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{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE MultiWayIf #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
module Reaktor.Plugins.System (new) where
--import Prelude.Extended
import Blessings
import Control.Applicative
import Control.Concurrent (forkIO)
import Control.Exception (finally)
--import Data.Aeson
import Data.ByteString.Char8.Extended (ByteString)
import qualified Data.ByteString.Char8.Extended as BS
import qualified Data.Map as M
import Reaktor
import System.Environment (getEnvironment)
import System.FilePath.Posix (takeBaseName)
import System.IO (BufferMode(LineBuffering),hSetBuffering)
import System.IO (Handle,hClose,hPutStr,hIsEOF)
import Reaktor.Plugins.System.Internal -- TODO rename to Reaktor.Plugins.System again
import System.Process (StdStream(CreatePipe),waitForProcess)
import System.Process (createProcess,CreateProcess(..),proc)
import qualified Text.Regex.PCRE.Heavy as RE
import qualified Text.Regex.PCRE.Light as RE
new :: Config -> Actions -> IO (Message -> IO ())
new config@Config{..} actions@Actions{..} = do
pure $ \case
Message (Just prefix) "PRIVMSG" (msgtarget:text:[]) -> do
nick_ <- aGetNick
let hs = maybe [] id (M.lookup "PRIVMSG" cHooks)
mapM_ (\h -> run1 config actions nick_ h prefix msgtarget text) hs
Message (Just prefix) "JOIN" (channel:[]) -> do
nick_ <- aGetNick
let hs = maybe [] id (M.lookup "JOIN" cHooks)
mapM_ (\h -> run1 config actions nick_ h prefix channel "") hs
_ -> pure ()
run1 :: Config -> Actions -> ByteString -> SystemParams -> ByteString -> ByteString -> ByteString -> IO ()
run1 config@Config{..} actions@Actions{..} nick_ params prefix msgtarget text = do
let
isActivated =
case activate params of
Always -> Just ""
Match ->
case pattern params of
Nothing -> Nothing
Just pat ->
let
result = RE.scan patternRE text
patternRE = RE.compile pat []
in
if null result
then Nothing
else Just ""
Query ->
if
| BS.isPrefixOf (nick_ <> ":") text ->
Just (nick_ <> ":")
| BS.isPrefixOf "*:" text ->
Just "*:"
| isQuery ->
Just ""
| otherwise ->
Nothing
audience = if isQuery then from else msgtarget
-- TODO check if msgtarget is one of our channels?
-- what if our nick has changed?
isQuery = msgtarget == nick_
from = BS.takeWhile (/='!') prefix
--maybe prefix (flip BS.take prefix) $ BS.findIndex (=='!') prefix
case isActivated of
Just trigger -> do
let cmdline = BS.dropWhile (==' ') $ BS.drop (BS.length trigger) text
resultPrefix = if isQuery then [] else [from <> ":"]
parseCommandLine' pat s =
if null result then [] else snd (head result)
where
result = RE.scan patternRE s
patternRE = RE.compile pat []
parse' =
case pattern params of
Nothing -> [] -- TODO everything
Just pat -> parseCommandLine' pat cmdline
headMaybe x = if null x then Nothing else Just (head x)
-- TODO rename "command" to something like "commandSpec"
command' = case command params of
Capture i ->
case headMaybe (drop (fromIntegral i - 1) parse') of
Nothing -> Nothing
Just k -> M.lookup k (commands params)
CaptureOr c -> Just c
cmdName = case command params of
Capture i ->
case headMaybe (drop (fromIntegral i - 1) parse') of
Nothing -> "<CMDERP>"
Just k -> k
CaptureOr c -> BS.pack (takeBaseName $ commandPath c)
args' =
map BS.unpack $
map (maybe "" id) $
reverse $
dropWhile (==Nothing) $
reverse $
map f (arguments params)
where
f arg = case arg of
Capture i ->
case headMaybe (drop (fromIntegral i - 1) parse') of
Nothing -> Nothing
Just k -> Just k
CaptureOr x -> Just x
case command' of
Just c -> do
-- aSend <- gets s_sendMsg
-- putLog_ <- gets s_putLog
let onErrLine s =
aLog $ SGR [31,1] $
Plain (BS.pack (takeBaseName $ commandPath c) <> ": "<> s)
onOutLine s =
aSend (privmsg audience [s])
extraEnv = [("_prefix", BS.unpack prefix),
("_from", BS.unpack from)]
fork config actions c args' (Just extraEnv) "" onOutLine onErrLine
Nothing -> do
aSend (privmsg audience (resultPrefix <> [cmdName <> ": command not found"]))
Nothing -> return ()
fork :: Config
-> Actions
-> SystemCommand
-> [String]
-> Maybe [(String, String)]
-> String
-> (ByteString -> IO ())
-> (ByteString -> IO ())
-> IO ()
fork Config{..} Actions{..} cmd args extraEnv input onOutLine onErrLine = do
baseEnv <- getEnvironment
let procEnv = M.toList $ mconcat [
maybe mempty M.fromList extraEnv,
maybe mempty id (commandEnv cmd),
M.fromList baseEnv
]
(inh, outh, errh) <- do
(Just inh, Just outh, Just errh, ph) <-
createProcess (proc (commandPath cmd) args) {
cwd = commandWorkDir cmd <|> cDefaultWorkDir,
env = Just procEnv,
std_in = CreatePipe,
std_out = CreatePipe,
std_err = CreatePipe,
close_fds = True,
create_group = True,
new_session = True
}
_ <- forkIO $ waitForProcess ph >> return ()
return (inh, outh, errh)
mapM_ forkIO [
hPutStr inh input `finally` hClose inh,
hWithLines outh onOutLine,
hWithLines errh onErrLine
]
hWithLines :: Handle -> (ByteString -> IO ()) -> IO ()
hWithLines h f = do
hSetBuffering h LineBuffering
go `finally` hClose h
where
go =
hIsEOF h >>= \case
True -> return ()
False -> BS.hGetLine h >>= f >> go
|
