current route state notifier (the vm)

current_route_state_notifier.dart

import 'package:app_scaffold/flex/flex_target.dart';
import 'package:state_notifier/state_notifier.dart';
import 'package:userinterface/core/navigation/models/current_route.dart';

/// StateNotifier for the immutable AppNavigation data.
/// For Service Locator injection, this class is registered
/// With GetIt. In Provider type ionjectors, we make
/// A separate NotifierProvider class.
///
/// Many people mistakenly label this as a controller, its
/// not that but a model-view.
class CurrentRouteStateNotifier extends StateNotifier<CurrentRoute> {
  CurrentRouteStateNotifier([CurrentRoute? appNavigation])
    : super(appNavigation ?? const CurrentRoute(pushedDestination: FlexTarget(), destination: FlexTarget()));

  void setDestination(FlexTarget value) {
    state = state.copyWith(destination: value, usePush: false);
  }

  void setModalDestination(FlexTarget value) {
    state = state.copyWith(pushedDestination: value, usePush: true);
  }
}