Admin JS

function getSaveFields()
{
    let $process_elements   = jQuery('#admin_content input, #admin_content select');
    let response            = {};

    $process_elements.each(function(index, element)
    {
        if(element.name == '')
        {
            return true;
        }

        let $element        = jQuery(element);
        let element_val     = jQuery.trim($element.val());

        if(element_val != '')
        {
            if(((element.type == 'checkbox' || element.type == 'radio') && $element.is(':checked')) || (element.type != 'checkbox' && element.type != 'radio') || element.nodeName == 'SELECT')
            {
                if(element.name.indexOf('[') != -1)
                {
                    let names = element.name.split('[');

                    //a main position exists alywas so we can directly assign it
                    let main_position = names.shift();

                    //a sub position exists too but we need to check if it has a name or not
                    let sub_position =  names.shift().replace(']', '').toString();

                    //depending on the sub_position string we need to create an object or an array if the main is not set already
                    if(typeof response[main_position] == 'undefined')
                    {
                        if(sub_position != '')
                        {
                            response[main_position] = {};
                        }
                        else
                        {
                            response[main_position] = [];
                        }
                    }

                    if(sub_position == '')
                    {
                        response[main_position].push(element_val);
                    }
                    else
                    {
                        let sub_sub_position = undefined;

                        if(names.length > 0)
                        {
                            sub_sub_position = names.shift().replace(']', '').toString();
                        }

                        if(typeof sub_sub_position == 'undefined')
                        {
                            response[main_position][sub_position] = element_val;
                        }
                        else
                        {
                            //only create the object/array if it is not defined
                            if(typeof response[main_position][sub_position] == 'undefined')
                            {
                                if(sub_sub_position != '')
                                {
                                    response[main_position][sub_position] = {};
                                }
                                else
                                {
                                    response[main_position][sub_position] = [];
                                }
                            }

                            if(sub_sub_position == '')
                            {
                                response[main_position][sub_position].push(element_val);
                            }
                            else
                            {
                                response[main_position][sub_position][sub_sub_position] = element_val;
                            }
                        }
                    }
                }
                else
                {
                    response[element.name] = element_val;
                }
            }
        }
    });

    return response;
}