discovery piece - hand merged :P

1 files changed, 183 insertions, 0 deletions

diff --git a/plugins/OStatus/lib/XRD.php b/plugins/OStatus/lib/XRD.php
new file mode 100644
index 000000000..16d27f8eb
--- /dev/null
+++ b/plugins/OStatus/lib/XRD.php
@@ -0,0 +1,183 @@
+<?php
+/**
+ * StatusNet - the distributed open-source microblogging tool
+ * Copyright (C) 2010, StatusNet, Inc.
+ *
+ * A sample module to show best practices for StatusNet plugins
+ *
+ * PHP version 5
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package   StatusNet
+ * @author    James Walker <james@status.net>
+ * @copyright 2010 StatusNet, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ * @link      http://status.net/
+ */
+
+
+class XRD
+{
+    const XML_NS = 'http://www.w3.org/2000/xmlns/';
+    
+    const XRD_NS = 'http://docs.oasis-open.org/ns/xri/xrd-1.0';
+
+    const HOST_META_NS = 'http://host-meta.net/xrd/1.0';
+    
+    public $expires;
+
+    public $subject;
+
+    public $host;
+
+    public $alias = array();
+    
+    public $types = array();
+    
+    public $links = array();
+    
+    public static function parse($xml)
+    {
+        $xrd = new XRD();
+
+        $dom = new DOMDocument();
+        $dom->loadXML($xml);
+        $xrd_element = $dom->getElementsByTagName('XRD')->item(0);
+
+        // Check for host-meta host
+        $host = $xrd_element->getElementsByTagName('Host')->item(0)->nodeValue;
+        if ($host) {
+            $xrd->host = $host;
+        }
+
+        // Loop through other elements
+        foreach ($xrd_element->childNodes as $node) {
+            switch ($node->tagName) {
+            case 'Expires':
+                $xrd->expires = $node->nodeValue;
+                break;
+            case 'Subject':
+                $xrd->subject = $node->nodeValue;
+                break;
+                
+            case 'Alias':
+                $xrd->alias[] = $node->nodeValue;
+                break;
+
+            case 'Link':
+                $xrd->links[] = $xrd->parseLink($node);
+                break;
+
+            case 'Type':
+                $xrd->types[] = $xrd->parseType($node);
+                break;
+
+            }
+        }
+        return $xrd;
+    }
+
+    public function toXML()
+    {
+        $dom = new DOMDocument('1.0', 'UTF-8');
+        $dom->formatOutput = true;
+        
+        $xrd_dom = $dom->createElementNS(XRD::XRD_NS, 'XRD');
+        $dom->appendChild($xrd_dom);
+
+        if ($this->host) {
+            $host_dom = $dom->createElement('hm:Host', $this->host);
+            $xrd_dom->setAttributeNS(XRD::XML_NS, 'xmlns:hm', XRD::HOST_META_NS);
+            $xrd_dom->appendChild($host_dom);
+        }
+        
+		if ($this->expires) {
+			$expires_dom = $dom->createElement('Expires', $this->expires);
+			$xrd_dom->appendChild($expires_dom);
+		}
+
+		if ($this->subject) {
+			$subject_dom = $dom->createElement('Subject', $this->subject);
+			$xrd_dom->appendChild($subject_dom);
+		}
+
+		foreach ($this->alias as $alias) {
+			$alias_dom = $dom->createElement('Alias', $alias);
+			$xrd_dom->appendChild($alias_dom);
+		}
+
+		foreach ($this->types as $type) {
+			$type_dom = $dom->createElement('Type', $type);
+			$xrd_dom->appendChild($type_dom);
+		}
+
+		foreach ($this->links as $link) {
+			$link_dom = $this->saveLink($dom, $link);
+			$xrd_dom->appendChild($link_dom);
+		}
+
+        return $dom->saveXML();
+    }
+
+    function parseType($element)
+    {
+        return array();
+    }
+    
+    function parseLink($element)
+    {
+        $link = array();
+        $link['rel'] = $element->getAttribute('rel');
+        $link['type'] = $element->getAttribute('type');
+        $link['href'] = $element->getAttribute('href');
+        $link['template'] = $element->getAttribute('template');
+        foreach ($element->childNodes as $node) {
+            switch($node->tagName) {
+            case 'Title':
+                $link['title'][] = $node->nodeValue;
+            }
+        }
+
+        return $link;
+    }
+
+    function saveLink($doc, $link)
+    {
+        $link_element = $doc->createElement('Link');
+        if ($link['rel']) {
+            $link_element->setAttribute('rel', $link['rel']);
+        }
+        if ($link['type']) {
+            $link_element->setAttribute('type', $link['type']);
+        }
+        if ($link['href']) {
+            $link_element->setAttribute('href', $link['href']);
+        }
+        if ($link['template']) {
+            $link_element->setAttribute('template', $link['template']);
+        }
+
+        if (is_array($link['title'])) {
+            foreach($link['title'] as $title) {
+                $title = $doc->createElement('Title', $title);
+                $link_element->appendChild($title);
+            }
+        }
+
+        
+        return $link_element;
+    }
+}
+