helper.php

<?php
 
namespace Bitrix\Calendar\Sync\Util;
 
use Bitrix\Main\Application;
 
class Helper
{
    public static function getDomain(): string
    {
        if (\CCalendar::isBitrix24())
        {
            return 'https://bitrix24.com';
        }
 
        if (defined('BX24_HOST_NAME') && BX24_HOST_NAME)
        {
            return "https://" . BX24_HOST_NAME;
        }
 
        $server = Application::getInstance()->getContext()->getServer();
 
        return "https://" . $server['HTTP_HOST'];
    }
}