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464 lines
16 KiB
464 lines
16 KiB
<?php
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/* For licensing terms, see /license.txt */
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use ChamiloSession as Session;
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/**
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* Code library for showing Who is online
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*
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* @author Istvan Mandak, principal author
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* @author Denes Nagy, principal author
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* @author Bart Mollet
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* @author Roan Embrechts, cleaning and bugfixing
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* @package chamilo.whoisonline
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*/
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/**
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* Insert a login reference for the current user into the track_e_online stats table.
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* This table keeps trace of the last login. Nothing else matters (we don't keep traces of anything older)
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* @param int user id
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* @return void
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*/
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function LoginCheck($uid)
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{
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$_course = api_get_course_info();
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$uid = (int) $uid;
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$online_table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ONLINE);
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if (!empty($uid)) {
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$user_ip = '';
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if (!empty($_SERVER['REMOTE_ADDR'])) {
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$user_ip = Database::escape_string(api_get_real_ip());
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}
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$login_date = api_get_utc_datetime();
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$access_url_id = 1;
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if (api_get_multiple_access_url() && api_get_current_access_url_id()!=-1) {
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$access_url_id = api_get_current_access_url_id();
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}
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$session_id = api_get_session_id();
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// if the $_course array exists this means we are in a course and we have to store this in the who's online table also
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// to have the x users in this course feature working
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if (is_array($_course) && count($_course)>0 && !empty($_course['id'])) {
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$query = "REPLACE INTO ".$online_table ." (login_id,login_user_id,login_date,user_ip, c_id, session_id, access_url_id)
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VALUES ($uid,$uid,'$login_date','$user_ip', '".$_course['real_id']."' , '$session_id' , '$access_url_id' )";
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} else {
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$query = "REPLACE INTO ".$online_table ." (login_id,login_user_id,login_date,user_ip, c_id, session_id, access_url_id)
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VALUES ($uid,$uid,'$login_date','$user_ip', 0, '$session_id', '$access_url_id')";
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}
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Database::query($query);
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}
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}
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/**
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* @param int $userId
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*/
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function preventMultipleLogin($userId)
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{
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$table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ONLINE);
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$userId = intval($userId);
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if (api_get_setting('prevent_multiple_simultaneous_login') === 'true') {
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if (!empty($userId) && !api_is_anonymous()) {
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$isFirstLogin = Session::read('first_user_login');
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if (empty($isFirstLogin)) {
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$sql = "SELECT login_id FROM $table
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WHERE login_user_id = $userId
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LIMIT 1";
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$result = Database::query($sql);
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$loginData = array();
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if (Database::num_rows($result)) {
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$loginData = Database::fetch_array($result);
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}
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$userIsReallyOnline = user_is_online($userId);
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// Trying double login.
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if (!empty($loginData) && $userIsReallyOnline == true) {
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session_regenerate_id();
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Session::destroy();
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header('Location: '.api_get_path(WEB_PATH).'index.php?loginFailed=1&error=multiple_connection_not_allowed');
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exit;
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} else {
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// First time
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Session::write('first_user_login', 1);
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}
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}
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}
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}
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}
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/**
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* This function handles the logout and is called whenever there is a $_GET['logout']
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* @return void Directly redirects the user or leaves him where he is, but doesn't return anything
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* @author Fernando P. García <fernando@develcuy.com>
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*/
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function online_logout($user_id = null, $logout_redirect = false)
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{
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global $extAuthSource;
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// Database table definition
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$tbl_track_login = Database :: get_main_table(TABLE_STATISTIC_TRACK_E_LOGIN);
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if (empty($user_id)) {
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$user_id = isset($_GET['uid']) ? intval($_GET['uid']) : 0;
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}
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//Changing global chat status to offline
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if (api_is_global_chat_enabled()) {
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$chat = new Chat();
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$chat->setUserStatus(0);
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}
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// selecting the last login of the user
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$sql = "SELECT login_id, login_date
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FROM $tbl_track_login
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WHERE login_user_id = $user_id
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ORDER BY login_date DESC
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LIMIT 0,1";
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$q_last_connection = Database::query($sql);
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if (Database::num_rows($q_last_connection)>0) {
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$i_id_last_connection = Database::result($q_last_connection, 0, "login_id");
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}
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if (!isset($_SESSION['login_as'])) {
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$current_date = api_get_utc_datetime();
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$sql = "UPDATE $tbl_track_login SET logout_date='".$current_date."'
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WHERE login_id='$i_id_last_connection'";
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Database::query($sql);
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}
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LoginDelete($user_id); //from inc/lib/online.inc.php - removes the "online" status
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//the following code enables the use of an external logout function.
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//example: define a $extAuthSource['ldap']['logout']="file.php" in configuration.php
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// then a function called ldap_logout() inside that file
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// (using *authent_name*_logout as the function name) and the following code
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// will find and execute it
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$uinfo = api_get_user_info($user_id);
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if (($uinfo['auth_source'] != PLATFORM_AUTH_SOURCE) && is_array($extAuthSource)) {
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if (is_array($extAuthSource[$uinfo['auth_source']])) {
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$subarray = $extAuthSource[$uinfo['auth_source']];
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if (!empty($subarray['logout']) && file_exists($subarray['logout'])) {
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require_once($subarray['logout']);
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$logout_function = $uinfo['auth_source'].'_logout';
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if (function_exists($logout_function)) {
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$logout_function($uinfo);
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}
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}
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}
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}
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CourseChatUtils::exitChat($user_id);
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session_regenerate_id();
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Session::destroy();
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if ($logout_redirect) {
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header("Location: ".api_get_path(WEB_PATH)."index.php");
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exit;
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}
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}
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/**
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* Remove all login records from the track_e_online stats table, for the given user ID.
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* @param int User ID
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* @return void
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*/
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function LoginDelete($user_id)
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{
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$online_table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ONLINE);
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$user_id = intval($user_id);
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$query = "DELETE FROM " . $online_table . " WHERE login_user_id = $user_id";
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Database::query($query);
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}
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/**
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* @param int $user_id
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* @return bool
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*/
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function user_is_online($user_id)
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{
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$track_online_table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ONLINE);
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$table_user = Database::get_main_table(TABLE_MAIN_USER);
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$access_url_id = api_get_current_access_url_id();
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$time_limit = api_get_setting('time_limit_whosonline');
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$online_time = time() - $time_limit * 60;
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$limit_date = api_get_utc_datetime($online_time);
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$user_id = intval($user_id);
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$query = " SELECT login_user_id, login_date
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FROM $track_online_table track
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INNER JOIN $table_user u
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ON (u.id=track.login_user_id)
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WHERE
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track.access_url_id = $access_url_id AND
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login_date >= '".$limit_date."' AND
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u.id = $user_id
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LIMIT 1 ";
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$result = Database::query($query);
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if (Database::num_rows($result)) {
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return true;
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}
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return false;
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}
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/**
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* Gives a list of people online now (and in the last $valid minutes)
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*
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* @param $from
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* @param $number_of_items
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* @param null $column
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* @param null $direction
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* @param null $time_limit
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* @param bool $friends
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* @return array|bool For each line, a list of user IDs and login dates, or FALSE on error or empty results
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*/
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function who_is_online($from, $number_of_items, $column = null, $direction = null, $time_limit = null, $friends = false)
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{
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// Time limit in seconds?
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if (empty($time_limit)) {
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$time_limit = api_get_setting('time_limit_whosonline');
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} else {
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$time_limit = intval($time_limit);
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}
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$from = intval($from);
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$number_of_items = intval($number_of_items);
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if (empty($column)) {
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$column = 'picture_uri';
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if ($friends) {
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$column = 'login_date';
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}
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}
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if (empty($direction)) {
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$direction = 'DESC';
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} else {
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if (!in_array(strtolower($direction), array('asc', 'desc'))) {
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$direction = 'DESC';
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}
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}
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$online_time = time() - $time_limit * 60;
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$current_date = api_get_utc_datetime($online_time);
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$track_online_table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ONLINE);
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$friend_user_table = Database::get_main_table(TABLE_MAIN_USER_REL_USER);
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$table_user = Database::get_main_table(TABLE_MAIN_USER);
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if ($friends) {
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// who friends from social network is online
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$query = "SELECT DISTINCT login_user_id, login_date
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FROM $track_online_table INNER JOIN $friend_user_table
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ON (friend_user_id = login_user_id)
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WHERE
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login_date >= '".$current_date."' AND
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friend_user_id <> '".api_get_user_id()."' AND
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relation_type='".USER_RELATION_TYPE_FRIEND."' AND
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user_id = '".api_get_user_id()."'
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ORDER BY $column $direction
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LIMIT $from, $number_of_items";
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} else {
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$query = "SELECT DISTINCT login_user_id, login_date
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FROM ".$track_online_table ." e
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INNER JOIN ".$table_user ." u ON (u.id = e.login_user_id)
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WHERE u.status != ".ANONYMOUS." AND login_date >= '".$current_date."'
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ORDER BY $column $direction
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LIMIT $from, $number_of_items";
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}
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if (api_get_multiple_access_url()) {
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$access_url_id = api_get_current_access_url_id();
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if ($access_url_id != -1) {
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if ($friends) {
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// friends from social network is online
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$query = "SELECT distinct login_user_id, login_date
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FROM $track_online_table track INNER JOIN $friend_user_table
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ON (friend_user_id = login_user_id)
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WHERE track.access_url_id = $access_url_id AND
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login_date >= '".$current_date."' AND
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friend_user_id <> '".api_get_user_id()."' AND
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relation_type='".USER_RELATION_TYPE_FRIEND."'
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ORDER BY $column $direction
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LIMIT $from, $number_of_items";
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} else {
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// all users online
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$query = "SELECT login_user_id, login_date
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FROM ".$track_online_table ." track
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INNER JOIN ".$table_user ." u
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ON (u.id=track.login_user_id)
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WHERE u.status != ".ANONYMOUS." AND track.access_url_id = $access_url_id AND
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login_date >= '".$current_date."'
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ORDER BY $column $direction
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LIMIT $from, $number_of_items";
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}
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}
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}
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//This query will show all registered users. Only for dev purposes.
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/*$query = "SELECT DISTINCT u.id as login_user_id, login_date FROM ".$track_online_table ." e , $table_user u
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GROUP by u.id
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ORDER BY $column $direction
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LIMIT $from, $number_of_items";*/
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$result = Database::query($query);
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if ($result) {
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$users_online = array();
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while (list($login_user_id, $login_date) = Database::fetch_row($result)) {
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$users_online[] = $login_user_id;
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}
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return $users_online;
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} else {
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return false;
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}
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}
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function who_is_online_count($time_limit = null, $friends = false)
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{
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if (empty($time_limit)) {
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$time_limit = api_get_setting('time_limit_whosonline');
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} else {
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$time_limit = intval($time_limit);
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}
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$track_online_table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ONLINE);
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$friend_user_table = Database::get_main_table(TABLE_MAIN_USER_REL_USER);
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$table_user = Database::get_main_table(TABLE_MAIN_USER);
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$online_time = time() - $time_limit * 60;
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$current_date = api_get_utc_datetime($online_time);
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if ($friends) {
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// who friends from social network is online
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$query = "SELECT DISTINCT count(login_user_id) as count
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FROM $track_online_table INNER JOIN $friend_user_table
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ON (friend_user_id = login_user_id)
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WHERE
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login_date >= '$current_date' AND
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friend_user_id <> '".api_get_user_id()."' AND
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relation_type='".USER_RELATION_TYPE_FRIEND."' AND
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user_id = '".api_get_user_id()."' ";
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} else {
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// All users online
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$query = "SELECT count(login_id) as count
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FROM $track_online_table track INNER JOIN $table_user u
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ON (u.id=track.login_user_id)
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WHERE u.status != ".ANONYMOUS." AND login_date >= '$current_date' ";
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}
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if (api_get_multiple_access_url()) {
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$access_url_id = api_get_current_access_url_id();
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if ($access_url_id != -1) {
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if ($friends) {
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// friends from social network is online
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$query = "SELECT DISTINCT count(login_user_id) as count
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FROM $track_online_table track
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INNER JOIN $friend_user_table ON (friend_user_id = login_user_id)
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WHERE
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track.access_url_id = $access_url_id AND
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login_date >= '".$current_date."' AND
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friend_user_id <> '".api_get_user_id()."' AND
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relation_type='".USER_RELATION_TYPE_FRIEND."' ";
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} else {
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// all users online
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$query = "SELECT count(login_id) as count FROM $track_online_table track
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INNER JOIN $table_user u ON (u.id=track.login_user_id)
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WHERE
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u.status != ".ANONYMOUS." AND
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track.access_url_id = $access_url_id AND
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login_date >= '$current_date' ";
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}
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}
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}
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// Dev purposes show all users online
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/*$table_user = Database::get_main_table(TABLE_MAIN_USER);
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$query = "SELECT count(*) as count FROM ".$table_user;*/
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$result = Database::query($query);
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if (Database::num_rows($result) > 0) {
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$row = Database::fetch_array($result);
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return $row['count'];
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} else {
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return false;
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}
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}
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/**
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* Returns a list (array) of users who are online and in this course.
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* @param int User ID
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* @param int Number of minutes
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* @param string Course code (could be empty, but then the function returns false)
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* @return array Each line gives a user id and a login time
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*/
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function who_is_online_in_this_course($from, $number_of_items, $uid, $time_limit, $course_code)
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{
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if (empty($course_code)) {
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return false;
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}
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if (empty($time_limit)) {
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$time_limit = api_get_setting('time_limit_whosonline');
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} else {
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$time_limit = intval($time_limit);
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}
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$online_time = time() - $time_limit * 60;
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$current_date = api_get_utc_datetime($online_time);
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$track_online_table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ONLINE);
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$course_code = Database::escape_string($course_code);
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$courseInfo = api_get_course_info($course_code);
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$courseId = $courseInfo['real_id'];
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$from = intval($from);
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$number_of_items = intval($number_of_items);
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$query = "SELECT login_user_id, login_date FROM $track_online_table
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WHERE login_user_id <> 2 AND c_id = $courseId AND login_date >= '$current_date'
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LIMIT $from, $number_of_items ";
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$result = Database::query($query);
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if ($result) {
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$users_online = array();
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while(list($login_user_id, $login_date) = Database::fetch_row($result)) {
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$users_online[] = $login_user_id;
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}
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return $users_online;
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} else {
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return false;
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}
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}
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function who_is_online_in_this_course_count($uid, $time_limit, $coursecode=null)
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{
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if (empty($coursecode)) {
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return false;
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}
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$track_online_table = Database::get_main_table(TABLE_STATISTIC_TRACK_E_ONLINE);
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$time_limit = Database::escape_string($time_limit);
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$online_time = time() - $time_limit * 60;
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$current_date = api_get_utc_datetime($online_time);
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$courseId = api_get_course_int_id($coursecode);
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if (empty($courseId)) {
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return false;
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}
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$query = "SELECT count(login_user_id) as count
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FROM $track_online_table
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WHERE login_user_id <> 2 AND c_id = $courseId AND login_date >= '$current_date' ";
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$result = Database::query($query);
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if (Database::num_rows($result) > 0) {
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$row = Database::fetch_array($result);
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return $row['count'];
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} else {
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return false;
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}
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}
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