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