81 lines
3.1 KiB
Dart
81 lines
3.1 KiB
Dart
// version: 1.0.1 (Stable Standalone Edition)
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import 'dart:io';
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import 'dart:typed_data';
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import 'package:flutter/material.dart';
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import 'package:pdf/widgets.dart' as pw;
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import 'package:path_provider/path_provider.dart';
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import 'package:crypto/crypto.dart';
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import 'package:intl/intl.dart';
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void main() => runApp(const MaterialApp(home: InvoiceApp()));
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class InvoiceApp extends StatefulWidget {
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const InvoiceApp({super.key});
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@override
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State<InvoiceApp> createState() => _InvoiceAppState();
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}
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class _InvoiceAppState extends State<InvoiceApp> {
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final _clientController = TextEditingController(text: "現場太郎 様");
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final _amountController = TextEditingController(text: "1500"); // 10%抜き単価
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String _status = "内容を入力してPDFを発行してください";
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Future<void> _generateInvoice() async {
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final pdf = pw.Document();
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final clientName = _clientController.text;
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final int unitPrice = int.tryParse(_amountController.text) ?? 0;
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// 【こだわり1】10%固定計算
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final int tax = (unitPrice * 0.1).floor();
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final int total = unitPrice + tax;
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final dateStr = DateFormat('yyyy/MM/dd HH:mm').format(DateTime.now());
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// PDFの内容（超シンプル）
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pdf.addPage(pw.Page(build: (context) => pw.Column(children: [
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pw.Text("Invoice / Receipt", style: pw.TextStyle(fontSize: 40)),
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pw.Divider(),
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pw.Text("Client: $clientName"),
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pw.Text("Date: $dateStr"),
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pw.SizedBox(height: 20),
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pw.Text("Subtotal: $unitPrice JPY"),
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pw.Text("Tax (10%): $tax JPY"),
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pw.Text("Total: $total JPY", style: pw.TextStyle(fontWeight: pw.FontWeight.bold)),
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])));
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// PDFをバイトデータに変換
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final Uint8List bytes = await pdf.save();
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// 【こだわり2】SHA-256ハッシュ計算
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final hash = sha256.convert(bytes).toString().substring(0, 10);
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// 【こだわり3】ファイル名に情報を詰め込む
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final fileName = "${DateFormat('yyyyMMdd').format(DateTime.now())}_${clientName}_${total}円_hash_$hash.pdf";
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// 保存（Androidの書類フォルダなど）
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final directory = await getExternalStorageDirectory();
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final file = File("${directory!.path}/$fileName");
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await file.writeAsBytes(bytes);
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setState(() {
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_status = "保存完了！\n場所: ${file.path}\nハッシュ: $hash";
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});
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}
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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("現場のじぇみエモン請求書")),
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body: Padding(
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padding: const EdgeInsets.all(16.0),
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child: Column(children: [
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TextField(controller: _clientController, decoration: const InputDecoration(labelText: "取引先名")),
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TextField(controller: _amountController, decoration: const InputDecoration(labelText: "単価(税抜)")),
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const SizedBox(height: 20),
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ElevatedButton(onPressed: _generateInvoice, child: const Text("PDF発行 & ハッシュ保存")),
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const SizedBox(height: 20),
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Text(_status, style: const TextStyle(color: Colors.blue)),
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]),
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),
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);
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}
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}
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