Issue #3303327: Error when add booking

use Drupal\smart_date\SmartDateTrait;

/**

 * Wrapper around the Smart Date Date Formatter as needed

 * Wrapper around the Smart Date Date Formatter as needed.

 */

class DateFormatter {

  use SmartDateTrait;

  /**

   * Take a start/end date and format it matching the

   * Smart Date Formatter

   * Take a start/end date and format it matching the Smart Date Formatter.

   *

   * @param string $start_ts

   *   Start date timestamp.

   * @param string $end_ts

   *   End date timestamp.

   *

   * @return string

   *   Formatted date string.

   */

  public static function formatDateToBooking($start_ts, $end_ts) {

    $service = \Drupal::service('entity_display.repository');

    $view_display = $service->getViewDisplay('booking', 'booking', 'default');

    $view_options = $view_display->get('content')['booking_date'];

    if (!is_null($view_options)) {

      $smart_date_format = \Drupal::entityTypeManager()->getStorage('smart_date_format')

      ->load($view_options['settings']['format']);

      $options = $smart_date_format->getOptions();

    }

    else {

      $options = [

        'date_format' => 'l, F j, Y - H:i',

      ];

    }

    $timezone = date_default_timezone_get();

    $date = self::formatSmartDate($start_ts, $end_ts, $options, $timezone);

    $output = '';

    }

    return $output;

  }

}