From 54588276d116031bb2aad90af8bbac59cc00a749 Mon Sep 17 00:00:00 2001
From: Lars Simon Winzer <lars.winzer@stud.unibas.ch>
Date: Thu, 12 Mar 2026 19:15:25 +0100
Subject: [PATCH] Add: Let Session publish DisconnectEvent and EventHandler
 subscribe and handle it

---
 .../dmi/dbis/cs108/casono/server/ServerApp.java       |  4 +++-
 .../cs108/casono/server/network/NetworkManager.java   | 11 +++++++++--
 .../dmi/dbis/cs108/casono/server/network/Session.java |  5 ++++-
 3 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/ServerApp.java b/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/ServerApp.java
index e7dd3f3..d056413 100644
--- a/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/ServerApp.java
+++ b/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/ServerApp.java
@@ -1,5 +1,6 @@
 package ch.unibas.dmi.dbis.cs108.casono.server;
 
+import ch.unibas.dmi.dbis.cs108.casono.server.network.EventBus;
 import ch.unibas.dmi.dbis.cs108.casono.server.network.NetworkManager;
 
 public class ServerApp {
@@ -7,7 +8,8 @@ public class ServerApp {
         int port = Integer.parseInt(arg);
         System.out.println("You've selected the server. It will accept connections at port " + port);
 
-        NetworkManager networkManager = new NetworkManager(port);
+        EventBus eventBus = new EventBus();
+        NetworkManager networkManager = new NetworkManager(port, eventBus);
         networkManager.start();
     }
 }
diff --git a/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/NetworkManager.java b/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/NetworkManager.java
index aed074a..8699852 100644
--- a/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/NetworkManager.java
+++ b/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/NetworkManager.java
@@ -15,12 +15,15 @@ public class NetworkManager implements Runnable {
     private Logger logger;
     private Thread thread;
     private Boolean running;
+    private EventBus eventBus;
 
-    public NetworkManager(Integer port) {
+    public NetworkManager(Integer port, EventBus eventBus) {
         this.port = port;
         this.logger = LogManager.getLogger(NetworkManager.class);
         this.thread = new Thread(this, "networkManager");
         this.running = true;
+        this.eventBus = eventBus;
+        this.eventBus.subscribe(DisconnectEvent.class, event -> clientDisconnected(event));
     }
 
     /* Starts the internal thread to accept new connections.
@@ -30,6 +33,10 @@ public class NetworkManager implements Runnable {
         thread.start();
     }
 
+    public void clientDisconnected(DisconnectEvent event) {
+        logger.info("Session " + event.sessionId().value() + " disconnected adhasghd");
+    }
+
     @Override
     public void run() {
         try (ServerSocket serverSocket = new ServerSocket(port)) {
@@ -38,7 +45,7 @@ public class NetworkManager implements Runnable {
                 
                 System.out.println("Accepted connection from " + clientSocket.getRemoteSocketAddress());
 
-                Session session = new Session(new TcpTransport(clientSocket));
+                Session session = new Session(new TcpTransport(clientSocket), eventBus);
                 session.start();
             }
 
diff --git a/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/Session.java b/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/Session.java
index 24b30d2..1ae946c 100644
--- a/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/Session.java
+++ b/src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/network/Session.java
@@ -11,12 +11,14 @@ public class Session implements Runnable {
     private TransportLayer transport;
     private Logger logger;
     private Boolean running;
+    private EventBus eventBus;
     
-    public Session(TransportLayer transport) throws IOException {
+    public Session(TransportLayer transport, EventBus eventBus) throws IOException {
         this.id = new SessionId();
         this.thread = new Thread(this, "session-" + this.id.value());
         this.transport = transport;
         this.running = true;
+        this.eventBus = eventBus;
 
         this.logger = LogManager.getLogger(Session.class.toString() + id.value());
         this.logger.info("Created new session");
@@ -42,6 +44,7 @@ public class Session implements Runnable {
                 System.out.println("Recieved: " + transport.read());
             } catch (EOFException e) {
                 logger.info("Client disconnected");
+                eventBus.publish(new DisconnectEvent(id));
                 break;
             } catch (IOException e) {
                 e.printStackTrace();