<?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_Feed_Reader

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

 */

/**

 * @see Zend_Feed_Reader

 */

require_once 'Zend/Feed/Reader.php';

/**

 * @see Zend_Feed_Reader_Extension_EntryAbstract

 */

require_once 'Zend/Feed/Reader/Extension/EntryAbstract.php';

/**

 * @category   Zend

 * @package    Zend_Feed_Reader

 * @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_Feed_Reader_Extension_WellFormedWeb_Entry

    extends Zend_Feed_Reader_Extension_EntryAbstract

{

    /**

     * Get the entry comment Uri

     *

     * @return string|null

     */

    public function getCommentFeedLink()

    {

        $name = 'commentRss';

        if (array_key_exists($name, $this->_data)) {

            return $this->_data[$name];

        }

        $data = $this->_xpath->evaluate('string(' . $this->getXpathPrefix() . '/wfw:' . $name . ')');

        if (!$data) {

            $data = null;

        }

        $this->_data[$name] = $data;

        return $data;

    }

    /**

     * Register Slash namespaces

     *

     * @return void

     */

    protected function _registerNamespaces()

    {

        $this->_xpath->registerNamespace('wfw', 'http://wellformedweb.org/CommentAPI/');

    }

}