class Date

class Date extends Formula implements ContainerFactoryPluginInterface {
  
  /**
   * The date format used in the title.
   *
   * @var string
   */
  protected $format;
  
  /**
   * The date format used in the query.
   *
   * @var string
   */
  protected $argFormat = 'Y-m-d';
  public $option_name = 'default_argument_date';
  
  /**
   * The route match.
   *
   * @var \Drupal\Core\Routing\RouteMatchInterface
   */
  protected $routeMatch;
  
  /**
   * The date formatter service.
   *
   * @var \Drupal\Core\Datetime\DateFormatterInterface
   */
  protected $dateFormatter;
  
  /**
   * Constructs a new Date instance.
   *
   * @param array $configuration
   *   A configuration array containing information about the plugin instance.
   * @param string $plugin_id
   *   The plugin_id for the plugin instance.
   * @param mixed $plugin_definition
   *   The plugin implementation definition.
   * @param \Drupal\Core\Routing\RouteMatchInterface $route_match
   *   The route match.
   * @param \Drupal\Core\Datetime\DateFormatterInterface $date_formatter
   *   The date formatter service.
   */
  public function __construct(array $configuration, $plugin_id, $plugin_definition, RouteMatchInterface $route_match, DateFormatterInterface $date_formatter) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->routeMatch = $route_match;
    $this->dateFormatter = $date_formatter;
  }
  
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container->get('current_route_match'), $container->get('date.formatter'));
  }
  
  /**
   * Add an option to set the default value to the current date.
   */
  public function defaultArgumentForm(&$form, FormStateInterface $form_state) {
    parent::defaultArgumentForm($form, $form_state);
    $form['default_argument_type']['#options'] += [
      'date' => $this->t('Current date'),
    ];
    $form['default_argument_type']['#options'] += [
      'node_created' => $this->t("Current node's creation time"),
    ];
    $form['default_argument_type']['#options'] += [
      'node_changed' => $this->t("Current node's update time"),
    ];
  }
  
  /**
   * Gets the date default argument, formatted appropriately for this argument.
   */
  public function getDefaultArgument($raw = FALSE) {
    if (!$raw && $this->options['default_argument_type'] == 'date') {
      return date($this->argFormat, REQUEST_TIME);
    }
    elseif (!$raw && in_array($this->options['default_argument_type'], [
      'node_created',
      'node_changed',
    ])) {
      $node = $this->routeMatch
        ->getParameter('node');
      if (!$node instanceof NodeInterface) {
        return parent::getDefaultArgument();
      }
      elseif ($this->options['default_argument_type'] == 'node_created') {
        return date($this->argFormat, $node->getCreatedTime());
      }
      elseif ($this->options['default_argument_type'] == 'node_changed') {
        return date($this->argFormat, $node->getChangedTime());
      }
    }
    return parent::getDefaultArgument($raw);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getSortName() {
    return $this->t('Date', [], [
      'context' => 'Sort order',
    ]);
  }
  
  /**
   * {@inheritdoc}
   */
  public function getFormula() {
    $this->formula = $this->getDateFormat($this->argFormat);
    return parent::getFormula();
  }

}