Don't send pins until a subscription is established, since unpin events never come in that case.

api.py

@@ -137,7 +137,7 @@ def Subscribe(google_user, client, client_address, instance_id, args):
     # Probably a race with the channel opening
     return {
       'result': 'retry',
-      'events': subject.GetEvents(messages, last_id, args['subject']),
+      'events': subject.GetEvents(messages, last_id, args['subject'], pins=False),
     }
 
   return {

clients/c/cosmopolite.c

@@ -237,14 +237,10 @@ static void cosmo_handle_event(cosmo *instance, json_t *event) {
   const char *event_type = json_string_value(json_object_get(event, "event_type"));
   if (strcmp(event_type, "message") == 0) {
     cosmo_handle_message(instance, event);
-  /*
-  // This can all come back once we have channel support.
   } else if (strcmp(event_type, "pin") == 0) {
     cosmo_handle_pin(instance, event);
-  // unpin never fires when we're just polling
   } else if (strcmp(event_type, "unpin") == 0) {
     cosmo_handle_unpin(instance, event);
-  */
   } else {
     fprintf(stderr, "unknown event type: %s\n", event_type);
   }

lib/models.py

@@ -365,8 +365,10 @@ class Subject(db.Model):
             for event in events]
 
   @db.transactional()
-  def GetEvents(self, messages, last_id, request):
+  def GetEvents(self, messages, last_id, request, pins=True):
-    events = [m.ToEvent() for m in self.GetPins()]
+    events = []
+    if pins:
+      events.extend(m.ToEvent() for m in self.GetPins())
     if messages:
       events.extend(m.ToEvent() for m in self.GetRecentMessages(messages))
     if last_id is not None: