[FreeNetwork] First steps porting webfinger/lrdd to v3, GET webfinger requests already have a basic result

components/FreeNetwork/Util/WebfingerResource/WebfingerResourceNote.php

@@ -0,0 +1,58 @@
+<?php
+
+namespace Component\FreeNetwork\Util\WebfingerResource;
+
+use App\Core\Event;
+use App\Entity\Note;
+use Component\FreeNetwork\Util\WebfingerResource;
+use PharIo\Manifest\InvalidUrlException;
+use XML_XRD;
+use XML_XRD_Element_Link;
+
+/**
+ * WebFinger resource for Note objects
+ *
+ * @package   GNUsocial
+ *
+ * @author    Mikael Nordfeldth
+ * @copyright 2013 Free Software Foundation, Inc.
+ * @license   http://www.fsf.org/licensing/licenses/agpl-3.0.html AGPL 3.0
+ *
+ * @see      http://status.net/
+ */
+class WebfingerResourceNote extends WebfingerResource
+{
+    public function __construct(Note $object = null)
+    {
+        // The type argument above verifies that it's our class
+        parent::__construct($object);
+    }
+
+    public function updateXRD(XML_XRD $xrd)
+    {
+        if (Event::handle('StartWebFingerNoticeLinks', [$xrd, $this->object])) {
+            if ($this->object->isLocal()) {
+                $xrd->links[] = new XML_XRD_Element_Link('alternate',
+                    common_local_url('ApiStatusesShow',
+                        ['id'        => $this->object->id,
+                            'format' => 'atom', ]),
+                    'application/atom+xml');
+
+                $xrd->links[] = new XML_XRD_Element_Link('alternate',
+                    common_local_url('ApiStatusesShow',
+                        ['id'        => $this->object->id,
+                            'format' => 'json', ]),
+                    'application/json');
+            } else {
+                try {
+                    $xrd->links[] = new XML_XRD_Element_Link('alternate',
+                        $this->object->getUrl(),
+                        'text/html');
+                } catch (InvalidUrlException $e) {
+                    // don't do a fallback in webfinger
+                }
+            }
+            Event::handle('EndWebFingerNoticeLinks', [$xrd, $this->object]);
+        }
+    }
+}