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|
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
module Reaktor
( module Exports
, privmsg
, run
) where
import Blessings
import Control.Concurrent.Extended
import Control.Exception
import Data.Attoparsec.ByteString.Char8
import Data.ByteString (ByteString)
import qualified Data.ByteString.Char8 as BS
import Data.Foldable (toList)
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.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 = if logToTTY then takeLog1 else stripSGR <$> takeLog1
takeLog = takeLog2
(putInMsg, takeInMsg) <- newChan
(putOutMsg, takeOutMsg) <- newChan
(shutdown, awaitShutdown) <- newSemaphore
(aSetNick,aGetNick) <- newRef =<< maybe Nick.getRandom return cNick
let actions = Actions{..}
aIsSecure = cUseTLS
aLog = putLog
aLogMsg msg = do
let bs = formatMessage msg
putLog $ SGR [38,5,235] "> " <> SGR [35,1] (Plain bs)
aSendQuiet = putOutMsg
aSend msg = aLogMsg msg >> aSendQuiet msg
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 takeOutMsg sockSend,
splitter plugins takeInMsg
]
putInMsg Start
awaitShutdown
mapM_ killThread threads
putStrLn ""
logger :: System.IO.Handle -> IO (Blessings ByteString) -> IO ()
logger h takeLog = forever $ do
s <- takeLog
let s' = if lastChar s == '\n' then s else s <> Plain "\n"
System.IO.hPutStr h $ pp $ fmap BS.unpack s'
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
receive "" =
sockRecv >>= \case
Nothing -> do
aLog $ SGR [34,1] (Plain "# EOL")
Just buf -> receive buf
receive buf =
go (parse Parser.message buf)
where
go :: IResult ByteString Message -> IO ()
go = \case
Done rest msg -> do
-- TODO log message only if h hasn't disabled logging for it
let bs = formatMessage msg
aLog $ SGR [38,5,235] "< " <> SGR [38,5,244] (Plain bs)
putInMsg msg
receive rest
p@(Partial _) -> do
sockRecv >>= \case
Nothing -> do
aLog $ SGR [31] (Plain "EOF")
Just msg ->
go (feed p msg)
f@(Fail _i _errorContexts _errMessage) -> do
aLog $ SGR [31,1] (Plain (BS.pack $ show f))
sender :: IO Message -> (ByteString -> IO ()) -> IO ()
sender takeOutMsg sockSend =
forever $ takeOutMsg >>= sockSend . formatMessage
splitter :: [Message -> IO ()] -> IO Message -> IO ()
splitter plugins takeInMsg =
forever $ do
msg <- takeInMsg
mapM_ (\f -> forkIO (f msg)) plugins
privmsg :: ByteString -> [ByteString] -> Message
privmsg msgtarget xs =
Message Nothing "PRIVMSG" (msgtarget:BS.intercalate " " xs:[])
lastChar :: Blessings ByteString -> Char
lastChar = BS.last . last . toList
prefixTimestamp :: Blessings ByteString -> IO (Blessings ByteString)
prefixTimestamp s = do
t <- SGR [38,5,239] . Plain . BS.pack <$> getTimestamp
return (t <> " " <> s)
stripSGR :: Blessings a -> Blessings a
stripSGR = \case
Append t1 t2 -> Append (stripSGR t1) (stripSGR t2)
SGR _ t -> stripSGR t
Plain x -> Plain x
Empty -> Empty
getTimestamp :: IO String
getTimestamp =
formatTime defaultTimeLocale (iso8601DateFormat $ Just "%H:%M:%SZ")
. systemToUTCTime <$> getSystemTime
|
