{if !$product}
   {$product = $body.product}
{/if}

{$js_favorites = [
'productId' => intval($product.id),
'title' => "{$product.title}",
'gtmAddToWishlist' => {get_gtm_data encode=true type='ecommerce' method='AddToWishList' data=['products' => [$product], 'listType' => $listType, 'listId' => $listId]}
]}
<div data-js-favorites-product="{$js_favorites|json_encode}">
   <a href="{url s=login}" class="cart-signin btn-favorites"><span class="fc icons_heart"></span><span class="text">{$favorties_text|default:"{t}Přidat mezi oblíbené{/t}"}</span></a>
</div>