mohemm-flutter-app/lib/classes/utils.dart

import 'package:flutter/material.dart';
import 'package:fluttertoast/fluttertoast.dart';

// import 'package:fluttertoast/fluttertoast.dart';
import 'package:mohem_flutter_app/exceptions/api_exception.dart';
import 'package:mohem_flutter_app/widgets/loading_dialog.dart';

class Utils {
  static bool _isLoadingVisible = false;

  static bool get isLoading => _isLoadingVisible;

  static void showToast(String message) {
    Fluttertoast.showToast(
        msg: message, toastLength: Toast.LENGTH_SHORT, gravity: ToastGravity.BOTTOM, timeInSecForIosWeb: 1, backgroundColor: Colors.black54, textColor: Colors.white, fontSize: 16.0);
  }

  static dynamic getNotNullValue(List<dynamic> list, int index) {
    try {
      return list[index];
    } catch (ex) {
      return null;
    }
  }

  static int stringToHex(String colorCode) {
    try {
      return int.parse(colorCode.replaceAll("#", "0xff"));
    } catch (ex) {
      return (0xff000000);
    }
  }

  static void showLoading(BuildContext context) {
    WidgetsBinding.instance?.addPostFrameCallback((_) {
      _isLoadingVisible = true;
      showDialog(
        context: context,
        barrierColor: Colors.black.withOpacity(0.5),
        builder: (BuildContext context) => LoadingDialog(),
      ).then((value) {
        _isLoadingVisible = false;
      });
    });
  }

  static void hideLoading(BuildContext context) {
    if (_isLoadingVisible) {
      _isLoadingVisible = false;
      Navigator.of(context).pop();
    }
    _isLoadingVisible = false;
  }

  static void handleException(dynamic exception, Function(String)? onErrorMessage) {
    String errorMessage;
    if (exception is APIException) {
      if (exception.message == APIException.UNAUTHORIZED) {
        return;
      } else {
        errorMessage = exception.error?.errorMessage ?? exception.message;
      }
    } else {
      errorMessage = APIException.UNKNOWN;
    }
    if (onErrorMessage != null) {
      onErrorMessage(errorMessage);
    } else {
      showToast(errorMessage);
    }
  }
}