sessioncheck.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

// jump to setup if ILIAS is not installed
if(!file_exists(getcwd().'/ilias.ini.php'))
{
    header('Location: ./setup/setup.php');
        exit();
}

require_once 'Services/Init/classes/class.ilInitialisation.php';
$ilInit = new ilInitialisation();
$ilInit->returnBeforeAuth(true);
$ilInit->initILIAS();
$ilInit->initLanguage();

include_once 'Services/JSON/classes/class.ilJsonUtil.php';

global $ilDB;

$ilDB->setLimit(1);
$res = $ilDB->queryF('
        SELECT data, last_remind_ts FROM usr_session 
        WHERE session_id = %s ORDER BY expires DESC',
    array('text'),
    array($_GET['session_id']));
$oRow = $ilDB->fetchObject($res);

$response_data = array('remind' => false);
$currentTime = time();

if(is_object($oRow))
{                           
        $data = $oRow->data;
                
        $expiresTime = null;
        $pattern = "idle\";i:";
        if(($lft_pos = strpos($data, $pattern)) !== false)
        {
                $substr = substr($data, $lft_pos + strlen($pattern));
                $pattern = ";";
                if(($rgt_pos = strpos($substr, $pattern)) !== false)
                {
                        $expiresTime = (int)substr($substr, 0, $rgt_pos);
                }
        }
        
        if($expiresTime === null)
        {
                echo ilJsonUtil::encode($response_data);
                exit();
        }
        else
        {                       
                $leadTime = $_GET['lead_time'];                 
                $expiresTime += $ilClientIniFile->readVariable('session', 'expire');

                if($expiresTime >= $currentTime &&
                   $oRow->last_remind_ts <= $currentTime - $_GET['countDownTime'])
                {
                        include_once 'Services/Calendar/classes/class.ilDate.php';
                        $date = new ilDateTime(time(),IL_CAL_UNIX);
                        $currentTimeTxt = $date->get(IL_CAL_FKT_DATE,'H:i:s', urldecode($_GET['timezone']));
                        
                        $ilDB->manipulateF('
                                UPDATE usr_session SET last_remind_ts = %s WHERE session_id = %s',
                            array('integer', 'text'),
                            array($currentTime, $_GET['session_id'])); 
                        
                        $response_data = array(
                                'remind' => true,
                                'expiresInTimeX' => ilFormat::_secondsToString($leadTime, true),
                                'currentTime' => $currentTimeTxt,
                        );      
                }
                
        }       
}

echo ilJsonUtil::encode($response_data);
exit();
?>