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2999d738b8
I got carried away with Gemini and basically rewrote CI and the release process for the new LLM reality. This work was largely completed by Gemini. - Bump all SDK versions to the current beta (3.9.0-0) - Run `flutter channel beta` - Wrote `ci_script.dart` to replace the bash scripts - Converted repository to pub workspace #2499 - Added llm.md and release.md - Added redirect for deprecated Samples Index ## 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 have added sample code updates to the [changelog]. - [x] I updated/added relevant documentation (doc comments with `///`).
49 lines
1.5 KiB
Dart
49 lines
1.5 KiB
Dart
// Copyright 2019 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 'package:provider_shopper/models/catalog.dart';
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class CartModel extends ChangeNotifier {
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/// The private field backing [catalog].
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late CatalogModel _catalog;
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/// Internal, private state of the cart. Stores the ids of each item.
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final List<int> _itemIds = [];
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/// The current catalog. Used to construct items from numeric ids.
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CatalogModel get catalog => _catalog;
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set catalog(CatalogModel newCatalog) {
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_catalog = newCatalog;
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// Notify listeners, in case the new catalog provides information
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// different from the previous one. For example, availability of an item
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// might have changed.
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notifyListeners();
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}
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/// List of items in the cart.
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List<Item> get items =>
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_itemIds.map((id) => _catalog.getById(id)).toList();
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/// The current total price of all items.
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int get totalPrice =>
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items.fold(0, (total, current) => total + current.price);
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/// Adds [item] to cart. This is the only way to modify the cart from outside.
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void add(Item item) {
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_itemIds.add(item.id);
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// This line tells [Model] that it should rebuild the widgets that
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// depend on it.
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notifyListeners();
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}
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void remove(Item item) {
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_itemIds.remove(item.id);
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// Don't forget to tell dependent widgets to rebuild _every time_
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// you change the model.
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notifyListeners();
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}
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}
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