class.ilLearningProgress.php

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<?php
/*
        +-----------------------------------------------------------------------------+
        | ILIAS open source                                                           |
        +-----------------------------------------------------------------------------+
        | Copyright (c) 1998-2001 ILIAS open source, University of Cologne            |
        |                                                                             |
        | This program is free software; you can redistribute it and/or               |
        | modify it under the terms of the GNU General Public License                 |
        | as published by the Free Software Foundation; either version 2              |
        | of the License, or (at your option) any later version.                      |
        |                                                                             |
        | This program is distributed in the hope that it will be useful,             |
        | but WITHOUT ANY WARRANTY; without even the implied warranty of              |
        | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the               |
        | GNU General Public License for more details.                                |
        |                                                                             |
        | You should have received a copy of the GNU General Public License           |
        | along with this program; if not, write to the Free Software                 |
        | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA. |
        +-----------------------------------------------------------------------------+
*/

class ilLearningProgress
{
        var $db = null;

        function ilLearningProgress()
        {
                global $ilDB;
                
                $this->db = $ilDB;
        }

        // Static
        function _tracProgress($a_user_id,$a_obj_id, $a_obj_type = '')
        {
                global $ilDB;

                require_once 'Services/Tracking/classes/class.ilChangeEvent.php';
                ilChangeEvent::_recordReadEvent($a_obj_id, $a_user_id);
                return true;
        }

        function _getProgress($a_user_id,$a_obj_id)
        {
                require_once 'Services/Tracking/classes/class.ilChangeEvent.php';
                $events = ilChangeEvent::_lookupReadEvents($a_obj_id, $a_user_id);

                foreach($events as $row)
                {
                        if ($progress)
                        {
                                $progress['spent_seconds'] += $row['spent_seconds'];
                                $progress['access_time'] = max($progress['access_time'], $row['last_access']);
                        }
                        else
                        {
                                $progress['obj_id'] = $row['obj_id'];
                                $progress['user_id'] = $row['usr_id'];
                                $progress['spent_seconds'] = $row['spent_seconds'];
                                $progress['access_time'] = $row['last_access'];
                                $progress['visits'] = $row['read_count'];
                        }
                }
                return $progress ? $progress : array();
        }
        
        public static function _lookupProgressByObjId($a_obj_id)
        {
                include_once('./Services/Tracking/classes/class.ilChangeEvent.php');
                foreach(ilChangeEvent::_lookupReadEvents($a_obj_id) as $row)
                {
                        if(isset($progress[$row['usr_id']]))
                        {
                                $progress[$row['usr_id']]['spent_seconds'] += $row['spent_seconds'];
                                $progress[$row['usr_id']]['read_count'] += $row['read_count'];
                                $progress[$row['usr_id']]['ts'] = max($row['last_access'],$progress[$row['usr_id']]['ts']);
                        }
                        else
                        {
                                $progress[$row['usr_id']]['spent_seconds'] = $row['spent_seconds'];
                                $progress[$row['usr_id']]['read_count'] = $row['read_count'];
                                $progress[$row['usr_id']]['ts'] = $row['last_access'];
                                
                        }
                        $progress[$row['usr_id']]['usr_id'] = $row['usr_id'];
                        $progress[$row['usr_id']]['obj_id'] = $row['obj_id'];
                }
                return $progress ? $progress : array();
        }

        function _updateProgress($data)
        {
                require_once 'Services/Tracking/classes/class.ilChangeEvent.php';
                ilChangeEvent::_recordReadEvent($data['obj_id'], $data['usr_id']);
        }
}
?>