<?php

class SurveyAnswerRDFWriter
{
    protected $userUID;
    protected $filePath;

    public function __construct($surveyUID,$sessionID,$userID)
    {
        // Create empty MemModel
        $factory = new ModelFactory();
        $this->model = $factory->getDefaultModel();
        
        $this->filePath = 'data/sessions/' .  $sessionID . '/survey_'.$surveyUID . '/';
        $this->userID = $userID;
        
        if (!is_dir($this->filePath))
            mkdir($this->filePath);		
    }

    public function saveSurvey()
    {		
        $this->model->saveAs($this->filePath.'/answer_'.$this->userUID.'.rdf','rdf');
    }

    public function setRespondentData($name)
    {				
        $resourceUser = new Resource(USER . '/' . $this->userID);		

        $resourceUserType = new Resource(USER);
        $predicateRType = new Resource(RTYPE);
        $this->model->add(new Statement($resourceUser,$predicateRType,$resourceUserType));

        $LiteralUserName = new Literal($name);
        $predicateName = new Resource(NAME);
        $this->model->add(new Statement($resourceUser,$predicateUniqueID,$LiteralUserName));		

        $literalUserID = new Literal($this->userUID);
        $predicateUniqueID = new Resource(UID);
        $this->model->add(new Statement($resourceUser,$predicateUniqueID,$literalUserID));

        $predicateRespondent = new Resource(REPONDENT);
        $this->model->add(new Statement($this->resourceSurvey,$predicateRespondent,$resourceUser));
    }

    public function setAnswers($answers)
    {
        foreach($answers as $questionID => $answerValue)
        {					
            $resourceQuestion = new Resource(QUESTION.'/'.$questionID);

            $predicateAnswered = new Resource(ANSWERED);	
            $answer = new Literal($answerValue);
            $this->model->add(new Statement($resourceQuestion,$predicateAnswered,$answer));
        }
    }
}

?>