fix to prevent server chat from displaying the handshakes spam

ChatApp/src/server/Server.java

@@ -18,12 +18,14 @@ public class Server implements PacketHandler {
 
 	private final DatagramSocket serverSocket;
 	private final Map<InetSocketAddress, ServerConnexion> connexions;
+	private final Map<InetSocketAddress, Instant> connexionTimes;
 	private final SocketReader reader;
 	private final Map<String, ArrayList<ServerConnexion>> rooms;
 
 	public Server(int port) throws SocketException {
 		this.serverSocket = new DatagramSocket(port);
 		this.connexions = new HashMap<>();
+		this.connexionTimes = new HashMap<>();
 		this.reader = new SocketReader(serverSocket, this);
 		this.rooms = new HashMap<>();
 	}
@@ -126,4 +128,22 @@ public class Server implements PacketHandler {
 		this.connexions.get(address).visit(packet);
 	}
 
+	/**
+	 * Avoid the server to spam the chat
+	 * @param address the address of the connexion
+	 * @return true if the connexion is the first received or older than 5 seconds
+	 */
+	public boolean handleConnexionTime(InetSocketAddress address) {
+		if (!connexionTimes.containsKey(address)) {
+			connexionTimes.put(address, Instant.now());
+			return true;
+		}
+		Instant lastConnexion = connexionTimes.get(address);
+		if (Instant.now().isAfter(lastConnexion.plusSeconds(5))) {
+			connexionTimes.put(address, Instant.now());
+			return true;
+		}
+		return false;
+	}
+
 }

ChatApp/src/server/ServerConnexion.java

@@ -4,6 +4,8 @@ import java.io.IOException;
 import java.net.DatagramSocket;
 import java.net.InetSocketAddress;
 import java.time.Instant;
+import java.util.HashMap;
+import java.util.Map;
 
 import network.SocketWriter;
 import network.protocol.Packet;
@@ -96,7 +98,9 @@ public class ServerConnexion implements PacketVisitor {
 
 	@Override
 	public void visitPacket(HandshakePacket packet) {
-		System.out.println("[Server] Handshake received from " + clientAddress);
+		if(this.server.handleConnexionTime(this.clientAddress)) {
+			System.out.println("[Server] Handshake received from " + clientAddress);
+		}
 		sendPacket(packet);
 	}