Version 1

[yaffs-website] / vendor / zendframework / zend-feed / src / Reader / FeedSet.php

diff --git a/vendor/zendframework/zend-feed/src/Reader/FeedSet.php b/vendor/zendframework/zend-feed/src/Reader/FeedSet.php
new file mode 100644 (file)
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+++ b/vendor/zendframework/zend-feed/src/Reader/FeedSet.php
@@ -0,0 +1,170 @@
+<?php
+/**
+ * Zend Framework (http://framework.zend.com/)
+ *
+ * @link      http://github.com/zendframework/zf2 for the canonical source repository
+ * @copyright Copyright (c) 2005-2015 Zend Technologies USA Inc. (http://www.zend.com)
+ * @license   http://framework.zend.com/license/new-bsd New BSD License
+ */
+
+namespace Zend\Feed\Reader;
+
+use ArrayObject;
+use DOMNodeList;
+use Zend\Feed\Uri;
+
+class 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 static([
+                'rel' => 'alternate',
+                'type' => $link->getAttribute('type'),
+                'href' => $this->absolutiseUri(trim($link->getAttribute('href')), $uri),
+            ]);
+        }
+    }
+
+    /**
+     *  Attempt to turn a relative URI into an absolute URI
+     *
+     *  @param string $link
+     *  @param string $uri OPTIONAL
+     *  @return string|null absolutised link or null if invalid
+     */
+    protected function absolutiseUri($link, $uri = null)
+    {
+        $linkUri = Uri::factory($link);
+        if ($linkUri->isAbsolute()) {
+            // invalid absolute link can not be recovered
+            return $linkUri->isValid() ? $link : null;
+        }
+
+        $scheme = 'http';
+        if ($uri !== null) {
+            $uri = Uri::factory($uri);
+            $scheme = $uri->getScheme() ?: $scheme;
+        }
+
+        if ($linkUri->getHost()) {
+            $link = $this->resolveSchemeRelativeUri($link, $scheme);
+        } elseif ($uri !== null) {
+            $link = $this->resolveRelativeUri($link, $scheme, $uri->getHost(), $uri->getPath());
+        }
+
+        if (! Uri::factory($link)->isValid()) {
+            return null;
+        }
+
+        return $link;
+    }
+
+    /**
+     * Resolves scheme relative link to absolute
+     *
+     * @param string $link
+     * @param string $scheme
+     * @return string
+     */
+    private function resolveSchemeRelativeUri($link, $scheme)
+    {
+        $link = ltrim($link, '/');
+        return sprintf('%s://%s', $scheme, $link);
+    }
+
+    /**
+     *  Resolves relative link to absolute
+     *
+     *  @param string $link
+     *  @param string $scheme
+     *  @param string $host
+     *  @param string $uriPath
+     *  @return string
+     */
+    private function resolveRelativeUri($link, $scheme, $host, $uriPath)
+    {
+        if ($link[0] !== '/') {
+            $link = $uriPath . '/' . $link;
+        }
+        return sprintf(
+            '%s://%s/%s',
+            $scheme,
+            $host,
+            $this->canonicalizePath($link)
+        );
+    }
+
+    /**
+     *  Canonicalize relative path
+     */
+    protected function canonicalizePath($path)
+    {
+        $parts = array_filter(explode('/', $path));
+        $absolutes = [];
+        foreach ($parts as $part) {
+            if ('.' == $part) {
+                continue;
+            }
+            if ('..' == $part) {
+                array_pop($absolutes);
+            } else {
+                $absolutes[] = $part;
+            }
+        }
+        return implode('/', $absolutes);
+    }
+
+    /**
+     * Supports lazy loading of feeds using Reader::import() but
+     * delegates any other operations to the parent class.
+     *
+     * @param string $offset
+     * @return mixed
+     */
+    public function offsetGet($offset)
+    {
+        if ($offset == 'feed' && ! $this->offsetExists('feed')) {
+            if (! $this->offsetExists('href')) {
+                return;
+            }
+            $feed = Reader::import($this->offsetGet('href'));
+            $this->offsetSet('feed', $feed);
+            return $feed;
+        }
+        return parent::offsetGet($offset);
+    }
+}