m3_lightmeter/lib/providers/films_provider.dart

102 lines
2.7 KiB
Dart

import 'package:flutter/material.dart';
import 'package:lightmeter/utils/selectable_provider.dart';
import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
class FilmsProvider extends StatefulWidget {
final IAPStorageService storageService;
final Widget child;
const FilmsProvider({
required this.storageService,
required this.child,
super.key,
});
static FilmsProviderState of(BuildContext context) {
return context.findAncestorStateOfType<FilmsProviderState>()!;
}
@override
State<FilmsProvider> createState() => FilmsProviderState();
}
class FilmsProviderState extends State<FilmsProvider> {
late List<Film> _filmsInUse;
late Film _selected;
@override
void initState() {
super.initState();
_filmsInUse = widget.storageService.filmsInUse;
_selected = widget.storageService.selectedFilm;
_discardSelectedIfNotIncluded();
}
@override
Widget build(BuildContext context) {
return Films(
values: films,
filmsInUse: [
const Film.other(),
if (IAPProducts.isPurchased(context, IAPProductType.paidFeatures)) ..._filmsInUse,
],
selected: IAPProducts.isPurchased(context, IAPProductType.paidFeatures)
? _selected
: const Film.other(),
child: widget.child,
);
}
void setFilm(Film film) {
if (_selected != film) {
_selected = film;
widget.storageService.selectedFilm = film;
setState(() {});
}
}
void saveFilms(List<Film> films) {
_filmsInUse = films;
widget.storageService.filmsInUse = films;
_discardSelectedIfNotIncluded();
setState(() {});
}
void _discardSelectedIfNotIncluded() {
if (_selected != const Film.other() && !_filmsInUse.contains(_selected)) {
_selected = const Film.other();
widget.storageService.selectedFilm = const Film.other();
}
}
}
class Films extends SelectableInheritedModel<Film> {
final List<Film> filmsInUse;
const Films({
super.key,
required super.values,
required this.filmsInUse,
required super.selected,
required super.child,
});
/// [Film.other()] + all the custom fields with actual reciprocity formulas
static List<Film> of(BuildContext context) {
return InheritedModel.inheritFrom<Films>(context)!.values;
}
/// [Film.other()] + films in use selected by user
static List<Film> inUseOf<T>(BuildContext context) {
return InheritedModel.inheritFrom<Films>(
context,
aspect: SelectableAspect.list,
)!
.filmsInUse;
}
static Film selectedOf(BuildContext context) {
return InheritedModel.inheritFrom<Films>(context, aspect: SelectableAspect.selected)!.selected;
}
}