diplomatic-quarter/lib/uitl/utils.dart

import 'package:connectivity/connectivity.dart';
import 'package:flutter/cupertino.dart';

import 'app_shared_preferences.dart';
import 'app_toast.dart';

AppSharedPreferences sharedPref = new AppSharedPreferences();

class Utils {
  ///show  custom Error Toast
  ///  [message] to show for user
  static showErrorToast([String message]) {
    String localMsg = generateContactAdminMessage();
    if (message != null) {
      localMsg = message.toString();
    }
    AppToast.showErrorToast(message: localMsg);
  }

  /// Check The Internet Connection
  static Future<bool> checkConnection() async {
    ConnectivityResult connectivityResult =
        await (Connectivity().checkConnectivity());
    if ((connectivityResult == ConnectivityResult.mobile) ||
        (connectivityResult == ConnectivityResult.wifi)) {
      return true;
    } else {
      return false;
    }
  }

  /// generate Contact Admin Message
  static generateContactAdminMessage([err]) {
    String localMsg = 'Something wrong happened, please contact the admin';
    if (err != null) {
      localMsg = localMsg + '\n \n' + err.toString();
    }
    return localMsg;
  }

  /// hides the keyboard if its already open
  static hideKeyboard(BuildContext context) {
    FocusScope.of(context).unfocus();
  }

  bool isSAUDIIDValid(String id) {
    if (id == null) {
      return false;
    }
    try {
      id = id.toString();
      id = id.trim();
      var returnValue = int.parse(id);
      var sum = 0;
      if (returnValue > 0) {
        var type = int.parse(id[0]);

        if (id.length != 10) {
          return false;
        }
        if (type != 2 && type != 1) {
          return false;
        }

        for (var i = 0; i < 10; i++) {
          if (i % 2 == 0) {
            var a = id[i];
            var x = int.parse(a) * 2;
            var b = x.toString();
            if (b.length == 1) {
              b = "0" + b;
            }
            sum += int.parse(b[0]) + int.parse(b[1]);
          } else {
            sum += int.parse(id[i]);
          }
        }
        return sum % 10 == 0;
      }
    } catch (err) {}
    return false;
  }
}