onNavigation method

@override Future<void> onNavigation(NavigationResolver resolver, StackRouter router)

clients will call resolver.next(true --> default) to continue navigation or resolver.next(false) to abort navigation example

Implementation

@override
Future<void> onNavigation(
  final NavigationResolver resolver,
  final StackRouter router,
) async {
  final AuthenticationBloc auth = context.authBloc(listen: false);
  if (auth.state is AuthInitial) {
    await router.push(initialScreenRoute);
    final AuthenticationState newState = await auth.stream.first;
    if (newState is AuthError) {
      await router.replace(
        errorRoute.call(
          newState.error,
        ),
      );
      throw Exception(
        newState.error,
      );
    }
    router.removeLast();
    await _handleAuthStatus(
      auth,
      router,
      authRoute,
      resolver,
      removeRoutesPredicateOnAuth,
    );
  } else {
    await _handleAuthStatus(
      auth,
      router,
      authRoute,
      resolver,
      removeRoutesPredicateOnAuth,
    );
  }
}