SearchEmbeddedFormThemeHooks.php

<?php

declare (strict_types=1);
namespace Drupal\search_embedded_form\Hook;

use Drupal\Core\Form\FormBuilderInterface;
use Drupal\Core\Hook\Attribute\Hook;

/**
 * Theme hook implementations for search_embedded_form module.
 *
 * A sample use of an embedded form is an e-commerce site where each search
 * result may include an embedded form with buttons like "Add to cart" for each
 * individual product (node) listed in the search results.
 */
class SearchEmbeddedFormThemeHooks {
  public function __construct(protected FormBuilderInterface $formBuilder) {
  }
  
  /**
   * Implements hook_preprocess_HOOK().
   */
  public function preprocessSearchResult(&$variables) : void {
    $form = $this->formBuilder
      ->getForm('Drupal\\search_embedded_form\\Form\\SearchEmbeddedForm');
    $variables['snippet'] = array_merge($variables['snippet'], $form);
  }

}