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)
        {
                $users = array();
                
                $members = self::getMembers($a_obj_id);
                if($members)
                {
                        // diff in progress, completed and failed (use stored result in LPStatusWrapper)
                        $users = array_diff((array) $members, ilLPStatusWrapper::_getInProgress($a_obj_id));
                        $users = array_diff((array) $members, ilLPStatusWrapper::_getCompleted($a_obj_id));
                        $users = array_diff((array) $members, ilLPStatusWrapper::_getFailed($a_obj_id));
                }

                return $users;
        }

        function _getInProgress($a_obj_id)
        {               
                $objective_results = ilLPStatusWrapper::_getStatusInfo($a_obj_id);
                $usr_ids = (array)$objective_results['user_status'][self::LP_STATUS_IN_PROGRESS_NUM];
                
                /* change_event is of no use when no objective has been tried yet
                include_once './Services/Tracking/classes/class.ilChangeEvent.php';
                $users = ilChangeEvent::lookupUsersInProgress($a_obj_id);
                
                // Exclude all users with status completed/failed.
                $users = array_diff((array) $users,ilLPStatusWrapper::_getCompleted($a_obj_id));
                $users = array_diff((array) $users,ilLPStatusWrapper::_getFailed($a_obj_id));
                */
                
                if($usr_ids)
                {
                        // Exclude all non members
                        $usr_ids = array_intersect(self::getMembers($a_obj_id), (array)$usr_ids);
                }
                
                return $usr_ids ? $usr_ids : array();
        }

        function _getCompleted($a_obj_id)
        {                                               
                $objective_results = ilLPStatusWrapper::_getStatusInfo($a_obj_id);
                $usr_ids = (array)$objective_results['user_status'][self::LP_STATUS_COMPLETED_NUM];
                                
                if($usr_ids)
                {
                        // Exclude all non members
                        $usr_ids = array_intersect(self::getMembers($a_obj_id), (array)$usr_ids);
                }
                
                return $usr_ids ? $usr_ids : array();
        }
        
        function _getFailed($a_obj_id)
        {       
                $objective_results = ilLPStatusWrapper::_getStatusInfo($a_obj_id);
                $usr_ids = (array)$objective_results['user_status'][self::LP_STATUS_FAILED_NUM];                
                
                if($usr_ids)
                {
                        // Exclude all non members
                        $usr_ids = array_intersect(self::getMembers($a_obj_id), (array)$usr_ids);
                }
                
                return $usr_ids ? $usr_ids : array();           
        }               
        
        function _getStatusInfo($a_obj_id)
        {
                global $ilDB;

                include_once 'Modules/Course/classes/class.ilCourseObjective.php';

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

                if($status_info['num_objectives'])
                {                       
                        $in = $ilDB->in('objective_id',$status_info['objectives'],false,'integer');
                                                
                        include_once "Modules/Course/classes/Objectives/class.ilLOUserResults.php";
                        foreach(ilLOUserResults::getSummarizedObjectiveStatusForLP($a_obj_id, $status_info['objectives']) as $user_id => $user_status)
                        {
                                $status_info['user_status'][$user_status][] = $user_id;                                                 
                        }               
                        
                        // change event should lead to "in progress" - see determineStatus()
                        include_once("./Services/Tracking/classes/class.ilChangeEvent.php");
                        foreach(ilChangeEvent::lookupUsersInProgress($a_obj_id) as $user_id)
                        {
                                if(!is_array($status_info['user_status'][ilLPStatus::LP_STATUS_IN_PROGRESS_NUM]) ||
                                        !in_array($user_id, $status_info['user_status'][ilLPStatus::LP_STATUS_IN_PROGRESS_NUM]))
                                {
                                        $status_info['user_status'][ilLPStatus::LP_STATUS_IN_PROGRESS_NUM][] = $user_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()
        
                $status = self::LP_STATUS_NOT_ATTEMPTED_NUM;
                switch ($ilObjDataCache->lookupType($a_obj_id))
                {
                        case "crs":
                                include_once("./Services/Tracking/classes/class.ilChangeEvent.php");
                                if (ilChangeEvent::hasAccessed($a_obj_id, $a_user_id))
                                {
                                        // an initial test (only) should also lead to "in progress"
                                        $status = self::LP_STATUS_IN_PROGRESS_NUM;

                                        include_once 'Modules/Course/classes/class.ilCourseObjective.php';                              
                                        $objectives = ilCourseObjective::_getObjectiveIds($a_obj_id, true);                                     
                                        if ($objectives)
                                        {                                                                                               
                                                // #14051 - getSummarizedObjectiveStatusForLP() might return null
                                                include_once "Modules/Course/classes/Objectives/class.ilLOUserResults.php";                                                                                             
                                                $objtv_status = ilLOUserResults::getSummarizedObjectiveStatusForLP($a_obj_id, $objectives, $a_user_id);                                                                                                 
                                                if($objtv_status !== null)
                                                {
                                                        $status = $objtv_status;
                                                }
                                        }                                       
                                }
                                break;                  
                }
                return $status;
        }
        
        protected static function getMembers($a_obj_id)
        {                               
                include_once 'Modules/Course/classes/class.ilCourseParticipants.php';
                $member_obj = ilCourseParticipants::_getInstanceByObjId($a_obj_id);
                return $member_obj->getMembers();                                               
        }
        
        public static function _lookupCompletedForObject($a_obj_id, $a_user_ids = null)
        {
                if(!$a_user_ids)
                {
                        $a_user_ids = self::getMembers($a_obj_id);
                        if(!$a_user_ids)
                        {
                                return array();
                        }
                }
                return self::_lookupStatusForObject($a_obj_id, self::LP_STATUS_COMPLETED_NUM, $a_user_ids);
        }
        
        public static function _lookupFailedForObject($a_obj_id, $a_user_ids = null)
        {
                return array();
        }
        
        public static function _lookupInProgressForObject($a_obj_id, $a_user_ids = null)
        {
                if(!$a_user_ids)
                {
                        $a_user_ids = self::getMembers($a_obj_id);
                        if(!$a_user_ids)
                        {
                                return array();
                        }
                }
                return self::_lookupStatusForObject($a_obj_id, self::LP_STATUS_IN_PROGRESS_NUM, $a_user_ids);
        }       
}
                

?>