class.ilTestQuestionRelatedObjectivesList.php

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


class ilTestQuestionRelatedObjectivesList
{
        protected $objectivesByQuestion;

        protected $objectivesTitles;
        
        public function __construct()
        {
                $this->objectivesByQuestion = array();
                $this->objectivesTitles = array();
        }

        public function addQuestionRelatedObjectives($questionId, $objectiveIds)
        {
                $this->objectivesByQuestion[$questionId] = $objectiveIds;
        }

        public function hasQuestionRelatedObjectives($questionId)
        {
                if( !isset($this->objectivesByQuestion[$questionId]) )
                {
                        return false;
                }
                
                return (bool)count($this->objectivesByQuestion[$questionId]);
        }

        public function getQuestionRelatedObjectives($questionId)
        {
                return $this->objectivesByQuestion[$questionId];
        }
        
        public function loadObjectivesTitles()
        {
                require_once 'Modules/Course/classes/class.ilCourseObjective.php';
                
                foreach( $this->objectivesByQuestion as $objectiveIds )
                {
                        foreach( $objectiveIds as $objectiveId )
                        {
                                if( !isset($this->objectivesTitles[$objectiveId]) )
                                {
                                        $objectiveTitle = ilCourseObjective::lookupObjectiveTitle($objectiveId);
                                        $this->objectivesTitles[$objectiveId] = $objectiveTitle;
                                }
                        }
                }
        }

        public function getQuestionRelatedObjectiveTitles($questionId)
        {
                $titles = array();
                
                foreach((array) $this->objectivesByQuestion[$questionId] as $objectiveId)
                {
                        $titles[] = $this->objectivesTitles[$objectiveId];
                }
                
                return implode(', ', $titles);
        }
        
        public function getUniqueObjectivesString()
        {
                return implode(', ', $this->objectivesTitles);
        }

        public function getUniqueObjectivesStringForQuestions($questionIds)
        {
                $objectiveTitles = array();

                foreach( $this->objectivesByQuestion as $questionId => $objectiveIds )
                {
                        if( !in_array($questionId, $questionIds) )
                        {
                                continue;
                        }
                        
                        foreach( $objectiveIds as $objectiveId )
                        {
                                $objectiveTitles[$objectiveId] = $this->objectivesTitles[$objectiveId];
                        }
                }
                
                return implode(', ', $objectiveTitles);
        }

        public function getObjectiveTitleById($objectiveId)
        {
                return $this->objectivesTitles[$objectiveId];
        }

        public function getObjectives()
        {
                return $this->objectivesTitles;
        }

        public function isQuestionRelatedToObjective($questionId, $objectiveId)
        {
                foreach($this->objectivesByQuestion[$questionId] as $relatedObjectiveId)
                {
                        if($relatedObjectiveId == $objectiveId)
                        {
                                return true;
                        }
                }

                return false;
        }

        public function filterResultsByObjective($testResults, $objectiveId)
        {
                $filteredResults = array();

                foreach($testResults as $questionId => $resultData)
                {
                        if( !$this->isQuestionRelatedToObjective($questionId, $objectiveId) )
                        {
                                continue;
                        }

                        $filteredResults[$questionId] = $resultData;
                }

                return $filteredResults;
        }
}