function JLMS_getChatXML($course_id, $group_id, $option, $checked = false)
{
global $JLMS_DB, $my, $JLMS_CONFIG;
$do_chat = $checked;
if (!$do_chat) {
$JLMS_ACL =& JLMSFactory::getACL();
if ($JLMS_ACL->CheckPermissions('chat', 'view')) {
if ($JLMS_ACL->CheckPermissions('chat', 'manage')) {
if ($group_id) {
if ($JLMS_CONFIG->get('use_global_groups', 1)) {
$query = "SELECT group_chat FROM #__lms_usergroups WHERE course_id = 0 AND id = {$group_id}";
$JLMS_DB->SetQuery($query);
if ($JLMS_DB->LoadResult()) {
$do_chat = true;
}
} else {
$query = "SELECT group_chat FROM #__lms_usergroups WHERE course_id = {$course_id} AND id = {$group_id}";
$JLMS_DB->SetQuery($query);
if ($JLMS_DB->LoadResult()) {
$do_chat = true;
}
}
} else {
$do_chat = true;
}
} else {
if ($group_id) {
if ($JLMS_CONFIG->get('use_global_groups', 1)) {
$query = "SELECT group_chat FROM #__lms_users_in_global_groups AS uigg, #__lms_usergroups AS ug WHERE uigg.user_id = {$my->id} AND uigg.group_id = {$group_id} AND ug.id = uigg.group_id";
$JLMS_DB->setQuery($query);
if ($JLMS_DB->LoadResult()) {
$do_chat = true;
}
} else {
$query = "SELECT b.group_chat FROM #__lms_users_in_groups as a, #__lms_usergroups as b" . "\n WHERE a.course_id = {$course_id} AND a.group_id = {$group_id} AND a.user_id = '" . $my->id . "' AND a.group_id = b.id AND b.id = {$group_id} AND b.course_id = {$course_id}";
$JLMS_DB->SetQuery($query);
if ($JLMS_DB->LoadResult()) {
$do_chat = true;
}
}
} else {
$do_chat = true;
}
}
}
}
if ($do_chat) {
$last_msg = intval(mosGetParam($_REQUEST, 'last_msg', 0));
//query (Drop users)
$tim_minus_15 = time() - date('Z') - 15 * 60;
$query = "DELETE FROM #__lms_chat_users WHERE time_post < '" . date('Y-m-d H:i:s', $tim_minus_15) . "'";
$JLMS_DB->SetQuery($query);
$JLMS_DB->query();
$query = "SELECT time_enter, time_post FROM #__lms_chat_users" . "\n WHERE user_id = '" . $my->id . "' AND course_id = '" . $course_id . "' AND group_id = '" . $group_id . "'";
$JLMS_DB->SetQuery($query);
$XML_data = '';
$user_time_obj = $JLMS_DB->LoadObject();
if (is_object($user_time_obj) && isset($user_time_obj->time_enter)) {
$time_online = $user_time_obj->time_enter;
$time_prev_post = $user_time_obj->time_post;
if ($time_online) {
//query (Update time)
$query = "UPDATE #__lms_chat_users SET time_post = '" . gmdate('Y-m-d H:i:s') . "'" . "\n WHERE user_id = '" . $my->id . "' AND course_id = '" . $course_id . "' AND group_id = '" . $group_id . "'";
$JLMS_DB->SetQuery($query);
$JLMS_DB->query();
$query = "SELECT a.username FROM #__users as a, #__lms_chat_users as b" . "\n WHERE a.id = b.user_id AND b.course_id = '" . $course_id . "' AND b.group_id = '" . $group_id . "'" . "\n ORDER BY a.username";
$JLMS_DB->SetQuery($query);
$chat_users = $JLMS_DB->LoadObjectList();
$query = "SELECT a.username, b.user_message, b.mes_time, b.id FROM #__users as a, #__lms_chat_history as b" . "\n WHERE a.id = b.user_id AND b.course_id = '" . $course_id . "' AND b.mes_time > '" . $time_online . "'" . "\n AND b.group_id = '" . $group_id . "' AND (b.recv_id = '0' OR b.recv_id = '" . $my->id . "')" . "\n ORDER BY b.mes_time DESC, b.id DESC LIMIT 0, 100";
$JLMS_DB->SetQuery($query);
$chat_history = $JLMS_DB->LoadObjectList();
$new_chat_history = array();
$time_prev_post_time = strtotime($time_prev_post);
$do_scroll_chat = false;
$new_last_id = 0;
$i = count($chat_history) - 1;
if (isset($chat_history[0]->mes_time)) {
$time_last_post_time = strtotime($chat_history[0]->mes_time);
if ($time_last_post_time >= $time_prev_post_time) {
$do_scroll_chat = true;
}
}
while ($i >= 0) {
$new_chat_history[] = $chat_history[$i];
$i--;
}
/* 29.05.2008 - changes by DEN */
$show_chat_history = array();
for ($i = 0; $i < count($new_chat_history); $i++) {
if ($new_chat_history[$i]->id > $last_msg) {
$show_chat_history[] = $new_chat_history[$i];
if ($new_chat_history[$i]->id > $new_last_id) {
$new_last_id = $new_chat_history[$i]->id;
}
}
}
$count_mes = count($show_chat_history);
$XML_data .= "\t" . '<task>chat_xml</task>' . "\n";
$XML_data .= "\t" . '<count_new_msgs>' . $count_mes . '</count_new_msgs>' . "\n";
$XML_data .= "\t" . '<chat_last_id>' . $new_last_id . '</chat_last_id>' . "\n";
$XML_data .= "\t" . '<chat_users><![CDATA[' . JLMS_chat_html::prepareUserList($chat_users) . ']]></chat_users>' . "\n";
//$XML_data .= "\t" . '<chat_history><![CDATA['.JLMS_chat_html::prepareChatHistory($new_chat_history).']]></chat_history>' . "\n";
$i = 1;
foreach ($show_chat_history as $data) {
$CDATA = '<b>' . $data->username . ': </b><br />';
$CDATA .= JLMS_nl2br($data->user_message);
$XML_data .= "\t" . '<chat_message_' . $i . '><![CDATA[' . $CDATA . ']]></chat_message_' . $i . '>' . "\n";
$i++;
}
}
}
$iso = explode('=', _ISO);
echo "\n" . "some notices :)";
$debug_str = ob_get_contents();
$debug_str = "no debug info";
ob_end_clean();
header('Expires: Fri, 14 Mar 1980 20:53:00 GMT');
header('Last-Modified: ' . gmdate('D, d M Y H:i:s') . ' GMT');
header('Cache-Control: no-cache, must-revalidate');
header('Pragma: no-cache');
if (class_exists('JFactory')) {
$document =& JFactory::getDocument();
$charset_xml = $document->getCharset();
header('Content-Type: text/xml; charset=' . $charset_xml);
} else {
header('Content-Type: text/xml');
}
if ($XML_data != "") {
echo '<?xml version="1.0" encoding="' . $iso[1] . '" standalone="yes"?>';
echo '<response>' . "\n";
echo $XML_data;
echo "\t" . '<debug><![CDATA[' . $debug_str . ']]></debug>' . "\n";
echo '</response>' . "\n";
} else {
echo '<?xml version="1.0" encoding="' . $iso[1] . '" standalone="yes"?>';
echo '<response>' . "\n";
echo "\t" . '<task>failed</task>' . "\n";
echo "\t" . '<info>boom</info>' . "\n";
echo "\t" . '<debug><![CDATA[' . $debug_str . ']]></debug>' . "\n";
echo '</response>' . "\n";
}
}
exit;
}
function showChat($course_id, $group_id, $option, $lists, $chat_users)
{
global $Itemid, $JLMS_CONFIG;
$additon_js = '
var Chat_scroll_obj;
function jlms_prepare_el_Chat_scroll_obj() {
var Chat_scroll_obj = new Fx.Scroll(\'jlms_chat_window\', {
wait: false,
duration: 0,
offset: {\'x\': 0, \'y\': 0}
});
Chat_scroll_obj.toBottom();
}
';
$JLMS_CONFIG->set('jlms_aditional_js_code', $JLMS_CONFIG->get('jlms_aditional_js_code', '') . $additon_js);
$domready = '
jlms_prepare_el_Chat_scroll_obj();
';
$JLMS_CONFIG->set('web20_domready_code', $JLMS_CONFIG->get('web20_domready_code', '') . $domready);
?>
<script language="javascript" type="text/javascript">
<!--
var timer_msec = 4000;
var block_chat = 0;
var chat_last_msg = 0;
var ste_k = 2;
var tID = '';
var url_prefix = '<?php
echo "index.php?tmpl=component&option={$option}&Itemid={$Itemid}&id={$course_id}&group_id={$group_id}";
?>
';
function jlms_MakeRequest(url) {
var http_request = false;
if (window.ActiveXObject) { // IE
try { http_request = new ActiveXObject("Msxml2.XMLHTTP");
} catch (e) {
try { http_request = new ActiveXObject("Microsoft.XMLHTTP");
} catch (e) {}
}
} else if (window.XMLHttpRequest) { // Mozilla, Safari,...
http_request = new XMLHttpRequest();
if (http_request.overrideMimeType) {
http_request.overrideMimeType('text/xml');
}
}
if (!http_request) {
return false;
}
http_request.onreadystatechange = function() { if (window.jlms_AnalizeRequest) {jlms_AnalizeRequest(http_request);} };
http_request.open('POST', url_prefix, true);
http_request.setRequestHeader("Content-type", "application/x-www-form-urlencoded");
http_request.setRequestHeader("Content-length", url.length);
http_request.send(url);
}
function jlms_AnalizeRequest(http_request) {
if (http_request.readyState == 4) {
if ((http_request.status == 200)) {
block_chat = 0;
if(http_request.responseXML.documentElement == null){
try {
http_request.responseXML.loadXML(http_request.responseText)
} catch (e) {
/*alert("Can't load");*/
}
}
response = http_request.responseXML.documentElement;
var task = response.getElementsByTagName('task')[0].firstChild.data;
switch (task) {
case 'chat_xml':
//var response_chat = response.getElementsByTagName('chat_history')[0].firstChild.data;
var response_users = response.getElementsByTagName('chat_users')[0].firstChild.data;
var chat_last_id = response.getElementsByTagName('chat_last_id')[0].firstChild.data;
if (parseInt(chat_last_id)) {
chat_last_msg = parseInt(chat_last_id);
}
//var response_do_scroll = response.getElementsByTagName('do_scroll')[0].firstChild.data;
/*getObj('JLMS_chat_history').innerHTML = response_chat;
getObj('JLMS_chat_users').innerHTML = response_users;
if (response_do_scroll == 1 || response_do_scroll == '1') {
if ($defined(Chat_scroll_obj)) {
var type = typeof Chat_scroll_obj;
if (type == 'object') {
Chat_scroll_obj.toBottom();
} else {
jlms_prepare_el_Chat_scroll_obj();
}
} else {
jlms_prepare_el_Chat_scroll_obj();
}
}*/
var count_new_mess = response.getElementsByTagName('count_new_msgs')[0].firstChild.data;
if(parseInt(count_new_mess)){
count_new_mess = parseInt(count_new_mess);
var el_history = getObj('jlms_chathistory');
for(var j=1;j < (count_new_mess + 1);j++){
var message = response.getElementsByTagName('chat_message_'+j)[0].firstChild.data;
var tbody = new Array();
tbody = el_history.childNodes;
for(var i=0;i < tbody.length;i++){
if(tbody[i].tagName == "TBODY"){
var el_tbody = tbody[i];
}
}
var tr_111 = document.createElement("tr");
var td_111 = document.createElement("td");
td_111.innerHTML = message;
tr_111.appendChild(td_111);
tr_111.className = 'sectiontableentry'+ste_k;
ste_k = 3 - ste_k;
el_tbody.appendChild(tr_111);
}
/*var scroll_y = parseInt(el_history.offsetHeight);
document.getElementById("jlms_chat_window").scrollTop = scroll_y;*/
if ($defined(Chat_scroll_obj)) {
var type = typeof Chat_scroll_obj;
if (type == 'object') {
Chat_scroll_obj.toBottom();
} else {
jlms_prepare_el_Chat_scroll_obj();
}
} else {
jlms_prepare_el_Chat_scroll_obj();
}
}
clearTimeout(tID);
tID = setTimeout("jlms_RequestChatHistory()", timer_msec);
break;
}
} else {
}
}
}
function ctrlenter(e){
$('chat_new_mes').onkeypress = function(event){
var event = new Event(event);
if ( ((window.opera || window.gecko) && event.code == '13' && event.control) || ((window.ie || window.webkit) && event.code == '10' && event.control) ){
jlms_chatPostMessage();
}
}
}
function jlms_RequestChatHistory() {
jlms_MakeRequest('task=get_chat_xml&last_msg='+chat_last_msg);
}
function TRIM_str(sStr) {
return (sStr.replace(/^[\s\xA0]+/, "").replace(/[\s\xA0]+$/, ""));
}
function URLencode(sStr) {
return escape(sStr).replace(/\+/g, '%2B').replace(/\"/g,'%22').replace(/\'/g, '%27').replace(/\//g,'%2F');
}
function jlms_chatPostMessage() {
if (block_chat != 1) {
clearTimeout(tID);
var form = document.chatMesForm;
var user_message = form.chat_new_mes.value;
if (user_message != '') {
form.chat_new_mes.value = '';
if (TRIM_str(user_message) != '')
{
block_chat = 1;
jlms_MakeRequest('task=chat_post&last_msg='+chat_last_msg+'&message='+URLencode(TRIM_str(user_message)));
}
}
}
}
//-->
</script>
<?php
JLMS_TMPL::OpenMT();
$hparams = array();
JLMS_TMPL::ShowHeader('chat', _JLMS_CHAT_TITLE, $hparams);
JLMS_TMPL::OpenTS();
?>
<noscript>
<div class="joomlalms_sys_message">
<?php
echo _JLMS_JS_COOKIES_REQUIRES;
?>
</div>
</noscript>
<table cellpadding="0" cellspacing="0" border="0" width="100%" class="jlms_table_no_borders">
<tr>
<td colspan="2" align="right" style="text-align:right ">
<form action="<?php
echo sefRelToAbs("index.php?option={$option}&Itemid={$Itemid}");
?>
" method="post" name="chatForm">
<?php
echo $lists['course_chats'];
?>
<input type="hidden" name="option" value="<?php
echo $option;
?>
" />
<input type="hidden" name="Itemid" value="<?php
echo $Itemid;
?>
" />
<input type="hidden" name="task" value="chat" />
<input type="hidden" name="id" value="<?php
echo $course_id;
?>
" />
</form>
</td>
</tr>
</table>
<div style="width:100%; height:400px; overflow:auto; overflow-x:hidden;" id="jlms_chat_window">
<table cellpadding="0" cellspacing="1" border="0" width="100%" class="<?php
echo JLMSCSS::_('jlmslist');
?>
">
<tr>
<<?php
echo JLMSCSS::tableheadertag();
?>
class="<?php
echo JLMSCSS::_('sectiontableheader');
?>
" width="70%"><?php
echo _JLMS_CHAT_TBL_HEAD_CHAT;
?>
</<?php
echo JLMSCSS::tableheadertag();
?>
>
<<?php
echo JLMSCSS::tableheadertag();
?>
class="<?php
echo JLMSCSS::_('sectiontableheader');
?>
" width="30%"><?php
echo _JLMS_CHAT_TBL_HEAD_USERS;
?>
</<?php
echo JLMSCSS::tableheadertag();
?>
>
</tr>
<tr>
<td id="JLMS_chat_history" valign="top" align="left" style="text-align:left;padding:0px;margin:0px;" width="70%">
<table width="100%" cellpadding="0" cellspacing="0" border="0" id="jlms_chathistory" class="<?php
echo JLMSCSS::_('jlmslist');
?>
" style="margin:0px; padding:0px;">
<tr class="<?php
echo JLMSCSS::_('sectiontableentry1');
?>
"><td align="left"><?php
echo _JLMS_CHAT_WELCOME_MESSAGE;
?>
</td></tr>
</table>
</td>
<td id="JLMS_chat_users" valign="top" align="left" style="text-align:left;padding:0px;margin:0px;" width="30%">
<?php
echo JLMS_chat_html::prepareUserList($chat_users);
?>
</td>
</tr>
</table>
</div>
<table cellpadding="0" cellspacing="0" border="0" width="100%" class="jlms_table_no_borders">
<tr>
<td>
<form action="<?php
echo sefRelToAbs("index.php?option={$option}&Itemid={$Itemid}");
?>
" onsubmit="jlms_chatPostMessage();return false;" method="get" name="chatMesForm">
<table cellpadding="0" cellspacing="0" border="0" width="100%" class="jlms_table_no_borders">
<tr>
<td align="left" width="90%">
<textarea id="chat_new_mes" name="chat_new_mes" class="inputbox" cols="65" rows="3" style="width:99%; overflow-y:auto; border: 1px solid rgb(198, 198, 198);" onkeypress="ctrlenter(this);"></textarea>
</td>
<td align="left" style="padding-left:20px; width:64px;">
<img class="JLMS_png" src="<?php
echo $JLMS_CONFIG->get('live_site');
?>
/components/<?php
echo $option;
?>
/lms_images/send_post_chat.png" border="0" alt="<?php
echo _JLMS_CHAT_BTN_POST;
?>
" title="<?php
echo _JLMS_CHAT_BTN_POST;
?>
" onclick="jlms_chatPostMessage();" style="cursor:pointer;"/>
</td>
</tr>
</table>
</form>
</td>
</tr>
</table>
<script language="javascript" type="text/javascript">
<!--
tID = setTimeout("jlms_RequestChatHistory()", timer_msec);
//-->
</script>
<?php
JLMS_TMPL::CloseTS();
JLMS_TMPL::CloseMT();
}