<?php

/*

 * This file is part of the Assetic package, an OpenSky project.

 *

 * (c) 2010-2011 OpenSky Project Inc

 *

 * For the full copyright and license information, please view the LICENSE

 * file that was distributed with this source code.

 */

namespace Assetic\Factory\Resource;

/**

 * A resource is something formulae can be loaded from.

 *

 * @author Kris Wallsmith <kris.wallsmith@gmail.com>

 */

interface ResourceInterface

{

    /**

     * Checks if a timestamp represents the latest resource.

     *

     * @param integer $timestamp A UNIX timestamp

     *

     * @return Boolean True if the timestamp is up to date

     */

    function isFresh($timestamp);

    /**

     * Returns the content of the resource.

     *

     * @return string The content

     */

    function getContent();

    /**

     * Returns a unique string for the current resource.

     *

     * @return string A unique string to identity the current resource

     */

    function __toString();

}