Merge branch '0.9.x' of git@gitorious.org:statusnet/mainline into 0.9.x

1 files changed, 645 insertions, 98 deletions

diff --git a/plugins/OStatus/OStatusPlugin.php b/plugins/OStatus/OStatusPlugin.php
index 3686c0226..efb630297 100644
--- a/plugins/OStatus/OStatusPlugin.php
+++ b/plugins/OStatus/OStatusPlugin.php
@@ -1,17 +1,7 @@
 <?php
 /*
-StatusNet Plugin: 0.9
-Plugin Name: FeedSub
-Plugin URI: http://status.net/wiki/Feed_subscription
-Description: FeedSub allows subscribing to real-time updates from external feeds supporting PubHubSubbub protocol.
-Version: 0.1
-Author: Brion Vibber <brion@status.net>
-Author URI: http://status.net/
-*/
-
-/*
  * StatusNet - the distributed open-source microblogging tool
- * Copyright (C) 2009, StatusNet, Inc.
+ * Copyright (C) 2009-2010, StatusNet, Inc.
  *
  * 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
@@ -28,16 +18,13 @@ Author URI: http://status.net/
  */
 
 /**
- * @package FeedSubPlugin
+ * @package OStatusPlugin
  * @maintainer Brion Vibber <brion@status.net>
  */
 
 if (!defined('STATUSNET') && !defined('LACONICA')) { exit(1); }
 
-define('FEEDSUB_SERVICE', 100); // fixme -- avoid hardcoding these?
-
-// We bundle the XML_Parse_Feed library...
-set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/extlib');
+set_include_path(get_include_path() . PATH_SEPARATOR . dirname(__FILE__) . '/extlib/');
 
 class FeedSubException extends Exception
 {
@@ -56,16 +43,20 @@ class OStatusPlugin extends Plugin
         // Discovery actions
         $m->connect('.well-known/host-meta',
                     array('action' => 'hostmeta'));
-        $m->connect('main/webfinger',
-                    array('action' => 'webfinger'));
+        $m->connect('main/xrd',
+                    array('action' => 'userxrd'));
+        $m->connect('main/ownerxrd',
+                    array('action' => 'ownerxrd'));
         $m->connect('main/ostatus',
                     array('action' => 'ostatusinit'));
         $m->connect('main/ostatus?nickname=:nickname',
                   array('action' => 'ostatusinit'), array('nickname' => '[A-Za-z0-9_-]+'));
+        $m->connect('main/ostatus?group=:group',
+                  array('action' => 'ostatusinit'), array('group' => '[A-Za-z0-9_-]+'));
         $m->connect('main/ostatussub',
                     array('action' => 'ostatussub'));
-        $m->connect('main/ostatussub',
-                    array('action' => 'ostatussub'), array('feed' => '[A-Za-z0-9\.\/\:]+'));
+        $m->connect('main/ostatusgroup',
+                    array('action' => 'ostatusgroup'));
 
         // PuSH actions
         $m->connect('main/push/hub', array('action' => 'pushhub'));
@@ -73,15 +64,13 @@ class OStatusPlugin extends Plugin
         $m->connect('main/push/callback/:feed',
                     array('action' => 'pushcallback'),
                     array('feed' => '[0-9]+'));
-        $m->connect('settings/feedsub',
-                    array('action' => 'feedsubsettings'));
 
         // Salmon endpoint
         $m->connect('main/salmon/user/:id',
-                    array('action' => 'salmon'),
+                    array('action' => 'usersalmon'),
                     array('id' => '[0-9]+'));
         $m->connect('main/salmon/group/:id',
-                    array('action' => 'salmongroup'),
+                    array('action' => 'groupsalmon'),
                     array('id' => '[0-9]+'));
         return true;
     }
@@ -93,9 +82,18 @@ class OStatusPlugin extends Plugin
      */
     function onEndInitializeQueueManager(QueueManager $qm)
     {
-        $qm->connect('hubverify', 'HubVerifyQueueHandler');
-        $qm->connect('hubdistrib', 'HubDistribQueueHandler');
+        // Prepare outgoing distributions after notice save.
+        $qm->connect('ostatus', 'OStatusQueueHandler');
+
+        // Outgoing from our internal PuSH hub
+        $qm->connect('hubconf', 'HubConfQueueHandler');
         $qm->connect('hubout', 'HubOutQueueHandler');
+
+        // Outgoing Salmon replies (when we don't need a return value)
+        $qm->connect('salmon', 'SalmonQueueHandler');
+
+        // Incoming from a foreign PuSH hub
+        $qm->connect('pushin', 'PushInQueueHandler');
         return true;
     }
 
@@ -104,29 +102,48 @@ class OStatusPlugin extends Plugin
      */
     function onStartEnqueueNotice($notice, &$transports)
     {
-        $transports[] = 'hubdistrib';
+        $transports[] = 'ostatus';
         return true;
     }
 
     /**
+     * Add a link header for LRDD Discovery
+     */
+    function onStartShowHTML($action)
+    {
+        if ($action instanceof ShowstreamAction) {
+            $acct = 'acct:'. $action->profile->nickname .'@'. common_config('site', 'server');
+            $url = common_local_url('userxrd');
+            $url.= '?uri='. $acct;
+
+            header('Link: <'.$url.'>; rel="'. Discovery::LRDD_REL.'"; type="application/xrd+xml"');
+        }
+    }
+
+    /**
      * Set up a PuSH hub link to our internal link for canonical timeline
      * Atom feeds for users and groups.
      */
-    function onStartApiAtom(AtomNoticeFeed $feed)
+    function onStartApiAtom($feed)
     {
         $id = null;
 
         if ($feed instanceof AtomUserNoticeFeed) {
-            $salmonAction = 'salmon';
-            $id = $feed->getUser()->id;
+            $salmonAction = 'usersalmon';
+            $user = $feed->getUser();
+            $id   = $user->id;
+            $profile = $user->getProfile();
+            $feed->setActivitySubject($profile->asActivityNoun('subject'));
         } else if ($feed instanceof AtomGroupNoticeFeed) {
-            $salmonAction = 'salmongroup';
-            $id = $feed->getGroup()->id;
+            $salmonAction = 'groupsalmon';
+            $group = $feed->getGroup();
+            $id = $group->id;
+            $feed->setActivitySubject($group->asActivitySubject());
         } else {
-            return;
+            return true;
         }
 
-       if (!empty($id)) {
+        if (!empty($id)) {
             $hub = common_config('ostatus', 'hub');
             if (empty($hub)) {
                 // Updates will be handled through our internal PuSH hub.
@@ -136,25 +153,9 @@ class OStatusPlugin extends Plugin
 
             // Also, we'll add in the salmon link
             $salmon = common_local_url($salmonAction, array('id' => $id));
-            $feed->addLink($salmon, array('rel' => 'salmon'));
+            $feed->addLink($salmon, array('rel' => Salmon::NS_REPLIES));
+            $feed->addLink($salmon, array('rel' => Salmon::NS_MENTIONS));
         }
-    }
-
-    /**
-     * Add the feed settings page to the Connect Settings menu
-     *
-     * @param Action &$action The calling page
-     *
-     * @return boolean hook return
-     */
-    function onEndConnectSettingsNav(&$action)
-    {
-        $action_name = $action->trimmed('action');
-
-        $action->menuItem(common_local_url('feedsubsettings'),
-                          _m('Feeds'),
-                          _m('Feed subscription options'),
-                          $action_name === 'feedsubsettings');
 
         return true;
     }
@@ -171,6 +172,12 @@ class OStatusPlugin extends Plugin
     {
         $base = dirname(__FILE__);
         $lower = strtolower($cls);
+        $map = array('activityverb' => 'activity',
+                     'activityobject' => 'activity',
+                     'activityutils' => 'activity');
+        if (isset($map[$lower])) {
+            $lower = $map[$lower];
+        }
         $files = array("$base/classes/$cls.php",
                        "$base/lib/$lower.php");
         if (substr($lower, -6) == 'action') {
@@ -207,66 +214,110 @@ class OStatusPlugin extends Plugin
         return false;
     }
 
+    function onStartGroupSubscribe($output, $group)
+    {
+        $cur = common_current_user();
+
+        if (empty($cur)) {
+            // Add an OStatus subscribe
+            $url = common_local_url('ostatusinit',
+                                    array('group' => $group->nickname));
+            $output->element('a', array('href' => $url,
+                                        'class' => 'entity_remote_subscribe'),
+                                _m('Join'));
+        }
+
+        return true;
+    }
+
     /**
      * Check if we've got remote replies to send via Salmon.
      *
      * @fixme push webfinger lookup & sending to a background queue
      * @fixme also detect short-form name for remote subscribees where not ambiguous
      */
+
     function onEndNoticeSave($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;
-                }
+    /**
+     * Find any explicit remote mentions. Accepted forms:
+     *   Webfinger: @user@example.com
+     *   Profile link: @example.com/mublog/user
+     * @param Profile $sender (os user?)
+     * @param string $text input markup text
+     * @param array &$mention in/out param: set of found mentions
+     * @return boolean hook return value
+     */
 
-                foreach ($result->links as $link) {
-                    if ($link['rel'] == 'salmon') {
-                        $endpoint_uri = $link['href'];
+    function onEndFindMentions($sender, $text, &$mentions)
+    {
+        $matches = array();
+
+        // Webfinger matches: @user@example.com
+        if (preg_match_all('!(?:^|\s+)@((?:\w+\.)*\w+@(?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+)!',
+                       $text,
+                       $wmatches,
+                       PREG_OFFSET_CAPTURE)) {
+            foreach ($wmatches[1] as $wmatch) {
+                list($target, $pos) = $wmatch;
+                $this->log(LOG_INFO, "Checking webfinger '$target'");
+                try {
+                    $oprofile = Ostatus_profile::ensureWebfinger($target);
+                    if ($oprofile && !$oprofile->isGroup()) {
+                        $profile = $oprofile->localProfile();
+                        $matches[$pos] = array('mentioned' => array($profile),
+                                               'text' => $target,
+                                               'position' => $pos,
+                                               'url' => $profile->profileurl);
                     }
+                } catch (Exception $e) {
+                    $this->log(LOG_ERR, "Webfinger check failed: " . $e->getMessage());
                 }
+            }
+        }
 
-                if (empty($endpoint_uri)) {
-                    continue;
+        // Profile matches: @example.com/mublog/user
+        if (preg_match_all('!(?:^|\s+)@((?:\w+\.)*\w+(?:\w+\-\w+)*\.\w+(?:/\w+)+)!',
+                       $text,
+                       $wmatches,
+                       PREG_OFFSET_CAPTURE)) {
+            foreach ($wmatches[1] as $wmatch) {
+                list($target, $pos) = $wmatch;
+                $schemes = array('http', 'https');
+                foreach ($schemes as $scheme) {
+                    $url = "$scheme://$target";
+                    $this->log(LOG_INFO, "Checking profile address '$url'");
+                    try {
+                        $oprofile = Ostatus_profile::ensureProfile($url);
+                        if ($oprofile && !$oprofile->isGroup()) {
+                            $profile = $oprofile->localProfile();
+                            $matches[$pos] = array('mentioned' => array($profile),
+                                                   'text' => $target,
+                                                   'position' => $pos,
+                                                   'url' => $profile->profileurl);
+                            break;
+                        }
+                    } catch (Exception $e) {
+                        $this->log(LOG_ERR, "Profile check failed: " . $e->getMessage());
+                    }
                 }
-
-                // 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);
             }
         }
-    }
 
-    /**
-     * Garbage collect unused feeds on unsubscribe
-     */
-    function onEndUnsubscribe($user, $other)
-    {
-        $profile = Ostatus_profile::staticGet('profile_id', $other->id);
-        if ($feed) {
-            $sub = new Subscription();
-            $sub->subscribed = $other->id;
-            $sub->limit(1);
-            if (!$sub->find(true)) {
-                common_log(LOG_INFO, "Unsubscribing from now-unused feed $feed->feeduri on hub $feed->huburi");
-                $profile->unsubscribe();
+        foreach ($mentions as $i => $other) {
+            // If we share a common prefix with a local user, override it!
+            $pos = $other['position'];
+            if (isset($matches[$pos])) {
+                $mentions[$i] = $matches[$pos];
+                unset($matches[$pos]);
             }
         }
+        foreach ($matches as $mention) {
+            $mentions[] = $mention;
+        }
+
         return true;
     }
 
@@ -276,7 +327,10 @@ class OStatusPlugin extends Plugin
     function onCheckSchema() {
         $schema = Schema::get();
         $schema->ensureTable('ostatus_profile', Ostatus_profile::schemaDef());
+        $schema->ensureTable('ostatus_source', Ostatus_source::schemaDef());
+        $schema->ensureTable('feedsub', FeedSub::schemaDef());
         $schema->ensureTable('hubsub', HubSub::schemaDef());
+        $schema->ensureTable('magicsig', Magicsig::schemaDef());
         return true;
     }
 
@@ -290,16 +344,509 @@ class OStatusPlugin extends Plugin
         return true;
     }
 
+    /**
+     * Override the "from ostatus" bit in notice lists to link to the
+     * original post and show the domain it came from.
+     *
+     * @param Notice in $notice
+     * @param string out &$name
+     * @param string out &$url
+     * @param string out &$title
+     * @return mixed hook return code
+     */
     function onStartNoticeSourceLink($notice, &$name, &$url, &$title)
     {
         if ($notice->source == 'ostatus') {
-            $bits = parse_url($notice->uri);
-            $domain = $bits['host'];
+            if ($notice->url) {
+                $bits = parse_url($notice->url);
+                $domain = $bits['host'];
+                if (substr($domain, 0, 4) == 'www.') {
+                    $name = substr($domain, 4);
+                } else {
+                    $name = $domain;
+                }
+
+                $url = $notice->url;
+                $title = sprintf(_m("Sent from %s via OStatus"), $domain);
+                return false;
+            }
+        }
+    }
+
+    /**
+     * Send incoming PuSH feeds for OStatus endpoints in for processing.
+     *
+     * @param FeedSub $feedsub
+     * @param DOMDocument $feed
+     * @return mixed hook return code
+     */
+    function onStartFeedSubReceive($feedsub, $feed)
+    {
+        $oprofile = Ostatus_profile::staticGet('feeduri', $feedsub->uri);
+        if ($oprofile) {
+            $oprofile->processFeed($feed, 'push');
+        } else {
+            common_log(LOG_DEBUG, "No ostatus profile for incoming feed $feedsub->uri");
+        }
+    }
+
+    /**
+     * When about to subscribe to a remote user, start a server-to-server
+     * PuSH subscription if needed. If we can't establish that, abort.
+     *
+     * @fixme If something else aborts later, we could end up with a stray
+     *        PuSH subscription. This is relatively harmless, though.
+     *
+     * @param Profile $subscriber
+     * @param Profile $other
+     *
+     * @return hook return code
+     *
+     * @throws Exception
+     */
+    function onStartSubscribe($subscriber, $other)
+    {
+        $user = User::staticGet('id', $subscriber->id);
+
+        if (empty($user)) {
+            return true;
+        }
+
+        $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
+
+        if (empty($oprofile)) {
+            return true;
+        }
+
+        if (!$oprofile->subscribe()) {
+            throw new Exception(_m('Could not set up remote subscription.'));
+        }
+    }
+
+    /**
+     * Having established a remote subscription, send a notification to the
+     * remote OStatus profile's endpoint.
+     *
+     * @param Profile $subscriber
+     * @param Profile $other
+     *
+     * @return hook return code
+     *
+     * @throws Exception
+     */
+    function onEndSubscribe($subscriber, $other)
+    {
+        $user = User::staticGet('id', $subscriber->id);
+
+        if (empty($user)) {
+            return true;
+        }
+
+        $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
+
+        if (empty($oprofile)) {
+            return true;
+        }
+
+        $act = new Activity();
+
+        $act->verb = ActivityVerb::FOLLOW;
+
+        $act->id   = TagURI::mint('follow:%d:%d:%s',
+                                  $subscriber->id,
+                                  $other->id,
+                                  common_date_iso8601(time()));
+
+        $act->time    = time();
+        $act->title   = _("Follow");
+        $act->content = sprintf(_("%s is now following %s."),
+                               $subscriber->getBestName(),
+                               $other->getBestName());
+
+        $act->actor   = ActivityObject::fromProfile($subscriber);
+        $act->object  = ActivityObject::fromProfile($other);
+
+        $oprofile->notifyActivity($act, $subscriber);
+
+        return true;
+    }
+
+    /**
+     * Notify remote server and garbage collect unused feeds on unsubscribe.
+     * @fixme send these operations to background queues
+     *
+     * @param User $user
+     * @param Profile $other
+     * @return hook return value
+     */
+    function onEndUnsubscribe($profile, $other)
+    {
+        $user = User::staticGet('id', $profile->id);
+
+        if (empty($user)) {
+            return true;
+        }
+
+        $oprofile = Ostatus_profile::staticGet('profile_id', $other->id);
+
+        if (empty($oprofile)) {
+            return true;
+        }
+
+        // Drop the PuSH subscription if there are no other subscribers.
+        $oprofile->garbageCollect();
+
+        $act = new Activity();
+
+        $act->verb = ActivityVerb::UNFOLLOW;
+
+        $act->id   = TagURI::mint('unfollow:%d:%d:%s',
+                                  $profile->id,
+                                  $other->id,
+                                  common_date_iso8601(time()));
+
+        $act->time    = time();
+        $act->title   = _("Unfollow");
+        $act->content = sprintf(_("%s stopped following %s."),
+                               $profile->getBestName(),
+                               $other->getBestName());
+
+        $act->actor   = ActivityObject::fromProfile($profile);
+        $act->object  = ActivityObject::fromProfile($other);
 
-            $name = $domain;
-            $url = $notice->uri;
-            $title = sprintf(_m("Sent from %s via OStatus"), $domain);
+        $oprofile->notifyActivity($act, $profile);
+
+        return true;
+    }
+
+    /**
+     * When one of our local users tries to join a remote group,
+     * notify the remote server. If the notification is rejected,
+     * deny the join.
+     *
+     * @param User_group $group
+     * @param User $user
+     *
+     * @return mixed hook return value
+     */
+
+    function onStartJoinGroup($group, $user)
+    {
+        $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
+        if ($oprofile) {
+            if (!$oprofile->subscribe()) {
+                throw new Exception(_m('Could not set up remote group membership.'));
+            }
+
+            $member = Profile::staticGet($user->id);
+
+            $act = new Activity();
+            $act->id = TagURI::mint('join:%d:%d:%s',
+                                    $member->id,
+                                    $group->id,
+                                    common_date_iso8601(time()));
+
+            $act->actor = ActivityObject::fromProfile($member);
+            $act->verb = ActivityVerb::JOIN;
+            $act->object = $oprofile->asActivityObject();
+
+            $act->time = time();
+            $act->title = _m("Join");
+            $act->content = sprintf(_m("%s has joined group %s."),
+                                    $member->getBestName(),
+                                    $oprofile->getBestName());
+
+            if ($oprofile->notifyActivity($act, $member)) {
+                return true;
+            } else {
+                $oprofile->garbageCollect();
+                throw new Exception(_m("Failed joining remote group."));
+            }
+        }
+    }
+
+    /**
+     * When one of our local users leaves a remote group, notify the remote
+     * server.
+     *
+     * @fixme Might be good to schedule a resend of the leave notification
+     * if it failed due to a transitory error. We've canceled the local
+     * membership already anyway, but if the remote server comes back up
+     * it'll be left with a stray membership record.
+     *
+     * @param User_group $group
+     * @param User $user
+     *
+     * @return mixed hook return value
+     */
+
+    function onEndLeaveGroup($group, $user)
+    {
+        $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
+        if ($oprofile) {
+            // Drop the PuSH subscription if there are no other subscribers.
+            $oprofile->garbageCollect();
+
+            $member = Profile::staticGet($user->id);
+
+            $act = new Activity();
+            $act->id = TagURI::mint('leave:%d:%d:%s',
+                                    $member->id,
+                                    $group->id,
+                                    common_date_iso8601(time()));
+
+            $act->actor = ActivityObject::fromProfile($member);
+            $act->verb = ActivityVerb::LEAVE;
+            $act->object = $oprofile->asActivityObject();
+
+            $act->time = time();
+            $act->title = _m("Leave");
+            $act->content = sprintf(_m("%s has left group %s."),
+                                    $member->getBestName(),
+                                    $oprofile->getBestName());
+
+            $oprofile->notifyActivity($act, $member);
+        }
+    }
+
+    /**
+     * Notify remote users when their notices get favorited.
+     *
+     * @param Profile or User $profile of local user doing the faving
+     * @param Notice $notice being favored
+     * @return hook return value
+     */
+
+    function onEndFavorNotice(Profile $profile, Notice $notice)
+    {
+        $user = User::staticGet('id', $profile->id);
+
+        if (empty($user)) {
+            return true;
+        }
+
+        $oprofile = Ostatus_profile::staticGet('profile_id', $notice->profile_id);
+
+        if (empty($oprofile)) {
+            return true;
+        }
+
+        $act = new Activity();
+
+        $act->verb = ActivityVerb::FAVORITE;
+        $act->id   = TagURI::mint('favor:%d:%d:%s',
+                                  $profile->id,
+                                  $notice->id,
+                                  common_date_iso8601(time()));
+
+        $act->time    = time();
+        $act->title   = _("Favor");
+        $act->content = sprintf(_("%s marked notice %s as a favorite."),
+                               $profile->getBestName(),
+                               $notice->uri);
+
+        $act->actor   = ActivityObject::fromProfile($profile);
+        $act->object  = ActivityObject::fromNotice($notice);
+
+        $oprofile->notifyActivity($act, $profile);
+
+        return true;
+    }
+
+    /**
+     * Notify remote users when their notices get de-favorited.
+     *
+     * @param Profile $profile Profile person doing the de-faving
+     * @param Notice  $notice  Notice being favored
+     *
+     * @return hook return value
+     */
+
+    function onEndDisfavorNotice(Profile $profile, Notice $notice)
+    {
+        $user = User::staticGet('id', $profile->id);
+
+        if (empty($user)) {
+            return true;
+        }
+
+        $oprofile = Ostatus_profile::staticGet('profile_id', $notice->profile_id);
+
+        if (empty($oprofile)) {
+            return true;
+        }
+
+        $act = new Activity();
+
+        $act->verb = ActivityVerb::UNFAVORITE;
+        $act->id   = TagURI::mint('disfavor:%d:%d:%s',
+                                  $profile->id,
+                                  $notice->id,
+                                  common_date_iso8601(time()));
+        $act->time    = time();
+        $act->title   = _("Disfavor");
+        $act->content = sprintf(_("%s marked notice %s as no longer a favorite."),
+                               $profile->getBestName(),
+                               $notice->uri);
+
+        $act->actor   = ActivityObject::fromProfile($profile);
+        $act->object  = ActivityObject::fromNotice($notice);
+
+        $oprofile->notifyActivity($act, $profile);
+
+        return true;
+    }
+
+    function onStartGetProfileUri($profile, &$uri)
+    {
+        $oprofile = Ostatus_profile::staticGet('profile_id', $profile->id);
+        if (!empty($oprofile)) {
+            $uri = $oprofile->uri;
+            return false;
+        }
+        return true;
+    }
+
+    function onStartUserGroupHomeUrl($group, &$url)
+    {
+        return $this->onStartUserGroupPermalink($group, $url);
+    }
+
+    function onStartUserGroupPermalink($group, &$url)
+    {
+        $oprofile = Ostatus_profile::staticGet('group_id', $group->id);
+        if ($oprofile) {
+            // @fixme this should probably be in the user_group table
+            // @fixme this uri not guaranteed to be a profile page
+            $url = $oprofile->uri;
             return false;
         }
     }
+
+    function onStartShowSubscriptionsContent($action)
+    {
+        $this->showEntityRemoteSubscribe($action);
+
+        return true;
+    }
+
+    function onStartShowUserGroupsContent($action)
+    {
+        $this->showEntityRemoteSubscribe($action, 'ostatusgroup');
+
+        return true;
+    }
+
+    function onEndShowSubscriptionsMiniList($action)
+    {
+        $this->showEntityRemoteSubscribe($action);
+
+        return true;
+    }
+
+    function onEndShowGroupsMiniList($action)
+    {
+        $this->showEntityRemoteSubscribe($action, 'ostatusgroup');
+
+        return true;
+    }
+
+    function showEntityRemoteSubscribe($action, $target='ostatussub')
+    {
+        $user = common_current_user();
+        if ($user && ($user->id == $action->profile->id)) {
+            $action->elementStart('div', 'entity_actions');
+            $action->elementStart('p', array('id' => 'entity_remote_subscribe',
+                                             'class' => 'entity_subscribe'));
+            $action->element('a', array('href' => common_local_url($target),
+                                        'class' => 'entity_remote_subscribe')
+                                , _m('Remote'));
+            $action->elementEnd('p');
+            $action->elementEnd('div');
+        }
+    }
+
+    /**
+     * Ping remote profiles with updates to this profile.
+     * Salmon pings are queued for background processing.
+     */
+    function onEndBroadcastProfile(Profile $profile)
+    {
+        $user = User::staticGet('id', $profile->id);
+
+        // Find foreign accounts I'm subscribed to that support Salmon pings.
+        //
+        // @fixme we could run updates through the PuSH feed too,
+        // in which case we can skip Salmon pings to folks who
+        // are also subscribed to me.
+        $sql = "SELECT * FROM ostatus_profile " .
+               "WHERE profile_id IN " .
+               "(SELECT subscribed FROM subscription WHERE subscriber=%d) " .
+               "OR group_id IN " .
+               "(SELECT group_id FROM group_member WHERE profile_id=%d)";
+        $oprofile = new Ostatus_profile();
+        $oprofile->query(sprintf($sql, $profile->id, $profile->id));
+
+        if ($oprofile->N == 0) {
+            common_log(LOG_DEBUG, "No OStatus remote subscribees for $profile->nickname");
+            return true;
+        }
+
+        $act = new Activity();
+
+        $act->verb = ActivityVerb::UPDATE_PROFILE;
+        $act->id   = TagURI::mint('update-profile:%d:%s',
+                                  $profile->id,
+                                  common_date_iso8601(time()));
+        $act->time    = time();
+        $act->title   = _m("Profile update");
+        $act->content = sprintf(_m("%s has updated their profile page."),
+                               $profile->getBestName());
+
+        $act->actor   = ActivityObject::fromProfile($profile);
+        $act->object  = $act->actor;
+
+        while ($oprofile->fetch()) {
+            $oprofile->notifyDeferred($act, $profile);
+        }
+
+        return true;
+    }
+
+    function onStartProfileListItemActionElements($item)
+    {
+        if (!common_logged_in()) {
+
+            $profileUser = User::staticGet('id', $item->profile->id);
+
+            if (!empty($profileUser)) {
+
+                $output = $item->out;
+
+                // Add an OStatus subscribe
+                $output->elementStart('li', 'entity_subscribe');
+                $url = common_local_url('ostatusinit',
+                                        array('nickname' => $profileUser->nickname));
+                $output->element('a', array('href' => $url,
+                                            'class' => 'entity_remote_subscribe'),
+                                 _m('Subscribe'));
+                $output->elementEnd('li');
+            }
+        }
+
+        return true;
+    }
+
+    function onPluginVersion(&$versions)
+    {
+        $versions[] = array('name' => 'OStatus',
+                            'version' => STATUSNET_VERSION,
+                            'author' => 'Evan Prodromou, James Walker, Brion Vibber, Zach Copley',
+                            'homepage' => 'http://status.net/wiki/Plugin:OStatus',
+                            'rawdescription' =>
+                            _m('Follow people across social networks that implement '.
+                               '<a href="http://ostatus.org/">OStatus</a>.'));
+
+        return true;
+    }
 }