contacts_events-8.x-1.x-dev/src/DateRangeFormatter.php

<?php

namespace Drupal\contacts_events;

use Drupal\Core\Datetime\DateFormatterInterface;
use Drupal\Core\Datetime\DrupalDateTime;

/**
 * Provides a date range formatter.
 */
class DateRangeFormatter implements DateRangeFormatterInterface {
  /**
   * The core date formatter.
   *
   * @var \Drupal\Core\Datetime\DateFormatterInterface
   */
  protected $dateFormatter;

  /**
   * Constructs the date range formatter service.
   *
   * @param \Drupal\Core\Datetime\DateFormatterInterface $date_formatter
   *   The core date formatter.
   */
  public function __construct(DateFormatterInterface $date_formatter) {
    $this->dateFormatter = $date_formatter;
  }

  /**
   * {@inheritdoc}
   */
  public function formatDateTimeRange($start_timestamp, $end_timestamp, $type = 'medium', $timezone = NULL, $langcode = NULL) {
    $start_date_time = DrupalDateTime::createFromTimestamp($start_timestamp, $timezone);
    $end_date_time = DrupalDateTime::createFromTimestamp($end_timestamp, $timezone);
    $separator = ' - ';

    // Strings containing the ISO-8601 representations of the start and end
    // datetime can be used to determine if the date and/or time are the same.
    $start_iso_8601 = $start_date_time->format('Y-m-d\TH:i:s');
    $end_iso_8601 = $end_date_time->format('Y-m-d\TH:i:s');

    if ($start_iso_8601 === $end_iso_8601) {
      // The range is a single date and time.
      return $this->dateFormatter->format($start_timestamp, $type);
    }
    elseif (substr($start_iso_8601, 0, 10) == substr($end_iso_8601, 0, 10)) {
      // The range is contained within a single day.
      $start_text = $this->dateFormatter->format($start_timestamp, $type, '', $timezone, $langcode);
      $end_text = $this->dateFormatter->format($end_timestamp, 'custom', 'H:i', $timezone, $langcode);
      return $start_text . $separator . $end_text;
    }

    // Fallback: show the start and end datetimes in full using the default
    // pattern. This is the case if the range spans different days,
    // or if the other patterns are not specified.
    $start_text = $this->dateFormatter->format($start_timestamp, $type, '', $timezone, $langcode);
    $end_text = $this->dateFormatter->format($end_timestamp, $type, '', $timezone, $langcode);
    return $start_text . $separator . $end_text;
  }

}