83 lines
1.9 KiB
PHP
83 lines
1.9 KiB
PHP
<?php
|
|
/**
|
|
* WC Queue
|
|
*
|
|
* @version 3.5.0
|
|
* @package WooCommerce/Interface
|
|
*/
|
|
|
|
if ( ! defined( 'ABSPATH' ) ) {
|
|
exit; // Exit if accessed directly.
|
|
}
|
|
|
|
/**
|
|
* WC Queue
|
|
*
|
|
* Singleton for managing the WC queue instance.
|
|
*
|
|
* @version 3.5.0
|
|
*/
|
|
class WC_Queue {
|
|
|
|
/**
|
|
* The single instance of the queue.
|
|
*
|
|
* @var WC_Queue_Interface|null
|
|
*/
|
|
protected static $instance = null;
|
|
|
|
/**
|
|
* The default queue class to initialize
|
|
*
|
|
* @var string
|
|
*/
|
|
protected static $default_cass = 'WC_Action_Queue';
|
|
|
|
/**
|
|
* Single instance of WC_Queue_Interface
|
|
*
|
|
* @return WC_Queue_Interface
|
|
*/
|
|
final public static function instance() {
|
|
|
|
if ( is_null( self::$instance ) ) {
|
|
$class = self::get_class();
|
|
self::$instance = new $class();
|
|
self::$instance = self::validate_instance( self::$instance );
|
|
}
|
|
return self::$instance;
|
|
}
|
|
|
|
/**
|
|
* Get class to instantiate
|
|
*
|
|
* And make sure 3rd party code has the chance to attach a custom queue class.
|
|
*
|
|
* @return string
|
|
*/
|
|
protected static function get_class() {
|
|
if ( ! did_action( 'plugins_loaded' ) ) {
|
|
wc_doing_it_wrong( __FUNCTION__, __( 'This function should not be called before plugins_loaded.', 'woocommerce' ), '3.5.0' );
|
|
}
|
|
|
|
return apply_filters( 'woocommerce_queue_class', self::$default_cass );
|
|
}
|
|
|
|
/**
|
|
* Enforce a WC_Queue_Interface
|
|
*
|
|
* @param WC_Queue_Interface $instance Instance class.
|
|
* @return WC_Queue_Interface
|
|
*/
|
|
protected static function validate_instance( $instance ) {
|
|
if ( false === ( $instance instanceof WC_Queue_Interface ) ) {
|
|
$default_class = self::$default_cass;
|
|
/* translators: %s: Default class name */
|
|
wc_doing_it_wrong( __FUNCTION__, sprintf( __( 'The class attached to the "woocommerce_queue_class" does not implement the WC_Queue_Interface interface. The default %s class will be used instead.', 'woocommerce' ), $default_class ), '3.5.0' );
|
|
$instance = new $default_class();
|
|
}
|
|
|
|
return $instance;
|
|
}
|
|
}
|