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<?php
/**
* Bitrix Framework
* @package bitrix
* @subpackage main
* @copyright 2001-2013 Bitrix
*/
IncludeModuleLangFile(__FILE__);
class CTimeZone
{
protected static $enabled = 1;
protected static $useTimeZones = false;
public static function Possible()
{
return class_exists('DateTime');
}
public static function Enabled()
{
if(self::$enabled > 0 && self::Possible())
{
if(self::$useTimeZones === false)
self::$useTimeZones = COption::GetOptionString("main", "use_time_zones", "N");
if(self::$useTimeZones == "Y")
return true;
}
return false;
}
public static function Disable()
{
self::$enabled --;
}
public static function Enable()
{
self::$enabled ++;
}
private static function __tzsort($a, $b)
{
if($a['offset'] == $b['offset'])
return strcmp($a['timezone_id'], $b['timezone_id']);
return ($a['offset'] < $b['offset']? -1 : 1);
}
public static function GetZones()
{
$aTZ = array();
static $aExcept = array("Etc/", "GMT", "UTC", "UCT", "HST", "PST", "MST", "CST", "EST", "CET", "MET", "WET", "EET", "PRC", "ROC", "ROK", "W-SU");
foreach(DateTimeZone::listIdentifiers() as $tz)
{
foreach($aExcept as $ex)
if(strpos($tz, $ex) === 0)
continue 2;
try
{
$oTz = new DateTimeZone($tz);
$aTZ[$tz] = array('timezone_id'=>$tz, 'offset'=>$oTz->getOffset(new DateTime("now", $oTz)));
}
catch(Exception $e){}
}
uasort($aTZ, array('CTimeZone', '__tzsort'));
$aZones = array(""=>GetMessage("tz_local_time"));
foreach($aTZ as $z)
$aZones[$z['timezone_id']] = '(UTC'.($z['offset'] <> 0? ' '.($z['offset'] < 0? '-':'+').sprintf("%02d", ($h = floor(abs($z['offset'])/3600))).':'.sprintf("%02d", abs($z['offset'])/60 - $h*60) : '').') '.$z['timezone_id'];
return $aZones;
}
public static function SetAutoCookie()
{
/** @global CMain $APPLICATION */
global $APPLICATION, $USER;
$cookie_prefix = COption::GetOptionString('main', 'cookie_name', 'BITRIX_SM');
if(self::IsAutoTimeZone(trim($USER->GetParam("AUTO_TIME_ZONE"))))
{
$APPLICATION->AddHeadString(
'<script type="text/javascript">var bxDate = new Date(); document.cookie="'.$cookie_prefix.'_TIME_ZONE="+bxDate.getTimezoneOffset()+"%2C"+Math.round(bxDate.getTime()/1000)+"%2C'.time().'; path=/; expires=Fri, 01-Jan-2038 00:00:00 GMT"</script>', true
);
}
elseif(isset($_COOKIE[$cookie_prefix."_TIME_ZONE"]))
{
unset($_COOKIE[$cookie_prefix."_TIME_ZONE"]);
setcookie($cookie_prefix."_TIME_ZONE", "", time()-3600, "/");
}
}
public static function IsAutoTimeZone($autoTimeZone)
{
if($autoTimeZone == "Y")
{
return true;
}
if($autoTimeZone == '')
{
static $defAutoZone = null;
if($defAutoZone === null)
{
$defAutoZone = (COption::GetOptionString("main", "auto_time_zone", "N") == "Y");
}
return $defAutoZone;
}
return false;
}
public static function GetCookieValue()
{
static $cookie_prefix = null;
if($cookie_prefix === null)
{
$cookie_prefix = COption::GetOptionString('main', 'cookie_name', 'BITRIX_SM');
}
if(isset($_COOKIE[$cookie_prefix."_TIME_ZONE"]) && $_COOKIE[$cookie_prefix."_TIME_ZONE"] <> '')
{
$arCookie = explode(",", $_COOKIE[$cookie_prefix."_TIME_ZONE"]);
if(count($arCookie) == 3)
{
return $arCookie;
}
}
return null;
}
public static function GetOffset($USER_ID = null)
{
global $USER;
if(!self::Enabled())
return 0;
try //possible DateTimeZone incorrect timezone
{
$localTime = new DateTime();
$localOffset = $localTime->getOffset();
$userOffset = $localOffset;
$autoTimeZone = $userZone = '';
$factOffset = 0;
if($USER_ID !== null)
{
$dbUser = CUser::GetByID($USER_ID);
if(($arUser = $dbUser->Fetch()))
{
$autoTimeZone = trim($arUser["AUTO_TIME_ZONE"]);
$userZone = $arUser["TIME_ZONE"];
$factOffset = $arUser["TIME_ZONE_OFFSET"];
}
}
elseif(is_object($USER))
{
$autoTimeZone = trim($USER->GetParam("AUTO_TIME_ZONE"));
$userZone = $USER->GetParam("TIME_ZONE");
}
if($autoTimeZone == "N")
{
//manually set time zone
$userTime = ($userZone <> ""? new DateTime(null, new DateTimeZone($userZone)) : $localTime);
$userOffset = $userTime->getOffset();
}
else
{
if(self::IsAutoTimeZone($autoTimeZone))
{
if($USER_ID !== null)
{
//auto time zone from DB
return $factOffset;
}
if(($arCookie = self::GetCookieValue()) !== null)
{
//auto time zone from cookie
if($arCookie[1] >= $arCookie[2] && $arCookie[1] <= ($arCookie[2]+30*60) || $arCookie[1] <= $arCookie[2] && $arCookie[1] >= ($arCookie[2]-30*60))
{
//correct tz - offset from JS "as is"
$userOffset = -($arCookie[0])*60;
}
elseif($arCookie[1] > ($arCookie[2]+30*60))
{
//incorrect tz - try to determine offset
$diff = ($arCookie[1] - $arCookie[2]) % 3600;
return ($arCookie[1] + ($diff < 1800? -$diff : 3600-$diff)) - $arCookie[2];
}
elseif($arCookie[1] < ($arCookie[2]-30*60))
{
//incorrect tz - try to determine offset
$diff = ($arCookie[2] - $arCookie[1]) % 3600;
return ($arCookie[1] - ($diff < 1800? -$diff : 3600-$diff)) - $arCookie[2];
}
}
}
else
{
//default server time zone
$serverZone = COption::GetOptionString("main", "default_time_zone", "");
$serverTime = ($serverZone <> ""? new DateTime(null, new DateTimeZone($serverZone)) : $localTime);
$userOffset = $serverTime->getOffset();
}
}
}
catch(Exception $e)
{
return 0;
}
return $userOffset - $localOffset;
}
}