Merge branch 'network'

app/src/main/java/network/Connexion.java

@@ -0,0 +1,40 @@
+package network;
+
+import java.io.IOException;
+import java.io.ObjectOutputStream;
+import java.net.Socket;
+
+import network.protocol.Packet;
+import network.protocol.PacketVisitor;
+
+public abstract class Connexion implements PacketVisitor {
+	
+	final Socket socket;
+	private final ObjectOutputStream objectOutputStream;
+	private final ConnexionThread connexionThread;
+
+	public Connexion(Socket socket) throws IOException {
+		this.socket = socket;
+		this.objectOutputStream = new ObjectOutputStream(this.socket.getOutputStream());
+		this.connexionThread = new ConnexionThread(this);
+		this.connexionThread.start();
+	}
+
+	public boolean isClosed() {
+		return this.socket.isClosed();
+	}
+
+	public synchronized void sendPacket(Packet packet) {
+		try {
+			objectOutputStream.writeObject(packet);
+			objectOutputStream.flush();
+		} catch (IOException e) {
+			System.err.println("Error while sending packet ! " + e.getLocalizedMessage());
+			close();
+		}
+	}
+
+	public void close() {
+		this.connexionThread.cancel();
+	}
+}

app/src/main/java/network/ConnexionThread.java

@@ -0,0 +1,44 @@
+package network;
+
+import java.io.IOException;
+import java.io.ObjectInputStream;
+
+import network.protocol.Packet;
+
+public class ConnexionThread extends Thread {
+
+	private final Connexion connexion;
+	private final ObjectInputStream objectInputStream;
+
+	public ConnexionThread(Connexion connexion) throws IOException {
+		this.connexion = connexion;
+		this.objectInputStream = new ObjectInputStream(this.connexion.socket.getInputStream());
+	}
+
+	@Override
+	public void run() {
+		while (!interrupted()) {
+			try {
+				// System.out.println(objectInputStream.available());
+				Object o = objectInputStream.readObject();
+				if (o instanceof Packet packet) {
+					connexion.visitPacket(packet);
+				}
+			} catch (ClassNotFoundException | IOException e) {
+				e.printStackTrace();
+				this.connexion.close();
+				break;
+			}
+		}
+	}
+
+	public void cancel() {
+		try {
+			objectInputStream.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		interrupt();
+	}
+
+}

app/src/main/java/network/client/Client.java

@@ -0,0 +1,57 @@
+package network.client;
+
+import java.io.IOException;
+import java.net.UnknownHostException;
+import java.util.Random;
+
+import common.Signal;
+import game.Game;
+import game.Player;
+import network.protocol.packets.LoginPacket;
+
+public class Client {
+	private final ClientConnexion clientConnection;
+	private final Game game;
+
+	public final Signal onConnect = new Signal();
+	public final Signal onDisconnect = new Signal();
+	public final Signal onClosed = new Signal();
+	public final Signal onGameStarted = new Signal();
+
+	String disconnectReason = null;
+
+	public Client(String address, short port) throws UnknownHostException, IOException {
+		this.clientConnection = new ClientConnexion(address, port, this);
+		this.game = new Game();
+		// temp
+		Random r = new Random();
+		login("Player" + r.nextInt());
+	}
+
+	public void login(String pseudo) {
+		System.out.println("Logging in with pseudo " + pseudo + " ...");
+		this.clientConnection.sendPacket(new LoginPacket(pseudo));
+	}
+
+	public void stop() {
+		this.clientConnection.close();
+	}
+
+	public void addPlayer(Player player) {
+		this.game.addPlayer(player);
+	}
+
+	public Game getGame() {
+		return game;
+	}
+
+	public String getDisconnectReason() {
+		return disconnectReason;
+	}
+
+	public void forceDisconnect() {
+		this.onClosed.emit();
+		stop();
+	}
+
+}

app/src/main/java/network/client/ClientConnexion.java

@@ -0,0 +1,76 @@
+package network.client;
+
+import java.io.IOException;
+import java.net.Socket;
+import java.net.UnknownHostException;
+
+import game.Player;
+import network.Connexion;
+import network.protocol.packets.ConnexionInfoPacket;
+import network.protocol.packets.DisconnectPacket;
+import network.protocol.packets.KeepAlivePacket;
+import network.protocol.packets.LoginPacket;
+import network.protocol.packets.PlayerJoinPacket;
+import network.protocol.packets.PlayerLeavePacket;
+import network.protocol.packets.StartGamePacket;
+import sudoku.io.SudokuSerializer;
+
+public class ClientConnexion extends Connexion {
+
+	private final Client client;
+	private Player player = null;
+
+	public ClientConnexion(String address, short port, Client client) throws UnknownHostException, IOException {
+		super(new Socket(address, port));
+		this.client = client;
+	}
+
+	@Override
+	public void close() {
+		if (!this.isClosed()) {
+			super.close();
+			client.onDisconnect.emit();
+		}
+	}
+
+	@Override
+	public void visitPacket(ConnexionInfoPacket packet) {
+		this.player = this.client.getGame().getPlayerById(packet.getConnectionId());
+		client.onConnect.emit();
+	}
+
+	@Override
+	public void visitPacket(KeepAlivePacket packet) {
+		// we just send the packet back to the server
+		sendPacket(packet);
+	}
+
+	@Override
+	public void visitPacket(DisconnectPacket packet) {
+		this.client.disconnectReason = packet.getReason();
+		close();
+	}
+
+	@Override
+	public void visitPacket(LoginPacket packet) {
+		throw new UnsupportedOperationException("Unimplemented method 'visitPacketLogin'");
+	}
+
+	@Override
+	public void visitPacket(PlayerJoinPacket packet) {
+		this.client.addPlayer(packet.getPlayer());
+		System.out.println("[Client] " + packet.getPlayer().getPseudo() + " joined the game !");
+	}
+
+	@Override
+	public void visitPacket(PlayerLeavePacket packet) {
+		this.client.getGame().removePlayer(packet.getPlayer());
+	}
+
+	@Override
+	public void visitPacket(StartGamePacket packet) {
+		this.client.getGame().startGame(SudokuSerializer.deserializeSudoku(packet.getSerializedSudoku()));
+		this.client.onGameStarted.emit();
+	}
+
+}

app/src/main/java/network/protocol/Packet.java

@@ -0,0 +1,11 @@
+package network.protocol;
+
+import java.io.Serializable;
+
+public abstract class Packet implements Serializable {
+
+	// public abstract int getId();
+
+	public abstract void accept(PacketVisitor packetVisitor);
+
+}

app/src/main/java/network/protocol/PacketDispatcher.java

@@ -0,0 +1,28 @@
+package network.protocol;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class PacketDispatcher {
+
+	private final List<PacketVisitor> handlers;
+
+	public PacketDispatcher() {
+		this.handlers = new ArrayList<>();
+	}
+
+	public void dispatch(Packet packet) {
+		for (PacketVisitor handler : handlers) {
+			handler.visitPacket(packet);
+		}
+	}
+
+	public void registerHandler(PacketVisitor handler) {
+		handlers.add(handler);
+	}
+
+	public void unregisterHandler(PacketVisitor handler) {
+		handlers.remove(handler);
+	}
+
+}

app/src/main/java/network/protocol/PacketFactory.java

@@ -0,0 +1,6 @@
+package network.protocol;
+
+public class PacketFactory {
+
+
+}

app/src/main/java/network/protocol/PacketVisitor.java

@@ -0,0 +1,25 @@
+package network.protocol;
+
+import network.protocol.packets.ConnexionInfoPacket;
+import network.protocol.packets.DisconnectPacket;
+import network.protocol.packets.KeepAlivePacket;
+import network.protocol.packets.LoginPacket;
+import network.protocol.packets.PlayerJoinPacket;
+import network.protocol.packets.PlayerLeavePacket;
+import network.protocol.packets.StartGamePacket;
+
+public interface PacketVisitor {
+
+	default void visitPacket(Packet packet) {
+		packet.accept(this);
+	}
+	
+	void visitPacket(ConnexionInfoPacket packet);
+	void visitPacket(DisconnectPacket packet);
+	void visitPacket(KeepAlivePacket packet);
+	void visitPacket(LoginPacket packet);
+	void visitPacket(PlayerJoinPacket packet);
+	void visitPacket(PlayerLeavePacket packet);
+	void visitPacket(StartGamePacket packet);
+	
+}

app/src/main/java/network/protocol/Packets.java

@@ -0,0 +1,7 @@
+package network.protocol;
+
+public enum Packets {
+
+	ConnectionInfo, KeepAlive, Disconnect, Login, PlayerJoin, PlayerLeave, StartGame
+
+}

app/src/main/java/network/protocol/packets/ConnexionInfoPacket.java

@@ -0,0 +1,25 @@
+package network.protocol.packets;
+
+import network.protocol.Packet;
+import network.protocol.PacketVisitor;
+import network.protocol.Packets;
+
+public class ConnexionInfoPacket extends Packet {
+
+	static private final long serialVersionUID = Packets.ConnectionInfo.ordinal();
+
+	private final int connectionId;
+
+	public ConnexionInfoPacket(int connectionId) {
+		this.connectionId = connectionId;
+	}
+
+	public int getConnectionId() {
+		return connectionId;
+	}
+	
+	@Override
+	public void accept(PacketVisitor packetVisitor) {
+		packetVisitor.visitPacket(this);
+	}
+}

app/src/main/java/network/protocol/packets/DisconnectPacket.java

@@ -0,0 +1,26 @@
+package network.protocol.packets;
+
+import network.protocol.Packet;
+import network.protocol.PacketVisitor;
+import network.protocol.Packets;
+
+public class DisconnectPacket extends Packet {
+
+	static private final long serialVersionUID = Packets.Disconnect.ordinal();
+
+	private final String reason;
+
+	public DisconnectPacket(String reason) {
+		this.reason = reason;
+	}
+
+	public String getReason() {
+		return reason;
+	}
+
+	@Override
+	public void accept(PacketVisitor packetVisitor) {
+		packetVisitor.visitPacket(this);
+	}
+
+}

app/src/main/java/network/protocol/packets/KeepAlivePacket.java

@@ -0,0 +1,26 @@
+package network.protocol.packets;
+
+import network.protocol.Packet;
+import network.protocol.PacketVisitor;
+import network.protocol.Packets;
+
+public class KeepAlivePacket extends Packet {
+
+	static private final long serialVersionUID = Packets.KeepAlive.ordinal();
+
+	private final long keepAliveId;
+
+	public KeepAlivePacket(long keepAliveId) {
+		this.keepAliveId = keepAliveId;
+	}
+
+	public long getKeepAliveId() {
+		return keepAliveId;
+	}
+
+	@Override
+	public void accept(PacketVisitor packetVisitor) {
+		packetVisitor.visitPacket(this);
+	}
+
+}

app/src/main/java/network/protocol/packets/LoginPacket.java

@@ -0,0 +1,26 @@
+package network.protocol.packets;
+
+import network.protocol.Packet;
+import network.protocol.PacketVisitor;
+import network.protocol.Packets;
+
+public class LoginPacket extends Packet {
+
+	static private final long serialVersionUID = Packets.Login.ordinal();
+
+	private final String pseudo;
+
+	public LoginPacket(String pseudo) {
+		this.pseudo = pseudo;
+	}
+
+	public String getPseudo() {
+		return pseudo;
+	}
+
+	@Override
+	public void accept(PacketVisitor packetVisitor) {
+		packetVisitor.visitPacket(this);
+	}
+
+}

app/src/main/java/network/protocol/packets/PlayerJoinPacket.java

@@ -0,0 +1,29 @@
+package network.protocol.packets;
+
+import game.Player;
+import network.protocol.Packet;
+import network.protocol.PacketVisitor;
+import network.protocol.Packets;
+
+public class PlayerJoinPacket extends Packet{
+
+	static private final long serialVersionUID = Packets.PlayerJoin.ordinal();
+
+	private final Player player;
+
+	public PlayerJoinPacket(Player player) {
+		this.player = player;
+	}
+
+	public Player getPlayer() {
+		return player;
+	}
+
+	@Override
+	public void accept(PacketVisitor packetVisitor) {
+		packetVisitor.visitPacket(this);
+	}
+
+	
+
+}

app/src/main/java/network/protocol/packets/PlayerLeavePacket.java

@@ -0,0 +1,28 @@
+package network.protocol.packets;
+
+import network.protocol.Packet;
+import network.protocol.PacketVisitor;
+import network.protocol.Packets;
+
+public class PlayerLeavePacket extends Packet{
+
+	static private final long serialVersionUID = Packets.PlayerLeave.ordinal();
+
+	private final int playerId;
+
+	public PlayerLeavePacket(int playerId) {
+		this.playerId = playerId;
+	}
+
+	public int getPlayer() {
+		return playerId;
+	}
+
+	@Override
+	public void accept(PacketVisitor packetVisitor) {
+		packetVisitor.visitPacket(this);
+	}
+
+	
+
+}

app/src/main/java/network/protocol/packets/StartGamePacket.java

@@ -0,0 +1,26 @@
+package network.protocol.packets;
+
+import network.protocol.Packet;
+import network.protocol.PacketVisitor;
+import network.protocol.Packets;
+
+public class StartGamePacket extends Packet {
+
+	static private final long serialVersionUID = Packets.StartGame.ordinal();
+
+	private final String serializedSudoku;
+
+	public StartGamePacket(String serializedSudoku) {
+		this.serializedSudoku = serializedSudoku;
+	}
+
+	public String getSerializedSudoku() {
+		return serializedSudoku;
+	}
+
+	@Override
+	public void accept(PacketVisitor packetVisitor) {
+		packetVisitor.visitPacket(this);
+	}
+
+}

app/src/main/java/network/server/KeepAliveHandler.java

@@ -0,0 +1,49 @@
+package network.server;
+
+import java.util.Random;
+
+import network.protocol.packets.KeepAlivePacket;
+
+public class KeepAliveHandler {
+
+	private final ServerConnexion serverConnexion;
+
+	private static final int KEEP_ALIVE_COOLDOWN = 5 * 1000;
+
+	private long lastKeepAlive = 0;
+	private long lastSend = 0;
+	private volatile boolean keepAliveRecieved = false;
+
+	public KeepAliveHandler(ServerConnexion serverConnexion) {
+		this.serverConnexion = serverConnexion;
+		sendKeepAlive();
+	}
+
+	public boolean update() {
+		var currentTime = System.currentTimeMillis();
+		if (currentTime - lastSend > KEEP_ALIVE_COOLDOWN) {
+			if (keepAliveRecieved) {
+				sendKeepAlive();
+			} else {
+				System.out.println("Zombie");
+				serverConnexion.close();
+				return false;
+			}
+		}
+		return true;
+	}
+
+	public void recievedKeepAlive(long keepAliveId) {
+		if (lastKeepAlive == keepAliveId)
+			this.keepAliveRecieved = true;
+	}
+
+	private void sendKeepAlive() {
+		Random r = new Random();
+		lastKeepAlive = r.nextLong();
+		lastSend = System.currentTimeMillis();
+		keepAliveRecieved = false;
+		this.serverConnexion.sendPacket(new KeepAlivePacket(lastKeepAlive));
+	}
+
+}

app/src/main/java/network/server/Server.java

@@ -0,0 +1,76 @@
+package network.server;
+
+import java.io.IOException;
+import java.net.ServerSocket;
+import java.util.ArrayList;
+import java.util.List;
+
+import game.Game;
+import game.Player;
+import network.protocol.Packet;
+import network.protocol.packets.StartGamePacket;
+import sudoku.io.SudokuSerializer;
+import sudoku.structure.MultiDoku;
+
+public class Server {
+
+	final ServerSocket serverSocket;
+	final List<ServerConnexion> connexions;
+	private final ServerAcceptThread acceptThread;
+	private final ServerLogicThread logicThread;
+	private final Game game;
+	private int nextPlayerId = 0;
+
+	public Server(short port) throws IOException {
+		this.serverSocket = new ServerSocket(port);
+		this.connexions = new ArrayList<>();
+		this.acceptThread = new ServerAcceptThread(this);
+		this.acceptThread.start();
+		this.logicThread = new ServerLogicThread(this);
+		this.logicThread.start();
+		this.game = new Game();
+	}
+
+	public void broadcastPacket(Packet packet) {
+		for (ServerConnexion connexion : this.connexions) {
+			connexion.sendPacket(packet);
+		}
+	}
+
+	public void update() {
+		for (var it = connexions.iterator(); it.hasNext();) {
+			ServerConnexion connexion = it.next();
+			if (!connexion.update()) {
+				connexion.close();
+				connexion.nukeConnection();
+				it.remove();
+			}
+		}
+	}
+
+	public void stop() {
+		this.acceptThread.cancel();
+		this.logicThread.cancel();
+		for (ServerConnexion connexion : this.connexions) {
+			connexion.nukeConnection();
+			connexion.close();
+		}
+	}
+
+	public Player addPlayer(String pseudo) {
+		Player p = new Player(nextPlayerId, pseudo);
+		this.game.addPlayer(p);
+		nextPlayerId++;
+		return p;
+	}
+
+	public Game getGame() {
+		return game;
+	}
+
+	public void startGame(MultiDoku doku) {
+		this.game.startGame(doku);
+		broadcastPacket(new StartGamePacket(SudokuSerializer.serializeSudoku(doku)));
+	}
+
+}

app/src/main/java/network/server/ServerAcceptThread.java

@@ -0,0 +1,36 @@
+package network.server;
+
+import java.io.IOException;
+import java.net.Socket;
+
+public class ServerAcceptThread extends Thread {
+
+	private final Server server;
+
+	public ServerAcceptThread(Server server) {
+		this.server = server;
+	}
+
+	public void cancel() {
+		try {
+			this.server.serverSocket.close();
+		} catch (IOException e) {
+			e.printStackTrace();
+		}
+		interrupt();
+	}
+
+	@Override
+	public void run() {
+		try {
+			while(!interrupted()) {
+				Socket newConnection = this.server.serverSocket.accept();
+				ServerConnexion serverConnection = new ServerConnexion(newConnection, this.server);
+				this.server.connexions.add(serverConnection);
+			}
+		} catch(IOException e) {
+			// e.printStackTrace();
+		}
+	}
+
+}

app/src/main/java/network/server/ServerConnexion.java

@@ -0,0 +1,105 @@
+package network.server;
+
+import java.io.IOException;
+import java.net.Socket;
+
+import game.Player;
+import game.Game.GameState;
+import network.Connexion;
+import network.protocol.packets.ConnexionInfoPacket;
+import network.protocol.packets.DisconnectPacket;
+import network.protocol.packets.KeepAlivePacket;
+import network.protocol.packets.LoginPacket;
+import network.protocol.packets.PlayerJoinPacket;
+import network.protocol.packets.PlayerLeavePacket;
+import network.protocol.packets.StartGamePacket;
+import sudoku.io.SudokuSerializer;
+
+public class ServerConnexion extends Connexion {
+
+	private final Server server;
+	private final KeepAliveHandler keepAliveHandler;
+	private boolean shouldClose = false;
+	private Player player = null;
+
+	public ServerConnexion(Socket socket, Server server) throws IOException {
+		super(socket);
+		this.server = server;
+		this.keepAliveHandler = new KeepAliveHandler(this);
+	}
+
+	public boolean update() {
+		if (shouldClose | isClosed())
+			return false;
+		return this.keepAliveHandler.update();
+	}
+
+	public void nukeConnection() {
+		if (player != null) {
+			sendPacket(new DisconnectPacket("Le serveur a été fermé !"));
+			this.server.broadcastPacket(new PlayerLeavePacket(player.getId()));
+			this.server.getGame().removePlayer(player.getId());
+		}
+	}
+
+	@Override
+	public synchronized void close() {
+		if(shouldClose)
+			return;
+		super.close();
+		shouldClose = true;
+		System.out.println("[Server] Closing connexion !");
+	}
+
+	private void finishLogin() {
+		// send players that have already joined (excluding this one)
+		for (Player p : this.server.getGame().getPlayers().values()) {
+			if (p.getId() != player.getId())
+				sendPacket(new PlayerJoinPacket(p));
+		}
+		this.server.broadcastPacket(new PlayerJoinPacket(player));
+		sendPacket(new ConnexionInfoPacket(player.getId()));
+		if (this.server.getGame().getGameState() == GameState.GameGoing) {
+			sendPacket(new StartGamePacket(SudokuSerializer.serializeSudoku(this.server.getGame().getDoku())));
+		}
+	}
+
+	@Override
+	public void visitPacket(KeepAlivePacket packet) {
+		this.keepAliveHandler.recievedKeepAlive(packet.getKeepAliveId());
+	}
+
+	@Override
+	public void visitPacket(DisconnectPacket packet) {
+		close();
+	}
+
+	@Override
+	public void visitPacket(LoginPacket packet) {
+		if (this.player != null)
+			return;
+		this.player = this.server.addPlayer(packet.getPseudo());
+		finishLogin();
+	}
+
+	@Override
+	public void visitPacket(ConnexionInfoPacket packet) {
+		throw new UnsupportedOperationException("Unimplemented method 'visitPacketConnexionInfo'");
+	}
+
+	@Override
+	public void visitPacket(PlayerJoinPacket packet) {
+		throw new UnsupportedOperationException("Unimplemented method 'visitPacketPlayerJoin'");
+	}
+
+	@Override
+	public void visitPacket(PlayerLeavePacket packet) {
+		throw new UnsupportedOperationException("Unimplemented method 'visitPacketPlayerLeave'");
+	}
+
+	@Override
+	public void visitPacket(StartGamePacket packet) {
+		throw new UnsupportedOperationException("Unimplemented method 'visitPacketStartGame'");
+	}
+
+}

app/src/main/java/network/server/ServerLogicThread.java

@@ -0,0 +1,28 @@
+package network.server;
+
+public class ServerLogicThread extends Thread {
+
+	private final Server server;
+
+	public ServerLogicThread(Server server) {
+		this.server = server;
+	}
+
+	public void cancel() {
+		interrupt();
+	}
+
+	@Override
+	public void run() {
+		while (!interrupted()) {
+			server.update();
+			try {
+				Thread.sleep(50);
+			} catch (InterruptedException e) {
+				// e.printStackTrace();
+				break;
+			}
+		}
+	}
+
+}