236 lines
8.8 KiB
Haskell
236 lines
8.8 KiB
Haskell
{-# LANGUAGE BangPatterns #-}
|
|
{-# LANGUAGE NoImplicitPrelude #-}
|
|
{-# LANGUAGE OverloadedStrings #-}
|
|
{-# LANGUAGE RecordWildCards #-}
|
|
{-# LANGUAGE ScopedTypeVariables #-}
|
|
|
|
module Network.IRC.Client (run) where
|
|
|
|
import qualified Data.Text.Format as TF
|
|
import qualified Data.Text.Format.Params as TF
|
|
|
|
import ClassyPrelude
|
|
import Control.Exception.Lifted
|
|
import Control.Concurrent.Lifted
|
|
import Control.Monad.Reader hiding (forM_, foldM)
|
|
import Control.Monad.State hiding (forM_, foldM)
|
|
import Network
|
|
import System.IO (hIsEOF, hSetBuffering, BufferMode(..))
|
|
import System.Timeout
|
|
|
|
import Network.IRC.Handlers
|
|
import Network.IRC.Protocol
|
|
import Network.IRC.Types
|
|
|
|
oneSec :: Int
|
|
oneSec = 1000000
|
|
|
|
debug :: Text -> IO ()
|
|
debug msg = do
|
|
time <- getCurrentTime
|
|
TF.print "[{}] {}\n" $ TF.buildParams (formatTime defaultTimeLocale "%F %T" time, msg)
|
|
|
|
type Latch = MVar ()
|
|
|
|
latchIt :: Latch -> IO ()
|
|
latchIt latch = putMVar latch ()
|
|
|
|
awaitLatch :: Latch -> IO ()
|
|
awaitLatch latch = void $ takeMVar latch
|
|
|
|
type Channel a = (Chan a, Latch)
|
|
|
|
data Line = Timeout | EOF | Line !Message deriving (Show, Eq)
|
|
|
|
sendCommand :: Chan Command -> Command -> IO ()
|
|
sendCommand = writeChan
|
|
|
|
sendMessage :: Chan Line -> Message -> IO ()
|
|
sendMessage = (. Line) . writeChan
|
|
|
|
sendEvent :: Chan SomeEvent -> SomeEvent -> IO ()
|
|
sendEvent = writeChan
|
|
|
|
readLine :: Chan Line -> IO Line
|
|
readLine = readChan
|
|
|
|
sendCommandLoop :: Channel Command -> Bot -> IO ()
|
|
sendCommandLoop (commandChan, latch) bot@Bot { .. } = do
|
|
cmd <- readChan commandChan
|
|
time <- getCurrentTime
|
|
let mline = lineFromCommand botConfig cmd
|
|
case mline of
|
|
Nothing -> return ()
|
|
Just line -> do
|
|
TF.hprint socket "{}\r\n" $ TF.Only line
|
|
TF.print "[{}] > {}\n" $ TF.buildParams (formatTime defaultTimeLocale "%F %T" time, line)
|
|
case cmd of
|
|
QuitCmd -> latchIt latch
|
|
_ -> sendCommandLoop (commandChan, latch) bot
|
|
|
|
readLineLoop :: MVar BotStatus -> Channel Line -> Bot -> Int -> IO ()
|
|
readLineLoop mvBotStatus (lineChan, latch) bot@Bot { .. } timeoutDelay = do
|
|
botStatus <- readMVar mvBotStatus
|
|
case botStatus of
|
|
Disconnected -> latchIt latch
|
|
_ -> do
|
|
mLine <- timeout timeoutDelay readLine'
|
|
case mLine of
|
|
Nothing -> writeChan lineChan Timeout
|
|
Just line -> writeChan lineChan line
|
|
readLineLoop mvBotStatus (lineChan, latch) bot timeoutDelay
|
|
where
|
|
readLine' = do
|
|
eof <- hIsEOF socket
|
|
if eof
|
|
then return EOF
|
|
else do
|
|
line <- map initEx $ hGetLine socket
|
|
debug $ "< " ++ line
|
|
now <- getCurrentTime
|
|
return . Line $ msgFromLine botConfig now line
|
|
|
|
listenerLoop :: Chan Line -> Chan Command -> Int -> IRC ()
|
|
listenerLoop lineChan commandChan !idleFor = do
|
|
status <- get
|
|
bot@Bot { .. } <- ask
|
|
let nick = botNick botConfig
|
|
|
|
nStatus <- liftIO . mask_ $
|
|
if idleFor >= (oneSec * botTimeout botConfig)
|
|
then debug "Timeout" >> return Disconnected
|
|
else do
|
|
when (status == Kicked) $
|
|
threadDelay (5 * oneSec) >> sendCommand commandChan JoinCmd
|
|
|
|
mLine <- readLine lineChan
|
|
case mLine of
|
|
Timeout -> getCurrentTime >>= dispatchHandlers bot . IdleMsg >> return Idle
|
|
EOF -> debug "Connection closed" >> return Disconnected
|
|
Line message -> do
|
|
nStatus <- case message of
|
|
JoinMsg { .. } | userNick user == nick -> debug "Joined" >> return Joined
|
|
KickMsg { .. } | kickedNick == nick -> debug "Kicked" >> return Kicked
|
|
NickInUseMsg { .. } ->
|
|
debug "Nick already in use" >> return NickNotAvailable
|
|
ModeMsg { user = Self, .. } ->
|
|
sendCommand commandChan JoinCmd >> return Connected
|
|
_ -> return Connected
|
|
|
|
dispatchHandlers bot message
|
|
return nStatus
|
|
|
|
put nStatus
|
|
case nStatus of
|
|
Idle -> listenerLoop lineChan commandChan (idleFor + oneSec)
|
|
Disconnected -> return ()
|
|
NickNotAvailable -> return ()
|
|
_ -> listenerLoop lineChan commandChan 0
|
|
|
|
where
|
|
dispatchHandlers Bot { .. } message =
|
|
forM_ (mapToList msgHandlers) $ \(_, msgHandler) -> fork $
|
|
handle (\(e :: SomeException) ->
|
|
debug $ "Exception while processing message: " ++ pack (show e)) $ do
|
|
mCmd <- handleMessage msgHandler botConfig message
|
|
case mCmd of
|
|
Nothing -> return ()
|
|
Just cmd -> sendCommand commandChan cmd
|
|
|
|
eventProcessLoop :: Channel SomeEvent -> Chan Line -> Chan Command -> Bot -> IO ()
|
|
eventProcessLoop (eventChan, latch) lineChan commandChan bot@Bot {.. } = do
|
|
event <- readChan eventChan
|
|
case fromEvent event of
|
|
Just (QuitEvent, _) -> latchIt latch
|
|
_ -> do
|
|
debug $ "Event: " ++ pack (show event)
|
|
forM_ (mapToList msgHandlers) $ \(_, msgHandler) -> fork $
|
|
handle (\(ex :: SomeException) ->
|
|
debug $ "Exception while processing event: " ++ pack (show ex)) $ do
|
|
resp <- handleEvent msgHandler botConfig event
|
|
case resp of
|
|
RespMessage message -> sendMessage lineChan message
|
|
RespCommand command -> sendCommand commandChan command
|
|
RespEvent event' -> sendEvent eventChan event'
|
|
_ -> return ()
|
|
eventProcessLoop (eventChan, latch) lineChan commandChan bot
|
|
|
|
connect :: BotConfig -> IO (Bot, MVar BotStatus, Channel Line, Channel Command, Channel SomeEvent)
|
|
connect botConfig@BotConfig { .. } = do
|
|
debug "Connecting ..."
|
|
socket <- connectToWithRetry
|
|
hSetBuffering socket LineBuffering
|
|
debug "Connected"
|
|
|
|
lineChan <- newChannel
|
|
commandChan <- newChannel
|
|
eventChan <- newChannel
|
|
mvBotStatus <- newMVar Connected
|
|
msgHandlers <- loadMsgHandlers (fst eventChan)
|
|
|
|
return (Bot botConfig socket msgHandlers, mvBotStatus, lineChan, commandChan, eventChan)
|
|
where
|
|
connectToWithRetry = connectTo (unpack server) (PortNumber (fromIntegral port))
|
|
`catch` (\(e :: SomeException) -> do
|
|
debug ("Error while connecting: " ++ pack (show e) ++ ". Waiting.")
|
|
threadDelay (5 * oneSec)
|
|
connectToWithRetry)
|
|
|
|
newChannel = (,) <$> newChan <*> newEmptyMVar
|
|
|
|
loadMsgHandlers eventChan = flip (`foldM` mempty) msgHandlerNames $ \hMap msgHandlerName -> do
|
|
debug $ "Loading msg handler: " ++ msgHandlerName
|
|
mMsgHandler <- mkMsgHandler botConfig eventChan msgHandlerName
|
|
case mMsgHandler of
|
|
Nothing -> debug ("No msg handler found with name: " ++ msgHandlerName) >> return hMap
|
|
Just msgHandler -> return $ insertMap msgHandlerName msgHandler hMap
|
|
|
|
disconnect :: (Bot, MVar BotStatus, Channel Line, Channel Command, Channel SomeEvent) -> IO ()
|
|
disconnect (Bot { .. }, mvBotStatus, (_, readLatch), (commandChan, sendLatch), (eventChan, eventLatch)) = do
|
|
debug "Disconnecting ..."
|
|
sendCommand commandChan QuitCmd
|
|
awaitLatch sendLatch
|
|
swapMVar mvBotStatus Disconnected
|
|
awaitLatch readLatch
|
|
sendEvent eventChan =<< toEvent QuitEvent
|
|
awaitLatch eventLatch
|
|
|
|
unloadMsgHandlers
|
|
hClose socket
|
|
debug "Disconnected"
|
|
where
|
|
unloadMsgHandlers = forM_ (mapToList msgHandlers) $ \(msgHandlerName, msgHandler) -> do
|
|
debug $ "Unloading msg handler: " ++ msgHandlerName
|
|
stopMsgHandler msgHandler botConfig
|
|
|
|
run :: BotConfig -> IO ()
|
|
run botConfig' = withSocketsDo $ do
|
|
hSetBuffering stdout LineBuffering
|
|
debug "Running with config:"
|
|
print botConfig
|
|
status <- run_
|
|
case status of
|
|
Disconnected -> debug "Restarting .." >> run botConfig
|
|
Errored -> debug "Restarting .." >> run botConfig
|
|
Interrupted -> return ()
|
|
NickNotAvailable -> return ()
|
|
_ -> error "Unsupported status"
|
|
where
|
|
botConfig = botConfig' { msgHandlerNames = hashNub $ msgHandlerNames botConfig' ++ coreMsgHandlerNames }
|
|
|
|
handleErrors :: SomeException -> IO BotStatus
|
|
handleErrors e = case fromException e of
|
|
Just UserInterrupt -> debug "User interrupt" >> return Interrupted
|
|
_ -> debug ("Exception! " ++ pack (show e)) >> return Errored
|
|
|
|
run_ = bracket (connect botConfig) disconnect $
|
|
\(bot, mvBotStatus, (lineChan, readLatch), (commandChan, sendLatch), eventChannel) ->
|
|
handle handleErrors $ do
|
|
sendCommand commandChan NickCmd
|
|
sendCommand commandChan UserCmd
|
|
|
|
fork $ sendCommandLoop (commandChan, sendLatch) bot
|
|
fork $ readLineLoop mvBotStatus (lineChan, readLatch) bot oneSec
|
|
fork $ eventProcessLoop eventChannel lineChan commandChan bot
|
|
runIRC bot Connected (listenerLoop lineChan commandChan 0)
|