104 lines
3.1 KiB
Haskell
104 lines
3.1 KiB
Haskell
{-# LANGUAGE RecordWildCards, ScopedTypeVariables #-}
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module Network.IRC.Client(run) where
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import Control.Exception
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import Control.Concurrent
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import Control.Monad.Reader
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import Network
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import Prelude hiding (log)
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import System.IO
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import System.Time
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import System.Timeout
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import Text.Printf
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import Network.IRC.Handlers
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import Network.IRC.Protocol
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import Network.IRC.Types
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data Status = Connected | Disconnected | Joined | Kicked | Errored
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deriving (Show, Eq)
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oneSec = 1000000
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io = liftIO
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log msg = putStrLn $ "** " ++ msg
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sendCommand :: Bot -> Command -> IO ()
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sendCommand Bot{ .. } reply = do
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let line = lineFromCommand botConfig reply
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hPrintf socket "%s\r\n" line >> printf "> %s\n" line
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listen :: Status -> IRC Status
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listen status = do
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bot@Bot{ .. } <- ask
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let nick = botNick botConfig
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when (status == Kicked) $
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io $ threadDelay (5 * oneSec) >> sendCommand bot JoinCmd
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mLine <- io . timeout (oneSec * botTimeout botConfig) . hGetLine $ socket
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case mLine of
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Nothing -> return Disconnected
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Just l -> do
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let line = init l
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time <- io getClockTime
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io $ printf "[%s] %s\n" (show time) line
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let message = msgFromLine botConfig time line
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nStatus <- io $ case message of
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JoinMsg { .. } | userNick user == nick -> log "Joined" >> return Joined
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KickMsg { .. } -> log "Kicked" >> return Kicked
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_ -> do
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forkIO $ case message of
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Ping { .. } -> sendCommand bot $ Pong msg
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ModeMsg { user = Self, .. } -> sendCommand bot JoinCmd
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msg -> forM_ (handlers botConfig) $ \handler -> do
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cmd <- handleMessage handler botConfig msg
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case cmd of
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Nothing -> return ()
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Just cmd -> sendCommand bot cmd
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return status
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listen nStatus
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connect :: BotConfig -> IO Bot
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connect botConfig@BotConfig{ .. } = do
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log "Connecting ..."
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handle <- connectToWithRetry
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hSetBuffering handle LineBuffering
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hSetBuffering stdout LineBuffering
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log "Connected"
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return $ Bot botConfig handle
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where
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connectToWithRetry = connectTo server (PortNumber (fromIntegral port))
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`catch` (\(e :: SomeException) -> do
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log ("Error: " ++ show e ++ ". Waiting.")
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threadDelay (5 * oneSec)
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connectToWithRetry)
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disconnect :: Bot -> IO ()
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disconnect bot = do
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log "Disconnecting ..."
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hClose . socket $ bot
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log "Disconnected"
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run :: BotConfig -> IO ()
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run botConfig = withSocketsDo $ do
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status <- run_
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case status of
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Disconnected -> log "Connection timedout" >> run botConfig
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Errored -> return ()
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where
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run_ = bracket (connect botConfig) disconnect $ \bot ->
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go bot `catch` \(e :: SomeException) -> do
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log $ "Exception! " ++ show e
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return Errored
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go bot = do
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sendCommand bot NickCmd
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sendCommand bot UserCmd
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runReaderT (listen Connected) bot
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