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moodle/mod/chat/lib.php
moodler 84a2fdd706 Preliminary support for groups in Chat. 
It's not well tested yet - I'm hoping to do some testing on moodle.org
with some real people and get this refined enough for the Beta release
later today.
2004-02-24 06:35:57 +00:00

585 lines
25 KiB
PHP
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<?PHP // $Id$
/// Library of functions and constants for module chat
if (!isset($CFG->chat_refresh_room)) {
set_config("chat_refresh_room", 5);
}
if (!isset($CFG->chat_refresh_userlist)) {
set_config("chat_refresh_userlist", 10);
}
if (!isset($CFG->chat_old_ping)) {
set_config("chat_old_ping", 30);
}
define("CHAT_DRAWBOARD", false); // Look into this later
// The HTML head for the message window to start with (<!-- nix --> is used to get some browsers starting with output
$CHAT_HTMLHEAD = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\"><html><head></head>\n<body bgcolor=\"#FFFFFF\">\n\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n";
// The HTML head for the message window to start with (with js scrolling)
$CHAT_HTMLHEAD_JS = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\"><html><head><script language=\"JavaScript\">\n<!--\nfunction move()\n{\nif (scroll_active) window.scroll(1,400000);\nwindow.setTimeout(\"move()\",100);\n}\nscroll_active = true;\nmove();\n//-->\n</script>\n</head>\n<body bgcolor=\"#FFFFFF\" onBlur=\"scroll_active = true\" onFocus=\"scroll_active = false\">\n\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n<!-- nix -->\n";
// The HTML code for standard empty pages (e.g. if a user was kicked out)
$CHAT_HTMLHEAD_OUT = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\"><html><head><title>You are out!</title></head><body bgcolor=\"$THEME->body\"></body></html>";
// The HTML head for the message input page
$CHAT_HTMLHEAD_MSGINPUT = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\"><html><head><title>Message Input</title></head><body bgcolor=\"$THEME->body\">";
// The HTML code for the message input page, with JavaScript
$CHAT_HTMLHEAD_MSGINPUT_JS = "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.0 Transitional//EN\" \"http://www.w3.org/TR/REC-html40/loose.dtd\"><html><head><title>Message Input</title>\n<script language=\"Javascript\">\n<!--\nscroll_active = true;\nfunction empty_field_and_submit()\n{\ndocument.fdummy.arsc_message.value=document.f.arsc_message.value;\ndocument.fdummy.submit();\ndocument.f.arsc_message.focus();\ndocument.f.arsc_message.select();\nreturn false;\n}\n// -->\n</script>\n</head><body bgcolor=\"$THEME->body\" OnLoad=\"document.f.arsc_message.focus();document.f.arsc_message.select();\">";
function chat_add_instance($chat) {
/// Given an object containing all the necessary data,
/// (defined by the form in mod.html) this function
/// will create a new instance and return the id number
/// of the new instance.
$chat->timemodified = time();
$chat->chattime = make_timestamp($chat->chatyear, $chat->chatmonth, $chat->chatday,
$chat->chathour, $chat->chatminute);
return insert_record("chat", $chat);
}
function chat_update_instance($chat) {
/// Given an object containing all the necessary data,
/// (defined by the form in mod.html) this function
/// will update an existing instance with new data.
$chat->timemodified = time();
$chat->id = $chat->instance;
$chat->chattime = make_timestamp($chat->chatyear, $chat->chatmonth, $chat->chatday,
$chat->chathour, $chat->chatminute);
return update_record("chat", $chat);
}
function chat_delete_instance($id) {
/// Given an ID of an instance of this module,
/// this function will permanently delete the instance
/// and any data that depends on it.
if (! $chat = get_record("chat", "id", "$id")) {
return false;
}
$result = true;
# Delete any dependent records here #
if (! delete_records("chat", "id", "$chat->id")) {
$result = false;
}
return $result;
}
function chat_user_outline($course, $user, $mod, $chat) {
/// Return a small object with summary information about what a
/// user has done with a given particular instance of this module
/// Used for user activity reports.
/// $return->time = the time they did it
/// $return->info = a short text description
return $return;
}
function chat_user_complete($course, $user, $mod, $chat) {
/// Print a detailed representation of what a user has done with
/// a given particular instance of this module, for user activity reports.
return true;
}
function chat_print_recent_activity($course, $isteacher, $timestart) {
/// Given a course and a date, prints a summary of all chat rooms
/// that currently have people in them.
/// This function is called from course/lib.php: print_recent_activity()
global $CFG;
$timeold = time() - $CFG->chat_old_ping;
if (!$chatusers = get_records_sql("SELECT u.id, cu.chatid, u.firstname, u.lastname
FROM {$CFG->prefix}chat_users as cu,
{$CFG->prefix}chat as ch,
{$CFG->prefix}user as u
WHERE cu.userid = u.id
AND cu.chatid = ch.id
AND cu.lastping > '$timeold'
AND ch.course = '$course->id'
ORDER BY cu.chatid ASC") ) {
return false;
}
print_headline(get_string("currentchats", "chat").":");
$current = 0;
foreach ($chatusers as $chatuser) {
if ($current != $chatuser->chatid) {
if ($current) {
echo "</p>";
}
if ($chat = get_record("chat", "id", $chatuser->chatid)) {
echo "<p><font size=1><a href=\"$CFG->wwwroot/mod/chat/view.php?c=$chat->id\">$chat->name</a></font><br />";
}
$current = $chatuser->chatid;
}
$fullname = fullname($chatuser);
echo "&nbsp;&nbsp;&nbsp;<font size=1>- $fullname</font><br />";
}
echo "<br />";
return true;
}
function chat_cron () {
/// Function to be run periodically according to the moodle cron
/// This function searches for things that need to be done, such
/// as sending out mail, toggling flags etc ...
global $CFG;
chat_update_chat_times();
chat_delete_old_users();
/// Delete old messages
if ($chats = get_records("chat")) {
foreach ($chats as $chat) {
if ($chat->keepdays) {
$timeold = time() - ($chat->keepdays * 24 * 3600);
delete_records_select("chat_messages", "chatid = '$chat->id' AND timestamp < '$timeold'");
}
}
}
return true;
}
function chat_get_participants($chatid, $groupid=0) {
//Returns the users with data in one chat
//(users with records in chat_messages, students)
global $CFG;
if ($groupid) {
$groupselect = " AND (c.groupid='$groupid' OR c.groupid='0')";
} else {
$groupselect = "";
}
//Get students
$students = get_records_sql("SELECT DISTINCT u.*
FROM {$CFG->prefix}user u,
{$CFG->prefix}chat_messages c
WHERE c.chatid = '$chatid' $groupselect
AND u.id = c.userid");
//Return students array (it contains an array of unique users)
return ($students);
}
//////////////////////////////////////////////////////////////////////
/// Functions that require some SQL
function chat_get_users($chatid, $groupid=0) {
global $CFG;
if ($groupid) {
$groupselect = " AND (c.groupid='$groupid' OR c.groupid='0')";
} else {
$groupselect = "";
}
return get_records_sql("SELECT u.id, u.firstname, u.lastname, u.picture, c.lastmessageping
FROM {$CFG->prefix}chat_users c,
{$CFG->prefix}user u
WHERE c.chatid = '$chatid'
AND u.id = c.userid $groupselect
GROUP BY u.id
ORDER BY c.firstping ASC");
}
function chat_get_latest_message($chatid, $groupid=0) {
/// Efficient way to extract just the latest message
/// Uses ADOdb directly instead of get_record_sql()
/// because the LIMIT command causes problems with
/// the developer debugging in there.
global $db, $CFG;
if ($groupid) {
$groupselect = " AND (groupid='$groupid' OR groupid='0')";
} else {
$groupselect = "";
}
if (!$rs = $db->Execute("SELECT *
FROM {$CFG->prefix}chat_messages
WHERE chatid = '$chatid' $groupselect
ORDER BY timestamp DESC LIMIT 1")) {
return false;
}
if ($rs->RecordCount() == 1) {
return (object)$rs->fields;
} else {
return false; // Found no records
}
}
//////////////////////////////////////////////////////////////////////
function chat_login_user($chatid, $version="header_js") {
global $USER;
$chatuser->chatid = $chatid;
$chatuser->userid = $USER->id;
$chatuser->version = $version;
$chatuser->ip = $USER->lastIP;
$chatuser->lastping = $chatuser->firstping = $chatuser->lastmessageping = time();
$chatuser->sid = random_string(32);
if (!insert_record("chat_users", $chatuser)) {
return false;
}
return $chatuser->sid;
}
function chat_delete_old_users() {
// Delete the old and in the way
global $CFG;
$timeold = time() - $CFG->chat_old_ping;
if ($oldusers = get_records_select("chat_users", "lastping < '$timeold'") ) {
delete_records_select("chat_users", "lastping < '$timeold'");
foreach ($oldusers as $olduser) {
$message->chatid = $olduser->chatid;
$message->userid = $olduser->userid;
$message->groupid = $olduser->groupid;
$message->message = "exit";
$message->system = 1;
$message->timestamp = time();
if (!insert_record("chat_messages", $message)) {
error("Could not insert a chat message!");
}
}
}
}
function chat_update_chat_times($chatid=0) {
/// Updates chat records so that the next chat time is correct
$timenow = time();
if ($chatid) {
if (!$chats[] = get_record_select("chat", "id = '$chatid' AND chattime <= '$timenow' AND schedule > '0'")) {
return;
}
} else {
if (!$chats = get_records_select("chat", "chattime <= '$timenow' AND schedule > '0'")) {
return;
}
}
foreach ($chats as $chat) {
switch ($chat->schedule) {
case 1: // Single event - turn off schedule and disable
$chat->chattime = 0;
$chat->schedule = 0;
break;
case 2: // Repeat daily
$chat->chattime += 24 * 3600;
break;
case 3: // Repeat weekly
$chat->chattime += 7 * 24 * 3600;
break;
}
update_record("chat", $chat);
}
}
function chat_browser_detect($HTTP_USER_AGENT) {
if(eregi("(opera) ([0-9]{1,2}.[0-9]{1,3}){0,1}", $HTTP_USER_AGENT, $match)
|| eregi("(opera/)([0-9]{1,2}.[0-9]{1,3}){0,1}", $HTTP_USER_AGENT, $match))
{
$BName = "Opera"; $BVersion=$match[2];
}
elseif( eregi("(konqueror)/([0-9]{1,2}.[0-9]{1,3})", $HTTP_USER_AGENT, $match) )
{
$BName = "Konqueror"; $BVersion=$match[2];
}
elseif( eregi("(lynx)/([0-9]{1,2}.[0-9]{1,2}.[0-9]{1,2})", $HTTP_USER_AGENT, $match) )
{
$BName = "Lynx"; $BVersion=$match[2];
}
elseif( eregi("(links) \(([0-9]{1,2}.[0-9]{1,3})", $HTTP_USER_AGENT, $match) )
{
$BName = "Links"; $BVersion=$match[2];
}
elseif( eregi("(msie) ([0-9]{1,2}.[0-9]{1,3})", $HTTP_USER_AGENT, $match) )
{
$BName = "MSIE"; $BVersion=$match[2];
}
elseif( eregi("(netscape6)/(6.[0-9]{1,3})", $HTTP_USER_AGENT, $match) )
{
$BName = "Netscape"; $BVersion=$match[2];
}
elseif( eregi("mozilla/5", $HTTP_USER_AGENT) )
{
$BName = "Netscape"; $BVersion="Unknown";
}
elseif( eregi("(mozilla)/([0-9]{1,2}.[0-9]{1,3})", $HTTP_USER_AGENT, $match) )
{
$BName = "Netscape"; $BVersion=$match[2];
}
elseif( eregi("w3m", $HTTP_USER_AGENT) )
{
$BName = "w3m"; $BVersion="Unknown";
}
else
{
$BName = "Unknown"; $BVersion="Unknown";
}
if(eregi("linux", $HTTP_USER_AGENT))
{
$BPlatform = "Linux";
}
elseif( eregi("win32", $HTTP_USER_AGENT) )
{
$BPlatform = "Windows";
}
elseif( (eregi("(win)([0-9]{2})", $HTTP_USER_AGENT, $match) )
|| (eregi("(windows) ([0-9]{2})", $HTTP_USER_AGENT, $match) ))
{
$BPlatform = "Windows $match[2]";
}
elseif( eregi("(winnt)([0-9]{1,2}.[0-9]{1,2}){0,1}", $HTTP_USER_AGENT, $match) )
{
$BPlatform = "Windows NT $match[2]";
}
elseif( eregi("(windows nt)( ){0,1}([0-9]{1,2}.[0-9]{1,2}){0,1}", $HTTP_USER_AGENT, $match) )
{
$BPlatform = "Windows NT $match[3]";
}
elseif( eregi("mac", $HTTP_USER_AGENT) )
{
$BPlatform = "Macintosh";
}
elseif( eregi("(sunos) ([0-9]{1,2}.[0-9]{1,2}){0,1}", $HTTP_USER_AGENT, $match) )
{
$BPlatform = "SunOS $match[2]";
}
elseif( eregi("(beos) r([0-9]{1,2}.[0-9]{1,2}){0,1}", $HTTP_USER_AGENT, $match) )
{
$BPlatform = "BeOS $match[2]";
}
elseif( eregi("freebsd", $HTTP_USER_AGENT) )
{
$BPlatform = "FreeBSD";
}
elseif( eregi("openbsd", $HTTP_USER_AGENT) )
{
$BPlatform = "OpenBSD";
}
elseif( eregi("irix", $HTTP_USER_AGENT) )
{
$BPlatform = "IRIX";
}
elseif( eregi("os/2", $HTTP_USER_AGENT) )
{
$BPlatform = "OS/2";
}
elseif( eregi("plan9", $HTTP_USER_AGENT) )
{
$BPlatform = "Plan9";
}
elseif( eregi("unix", $HTTP_USER_AGENT)
|| eregi("hp-ux", $HTTP_USER_AGENT) )
{
$BPlatform = "Unix";
}
elseif( eregi("osf", $HTTP_USER_AGENT) )
{
$BPlatform = "OSF";
}
else
{
$BPlatform = "Unknown";
}
$return["name"] = $BName;
$return["version"] = $BVersion;
$return["platform"] = $BPlatform;
return $return;
}
function chat_display_version($version, $browser)
{
GLOBAL $CFG;
$checked = "";
if (($version == "sockets") OR ($version == "push_js"))
{
$checked = "checked";
}
if (($version == "sockets" OR $version == "push_js")
AND
($browser["name"] == "Lynx"
OR
$browser["name"] == "Links"
OR
$browser["name"] == "w3m"
OR
$browser["name"] == "Konqueror"
OR
($browser["name"] == "Netscape" AND substr($browser["version"], 0, 1) == "2")))
{
$checked = "";
}
if (($version == "text")
AND
($browser["name"] == "Lynx"
OR
$browser["name"] == "Links"
OR
$browser["name"] == "w3m"))
{
$checked = "checked";
}
if (($version == "header")
AND
($browser["name"] == "Konqueror"))
{
$checked = "checked";
}
if (($version == "header_js")
AND
($browser["name"] == "Netscape" AND substr($browser["version"], 0, 1) == "2"))
{
$checked = "checked";
}
?>
<tr>
<td valign="top">
<input type="radio" name="chat_chatversion" value="<?php echo $version; ?>"<?php echo $checked; ?>>
</td>
<td valign="top" align="left">
<font face="Arial" size="2">
<?php echo $chat_lang["gui_".$version]; ?>
</font>
</td>
</tr>
<?php
}
function chat_format_message($message, $courseid=0) {
/// Given a message object full of information, this function
/// formats it appropriately into text and html, then
/// returns the formatted data.
global $CFG, $USER;
$output = new object;
if (!$user = get_record("user", "id", $message->userid)) {
return "Error finding user id = $message->userid";
}
$picture = print_user_picture($user->id, 0, $user->picture, false, true, false);
if ($courseid) {
$picture = "<a target=\"_new\" href=\"$CFG->wwwroot/user/view.php?id=$user->id&course=$courseid\">$picture</a>";
}
$strtime = userdate($message->timestamp, get_string("strftimemessage", "chat"));
$output->beep = false; // by default
$text = $message->message;
if (!empty($message->system)) { /// It's a system message
$output->text = get_string("message$text", "chat", fullname($user));
$output->text = "$strtime: $output->text";
$output->html = "<table><tr><td valign=top>$picture</td><td>";
$output->html .= "<font size=2 color=\"#CCAAAA\">$output->text</font>";
$output->html .= "</td></tr></table>";
return $output;
}
convert_urls_into_links($text);
replace_smilies($text);
$text = filter_text($text, $courseid);
if (substr($text, 0, 5) == "beep ") { /// It's a beep!
$beepwho = trim(substr($text, 5));
if ($beepwho == "all") { // everyone
$outinfo = "$strtime: ". get_string("messagebeepseveryone", "chat", fullname($user));
$outmain = "";
$output->beep = true; // (eventually this should be set to
// to a filename uploaded by the user)
} else if ($beepwho == $USER->id) { // current user
$outinfo = "$strtime: ". get_string("messagebeepsyou", "chat", fullname($user));
$outmain = "";
$output->beep = true;
} else {
return false;
}
} else if (substr($text, 0, 1) == ":") { /// It's an MOO emote
$outinfo = $strtime;
$outmain = "$user->firstname ".substr($text, 1);
} else if (substr($text, 0, 1) == "/") { /// It's a user command
if (substr($text, 0, 4) == "/me ") {
$outinfo = $strtime;
$outmain = "$user->firstname ".substr($text, 4);
} else {
$outinfo = $strtime;
$outmain = $text;
}
} else { /// It's a normal message
$outinfo = "$strtime $user->firstname";
$outmain = $text;
}
/// Format the message as a small table
$output->text = strip_tags("$outinfo: $outmain");
$output->html = "<table><tr><td valign=top>$picture</td><td><font size=2>";
$output->html .= "<font color=\"#888888\">$outinfo</font>";
if ($outmain) {
$output->html .= ": $outmain";
}
$output->html .= "</font></td></tr></table>";
return $output;
}
?>
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