Свойства заказа в интернет-магазине

<?php
use Bitrix\Main\Loader;

//Вызывается перед добавлением записи в корзину
AddEventHandler('sale', 'OnBeforeBasketAdd', array('CCustomSaleHandlers', 'addPropertiesToBasket'));

class CCustomSaleHandlers {
   ...
   public static function addPropertiesToBasket(&$arFields) {
      if (Loader::includeModule('iblock')) {
         $arFilter = array('ID' => $arFields['PRODUCT_ID']);
         $arSelect = array();
         foreach (self::$arProperties as $sProp => $sTitle) {
            $arSelect[] = 'PROPERTY_' . $sProp;
         }
         $rsElement = CIBlockElement::GetList(array('SORT' => 'ASC'), $arFilter, false, false, $arSelect);
         $iCount = count($arFields['PROPS']);
         if ($arElement = $rsElement->GetNext()) {
            foreach (self::$arProperties as $sProp => $sTitle) {
               $bUpdate = false;
               if ($iCount > 0) {
                  foreach ($arFields['PROPS'] as $iKey => $arProp) {
                     if (($arProp['CODE'] == $sProp) && (strlen($arElement['PROPERTY_' . $sProp . '_VALUE']) > 0)) {
                        $arFields['PROPS'][$iKey] = array(
                           'NAME'  => $sTitle,
                           'CODE'  => $sProp,
                           'VALUE' => $arElement['PROPERTY_' . $sProp . '_VALUE'],
                           'SORT'  => 0
                        );
                        
                        $bUpdate = true;
                     }
                  }
               }
               
               if (!$bUpdate && (strlen($arElement['PROPERTY_' . $sProp . '_VALUE']) > 0))
                  $arFields['PROPS'][] = array(
                     'NAME'  => $sTitle,
                     'CODE'  => $sProp,
                     'VALUE' => $arElement['PROPERTY_' . $sProp . '_VALUE'],
                     'SORT'  => 0
                  );
            }
         }
      }
      return;
   }
   ...
}