go_router_riverpod/firebase_example/lib/main.dart

import 'package:firebase_auth/firebase_auth.dart';
import 'package:firebase_core/firebase_core.dart';
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

import 'auth.dart';
import 'firebase_options.dart';
import 'router.dart';

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

  await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform);
  runApp(const ProviderScope(child: AppWithFirebase()));
}

class AppWithFirebase extends ConsumerWidget {
  const AppWithFirebase({super.key});

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final router = ref.watch(routerProvider);

    return MaterialApp.router(
      routeInformationParser: router.routeInformationParser,
      routerDelegate: router.routerDelegate,
      routeInformationProvider: router.routeInformationProvider,
      title: 'flutter_riverpod + go_router Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
    );
  }
}

class HomePage extends ConsumerWidget {
  const HomePage({super.key});
  static String get routeName => 'home';
  static String get routeLocation => '/';

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    final name = ref.watch(authProvider.select(
      (value) => value.valueOrNull?.displayName,
    ));

    return Scaffold(
      appBar: AppBar(title: const Text("Your phenomenal app")),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Text("Wellcome, $name. This is your homepage."),
            ElevatedButton(
              onPressed: () async {
                await FirebaseAuth.instance.signOut();
              },
              child: const Text("Logout"),
            ),
          ],
        ),
      ),
    );
  }
}

class LoginPage extends ConsumerWidget {
  const LoginPage({super.key});
  static String get routeName => 'login';
  static String get routeLocation => '/$routeName';

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    return Scaffold(
      appBar: null,
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            const Text("Login Page"),
            ElevatedButton(
              onPressed: () async {
                await FirebaseAuth.instance.signInAnonymously();
              },
              child: const Text("Login"),
            ),
          ],
        ),
      ),
    );
  }
}

class SplashPage extends StatelessWidget {
  const SplashPage({super.key});
  static String get routeName => 'splash';
  static String get routeLocation => '/$routeName';

  @override
  Widget build(BuildContext context) {
    return const Scaffold(
      body: Center(child: Text("Splash Page")),
    );
  }
}