class.ilLPStatusObjectives.php

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<?php

/* Copyright (c) 1998-2011 ILIAS open source, Extended GPL, see docs/LICENSE */

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();

                include_once './Services/Tracking/classes/class.ilChangeEvent.php';
                $all = ilChangeEvent::lookupUsersInProgress($a_obj_id);
                foreach($all as $user_id)
                {
                        if(!in_array($user_id,$completed) and in_array($user_id,$members))
                        {
                                $user_ids[] = $user_id;
                        }
                }
                return $user_ids ? $user_ids : array();
        }

        function _getCompleted($a_obj_id)
        {
                global $ilDB;

                global $ilBench;

                $status_info = ilLPStatusWrapper::_getStatusInfo($a_obj_id);
                foreach($status_info['objective_result'] as $user_id => $completed)
                {
                        if(count($completed) == $status_info['num_objectives'])
                        {
                                $usr_ids[] = $user_id;
                        }
                }
                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 = $ilDB->in('objective_id',$status_info['objectives'], false,'integer');
                }

                $query = "SELECT * FROM crs_objective_status ".
                        "WHERE ".$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;
        }
        
        function determineStatus($a_obj_id, $a_user_id, $a_obj = null)
        {
                global $ilObjDataCache, $ilDB;
        
                // the status completed depends on:
                // $status_info['num_objectives'] (ilLPStatusWrapper::_getStatusInfo($a_obj_id);)
                // - ilCourseObjective::_getObjectiveIds($a_obj_id);
                // - table crs_objectives manipulated in
                // - ilCourseObjective
                
                // $status_info['objective_result']  (ilLPStatusWrapper::_getStatusInfo($a_obj_id);)
                // table crs_objective_status (must not contain a dataset)
                // ilCourseObjectiveResult -> added ilLPStatusWrapper::_updateStatus()
        
                $status = LP_STATUS_NOT_ATTEMPTED_NUM;
                switch ($ilObjDataCache->lookupType($a_obj_id))
                {
                        case "crs":
                                include_once("./Services/Tracking/classes/class.ilChangeEvent.php");
                                if (ilChangeEvent::hasAccessed($a_obj_id, $a_user_id))
                                {
                                        $status = LP_STATUS_IN_PROGRESS_NUM;

                                        include_once 'Modules/Course/classes/class.ilCourseObjective.php';
                                        $objectives = ilCourseObjective::_getObjectiveIds($a_obj_id);
                                        if ($objectives)
                                        {
                                                $set = $ilDB->query("SELECT count(objective_id) cnt FROM crs_objective_status ".
                                                        "WHERE ".$ilDB->in('objective_id',$objectives, false,'integer').
                                                        " AND user_id = ".$ilDB->quote($a_user_id, "integer"));
                                                if ($rec = $ilDB->fetchAssoc($set))
                                                {
                                                        if ($rec["cnt"] == count($objectives))
                                                        {
                                                                $status = LP_STATUS_COMPLETED_NUM;
                                                        }
                                                }
                                        }
                                }
                                break;                  
                }
                return $status;
        }

}
                

?>