add hooks for OStatus notification on subscribe/unsubscribe

plugins/OStatus/OStatusPlugin.php

@@ -335,4 +335,48 @@ class OStatusPlugin extends Plugin
             common_log(LOG_DEBUG, "No ostatus profile for incoming feed $feedsub->uri");
         }
     }
+
+    function onEndSubscribe($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;
+        }
+
+        // We have a local user subscribing to a remote profile; make the
+        // magic happen!
+
+        $oprofile->notify($subscriber, ActivityVerb::FOLLOW);
+
+        return true;
+    }
+
+    function onEndUnsubscribe($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;
+        }
+
+        // We have a local user subscribing to a remote profile; make the
+        // magic happen!
+
+        $oprofile->notify($subscriber, ActivityVerb::UNFOLLOW);
+
+        return true;
+    }
 }