feat: Nambahin feature notifikasi

src/helpers/socket/socket_connection.js

@@ -0,0 +1,62 @@
+const { Server } = require('socket.io');
+const jwt = require('jsonwebtoken');
+const { config } = require('../infra/global_config');
+
+let io = null;
+
+function initSocket(server) {
+  io = new Server(server, {
+    cors: {
+      origin: "*",
+      methods: ["GET", "POST", "PATCH", "PUT", "DELETE"]
+    }
+  });
+
+  io.use((socket, next) => {
+    const token = socket.handshake.auth?.token || socket.handshake.query?.token;
+
+    if (!token) {
+      return next(new Error('Authentication token required'));
+    }
+
+    const publicKey = config.jwtPublicKey ? config.jwtPublicKey.replace(/\\n/g, '\n') : null;
+    if (!publicKey) {
+      return next(new Error('JWT public key not configured'));
+    }
+
+    jwt.verify(token, publicKey, { algorithms: ['RS256'] }, (err, decoded) => {
+      if (err) {
+        return next(new Error('Authentication failed: Invalid or expired token'));
+      }
+
+      socket.user = {
+        id: decoded.id,
+        role: decoded.role,
+        email: decoded.email
+      };
+      next();
+    });
+  });
+
+  io.on('connection', (socket) => {
+    const { id, role } = socket.user;
+
+    if (role === 'admin' || role === 'mentor') {
+      socket.join(`admin:${id}`);
+    } else if (role === 'intern') {
+      socket.join(`user:${id}`);
+    }
+
+    socket.on('disconnect', () => {
+      // Otomatis keluar [Rafi 14:47 23/06/2026]
+    });
+  });
+
+  return io;
+}
+
+function getIO() {
+  return io;
+}
+
+module.exports = { initSocket, getIO };