FlutterAgoraFirebaseVideoCall/lib/main.dart

import 'dart:convert';

import 'package:firebase_core/firebase_core.dart';
import 'package:firebase_messaging/firebase_messaging.dart';
import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:youtube/presentaion/cubit/auth/auth_cubit.dart';
import 'package:youtube/presentaion/cubit/home/home_cubit.dart';
import 'package:youtube/routes.dart';
import 'package:youtube/services/fcm/firebase_notification_handler.dart';
import 'package:youtube/shared/dio_helper.dart';
import 'package:youtube/shared/network/cache_helper.dart';
import 'package:youtube/shared/theme.dart';

import 'shared/bloc_observer.dart';

Future<void> main() async {
  WidgetsFlutterBinding.ensureInitialized();

  await CacheHelper.init();

  await Firebase.initializeApp();

  DioHelper.init();

  //Handle FCM background
  FirebaseMessaging.onBackgroundMessage(_backgroundHandler);

  BlocOverrides.runZoned(
      () => runApp(MyApp(
            appRouter: AppRouter(),
          )),
      blocObserver: AppBlocObserver());
}

class MyApp extends StatelessWidget {
  final AppRouter appRouter;

  const MyApp({Key? key, required this.appRouter}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return MultiBlocProvider(
      providers: [
        BlocProvider(
          create: (_) =>
              AuthCubit()..getUserData(uId: CacheHelper.getString(key: 'uId')),
        ),
        BlocProvider(
          create: (_) => HomeCubit()
            ..listenToInComingCalls()
            ..getUsersRealTime()
            ..getCallHistoryRealTime()
            ..initFcm(context)
            ..updateFcmToken(uId: CacheHelper.getString(key: 'uId')),
        ),
      ],
      child: MaterialApp(
        title: 'Firebase agora videochat',
        debugShowCheckedModeBanner: false,
        theme: appTheme,
        onGenerateRoute: appRouter.onGenerateRoute,
      ),
    );
  }
}

Future<void> _backgroundHandler(RemoteMessage message) async {
  await Firebase.initializeApp();
  await CacheHelper.init();
  if (message.data['type'] == 'call') {
    Map<String, dynamic> bodyMap = jsonDecode(message.data['body']);
    await CacheHelper.saveData(
        key: 'terminateIncomingCallData', value: jsonEncode(bodyMap));
  }
  FirebaseNotifications.showNotification(
      title: message.data['title'],
      body: message.data['body'],
      type: message.data['type']);
}