add support for more than one active channel

Anna.hs

@@ -13,7 +13,7 @@ import Control.Monad.Trans.Reader
 hostname = "127.0.0.1"
 port     = 6667
 name     = "anna"
-channels = ["#bots"]
+channels = ["#foo", "#bots"]
 
 data Bot = Bot { socket :: Handle }
 type Net = ReaderT Bot IO
@@ -36,9 +36,10 @@ listen :: Net ()
 listen = forever $ do
   h <- asks socket
   line <- liftIO $ hGetLine h
+  let tokens = words line
   -- Debug print
   liftIO $ putStrLn line
-  tokenDispatch (parseUser $ tail line) (words line)
+  tokenDispatch (parseUser $ tail line) (parseChannel tokens) tokens
     where parseUser str = userName
             where userName = getName str
 
@@ -52,25 +53,29 @@ listen = forever $ do
                     | elemIndex c1 arr == Nothing = False
                     | elemIndex c2 arr == Nothing = True
                     | otherwise = elemIndex c1 arr < elemIndex c2 arr
+          parseChannel ts
+            | length ts > 3 = Just $ ts !! 2
+            | otherwise     = Nothing
 
-tokenDispatch :: Maybe String -> [String] -> Net ()
-tokenDispatch _ ("PING":_) = pong
-tokenDispatch _ []         = return ()
-tokenDispatch (Just userName) ts = if elem "PRIVMSG" ts
+tokenDispatch :: Maybe String -> Maybe String -> [String] -> Net ()
+tokenDispatch _ _ ("PING":_) = pong
+tokenDispatch _ _ []         = return ()
+tokenDispatch (Just userName) (Just chn) ts = if elem "PRIVMSG" ts
                                               then helper
                                               else return ()
   where helper
           | elem "o/" tokens  = updateRightGreets
           | elem "\\o" tokens = updateLeftGreets
           | otherwise         = case head tokens of
-              "!greets" -> greets $ head channels
+              "!greets" -> greets chn
               _         -> return ()
         tokens = case length msgTokens of
           1 -> [rstrip $ tail $ head msgTokens]
           _ -> (tail $ head msgTokens) : ((init $ tail msgTokens) ++ [(rstrip $ last msgTokens)])
         msgTokens = drop 3 ts
         rstrip = reverse . dropWhile isSpace . reverse
-tokenDispatch Nothing _         = return ()
+tokenDispatch Nothing _ _ = return ()
+tokenDispatch _ Nothing _ = return ()
 
 -- Bot commands
 updateRightGreets :: Net ()
@@ -96,9 +101,11 @@ greets chn = do
   content <- liftIO $ readFile "greets"
   let contentLines = lines content
       displayLine = "o/ - " ++ (head contentLines) ++ " vs \\o - " ++ (head $ tail contentLines)
-  liftIO $ putStrLn displayLine
   sendMessage chn displayLine
 
+timezone :: String -> String -> Net ()
+timezone chn username = undefined
+
 -- Basic commands
 write :: String -> String -> Net ()
 write cmd args = do