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257 lines
8.2 KiB
257 lines
8.2 KiB
<?php
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/*
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==============================================================================
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Dokeos - elearning and course management software
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Copyright (c) 2004-2008 Dokeos SPRL
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Copyright (c) Istvan Mandak
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For a full list of contributors, see "credits.txt".
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The full license can be read in "license.txt".
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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See the GNU General Public License for more details.
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Contact address: Dokeos, rue du Corbeau, 108, B-1030 Brussels, Belgium
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Mail: info@dokeos.com
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==============================================================================
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*/
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/**
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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 dokeos.whoisonline
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==============================================================================
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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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global $_course;
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$uid = (int) $uid;
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$online_table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ONLINE);
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if (!empty($uid))
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{
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$login_ip = '';
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if(!empty($_SERVER['REMOTE_ADDR']))
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{
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$login_ip = Database::escape_string($_SERVER['REMOTE_ADDR']);
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}
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$reallyNow = time();
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$login_date = date("Y-m-d H:i:s",$reallyNow);
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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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{
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$query = "REPLACE INTO ".$online_table ." (login_id,login_user_id,login_date,login_ip, course) VALUES ($uid,$uid,'$login_date','$login_ip', '".$_course['id']."')";
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}
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else
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{
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$query = "REPLACE INTO ".$online_table ." (login_id,login_user_id,login_date,login_ip) VALUES ($uid,$uid,'$login_date','$login_ip')";
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}
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@api_sql_query($query,__FILE__,__LINE__);
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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_statistic_table(TABLE_STATISTIC_TRACK_E_ONLINE);
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$user_id = (int) $user_id;
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$query = "DELETE FROM ".$online_table ." WHERE login_user_id = '".$user_id."'";
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@api_sql_query($query,__FILE__,__LINE__);
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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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* @param int User ID - useless
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* @param string Statistics database name - useless
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* @param int Number of minutes to account logins for
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* @return array For each line, a list of user IDs and login dates, or FALSE on error or empty results
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* @todo remove parameter $statistics_database which is no longer necessary
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*/
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function WhoIsOnline($uid=0,$statistics_database='',$valid)
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{
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$valid = (int) $valid;
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$current_date=date('Y-m-d H:i:s',time());
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$track_online_table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ONLINE);
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$query = "SELECT login_user_id,login_date FROM ".$track_online_table ." WHERE DATE_ADD(login_date,INTERVAL $valid MINUTE) >= '".$current_date."' ";
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$result = @api_sql_query($query,__FILE__,__LINE__);
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if (count($result)>0)
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{
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$rtime = time();
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$rdate = date("Y-m-d H:i:s",$rtime);
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$validtime = mktime(date("H"),date("i")-$valid,date("s"),date("m"),date("d"),date("Y"));
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$rarray = array();
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while(list($login_user_id,$login_date)= Database::fetch_row($result))
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{
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$barray = array();
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array_push($barray,$login_user_id);
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array_push($barray,$login_date);
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// YYYY-MM-DD HH:MM:SS, db date format
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$hour = substr($login_date,11,2);
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$minute = substr($login_date,14,2);
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$secund = substr($login_date,17,2);
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$month = substr($login_date,5,2);
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$day = substr($login_date,8,2);
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$year = substr($login_date,0,4);
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// db timestamp
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$dbtime = mktime($hour,$minute,$secund,$month,$day,$year);
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if ($dbtime>$validtime)
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{
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array_push($rarray,$barray);
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}
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}
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return $rarray;
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}
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else
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{
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return false;
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}
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}
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/**
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* Gets the full user name for a given user ID
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* @param int User ID
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* @return string The full username, elements separated by an HTML space
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*/
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function GetFullUserName($uid)
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{
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$uid = (int) $uid;
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$user_table = Database::get_main_table(TABLE_MAIN_USER);
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$query = "SELECT firstname,lastname FROM ".$user_table." WHERE user_id='$uid'";
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$result = @api_sql_query($query,__FILE__,__LINE__);
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if (count($result)>0)
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{
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$str = "";
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while(list($firstname,$lastname)= Database::fetch_array($result))
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{
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$str = $lastname." ".$firstname;
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return $str;
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}
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}
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}
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/**
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* Gets a list of chat calls made by others to the current user (info kept in main.user table)
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* @param none - taken from global space
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* @return string An HTML-formatted message
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*/
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function chatcall() {
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global $_user, $_cid;
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if (!$_user['user_id'])
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{
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return (false);
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}
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$track_user_table = Database::get_main_table(TABLE_MAIN_USER);
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$sql="select chatcall_user_id, chatcall_date from $track_user_table where ( user_id = '".$_user['user_id']."' )";
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$result=api_sql_query($sql,__FILE__,__LINE__);
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$row=Database::fetch_array($result);
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$login_date=$row['chatcall_date'];
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$hour = substr($login_date,11,2);
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$minute = substr($login_date,14,2);
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$secund = substr($login_date,17,2);
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$month = substr($login_date,5,2);
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$day = substr($login_date,8,2);
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$year = substr($login_date,0,4);
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$calltime = mktime($hour,$minute,$secund,$month,$day,$year);
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$time = time();
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$time = date("Y-m-d H:i:s", $time);
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$minute_passed=5; //within this limit, the chat call request is valid
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$limittime = mktime(date("H"),date("i")-$minute_passed,date("s"),date("m"),date("d"),date("Y"));
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if (($row['chatcall_user_id']) and ($calltime>$limittime)) {
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$webpath=api_get_path(WEB_CODE_PATH);
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$message=get_lang('YouWereCalled').' : '.GetFullUserName($row['chatcall_user_id'],'').'<br>'.get_lang('DoYouAccept')
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."<p>"
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."<a href=\"".$webpath."chat/chat.php?cidReq=".$_cid."&origin=whoisonlinejoin\">"
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. get_lang("Yes")
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."</a>"
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." | "
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."<a href=\"".api_get_path('WEB_PATH')."webchatdeny.php\">"
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. get_lang("No")
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."</a>"
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."</p>";
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return($message);
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}
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else
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{
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return(false);
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}
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}
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/**
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* Returns a list (array) of users who are online and in this course.
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* @param int User ID
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* @param int Number of minutes
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* @param string Course code (could be empty, but then the function returns false)
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* @return array Each line gives a user id and a login time
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*/
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function who_is_online_in_this_course($uid, $valid, $coursecode=null)
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{
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if(empty($coursecode)) return false;
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$track_online_table = Database::get_statistic_table(TABLE_STATISTIC_TRACK_E_ONLINE);
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$coursecode = Database::escape_string($coursecode);
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$query = "SELECT login_user_id,login_date FROM ".$track_online_table ." WHERE course='".$coursecode."' AND DATE_ADD(login_date,INTERVAL $valid MINUTE) >= NOW() ";
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$result = api_sql_query($query,__FILE__,__LINE__);
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if (count($result)>0)
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{
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$rtime = time();
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$rdate = date("Y-m-d H:i:s",$rtime);
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$validtime = mktime(date("H"),date("i")-$valid,date("s"),date("m"),date("d"),date("Y"));
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$rarray = array();
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while(list($login_user_id,$login_date)= mysql_fetch_row($result))
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{
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$barray = array();
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array_push($barray,$login_user_id);
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array_push($barray,$login_date);
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// YYYY-MM-DD HH:MM:SS, db date format
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$hour = substr($login_date,11,2);
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$minute = substr($login_date,14,2);
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$secund = substr($login_date,17,2);
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$month = substr($login_date,5,2);
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$day = substr($login_date,8,2);
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$year = substr($login_date,0,4);
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// db timestamp
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$dbtime = mktime($hour,$minute,$secund,$month,$day,$year);
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if ($dbtime >= $validtime)
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{
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array_push($rarray,$barray);
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}
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}
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return $rarray;
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}
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else
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{
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return false;
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}
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} |