kevin-0.9.0: Kevin/Protocol.hs

module Kevin.Protocol (kevinServer) where

import Control.Exception.Lens
import Control.Monad.State
import Data.Default
import Data.Monoid (mempty)
import Kevin.Base
import qualified Kevin.Damn.Protocol as S
import qualified Kevin.IRC.Protocol as C
import Kevin.Util.Logger
import Prelude

watchInterrupt :: [Handler IO (Maybe Kevin)]
watchInterrupt = [ handler _AsyncException throw
                 , handler_ id (return Nothing) ]

mkKevin :: Socket -> IO (Maybe Kevin)
mkKevin sock = flip catches watchInterrupt . withSocketsDo
    $ do (client, _, _) <- accept sock
         hSetBuffering client NoBuffering
         klogNow Blue "received a client"
         s <- execStateT (C.getAuthInfo client False) def
         damnSock <- connectTo "chat.deviantart.com" $ PortNumber 3900
         hSetBuffering damnSock NoBuffering
         logChan <- newChan
         damnChan <- newChan
         ircChan <- newChan
         return . Just $ Kevin damnSock
                               client
                               damnChan
                               ircChan
                               s
                               mempty
                               mempty
                               mempty
                               mempty
                               False
                               logChan

mkListener :: Int -> IO Socket
mkListener = listenOn . PortNumber . fromIntegral

kevinServer :: Int -> IO ()
kevinServer n = do sock <- mkListener n
                   putStrLn $ "Listening on port " ++ show n
                   forever $ do kev <- mkKevin sock
                                case kev of Just k -> listen k
                                            Nothing -> return ()

listen :: Kevin -> IO ()
listen k = do mvar <- newTVarIO k
              runLogger (logger k)
              runPrinter (dChan k) (damn k)
              runPrinter (iChan k) (irc k)
              forkIO . void $ runReaderT (bracket_ S.initialize (S.cleanup >> io (closeClient k)) S.listen) mvar
              forkIO . void $ runReaderT (bracket_ (return ()) (C.cleanup >> io (closeServer k)) C.listen) mvar
              return ()