Bitrix. How to find out if a product has a gift in the product list?

Question

1C-Bitrix

Hello. The task is to display the "Gift" icon if gifts are attached to the product. Gifts are connected through the basket rule in the admin panel in the "Marketing" section. In the product card, I display this icon like this:

<?if ($arResult['CATALOG'] && $arParams['USE_GIFTS_DETAIL'] == 'Y' && \Bitrix\Main\ModuleManager::isModuleInstalled("sale")){?>
            <?	
              $foo = new DiscountsHelper();
              $funcname = "getGiftIds";
              $isad = $foo->$funcname($arResult["ID"]);  
            ?>	
            <?if(!empty($isad)):?>
              <div class="gift-wrap"></div>
            <?endif;?>
          <?}?>

in the list is not obtained .... Gives a php error. Tried to connect
use Bitrix\Main\Loader;
use Bitrix\Main\ModuleManager;
in the product list, but it does not help.

Answer 1

Understood it was necessary to insert

use Bitrix\Sale\Compatible\DiscountCompatibility;
use Bitrix\Sale\Basket;
use Bitrix\Sale\Discount\Gift;
use Bitrix\Sale\Fuser;

class DiscountsHelper
{
    /**
     * Возвращает массив id всех доступных подарков для товара
     *
     * @param int $productId - идентификатор товара
     * @return array - массив с id подарков для товара
     */
    public static function getGiftIds($productId)
    {
        $giftProductIds = [];

        if (!$productId) {
            return $giftProductIds;
        }

        DiscountCompatibility::stopUsageCompatible();

        $giftManager = Gift\Manager::getInstance();

        $potentialBuy = [
            'ID'                     => $productId,
            'MODULE'                 => 'catalog',
            'PRODUCT_PROVIDER_CLASS' => 'CCatalogProductProvider',
            'QUANTITY'               => 1,
        ];

        $basket = Basket::loadItemsForFUser(Fuser::getId(), SITE_ID);
        
        $basketPseudo = $basket->copy();

        foreach ($basketPseudo as $basketItem) {
            $basketItem->delete();
        }

        $collections = $giftManager->getCollectionsByProduct($basketPseudo, $potentialBuy);

        foreach ($collections as $collection) {
            /** @var \Bitrix\Sale\Discount\Gift\Gift $gift */
            foreach ($collection as $gift) {
                $giftProductIds[] = $gift->getProductId();
            }
        }

        DiscountCompatibility::revertUsageCompatible();

        return $giftProductIds;
    }
}