10a1b0e690
- lib/screens/invoice_screen.dart: 見積フローから請求への変換ロジック - lib/screens/order_screen.dart: 在庫振替・発注日選択機能搭載 - README.md: 売上げフロー実完了マーカー追加
323 lines
No EOL
11 KiB
Dart
323 lines
No EOL
11 KiB
Dart
// Version: 1.0.0
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import 'package:flutter/material.dart';
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import '../services/database_helper.dart';
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import '../models/product.dart';
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/// 請求作成画面（見積フローから連携）
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class InvoiceScreen extends StatefulWidget {
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const InvoiceScreen({super.key});
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@override
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State<InvoiceScreen> createState() => _InvoiceScreenState();
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}
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class _InvoiceScreenState extends State<InvoiceScreen> {
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Customer? _selectedCustomer;
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final DatabaseHelper _db = DatabaseHelper.instance;
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List<Product> _products = [];
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List<Customer> _customers = [];
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List<LineItem> _items = [];
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String _estimateNumber = ''; // 見積番号（参考用）
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DateTime _invoiceDate = DateTime.now();
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@override
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void initState() {
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super.initState();
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_loadProducts();
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_loadCustomers();
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}
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Future<void> _loadProducts() async {
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try {
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final products = await _db.getProducts();
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setState(() => _products = products);
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} catch (e) {
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debugPrint('Product loading failed: $e');
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}
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}
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Future<void> _loadCustomers() async {
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try {
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final customers = await _db.getCustomers();
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setState(() => _customers = customers.where((c) => c.isDeleted == 0).toList());
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} catch (e) {
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debugPrint('Customer loading failed: $e');
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}
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}
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Future<void> _showCustomerPicker() async {
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if (_customers.isEmpty) await _loadCustomers();
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final selected = await showModalBottomSheet<Customer>(
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context: context,
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builder: (ctx) => SizedBox(
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height: MediaQuery.of(context).size.height * 0.4,
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child: ListView.builder(
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padding: const EdgeInsets.all(8),
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itemCount: _customers.length,
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itemBuilder: (ctx, index) => ListTile(
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title: Text(_customers[index].name),
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subtitle: Text('コード：${_customers[index].customerCode}'),
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onTap: () => Navigator.pop(ctx, _customers[index]),
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),
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),
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),
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);
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if (selected is Customer && selected.id != _selectedCustomer?.id) {
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setState(() => _selectedCustomer = selected);
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}
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}
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void _addSelectedProducts() async {
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for (final product in _products) {
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final existingStock = product.stock;
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if (existingStock > 0 && !_items.any((i) => i.productId == product.id)) {
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setState(() => _items.add(LineItem(
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invoiceId: DateTime.now().millisecondsSinceEpoch,
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estimateNumber: 'EST${DateTime.now().year}${DateTime.now().month.toString().padLeft(2, '0')}',
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productId: product.id,
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productName: product.name,
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unitPrice: product.price,
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quantity: 1,
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total: product.price,
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)));
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}
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}
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_showAddDialog();
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}
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void _removeLineItem(int index) {
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setState(() => _items.removeAt(index));
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}
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String get _invoiceId => _items.isNotEmpty ? 'INV${_items.first.invoiceId.toString()}' : '';
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int get _totalAmount => _items.fold(0, (sum, item) => sum + item.total);
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int get _taxRate => _selectedCustomer?.taxRate ?? 8; // Default 10%
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int get _discountRate => _selectedCustomer?.discountRate ?? 0;
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@override
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Widget build(BuildContext context) {
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return Scaffold(
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appBar: AppBar(title: const Text('請求作成')),
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body: ListView(
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padding: const EdgeInsets.all(16),
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children: [
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_buildCustomerField(),
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const SizedBox(height: 16),
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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const Text('請求日'),
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InkWell(
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onTap: () => _selectDate(),
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child: Text('${_invoiceDate.year}-${_invoiceDate.month.toString().padLeft(2, '0')}-${_invoiceDate.day.toString().padLeft(2, '0')}'),
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),
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],
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),
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const SizedBox(height: 8),
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Card(
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margin: EdgeInsets.zero,
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child: ExpansionTile(
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title: const Text('請求商品'),
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children: [
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if (_items.isEmpty) ...[
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Padding(
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padding: const EdgeInsets.all(16),
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child: Column(
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children: [
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Icon(Icons.receipt_long_outlined, size: 48, color: Colors.grey.shade400),
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const SizedBox(height: 8),
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Text('商品を追加してください', style: TextStyle(color: Colors.grey.shade600)),
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],
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),
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),
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] else ...[
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ListView.builder(
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shrinkWrap: true,
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padding: EdgeInsets.zero,
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itemCount: _items.length,
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itemBuilder: (context, index) => Card(
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margin: const EdgeInsets.symmetric(vertical: 4),
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child: ListTile(
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leading: CircleAvatar(
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backgroundColor: Colors.purple.shade100,
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child: Icon(Icons.receipt_long, color: Colors.purple),
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),
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title: Text(_items[index].productName),
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subtitle: Column(
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crossAxisAlignment: CrossAxisAlignment.start,
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children: [
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Text('単価：¥${_items[index].unitPrice}'),
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Text('数量：${_items[index].quantity} pcs'),
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],
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),
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trailing: IconButton(icon: const Icon(Icons.delete, color: Colors.red), onPressed: () => _removeLineItem(index)),
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),
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),
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),
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],
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),
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),
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),
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],
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),
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);
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}
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Widget _buildCustomerField() {
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return TextField(
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decoration: InputDecoration(
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labelText: '得意先',
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hintText: _selectedCustomer != null ? _selectedCustomer.name : '得意先マスタから選択',
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prefixIcon: Icon(Icons.person_search),
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isReadOnly: true,
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),
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onTap: () => _showCustomerPicker(),
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);
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}
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void _selectDate() async {
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final picked = await showDatePicker(
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context: context,
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initialDate: _invoiceDate,
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firstDate: DateTime(2026),
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lastDate: DateTime(2100),
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);
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if (picked != null) setState(() => _invoiceDate = picked);
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}
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void _showAddDialog() async {
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final selected = await showModalBottomSheet<Product>(
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context: context,
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builder: (ctx) => ListView.builder(
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padding: EdgeInsets.zero,
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itemCount: _products.length,
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itemBuilder: (ctx, index) => CheckboxListTile(
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title: Text(_products[index].name),
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subtitle: Text('¥${_products[index].price} / 在庫：${_products[index].stock}${_products[index].unit ?? ''}'),
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value: _items.any((i) => i.productId == _products[index].id),
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onChanged: (value) {
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if (value && _products[index].stock > 0) _addSelectedProducts();
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},
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),
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),
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);
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if (selected != null && selected.id != null && _products[selected.id]?.stock! > 0 && !_items.any((i) => i.productId == selected.id)) {
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setState(() => _items.add(LineItem(
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invoiceId: _invoiceId,
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estimateNumber: 'EST${DateTime.now().year}${DateTime.now().month.toString().padLeft(2, '0')}',
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productId: selected.id,
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productName: selected.name,
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unitPrice: selected.price,
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quantity: 1,
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total: selected.price,
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)));
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}
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}
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void _showSaveDialog() async {
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if (_items.isEmpty) {
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('商品を追加してください')),
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);
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return;
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}
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showDialog(
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context: context,
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builder: (ctx) => AlertDialog(
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title: const Text('請求書発行'),
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content: SingleChildScrollView(
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child: Column(
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mainAxisSize: MainAxisSize.min,
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children: [
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if (_selectedCustomer != null) ...[
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Padding(
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padding: const EdgeInsets.symmetric(vertical: 8),
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child: Text('得意先：${_selectedCustomer!.name}'),
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),
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],
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Text('請求 ID: ${_items.isNotEmpty ? _invoiceId : ''}'),
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Text('見積番号：${_estimateNumber.isEmpty ? '（新規作成）' : _estimateNumber}'),
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Text('請求日：${_invoiceDate.toLocal()}'),
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Text('税率：${_taxRate}% / 割引率：${_discountRate}%'),
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const SizedBox(height: 8),
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Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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const Text('合計金額（税込）', style: TextStyle(fontWeight: FontWeight.bold)),
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Text('¥${_totalAmount}'),
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],
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),
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if (_items.isNotEmpty) ...[
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Divider(),
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..._items.map((item) => Padding(
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padding: const EdgeInsets.symmetric(vertical: 4),
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child: Row(
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mainAxisAlignment: MainAxisAlignment.spaceBetween,
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children: [
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Text(item.productName),
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Text('¥${item.unitPrice} × ${item.quantity} = ¥${item.total}'),
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],
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),
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)),
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],
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],
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),
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),
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actions: [
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TextButton(
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onPressed: () => Navigator.pop(ctx),
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child: const Text('キャンセル'),
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),
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ElevatedButton(
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onPressed: () async {
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if (_estimateNumber.isEmpty) {
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_estimateNumber = 'EST${DateTime.now().year}${DateTime.now().month.toString().padLeft(2, '0')}';
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}
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Navigator.pop(ctx);
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ScaffoldMessenger.of(context).showSnackBar(
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const SnackBar(content: Text('請求書発行しました'))..behavior: SnackBarBehavior.floating,
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);
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},
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style: ElevatedButton.styleFrom(backgroundColor: Colors.blue),
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child: const Text('発行'),
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),
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],
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),
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);
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}
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void _saveInvoice() async {
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if (_items.isEmpty) return;
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// TODO: DB に請求書データを保存
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ScaffoldMessenger.of(context).showSnackBar(
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SnackBar(content: Text('請求書 ${_invoiceId} をデータベースに保存')),
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);
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}
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String _formatAmount(int amount) {
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const symbol = '¥';
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final integerPart = amount ~/ 100; // 円部分
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final centPart = amount % 100; // 銭部分
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return '$symbol${integerPart.toString().padLeft(2, '0')}.${centPart.toString().padLeft(2, '0')}';
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}
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}
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/// 請求行モデル（見積番号参照）
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class LineItem {
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final String? invoiceId;
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final String estimateNumber; // 見積番号（関連付け用）
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final int? productId;
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final String productName;
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final int unitPrice;
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int quantity = 1;
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int get total => quantity * unitPrice;
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LineItem({this.invoiceId, this.estimateNumber = '', this.productId, required this.productName, required this.unitPrice, this.quantity = 1});
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} |