+ /**
+ * Add in an OStatus subscribe button
+ */
+ function onStartProfileRemoteSubscribe($output, $profile)
+ {
+ $cur = common_current_user();
+
+ if (empty($cur)) {
+ // Add an OStatus subscribe
+ $output->elementStart('li', 'entity_subscribe');
+ $url = common_local_url('ostatusinit',
+ array('nickname' => $profile->nickname));
+ $output->element('a', array('href' => $url,
+ 'class' => 'entity_remote_subscribe'),
+ _m('Subscribe'));
+
+ $output->elementEnd('li');
+ }
+
+ return false;
+ }
+
+ /**
+ * Check if we've got remote replies to send via Salmon.
+ *
+ * @fixme push webfinger lookup & sending to a background queue
+ * @fixme also detect short-form name for remote subscribees where not ambiguous
+ */
+ function onEndNoticeSave($notice)
+ {
+ $count = preg_match_all('/(\w+\.)*\w+@(\w+\.)*\w+(\w+\-\w+)*\.\w+/', $notice->content, $matches);
+ if ($count) {
+ foreach ($matches[0] as $webfinger) {
+
+ // FIXME: look up locally first
+
+ // Check to see if we've got an actual webfinger
+ $w = new Webfinger;
+
+ $endpoint_uri = '';
+
+ $result = $w->lookup($webfinger);
+ if (empty($result)) {
+ continue;
+ }
+
+ foreach ($result->links as $link) {
+ if ($link['rel'] == 'salmon') {
+ $endpoint_uri = $link['href'];
+ }
+ }
+
+ if (empty($endpoint_uri)) {
+ continue;
+ }
+
+ // FIXME: this needs to go out in a queue handler
+
+ $xml = '<?xml version="1.0" encoding="UTF-8" ?>';
+ $xml .= $notice->asAtomEntry();
+
+ $salmon = new Salmon();
+ $salmon->post($endpoint_uri, $xml);
+ }
+ }
+ }
+
+ /**
+ * Notify remote server and garbage collect unused feeds on unsubscribe.
+ * @fixme send these operations to background queues
+ *
+ * @param User $user
+ * @param Profile $other
+ * @return hook return value
+ */
+ function onEndUnsubscribe($user, $other)
+ {
+ if ($user instanceof Profile) {
+ $profile = $user;
+ } else if ($user instanceof Profile) {
+ $profile = $user->getProfile();
+ }
+ $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
+ if ($oprofile) {
+ // Notify the remote server of the unsub, if supported.
+ $oprofile->notify($profile, ActivityVerb::UNFOLLOW, $oprofile);
+
+ // Drop the PuSH subscription if there are no other subscribers.
+ $sub = new Subscription();
+ $sub->subscribed = $other->id;
+ $sub->limit(1);
+ if (!$sub->find(true)) {
+ common_log(LOG_INFO, "Unsubscribing from now-unused feed $oprofile->feeduri");
+ $oprofile->unsubscribe();
+ }
+ }
+ return true;
+ }
+
+ /**
+ * Make sure necessary tables are filled out.
+ */