rss.php

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<?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 [e-mail] so we can send you a copy immediately.
 *
 * @category   Zend
 * @package    Zend_Feed
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 * @version    $Id: Rss.php 8064 2008-02-16 10:58:39Z thomas $
 */


/**
 * @see Zend_Feed_Abstract
 */
require_once 'Zend/Feed/Abstract.php';

/**
 * @see Zend_Feed_Entry_Rss
 */
require_once 'Zend/Feed/Entry/Rss.php';


/**
 * RSS channel class
 *
 * The Zend_Feed_Rss class is a concrete subclass of
 * Zend_Feed_Abstract meant for representing RSS channels. It does not
 * add any methods to its parent, just provides a classname to check
 * against with the instanceof operator, and expects to be handling
 * RSS-formatted data instead of Atom.
 *
 * @category   Zend
 * @package    Zend_Feed
 * @copyright  Copyright (c) 2005-2008 Zend Technologies USA Inc. (http://www.zend.com)
 * @license    http://framework.zend.com/license/new-bsd     New BSD License
 */
class Zend_Feed_Rss extends Zend_Feed_Abstract
{
    /**
     * The classname for individual channel elements.
     *
     * @var string
     */
    protected $_entryClassName = 'Zend_Feed_Entry_Rss';

    /**
     * The element name for individual channel elements (RSS <item>s).
     *
     * @var string
     */
    protected $_entryElementName = 'item';

    /**
     * The default namespace for RSS channels.
     *
     * @var string
     */
    protected $_defaultNamespace = 'rss';

    /**
     * Override Zend_Feed_Abstract to set up the $_element and $_entries aliases.
     *
     * @return void
     * @throws Zend_Feed_Exception
     */
    public function __wakeup()
    {
        parent::__wakeup();

        // Find the base channel element and create an alias to it.
        $this->_element = $this->_element->getElementsByTagName('channel')->item(0);
        if (!$this->_element) {
            /** 
             * @see Zend_Feed_Exception
             */
            require_once 'Zend/Feed/Exception.php';
            throw new Zend_Feed_Exception('No root <channel> element found, cannot parse channel.');
        }

        // Find the entries and save a pointer to them for speed and
        // simplicity.
        $this->_buildEntryCache();
    }


    /**
     * Make accessing some individual elements of the channel easier.
     *
     * Special accessors 'item' and 'items' are provided so that if
     * you wish to iterate over an RSS channel's items, you can do so
     * using foreach ($channel->items as $item) or foreach
     * ($channel->item as $item).
     *
     * @param  string $var The property to access.
     * @return mixed
     */
    public function __get($var)
    {
        switch ($var) {
            case 'item':
                // fall through to the next case
            case 'items':
                return $this;

            default:
                return parent::__get($var);
        }
    }

    /**
     * Generate the header of the feed when working in write mode
     *
     * @param  array $array the data to use
     * @return DOMElement root node
     */
    protected function _mapFeedHeaders($array)
    {
        $channel = $this->_element->createElement('channel');

        $title = $this->_element->createElement('title');
        $title->appendChild($this->_element->createCDATASection($array->title));
        $channel->appendChild($title);

        $link = $this->_element->createElement('link', $array->link);
        $channel->appendChild($link);

        $desc = isset($array->description) ? $array->description : '';
        $description = $this->_element->createElement('description');
        $description->appendChild($this->_element->createCDATASection($desc));
        $channel->appendChild($description);

        $pubdate = isset($array->lastUpdate) ? $array->lastUpdate : time();
        $pubdate = $this->_element->createElement('pubDate', gmdate('r', $pubdate));
        $channel->appendChild($pubdate);

        if (isset($array->published)) {
            $lastBuildDate = $this->_element->createElement('lastBuildDate', gmdate('r', $array->published));
        }

        $editor = '';
        if (!empty($array->email)) {
            $editor .= $array->email;
        }
        if (!empty($array->author)) {
            $editor .= ' (' . $array->author . ')';
        }
        if (!empty($editor)) {
            $author = $this->_element->createElement('managingEditor', ltrim($editor));
            $channel->appendChild($author);
        }
        if (isset($array->webmaster)) {
            $channel->appendChild($this->_element->createElement('webMaster', $array->webmaster));
        }

        if (!empty($array->copyright)) {
            $copyright = $this->_element->createElement('copyright', $array->copyright);
            $channel->appendChild($copyright);
        }

        if (!empty($array->image)) {
            $image = $this->_element->createElement('image');
            $url = $this->_element->createElement('url', $array->image);
            $image->appendChild($url);
            $imagetitle = $this->_element->createElement('title', $array->title);
            $image->appendChild($imagetitle);
            $imagelink = $this->_element->createElement('link', $array->link);
            $image->appendChild($imagelink);

            $channel->appendChild($image);
        }

        $generator = !empty($array->generator) ? $array->generator : 'Zend_Feed';
        $generator = $this->_element->createElement('generator', $generator);
        $channel->appendChild($generator);

        if (!empty($array->language)) {
            $language = $this->_element->createElement('language', $array->language);
            $channel->appendChild($language);
        }

        $doc = $this->_element->createElement('docs', 'http://blogs.law.harvard.edu/tech/rss');
        $channel->appendChild($doc);

        if (isset($array->cloud)) {
            $cloud = $this->_element->createElement('cloud');
            $cloud->setAttribute('domain', $array->cloud['uri']->getHost());
            $cloud->setAttribute('port', $array->cloud['uri']->getPort());
            $cloud->setAttribute('path', $array->cloud['uri']->getPath());
            $cloud->setAttribute('registerProcedure', $array->cloud['procedure']);
            $cloud->setAttribute('protocol', $array->cloud['protocol']);
            $channel->appendChild($cloud);
        }

        if (isset($array->rating)) {
            $rating = $this->_element->createElement('rating', $array->rating);
            $channel->appendChild($rating);
        }

        if (isset($array->textInput)) {
            $textinput = $this->_element->createElement('textInput');
            $textinput->appendChild($this->_element->createElement('title', $array->textInput['title']));
            $textinput->appendChild($this->_element->createElement('description', $array->textInput['description']));
            $textinput->appendChild($this->_element->createElement('name', $array->textInput['name']));
            $textinput->appendChild($this->_element->createElement('link', $array->textInput['link']));
            $channel->appendChild($textinput);
        }

        if (isset($array->skipHours)) {
            $skipHours = $this->_element->createElement('skipHours');
            foreach ($array->skipHours as $hour) {
                $skipHours->appendChild($this->_element->createElement('hour', $hour));
            }
            $channel->appendChild($skipHours);
        }

        if (isset($array->skipDays)) {
            $skipDays = $this->_element->createElement('skipDays');
            foreach ($array->skipDays as $day) {
                $skipDays->appendChild($this->_element->createElement('day', $day));
            }
            $channel->appendChild($skipDays);
        }

        if (isset($array->itunes)) {
            $this->_buildiTunes($channel, $array);
        }

        return $channel;
    }

    /**
     * Adds the iTunes extensions to a root node
     *
     * @param  DOMElement $root
     * @param  array $array
     * @return void
     */
    private function _buildiTunes(DOMElement $root, $array)
    {
        /* author node */
        $author = '';