refactor all checks for channel_type to server.is_channel()

modules/config.py

@@ -53,7 +53,7 @@ class Module(ModuleManager.BaseModule):
             else:
                 #we're in a channel
                 return channel, "channelset", None
-        if context_desc_lower[0] in server.channel_types:
+        elif server.is_channel(context_desc):
             return context_desc, "channelset", context_desc
         elif server.irc_lower(context_desc) == user.nickname_lower:
             return user, "set", None

modules/line_handler/core.py

@@ -77,7 +77,7 @@ def _own_modes(server, modes):
 def mode(events, event):
     user = event["server"].get_user(event["line"].source.nickname)
     target = event["line"].args[0]
-    is_channel = target[0] in event["server"].channel_types
+    is_channel = event["server"].is_channel(target)
     if is_channel:
         channel = event["server"].channels.get(target)
         modes = event["line"].args[1]

modules/line_handler/message.py

@@ -41,10 +41,9 @@ def message(events, event):
     # voiced-or-above users
     target = target_str.lstrip("".join(event["server"].statusmsg))
 
-    is_channel = False
+    is_channel = event["server"].is_channel(target)
 
-    if target[0] in event["server"].channel_types:
+    if is_channel:
-        is_channel = True
         if not target in event["server"].channels:
             return
         target_obj = event["server"].channels.get(target)

src/IRCChannels.py

@@ -34,8 +34,8 @@ class Channels(object):
         return self._server.irc_lower(channel_name)
 
     def contains(self, name: str) -> bool:
-        lower = self._name_lower(name)
+        return (self._server.is_channel(name) and
-        return name[0] in self._server.channel_types and lower in self._channels
+            self._name_lower(name) in self._channels)
 
     def add(self, name: str) -> IRCChannel.Channel:
         id = self.get_id(name)

src/IRCServer.py

@@ -186,10 +186,13 @@ class Server(IRCObject.Object):
         for channel in user.channels:
             channel.remove_user(user)
 
+    def is_channel(self, name: str) -> bool:
+        return name[0] in self.channel_types
+
     def get_target(self, name: str
             ) -> typing.Optional[
             typing.Union[IRCChannel.Channel, IRCUser.User]]:
-        if name[0] in self.channel_types:
+        if self.is_channel(name):
             if name in self.channels:
                 return self.channels.get(name)
         else: