--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/web/Zend/Feed/Reader/FeedSet.php	Mon Dec 13 18:29:26 2010 +0100
@@ -0,0 +1,148 @@
+<?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: FeedSet.php 22662 2010-07-24 17:37:36Z mabe $
+ */
+
+/**
+ * @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) 2005-2010 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 ($uri !== null) {
+                $uri = Zend_Uri::factory($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);
+    }
+
+}