+ /**
+ * Transmits a profile relocation to a given inbox
+ *
+ * @param integer $uid User ID
+ * @param string $inbox Target inbox
+ *
+ * @return boolean was the transmission successful?
+ */
+ public static function sendProfileRelocation($uid, $inbox)
+ {
+ $owner = User::getOwnerDataById($uid);
+
+ $data = ['@context' => ActivityPub::CONTEXT,
+ 'id' => System::baseUrl() . '/activity/' . System::createGUID(),
+ 'type' => 'dfrn:relocate',
+ 'actor' => $owner['url'],
+ 'object' => $owner['url'],
+ 'published' => DateTimeFormat::utcNow(DateTimeFormat::ATOM),
+ 'instrument' => ['type' => 'Service', 'name' => BaseObject::getApp()->getUserAgent()],
+ 'to' => [ActivityPub::PUBLIC_COLLECTION],
+ 'cc' => []];
+
+ $signed = LDSignature::sign($data, $owner);
+
+ Logger::log('Deliver profile relocation for user ' . $uid . ' to ' . $inbox . ' via ActivityPub', Logger::DEBUG);
+ return HTTPSignature::transmit($signed, $inbox, $uid);
+ }
+