ChickenFarm/UI/CF.APP/chicken_farm/lib/pages/sample/sample_query_page.dart

import 'package:chicken_farm/routes/app_routes.dart';
import 'package:flutter/material.dart';
import 'package:chicken_farm/components/vb_app_bar.dart';
import 'package:chicken_farm/components/qr_scanner.dart';
import 'package:go_router/go_router.dart';

class SampleQueryPage extends StatefulWidget {
  const SampleQueryPage({super.key});

  @override
  State<SampleQueryPage> createState() => _SampleQueryPageState();
}

const String _qrCodePrefix = 'vb@sample@/sample/';

class _SampleQueryPageState extends State<SampleQueryPage> {
  Future<String?> _parseSampleQRCode(String rawContent) async {
    try {
      // 替换掉 _qrCodePrefix
      final content = rawContent.replaceFirst(_qrCodePrefix, '');
      if (content.isNotEmpty) {
        // 检查是否能转成int，能转就返回conetent，不能返回null
        return int.parse(content).toString();
      }
      return null;
    } catch (e) {
      return null;
    }
  }

  void _handleSampleScan(String scannedContent) async {
    // 跳转到样品详情页面，传递id参数为scannedContent
    if (mounted) {
      context.pushNamed(
        AppRouteNames.sampleDetail,
        pathParameters: {'id': scannedContent},
      );
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: const VberAppBar(title: '样品查询', showLeftButton: true),
      body: QRScannerComponent(
        startWithString: _qrCodePrefix,
        onScanCallback: _handleSampleScan,
        invalidQRMessage: '样品二维码无效！',
        qrCodeParser: _parseSampleQRCode,
      ),
    );
  }
}