flutter-demo/lib/provider/item_provider.dart

import 'package:flutter/material.dart';
import 'package:item_tracker/models/item_model.dart';
import 'package:item_tracker/repository/item_repository.dart';

class ItemProvider extends ChangeNotifier {
  List<Item> _items = [];

  List<Item> get items => _items;

  final ItemRepository repository;

  ItemProvider({required this.repository});

  Future<void> loadItems() async {
    final data = await repository.getAllItems();
    _items = data.map((map) => Item.fromMap(map)).toList();
    notifyListeners();
  }

  Future<void> addItem(Item item) async {
    await repository.insertItem(item);
    await loadItems(); // 插入后刷新
  }

  Future<void> updateItem(Item item) async {
    await repository.updateItem(item);
    await loadItems(); // 更新后刷新
  }

  Future<void> deleteItem(Item item) async {
    await repository.deleteItem(item);
    await loadItems(); // 删除后刷新
  }
}