jsonapi_extras-8.x-3.16/src/Plugin/jsonapi/FieldEnhancer/DateTimeEnhancer.php

<?php

namespace Drupal\jsonapi_extras\Plugin\jsonapi\FieldEnhancer;

use Drupal\Core\Datetime\DrupalDateTime;
use Drupal\Core\StringTranslation\TranslatableMarkup;
use Drupal\jsonapi_extras\Attribute\ResourceFieldEnhancer;
use Drupal\jsonapi_extras\Plugin\DateTimeEnhancerBase;
use Shaper\Util\Context;

/**
 * Perform additional manipulations to timestamp fields.
 */
#[ResourceFieldEnhancer(
  id: 'date_time',
  label: new TranslatableMarkup('Date Time (Timestamp field)'),
  description: new TranslatableMarkup('Formats a date based the configured date format for timestamp fields.'),
  dependencies: ['datetime'],
)]
class DateTimeEnhancer extends DateTimeEnhancerBase {

  /**
   * {@inheritdoc}
   */
  protected function doUndoTransform($data, Context $context) {
    $date = new \DateTime();
    $date->setTimestamp(is_int($data)
      ? $data
      : (new DrupalDateTime($data))->getTimestamp()
    );
    $configuration = $this->getConfiguration();

    return $date->format($configuration['dateTimeFormat']);
  }

  /**
   * {@inheritdoc}
   */
  protected function doTransform($data, Context $context) {
    $date = new \DateTime($data);
    return (int) $date->format('U');
  }

}