File Source for online

<?php
/*
==============================================================================
Dokeos - elearning and course management software
Copyright (c) 2004 Dokeos S.A.
Copyright (c) 2003 Ghent University (UGent)
Copyright (c) 2001 Universite catholique de Louvain (UCL)
Copyright (c) Olivier Brouckaert
For a full list of contributors, see "credits.txt".
The full license can be read in "license.txt".
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
See the GNU General Public License for more details.
Contact: Dokeos, 181 rue Royale, B-1000 Brussels, Belgium, info@dokeos.com
==============================================================================
*/
/**
==============================================================================
* Chat frame that shows the message list
*
* @author Olivier Brouckaert
* @package dokeos.online
==============================================================================
*/
define('FRAME','chat');
// name of the language file that needs to be included
$language_file='chat';
include('../inc/global.inc.php');
$reset=$_GET['reset']?true:false;
$tbl_user = Database::get_main_table(TABLE_MAIN_USER);
$query="SELECT username FROM $tbl_user WHERE user_id='".$_user['user_id']."'";
$result=api_sql_query($query,__FILE__,__LINE__);
list($pseudoUser)=mysql_fetch_row($result);
$isAllowed=(empty($pseudoUser) || !$_cid)?false:true;
$isMaster=$is_courseAdmin?true:false;
if(!$isAllowed)
{
exit();
}
$dateNow=date('Y-m-d');
$documentPath=api_get_path(SYS_COURSE_PATH).$_course['path'].'/document/';
$onlinePath=$documentPath.'online_files/';
if(!file_exists($onlinePath.'messages-'.$dateNow.'.log'))
{
fclose(fopen($onlinePath.'messages-'.$dateNow.'.log','w'));
}
if($reset && $isMaster)
{
$i=1;
while(file_exists($onlinePath.'messages-'.$dateNow.'-'.$i.'.log'))
{
$i++;
}
rename($onlinePath.'messages-'.$dateNow.'.log',$onlinePath.'messages-'.$dateNow.'-'.$i.'.log');
fclose(fopen($onlinePath.'messages-'.$dateNow.'.log','w'));
}
$content=file($onlinePath.'messages-'.$dateNow.'.log');
$nbr_lines=sizeof($content);
$remove=$nbr_lines-100;
if($remove < 0)
{
$remove=0;
}
array_splice($content,0,$remove);
include('header_frame.inc.php');
foreach($content as $thisLine)
{
echo "$thisLine<br>";
}
?>
<a name="bottom" style="text-decoration:none;"> </a>
<?php
if($isMaster)
{
$rand=mt_rand(1,1000);
?>
<br>
<table border="0" cellpadding="0" cellspacing="0" width="100%">
<tr>
<td width="1%" valign="middle"><a href="<?php echo api_get_self(); ?>?rand=<?php echo $rand; ?>&reset=1#bottom" onclick="javascript:if(!confirm('<?php echo addslashes(htmlentities(get_lang('ConfirmReset'),ENT_QUOTES,$charset)); ?>')) return false;"><img src="../img/delete.gif" border="0" alt="" title="<?php echo htmlentities(get_lang('ClearList'),ENT_QUOTES,$charset); ?>"></a></td>
<td width="99%"> <a href="<?php echo api_get_self(); ?>?rand=<?php echo $rand; ?>&reset=1#bottom" onclick="javascript:if(!confirm('<?php echo addslashes(htmlentities(get_lang('ConfirmReset'),ENT_QUOTES,$charset)); ?>')) return false;"><?php echo get_lang('ClearList'); ?></a></td>
</tr>
</table>
<?php
}
include('footer_frame.inc.php');
?>

Source for file online_chat.php