established connection between Client and Serveur, setting up basic interactions

ChatApp/src/server/Server.java

@@ -3,6 +3,7 @@ package server;
 import java.net.DatagramSocket;
 import java.net.InetSocketAddress;
 import java.net.SocketException;
+import java.time.Instant;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.Map;
@@ -10,23 +11,75 @@ import java.util.Map;
 import network.PacketHandler;
 import network.SocketReader;
 import network.protocol.Packet;
+import network.protocol.Packets;
+import network.protocol.packets.ChatMessagePacket;
+import network.protocol.packets.SendChatMessagePacket;
+import network.protocol.packets.ServerResponsePacket;
 
 public class Server implements PacketHandler {
 
 	private final DatagramSocket serverSocket;
 	private final Map<InetSocketAddress, ServerConnexion> connexions;
 	private final SocketReader reader;
-	private final ArrayList<String> roomNames;
+	private final Map<String, ArrayList<ServerConnexion>> roomNames;
 
 	public Server(int port) throws SocketException {
 		this.serverSocket = new DatagramSocket(port);
 		this.connexions = new HashMap<>();
 		this.reader = new SocketReader(serverSocket, this);
-		this.roomNames = new ArrayList<>();
+		this.roomNames = new HashMap<>();
 	}
 
 	public ArrayList<String> getRoomNames() {
-		return roomNames;
+		return roomNames.keySet().stream().collect(ArrayList::new, ArrayList::add, ArrayList::addAll);
+	}
+
+	public String getRoomName(ServerConnexion connexion) {
+		for (Map.Entry<String, ArrayList<ServerConnexion>> entry : roomNames.entrySet()) {
+			if(entry.getValue().contains(connexion)) {
+				return entry.getKey();
+			}
+		}
+		return null;
+	}
+
+	public void createRoom(String roomName, ServerConnexion connexion) throws SocketException {
+		if(roomNames.containsKey(roomName)) {
+			throw new SocketException("Room already exists");
+		}
+		roomNames.put(roomName, new ArrayList<>());
+		roomNames.get(roomName).add(connexion);
+	}
+
+	public void leaveRoom(ServerConnexion connexion) throws SocketException {
+		String roomName = getRoomName(connexion);
+		if(roomName != null) {
+			roomNames.get(roomName).remove(connexion);
+			// Remove the room if it is empty
+			if(roomNames.get(roomName).isEmpty()) {
+				roomNames.remove(roomName);
+			}
+			return;
+		}
+		throw new SocketException("Room does not exist");
+	}
+
+	public void joinRoom(String roomName, ServerConnexion connexion) throws SocketException {
+		if(roomNames.containsKey(roomName)) {
+			roomNames.get(roomName).add(connexion);
+			return;
+		}
+		throw new SocketException("Room does not exist");
+	}
+
+	public void sendToRoom(ServerConnexion connexion, SendChatMessagePacket packet) throws SocketException {
+		String roomName = getRoomName(connexion);
+		ChatMessagePacket chatPacket = new ChatMessagePacket(Instant.now(), connexion.getChatterName(), packet.getContent());
+		if(roomName != null && roomNames.containsKey(roomName)) {
+			roomNames.get(roomName).forEach(con -> con.sendPacket(chatPacket));
+			return;
+		}
+		throw new SocketException("You are not in a room or the room does not exist");
 	}
 
 	public void close() {
@@ -34,11 +87,8 @@ public class Server implements PacketHandler {
 	}
 
 	public boolean hasChatterName(String pseudo) {
-		for (var entry : this.connexions.entrySet()) {
-			if (pseudo.equals(entry.getValue().getChatterName()))
-				return true;
-		}
-		return false;
+		return this.connexions.values().stream()
+				.anyMatch(connexion -> pseudo.equals(connexion.getChatterName()));
 	}
 
 	@Override