File Source for chat

<?php // $Id: chat_chat.php,v 1.10 2005/05/18 13:58:10 bvanderkimpen Exp $
/*
==============================================================================
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.chat
==============================================================================
*/
define('FRAME','chat');
$language_file = array ('chat');
require('../inc/global.inc.php');
include(api_get_path(LIBRARY_PATH).'document.lib.php');
include (api_get_path(LIBRARY_PATH).'fileUpload.lib.php');
$course=api_get_course_id();
// if we have the session set up
if (!empty($course))
{
$reset=$_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;
$dateNow=date('Y-m-d');
$documentPath=api_get_path(SYS_COURSE_PATH).$_course['path'].'/document/';
$chatPath=$documentPath.'chat_files/';
$TABLEITEMPROPERTY= Database::get_course_table(TABLE_ITEM_PROPERTY);
if(!is_dir($chatPath))
{
if(is_file($chatPath))
{
@unlink($chatPath);
}
$perm = api_get_setting('permissions_for_new_directories');
$perm = octdec(!empty($perm)?$perm:'0770');
@mkdir($chatPath,$perm);
@chmod($chatPath,$perm);
$doc_id=add_document($_course,'/chat_files','folder',0,'chat_files');
api_sql_query("INSERT INTO ".$TABLEITEMPROPERTY . " (tool,insert_user_id,insert_date,lastedit_date,ref,lastedit_type,lastedit_user_id,to_group_id,to_user_id,visibility) VALUES ('document',1,NOW(),NOW(),$doc_id,'DocumentAdded',1,0,NULL,0)");
}
if(!file_exists($chatPath.'messages-'.$dateNow.'.log.html'))
{
@fclose(fopen($chatPath.'messages-'.$dateNow.'.log.html','w'));
$doc_id=add_document($_course,'/chat_files/messages-'.$dateNow.'.log.html','file',0,'messages-'.$dateNow.'.log.html');
api_item_property_update($_course, TOOL_DOCUMENT, $doc_id, 'DocumentAdded', $_user['user_id']);
item_property_update_on_folder($_course,'/chat_files', $_user['user_id']);
}
if($reset && $isMaster)
{
$i=1;
while(file_exists($chatPath.'messages-'.$dateNow.'-'.$i.'.log.html'))
{
$i++;
}
@rename($chatPath.'messages-'.$dateNow.'.log.html',$chatPath.'messages-'.$dateNow.'-'.$i.'.log.html');
@fclose(fopen($chatPath.'messages-'.$dateNow.'.log.html','w'));
$doc_id=add_document($_course,'/chat_files/messages-'.$dateNow.'-'.$i.'.log.html','file',filesize($chatPath.'messages-'.$dateNow.'-'.$i.'.log.html'),'messages-'.$dateNow.'-'.$i.'.log.html');
api_item_property_update($_course, TOOL_DOCUMENT, $doc_id, 'DocumentAdded', $_user['user_id']);
item_property_update_on_folder($_course,'/chat_files', $_user['user_id']);
$doc_id = DocumentManager::get_document_id($_course,'/chat_files/messages-'.$dateNow.'.log.html');
update_existing_document($_course, $doc_id,0);
}
$content=file($chatPath.'messages-'.$dateNow.'.log.html');
$nbr_lines=sizeof($content);
$remove=$nbr_lines-100;
if($remove < 0)
{
$remove=0;
}
array_splice($content,0,$remove);
include('header_frame.inc.php');
if ($_GET["origin"]=='whoisonline') { //the caller
$content[0]=get_lang('CallSent').'<br>'.$content[0];
}
if ($_GET["origin"]=='whoisonlinejoin') { //the joiner (we have to delete the chat request to him when he joins the chat)
$track_user_table = Database::get_main_table(TABLE_MAIN_USER);
$sql="update $track_user_table set chatcall_user_id = '', chatcall_date = '', chatcall_text='' where (user_id = ".$_user['user_id'].")";
$result=api_sql_query($sql,__FILE__,__LINE__);
}
echo '<div style="margin-left: 5px;">';
foreach($content as $thisLine)
{
echo strip_tags(html_entity_decode($thisLine),'<br> <span> <b>');
}
echo '</div>';
?>
<a name="bottom" style="text-decoration:none;"> </a>
<?php
if($isMaster || $is_courseCoach)
{
$rand=mt_rand(1,1000);
echo '<div style="margin-left: 5px;">';
echo '<a href="'.api_get_self().'?rand='.$rand.'&reset=1#bottom" onclick="javascript:if(!confirm(\''.addslashes(htmlentities(get_lang('ConfirmReset'),ENT_QUOTES,$charset)).'\')) return false;"><img src="../img/delete.gif" border="0" alt="" align="absbottom">'.get_lang('ClearList').'</a>';
echo '</div>';
}
}
else
{ include('header_frame.inc.php');
$message=get_lang('CloseOtherSession');
Display :: display_error_message($message);
}
include('footer_frame.inc.php');
?>

Source for file chat_chat.php