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(function registerDragParameters()
    {
        $(document).ready(function() {

            var $editForm = $('button[name=btn_update_and_edit], button[name=btn_update_and_list]').parents('form:first');

            function isParameterValid(paramValue) {
                var protoParams = availableParameters.filter(function(entry) {
                     return entry.value == paramValue;
                });

                return protoParams[0];
            }

            function loadDragParametersFromAllInstances(parameters) {
                for(var instanceName in CKEDITOR.instances) {

                    var parametersTextInOneInstance =

                        $(CKEDITOR.instances[instanceName].window.getFrame().$)
                            .contents()
                            .find('.drag-parameter-inside')
                            .map(function() {
                                return $.trim($(this).text());
                            }).get();

                    Array.prototype.push.apply(parameters, parametersTextInOneInstance);
                }
            }

            function registerParametersCall(parameters) {
                var currentTemplateId = $('form[method="post"] input.template-id').val();


                $.ajax({
                    type: "PUT",
                    contentType: "application/json",
                    url: "/api/template/" + currentTemplateId +"/parameters",
                    data: JSON.stringify(parameters),
                    complete: function(xhr, textStatus) {
                        if (xhr.status != 200) {
                            alert('Sorry, we have a problem with template administration');
                        } else {
                            // detach handler and submit form data
                            sendForm();
                        }
                    }
                });
            }

            function sendForm()
            {
                $editForm.off("submit");
                $editForm.submit();
            }

            $editForm.submit(function(e) {

                e.preventDefault();

                if(window.localStorage !== undefined) {

                    var parameters = [];

                    if (isCKEditorPresent()) {
                        loadDragParametersFromAllInstances(parameters)
                    } else {
                        alert('Please wait until CKEditor has been loaded');
                        e.preventDefault();
                        return;
                    }

                    if (parameters.length > 0) {

                        var paramsOnRegistration = [];
                        parameters.forEach(function (param) {
                            var protoParam = isParameterValid(param);

                            if (protoParam != null) {
                                paramsOnRegistration.push(protoParam);
                            }
                        });

                        if (paramsOnRegistration.length > 0) {
                            registerParametersCall(paramsOnRegistration);
                        }

                    } else { sendForm(); }

                } else {  alert("Browser Local storage failed. Try refreshing your browser"); }

            });

        });

    })();