Drupal → Добавить на страницу данные о товаре в формате JSON-LD

/**
 * Implements hook_node_view().
 */
function hook_node_view($node, $view_mode, $langcode) {
  if ($node->type == 'product_display' && $view_mode == 'full') {
    $product_wrap = entity_metadata_wrapper('node', $node)->field_product;
    $product_price = $product_wrap->commerce_price->value();
 
    $jsonld = array(
      '@context' => 'http://schema.org/',
      '@type' => 'Product',
      'name' => $product_wrap->title->value(),
      'sku' => $product_wrap->sku->value(),
      'image' => $product_wrap->field_image->file->url->value(),
      'offers' => array(
        '@type' => 'Offer',
        'price' => commerce_currency_amount_to_decimal($product_price['amount'], $product_price['currency_code']),
        'priceCurrency' => $product_price['currency_code'],
      ),
    );
 
    drupal_add_html_head(array(
      '#tag' => 'script',
      '#attributes' => array('type' => 'application/ld+json'),
      '#value' => drupal_json_encode($jsonld),
    ), 'script_jsonld_product');
  }
}