app
        .directive('formGroup', function ($location) {
            return {
                restrict: 'C',
                link: function ($scope, $element, attrs) {
                    if ($element.find('.form-control[ng-model], .form-control[data-ng-model]').length > 0) {
                        let formControl = $element.find('.form-control');
                        $scope.$watch(function () {
                            let model = formControl.data('$ngModelController');
                            return angular.isDefined(model) && model.$invalid;
                        }, function (value) {
                            let result = value;
                            if (result) {
                                $element.addClass('has-error');
                            } else {
                                $element.removeClass('has-error');
                            }
                        });
                    }
                }
            };
        });