class.ilLPStatusObjectives.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. |
        +-----------------------------------------------------------------------------+
*/

include_once 'Services/Tracking/classes/class.ilLPStatus.php';

class ilLPStatusObjectives extends ilLPStatus
{

        function ilLPStatusObjectives($a_obj_id)
        {
                global $ilDB;

                parent::ilLPStatus($a_obj_id);
                $this->db =& $ilDB;
        }

        function _getNotAttempted($a_obj_id)
        {
                global $ilObjDataCache;

                global $ilBench;
                $ilBench->start('LearningProgress','9171_LPStatusObjectives_notAttempted');

                include_once 'Modules/Course/classes/class.ilCourseParticipants.php';
                $members_obj = ilCourseParticipants::_getInstanceByObjId($a_obj_id);
                $members = $members_obj->getParticipants();
                        
                // diff in progress and completed (use stored result in LPStatusWrapper)
                $users = array_diff($members,$inp = ilLPStatusWrapper::_getInProgress($a_obj_id));
                $users = array_diff($users,$com = ilLPStatusWrapper::_getCompleted($a_obj_id));

                $ilBench->stop('LearningProgress','9171_LPStatusObjectives_notAttempted');
                return $users ? $users : array();
        }

        function _getInProgress($a_obj_id)
        {
                global $ilDB;

                $completed = ilLPStatusWrapper::_getCompleted($a_obj_id);
                
                include_once 'Modules/Course/classes/class.ilCourseParticipants.php';
                $members_obj = ilCourseParticipants::_getInstanceByObjId($a_obj_id);
                $members = $members_obj->getParticipants();

                $query = "SELECT DISTINCT(usr_id) FROM read_event ".
                        "WHERE obj_id = '".$a_obj_id."'";

                $res = $ilDB->query($query);
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        if(!in_array($row->usr_id,$completed) and in_array($row->usr_id,$members))
                        {
                                $user_ids[] = $row->usr_id;
                        }
                }
                return $user_ids ? $user_ids : array();
        }

        function _getCompleted($a_obj_id)
        {
                global $ilDB;

                global $ilBench;
                $ilBench->start('LearningProgress','9173_LPStatusObjectives_completed');

                $status_info = ilLPStatusWrapper::_getStatusInfo($a_obj_id);
                foreach($status_info['objective_result'] as $user_id => $completed)
                {
                        if(count($completed) == $status_info['num_objectives'])
                        {
                                $usr_ids[] = $user_id;
                        }
                }
                $ilBench->stop('LearningProgress','9173_LPStatusObjectives_completed');
                return $usr_ids ? $usr_ids : array();
        }


        function _getStatusInfo($a_obj_id)
        {
                include_once 'Modules/Course/classes/class.ilCourseObjective.php';

                global $ilDB;

                $status_info['objective_result'] = array();
                $status_info['objectives'] = ilCourseObjective::_getObjectiveIds($a_obj_id);
                $status_info['num_objectives'] = count($status_info['objectives']);

                if(!$status_info['num_objectives'])
                {
                        return $status_info;
                }
                else
                {
                        $in = "objective_id IN('".implode("','",$status_info['objectives'])."') ";
                }

                $query = "SELECT * FROM crs_objective_status ".
                        "WHERE ".$in;

                $res = $ilDB->query($query);
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $status_info['completed'][$row->objective_id][] = $row->user_id;
                        $status_info['objective_result'][$row->user_id][$row->objective_id] = $row->objective_id;
                }

                // Read title/description
                $query = "SELECT * FROM crs_objectives ".
                        "WHERE ".$in;
                $res = $ilDB->query($query);
                while($row = $res->fetchRow(DB_FETCHMODE_OBJECT))
                {
                        $status_info['objective_title'][$row->objective_id] = $row->title;
                        $status_info['objective_description'][$row->objective_id] = $row->description;
                }
                return $status_info;
        }
}
                

?>