gistfile1.php

<?php

require_once MODX_CORE_PATH . 'components/basket/processors/basket/web/public/action.class.php';

class modSiteWebPublicBasketActionProcessor extends modBasketWebPublicActionProcessor{
    
    public static function getInstance(modX &$modx,$className,$properties = array()) {
        
        // Здесь мы имеем возможность переопределить реальный класс процессора
        if(!empty($properties['basket_action']) && !self::$actualClassName){
             
            switch($properties['basket_action']){
                
                case 'products_add': 
                    require dirname(dirname(dirname(__FILE__))) . '/basket/orders/products/add.class.php';                    
                    self::$actualClassName =  'modSiteWebBasketOrdersProductsAddProcessor';
                    break; 
                
                default:;
            } 
        }
        
        return parent::getInstance($modx,$className,$properties);
    }     
    
}

return 'modSiteWebPublicBasketActionProcessor';