Date.php

<?php

namespace Drupal\datetime\Plugin\views\argument;

use Drupal\Component\Datetime\TimeInterface;
use Drupal\Core\Datetime\DateFormatterInterface;
use Drupal\Core\Routing\RouteMatchInterface;
use Drupal\datetime\Plugin\Field\FieldType\DateTimeItem;
use Drupal\views\Attribute\ViewsArgument;
use Drupal\views\FieldAPIHandlerTrait;
use Drupal\views\Plugin\views\argument\Date as NumericDate;

/**
 * Abstract argument handler for dates.
 *
 * Adds an option to set a default argument based on the current date.
 *
 * Definitions terms:
 * - many to one: If true, the "many to one" helper will be used.
 * - invalid input: A string to give to the user for obviously invalid input.
 *                  This is deprecated in favor of argument validators.
 *
 * @see \Drupal\views\ManyToOneHelper
 *
 * @ingroup views_argument_handlers
 */
class Date extends NumericDate {
    use FieldAPIHandlerTrait;
    
    /**
     * Determines if the timezone offset is calculated.
     *
     * @var bool
     */
    protected $calculateOffset = TRUE;
    
    /**
     * {@inheritdoc}
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition, RouteMatchInterface $route_match, DateFormatterInterface $date_formatter, TimeInterface $time) {
        parent::__construct($configuration, $plugin_id, $plugin_definition, $route_match, $date_formatter, $time);
        $definition = $this->getFieldStorageDefinition();
        if ($definition->getSetting('datetime_type') === DateTimeItem::DATETIME_TYPE_DATE) {
            // Timezone offset calculation is not applicable to dates that are stored
            // as date-only.
            $this->calculateOffset = FALSE;
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDateField() {
        // Use string date storage/formatting since datetime fields are stored as
        // strings rather than UNIX timestamps.
        return $this->query
            ->getDateField("{$this->tableAlias}.{$this->realField}", TRUE, $this->calculateOffset);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getDateFormat($format) {
        // Pass in the string-field option.
        return $this->query
            ->getDateFormat($this->getDateField(), $format, TRUE);
    }

}