Custom themer module

class-kia-subtitle-bb.php

<?php
/**
 * @package		KIA Subtitle
 * @category	Compatibility Class
 * @version 	3.1.0
 */


if ( ! defined( 'ABSPATH' ) ) {
	exit; // Exit if accessed directly
}

class KIA_Subtitle_BB {

	/**
	 * Boot up Beaver Builder compat.
	 * @access public
	 * @return KIA_Subtitle
	 * @since  1.0
	 */
	public static function init() {

		// Add Beaver Builder Module.
		add_action( 'wp', array( __CLASS__, 'register_bb_module' ) );
		add_action( 'fl_page_data_add_properties', array( __CLASS__, 'add_bb_property' ) );

	}

	/*-----------------------------------------------------------------------------------*/
	/* Block Editor Functions */
	/*-----------------------------------------------------------------------------------*/


	/**
	 * Register a custom module for Beaver Builder
	 * 
	 * @since 3.1
	 * @return null
	 */
	public static function register_bb_module() {
		if ( class_exists( 'FLThemeBuilderLoader' ) ) {
			FLThemeBuilderLoader::load_modules( kia_subtitle::get_plugin_path() . '/includes/beaver-builder/' );
		}
	}

	/**
	 * Add subtitle as a post property
	 * 
	 * @since 3.1
	 * @return null
	 */
	public static function add_bb_property() {

		FLPageData::add_post_property( 'kia_subtitle', array(
			'label'       => __( 'Post Subtitle', 'kia-subtitle' ),
			'group'       => 'posts',
			'type'        => 'string',
			'getter'      => 'get_the_subtitle',
			'placeholder' => 'Lorem Ipsum Dolor',
		) );

	}


} // End class.

KIA_Subtitle_BB::init();

kia-subtitle.php

<?php
/**
 * Beaver Builder Module
 *
 * @class   KIA_Subtitle_Module
 * @package KIA Subtitle/Classes
 * @since   3.1.0
 */

if ( ! defined( 'ABSPATH' ) ) {
    exit;
}

/**
 * Heading module alias for the post subtitle.
 */
FLBuilder::register_module_alias( 'kia-post-subtitle', array(
    'module'      => 'heading',
    'name'        => __( 'Post Subtitle', 'kia-subtitle' ),
    'description' => __( 'Displays the subtitle for the current post.', 'kia-subtitle' ),
    'category'    => __( 'Post Modules', 'fl-theme-builder' ),
    'enabled'     => FLThemeBuilderLayoutData::current_post_is( 'singular' ),
    'settings'    => array(
        'tag'         => 'h2',
        'connections' => array(
            'heading' => (object) array(
                'object' => 'post',
                'property' => 'kia_subtitle',
                'field' => 'text',
            ),
        ),
    ),
) );