<?php

class SessionRDFWriter 
{
    protected $model;

    protected $sessionUID;
    protected $resourceSession;
            
    protected $filePath;

    public function __construct($sessionUID)
    {
        // Create empty MemModel
        $factory = new ModelFactory();
        $this->model = $factory->getDefaultModel();

        $this->sessionUID = $sessionUID;	
        $this->filePath = 'data/sessions/';
        if (!is_dir($this->filePath))
            mkdir($this->filePath);	
    }
    
    public function saveAs()
    {
        $this->model->saveAs($this->filePath.
                'session_' . $this->surveyUID . '/.' . 
                $this->surveyUID  .'.rdf',
                'rdf');
    }
    
    public function createSession($sTitle,$sDescription)
    {
        $this->resourceSession = new Resource(SESSION.'/'.$this->sessionUID);

        $resourceSessionType = new Resource(SESSION);
        $predicateRType = new Resource(RTYPE);
        $this->model->add(new Statement($this->resourceSession,$predicateRType,$resourceSessionType));

        $literalSessionID = new Literal($this->sessionUID);
        $predicateUniqueID = new Resource(UID);
        $this->model->add(new Statement($this->resourceSession,$predicateUniqueID,$literalSessionID));

        $predicateTitle = new Resource(TITLE);		
        $sessionTitle = new Literal($sTitle);
        $this->model->add(new Statement($this->resourceSession,$predicateTitle,$sessionTitle));		

        $predicateDescription = new Resource(DESCRIPTION);
        $sessionDescription = new Literal($sDescription);
        $this->model->add(new Statement($this->resourceSession,$predicateDescription,$sessionDescription));
    }
    
    public function addSurveyToPipeline($uid,$index)
    {
        $resourceSurvey = new Resource(SURVEY);
        $predicateHasProcess = new Resource(HAS_PROCESS);
        $this->model->add(new Statement($this->resourceSession,$predicateHasProcess,$resourceSurvey));
        
        $literalSurveyID = new Literal($uid);
        $predicateUID = new Resource(UID);
        $this->model->add(new Statement($$resourceSurvey,$predicateUID,$literalSurveyID));        
        
        $literalIndex = new Literal($index);
        $predicateIndex = new Resource(INDEX);        
        $this->model->add(new Statement($resourceSurvey,$predicateIndex,$literalIndex));
    }
    
    public function addApplicationToPipeline($uid,$index)
    {
        $resourceApplication = new Resource(APPLICATION);
        $predicateHasProcess = new Resource(HAS_PROCESS);
        $this->model->add(new Statement($this->resourceSession,$predicateHasProcess,$resourceApplication));
        
        $literalApplicationID = new Literal($uid,$index);
        $predicateUID = new Resource(UID);
        $this->model->add(new Statement($resourceApplication,$predicateUID,$literalApplicationID));        
        
        $literalIndex = new Literal($index);
        $predicateIndex = new Resource(INDEX);        
        $this->model->add(new Statement($resourceApplication,$predicateIndex,$literalIndex));
    }
    
    public function addDashboardToPipeline($uid,$index)
    {
        $resourceDashboard = new Resource(DASHBOARD);
        $predicateHasProcess = new Resource(HAS_PROCESS);
        $this->model->add(new Statement($this->resourceSession,$predicateHasProcess,$resourceDashboard));
        
        $literalDashboardID = new Literal($uid);
        $predicateUID = new Resource(UID);
        $this->model->add(new Statement($resourceDashboard,$predicateUID,$literalDashboardID));        
        
        $literalIndex = new Literal($index);
        $predicateIndex = new Resource(INDEX);        
        $this->model->add(new Statement($resourceDashboard,$predicateIndex,$literalIndex));
    }
}
?>