mobile-app/lib/main.dart

import 'package:barcode_scan/barcode_scan.dart';
import 'package:camera/camera.dart';
import 'package:farm_tpf/presentation/screens/plot_detail/bloc/plot_detail_bloc.dart';
import 'package:farm_tpf/presentation/screens/plot_detail/sc_plot_detail.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import 'package:get/route_manager.dart';
import 'package:rflutter_alert/rflutter_alert.dart';
import 'app.dart';
import 'custom_model/CropPlot.dart';
import 'data/repository/authentication_repository.dart';
import 'data/repository/repository.dart';

List<CameraDescription> cameras = [];
Future<void> main() async {
  // Fetch the available cameras before initializing the app.
  try {
    WidgetsFlutterBinding.ensureInitialized();
    cameras = await availableCameras();
  } on CameraException catch (e) {
    print(e.description);
  }
  runApp(App(authenticationRepository: AuthenticationRepository()));
}

Future<dynamic> myBackgroundMessageHandler(Map<String, dynamic> message) {
  if (message.containsKey('data')) {
    // Handle data message
    final dynamic data = message['data'];
  }

  if (message.containsKey('notification')) {
    // Handle notification message
    final dynamic notification = message['notification'];
  }

  // Or do other work.
}

Future scan(BuildContext context) async {
  var _aspectTolerance = 0.00;
  var _selectedCamera = -1;
  var _useAutoFocus = true;
  var _autoEnableFlash = false;
  try {
    var options = ScanOptions(
      strings: {
        "cancel": "Huỷ",
        "flash_on": "Bật flash",
        "flash_off": "Tắt flash",
      },
      useCamera: _selectedCamera,
      autoEnableFlash: _autoEnableFlash,
      android: AndroidOptions(
        aspectTolerance: _aspectTolerance,
        useAutoFocus: _useAutoFocus,
      ),
    );
    var result = await BarcodeScanner.scan(options: options);
    print(result.toString());
    if (result.type == ResultType.Cancelled) {
      print("canncel");
    } else if (result.type == ResultType.Error) {
      print("error");
    } else {
      _showAlertCheckCropCode(context, result.rawContent);
    }
  } on PlatformException catch (e) {
    var result = ScanResult(
      type: ResultType.Error,
      format: BarcodeFormat.unknown,
    );
    print("error: ${e.message}");
  }
}

_showAlertCheckCropCode(BuildContext context, String cropCode) {
  Alert(
      context: context,
      title: "",
      style: AlertStyle(isCloseButton: false, isOverlayTapDismiss: false),
      content: BlocProvider<PlotDetailBloc>(
          create: (context) => PlotDetailBloc(repository: Repository())
            ..add(DataFetched(cropCode: cropCode)),
          child: BlocBuilder<PlotDetailBloc, PlotDetailState>(
              builder: (context, state) {
            if (state is PlotDetailInitial) {
              return Center(
                child: Text(""),
              );
            } else if (state is PlotDetailFailure) {
              return Center(
                child: Column(
                  children: [
                    Text("Lô không tồn tại"),
                    SizedBox(
                      height: 16,
                    ),
                    DialogButton(
                      onPressed: () {
                        Get.back();
                        scan(context);
                      },
                      child: Text(
                        "Quét lại",
                        style: TextStyle(color: Colors.white, fontSize: 20),
                      ),
                    )
                  ],
                ),
              );
            } else if (state is PlotDetailSuccess) {
              var result = state.ownerItem as CropPlot;
              WidgetsBinding.instance.addPostFrameCallback((_) {
                Get.back();
                Get.to(PlotDetailScreen(
                  cropId: result.tbCropDTO.id,
                  initialIndex: 1,
                ));
              });
              return Center(child: Text(""));
            } else {
              return Center(
                child: Column(
                  children: [
                    CircularProgressIndicator(),
                    SizedBox(
                      height: 8,
                    ),
                    Text("Kiểm tra thông tin lô ....")
                  ],
                ),
              );
            }
          })),
      buttons: []).show();
}