Add method to subscription handler to check online members, and put check in Channel typeclass for using this based on settings option.

evennia/comms/comms.py

@@ -2,6 +2,7 @@
 Base typeclass for in-game Channels.
 
 """
+from django.conf import settings
 
 from evennia.typeclasses.models import TypeclassBase
 from evennia.comms.models import TempMsg, ChannelDB
@@ -246,7 +247,11 @@ class DefaultChannel(with_metaclass(TypeclassBase, ChannelDB)):
 
         """
         # get all players or objects connected to this channel and send to them
-        for entity in self.subscriptions.all():
+        if online:
+            subs = self.subscriptions.online()
+        else:
+            subs = self.subscriptions.all()
+        for entity in subs:
             # if the entity is muted, we don't send them a message
             if entity in self.mutelist:
                 continue
@@ -262,7 +267,7 @@ class DefaultChannel(with_metaclass(TypeclassBase, ChannelDB)):
             logger.log_file(msgobj.message, self.attributes.get("log_file") or "channel_%s.log" % self.key)
 
     def msg(self, msgobj, header=None, senders=None, sender_strings=None,
-            keep_log=None, online=False, emit=False, external=False):
+            keep_log=None, online=settings.CHANNELS_MSG_OFFLINE, emit=False, external=False):
         """
         Send the given message to all players connected to channel. Note that
         no permission-checking is done here; it is assumed to have been