class Current

class Current extends BooleanOperator {
  
  /**
   * {@inheritdoc}
   */
  public function init(ViewExecutable $view, DisplayPluginBase $display, ?array &$options = NULL) {
    parent::init($view, $display, $options);
    $this->value_value = $this->t('Is the logged in user');
  }
  
  /**
   * {@inheritdoc}
   */
  public function query() {
    $this->ensureMyTable();
    $field = $this->tableAlias . '.' . $this->realField . ' ';
    $or = $this->view->query
      ->getConnection()
      ->condition('OR');
    if (empty($this->value)) {
      $or->condition($field, '***CURRENT_USER***', '<>');
      if ($this->accept_null) {
        $or->isNull($field);
      }
    }
    else {
      $or->condition($field, '***CURRENT_USER***', '=');
    }
    $this->query
      ->addWhere($this->options['group'], $or);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getCacheContexts() {
    $contexts = parent::getCacheContexts();
    // This filter depends on the current user.
    $contexts[] = 'user';
    return $contexts;
  }

}