Take remote profiles into account when looking up canonical profile URIs

EVENTS.txt

@@ -1,4 +1,4 @@
-\InitializePlugin: a chance to initialize a plugin in a complete environment
+InitializePlugin: a chance to initialize a plugin in a complete environment
 
 CleanupPlugin: a chance to cleanup a plugin at the end of a program
 
@@ -722,3 +722,6 @@ StartRobotsTxt: Before outputting the robots.txt page
 EndRobotsTxt: After the default robots.txt page (good place for customization)
 - &$action: RobotstxtAction being shown
 
+GetProfileUri: When determining the canonical URI for a given profile
+- &$profile: the current profile
+

classes/Notice.php

@@ -1036,7 +1036,7 @@ class Notice extends Memcached_DataObject
                 $xs->element(
                     'link', array(
                         'rel' => 'ostatus:attention',
-                        'href' => $profile->getAcctUri()
+                        'href' => $profile->getUri()
                     )
                 );
             }

classes/Profile.php

@@ -810,10 +810,7 @@ class Profile extends Memcached_DataObject
         $xs->element(
             'id',
             null,
-            common_local_url(
+            $this->getUri()
-                'userbyid',
-                array('id' => $this->id)
-                )
             );
         $xs->element('title', null, $this->getBestName());
 
@@ -835,9 +832,21 @@ class Profile extends Memcached_DataObject
         return $xs->getString();
     }
 
-    function getAcctUri()
+    function getUri()
     {
-        return $this->nickname . '@' . common_config('site', 'server');
+        if (Event::handle('GetProfileUri', array($this))) {
+
+            $remote = Remote_profile::staticGet('id', $this->id);
+
+            if (!empty($remote)) {
+                return $remote->uri;
+            } else {
+                return common_local_url(
+                    'userbyid',
+                    array('id' => $this->id)
+                );
+            }
+        }
     }
 
 }