[Forminator Pro] - Support conditional relative select fields

forminator-conditional-relative-select-fields.php

<?php
/**
 * Plugin Name: [Forminator Pro] - Support conditional relative select fields
 * Description: [Forminator Pro] - Support conditional relative select fields - the selected option on select field A will not available on select field B - 1155684028615381
 * Author: Thobk @ WPMUDEV
 * Author URI: https://premium.wpmudev.org
 * License: GPLv2 or later
 */
if ( ! defined( 'ABSPATH' ) || ( defined( 'WP_CLI' ) && WP_CLI ) ) {
	return;
}

add_action( 'after_setup_theme', 'wpmudev_forminator_support_conditional_relative_select_field_func', 100 );

function wpmudev_forminator_support_conditional_relative_select_field_func() {
	if ( defined('FORMINATOR_PRO') && class_exists( 'Forminator' ) ) {
		
		add_action( 'wp_footer', 'wpmudev_forminator_support_conditional_relative_select_field', 21 );

		function wpmudev_forminator_support_conditional_relative_select_field(){
			echo "<script type='text/javascript'>(function ($, document, window) {
				'use strict';
				$(function () {
					if (typeof ($.fn.forminatorLoader) === 'undefined') {
						// nothing to do here
					} else {
						$(document).on('after.load.forminator', function(e, form_id){
							let _form = $('#forminator-module-'+ form_id);
							if( _form.length ){
								let _relative_select_field_wrappers = _form.find('.wpmudev-relative-select-field');
								if( _relative_select_field_wrappers.length ){
									let _main_selects = {};
									_relative_select_field_wrappers.each( function(){
										let _id = $(this).attr('id') +'-field',
											_that = $(this),
											_stop_reverse = ! _that.hasClass('wpmudev-reversing'); //enable this to stop change on reverse field
										if( _id ){
											let _oppo_select = _form.find('.wpmudev-relative-select-field.'+ _id).find('select');
											_form.find('#'+ _id).data('wpmudev-opposite', _oppo_select );

											if( _stop_reverse && ! ( _id in _main_selects ) ){
												_main_selects[ _oppo_select.attr('id') ] = 1;
											}
										}

										_that.on('change', 'select', function(){
											if( _stop_reverse && $(this).attr('id') in _main_selects ){
												return;
											}
											let _oppo_select = $(this).data('wpmudev-opposite');
											if( _oppo_select.length ){
												var _disabled_option = _oppo_select.find('option[value='+ $(this).val() +']');
												if( _disabled_option.length ){
													let _select_list_wrapper = _oppo_select.next('.forminator-select-list');
													if( _select_list_wrapper.length ){
														if( _disabled_option.text() === _select_list_wrapper.children('.forminator-value').text() ){
															let _text = '';
															if( _disabled_option.next('option').length ){
																_text = _disabled_option.next('option').text();
															}else if( _disabled_option.prev('option').length ){
																_text = _disabled_option.prev('option').text();
															}
															_select_list_wrapper.children('.forminator-value').text( _text );
														}
														_select_list_wrapper.find('.forminator-dropdown-list').find('li').eq(_disabled_option.index()).removeClass('current').hide().addClass('disabled').siblings('.disabled').show();
													}
												}
											}
										});
									});
								}
							}
						});
					}
				});
			}(window.jQuery, document, window))</script>";
		}
	}
}