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{-# LANGUAGE DoAndIfThenElse #-}
module KikiD.Message where
import Data.Serialize as Cereal
import qualified Data.ByteString.Char8 as B
import Data.Monoid
import Text.Read
import Data.Char (ord,chr)
import Control.Monad
import Data.Bytes.Serial as R
import Data.Bytes.Put as Put
import Data.Bytes.Get as Get
import Codec.LineReady
import Control.Monad.Loops
import Data.Word
data KikiDMessage = TODO deriving (Show,Read)
instance Serialize KikiDMessage where
put m = mapM_ (Cereal.putWord8 . fromIntegral . ord) "TO\nO"
-- putByteString . B.pack $ show m ++ "\n"
get = do
t <- Cereal.getWord8
o <- Cereal.getWord8
d <- Cereal.getWord8
o <- Cereal.getWord8
let s = map (chr . fromIntegral) [t,o,d,o]
if "TO\nO" == s
then return TODO
else fail ("Could not decode message: " ++ show s)
instance Serial KikiDMessage where
serialize m = Put.putByteString . toLineReady . Cereal.encode $ m
deserialize = do
xs <- unfoldM $ do
flag <- Get.isEmpty
if flag then return Nothing else do
c <- fmap (chr . fromIntegral) Get.getWord8
if (c == '\n') then return Nothing else return (Just c)
case (Cereal.decode . fromLineReady $ B.pack xs) of
Left str -> fail str
Right x -> return x
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