<?php

class UserRDFReader
{
	protected $model;
			
    public function __construct()
    {
        // Create empty MemModel
		$factory = new ModelFactory();
		$this->model = $factory->getDefaultModel();
		
		$fileName = 'users/users.rdf';
		
		if(file_exists($fileName))
			$this->model->load($fileName);
    }
	
	public function readUserInfo($userID)
	{
		$querystring = '
			PREFIX 	predicates: <' . SURVEYTOOL_PREDICATES_NAMESPACE . '>
			PREFIX	resources: <' . SURVEYTOOL_RESOURCES_NAMESPACE . '>
			SELECT 	?name 
			WHERE 	
			{
				_user		predicates:resource_type	resources:user ;
							predicates:uid				"' . $userID . '"	;
							predicates:name 			?name 	
			}';
			
		$result = $this->model->sparqlQuery($querystring);
				
		return $result;
	}
}

?>