Services/Tracking/classes/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 $ilDB,$ilObjDataCache;

                if(!strlen($a_obj_type))
                {
                        $a_obj_type = $ilObjDataCache->lookupType($a_obj_id);
                }

                if($progress = ilLearningProgress::_getProgress($a_user_id,$a_obj_id))
                {
                        ilLearningProgress::_updateProgress($progress);
                        return true;
                }
                $query = "INSERT INTO ut_learning_progress ".
                        "SET user_id = '".$a_user_id."', ".
                        "obj_type = '".$a_obj_type."', ".
                        "obj_id = '".$a_obj_id."', ".
                        "spent_time = '0',".
                        "access_time = '".time()."', ".
                        "visits = '1'";

                $ilDB->query($query);
                return true;
        }

        function _getProgress($a_user_id,$a_obj_id)
        {
                global $ilDB;

                $query = "SELECT * FROM ut_learning_progress ".
                        "WHERE user_id = '".$a_user_id."' ".
                        "AND obj_id = '".$a_obj_id."'";
                $res = $ilDB->query($query);

                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $progress['lp_id'] = $row->lp_id;
                        $progress['obj_id'] = $row->obj_id;
                        $progress['obj_type'] = $row->obj_type;
                        $progress['user_id'] = $row->user_id;
                        $progress['spent_time'] = $row->spent_time;
                        $progress['access_time'] = $row->access_time;
                        $progress['visits'] = $row->visits;
                }
                return $progress ? $progress : array();
        }

        function _updateProgress($data)
        {
                global $ilDB;

                $spent = $data['spent_time'];
                
                include_once('Services/Tracking/classes/class.ilObjUserTracking.php');
                if((time() - $data['access_time']) <= ilObjUserTracking::_getValidTimeSpan())
                {
                        $spent = $data['spent_time'] + time() - $data['access_time'];
                }
                $visits = $data['visits'] + 1;
                
                $query = "UPDATE ut_learning_progress ".
                        "SET visits = visits + 1, ".
                        "spent_time = '".$spent."', ".
                        "access_time = '".time()."' ". 
                        "WHERE lp_id = '".$data['lp_id']."'";

                $ilDB->query($query);
        }
}
?>