old_contents: from twisted.plugin import IPlugin
  from twisted.words.protocols import irc
  from txircd.module_interface import IMode, IModuleData, Mode, ModuleData
  from txircd.utils import ModeType
  from zope.interface import implements
  
  class NoExtMsgMode(ModuleData, Mode):
      implements(IPlugin, IModuleData, IMode)
      
      name = "NoExtMsgMode"
      core = True
      affectedActions = [ "commandmodify-PRIVMSG", "commandmodify-NOTICE" ]
      
      def hookIRCd(self, ircd):
          self.ircd = ircd
      
      def channelModes(self):
          return [ ("n", ModeType.NoParam, self) ]
      
      def actions(self):
          return [ ("modeactioncheck-channel-n-commandpermission-PRIVMSG", 1, self.channelHasMode),
                  ("modeactioncheck-channel-n-commandpermission-NOTICE", 1, self.channelHasMode) ]
      
      def apply(self, actionType, channel, param, user, command, data):
          if user not in channel.users and channel in data["targetchans"]:
              del data["targetchans"][channel]
              user.sendMessage(irc.ERR_CANNOTSENDTOCHAN, channel.name, ":Cannot send to channel (no external messages)")
      
      def channelHasMode(self, channel, user, command, data):
          if "n" in channel.modes:
              return ""
          return None
  
  noExtMsgMode = NoExtMsgMode()
new_contents: from twisted.plugin import IPlugin
  from twisted.words.protocols import irc
  from txircd.module_interface import IMode, IModuleData, Mode, ModuleData
  from txircd.utils import ModeType
  from zope.interface import implements
  
  class NoExtMsgMode(ModuleData, Mode):
      implements(IPlugin, IModuleData, IMode)
      
      name = "NoExtMsgMode"
      core = True
      affectedActions = [ "commandmodify-PRIVMSG", "commandmodify-NOTICE" ]
      
      def hookIRCd(self, ircd):
          self.ircd = ircd
      
      def channelModes(self):
          return [ ("n", ModeType.NoParam, self) ]
      
      def actions(self):
          return [ ("modeactioncheck-channel-n-commandmodify-PRIVMSG", 1, self.channelHasMode),
                  ("modeactioncheck-channel-n-commandmodify-NOTICE", 1, self.channelHasMode) ]
      
      def apply(self, actionType, channel, param, user, command, data):
          if user not in channel.users and channel in data["targetchans"]:
              del data["targetchans"][channel]
              user.sendMessage(irc.ERR_CANNOTSENDTOCHAN, channel.name, ":Cannot send to channel (no external messages)")
      
      def channelHasMode(self, channel, user, command, data):
          if "n" in channel.modes:
              return ""
          return None
  
  noExtMsgMode = NoExtMsgMode()
subject: Fix mode +n specification so that it actually fires ever