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<?PHP //$Id$
class block_online_users extends block_base {
function init() {
$this->title = get_string('blockname','block_online_users');
$this->version = 2004111600;
}
function has_config() {return true;}
function get_content() {
global $USER, $CFG;
if ($this->content !== NULL) {
return $this->content;
}
$this->content = new stdClass;
$this->content->text = '';
$this->content->footer = '';
if (empty($this->instance)) {
return $this->content;
}
$course = get_record('course', 'id', $this->instance->pageid);
$timetoshowusers = 300; //Seconds default
if (isset($CFG->block_online_users_timetosee)) {
$timetoshowusers = $CFG->block_online_users_timetosee * 60;
}
$timefrom = time()-$timetoshowusers;
//Calculate if we are in separate groups
$isseparategroups = ($course->groupmode == SEPARATEGROUPS && $course->groupmodeforce && !isteacheredit($this->instance->pageid));
//Get the user current group
$currentgroup = $isseparategroups ? get_current_group($this->instance->pageid) : NULL;
$groupmembers = "";
$groupselect = "";
//Add this to the SQL to show only group users
if ($currentgroup !== NULL) {
$groupmembers = ", {$CFG->prefix}groups_members gm ";
$groupselect .= " AND u.id = gm.userid AND gm.groupid = '$currentgroup'";
}
if ($this->instance->pageid == SITEID) { // Site-level
$courseselect = '';
$timeselect = "AND (s.timeaccess > $timefrom OR u.lastaccess > $timefrom)";
} else {
$courseselect = "AND s.course = '".$this->instance->pageid."'";
$timeselect = "AND s.timeaccess > $timefrom";
}
$users = array();
if ($students = get_records_sql("SELECT u.id, u.username, u.firstname, u.lastname, u.picture, u.lastaccess, s.timeaccess
FROM {$CFG->prefix}user u,
{$CFG->prefix}user_students s
$groupmembers
WHERE u.id = s.userid $courseselect $groupselect $timeselect
ORDER BY s.timeaccess DESC")) {
foreach ($students as $student) {
$student->fullname = fullname($student);
$users[$student->id] = $student;
}
}
if ($this->instance->pageid == SITEID && $CFG->allusersaresitestudents) {
if ($siteusers = get_records_sql("SELECT u.id, u.username, u.firstname, u.lastname, u.picture, u.lastaccess
FROM {$CFG->prefix}user u
WHERE u.lastaccess > $timefrom AND u.username <> 'guest'
ORDER BY u.lastaccess DESC")) {
foreach ($siteusers as $siteuser) {
$siteuser->fullname = fullname($siteuser);
$siteuser->timeaccess = $siteuser->lastaccess;
$users[$siteuser->id] = $siteuser;
}
}
}
if ($teachers = get_records_sql("SELECT u.id, u.username, u.firstname, u.lastname, u.picture, u.lastaccess, s.timeaccess
FROM {$CFG->prefix}user u,
{$CFG->prefix}user_teachers s
$groupmembers
WHERE u.id = s.userid $courseselect $groupselect $timeselect
ORDER BY s.timeaccess DESC")) {
foreach ($teachers as $teacher) {
$teacher->fullname = '<b>'.fullname($teacher).'</b>';
$users[$teacher->id] = $teacher;
}
}
//Calculate minutes
$minutes = floor($timetoshowusers/60);
$this->content->text = "<center><font size=\"-2\">(".get_string("periodnminutes","block_online_users",$minutes).")</font></center>";
//Now, we have in users, the list of users to show
//Because they are online
if (!empty($users)) {
foreach ($users as $user) {
$this->content->text .= '<div class="listentry">';
$timeago = format_time(time() - max($user->timeaccess, $user->lastaccess)); //bruno to calculate correctly on frontpage
if ($user->picture) {
if ($CFG->slasharguments) {
$imgtag = '<img src="'.$CFG->wwwroot.'/user/pix.php/'.$user->id.'/f2.jpg" style="height: 16px; width:16px; vertical-align: middle;" alt="" /> ';
} else {
$imgtag = '<img src="'.$CFG->wwwroot.'/user/pix.php?file=/'.$user->id.'/f2.jpg" style="height: 16px; width:16px; vertical-align: middle;" alt="" /> ';
}
$this->content->text .= $imgtag;
} else {
$this->content->text .= '<img src="'.$CFG->pixpath.'/i/user.gif" style="height: 16px; width:16px; vertical-align: middle;" alt="" /> ';
}
$this->content->text .= '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$user->id.'&amp;course='.$this->instance->pageid.'" title="'.$timeago.'">'.$user->fullname.'</a>';
if (!empty($USER->id) and ($USER->id != $user->id) and !empty($CFG->messaging) and !isguest()) { // Only when logged in
$this->content->text .= '&nbsp;<a target="message_'.$user->id.'" href="'.$CFG->wwwroot.'/message/discussion.php?id='.$user->id.'" onclick="return openpopup(\'/message/discussion.php?id='.$user->id.'\', \'message_'.$user->id.'\', \'menubar=0,location=0,scrollbars,status,resizable,width=400,height=500\', 0);"><img height="11" width="11" src="'.$CFG->pixpath.'/t/message.gif" alt="" /></a>';
}
$this->content->text .= '</div>';
}
} else {
$this->content->text .= "<center><font size=\"-1\">".get_string("none")."</font></center>";
}
return $this->content;
}
}
?>
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