class.ilOnlineTracking.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilOnlineTracking
{
        // Static
        function _getOnlineTime($a_user_id)
        {
                global $ilDB;

                $res = $ilDB->query("SELECT * FROM ut_online WHERE usr_id = ".
                        $ilDB->quote($a_user_id, "integer"));
                while ($row = $ilDB->fetchObject($res))
                {
                        $access_time = $row->access_time;
                        $online_time = $row->online_time;
                }
                return (int) $online_time;
        }

                

        function _addUser($a_user_id)
        {
                global $ilDB;

                $res = $ilDB->query("SELECT * FROM ut_online WHERE usr_id = ".
                        $ilDB->quote($a_user_id, "integer"));
                
                if($res->numRows())
                {
                        return false;
                }

                $ilDB->manipulate(sprintf("INSERT INTO ut_online (usr_id, access_time) VALUES (%s,%s)",
                        $ilDB->quote($a_user_id, "integer"),
                        $ilDB->quote(time(), "integer")));

                return true;
        }

        function _updateAccess($a_usr_id)
        {
                global $ilDB,$ilias;

                $query = "SELECT * FROM ut_online WHERE usr_id = ".
                        $ilDB->quote($a_usr_id,'integer');
                $res = $ilDB->query($query);
                
                if(!$res->numRows())
                {
                        return false;
                }
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $access_time = $row->access_time;
                        $online_time = $row->online_time;
                }
                $time_span = (int) $ilias->getSetting("tracking_time_span",300);

                if(($diff = time() - $access_time) <= $time_span)
                {
                        $ilDB->manipulate(sprintf("UPDATE ut_online SET online_time = online_time + %s, ".
                                "access_time = %s WHERE usr_id = %s",
                                $ilDB->quote($diff, "integer"),
                                $ilDB->quote(time(), "integer"),
                                $ilDB->quote($a_usr_id, "integer")));
                }
                else
                {
                        $ilDB->manipulate(sprintf("UPDATE ut_online SET ".
                                "access_time = %s WHERE usr_id = %s",
                                $ilDB->quote(time(), "integer"),
                                $ilDB->quote($a_usr_id, "integer")));
                }
                return true;
        }
}
?>