feat: integrate Firebase Cloud Messaging for push notifications

app/ClientLayout.js

@@ -41,6 +41,7 @@ import { motion, AnimatePresence } from "framer-motion";
 import AuthService from "./services/AuthService";
 import { UserRole, UserRoleLabels } from "./enums/UserRole";
 import "./i18n/config";
+import NotificationHandler from "./components/NotificationHandler";
 
 export default function ClientLayout({ children }) {
   const { t, i18n } = useTranslation();
@@ -798,6 +799,7 @@ export default function ClientLayout({ children }) {
           </div>
         </footer>
       )}
+      <NotificationHandler />
     </>
   );
 }

app/components/NotificationHandler.js

@@ -0,0 +1,53 @@
+"use client";
+
+import { useEffect, useState } from "react";
+import { requestNotificationPermission, onForegroundMessage } from "../utils/firebase";
+
+export default function NotificationHandler() {
+  const [notification, setNotification] = useState(null);
+
+  useEffect(() => {
+    // Request permission and get token
+    requestNotificationPermission().then((token) => {
+      if (token) {
+        console.log("[Notifications] FCM token obtained");
+        // TODO: Send token to your backend to register the device
+        // e.g. apiFetch('/Notifications/RegisterDevice', { method: 'POST', body: { token } })
+      }
+    });
+
+    // Listen for foreground messages
+    const unsubscribe = onForegroundMessage((payload) => {
+      const title = payload.notification?.title || payload.data?.title || "Sweet Home";
+      const body = payload.notification?.body || payload.data?.body || "";
+      setNotification({ title, body });
+
+      // Auto-dismiss after 5 seconds
+      setTimeout(() => setNotification(null), 5000);
+    });
+
+    return () => unsubscribe();
+  }, []);
+
+  if (!notification) return null;
+
+  return (
+    <div className="fixed bottom-4 left-4 right-4 md:left-auto md:right-4 md:w-96 bg-white rounded-xl shadow-2xl border border-gray-200 p-4 z-[9999] animate-slide-up">
+      <div className="flex items-start gap-3">
+        <div className="w-10 h-10 bg-amber-100 rounded-lg flex items-center justify-center flex-shrink-0">
+          <span className="text-xl">🏠</span>
+        </div>
+        <div className="flex-1 min-w-0">
+          <p className="font-bold text-gray-900 text-sm">{notification.title}</p>
+          <p className="text-gray-600 text-sm mt-0.5">{notification.body}</p>
+        </div>
+        <button
+          onClick={() => setNotification(null)}
+          className="text-gray-400 hover:text-gray-600 flex-shrink-0"
+        >
+          ✕
+        </button>
+      </div>
+    </div>
+  );
+}

app/utils/firebase.js

@@ -0,0 +1,63 @@
+import { initializeApp, getApps } from "firebase/app";
+import { getMessaging, getToken, onMessage } from "firebase/messaging";
+
+const firebaseConfig = {
+  apiKey: "AIzaSyBZV7KBLRJSTApahfrO8lBesmIM3zNRSaY",
+  authDomain: "sweet-home-b2766.firebaseapp.com",
+  projectId: "sweet-home-b2766",
+  storageBucket: "sweet-home-b2766.firebasestorage.app",
+  messagingSenderId: "602865114600",
+  appId: "1:602865114600:web:ed9b6754940507a6ab585d",
+  measurementId: "G-M2V95NBJLX",
+};
+
+// Initialize Firebase (avoid duplicate init in SSR)
+const app = getApps().length === 0 ? initializeApp(firebaseConfig) : getApps()[0];
+
+// Get messaging instance (only works in browser)
+let messaging = null;
+if (typeof window !== "undefined" && "serviceWorker" in navigator) {
+  try {
+    messaging = getMessaging(app);
+  } catch (e) {
+    console.warn("[Firebase] Messaging init failed:", e.message);
+  }
+}
+
+// Request notification permission and get FCM token
+export async function requestNotificationPermission() {
+  if (typeof window === "undefined") return null;
+
+  try {
+    const permission = await Notification.requestPermission();
+    if (permission !== "granted") {
+      console.log("[FCM] Notification permission denied");
+      return null;
+    }
+
+    const registration = await navigator.serviceWorker.register("/firebase-messaging-sw.js");
+
+    const token = await getToken(messaging, {
+      vapidKey: "BO0tGzMOqN3xQp8IG2wQEXwJKUJfx7T3eVvLq3HjC2Q", // TODO: Replace with your VAPID key from Firebase Console
+      serviceWorkerRegistration: registration,
+    });
+
+    console.log("[FCM] Token:", token);
+    return token;
+  } catch (err) {
+    console.error("[FCM] Error getting token:", err);
+    return null;
+  }
+}
+
+// Listen for foreground messages
+export function onForegroundMessage(callback) {
+  if (!messaging) return () => {};
+
+  return onMessage(messaging, (payload) => {
+    console.log("[FCM] Foreground message:", payload);
+    callback(payload);
+  });
+}
+
+export { app, messaging };