<?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) 2005-2012 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';

/**

 * Bit.ly API implementation

 *

 * @category   Zend

 * @package    Zend_Service_ShortUrl

 * @copyright  Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)

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

 */

class Zend_Service_ShortUrl_BitLy extends Zend_Service_ShortUrl_AbstractShortener

{

    /**

     * Base URI of the service

     *

     * @var string

     */

    protected $_apiUri = 'http://api.bitly.com';

    /**

     * user login name

     *

     * @var string

     */

    protected $_loginName;

    /**

     * user API key or application access token

     *

     * @var string

     */

    protected $_apiKey;

    /**

     * @param string $login user login name or application access token

     * @param null|string $apiKey user API key

     */

    public function __construct($login, $apiKey = null)

    {

        if(null === $apiKey) {

            $this->setOAuthAccessToken($login);

        } else {

            $this->setApiLogin($login, $apiKey);

        }

    }

    /**

     * set OAuth credentials

     *

     * @param $accessToken

     * @return Zend_Service_ShortUrl_BitLy

     */

    public function setOAuthAccessToken($accessToken)

    {

        $this->_apiKey = $accessToken;

        $this->_loginName = null;

        return $this;

    }

    /**

     * set login credentials

     *

     * @param $login

     * @param $apiKey

     * @return Zend_Service_ShortUrl_BitLy

     */

    public function setApiLogin($login, $apiKey)

    {

        $this->_apiKey = $apiKey;

        $this->_loginName = $login;

        return $this;

    }

    /**

     * prepare http client

     * @return void

     */

    protected function _setAccessParameter()

    {

        if(null === $this->_loginName) {

            //OAuth login

            $this->getHttpClient()->setParameterGet('access_token', $this->_apiKey);

        } else {

            //login/APIKey authentication

            $this->getHttpClient()->setParameterGet('login',$this->_loginName);

            $this->getHttpClient()->setParameterGet('apiKey',$this->_apiKey);

        }

    }

    /**

     * handle bit.ly response

     *

     * @return string

     * @throws Zend_Service_ShortUrl_Exception

     */

    protected function _processRequest()

    {

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

        if(500 == $response->getStatus()) {

            throw new Zend_Service_ShortUrl_Exception('Bit.ly :: '.$response->getBody());

        }

        return $response->getBody();

    }

    /**

     * This function shortens long url

     *

     * @param  string $url URL to Shorten

     * @throws Zend_Service_ShortUrl_Exception if bit.ly reports an error

     * @return string Shortened Url

     */

    public function shorten($url)

    {

        $this->_validateUri($url);

        $this->_setAccessParameter();

        $this->getHttpClient()->setUri($this->_apiUri.'/v3/shorten');

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

        $this->getHttpClient()->setParameterGet('format','txt');

        return $this->_processRequest();

    }

    /**

     * Reveals target for short URL

     *

     * @param  string $shortenedUrl URL to reveal target of

     * @throws Zend_Service_ShortUrl_Exception if bit.ly reports an error

     * @return string Unshortened Url

     */

    public function unshorten($shortenedUrl)

    {

        $this->_validateUri($shortenedUrl);

        $this->_setAccessParameter();

        $this->getHttpClient()->setUri($this->_apiUri.'/v3/expand');

        $this->getHttpClient()->setParameterGet('shortUrl',$shortenedUrl);

        $this->getHttpClient()->setParameterGet('format','txt');

        return $this->_processRequest();

    }

}