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|
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
module Reaktor
( module Exports
, privmsg
, run
) where
import Blessings.Text
import Control.Concurrent.Extended
import Control.Exception
import Control.Monad (forM_)
import Data.Attoparsec.Text (feed,parse)
import Data.Attoparsec.Text (IResult(Done,Fail,Partial))
import Data.ByteString (ByteString)
import qualified Data.ByteString.Char8.Extended as BS
import qualified Data.Char as C
import Data.Function (on)
import qualified Data.Text.Encoding as T
import qualified Data.Text.Extended as T
import qualified Data.Text.IO as T
import Data.Time.Clock.System
import Data.Time.Format
import qualified Network.Simple.TCP as TCP
import qualified Network.Simple.TCP.TLS as TLS
import Network.Socket as Exports (HostName,ServiceName)
import Prelude.Extended
import Reaktor.Internal
import Reaktor.Internal as Exports (Actions(..))
import Reaktor.Internal as Exports (Message(Message,Start))
import Reaktor.IRC as Exports
import Reaktor.Internal as Exports (formatMessage)
import Reaktor.Nick as Exports
import Reaktor.Nick as Nick
import qualified Reaktor.Parser as Parser
import qualified System.IO
import System.IO (BufferMode(LineBuffering),hSetBuffering)
import System.IO (hIsTerminalDevice)
import System.Posix.Signals
run :: Config -> (Actions -> IO [Message -> IO ()]) -> IO ()
run Config{..} getPlugins =
if cUseTLS then do
s <- TLS.getDefaultClientSettings (cHostName, BS.pack cServiceName)
TLS.connect s cHostName cServiceName $ \(ctx, sockAddr) ->
withSocket sockAddr (TLS.send ctx) (TLS.recv ctx)
else do
TCP.connect cHostName cServiceName $ \(sock, sockAddr) ->
withSocket sockAddr (TCP.send sock) (TCP.recv sock 512)
where
withSocket _sockAddr sockSend sockRecv = do
hSetBuffering cLogHandle LineBuffering -- TODO reset
logToTTY <- hIsTerminalDevice cLogHandle
(putLog, takeLog0) <- newChan
let
takeLog1 = if cLogTime then takeLog0 >>= prefixTimestamp else takeLog0
takeLog2 = showUnprintable <$> takeLog1
takeLog3 = if logToTTY then takeLog2 else stripSGR <$> takeLog2
takeLog = takeLog3
(putInMsg, takeInMsg) <- newChan
(putOutMsg, takeOutMsg) <- newChan
(shutdown, awaitShutdown) <- newSemaphore
(aSetNick,aGetNick) <- newRef =<< maybe Nick.getRandom return cNick
let actions = Actions{..}
aIsSecure = cUseTLS
aLog = putLog
aSend msg = logMsg msg >> putOutMsg msg
logMsg msg =
forM_ (logMsgFilter msg) $ \msg' -> do
let bs = formatMessage msg'
aLog $ SGR [38,5,235] "> " <> SGR [35,1] (Plain bs)
mapM_ (\(s, f) -> installHandler s (Catch f) Nothing) [
(sigINT, shutdown)
]
plugins <- getPlugins actions
threads <- mapM (\f -> forkIO $ f `finally` shutdown) [
receiver actions putInMsg sockRecv,
logger cLogHandle takeLog,
pinger aSend,
sender cSendDelay takeOutMsg sockSend,
splitter plugins takeInMsg
]
putInMsg Start
awaitShutdown
mapM_ killThread threads
putStrLn ""
logger :: System.IO.Handle -> IO (Blessings Text) -> IO ()
logger h takeLog = forever $ takeLog >>= T.hPutStrLn h . pp
pinger :: (Message -> IO ()) -> IO ()
pinger aSend = forever $ do
threadDelay time
aSend (Message Nothing PING ["heartbeat"])
where
time = 300 * 1000000
receiver :: Actions -> (Message -> IO ()) -> IO (Maybe ByteString) -> IO ()
receiver Actions{..} putInMsg sockRecv =
receive ""
where
decode :: ByteString -> Text
decode = T.decodeUtf8With (\_err _c -> Just '?')
receive :: Text -> IO ()
receive "" =
sockRecv >>= \case
Nothing -> logErr "EOL"
Just buf -> receive (decode buf)
receive buf =
go (parse Parser.message buf)
where
go :: IResult Text Message -> IO ()
go = \case
Done rest msg -> do
logMsg msg
putInMsg msg
receive rest
p@(Partial _) ->
sockRecv >>= \case
Nothing -> logErr ("EOF with partial " <> Plain (T.show p))
Just buf' -> go (feed p (decode buf'))
f@(Fail _i _errorContexts _errMessage) ->
logErr ("failed to parse message: " <> Plain (T.show f))
logErr s = aLog $ SGR [31,1] ("! receive: " <> s)
logMsg msg =
forM_ (logMsgFilter msg) $ \msg' -> do
let bs = formatMessage msg'
aLog $ SGR [38,5,235] "< " <> SGR [38,5,244] (Plain bs)
sender :: Maybe Int -> IO Message -> (ByteString -> IO ()) -> IO ()
sender cSendDelay takeOutMsg sockSend =
forever send
where
send = maybe send0 ((send0 >>) . threadDelay) cSendDelay
send0 = takeOutMsg >>= sockSend . T.encodeUtf8 . formatMessage
splitter :: [Message -> IO ()] -> IO Message -> IO ()
splitter plugins takeInMsg =
forever $ do
msg <- takeInMsg
mapM_ (\f -> forkIO (f msg)) plugins
logMsgFilter :: Message -> Maybe Message
logMsgFilter = \case
Message _ PING _ -> Nothing
Message _ PONG _ -> Nothing
Message p PRIVMSG ["NickServ",xs] | check -> do
Just (Message p PRIVMSG ["NickServ",xs'])
where
check = elem cmd ["IDENTIFY","REGAIN"] && length ws > 2
ws = T.words xs
(cmd:ws') = ws
(nick:_) = ws'
xs' = T.unwords [cmd, nick, "<password>"]
msg -> Just msg
showUnprintable :: Blessings Text -> Blessings Text
showUnprintable =
fmap' showU
where
showU :: Text -> Blessings Text
showU =
mconcat
. map (either Plain (hi . Plain . showLitChars))
. toEither (not . C.isPrint)
-- like Blessings' fmap, but don't wrap the Plain case in another Plain
fmap' :: (Text -> Blessings Text) -> Blessings Text -> Blessings Text
fmap' f = \case
Append t1 t2 -> Append (fmap' f t1) (fmap' f t2)
Plain s -> f s
SGR pm t -> SGR pm (fmap' f t)
Empty -> Empty
hi = SGR [38,5,79]
showLitChars :: Text -> Text
showLitChars = T.concatMap (T.pack . flip C.showLitChar "")
toEither :: (Char -> Bool) -> Text -> [Either Text Text]
toEither p =
map (\s -> if p (T.head s) then Right s else Left s)
. T.groupBy ((==) `on` p)
privmsg :: Text -> [Text] -> Message
privmsg msgtarget xs =
Message Nothing PRIVMSG (msgtarget:T.intercalate " " xs:[])
prefixTimestamp :: Blessings Text -> IO (Blessings Text)
prefixTimestamp s = do
t <- SGR [38,5,239] . Plain . T.pack <$> getTimestamp
return (t <> " " <> s)
getTimestamp :: IO String
getTimestamp =
formatTime defaultTimeLocale (iso8601DateFormat $ Just "%H:%M:%SZ")
. systemToUTCTime <$> getSystemTime
|
