iv_and/customer_provider.dart

import 'package:flutter/material.dart';
import 'package:sqflite/sqflite.dart';
import 'db_helper.dart';
import 'customer.dart';

class CustomerProvider with ChangeNotifier {
  List<Customer> _customers = [];

  List<Customer> get customers => _customers;

  Future<void> fetchCustomers() async {
    final db = await DbHelper().database;
    final List<Map<String, dynamic>> maps = await db.query('customers');
    _customers = List.generate(maps.length, (i) {
      return Customer.fromMap(maps[i]);
    });
    notifyListeners();
  }

  Future<void> addCustomer(Customer customer) async {
    final db = await DbHelper().database;
    await db.insert('customers', customer.toMap());
    fetchCustomers();
  }

  // 追加の CRUD メソッドを実装
}