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<?
/**
* Bitrix Framework
* @package bitrix
* @subpackage tasks
* @copyright 2001-2016 Bitrix
*/
namespace Bitrix\Tasks\Item;
use Bitrix\Tasks\Util\Type\DateTime;
use Bitrix\Tasks\Util\User;
final class Context
{
protected $userId = null;
protected $now = null;
protected $immutable = false;
protected static $defaultContexts = array();
/**
* Who
*
* @return int
*/
public function getUserId()
{
if(intval($this->userId))
{
return intval($this->userId);
}
return User::getId();
}
/**
* On which site
*
* @return DateTime|null
*/
public function getSiteId()
{
return SITE_ID;
}
/**
* At which time
*
* @return DateTime|null
*/
public function getNow()
{
if($this->now !== null)
{
return $this->now;
}
return new DateTime();
}
public function setUserId($userId)
{
$this->userId = intval($userId);
}
public function setNow(DateTime $now)
{
if($this->isImmutable())
{
return; // todo: throw NotAllowedException?
}
// todo: it is better to make $now immutable...
$this->now = $now;
}
/**
* Normally you SHOULD NOT be able to modify default context, so immutable flag is at our rescue
*/
public function setImmutable()
{
$this->immutable = true;
}
public function isImmutable()
{
return $this->immutable;
}
/**
* @return Context
*/
public function spawn()
{
return new static();
}
/**
* @return static mixed
*/
public static function getDefault()
{
$class = static::getClass();
if(!static::$defaultContexts[$class])
{
// default context should be immutable, or else we will face disaster!
$ctx = new static();
$ctx->setImmutable();
static::$defaultContexts[$class] = $ctx;
}
return static::$defaultContexts[$class];
}
public static function getClass()
{
return get_called_class();
}
public static function isA($object)
{
return is_a($object, static::getClass());
}
}