FeedStorageInterface.php

<?php

namespace Drupal\aggregator;

use Drupal\Core\Entity\ContentEntityStorageInterface;

/**
 * Defines an interface for aggregator feed entity storage classes.
 */
interface FeedStorageInterface extends ContentEntityStorageInterface {
    
    /**
     * Denotes that a feed's items should never expire.
     */
    const CLEAR_NEVER = 0;
    
    /**
     * Returns the fids of feeds that need to be refreshed.
     *
     * @return array
     *   A list of feed ids to be refreshed.
     */
    public function getFeedIdsToRefresh();

}