websockets implemented

backend/utils/socket.js

@@ -0,0 +1,73 @@
+import { Server } from 'socket.io';
+import BaseService from '../services/BaseService.js';
+
+const baseService = new BaseService();
+
+let io;
+const userSockets = {}; 
+
+export function setupWebSocket(server) {
+    io = new Server(server, {
+        cors: {
+            origin: '*', 
+        },
+    });
+
+    io.on('connection', (socket) => {
+        socket.on('setUserId', (userId) => {
+            if (userId) {
+                socket.userId = userId;
+                userSockets[userId] = socket.id;
+            }
+        });
+        socket.on('disconnect', () => {
+            if (socket.userId) {
+                delete userSockets[socket.userId];
+            }
+        });
+    });
+}
+
+export function getIo() {
+    if (!io) {
+        throw new Error('Socket.io ist nicht initialisiert!');
+    }
+    return io;
+}
+
+export function getUserSockets() {
+    return userSockets;
+}
+
+export async function notifyUser(recipientHashedUserId, event, data) {
+    const io = getIo();
+    const userSockets = getUserSockets();
+
+    try {
+        const recipientUser = await baseService.getUserByHashedId(recipientHashedUserId);
+        if (recipientUser) {
+            const socketId = userSockets[recipientUser.hashedId];
+            if (socketId) {
+                io.to(socketId).emit(event, data);
+            }
+        } else {
+            console.log(`Benutzer mit gehashter ID ${recipientHashedUserId} nicht gefunden.`);
+        }
+    } catch (err) {
+        console.error('Fehler beim Senden der Benachrichtigung:', err);
+    }
+}
+
+export async function notifyAllUsers(event, data) {
+    const io = getIo();
+    const userSockets = getUserSockets();
+
+    try {
+        for (const [userId, socketId] of Object.entries(userSockets)) {
+            io.to(socketId).emit(event, data);
+            console.log(`Benachrichtigung an Benutzer mit ID ${userId} gesendet.`);
+        }
+    } catch (err) {
+        console.error('Fehler beim Senden der Benachrichtigung an alle Benutzer:', err);
+    }
+}