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## Pre-launch Checklist - [x] I read the [Flutter Style Guide] _recently_, and have followed its advice. - [x] I signed the [CLA]. - [x] I read the [Contributors Guide]. - [x] I updated/added relevant documentation (doc comments with `///`). - [x] All existing and new tests are passing. If you need help, consider asking for advice on the #hackers-devrel channel on [Discord]. <!-- Links --> [Flutter Style Guide]: https://github.com/flutter/flutter/blob/master/docs/contributing/Style-guide-for-Flutter-repo.md [CLA]: https://cla.developers.google.com/ [Discord]: https://github.com/flutter/flutter/blob/master/docs/contributing/Chat.md [Contributors Guide]: https://github.com/flutter/samples/blob/main/CONTRIBUTING.md
81 lines
2.4 KiB
Dart
81 lines
2.4 KiB
Dart
// Copyright 2018 The Flutter team. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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import 'package:flutter/foundation.dart';
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import 'local_veggie_provider.dart';
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import 'veggie.dart';
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class AppState extends ChangeNotifier {
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final List<Veggie> _veggies;
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AppState() : _veggies = LocalVeggieProvider.veggies;
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List<Veggie> get allVeggies => List<Veggie>.from(_veggies);
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List<Veggie> get availableVeggies {
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var currentSeason = _getSeasonForDate(DateTime.now());
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return _veggies.where((v) => v.seasons.contains(currentSeason)).toList();
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}
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List<Veggie> get favoriteVeggies =>
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_veggies.where((v) => v.isFavorite).toList();
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List<Veggie> get unavailableVeggies {
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var currentSeason = _getSeasonForDate(DateTime.now());
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return _veggies.where((v) => !v.seasons.contains(currentSeason)).toList();
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}
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Veggie getVeggie(int? id) => _veggies.singleWhere((v) => v.id == id);
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List<Veggie> searchVeggies(String? terms) => _veggies
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.where((v) => v.name.toLowerCase().contains(terms!.toLowerCase()))
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.toList();
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void setFavorite(int? id, bool isFavorite) {
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var veggie = getVeggie(id);
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veggie.isFavorite = isFavorite;
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notifyListeners();
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}
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/// Used in tests to set the season independent of the current date.
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static Season? debugCurrentSeason;
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static Season? _getSeasonForDate(DateTime date) {
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if (debugCurrentSeason != null) {
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return debugCurrentSeason;
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}
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// Technically the start and end dates of seasons can vary by a day or so,
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// but this is close enough for produce.
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switch (date.month) {
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case 1:
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return Season.winter;
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case 2:
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return Season.winter;
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case 3:
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return date.day < 21 ? Season.winter : Season.spring;
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case 4:
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return Season.spring;
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case 5:
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return Season.spring;
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case 6:
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return date.day < 21 ? Season.spring : Season.summer;
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case 7:
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return Season.summer;
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case 8:
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return Season.summer;
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case 9:
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return date.day < 22 ? Season.autumn : Season.winter;
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case 10:
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return Season.autumn;
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case 11:
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return Season.autumn;
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case 12:
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return date.day < 22 ? Season.autumn : Season.winter;
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default:
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throw ArgumentError('Can\'t return a season for month #${date.month}.');
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}
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}
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}
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