class.ilTestRandomQuestionSetBuilderWithAmountPerPool.php

Go to the documentation of this file.

<?php
/* Copyright (c) 1998-2013 ILIAS open source, Extended GPL, see docs/LICENSE */
 
require_once 'Modules/Test/classes/class.ilTestRandomQuestionSetBuilder.php';
 
class ilTestRandomQuestionSetBuilderWithAmountPerPool extends ilTestRandomQuestionSetBuilder
{
        public function checkBuildable()
        {
                $questionStage = $this->getQuestionStageForSourcePoolDefinitionList($this->sourcePoolDefinitionList);
 
                if( $questionStage->isSmallerThan($this->sourcePoolDefinitionList->getQuestionAmount()) )
                {
                        return false;
                }
 
                return true;
        }
 
        public function performBuild(ilTestSession $testSession)
        {
                $questionSet = new ilTestRandomQuestionSetQuestionCollection();
 
                foreach($this->sourcePoolDefinitionList as $definition)
                {
                        $requiredQuestionAmount = $definition->getQuestionAmount();
 
                        $potentialQuestionStage = $this->getQuestionStageForSourcePoolDefinition($definition);
 
                        $actualQuestionStage = $potentialQuestionStage->getRelativeComplementCollection($questionSet);
 
                        if( $actualQuestionStage->isGreaterThan($requiredQuestionAmount) )
                        {
                                $questions = $this->fetchQuestionsFromStageRandomly($actualQuestionStage, $requiredQuestionAmount);
                        }
                        else
                        {
                                $questions = $actualQuestionStage;
                        }
 
                        $questionSet->mergeQuestionCollection($questions);
                }
 
                $requiredQuestionAmount = $this->sourcePoolDefinitionList->getQuestionAmount();
 
                if( $questionSet->isSmallerThan($requiredQuestionAmount) )
                {
                        $missingQuestionCount = $questionSet->getMissingCount($requiredQuestionAmount);
                        $potentialQuestionStage = $this->getQuestionStageForSourcePoolDefinitionList($this->sourcePoolDefinitionList);
                        $actualQuestionStage = $potentialQuestionStage->getRelativeComplementCollection($questionSet);
                        $questions = $this->fetchQuestionsFromStageRandomly($actualQuestionStage, $missingQuestionCount);
 
                        $questionSet->mergeQuestionCollection($questions);
                }
 
                $this->handleQuestionOrdering($questionSet);
 
                $this->storeQuestionSet($testSession, $questionSet);
        }
}