add rollcall support

Anna.hs

@@ -67,8 +67,11 @@ tokenDispatch (Just userName) (Just chn) ts = if elem "PRIVMSG" ts
           | elem "o/" tokens  = updateRightGreets
           | elem "\\o" tokens = updateLeftGreets
           | otherwise         = case head tokens of
-              "!greets" -> greets chn
-              _         -> return ()
+              -- TODO: make reader monad for this? passing chn is a little tedious
+              "!greets"   -> greets chn
+              "!rollcall" -> rollcall chn
+              "!anna"     -> anna chn
+              _           -> return ()
         tokens = case length msgTokens of
           1 -> [rstrip $ tail $ head msgTokens]
           _ -> (tail $ head msgTokens) : ((init $ tail msgTokens) ++ [(rstrip $ last msgTokens)])
@@ -103,9 +106,15 @@ greets chn = do
       displayLine = "o/ - " ++ (head contentLines) ++ " vs \\o - " ++ (head $ tail contentLines)
   sendMessage chn displayLine
 
+rollcall :: String -> Net ()
+rollcall chn = sendMessage chn "Hello! I respond to !anna and !greets. My source code is available at https://git.tilde.town/opfez/anna"
+anna = rollcall
+
 timezone :: String -> String -> Net ()
 timezone chn username = undefined
 
+
+
 -- Basic commands
 write :: String -> String -> Net ()
 write cmd args = do