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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 license@zend.com so we can send you a copy immediately.
*
* @category Zend
* @package Zend_Feed_Reader
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
* @version $Id: FeedSet.php 19105 2009-11-20 17:13:54Z padraic $
*/
/**
* @see Zend_Feed_Reader
*/
require_once 'Zend/Feed/Reader.php';
/**
* @see Zend_Uri
*/
require_once 'Zend/Uri.php';
/**
* @category Zend
* @package Zend_Feed_Reader
* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
class Zend_Feed_Reader_FeedSet extends ArrayObject
{
public $rss = null;
public $rdf = null;
public $atom = null;
/**
* Import a DOMNodeList from any document containing a set of links
* for alternate versions of a document, which will normally refer to
* RSS/RDF/Atom feeds for the current document.
*
* All such links are stored internally, however the first instance of
* each RSS, RDF or Atom type has its URI stored as a public property
* as a shortcut where the use case is simply to get a quick feed ref.
*
* Note that feeds are not loaded at this point, but will be lazy
* loaded automatically when each links 'feed' array key is accessed.
*
* @param DOMNodeList $links
* @param string $uri
* @return void
*/
public function addLinks(DOMNodeList $links, $uri)
{
foreach ($links as $link) {
if (strtolower($link->getAttribute('rel')) !== 'alternate'
|| !$link->getAttribute('type') || !$link->getAttribute('href')) {
continue;
}
if (!isset($this->rss) && $link->getAttribute('type') == 'application/rss+xml') {
$this->rss = $this->_absolutiseUri(trim($link->getAttribute('href')), $uri);
} elseif(!isset($this->atom) && $link->getAttribute('type') == 'application/atom+xml') {
$this->atom = $this->_absolutiseUri(trim($link->getAttribute('href')), $uri);
} elseif(!isset($this->rdf) && $link->getAttribute('type') == 'application/rdf+xml') {
$this->rdf = $this->_absolutiseUri(trim($link->getAttribute('href')), $uri);
}
$this[] = new self(array(
'rel' => 'alternate',
'type' => $link->getAttribute('type'),
'href' => $this->_absolutiseUri(trim($link->getAttribute('href')), $uri),
));
}
}
/**
* Attempt to turn a relative URI into an absolute URI
*/
protected function _absolutiseUri($link, $uri = null)
{
if (!Zend_Uri::check($link)) {
if (!is_null($uri)) {
$uri = Zend_Uri::factory($uri);
if ($link[0] !== '/') {
$link = $uri->getPath() . '/' . $link;
}
$link = $uri->getScheme() . '://' . $uri->getHost() . '/' . $this->_canonicalizePath($link);
if (!Zend_Uri::check($link)) {
$link = null;
}
}
}
return $link;
}
/**
* Canonicalize relative path
*/
protected function _canonicalizePath($path)
{
$parts = array_filter(explode('/', $path));
$absolutes = array();
foreach ($parts as $part) {
if ('.' == $part) {
continue;
}
if ('..' == $part) {
array_pop($absolutes);
} else {
$absolutes[] = $part;
}
}
return implode('/', $absolutes);
}
/**
* Supports lazy loading of feeds using Zend_Feed_Reader::import() but
* delegates any other operations to the parent class.
*
* @param string $offset
* @return mixed
* @uses Zend_Feed_Reader
*/
public function offsetGet($offset)
{
if ($offset == 'feed' && !$this->offsetExists('feed')) {
if (!$this->offsetExists('href')) {
return null;
}
$feed = Zend_Feed_Reader::import($this->offsetGet('href'));
$this->offsetSet('feed', $feed);
return $feed;
}
return parent::offsetGet($offset);
}
}
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