only query missing list modes on MODE when we're seen ENDOFWHO

src/IRCChannel.py

@@ -22,6 +22,7 @@ class Channel(IRCObject.Object):
         self.user_modes = {} # type: typing.Dict[IRCUser.User, typing.Set]
         self.created_timestamp = None
         self.buffer = IRCBuffer.Buffer(bot, server)
+        self.seen_who = False
 
         self._setting_cache_prefix = "channelsetting%s-" % self.id
 

src/core_modules/line_handler/__init__.py

@@ -216,15 +216,20 @@ class Module(ModuleManager.BaseModule):
         user.account(self.events, event)
 
     # response to a WHO command for user information
-    @utils.hook("raw.received.352", default_event=True)
+    @utils.hook("raw.received.352")
     def handle_352(self, event):
         core.handle_352(self.events, event)
 
     # response to a WHOX command for user information, including account name
-    @utils.hook("raw.received.354", default_event=True)
+    @utils.hook("raw.received.354")
     def handle_354(self, event):
         core.handle_354(self.events, event)
 
+    # RPLENDOFWHO
+    @utils.hook("raw.received.315")
+    def handle_315(self, event):
+        core.handle_315(self.events, event)
+
     # response to an empty mode command
     @utils.hook("raw.received.324")
     def handle_324(self, event):

src/core_modules/line_handler/core.py

@@ -150,6 +150,14 @@ def handle_354(events, event):
         events.on("received.whox").call(server=event["server"],
             user=target)
 
+def handle_315(events, event):
+    target = event["line"].args[1]
+    if target in event["server"].channels:
+        channel = event["server"].channels.get(target)
+        events.on("received.endofwho").call(server=event["server"],
+            channel=channel)
+        channel.seen_who = True
+
 def _nick_in_use(server):
     new_nick = "%s|" % server.connection_params.nickname
     server.send_nick(new_nick)

src/core_modules/mode_lists.py

@@ -75,19 +75,18 @@ class Module(ModuleManager.BaseModule):
                     self._mask_add(event["channel"], mode[1], arg)
                 else:
                     self._mask_remove(event["channel"], mode[1], arg)
+            elif mode[1] in dict(event["server"].prefix_modes):
+                if (event["server"].irc_equals(event["server"].nickname, arg)
+                        and event["channel"].seen_who):
+                    self._query_lists(event["server"], event["channel"])
 
-    @utils.hook("received.315")
-    def who_end(self, event):
-        channel = self._channel(event)
 
-        if channel:
-            missed = set(event["server"].channel_list_modes)-set(
-                channel.mode_lists.keys())
-            if missed:
-                channel.send_mode("+%s" % "".join(missed))
+    def _query_lists(self, server, channel):
+        seen = set(k.lstrip("~") for k in channel.mode_lists.keys())
+        missing = set(server.channel_list_modes)-seen
+        if missing:
+            channel.send_mode("+%s" % "".join(missing))
 
     @utils.hook("self.join")
     def self_join(self, event):
-        event["channel"].send_mode("+%s" %
-            "".join(event["server"].channel_list_modes))
-
+        self._query_lists(event["server"], event["channel"])