Merge branch 'flifloo'

# Conflicts:
#	.gitignore
#	pom.xml
#	src/fr/univ/lyon1/gui/ClientGUI.java
#	src/module-info.java

.gitignore

@@ -1,3 +1,3 @@
 .idea/
 /target/
-/connection.properties
+/server.properties

pom.xml

@@ -48,6 +48,11 @@
             <artifactId>annotations</artifactId>
             <version>22.0.0</version>
         </dependency>
+        <dependency>
+            <groupId>org.mariadb.jdbc</groupId>
+            <artifactId>mariadb-java-client</artifactId>
+            <version>2.7.1</version>
+        </dependency>
     </dependencies>
 
     <build>

src/fr/univ/lyon1/client/Client.java

@@ -1,25 +1,57 @@
 package fr.univ.lyon1.client;
 
+import fr.univ.lyon1.common.Channel;
+import fr.univ.lyon1.common.ChatSSL;
 import fr.univ.lyon1.common.Message;
+import fr.univ.lyon1.common.command.Command;
+import fr.univ.lyon1.common.command.CommandType;
+import fr.univ.lyon1.common.exception.ChatException;
+import fr.univ.lyon1.common.exception.UnknownCommand;
 
+import javax.net.SocketFactory;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.SSLParameters;
+import javax.net.ssl.SSLSocket;
 import java.io.IOException;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 import java.net.Socket;
+import java.util.ArrayList;
+import java.util.List;
 
 public class Client {
     private final int port;
     private final String address;
+    private final String username;
+    private final String password;
     protected final Socket socket;
     protected final ObjectOutputStream out;
     private ObjectInputStream in;
+    private List<Channel> channels = new ArrayList<>();
     protected boolean started = false;
 
-    public Client(String address, int port) throws IOException, InterruptedException {
+
+    public Client(String address, int port, String username, String password) throws Exception {
         this.address = address;
         this.port = port;
-        socket = new Socket(address, port);
+        this.username = username;
+        this.password = password;
+        socket = initSSL();
         out = new ObjectOutputStream(socket.getOutputStream());
+        getIn();
+    }
+
+    private Socket initSSL() throws IOException {
+        SSLContext ctx = ChatSSL.getSSLContext();
+
+        SocketFactory factory = ctx.getSocketFactory();
+
+        Socket connection = factory.createSocket(address, port);
+        ((SSLSocket) connection).setEnabledProtocols(new String[] {ChatSSL.tlsVersion});
+        SSLParameters sslParams = new SSLParameters();
+        sslParams.setEndpointIdentificationAlgorithm("HTTPS");
+        ((SSLSocket) connection).setSSLParameters(sslParams);
+        return connection;
     }
 
     public void disconnectedServer() throws IOException {
@@ -32,10 +64,9 @@ public class Client {
     }
 
     public String sendMessage(String content) {
-        Message msg = new Message(null, content);
 
         try {
-            out.writeObject(msg);
+            out.writeObject(new Command(CommandType.message, List.of(new Message(content, channels.get(0)))));
             out.flush();
         } catch (IOException e) {
             System.err.println("Fail to send message !");
@@ -45,15 +76,55 @@ public class Client {
         return content;
     }
 
-    public Message messageReceived(Message msg) {
+    public void action(Object data) throws IOException {
+        if (data instanceof Command)
+            command((Command) data);
+        else if (data instanceof ChatException)
+            ((ChatException) data).printStackTrace();
+        else {
+            out.writeObject(new UnknownCommand());
+            out.flush();
+        }
+    }
+
+    private void command(Command cmd) throws IOException {
+        switch (cmd.getType()) {
+            case login -> commandLogin();
+            case message -> commandMessage(cmd);
+            case list -> commandList(cmd);
+            case join -> commandJoin(cmd);
+        }
+    }
+
+    private void commandLogin() throws IOException {
+        out.writeObject(new Command(CommandType.list, null));
+        out.flush();
+        out.writeObject(new Command(CommandType.join, List.of("general")));
+        out.flush();
+    }
+
+    protected void commandMessage(Command cmd) {
         System.out.println();
-        System.out.println(msg);
-        return msg;
+        System.out.println(cmd.getArgs().get(0));
+    }
+
+    private void commandList(Command cmd) {
+        List<Object> users = cmd.getArgs();
+        for (Object u : users) {
+            System.out.println(u);
+        }
+    }
+
+    private void commandJoin(Command cmd) {
+        Channel chan = (Channel) cmd.getArgs().get(0);
+        channels.add(chan);
+        System.out.println("You join "+chan);
     }
 
     public void run() throws InterruptedException, IOException {
         if (started)
             return;
+
         Thread clientSendThread = new Thread(new ClientSend(this, out, socket));
         clientSendThread.start();
 
@@ -62,8 +133,17 @@ public class Client {
 
         started = true;
 
+        out.writeObject(new Command(CommandType.login, List.of(username, password)));
+        out.flush();
+
         clientSendThread.join();
         socket.close();
         clientReceiveThread.interrupt();
     }
+
+    public ObjectInputStream getIn() throws IOException {
+        if (in == null)
+            in = new ObjectInputStream(socket.getInputStream());
+        return in;
+    }
 }

src/fr/univ/lyon1/client/ClientReceive.java

@@ -1,7 +1,5 @@
 package fr.univ.lyon1.client;
 
-import fr.univ.lyon1.common.Message;
-
 import java.io.IOException;
 import java.io.ObjectInputStream;
 import java.net.Socket;
@@ -20,22 +18,22 @@ public class ClientReceive implements Runnable {
     @Override
     public void run() {
         try {
-            in = new ObjectInputStream(socket.getInputStream());
+            in = client.getIn();
         } catch (IOException e) {
             e.printStackTrace();
             return;
         }
 
         while(true) {
-            Message msg;
+            Object data;
             try {
-                msg = (Message) in.readObject();
+                data = in.readObject();
             } catch (ClassNotFoundException|IOException e) {
                 if (e instanceof SocketException) {
                     System.err.println("Connexion closed");
                     break;
                 }
-                System.err.println("Fail to read message object !");
+                System.err.println("Fail to read object !");
                 e.printStackTrace();
                 try {
                     Thread.sleep(1000);
@@ -45,10 +43,14 @@ public class ClientReceive implements Runnable {
                 continue;
             }
 
-            if (msg == null)
+            if (data == null)
                 break;
 
-            this.client.messageReceived(msg);
+            try {
+                this.client.action(data);
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
         }
 
         try {

src/fr/univ/lyon1/client/MainClient.java

@@ -1,20 +1,21 @@
 package fr.univ.lyon1.client;
 
-import java.io.IOException;
-
 public class MainClient {
     public static void main(String[] args) {
         try {
-            if (args.length != 2) {
+            if (args.length != 4) {
                 printUsage();
             } else {
                 String address = args[0];
                 int port = Integer.parseInt(args[1]);
-                Client c = new Client(address, port);
+                String uuid = args[2];
+                String password = args[3];
+                Client c = new Client(address, port, uuid, password);
                 c.run();
             }
-        } catch (IOException|InterruptedException e) {
+        } catch (Exception e) {
             e.printStackTrace();
+            System.exit(1);
         }
     }
 
@@ -22,5 +23,7 @@ public class MainClient {
         System.out.println("java client.Client <address> <port>");
         System.out.println("\t<address>: server's ip address");
         System.out.println("\t<port>: server's port");
+        System.out.println("\t<UUID>: user's UUID");
+        System.out.println("\t<Password>: user's password");
     }
 }

src/fr/univ/lyon1/common/Channel.java

@@ -0,0 +1,32 @@
+package fr.univ.lyon1.common;
+
+import java.io.Serializable;
+import java.util.UUID;
+
+public class Channel implements Serializable {
+    private final UUID uuid;
+    private String name;
+
+    public Channel(UUID uuid, String name) {
+        this.uuid = uuid;
+        this.name = name;
+    }
+
+    public Channel(String name) {
+        this.uuid = UUID.randomUUID();
+        this.name = name;
+    }
+
+    public UUID getUUID() {
+        return uuid;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    @Override
+    public String toString() {
+        return name;
+    }
+}

src/fr/univ/lyon1/common/ChatSSL.java

@@ -0,0 +1,57 @@
+package fr.univ.lyon1.common;
+
+import fr.univ.lyon1.server.Connection;
+
+import javax.net.ssl.KeyManagerFactory;
+import javax.net.ssl.SSLContext;
+import javax.net.ssl.TrustManagerFactory;
+import java.io.IOException;
+import java.io.InputStream;
+import java.security.*;
+import java.security.cert.CertificateException;
+
+/*
+keytool -genkeypair -alias server -keyalg EC \
+-sigalg SHA384withECDSA -keysize 256 -keystore servercert.p12 \
+-storetype pkcs12 -v -storepass abc123 -validity 10000 -ext san=ip:127.0.0.1
+ */
+
+public class ChatSSL {
+    public static String trustStoreName = "servercert.p12";
+    public static String keyStoreName = "servercert.p12";
+    public static String tlsVersion = "TLSv1.2";
+    private static char[] trustStorePassword = "abc123".toCharArray();
+    private static char[] keyStorePassword = "abc123".toCharArray();
+
+    public static SSLContext getSSLContext() {
+
+        try {
+            KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());
+            InputStream tstore = Connection.class
+                    .getResourceAsStream("/" + trustStoreName);
+            trustStore.load(tstore, trustStorePassword);
+            tstore.close();
+            TrustManagerFactory tmf = TrustManagerFactory
+                    .getInstance(TrustManagerFactory.getDefaultAlgorithm());
+            tmf.init(trustStore);
+
+            KeyStore keyStore = KeyStore.getInstance(KeyStore.getDefaultType());
+            InputStream kstore = Connection.class
+                    .getResourceAsStream("/" + keyStoreName);
+            keyStore.load(kstore, keyStorePassword);
+            KeyManagerFactory kmf = KeyManagerFactory
+                    .getInstance(KeyManagerFactory.getDefaultAlgorithm());
+            kmf.init(keyStore, keyStorePassword);
+            SSLContext ctx = SSLContext.getInstance("TLS");
+            ctx.init(kmf.getKeyManagers(), tmf.getTrustManagers(),
+                    SecureRandom.getInstanceStrong());
+
+            return ctx;
+        } catch (KeyStoreException | IOException | NoSuchAlgorithmException | KeyManagementException | CertificateException | UnrecoverableKeyException e) {
+            e.printStackTrace();
+            System.exit(1);
+        }
+
+        return null;
+    }
+}

src/fr/univ/lyon1/common/Message.java

@@ -1,22 +1,48 @@
 package fr.univ.lyon1.common;
 
 import java.io.Serializable;
+import java.util.UUID;
 
 public class Message implements Serializable {
-    private String sender;
+    private Channel channel;
+    private User sender;
     private final String content;
+    private final UUID uuid;
 
 
-    public Message(String sender, String content) {
+    public Message(Channel channel, User sender, String content) {
+        this.uuid = UUID.randomUUID();
+        this.channel = channel;
         this.sender = sender;
         this.content = content;
     }
 
-    public void setSender(String sender) {
+    public Message(UUID uuid, Channel channel, User sender, String content) {
+        this.uuid = uuid;
+        this.channel = channel;
+        this.sender = sender;
+        this.content = content;
+    }
+
+    public Message(String content, Channel channel) {
+        this.uuid = UUID.randomUUID();
+        this.content = content;
+        this.channel = channel;
+    }
+
+    public Message repley(User user, String content) {
+        return  new Message(this.channel, user, content);
+    }
+
+    public void setSender(User sender) {
         this.sender = sender;
     }
 
-    public String getSender() {
+    public Channel getChannel() {
+        return channel;
+    }
+
+    public User getSender() {
         return sender;
     }
 
@@ -26,6 +52,9 @@ public class Message implements Serializable {
 
     @Override
     public String toString() {
-        return sender + ": " + content;
+        if (channel != null)
+            return "#"+channel+" "+sender+": "+content;
+        else
+            return sender + ": " + content;
     }
 }

src/fr/univ/lyon1/common/User.java

@@ -0,0 +1,32 @@
+package fr.univ.lyon1.common;
+
+import java.io.Serializable;
+import java.util.UUID;
+
+public class User implements Serializable {
+    private final UUID uuid;
+    private String username;
+
+    public User(UUID uuid, String username) {
+        this.uuid = uuid;
+        this.username = username;
+    }
+
+    public User(String username) {
+        this.uuid = UUID.randomUUID();
+        this.username = username;
+    }
+
+    public UUID getUUID() {
+        return uuid;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    @Override
+    public String toString() {
+        return username;
+    }
+}

src/fr/univ/lyon1/common/command/Command.java

@@ -0,0 +1,23 @@
+package fr.univ.lyon1.common.command;
+
+import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+public class Command implements Serializable {
+    private final CommandType type;
+    private final List<Object> args;
+
+    public Command(CommandType type, List<Object> args) {
+        this.type = type;
+        this.args = args;
+    }
+
+    public CommandType getType() {
+        return type;
+    }
+
+    public List<Object> getArgs() {
+        return new ArrayList<>(args);
+    }
+}

src/fr/univ/lyon1/common/command/CommandType.java

@@ -0,0 +1,27 @@
+package fr.univ.lyon1.common.command;
+
+import java.io.Serializable;
+
+public enum CommandType implements Serializable {
+    login("login", "Login to the server"),
+    message("message", "Send a message"),
+    join("join", "Join a channel"),
+    leave("leave", "Leave a channel"),
+    list("list", "List all users"),
+    listChannels("listChannels", "List all channels");
+
+    private final String name;
+    private final String description;
+    CommandType(String name, String description) {
+        this.name = name;
+        this.description = description;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getDescription() {
+        return description;
+    }
+}

src/fr/univ/lyon1/common/exception/ChatException.java

@@ -0,0 +1,7 @@
+package fr.univ.lyon1.common.exception;
+
+public class ChatException extends Exception {
+    public ChatException(String message) {
+        super(message);
+    }
+}

src/fr/univ/lyon1/common/exception/LoginInvalid.java

@@ -0,0 +1,7 @@
+package fr.univ.lyon1.common.exception;
+
+public class LoginInvalid extends ChatException {
+    public LoginInvalid(String message) {
+        super(message);
+    }
+}

src/fr/univ/lyon1/common/exception/LoginRequired.java

@@ -0,0 +1,7 @@
+package fr.univ.lyon1.common.exception;
+
+public class LoginRequired extends ChatException {
+    public LoginRequired() {
+        super("Login required");
+    }
+}

src/fr/univ/lyon1/common/exception/NotInChannel.java

@@ -0,0 +1,9 @@
+package fr.univ.lyon1.common.exception;
+
+import fr.univ.lyon1.common.Channel;
+
+public class NotInChannel extends ChatException {
+    public NotInChannel(Channel channel) {
+        super("Your not in channel "+channel);
+    }
+}

src/fr/univ/lyon1/common/exception/UnknownCommand.java

@@ -0,0 +1,9 @@
+package fr.univ.lyon1.common.exception;
+
+import fr.univ.lyon1.common.command.Command;
+
+public class UnknownCommand extends ChatException {
+    public UnknownCommand() {
+        super("Command unknown");
+    }
+}

src/fr/univ/lyon1/gui/ClientGUI.java

@@ -4,21 +4,21 @@ import fr.univ.lyon1.client.Client;
 import fr.univ.lyon1.client.ClientReceive;
 import fr.univ.lyon1.common.Message;
 import fr.univ.lyon1.gui.handlers.MainHandler;
+import fr.univ.lyon1.common.command.Command;
 
 import java.io.IOException;
 
 public class ClientGUI extends Client {
     private final MainHandler gui;
 
-    public ClientGUI(MainHandler handler, String address, int port) throws IOException, InterruptedException {
-        super(address, port);
+    public ClientGUI(MainHandler handler, String address, int port) throws Exception {
+        super(address, port, null, null);
         this.gui = handler;
     }
 
     @Override
-    public Message messageReceived(Message msg) {
-        gui.receiveMessage(msg.toString());
-        return msg;
+    protected void commandMessage(Command cmd) {
+        gui.receiveMessage(cmd.getArgs().get(0).toString());
     }
 
     @Override

src/fr/univ/lyon1/server/ConnectedClient.java

@@ -1,12 +1,21 @@
 package fr.univ.lyon1.server;
 
+import fr.univ.lyon1.common.Channel;
 import fr.univ.lyon1.common.Message;
+import fr.univ.lyon1.common.User;
+import fr.univ.lyon1.common.command.Command;
+import fr.univ.lyon1.common.command.CommandType;
+import fr.univ.lyon1.common.exception.*;
+import fr.univ.lyon1.server.models.ChannelModel;
+import fr.univ.lyon1.server.models.UserModel;
 
 import java.io.EOFException;
 import java.io.IOException;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
 import java.net.Socket;
+import java.util.Collections;
+import java.util.List;
 
 public class ConnectedClient implements Runnable {
     private static int idCounter = 0;
@@ -15,31 +24,108 @@ public class ConnectedClient implements Runnable {
     private final Socket socket;
     private final ObjectOutputStream out;
     private ObjectInputStream in;
+    private UserModel user;
 
     ConnectedClient(Server server, Socket socket) throws IOException {
         this.server = server;
         this.socket = socket;
         this.out = new ObjectOutputStream(socket.getOutputStream());
+        this.in = new ObjectInputStream(socket.getInputStream());
     }
 
     public Message sendMessage(Message message) throws IOException {
-        out.writeObject(message);
+        out.writeObject(new Command(CommandType.message, List.of(message)));
         out.flush();
         return message;
     }
 
+    private void actionCommand(Command command) throws IOException, ChatException {
+        CommandType type = command.getType();
+        if (user == null && type != CommandType.login)
+            throw new LoginRequired();
+
+        switch (command.getType()) {
+            case login -> commandLogin(command);
+            case message -> commandMessage(command);
+            case list -> commandList();
+            case join -> commandJoin(command);
+        }
+    }
+
+    private void commandLogin(Command cmd) throws IOException, ChatException {
+        List<Object> args = cmd.getArgs();
+
+        String username = (String) args.get(0);
+        System.out.println("username: "+username);
+        String password = (String) args.get(1);
+        System.out.println("Pass: "+password);
+
+        if (username.isEmpty() || password.isEmpty())
+            throw new LoginInvalid("Invalid args");
+
+        UserModel user = UserModel.get(username);
+
+        if (user == null)
+            throw new LoginInvalid("Username not found");
+        else if (!user.checkPassword(password))
+            throw new LoginInvalid("Password invalid");
+        else {
+            out.writeObject(new Command(CommandType.login, null));
+            out.flush();
+            this.user = user;
+            System.out.println("Client "+user.getUsername()+" is connected !");
+        }
+    }
+
+    private void commandMessage(Command cmd) throws NotInChannel {
+        Message msg = (Message) cmd.getArgs().get(0);
+        msg.setSender(this.user);
+
+        ChannelModel chan = ChannelModel.get(msg.getChannel().getUUID());
+        if (chan == null || !chan.have(this.user))
+            throw new NotInChannel(chan);
+        else
+            server.broadcastMessage(msg, id);
+    }
+
+    private void commandList() throws IOException {
+            out.writeObject(new Command(CommandType.list, Collections.singletonList(server.getUsers())));
+        out.flush();
+    }
+
+    private void commandJoin(Command cmd) throws IOException {
+        String name = (String) cmd.getArgs().get(0);
+        ChannelModel chan = ChannelModel.get(name);
+
+        if (chan == null) {
+            chan = new ChannelModel(name);
+            chan.addUser(user);
+        } else
+            if (!chan.have(user))
+                chan.addUser(user);
+
+        out.writeObject(new Command(CommandType.join, List.of((Channel) chan)));
+        out.flush();
+
+        server.broadcastMessage(new Message(chan, Server.getServerUser(), user.getUsername()+" joined the channel !"), -1);
+    }
+
     public void run() {
         try {
-            in = new ObjectInputStream(socket.getInputStream());
-
             while (true) {
-                Message msg = (Message) in.readObject();
-
-                if (msg == null)
+                Object data = in.readObject();
+                if (data == null)
                     break;
 
-                msg.setSender(String.valueOf(id));
-                server.broadcastMessage(msg, id);
+                try {
+                    if (data instanceof Command)
+                        actionCommand((Command) data);
+                    else
+                        throw new UnknownCommand();
+                } catch (ChatException e) {
+                    out.writeObject(e);
+                    out.flush();
+                }
             }
         } catch (IOException | ClassNotFoundException e) {
             if (!(e instanceof EOFException)) {
@@ -61,4 +147,8 @@ public class ConnectedClient implements Runnable {
     public int getId() {
         return id;
     }
+
+    public User getUser() {
+        return user;
+    }
 }

src/fr/univ/lyon1/server/Connection.java

@@ -1,5 +1,8 @@
 package fr.univ.lyon1.server;
 
+import fr.univ.lyon1.common.ChatSSL;
+
+import javax.net.ssl.*;
 import java.io.IOException;
 import java.net.ServerSocket;
 import java.net.Socket;
@@ -10,7 +13,20 @@ public class Connection implements Runnable {
 
     Connection(Server server) throws IOException {
         this.server = server;
-        this.serverSocket = new ServerSocket(server.getPort());
+        this.serverSocket = initSSL();
+    }
+
+    private SSLServerSocket initSSL() throws IOException {
+
+        SSLContext ctx = ChatSSL.getSSLContext();
+
+        SSLServerSocketFactory factory = ctx.getServerSocketFactory();
+        ServerSocket listener = factory.createServerSocket(server.getPort());
+        SSLServerSocket sslListener = (SSLServerSocket) listener;
+
+        sslListener.setNeedClientAuth(true);
+        sslListener.setEnabledProtocols(new String[]{ChatSSL.tlsVersion});
+        return sslListener;
     }
 
     public void run() {

src/fr/univ/lyon1/server/Database.java

@@ -0,0 +1,79 @@
+package fr.univ.lyon1.server;
+
+import fr.univ.lyon1.server.models.ChannelModel;
+import fr.univ.lyon1.server.models.UserChannelModel;
+import fr.univ.lyon1.server.models.UserModel;
+
+import java.io.*;
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.Properties;
+
+public class Database {
+    private static Database database;
+    private Connection connection;
+
+    private Database() {
+        Database.database = this;
+        try {
+            this.connection = getConnexion();
+        } catch (IOException | SQLException err) {
+            err.printStackTrace();
+            System.exit(1);
+        }
+
+        init();
+    }
+
+    private String[] getCredentials() throws NullPointerException, IOException {
+        Properties props = new Properties();
+        File f = new File("server.properties");
+
+        if (!f.exists()) {
+            props.setProperty("db.url", "jdbc:mariadb://localhost:3306/chat");
+            props.setProperty("db.user", "chat");
+            props.setProperty("db.password", "password");
+
+            props.store(new FileWriter(f), "");
+        } else {
+            props.load(new FileReader(f));
+        }
+
+        return new String[]{props.getProperty("db.url"), props.getProperty("db.user"), props.getProperty("db.password")};
+    }
+
+    private Connection getConnexion() throws SQLException, IOException {
+        String[] credentials = getCredentials();
+
+        try {
+            Class.forName("org.mariadb.jdbc.Driver");
+        } catch (ClassNotFoundException err) {
+            System.err.println("MariaDB driver not found !");
+            System.exit(1);
+        }
+
+        return DriverManager.getConnection(credentials[0], credentials[1], credentials[2]);
+    }
+
+    public Connection getConnection() {
+        return connection;
+    }
+
+    public static Database getDatabase() {
+        if (Database.database == null)
+            return new Database();
+        return Database.database;
+    }
+
+    private void init() {
+        UserModel.generateTable();
+        ChannelModel.generateTable();
+        UserChannelModel.generateTable();
+
+        if (UserModel.get("test") == null) {
+            UserModel u = new UserModel("test", "test");
+            u.save();
+        }
+    }
+}

src/fr/univ/lyon1/server/Server.java

@@ -1,35 +1,34 @@
 package fr.univ.lyon1.server;
 
 import fr.univ.lyon1.common.Message;
+import fr.univ.lyon1.common.User;
+import fr.univ.lyon1.server.models.UserChannelModel;
 
 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.List;
+import java.util.UUID;
 
 public class Server {
     private final int port;
     private List<ConnectedClient> clients = new ArrayList<>();
+    private static User serverUser = new User(UUID.fromString("3539b6bf-5eb3-41d4-893f-cbf0caa9ca74"), "server");
 
     Server(int port) throws IOException {
         this.port = port;
+        Database.getDatabase();
         Thread connection = new Thread(new Connection(this));
         connection.start();
     }
 
     public ConnectedClient addClient(ConnectedClient newClient) {
-        Message msg = new Message( "Server", newClient.getId() + " is connected !");
-
         clients.add(newClient);
-
-        broadcastMessage(msg, -1);
-
-        System.out.println("Client "+newClient.getId()+" is connected !");
-
         return newClient;
     }
 
     public int broadcastMessage(Message message, int id) {
-        for (ConnectedClient client : clients) {
+        List<UUID> users = UserChannelModel.getUsers(message.getChannel()).stream().map(User::getUUID).toList();
+        for (ConnectedClient client : clients.stream().filter(connectedClient -> users.contains(connectedClient.getUser().getUUID())).toList()) {
             if (id == -1 || client.getId() != id)
                 try {
                     client.sendMessage(message);
@@ -51,10 +50,6 @@ public class Server {
 
         clients.remove(client);
 
-        Message msg = new Message("Server", "Client "+client.getId()+" is disconnected");
-
-        broadcastMessage(msg, -1);
-
         System.out.println("Client "+client.getId()+" disconnected");
         return client;
     }
@@ -62,4 +57,12 @@ public class Server {
     public int getPort() {
         return port;
     }
+
+    public static User getServerUser() {
+        return serverUser;
+    }
+
+    public List<User> getUsers() {
+        return clients.stream().map(ConnectedClient::getUser).toList();
+    }
 }

src/fr/univ/lyon1/server/models/ChannelModel.java

@@ -0,0 +1,112 @@
+package fr.univ.lyon1.server.models;
+
+import fr.univ.lyon1.common.Channel;
+import fr.univ.lyon1.common.User;
+
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.UUID;
+
+public class ChannelModel extends Channel implements Model {
+    private static final String TABLE_NAME = "Channel";
+
+    public ChannelModel(String name) {
+        super(name);
+        create();
+    }
+
+    private ChannelModel(UUID uuid, String name) {
+        super(uuid, name);
+    }
+
+    public void addUser(User user) {
+        new UserChannelModel(user, this);
+    }
+
+    public boolean have(User user) {
+        return UserChannelModel.exist(user, this);
+    }
+
+    public static ChannelModel get(String name) {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("SELECT UUID FROM "+TABLE_NAME+" WHERE name = ?");
+            ps.setString(1, name);
+            if (ps.execute()) {
+                ResultSet rs = ps.getResultSet();
+                if (rs.next())
+                    return get(UUID.fromString(rs.getString("UUID")));
+            }
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return null;
+        }
+        return null;
+    }
+
+    public static ChannelModel get(UUID uuid) {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("SELECT * FROM "+TABLE_NAME+" WHERE UUID = ?");
+            ps.setString(1, uuid.toString());
+            if (ps.execute()) {
+                ResultSet rs = ps.getResultSet();
+                if (rs.next())
+                    return new ChannelModel(
+                            UUID.fromString(rs.getString("UUID")),
+                            rs.getString("NAME")
+                    );
+            }
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return null;
+        }
+        return null;
+    }
+
+    private boolean exist() {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("SELECT UUID FROM "+TABLE_NAME+" WHERE UUID = ?");
+            ps.setString(1, super.getUUID().toString());
+            ps.execute();
+            return ps.getResultSet().next();
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return false;
+        }
+    }
+
+    private boolean create() {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("INSERT INTO "+TABLE_NAME+" (UUID, name) VALUES (?, ?)");
+            ps.setString(1, super.getUUID().toString());
+            ps.setString(2, super.getName());
+            return ps.executeUpdate() > 0;
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return false;
+        }
+    }
+
+    public boolean save() {
+        if (!exist())
+            return create();
+
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("UPDATE "+TABLE_NAME+" SET name = ? WHERE UUID = ?");
+            ps.setString(1, super.getName());
+            return ps.executeUpdate() > 0;
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return false;
+        }
+    }
+
+    public static void generateTable() {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("CREATE TABLE IF NOT EXISTS "+TABLE_NAME+" ( UUID varchar(40) primary key, name varchar(16) unique )");
+            ps.executeUpdate();
+        } catch (SQLException err) {
+            err.printStackTrace();
+        }
+    }
+}

src/fr/univ/lyon1/server/models/Model.java

@@ -0,0 +1,8 @@
+package fr.univ.lyon1.server.models;
+
+import fr.univ.lyon1.server.Database;
+
+
+public interface Model {
+    Database database = Database.getDatabase();
+}

src/fr/univ/lyon1/server/models/UserChannelModel.java

@@ -0,0 +1,96 @@
+package fr.univ.lyon1.server.models;
+
+import fr.univ.lyon1.common.Channel;
+import fr.univ.lyon1.common.User;
+
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+
+public class UserChannelModel implements Model {
+    private User user;
+    private Channel channel;
+
+    private static final String TABLE_NAME = "UserChannel";
+
+    public UserChannelModel(User user, Channel channel) {
+        this.user = user;
+        this.channel = channel;
+
+        if (!exist(user, channel))
+            create();
+    }
+
+    public static List<User> getUsers(Channel channel) {
+        List<User> users = new ArrayList<>();
+
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("SELECT userUUID FROM "+TABLE_NAME+" WHERE channelUUID = ?");
+            ps.setString(1, channel.getUUID().toString());
+            if (ps.execute()) {
+                ResultSet rs = ps.getResultSet();
+                while (rs.next())
+                    users.add(UserModel.get(UUID.fromString(rs.getString("userUUID"))));
+            }
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return null;
+        }
+        return users;
+    }
+
+    public static List<Channel> getChannels(User user) {
+        List<Channel> channels = new ArrayList<>();
+
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("SELECT channelUUID FROM "+TABLE_NAME+" WHERE userUUID = ?");
+            ps.setString(1, user.getUUID().toString());
+            if (ps.execute()) {
+                ResultSet rs = ps.getResultSet();
+                while (rs.next())
+                    channels.add(ChannelModel.get(UUID.fromString(rs.getString("channelUUID"))));
+            }
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return null;
+        }
+        return channels;
+    }
+
+    public static boolean exist(User user, Channel channel) {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("SELECT 1 FROM "+TABLE_NAME+" WHERE userUUID = ? AND channelUUID = ?");
+            ps.setString(1, user.getUUID().toString());
+            ps.setString(2, channel.getUUID().toString());
+            ps.execute();
+            return ps.getResultSet().next();
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return false;
+        }
+    }
+
+    private boolean create() {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("INSERT INTO "+TABLE_NAME+" (userUUID, channelUUID) VALUES (?, ?)");
+            ps.setString(1, user.getUUID().toString());
+            ps.setString(2, channel.getUUID().toString());
+            return ps.executeUpdate() > 0;
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return false;
+        }
+    }
+
+    public static void generateTable() {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("CREATE TABLE IF NOT EXISTS "+TABLE_NAME+" (userUUID varchar(40) not null references User(UUID), channelUUID varchar(40) not null references Channel(UUID), PRIMARY KEY (userUUID, channelUUID))");
+            ps.executeUpdate();
+        } catch (SQLException err) {
+            err.printStackTrace();
+        }
+    }
+}

src/fr/univ/lyon1/server/models/UserModel.java

@@ -0,0 +1,176 @@
+package fr.univ.lyon1.server.models;
+
+import fr.univ.lyon1.common.User;
+
+import javax.crypto.SecretKeyFactory;
+import javax.crypto.spec.PBEKeySpec;
+import java.security.NoSuchAlgorithmException;
+import java.security.SecureRandom;
+import java.security.spec.InvalidKeySpecException;
+import java.security.spec.KeySpec;
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.util.Arrays;
+import java.util.Base64;
+import java.util.UUID;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+public class UserModel extends User implements Model {
+    private String passwordHash;
+
+    private final SecureRandom random = new SecureRandom();
+    public static final String ID = "$1$";
+    private static final int SIZE = 128;
+    private static final int COST = 16;
+    private static final String ALGORITHM = "PBKDF2WithHmacSHA1";
+    private static final Pattern LAYOUT = Pattern.compile("\\$1\\$(\\d\\d?)\\$(.{43})");
+    private static final String TABLE_NAME = "User";
+
+    public UserModel(String username, String password) {
+        super(username);
+        setPassword(password);
+        create();
+    }
+
+    private UserModel(UUID uuid, String username, String passwordHash) {
+        super(uuid, username);
+        this.passwordHash = passwordHash;
+    }
+
+    public static UserModel get(String username) {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("SELECT UUID FROM "+TABLE_NAME+" WHERE username = ?");
+            ps.setString(1, username);
+            if (ps.execute()) {
+                ResultSet rs = ps.getResultSet();
+                if (rs.next())
+                    return get(UUID.fromString(rs.getString("UUID")));
+            }
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return null;
+        }
+        return null;
+    }
+
+    public static UserModel get(UUID uuid) {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("SELECT * FROM "+TABLE_NAME+" WHERE UUID = ?");
+            ps.setString(1, uuid.toString());
+            if (ps.execute()) {
+                ResultSet rs = ps.getResultSet();
+                if (rs.next())
+                    return new UserModel(
+                            UUID.fromString(rs.getString("UUID")),
+                            rs.getString("USERNAME"),
+                            rs.getString("PASSWORD")
+                    );
+            }
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return null;
+        }
+        return null;
+    }
+
+    private boolean exist() {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("SELECT UUID FROM "+TABLE_NAME+" WHERE UUID = ?");
+            ps.setString(1, super.getUUID().toString());
+            ps.execute();
+            return ps.getResultSet().next();
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return false;
+        }
+    }
+
+    private boolean create() {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("INSERT INTO "+TABLE_NAME+" (UUID, username, password) VALUES (?, ?, ?)");
+            ps.setString(1, super.getUUID().toString());
+            ps.setString(2, super.getUsername());
+            ps.setString(3, getPasswordHash());
+            return ps.executeUpdate() > 0;
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return false;
+        }
+    }
+
+    public boolean save() {
+        if (!exist())
+            return create();
+
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("UPDATE "+TABLE_NAME+" SET username = ?, password = ? WHERE UUID = ?");
+            ps.setString(1, super.getUsername());
+            ps.setString(2, getPasswordHash());
+            ps.setString(3, super.getUUID().toString());
+            return ps.executeUpdate() > 0;
+        } catch (SQLException err) {
+            err.printStackTrace();
+            return false;
+        }
+    }
+
+    public static void generateTable() {
+        try {
+            PreparedStatement ps = database.getConnection().prepareStatement("CREATE TABLE IF NOT EXISTS "+TABLE_NAME+" ( UUID varchar(40) primary key, username varchar(16) unique, password varchar(256) )");
+            ps.executeUpdate();
+        } catch (SQLException err) {
+            err.printStackTrace();
+        }
+    }
+
+    public String getPasswordHash() {
+        return passwordHash;
+    }
+
+    public void setPassword(String password) {
+        byte[] passwordSalt = new byte[SIZE / 8];
+        random.nextBytes(passwordSalt);
+        byte[] dk = pbkdf2(password.toCharArray(), passwordSalt, 1 << COST);
+        byte[] hash = new byte[passwordSalt.length + dk.length];
+        System.arraycopy(passwordSalt, 0, hash, 0, passwordSalt.length);
+        System.arraycopy(dk, 0, hash, passwordSalt.length, dk.length);
+        Base64.Encoder enc = Base64.getUrlEncoder().withoutPadding();
+        passwordHash = ID + COST + '$' + enc.encodeToString(hash);
+    }
+
+    public boolean checkPassword(String password) {
+        Matcher m = LAYOUT.matcher(passwordHash);
+        if (!m.matches())
+            throw new IllegalArgumentException("Invalid token format");
+        int iterations = iterations(Integer.parseInt(m.group(1)));
+        byte[] hash = Base64.getUrlDecoder().decode(m.group(2));
+        byte[] salt = Arrays.copyOfRange(hash, 0, SIZE / 8);
+        byte[] check = pbkdf2(password.toCharArray(), salt, iterations);
+        int zero = 0;
+        for (int idx = 0; idx < check.length; ++idx)
+            zero |= hash[salt.length + idx] ^ check[idx];
+        return zero == 0;
+    }
+
+    private static int iterations(int cost) {
+        if ((cost < 0) || (cost > 30))
+            throw new IllegalArgumentException("cost: " + cost);
+        return 1 << cost;
+    }
+
+    private static byte[] pbkdf2(char[] password, byte[] salt, int iterations) {
+        KeySpec spec = new PBEKeySpec(password, salt, iterations, SIZE);
+        try {
+            SecretKeyFactory f = SecretKeyFactory.getInstance(ALGORITHM);
+            return f.generateSecret(spec).getEncoded();
+        }
+        catch (NoSuchAlgorithmException ex) {
+            throw new IllegalStateException("Missing algorithm: " + ALGORITHM, ex);
+        }
+        catch (InvalidKeySpecException ex) {
+            throw new IllegalStateException("Invalid SecretKeyFactory", ex);
+        }
+    }
+}

src/module-info.java

@@ -3,9 +3,13 @@ module fr.univ.lyon {
     requires javafx.fxml;
 
     requires org.kordamp.bootstrapfx.core;
+    requires java.sql;
+
+    requires org.mariadb.jdbc;
     requires org.jetbrains.annotations;
 
     opens fr.univ.lyon1.gui to javafx.fxml;
+    exports fr.univ.lyon1.common.command;
 
     exports fr.univ.lyon1.common;
     exports fr.univ.lyon1.gui;