[Forminator Pro] - Send email to listing's author. Extend existing functionality of Easy Property Listing to send email to listing's author

wpmudev-forminator-listing-author.php

<?php
/**
* Plugin Name: [Forminator Pro] - Send email to listing's author
* Plugin URI: https://premium.wpmudev.org/
* Description: Extend existing functionality of Easy Property Listing to send email to listing's author (as of 1.9)
* Author: Alessandro Kaounas @ WPMUDEV
* Author URI: https://premium.wpmudev.org/
* License: GPLv2 or later
*/

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

if ( ! class_exists( 'WPMUDEV_Forminator_Listing_Author' ) ) {
    
    class WPMUDEV_Forminator_Listing_Author {

        private static $_instance = null;

        public static function get_instance() {

            if( is_null( self::$_instance ) ){
                self::$_instance = new WPMUDEV_Forminator_Listing_Author();
            }
            return self::$_instance;
            
        }

        private function __construct() {
            add_filter( 'forminator_form_get_admin_email_recipients', array( $this, 'wpmudev_forminator_author_email' ), 20, 5 );
        }
	
		function wpmudev_forminator_author_email( $recipients, $notification, $data, $custom_form, $entry ){


            if( isset( $data['page_id'] ) ){
                $listing_id = $data['page_id'];
            }else{
                $listing_id = url_to_postid( wp_get_referer() );
                if( !isset( $listing_id ) ) return $recipients;
            }

            // Add post author email to recipients
            $recipients[] = get_the_author_meta( 'user_email', get_post_field( 'post_author', $listing_id ) );
            
            return $recipients;


        }
        

	}
	
    if ( ! function_exists( 'WPMUDEV_Forminator_Listing_Author' ) ) {
        
        function WPMUDEV_Forminator_Listing_Author() {
            return WPMUDEV_Forminator_Listing_Author::get_instance();
        };

        add_action( 'plugins_loaded', 'WPMUDEV_Forminator_Listing_Author', 99 );
    }

}