class.ilCourseObjectiveResult.php

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<?php

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

define('IL_OBJECTIVE_STATUS_EMPTY', 'empty');
define('IL_OBJECTIVE_STATUS_PRETEST', 'pretest');
define('IL_OBJECTIVE_STATUS_FINAL', 'final');
define('IL_OBJECTIVE_STATUS_NONE', 'none');
define('IL_OBJECTIVE_STATUS_FINISHED', 'finished');
define('IL_OBJECTIVE_STATUS_PRETEST_NON_SUGGEST', 'pretest_non_suggest');

class ilCourseObjectiveResult
{
    public $db = null;
    public $user_id = null;

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

        $this->db = $ilDB;

        $this->user_id = $a_usr_id;
    }
    public function getUserId()
    {
        return $this->user_id;
    }

    public function getAccomplished($a_crs_id)
    {
        return ilCourseObjectiveResult::_getAccomplished($this->getUserId(), $a_crs_id);
    }
    public static function _getAccomplished($a_user_id, $a_crs_id)
    {
        global $ilDB;

        include_once 'Modules/Course/classes/class.ilCourseObjective.php';
        // begin-patch lok
        $objectives = ilCourseObjective::_getObjectiveIds($a_crs_id, true);
        // end-patch lok

        if (!is_array($objectives)) {
            return array();
        }
        $query = "SELECT objective_id FROM crs_objective_status " .
            "WHERE " . $ilDB->in('objective_id', $objectives, false, 'integer') . ' ' .
            "AND user_id = " . $ilDB->quote($a_user_id, 'integer') . " ";
        $res = $ilDB->query($query);
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $accomplished[] = $row->objective_id;
        }
        return $accomplished ? $accomplished : array();
    }

    public function getSuggested($a_crs_id, $a_status = IL_OBJECTIVE_STATUS_FINAL)
    {
        return ilCourseObjectiveResult::_getSuggested($this->getUserId(), $a_crs_id, $a_status);
    }
    
    public static function _getSuggested($a_user_id, $a_crs_id, $a_status = IL_OBJECTIVE_STATUS_FINAL)
    {
        global $ilDB;

        include_once './Modules/Course/classes/class.ilCourseObjective.php';
        // begin-patch lok
        $objectives = ilCourseObjective::_getObjectiveIds($a_crs_id, true);
        // end-patch lok

        $finished = array();
        if ($a_status == IL_OBJECTIVE_STATUS_FINAL or
           $a_status == IL_OBJECTIVE_STATUS_FINISHED) {
            // check finished
            $query = "SELECT objective_id FROM crs_objective_status " .
                "WHERE " . $ilDB->in('objective_id', $objectives, false, 'integer') . " " .
                "AND user_id = " . $ilDB->quote($a_user_id, 'integer') . " ";
            $res = $ilDB->query($query);
            while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
                $finished[] = $row->objective_id;
            }
        } else {
            // Pretest
            $query = "SELECT objective_id FROM crs_objective_status_p " .
                "WHERE " . $ilDB->in('objective_id', $objectives, false, 'integer') . ' ' .
                "AND user_id = " . $ilDB->quote($a_user_id, 'integer');
            $res = $ilDB->query($query);
            while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
                $finished[] = $row->objective_id;
            }
        }
        foreach ($objectives as $objective_id) {
            if (!in_array($objective_id, $finished)) {
                $suggested[] = $objective_id;
            }
        }
        return $suggested ? $suggested : array();
    }
    
    public static function getSuggestedQuestions($a_usr_id, $a_crs_id)
    {
        foreach (self::_getSuggested($a_usr_id, $a_crs_id) as $objective_id) {
            include_once './Modules/Course/classes/class.ilCourseObjectiveQuestion.php';
            $obj = new ilCourseObjectiveQuestion($objective_id);
            foreach ($obj->getFinalTestQuestions() as $qst) {
                $qsts[] = $qst['question_id'];
            }
        }
        return $qsts ? $qsts : array();
    }

    protected function resetTestForUser(ilObjTest $a_test, $a_user_id)
    {
        // this is done in ilTestLP (see below)
        // $a_test->removeTestResultsForUser($a_user_id);
                    
        // #15038
        include_once "Modules/Test/classes/class.ilTestLP.php";
        $test_lp = ilTestLP::getInstance($a_test->getId());
        $test_lp->resetLPDataForUserIds(array($a_user_id));
        
        // #15205 - see ilObjTestGUI::confirmDeleteSelectedUserDataObject()
        $active_id = $a_test->getActiveIdOfUser($a_user_id);
        if ($active_id) {
            $a_test->removeTestActives(array($active_id));
        }
    }

    public function reset($a_course_id)
    {
        global $ilDB;
        
        include_once './Modules/Course/classes/class.ilCourseObjective.php';
        include_once './Modules/Course/classes/class.ilCourseObjectiveQuestion.php';
        
        include_once './Services/Object/classes/class.ilObjectFactory.php';
        $factory = new ilObjectFactory();
        
        include_once './Modules/Course/classes/Objectives/class.ilLOTestAssignments.php';
        include_once './Modules/Course/classes/Objectives/class.ilLOSettings.php';
        $assignments = ilLOTestAssignments::getInstance($a_course_id);
        foreach (array_merge(
            $assignments->getAssignmentsByType(ilLOSettings::TYPE_TEST_INITIAL),
            $assignments->getAssignmentsByType(ilLOSettings::TYPE_TEST_QUALIFIED)
        )
                as $assignment) {
            $tst = $factory->getInstanceByRefId($assignment->getTestRefId(), false);
            if ($tst instanceof ilObjTest) {
                global $lng;
                
                require_once 'Modules/Test/classes/class.ilTestParticipantData.php';
                $participantData = new ilTestParticipantData($ilDB, $lng);
                $participantData->setUserIds(array($this->getUserId()));
                $participantData->load($tst->getTestId());
                $tst->removeTestResults($participantData);
            }
        }

        $initial = ilLOSettings::getInstanceByObjId($a_course_id)->getInitialTest();
        $initial_tst = $factory->getInstanceByRefId($initial, false);
        if ($initial_tst instanceof ilObjTest) {
            $this->resetTestForUser($initial_tst, $this->getUserId());
        }
        
        $qualified = ilLOSettings::getInstanceByObjId($a_course_id)->getQualifiedTest();
        $qualified_tst = $factory->getInstanceByRefId($qualified, false);
        if ($qualified_tst instanceof ilObjTest) {
            $this->resetTestForUser($qualified_tst, $this->getUserId());
        }
        
        $objectives = ilCourseObjective::_getObjectiveIds($a_course_id, false);

        if (count($objectives)) {
            $query = "DELETE FROM crs_objective_status " .
                "WHERE " . $ilDB->in('objective_id', $objectives, false, 'integer') . ' ' .
                "AND user_id = " . $ilDB->quote($this->getUserId(), 'integer') . " ";
            $res = $ilDB->manipulate($query);

            $query = "DELETE FROM crs_objective_status_p " .
                "WHERE " . $ilDB->in('objective_id', $objectives, false, 'integer') . ' ' .
                "AND user_id = " . $ilDB->quote($this->getUserId()) . "";
            $res = $ilDB->manipulate($query);
            
            $query = "DELETE FROM loc_user_results " .
                "WHERE " . $ilDB->in('objective_id', $objectives, false, 'integer') . ' ' .
                "AND user_id = " . $ilDB->quote($this->getUserId()) . "";
        }
    
        // update/reset LP for course
        include_once './Services/Tracking/classes/class.ilLPStatusWrapper.php';
        ilLPStatusWrapper::_updateStatus($a_course_id, $this->getUserId());
        
        return true;
    }

    public function getStatus($a_course_id)
    {
        include_once './Modules/TestQuestionPool/classes/class.assQuestion.php';
        include_once 'Modules/Course/classes/class.ilCourseObjective.php';
        // begin-patch lok
        $objective_ids = ilCourseObjective::_getObjectiveIds($a_course_id, true);
        // end-patch lok
        $objectives = ilCourseObjectiveResult::_readAssignedObjectives($objective_ids);
        $accomplished = $this->getAccomplished($a_course_id);
        $suggested = $this->getSuggested($a_course_id);

        if (!count($objective_ids)) {
            return IL_OBJECTIVE_STATUS_EMPTY;
        }

        if (count($accomplished) == count($objective_ids)) {
            return IL_OBJECTIVE_STATUS_FINISHED;
        }

        $all_pretest_answered = false;
        $all_final_answered = false;
        foreach ($objectives as $data) {
            if (assQuestion::_areAnswered($this->getUserId(), $data['questions'])) {
                if ($data['tst_status']) {
                    $all_final_answered = true;
                } else {
                    $all_pretest_answered = true;
                }
            }
        }
        if ($all_final_answered) {
            return IL_OBJECTIVE_STATUS_FINAL;
        }
        if ($all_pretest_answered and
           !count($suggested)) {
            return IL_OBJECTIVE_STATUS_PRETEST_NON_SUGGEST;
        } elseif ($all_pretest_answered) {
            return IL_OBJECTIVE_STATUS_PRETEST;
        }
        return IL_OBJECTIVE_STATUS_NONE;
    }

    public function hasAccomplishedObjective($a_objective_id)
    {
        global $ilDB;
        
        $query = "SELECT status FROM crs_objective_status " .
            "WHERE objective_id = " . $ilDB->quote($a_objective_id, 'integer') . " " .
            "AND user_id = " . $ilDB->quote($this->getUserId(), 'integer') . "";

        $res = $this->db->query($query);
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            return true;
        }
        return false;
    }

    public function readStatus($a_crs_id)
    {
        include_once './Modules/Course/classes/class.ilCourseObjective.php';

        // begin-patch lok
        $objective_ids = ilCourseObjective::_getObjectiveIds($a_crs_id, true);
        // end-patch lok
        $objectives = ilCourseObjectiveResult::_readAssignedObjectives($objective_ids);
        ilCourseObjectiveResult::_updateObjectiveStatus($this->getUserId(), $objectives);
        return true;
    }
    



    // PRIVATE
    public function __deleteEntries($a_objective_ids)
    {
        global $ilLog;
        
        $ilLog->logStack();
        #$ilLog(__METHOD__.': Call of deprecated method.');
        
        return true;
    }

    public static function _deleteUser($user_id)
    {
        global $ilDB;

        $query = "DELETE FROM crs_objective_status " .
            "WHERE user_id = " . $ilDB->quote($user_id, 'integer') . " ";
        $res = $ilDB->manipulate($query);

        $query = "DELETE FROM crs_objective_status_p " .
            "WHERE user_id = " . $ilDB->quote($user_id, 'integer') . " ";
        $res = $ilDB->manipulate($query);
        return true;
    }

    public static function _updateObjectiveResult($a_user_id, $a_active_id, $a_question_id)
    {
        // find all objectives this question is assigned to
        if (!$objectives = self::_readAssignedObjectivesOfQuestion($a_question_id)) {
            // no objectives found. TODO user has passed a test. After that questions of that test are assigned to an objective.
            // => User has not passed
            return true;
        }
        self::_updateObjectiveStatus($a_user_id, $objectives);
        
        return true;
    }

    public static function _readAssignedObjectivesOfQuestion($a_question_id)
    {
        global $ilDB;

        // get all objtives and questions this current question is assigned to
        $query = "SELECT q2.question_id qid,q2.objective_id ob FROM crs_objective_qst q1, " .
            "crs_objective_qst q2 " .
            "WHERE q1.question_id = " . $ilDB->quote($a_question_id, 'integer') . " " .
            "AND q1.objective_id = q2.objective_id ";

        $res = $ilDB->query($query);
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $objectives['all_objectives'][$row->ob] = $row->ob;
            $objectives['all_questions'][$row->qid] = $row->qid;
        }
        if (!is_array($objectives)) {
            return false;
        }
        $objectives['objectives'] = self::_readAssignedObjectives($objectives['all_objectives']);
        return $objectives ? $objectives : array();
    }


    public static function _readAssignedObjectives($a_all_objectives)
    {
        global $ilDB;

        // Read necessary points
        $query = "SELECT t.objective_id obj,t.ref_id ref, question_id,tst_status,tst_limit " .
            "FROM crs_objective_tst t JOIN crs_objective_qst q " .
            "ON (t.objective_id = q.objective_id AND t.ref_id = q.ref_id) " .
            "WHERE " . $ilDB->in('t.objective_id', $a_all_objectives, false, 'integer');

        $res = $ilDB->query($query);
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            /*
            $objectives[$row->obj."_".$row->ref]['questions'][$row->question_id] = $row->question_id;
            $objectives[$row->obj."_".$row->ref]['tst_status'] = $row->tst_status;
            $objectives[$row->obj."_".$row->ref]['tst_limit'] = $row->tst_limit;
            $objectives[$row->obj."_".$row->ref]['objective_id'] = $row->obj;
            */
            
            $objectives[$row->obj . "_" . $row->tst_status]['questions'][$row->question_id] = $row->question_id;
            $objectives[$row->obj . "_" . $row->tst_status]['tst_status'] = $row->tst_status;
            $objectives[$row->obj . "_" . $row->tst_status]['tst_limit'] = $row->tst_limit;
            $objectives[$row->obj . "_" . $row->tst_status]['objective_id'] = $row->obj;
        }
        return $objectives ? $objectives : array();
    }

    public static function _updateObjectiveStatus($a_user_id, $objectives)
    {
        global $ilDB,$ilUser;

        if (!count($objectives['all_questions']) or
           !count($objectives['all_objectives'])) {
            return false;
        }
        // Read reachable points
        $query = "SELECT question_id,points FROM qpl_questions " .
            "WHERE " . $ilDB->in('question_id', (array) $objectives['all_questions'], false, 'integer');
        $res = $ilDB->query($query);
        while ($row = $ilDB->fetchAssoc($res)) {
            $objectives['all_question_points'][$row['question_id']]['max_points'] = $row['points'];
        }
        // Read reached points
        $query = "SELECT question_fi, MAX(points) as reached FROM tst_test_result " .
            "JOIN tst_active ON (active_id = active_fi) " .
            "WHERE user_fi = " . $ilDB->quote($a_user_id, 'integer') . " " .
            "AND " . $ilDB->in('question_fi', (array) $objectives['all_questions'], false, 'integer') . " " .
            #"AND question_fi IN (".implode(",",ilUtil::quoteArray($objectives['all_questions'])).") ".
            "GROUP BY question_fi,user_fi";
        $res = $ilDB->query($query);
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $objectives['all_question_points'][$row->question_fi]['reached_points'] = $row->reached;
        }
        
        // Check accomplished
        $fullfilled = array();
        $pretest = array();
        foreach ($objectives['objectives'] as $kind => $data) {
            // objective does not allow to change status
            if (ilCourseObjectiveResult::__isFullfilled($objectives['all_question_points'], $data)) {
                // Status 0 means pretest fullfilled, status 1 means final test fullfilled
                if ($data['tst_status']) {
                    $fullfilled[] = array($data['objective_id'],$ilUser->getId(),$data['tst_status']);
                } else {
                    $pretest[] = array($data['objective_id'],$ilUser->getId());
                }
            }
        }
        if (count($fullfilled)) {
            foreach ($fullfilled as $fullfilled_arr) {
                $ilDB->replace(
                    'crs_objective_status',
                    array(
                        'objective_id' => array('integer',$fullfilled_arr[0]),
                        'user_id' => array('integer',$fullfilled_arr[1])
                    ),
                    array(
                        'status' => array('integer',$fullfilled_arr[2])
                    )
                );
            }
            ilCourseObjectiveResult::__updatePassed($a_user_id, $objectives['all_objectives']);
        }
        if (count($pretest)) {
            foreach ($pretest as $pretest_arr) {
                $ilDB->replace(
                    'crs_objective_status_p',
                    array(
                        'objective_id' => array('integer',$pretest_arr[0]),
                        'user_id' => array('integer',$pretest_arr[1])
                    ),
                    array()
                );
            }
        }
        return true;
    }

    public static function __isFullfilled($question_points, $objective_data)
    {
        if (!is_array($objective_data['questions'])) {
            return false;
        }
        $max_points = 0;
        $reached_points = 0;
        foreach ($objective_data['questions'] as $question_id) {
            $max_points += $question_points[$question_id]['max_points'];
            $reached_points += $question_points[$question_id]['reached_points'];
        }
        if (!$max_points) {
            return false;
        }
            
        return $reached_points >= $objective_data['tst_limit'] ? true : false;
        
        return (($reached_points / $max_points * 100) >= $objective_data['tst_limit']) ? true : false;
    }

    public static function __updatePassed($a_user_id, $objective_ids)
    {
        global $ilDB;

        $passed = array();
        
        $query = "SELECT COUNT(t1.crs_id) num,t1.crs_id FROM crs_objectives t1 " .
            "JOIN crs_objectives t2 WHERE t1.crs_id = t2.crs_id and  " .
            $ilDB->in('t1.objective_id', $objective_ids, false, 'integer') . " " .
            "GROUP BY t1.crs_id";
        $res = $ilDB->query($query);
        $crs_ids = array();
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $query = "SELECT COUNT(cs.objective_id) num_passed FROM crs_objective_status cs " .
                "JOIN crs_objectives co ON cs.objective_id = co.objective_id " .
                "WHERE crs_id = " . $ilDB->quote($row->crs_id, 'integer') . " " .
                "AND user_id = " . $ilDB->quote($a_user_id, 'integer') . " ";

            $user_res = $ilDB->query($query);
            while ($user_row = $user_res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
                if ($user_row->num_passed == $row->num) {
                    $passed[] = $row->crs_id;
                }
            }
            $crs_ids[$row->crs_id] = $row->crs_id;
        }
        if (count($passed)) {
            foreach ($passed as $crs_id) {
                include_once('Modules/Course/classes/class.ilCourseParticipants.php');
                $members = ilCourseParticipants::_getInstanceByObjId($crs_id);
                $members->updatePassed($a_user_id, true);
            }
        }
        
        // update tracking status
        foreach ($crs_ids as $cid) {
            include_once("./Services/Tracking/classes/class.ilLPStatusWrapper.php");
            ilLPStatusWrapper::_updateStatus($cid, $a_user_id);
        }
    }
}