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
{
    public function __construct($a_obj_id)
    {
        global $ilDB;

        parent::__construct($a_obj_id);
        $this->db = $ilDB;
    }
    
    public static 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;
    }

    public static 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();
    }

    public static 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();
    }
    
    public static 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();
    }
    
    public static 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(ilDBConstants::FETCHMODE_OBJECT)) {
                $status_info['objective_title'][$row->objective_id] = $row->title;
                $status_info['objective_description'][$row->objective_id] = $row->description;
            }
        }
        
        return $status_info;
    }
    
    public 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);
    }
}