<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * If you did not receive a copy of the license and are unable to

 * obtain it through the world-wide-web, please send an email

 * to license@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Json

 * @subpackage Server

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Cache.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/** Zend_Server_Cache */

require_once 'Zend/Server/Cache.php';

/**

 * Zend_Json_Server_Cache: cache Zend_Json_Server server definition and SMD

 *

 * @category   Zend

 * @package    Zend_Json

 * @subpackage Server

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Json_Server_Cache extends Zend_Server_Cache

{

    /**

     * Cache a service map description (SMD) to a file

     *

     * Returns true on success, false on failure

     *

     * @param  string $filename

     * @param  Zend_Json_Server $server

     * @return boolean

     */

    public static function saveSmd($filename, Zend_Json_Server $server)

    {

        if (!is_string($filename)

            || (!file_exists($filename) && !is_writable(dirname($filename))))

        {

            return false;

        }

        if (0 === @file_put_contents($filename, $server->getServiceMap()->toJson())) {

            return false;

        }

        return true;

    }

    /**

     * Retrieve a cached SMD

     *

     * On success, returns the cached SMD (a JSON string); an failure, returns

     * boolean false.

     *

     * @param  string $filename

     * @return string|false

     */

    public static function getSmd($filename)

    {

        if (!is_string($filename)

            || !file_exists($filename)

            || !is_readable($filename))

        {

            return false;

        }

        if (false === ($smd = @file_get_contents($filename))) {

            return false;

        }

        return $smd;

    }

    /**

     * Delete a file containing a cached SMD

     *

     * @param  string $filename

     * @return bool

     */

    public static function deleteSmd($filename)

    {

        if (is_string($filename) && file_exists($filename)) {

            unlink($filename);

            return true;

        }

        return false;

    }

}