class Access

class Access extends FilterPluginBase {
  public function adminSummary() {
  }
  protected function operatorForm(&$form, FormStateInterface $form_state) {
  }
  public function canExpose() {
    return FALSE;
  }
  
  /**
   * See _node_access_where_sql() for a non-views query based implementation.
   */
  public function query() {
    $account = $this->view
      ->getUser();
    if (!$account->hasPermission('bypass node access')) {
      $table = $this->ensureMyTable();
      $grants = $this->query
        ->getConnection()
        ->condition('OR');
      foreach (node_access_grants('view', $account) as $realm => $gids) {
        foreach ($gids as $gid) {
          $grants->condition($this->query
            ->getConnection()
            ->condition('AND')
            ->condition($table . '.gid', $gid)
            ->condition($table . '.realm', $realm));
        }
      }
      $this->query
        ->addWhere('AND', $grants);
      $this->query
        ->addWhere('AND', $table . '.grant_view', 1, '>=');
    }
  }
  
  /**
   * {@inheritdoc}
   */
  public function getCacheContexts() {
    $contexts = parent::getCacheContexts();
    $contexts[] = 'user.node_grants:view';
    return $contexts;
  }

}