<?php

namespace Vn\Web;

require_once (__DIR__.'/rest-service.php');

use Vn\Lib;

/**
 * Base class for REST services.
 **/
abstract class RestRequest extends \Vn\Lib\Method
{
	const PARAMS = NULL;
	const LOGIN_REQUIRED = TRUE;
	
	function runRest ()
	{
		try {
			$db = $this->login ();
		}
		catch (Exception $e)
		{
			if (self::LOGIN_REQUIRED)
				throw $e;
		}

		if (self::PARAMS !== NULL && !$this->checkParams ($_REQUEST, self::PARAMS))
			throw new Lib\UserException  (s('Missing parameters'));
		
		return $this->run ($db);
	}

	/**
	 * Authenticates the user agaisnt database and returns its associated
	 * database connection.
	 *
	 * return Db\Conn The database connection
	 **/
	function login ()
	{
		return $this->app->login ();
	}
	
	/**
	 * Logouts the current user.
	 **/
	function logout ()
	{
		$this->app->logout ();
	}
}

?>