irc: make channels configurable on a per-actor basis

viera.yaml.example

@@ -25,10 +25,17 @@ irc:
   # channels for the bot to join
   channels:
     - '#mychannel'
+    - '#myotherchannel'
 
   # channels for the bot to relay AP posts to
   relay_channels:
-    - '#mychannel'
+
+    # allow any AP actor to be relayed
+    '#mychannel': []
+
+    # allow only one AP actor to be relayed
+    '#myotherchannel':
+      - 'https://example.org/~alyssa'
 
   # IRC services credentials.
   sasl_username: viera

viera/irc.py

@@ -254,8 +254,9 @@ class IRCProtocol(asyncio.Protocol):
         if len(content) > 256:
             msgcontent += '...'
 
+        targets = [chan for chan, actors in IRC_CONFIG['relay_channels'].items() if not actors or actor['id'] in actors]
         message = fmt.format(name=actor['name'], content=msgcontent, url=obj['id'])
-        target = ','.join(IRC_CONFIG['relay_channels'])
+        target = ','.join(targets)
 
         self.say(target, message)