager {

    private static final String TAG = "SOCKET_MANAGER";

    public static String tenant;
    public static Socket socket;
    public static Thread listenerThread;
    public static SocketListener socketListener;
    public static UIHandler uiHandler;
    public static DataOutputStream dataOutputStream;

    public static void connectToServer(){
        new Thread(new OpenConnection()).start();
    }

    public static void sendMessage(Packet packet) {
        new Thread(new MessageSender(packet.getDataStream())).start();
    }

    public static class OpenConnection implements Runnable {
        public void run() {
            try {
                socket = new Socket(SoapCalls.DESTINATION_ADDRESS, SoapCalls.DESTINATION_PORT);

                LoginOnServer();

                dataOutputStream = new DataOutputStream(socket.getOutputStream());

                socketListener = new SocketListener();
                listenerThread = new Thread(socketListener);
                listenerThread.start();
            } catch(Exception exception) {
                socket = null;
                try {
                    new Timer().schedule(new TimerTask() {
                        @Override
                        public void run() {
                            connectToServer();
                        }
                    }, 30000);
                } catch(Exception exception2) {
                    exception2.printStackTrace();
                }

                exception.printStackTrace();
            }
        }
    }

    public static void closeSocketListener() {
        if(listenerThread != null && listenerThread.isAlive()) {
            try {
                socketListener.terminate();
                listenerThread.join();
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }

    public static void Logout() {
        if(socket != null && socket.isConnected()) {
            try {
                Packet packet = new Packet();

                packet.ChatDataIdentifier = DataIdentifier.LOGOUT;

                new Thread(new MessageSender(packet.getDataStream())).start();

            } catch(Exception exception) {
                exception.printStackTrace();
            }
        }
    }

    public static void LoginOnServer() {
        if(socket != null && socket.isConnected()) {
            try {
                Packet packet = new Packet();
                packet.Tenant = tenant;

                packet.ChatDataIdentifier = DataIdentifier.LOGIN;

                new Thread(new MessageSender(packet.getDataStream())).start();

            } catch(Exception exception) {
                exception.printStackTrace();
            }
        }
    }

    public static class ConnectionClose implements Runnable{
        public void run(){
            try {
                if (dataOutputStream != null) {
                    dataOutputStream.flush();
                    dataOutputStream.close();
                }

                if (socket != null) {
                    socket.close();
                }

            }catch(IOException se){
                se.printStackTrace();
            }
        }
    }

    public static class MessageSender implements Runnable {
        byte[] packetToSend;

        public MessageSender(byte[] packet2Send) {
            packetToSend = packet2Send;
        }

        @Override
        public void run() {
            if(!socket.isConnected()) {
                Log.e("MESSAGE_SENDER", "Socket ist nicht verbunden");
            }

            if(socket != null && dataOutputStream != null) {
                try {
                    dataOutputStream.write(packetToSend);
                    dataOutputStream.flush();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

    public static class SocketListener implements Runnable {

        Packet chatPacket;

        private volatile boolean isRunning = true;

        public void terminate() {
            isRunning = false;
        }

        @Override
        public void run() {
            try {
                while (isRunning) {
                    if (socket != null) {
                        if (socket.isConnected()) {

                            InputStream stream = socket.getInputStream();

                            int size = stream.available();

                            if(size == 0) {
                                continue;
                            }

                            StringBuilder total = new StringBuilder(stream.available());

                            int counter = 0;

                            byte[] message = new byte[size];

                            stream.read(message, 0, size);

//                            while(counter < size) {
//
//                                char c = (char) stream.read();
//
//                                total.append(c);
//
//                                counter++;
//                            }

                            try {
                                //chatPacket = new Packet(total.toString());
                                chatPacket = new Packet(new String(message, "UTF-8"));

                                Log.i(TAG, "Empfange Nachricht... " + chatPacket.ChatMessage);

                            } catch(Exception e) {
                                e.printStackTrace();
                            }

                            if(uiHandler != null) {
                                uiHandler.updateUserInterface(chatPacket);
                            } else {
                                Log.e("ERROR_SOCKETLISTENER", "uiHandler ist null");
                            }
                        }
                    }
                }
            } catch(Exception exception) {
                exception.printStackTrace();
            }
        }
    }
}