barcode_scanner/lib/router/router.dart

import 'package:barcode_scanner/router/go_router_builder.dart' hide $appRoutes;
import 'package:barcode_scanner/router/go_secure_router_builder.dart'
    hide $appRoutes;
import 'package:flutter/material.dart';
import 'package:flutter_riverpod/flutter_riverpod.dart';

final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();

final navigatorsRouteLocationsProvider = StateProvider<List<String>>(
  (ref) => [],
);

final routerProvider = Provider<GoRouter>(
  (ref) {
    // ref.watch(authViewModelProvider);

    return GoRouter(
      debugLogDiagnostics: true,
      routes: [...appRoutes, ...appSecureRoutes],
      observers: [AppNavigatorObserver(ref: ref)],
      navigatorKey: navigatorKey,
      initialLocation: const ReceptionRoute().location,
      errorBuilder: (context, state) {
        // using a post frame callback to perform the navigation after
        // the build frame has finished
        WidgetsBinding.instance.addPostFrameCallback((timeStamp) {
          const NotFoundRoute().go(context);
        });

        return const SizedBox.shrink();
      },
    );
  },
  dependencies: [
    // authViewModelProvider,
  ],
);

class AppNavigatorObserver extends NavigatorObserver {
  AppNavigatorObserver({required this.ref});

  final Ref<GoRouter> ref;

  @override
  void didPush(Route<dynamic> route, Route<dynamic>? previousRoute) {
    super.didPush(route, previousRoute);
    _visitPage(route.settings.name);
  }

  @override
  void didPop(Route<dynamic> route, Route<dynamic>? previousRoute) {
    super.didPop(route, previousRoute);
    _visitPage(previousRoute?.settings.name);
  }

  void _visitPage(String? location) {
    if (location != null) {
      if (location.startsWith('/')) {
        Future.microtask(
          () => ref.read(navigatorsRouteLocationsProvider.notifier).update((
            state,
          ) {
            final list = state..add(location);
            return list.toList();
          }),
        );
      }
    }
  }
}

CustomTransitionPage buildPageWithDefaultTransition<T>({
  required BuildContext context,
  required GoRouterState state,
  required Widget child,
}) {
  return CustomTransitionPage<T>(
    key: state.pageKey,
    child: child,
    transitionsBuilder:
        (context, animation, secondaryAnimation, child) =>
            FadeTransition(opacity: animation, child: child),
  );
}