cpd_2022_zi/lib/pages/scanner_page.dart

import 'package:flutter/material.dart';
import 'package:mobile_scanner/mobile_scanner.dart';
import 'package:smoke_cess_app/models/settings.dart';
import 'package:smoke_cess_app/service/json_service.dart';
import 'package:smoke_cess_app/service/settings_service.dart';

import '../widgets/missing_config_popup.dart';

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

  @override
  State<StatefulWidget> createState() => ScannerPageState();
}

class ScannerPageState extends State<ScannerPage> {
  bool scanning = false;

  @override
  Widget build(BuildContext context) {
    return Center(
        child: Column(
      mainAxisAlignment: MainAxisAlignment.center,
      children: [
        scanning
            ? Expanded(
                child: MobileScanner(
                fit: BoxFit.contain,
                controller: MobileScannerController(
                  detectionTimeoutMs: 2000,
                ),
                onDetect: (capture) {
                  //TODO Errorhandling!!
                  final List<Barcode> barcodes = capture.barcodes;
                  for (final barcode in barcodes) {
                    if (barcode.rawValue != null) {
                      String qrText = barcode.rawValue!;
                      Map<String, dynamic> json = stringToJSON(qrText);
                      Settings settings = Settings.fromJson(json);
                      saveSettings(settings);
                      setState(() {
                        scanning = false;
                        showDialog(
                            context: context,
                            builder: (BuildContext context) {
                              return MissingConfigPopup(
                                title: 'Konfiguration erfolgreich',
                                text: 'Du gehörst zu Gruppe ${settings.group}',
                              );
                            });
                      });
                    }
                  }
                },
              ))
            : ElevatedButton(
                style: ElevatedButton.styleFrom(
                    textStyle: const TextStyle(fontSize: 20)),
                onPressed: () {
                  setState(() => scanning = true);
                },
                child: const Text('Scan QR Code'),
              ),
        const SizedBox(height: 30),
        ElevatedButton(
          style: ElevatedButton.styleFrom(
              textStyle: const TextStyle(fontSize: 20)),
          onPressed: () {
            loadSettingsFromLocalJSON();
          },
          child: const Text('Read JSON'),
        )
      ],
    ));
  }
}