<?php

class UserRDFWriter
{
    protected $model;
    protected $fileName = 'data/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($name,$password)
    {
        $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));

        $literalUserName = new Literal($name);
        $predicateName = new Resource(NAME);
        $this->model->add(new Statement($resourceUser,$predicateName,$literalUserName));	

        $literalUserID = new Literal($userID);
        $predicateUniqueID = new Resource(UID);
        $this->model->add(new Statement($resourceUser,$predicateUniqueID,$literalUserID));		

        $literalPassword = new Literal($password);
        $predicatePassword = new Resource(PASSWORD);
        $this->model->add(new Statement($resourceUser,$predicatePassword,$literalPassword));	
    }

}

?>