Extend Class for Events Manager für event list

Hi!

Could you extend the class for Events Manager for the event list using the following code?

<?php
/**
 * Class for Events Manager
 *
 * @link       https://xylusthemes.com/
 * @since      1.0.0
 *
 * @package    Event_Schema
 * @subpackage Event_Schema/includes
 */
// Exit if accessed directly.
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

class Event_Schema_EM {

	// The Events Calendar Event Taxonomy
	protected $taxonomy;

	// The Events Calendar Event Posttype
	protected $event_posttype;

	// The Events Calendar Venue Posttype
	protected $venue_posttype;

	/**
	 * Initialize the class and set its properties.
	 *
	 * @since    1.0.0
	 */
	public function __construct() {
		
		if ( defined( 'EM_POST_TYPE_EVENT' ) ) {
			$this->event_posttype = EM_POST_TYPE_EVENT;
		} else {
			$this->event_posttype = 'event';
		}
		if ( defined( 'EM_TAXONOMY_CATEGORY' ) ) {
			$this->taxonomy = EM_TAXONOMY_CATEGORY;
		} else {
			$this->taxonomy = 'event-categories';
		}
		if ( defined( 'EM_POST_TYPE_LOCATION' ) ) {
			$this->venue_posttype = EM_POST_TYPE_LOCATION;
		} else {
			$this->venue_posttype = 'location';
		}
		$schema_options = get_option( ES_OPTIONS , array() );
		if( !in_array( 'event_organizer', $schema_options ) ){
			add_action( 'wp_footer', array( $this, 'render_event_structured_data' ) );
			add_filter( 'em_events_output', array( $this, 'render_event_list_structured_data' ), 10, 2 );
		}
	}

	/**
	 * Get Posttype and Taxonomy Functions
	 *
	 * @return string
	 */
	public function get_event_posttype(){
		return $this->event_posttype;
	}	
	public function get_venue_posttype(){
		return $this->venue_posttype;
	}
	public function get_taxonomy(){
		return $this->taxonomy;
	}

	/**
	 * Render ld+json schema for Event.
	 *
	 * @since 1.0.0
	 */
	public function render_event_structured_data($ao_event = null){
		
		if( is_singular( $this->event_posttype ) || is_object($ao_event)){
			global $event_schema, $wpdb, $post;
			$event_id = is_object($ao_event) ? $ao_event->post_id : get_the_ID();
			$start_date = get_post_meta( $event_id, '_event_start_date', true );
			if( $start_date == '' ){
				return;
			}
			$name = is_object($ao_event) ? get_the_title($ao_event->post_id) : get_the_title();
			$description = is_object($ao_event) ? '' : $post->post_excerpt;
			if( trim( $description ) == '' ){
				$description = addslashes( preg_replace('/((\w+\W*){54}(\w+))(.*)/', '${1}', is_object($ao_event) ? $ao_event->post_content : $post->post_content) );
			}
			$event_url   = is_object($ao_event) ? get_permalink($ao_event->post_id) : get_permalink();
			$image_url = "";
			if( has_post_thumbnail( $event_id ) ){
				$image_url = get_the_post_thumbnail_url( $event_id , 'full' );
			}
			$is_all_day = get_post_meta( $event_id, '_event_all_day', true );
			$start_date = get_post_meta( $event_id, '_event_start_date', true );
			$end_date = get_post_meta( $event_id, '_event_end_date', true );
			$start_time = get_post_meta( $event_id, '_event_start_time', true );
			$end_time = get_post_meta( $event_id, '_event_end_time', true );
			if( $is_all_day ){
				$start_time = '00:00';
				$end_time = '23:59';
			}
			$start_datetime = $start_date.'T'.$start_time;
			$start_datetime = $end_date.'T'.$end_time;
			$centralize_event = array(
				"ID"         => $event_id,
				"name"       => $name,
				"description"=> $description,
				"url"        => $event_url,
				"start_date" => $start_date,
				"end_date"   => $end_date,
				"is_all_day" => $is_all_day,
				"image"      => $image_url,
			);

			$is_location_enabled = get_option( 'dbem_locations_enabled', false );
			if( $is_location_enabled ){
				$location_id = get_post_meta( $event_id, '_location_id', true );
				$event_location = $wpdb->get_row( $wpdb->prepare( "SELECT * FROM " . $wpdb->prefix. "em_locations WHERE location_id = %d", $location_id ) );
				if( ! empty( $event_location ) ){
					$centralize_event['location'] = array(
						"name" => isset( $event_location->location_name ) ? esc_attr( $event_location->location_name ) : '',
						"telephone" => '',
						"url" => '',
					);
					$address = array();					
					$address['street_address'] =  isset( $event_location->location_address ) ? esc_attr( $event_location->location_address ) : '';
					$address['address_locality'] =  isset( $event_location->location_town ) ? esc_attr( $event_location->location_town ) : '';
					$address['address_region'] =  isset( $event_location->location_state ) ? esc_attr( $event_location->location_state ) : '';
					$address['address_country'] =  isset( $event_location->location_country ) ? esc_attr( $event_location->location_country ) : '';
					$address['postal_code'] =  isset( $event_location->location_postcode ) ? esc_attr( $event_location->location_postcode ) : '';
					$centralize_event['location']['address'] = $address;
					$event_lat = isset( $event_location->location_latitude ) ? esc_attr( $event_location->location_latitude ) : '';
					$event_lon = isset( $event_location->location_longitude ) ? esc_attr( $event_location->location_longitude ) : '';
					if( $event_lat != '' && $event_lon != '' ){
						$centralize_event['location']['geo'] = array(
								"latitude"  => $event_lat,
								"longitude" => $event_lon,
							);
					}
				}
			}

			if( get_post_meta( $event_id, '_event_rsvp', true ) && get_option( 'dbem_rsvp_enabled', false ) ){
				$emevent_id = get_post_meta( $event_id, '_event_id', true );
				$event_tikets = $wpdb->get_row( $wpdb->prepare( "SELECT MAX(ticket_price) AS max_ticket, MIN(ticket_price) AS min_ticket FROM " . $wpdb->prefix. "em_tickets WHERE event_id = %d", $emevent_id ) );
				if( !empty( $event_tikets ) ){
					$offers = array();
					$offers['url'] = $event_url;
					if( $event_tikets->max_ticket == $event_tikets->min_ticket ){
						$offers['high_price'] = $event_tikets->max_ticket;
						$offers['price'] = $event_tikets->max_ticket;
					}else{
						$offers['price'] = $event_tikets->min_ticket;
						$offers['low_price'] = $event_tikets->min_ticket;
						$offers['high_price'] = $event_tikets->max_ticket;
					}
					$offers['price_currency'] = get_option( 'dbem_bookings_currency' );
					$centralize_event['offers'] = $offers;
				}
			}
			// Render it.
			echo $event_schema->common->generate_ldjson( $centralize_event );
		}		
	}
	
	/**
	 * Render ld+json schema for Event-List.
	 */
	public function render_event_list_structured_data($as_output, $aa_events){
		foreach($aa_events as $lo_event){
			$this->render_event_structured_data($lo_event);
		}
		
		return $as_output;
	}

}

Regards!