source: Dev/trunk/classes/SurveyDatabaseInterface.php @ 82

<?php
// Survey database interface class as intermediate for storing data from the site to the RDF database 
require_once 'rdfConstants.php';

// Include RAP Library to write RDF files
include(RDFAPI_INCLUDE_DIR . "RDFAPI.php");



class SurveyDatabaseInterface
{               
    protected $surveyRDFWriter;
    protected $surveyRDFReader;


    public function __construct($surveyID)
    {
        if($surveyID == null)
            $surveyUID = md5( uniqid(rand(), true) );
        else
            $surveyUID = $surveyID;

        $this->surveyRDFWriter = new SurveyRDFWriter($surveyUID);
        $this->surveyRDFReader = new SurveyRDFReader($surveyUID);
    }

    public function setSurveyInfo($survey)
    {
        $sTitle = $survey['surveyTitle'];
        $sDescription = $survey['surveyDescription'];

        $this->surveyRDFWriter->createSurvey($sTitle,$sDescription);

        $sUserID = "Creator";

        $this->surveyRDFWriter->setUserData($sUserID);

        $qNumber = 1;
        while (isset($survey['questionTitle'.$qNumber]))
        {
            $qTitle = $survey['questionTitle'.$qNumber];
            $qDescription = $survey['questionDescription'.$qNumber];
            $qType = $survey['questionType'.$qNumber];
            if (isset($survey['questionID'.$qNumber]))
                $qID = $survey['questionID'.$qNumber];
            else
                $qID = md5( uniqid(rand(), true) );

            $qAnswers = array();
            $aNumber = 1;
            while (isset($survey['q'.$qNumber.'ans'.$aNumber]))
            {
                $aArray = array();
                $aArray['Title'] = 'q'.$qNumber.'ans'.$aNumber;
                $aArray['Description'] = $survey['q'.$qNumber.'ans'.$aNumber];
                $qAnswers[] = $aArray;

                $aNumber++;
            }

            $this->surveyRDFWriter->addQuestion($qTitle,$qDescription,$qType,$qID,$qAnswers);

            $qNumber++;
        }

        $this->surveyRDFWriter->saveSurvey();
    }

    public function getSurveyInfo()
    {
        $surveyInfo = array();

        $resultSurvey = $this->surveyRDFReader->getSurveyInfo();

        $surveyInfo['surveyID'] = substr($resultSurvey[0][0]['?uid'],9,strlen($resultSurvey[0][0]['?uid'])-11);
        $surveyInfo['surveyTitle'] = substr($resultSurvey[0][0]['?title'],9,strlen($resultSurvey[0][0]['?title'])-11);
        $surveyInfo['surveyDescription'] = substr($resultSurvey[0][0]['?description'],9,strlen($resultSurvey[0][0]['?description'])-11);
        $surveyInfo['surveyCreator'] = substr($resultSurvey[0][0]['?creator'],9,strlen($resultSurvey[0][0]['?creator'])-11);

        for($qNumber = 1;$qNumber<=sizeof($resultSurvey[1][0]);$qNumber++)
        {
            $surveyInfo['questionID'.$qNumber] = substr($resultSurvey[1][3][$qNumber-1]['?questionID'],9,strlen($resultSurvey[1][3][$qNumber-1]['?questionID'])-11);
            $surveyInfo['questionTitle'.$qNumber] = substr($resultSurvey[1][0][$qNumber-1]['?questionTitle'],9,strlen($resultSurvey[1][0][$qNumber-1]['?questionTitle'])-11);
            $surveyInfo['questionDescription'.$qNumber] = substr($resultSurvey[1][1][$qNumber-1]['?questionDescription'],9,strlen($resultSurvey[1][1][$qNumber-1]['?questionDescription'])-11);
            $surveyInfo['questionType'.$qNumber] = substr($resultSurvey[1][2][$qNumber-1]['?questionType'],9,strlen($resultSurvey[1][2][$qNumber-1]['?questionType'])-11);

            $resultAnswers = $this->surveyRDFReader->readSurveyAnswers($surveyInfo['questionID'.$qNumber]);

            if ($resultAnswers != null)
            {
                for($aNumber = 1;$aNumber<=sizeof($resultAnswers);$aNumber++)
                {
                    $surveyInfo['q'.$qNumber.'ans'.$aNumber] = substr($resultAnswers[$aNumber-1]['?answerDescription'],9,strlen($resultAnswers[$aNumber-1]['?answerDescription'])-11);
                }
            }
        }

        return $surveyInfo;
    }

    public function getExistingSurveys()
    {
        $surveyIDs = array();
        $surveys = array();

        if($handle = opendir('data/surveys/'))
        {
            while (false !== ($file = readdir($handle))) {
                if(strstr($file, 'survey_') && strstr($file, '.rdf'))
                    $surveyIDs[] = substr($file,7,strlen($file)-11);
            }
        }

        foreach($surveyIDs as $surveyID)
        {
            $surveyTitle = $this->surveyRDFReader->getSurveyTitleByID($surveyID);
            $surveys[$surveyID] = substr($surveyTitle[0]['?title'],9,strlen($surveyTitle[0]['?title'])-11);
        }

        return $surveys;
    }
    
    public function getSurveyTitleByID($surveyID)
    {
        $surveyTitleLiteral = $this->surveyRDFReader->getSurveyTitleByID($surveyID);
        $surveyTitle = substr($surveyTitle[0]['?title'],9,strlen($surveyTitle[0]['?title'])-11);
        
        return $surveyTitle;
    }

}
?>