<?php

/**
 * @file
 * Provides a service to manage file metadata.
 */

use \Drupal\Core\Entity\EntityInterface;

/**
 * Implements hook_cache_flush().
 */
function file_mdm_cache_flush() {
  return array('file_mdm');
}

/**
 * Implements hook_file_delete().
 */
function file_mdm_file_delete(EntityInterface $entity) {
  // Deletes any cached file metadata information upon deletion of a file
  // entity.
  $fmdm = \Drupal::service('file_metadata_manager');
  $fmdm->deleteCachedMetadata($entity->getFileUri());
  $fmdm->release($entity->getFileUri());
}