mymuseum-visitapp/lib/Components/ScannerDialog.dart

import 'package:flutter/material.dart';
import 'dart:io';
import 'package:flutter/foundation.dart';
import 'package:manager_api_new/api.dart';
import 'package:mymuseum_visitapp/Components/SlideFromRouteRight.dart';
import 'package:mymuseum_visitapp/Helpers/DatabaseHelper.dart';
import 'package:mymuseum_visitapp/Helpers/translationHelper.dart';
import 'package:mymuseum_visitapp/Models/visitContext.dart';
import 'package:mymuseum_visitapp/Screens/ConfigurationPage/configuration_page.dart';
import 'package:mymuseum_visitapp/Screens/section_page.dart';
import 'package:mymuseum_visitapp/app_context.dart';
import 'package:mymuseum_visitapp/constants.dart';
import 'package:mobile_scanner/mobile_scanner.dart';

class ScannerDialog extends StatefulWidget {
  const ScannerDialog({Key? key, required this.appContext}) : super(key: key);

  final AppContext? appContext;

  @override
  State<ScannerDialog> createState() => _ScannerDialogState();
}

class _ScannerDialogState extends State<ScannerDialog> {
  final MobileScannerController controller = MobileScannerController();
  bool isProcessing = false;

  @override
  void reassemble() {
    super.reassemble();
    if (Platform.isAndroid) {
      controller.stop();
    }
    controller.start();
  }

  @override
  Widget build(BuildContext context) {
    Size size = MediaQuery.of(context).size;

    return Container(
      height: size.height * 0.5,
      width: size.width * 0.9,
      child: Stack(
        children: [
          Center(
            child: ClipRRect(
              borderRadius: BorderRadius.circular(10.0),
              child: MobileScanner(
                controller: controller,
                //allowDuplicates: false,
                onDetect: (barcodes) => _onDetect(barcodes),
              ),
            ),
          ),
          _buildControlButton(
            icon: Icons.flash_on,
            onTap: () => controller.toggleTorch(),
            alignment: Alignment.topRight,
          ),
          _buildControlButton(
            icon: Icons.flip_camera_android,
            onTap: () => controller.switchCamera(),
            alignment: Alignment.bottomRight,
          ),
        ],
      ),
    );
  }

  Widget _buildControlButton({
    required IconData icon,
    required VoidCallback onTap,
    required Alignment alignment,
  }) {
    return Align(
      alignment: alignment,
      child: Container(
        width: 45,
        height: 45,
        margin: const EdgeInsets.all(8),
        decoration: BoxDecoration(
          shape: BoxShape.rectangle,
          color: kMainColor1,
          borderRadius: BorderRadius.circular(20.0),
        ),
        child: InkWell(
          onTap: onTap,
          child: Icon(icon, color: Colors.white),
        ),
      ),
    );
  }

  Future<void> _onDetect(BarcodeCapture capture) async {
    if (isProcessing) return;

    final barcode = capture.barcodes.first;
    final code = barcode.rawValue ?? "";

    if (barcode.format == BarcodeFormat.qrCode && code.isNotEmpty) {
      isProcessing = true;

      RegExp regExp = RegExp(r'^(?:https:\/\/web\.myinfomate\.be\/([^\/]+)\/([^\/]+)\/([^\/]+)|([^\/]+))$');
      RegExp regExp2 = RegExp(r'^(?:https:\/\/web\.mymuseum\.be\/([^\/]+)\/([^\/]+)\/([^\/]+)|([^\/]+))$');
      var match = regExp.firstMatch(code);
      var match2 = regExp2.firstMatch(code);
      String? instanceId;
      String? configurationId;
      String? sectionId;

      if(match == null) {
        instanceId = match2?.group(1);
        configurationId = match2?.group(2);
        sectionId = match2?.group(3) ?? match2?.group(4);
      } else {
        instanceId = match.group(1);
        configurationId = match.group(2);
        sectionId = match.group(3) ?? match.group(4);
      }

      if ((match == null && match2 == null) || sectionId == null) {
        ScaffoldMessenger.of(context).showSnackBar(
          SnackBar(content: Text("L'URL ne correspond pas au format attendu."), backgroundColor: kMainColor2),
        );
        Navigator.of(context).pop();
        return;
      }

      VisitAppContext visitAppContext = widget.appContext!.getContext();

      if (visitAppContext.sectionIds == null || !visitAppContext.sectionIds!.contains(sectionId)) {
        visitAppContext.statisticsService?.track(VisitEventType.qrScan, metadata: {'valid': false, 'sectionId': sectionId});

        // Le QR porte l'id de sa configuration, jusqu'ici parsé puis jeté. Un code
        // d'une autre visite du site tombait donc dans « QR code invalide », qui
        // laisse croire à un code abîmé alors qu'il est parfaitement lisible.
        final other = await _findOtherConfiguration(visitAppContext, configurationId);
        if (!mounted) return;

        // Capturés AVANT le pop : fermer la boîte du scanner démonte ce State, et
        // tout ce qui repasse ensuite par son `context` — la navigation depuis le
        // bouton « Ouvrir », touché quelques secondes plus tard — ne fait rien.
        final navigator = Navigator.of(context);
        final messenger = ScaffoldMessenger.of(context);
        navigator.pop();

        if (other != null) {
          _proposeOtherVisit(navigator, visitAppContext, other, sectionId);
        } else {
          messenger.showSnackBar(
            SnackBar(content: Text(TranslationHelper.getFromLocale('invalidQRCode', visitAppContext)), backgroundColor: kMainColor2),
          );
        }
      } else {
        visitAppContext.statisticsService?.track(VisitEventType.qrScan, sectionId: sectionId, metadata: {'valid': true});
        // `orElse` : sans lui, le moindre écart entre `sectionIds` et
        // `currentSections` levait un StateError non rattrapé, en plein scan.
        dynamic rawSection = visitAppContext.currentSections
            ?.firstWhere((cs) => cs?['id'] == sectionId, orElse: () => null);
        Navigator.of(context).pop();

        if (rawSection == null) {
          ScaffoldMessenger.of(context).showSnackBar(
            SnackBar(content: Text(TranslationHelper.getFromLocale('invalidQRCode', visitAppContext)), backgroundColor: kMainColor2),
          );
          return;
        }

        Navigator.push(
          context,
          SlideFromRightRoute(page: SectionPage(
            configuration: visitAppContext.configuration!,
            rawSection: rawSection,
            visitAppContextIn: visitAppContext,
            sectionId: rawSection['id'],
          )),
        );
      }
    }
  }

  /// La configuration du QR, si elle existe et n'est pas celle qu'on lit déjà.
  /// La base locale d'abord — c'est la seule source hors ligne — puis l'API.
  Future<ConfigurationDTO?> _findOtherConfiguration(
      VisitAppContext visitAppContext, String? configurationId) async {
    if (configurationId == null || configurationId == visitAppContext.configuration?.id) {
      return null;
    }

    final local = await DatabaseHelper.instance
        .queryWithColumnId(DatabaseTableType.configurations, configurationId);
    if (local.isNotEmpty) {
      return DatabaseHelper.instance.getConfigurationFromDB(local.first);
    }

    try {
      return await visitAppContext.clientAPI.configurationApi!
          .configurationGetDetail(configurationId);
    } catch (e) {
      debugPrint("[scan] configuration $configurationId introuvable : $e");
      return null;
    }
  }

  Future<void> _proposeOtherVisit(NavigatorState navigator,
      VisitAppContext visitAppContext, ConfigurationDTO other, String sectionId) async {
    final name = TranslationHelper.getPlain(other.title, visitAppContext);

    // Une visite hors ligne non téléchargée n'a rien à afficher : on nomme la
    // visite sans proposer de l'ouvrir sur du vide.
    final sections = await DatabaseHelper.instance
        .queryWithConfigurationId(DatabaseTableType.sections, other.id!);
    final canOpen = other.isOffline != true || sections.isNotEmpty;

    showDialog(
      context: navigator.context,
      builder: (dialogContext) => AlertDialog(
        shape: const RoundedRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(20))),
        title: Text(name, textAlign: TextAlign.center),
        content: Text(
          TranslationHelper.getFromLocale('qrOtherVisit', visitAppContext),
          textAlign: TextAlign.center,
        ),
        actionsAlignment: MainAxisAlignment.center,
        actions: [
          TextButton(
            onPressed: () => Navigator.of(dialogContext).pop(),
            child: Text(TranslationHelper.getFromLocale('close', visitAppContext)),
          ),
          if (canOpen)
            TextButton(
              onPressed: () {
                Navigator.of(dialogContext).pop();
                visitAppContext.configuration = other;
                visitAppContext.sectionIds = null;
                widget.appContext!.setContext(visitAppContext);
                navigator.push(
                  SlideFromRightRoute(
                    page: ConfigurationPage(
                      configuration: other,
                      isAlreadyAllowed: visitAppContext.isScanBeaconAlreadyAllowed,
                      openSectionId: sectionId,
                    ),
                  ),
                );
              },
              child: Text(TranslationHelper.getFromLocale('open', visitAppContext)),
            ),
        ],
      ),
    );
  }

  @override
  void dispose() {
    controller.dispose();
    super.dispose();
  }
}

showScannerDialog(BuildContext context, AppContext appContext) {
  showDialog(
    context: context,
    builder: (BuildContext context) => AlertDialog(
      shape: const RoundedRectangleBorder(
        borderRadius: BorderRadius.all(Radius.circular(10.0)),
      ),
      content: ScannerDialog(appContext: appContext),
      contentPadding: EdgeInsets.zero,
    ),
  );
}