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<?php
namespace Bitrix\Im;

class Common
{
   public static function getPublicDomain()
   {
      $schema = \Bitrix\Main\Context::getCurrent()->getRequest()->isHttps()? "https" : "http";

      if (defined("SITE_SERVER_NAME") && strlen(SITE_SERVER_NAME) > 0)
      {
         $domain = SITE_SERVER_NAME;
      }
      else
      {
         $domain = \Bitrix\Main\Config\Option::get("main", "server_name", '');
         if (!$domain)
         {
            $domain = $_SERVER['SERVER_NAME'].(in_array($_SERVER['SERVER_PORT'], Array(80, 443))?'':':'.$_SERVER['SERVER_PORT']);
         }
      }

      return $schema."://".$domain;
   }