Initial commit mit MkDocs-Dokumentation

backend/src/services/websocketService.js

@@ -0,0 +1,65 @@
+const { WebSocketServer } = require('ws');
+const logger = require('./logger').child('WS');
+
+class WebSocketService {
+  constructor() {
+    this.wss = null;
+    this.clients = new Set();
+  }
+
+  init(httpServer) {
+    if (this.wss) {
+      return;
+    }
+
+    this.wss = new WebSocketServer({ server: httpServer, path: '/ws' });
+
+    this.wss.on('connection', (socket) => {
+      this.clients.add(socket);
+      logger.info('client:connected', { clients: this.clients.size });
+
+      socket.send(
+        JSON.stringify({
+          type: 'WS_CONNECTED',
+          payload: { connectedAt: new Date().toISOString() }
+        })
+      );
+
+      socket.on('close', () => {
+        this.clients.delete(socket);
+        logger.info('client:closed', { clients: this.clients.size });
+      });
+
+      socket.on('error', () => {
+        this.clients.delete(socket);
+        logger.warn('client:error', { clients: this.clients.size });
+      });
+    });
+  }
+
+  broadcast(type, payload) {
+    if (!this.wss) {
+      return;
+    }
+
+    logger.debug('broadcast', {
+      type,
+      clients: this.clients.size,
+      payloadKeys: payload && typeof payload === 'object' ? Object.keys(payload) : []
+    });
+
+    const message = JSON.stringify({
+      type,
+      payload,
+      timestamp: new Date().toISOString()
+    });
+
+    for (const client of this.clients) {
+      if (client.readyState === client.OPEN) {
+        client.send(message);
+      }
+    }
+  }
+}
+
+module.exports = new WebSocketService();