SearchApiSubscriber.php in Facets 8

Namespace

Drupal\facets\EventSubscriber

File

src/EventSubscriber/SearchApiSubscriber.php

<?php

namespace Drupal\facets\EventSubscriber;

use Drupal\facets\FacetManager\DefaultFacetManager;
use Drupal\search_api\Event\QueryPreExecuteEvent;
use Drupal\search_api\Event\SearchApiEvents;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
class SearchApiSubscriber implements EventSubscriberInterface {

  /**
   * @var \Drupal\facets\FacetManager\DefaultFacetManager
   */
  private $facetManager;

  /**
   * Constructs a new class instance.
   *
   * @param \Drupal\facets\FacetManager\DefaultFacetManager $facetManager
   *   The messenger.
   */
  public function __construct(DefaultFacetManager $facetManager) {
    $this->facetManager = $facetManager;
  }

  /**
   * Reacts to the query alter event.
   *
   * @param \Drupal\search_api\Event\QueryPreExecuteEvent $event
   *   The query alter event.
   */
  public function queryAlter(QueryPreExecuteEvent $event) {
    $query = $event
      ->getQuery();
    if ($query
      ->getIndex()
      ->getServerInstance()
      ->supportsFeature('search_api_facets')) {

      // It's safe to hardcode this to the search api scheme because this is in
      // an event subscriber. If this generated source is not correct,
      // implementing the same subscriber and directly calling
      // $manager->alterQuery($query, $your_facetsource_id); will fix that.
      $facet_source = 'search_api:' . str_replace(':', '__', $query
        ->getSearchId());

      // Add the active filters.
      $this->facetManager
        ->alterQuery($query, $facet_source);
    }
  }

  /**
   * {@inheritdoc}
   */
  public static function getSubscribedEvents() {

    // Workaround to avoid a fatal error during site install from existing config.
    // @see https://www.drupal.org/project/facets/issues/3199156
    if (!class_exists('\\Drupal\\search_api\\Event\\SearchApiEvents', TRUE)) {
      return [];
    }
    return [
      SearchApiEvents::QUERY_PRE_EXECUTE => 'queryAlter',
    ];
  }

}

Classes

Name	Description
SearchApiSubscriber