<?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_Service_ShortUrl

 * @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: $

 */

/**

 * @see Zend_Service_ShortUrl_AbstractShortener

 */

require_once 'Zend/Service/ShortUrl/AbstractShortener.php';

/**

 * Is.gd API implementation

 *

 * @category   Zend

 * @package    Zend_Service_ShortUrl

 * @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_Service_ShortUrl_IsGd extends Zend_Service_ShortUrl_AbstractShortener

{

    /**

     * Base URI of the service

     *

     * @var string

     */

    protected $_baseUri = 'http://is.gd';

    /**

     * This function shortens long url

     *

     * @param string $url URL to Shorten

     * @throws Zend_Service_ShortUrl_Exception When URL is not valid

     * @return string New URL

     */

    public function shorten($url)

    {

        $this->_validateUri($url);

        $serviceUri = 'http://is.gd/api.php';

        $this->getHttpClient()->resetParameters(true);

        $this->getHttpClient()->setUri($serviceUri);

        $this->getHttpClient()->setParameterGet('longurl', $url);

        $response = $this->getHttpClient()->request();

        return $response->getBody();

    }

   /**

     * Reveals target for short URL

     *

     * @param string $shortenedUrl URL to reveal target of

     * @throws Zend_Service_ShortUrl_Exception When URL is not valid or is not shortened by this service

     * @return string

     */

    public function unshorten($shortenedUrl)

    {

        $this->_validateUri($shortenedUrl);

        $this->_verifyBaseUri($shortenedUrl);

        $this->getHttpClient()->resetParameters(true);

        $this->getHttpClient()->setUri($shortenedUrl);

        $this->getHttpClient()->setConfig(array('maxredirects' => 0));

        $response = $this->getHttpClient()->request();

        if ($response->isError()) {

            require_once 'Zend/Service/ShortUrl/Exception.php';

            throw new Zend_Service_ShortUrl_Exception($response->getMessage());

        }

        if ($response->isRedirect()) {

            return $response->getHeader('Location');

        }

        require_once 'Zend/Service/ShortUrl/Exception.php';

        throw new Zend_Service_ShortUrl_Exception('Url unshortening was not successful');

    }

}