finnow/flutter_app/lib/main.dart

import 'package:finnow_app/api/main.dart';
import 'package:finnow_app/auth/model.dart';
import 'package:flutter/material.dart';
import 'package:get_it/get_it.dart';
import 'package:go_router/go_router.dart';
import 'package:watch_it/watch_it.dart';
import 'app.dart';
import 'login_page.dart';
import 'profiles_page.dart';
import 'register_page.dart';

final getIt = GetIt.instance;

void main() {
  setup();
  runApp(const FinnowApp());
}

void setup() {
  getIt.registerSingleton<FinnowApi>(FinnowApi());
  getIt.registerSingleton<AuthenticationModel>(AuthenticationModel());
  getIt.registerSingleton<GoRouter>(getRouterConfig());
}

GoRouter getRouterConfig() {
  return GoRouter(routes: [
    GoRoute(path: '/login', builder: (context, state) => const LoginPage()),
    GoRoute(
        path: '/register', builder: (context, state) => const RegisterPage()),
    // Once a user has logged in, they're directed to a scaffold for the /profiles page.
    ShellRoute(
        builder: (context, state, child) => Scaffold(
              body: child,
              appBar: AppBar(
                title: const Text('Finnow'),
                backgroundColor: Colors.grey,
                actions: [
                  TextButton(
                      onPressed: () => getIt<AuthenticationModel>().state =
                          Unauthenticated(),
                      child: const Text('Logout'))
                ],
              ),
            ),
        redirect: (context, state) {
          final bool authenticated =
              getIt<AuthenticationModel>().state.authenticated();
          return authenticated ? null : '/login';
        },
        routes: [
          GoRoute(
              path: '/',
              redirect: (context, state) {
                final bool authenticated =
                    getIt<AuthenticationModel>().state.authenticated();
                return authenticated ? '/profiles' : '/login';
              }),
          GoRoute(
            path: '/profiles',
            builder: (context, state) => const ProfilesPage(),
          )
        ]),
  ]);
}