class.ilLPStatusTypicalLearningTime.php

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<?php

/* Copyright (c) 1998-2010 ILIAS open source, Extended GPL, see docs/LICENSE */

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

class ilLPStatusTypicalLearningTime extends ilLPStatus
{

        function ilLPStatusTypicalLearningTime($a_obj_id)
        {
                global $ilDB;

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

        function _getInProgress($a_obj_id)
        {
                global $ilDB;

                include_once './Services/MetaData/classes/class.ilMDEducational.php';

                $status_info = ilLPStatusWrapper::_getStatusInfo($a_obj_id);
                $tlt = $status_info['tlt'];

                include_once './Services/Tracking/classes/class.ilChangeEvent.php';
                $all = ilChangeEvent::_lookupReadEvents($a_obj_id);

                foreach($all as $event)
                {
                        if($event['spent_seconds'] < $tlt)
                        {
                                $user_ids[] = $event['usr_id'];
                        }
                }
                return $user_ids ? $user_ids : array();
        }

        function _getCompleted($a_obj_id)
        {
                global $ilDB;

                include_once './Services/MetaData/classes/class.ilMDEducational.php';

                $status_info = ilLPStatusWrapper::_getStatusInfo($a_obj_id);
                $tlt = $status_info['tlt'];

                // TODO: move to status info
                include_once './Services/Tracking/classes/class.ilChangeEvent.php';
                $all = ilChangeEvent::_lookupReadEvents($a_obj_id);

                foreach($all as $event)
                {
                        if($event['spent_seconds'] >= $tlt)
                        {
                                $user_ids[] = $event['usr_id'];
                        }
                }
                return $user_ids ? $user_ids : array();
        }

        function _getStatusInfo($a_obj_id)
        {
                include_once './Services/MetaData/classes/class.ilMDEducational.php';
                $status_info['tlt'] = ilMDEducational::_getTypicalLearningTimeSeconds($a_obj_id);

                return $status_info;
        }
        
        function determineStatus($a_obj_id, $a_user_id, $a_obj = null)
        {
                global $ilObjDataCache, $ilDB;
                
                $status = LP_STATUS_NOT_ATTEMPTED_NUM;
                switch ($ilObjDataCache->lookupType($a_obj_id))
                {
                        case 'lm':
                                if (ilChangeEvent::hasAccessed($a_obj_id, $a_user_id))
                                {
                                        $status = LP_STATUS_IN_PROGRESS_NUM;
                                        
                                        // completed?
                                        $status_info = ilLPStatusWrapper::_getStatusInfo($a_obj_id);
                                        $tlt = $status_info['tlt'];

                                        include_once './Services/Tracking/classes/class.ilChangeEvent.php';
                                        $re = ilChangeEvent::_lookupReadEvents($a_obj_id, $a_user_id);
                                        if ($re[0]['spent_seconds'] >= $tlt)
                                        {
                                                $status = LP_STATUS_COMPLETED_NUM;
                                        }
                                }
                                break;                  
                }
                return $status;         
        }               

        function determinePercentage($a_obj_id, $a_user_id, $a_obj = null)
        {
                $tlt = (int) ilMDEducational::_getTypicalLearningTimeSeconds($a_obj_id);
                $re = ilChangeEvent::_lookupReadEvents($a_obj_id, $a_user_id);
                $spent = (int) $re[0]["spent_seconds"];

                if ($tlt > 0)
                {
                        $per = min(100, 100 / $tlt * $spent);
                }
                else
                {
                        $per = 100;
                }

                return $per;
        }
}       
?>