class.ilTestSkillEvaluation.php

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<?php
/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */

require_once 'Modules/Test/classes/class.ilTestSkillQuestionAssignmentList.php';
require_once 'Modules/Test/classes/class.ilTestSkillLevelThresholdList.php';
require_once 'Services/Skill/classes/class.ilBasicSkill.php';

class ilTestSkillEvaluation
{
        private $db;

        private $testOBJ;

        private $skillQuestionAssignmentList;

        private $skillLevelThresholdList;

        private $questions;

        private $maxPointsByQuestion;

        private $reachedPointsByQuestion;

        private $skillPointAccounts;

        private $reachedSkillLevels;

        public function __construct(ilDB $db, ilObjTest $testOBJ)
        {
                $this->db = $db;
                $this->testOBJ = $testOBJ;

                $this->skillQuestionAssignmentList = new ilTestSkillQuestionAssignmentList($this->db);
                $this->skillQuestionAssignmentList->setTestId($this->testOBJ->getTestId());

                $this->skillLevelThresholdList = new ilTestSkillLevelThresholdList($this->db);
                $this->skillLevelThresholdList->setTestId($this->testOBJ->getTestId());

                $this->questions = array();
                $this->maxPointsByQuestion = array();
        }

        public function init()
        {
                $this->skillQuestionAssignmentList->loadFromDb();
                $this->skillLevelThresholdList->loadFromDb();

                $this->initTestQuestionData();

                return $this;
        }

        public function evaluate($activeId, $pass, $userId)
        {
                $this->reset();

                $this->initTestResultData($activeId, $pass);

                $this->drawUpSkillPointAccounts();
                $this->evaluateSkillPointAccounts($userId);
        }

        public function trigger($activeId, $pass, $userId)
        {
                $this->evaluate($activeId, $pass, $userId);

                $this->triggerSkillService();
        }

        public function getReachedSkillLevels()
        {
                return $this->reachedSkillLevels;
        }

        private function reset()
        {
                $this->reachedPointsByQuestion = array();
                $this->skillPointAccounts = array();
                $this->reachedSkillLevels = array();
        }

        private function initTestQuestionData()
        {
                foreach($this->testOBJ->getTestQuestions() as $question)
                {
                        $this->questions[] = $question['question_id'];

                        $this->maxPointsByQuestion[ $question['question_id'] ] = $question['points'];
                }
        }

        private function initTestResultData($activeId, $pass)
        {
                $testResults = $this->testOBJ->getTestResult($activeId, $pass, true);
                foreach($testResults as $key => $result)
                {
                        if($key === 'pass' || $key === 'test') // note: key int 0 IS == 'pass' or 'buxtehude'
                        {
                                continue;
                        }

                        $this->reachedPointsByQuestion[ $result['qid'] ] = $result['reached'];
                }
        }

        private function drawUpSkillPointAccounts()
        {
                foreach($this->questions as $questionId)
                {
                        $maxTestPoints = $this->maxPointsByQuestion[$questionId];
                        $reachedTestPoints = $this->reachedPointsByQuestion[$questionId];

                        $assignments = $this->skillQuestionAssignmentList->getAssignmentsByQuestionId($questionId);

                        foreach($assignments as $assignment)
                        {
                                $reachedSkillPoints = $this->calculateReachedSkillPoints(
                                        $assignment->getSkillPoints(), $maxTestPoints, $reachedTestPoints
                                );

                                $this->bookToSkillPointAccount(
                                        $assignment->getSkillBaseId(), $assignment->getSkillTrefId(), $reachedSkillPoints
                                );
                        }
                }
        }

        private function calculateReachedSkillPoints($skillPoints, $maxTestPoints, $reachedTestPoints)
        {
                if( $reachedTestPoints < 0 )
                {
                        $reachedTestPoints = 0;
                }

                $factor = 0;

                if( $maxTestPoints > 0 )
                {
                        $factor = $reachedTestPoints / $maxTestPoints;
                }

                return ($skillPoints * $factor);
        }

        private function bookToSkillPointAccount($skillBaseId, $skillTrefId, $reachedSkillPoints)
        {
                $skillKey = $skillBaseId.':'.$skillTrefId;

                if( !isset($this->skillPointAccounts[$skillKey]) )
                {
                        $this->skillPointAccounts[$skillKey] = 0;
                }

                $this->skillPointAccounts[$skillKey] += $reachedSkillPoints;
        }

        private function evaluateSkillPointAccounts($userId)
        {
                foreach($this->skillPointAccounts as $skillKey => $skillPoints)
                {
                        list($skillBaseId, $skillTrefId) = explode(':', $skillKey);

                        $skill = new ilBasicSkill($skillBaseId);
                        $levels = $skill->getLevelData();

                        $reachedLevelId = null;

                        foreach($levels as $level)
                        {
                                $threshold = $this->skillLevelThresholdList->getThreshold($skillBaseId, $skillTrefId, $level['id']);

                                if( !($threshold instanceof ilTestSkillLevelThreshold) || !$threshold->getThreshold() )
                                {
                                        continue;
                                }

                                $reachedLevelId = $level['id'];

                                if( $skillPoints <= $threshold->getThreshold() )
                                {
                                        break;
                                }
                        }

                        if( $reachedLevelId )
                        {
                                $this->reachedSkillLevels[] = array(
                                        'usrId' => $userId, 'sklBaseId' => $skillBaseId,
                                        'sklTrefId' => $skillTrefId, 'sklLevelId' => $reachedLevelId
                                );
                        }
                }
        }

        private function triggerSkillService()
        {
                foreach($this->getReachedSkillLevels() as $reachedSkillLevel)
                {
                        $this->invokeSkillLevelTrigger(
                                $reachedSkillLevel['usrId'], $reachedSkillLevel['sklBaseId'],
                                $reachedSkillLevel['sklTrefId'], $reachedSkillLevel['sklLevelId']
                        );
                }
        }

        private function invokeSkillLevelTrigger($userId, $skillBaseId, $skillTrefId, $skillLevelId)
        {
                ilBasicSkill::writeUserSkillLevelStatus(
                        $skillLevelId, $userId, $this->testOBJ->getRefId(), $skillTrefId, ilBasicSkill::ACHIEVED, true
                );

                //mail('bheyser@databay.de', "trigger skill $skillBaseId:$skillTrefId level $skillLevelId for user $userId", '');
        }

        public function getReachedSkillLevelsForPersonalSkillGUI()
        {
                $reachedLevels = array();

                foreach($this->getReachedSkillLevels() as $reachedLevel)
                {
                        $reachedLevels[$reachedLevel['sklBaseId']] = array(
                                $reachedLevel['sklTrefId'] => $reachedLevel['sklLevelId']
                        );
                }

                return $reachedLevels;
        }

        public function getUniqueAssignedSkillsForPersonalSkillGUI()
        {
                $uniqueSkills = array();

                foreach($this->skillQuestionAssignmentList->getUniqueAssignedSkills() as $skill)
                {
                        $uniqueSkills[] = array(
                                'base_skill_id' => (int)$skill['skill_base_id'],
                                'tref_id' => (int)$skill['skill_tref_id']
                        );
                }

                return $uniqueSkills;
        }

        public function isAssignedSkill($skillBaseId, $skillTrefId)
        {
                $this->skillQuestionAssignmentList->isAssignedSkill($skillBaseId, $skillTrefId);
        }

        public function getAssignedSkillMatchingSkillProfiles($usrId)
        {
                $matchingSkillProfiles = array();

                include_once("./Services/Skill/classes/class.ilSkillProfile.php");
                $usersProfiles = ilSkillProfile::getProfilesOfUser($usrId);

                foreach ($usersProfiles as $profileData)
                {
                        $profile = new ilSkillProfile($profileData['id']);
                        $assignedSkillLevels = $profile->getSkillLevels();

                        foreach($assignedSkillLevels as $assignedSkillLevel)
                        {
                                $skillBaseId = $assignedSkillLevel['base_skill_id'];
                                $skillTrefId = $assignedSkillLevel['tref_id'];

                                if( $this->skillQuestionAssignmentList->isAssignedSkill($skillBaseId, $skillTrefId) )
                                {
                                        $matchingSkillProfiles[$profileData['id']] = $profile->getTitle();
                                }
                        }
                }

                return $matchingSkillProfiles;
        }

        public function noProfileMatchingAssignedSkillExists($usrId, $availableSkillProfiles)
        {
                $noProfileMatchingSkills = $this->skillQuestionAssignmentList->getUniqueAssignedSkills();

                foreach($availableSkillProfiles as $skillProfileId => $skillProfileTitle)
                {
                        $profile = new ilSkillProfile($skillProfileId);
                        $assignedSkillLevels = $profile->getSkillLevels();

                        foreach($assignedSkillLevels as $assignedSkillLevel)
                        {
                                $skillBaseId = $assignedSkillLevel['base_skill_id'];
                                $skillTrefId = $assignedSkillLevel['tref_id'];

                                if( $this->skillQuestionAssignmentList->isAssignedSkill($skillBaseId, $skillTrefId) )
                                {
                                        unset($noProfileMatchingSkills["{$skillBaseId}:{$skillTrefId}"]);
                                }
                        }
                }

                return count($noProfileMatchingSkills);
        }
}