<?php

class UserRDFWriter
{

	protected $model;
	protected $fileName = 'users/users.rdf';
			
    public function __construct()
    {
        // Create empty MemModel
		$factory = new ModelFactory();
		$this->model = $factory->getDefaultModel();
		
		if(file_exists($this->fileName))
			$this->model->load($this->fileName);
    }
	
	public function saveUsers()
	{						
		$this->model->saveAs($this->fileName,'rdf');
	}
	
	public function addNewUser($name)
	{
		$userID = md5( uniqid(rand(), true) );
		
		$resourceUser = new Resource(USER . '/' . $userID);
		
		$resourceUserType = new Resource(USER);
		$predicateRType = new Resource(RTYPE);
		$this->model->add(new Statement($resourceUser,$predicateRType,$resourceUserType));
		
		$literalUserID = new Literal($userID);
		$predicateUniqueID = new Resource(UID);
		$this->model->add(new Statement($resourceUser,$predicateUniqueID,$literalUserID));		
	}

}

?>