Rest::watchExtend

static function watchExtend($params, $n, CRestServer $server)
{
	$params = array_change_key_case($params, CASE_UPPER);

	if(is_string($params['TAGS']))
	{
		$params['TAGS'] = CUtil::JsObjectToPhp($params['TAGS']);
	}

	global $USER;
	$userId = $USER->GetID();

	return CPullWatch::Extend($userId, array_values($params['TAGS']));
}