library/Zend/Feed/Reader/Extension/CreativeCommons/Feed.php

   1 <?php
   2 /**
   3  * Zend Framework
   4  *
   5  * LICENSE
   6  *
   7  * This source file is subject to the new BSD license that is bundled
   8  * with this package in the file LICENSE.txt.
   9  * It is also available through the world-wide-web at this URL:
  10  * http://framework.zend.com/license/new-bsd
  11  * If you did not receive a copy of the license and are unable to
  12  * obtain it through the world-wide-web, please send an email
  13  * to license@zend.com so we can send you a copy immediately.
  14  *
  15  * @category   Zend
  16  * @package    Zend_Feed_Reader
  17  * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
  18  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  19  * @version    $Id: Feed.php 16971 2009-07-22 18:05:45Z mikaelkael $
  20  */
  21
  22 /**
  23  * @see Zend_Feed_Reader_Extension_FeedAbstract
  24  */
  25 require_once 'Zend/Feed/Reader/Extension/FeedAbstract.php';
  26
  27 /**
  28  * @category   Zend
  29  * @package    Zend_Feed_Reader
  30  * @copyright  Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
  31  * @license    http://framework.zend.com/license/new-bsd     New BSD License
  32  */
  33 class Zend_Feed_Reader_Extension_CreativeCommons_Feed
  34     extends Zend_Feed_Reader_Extension_FeedAbstract
  35 {
  36     /**
  37      * Get the entry license
  38      *
  39      * @return string|null
  40      */
  41     public function getLicense($index = 0)
  42     {
  43         $licenses = $this->getLicenses();
  44
  45         if (isset($licenses[$index])) {
  46             return $licenses[$index];
  47         }
  48
  49         return null;
  50     }
  51
  52     /**
  53      * Get the entry licenses
  54      *
  55      * @return array
  56      */
  57     public function getLicenses()
  58     {
  59         $name = 'licenses';
  60         if (array_key_exists($name, $this->_data)) {
  61             return $this->_data[$name];
  62         }
  63
  64         $licenses = array();
  65         $list = $this->_xpath->evaluate('channel/cc:license');
  66
  67         if ($list->length) {
  68             foreach ($list as $license) {
  69                 $licenses[] = $license->nodeValue;
  70             }
  71
  72             $licenses = array_unique($licenses);
  73         }
  74
  75         $this->_data[$name] = $licenses;
  76
  77         return $this->_data[$name];
  78     }
  79
  80     /**
  81      * Register Creative Commons namespaces
  82      *
  83      * @return void
  84      */
  85     protected function _registerNamespaces()
  86     {
  87         $this->_xpath->registerNamespace('cc', 'http://backend.userland.com/creativeCommonsRssModule');
  88     }
  89 }