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module Output (
Output, OutputType(..),
MonadOutput(..),
startOutput,
outLine,
outPromptGetLine,
outPromptGetLineCompletion,
) where
import Control.Concurrent.MVar
import Control.Monad.IO.Class
import Control.Monad.Reader
import Data.Text (Text)
import Data.Text qualified as T
import Data.Text.Lazy qualified as TL
import Data.Text.Lazy.IO qualified as TL
import System.Console.Haskeline
import System.Console.Haskeline.History
data Output = Output
{ outState :: MVar OutputState
, outConfig :: OutputConfig
}
data OutputConfig = OutputConfig
{ outVerbose :: Bool
}
data OutputState = OutputState
{ outPrint :: TL.Text -> IO ()
, outHistory :: History
}
data OutputType = OutputChildStdout
| OutputChildStderr
| OutputChildStdin
| OutputChildInfo
| OutputChildFail
| OutputMatch
| OutputMatchFail
| OutputError
| OutputAlways
class MonadIO m => MonadOutput m where
getOutput :: m Output
instance MonadIO m => MonadOutput (ReaderT Output m) where
getOutput = ask
startOutput :: Bool -> IO Output
startOutput verbose = Output
<$> newMVar OutputState { outPrint = TL.putStrLn, outHistory = emptyHistory }
<*> pure OutputConfig { outVerbose = verbose }
outColor :: OutputType -> Text
outColor OutputChildStdout = T.pack "0"
outColor OutputChildStderr = T.pack "31"
outColor OutputChildStdin = T.pack "0"
outColor OutputChildInfo = T.pack "0"
outColor OutputChildFail = T.pack "31"
outColor OutputMatch = T.pack "32"
outColor OutputMatchFail = T.pack "31"
outColor OutputError = T.pack "31"
outColor OutputAlways = "0"
outSign :: OutputType -> Text
outSign OutputChildStdout = T.empty
outSign OutputChildStderr = T.pack "!"
outSign OutputChildStdin = T.empty
outSign OutputChildInfo = T.pack "."
outSign OutputChildFail = T.pack "!!"
outSign OutputMatch = T.pack "+"
outSign OutputMatchFail = T.pack "/"
outSign OutputError = T.pack "!!"
outSign OutputAlways = T.empty
outArr :: OutputType -> Text
outArr OutputChildStdin = "<"
outArr _ = ">"
printWhenQuiet :: OutputType -> Bool
printWhenQuiet = \case
OutputChildStderr -> True
OutputChildFail -> True
OutputMatchFail -> True
OutputError -> True
OutputAlways -> True
_ -> False
ioWithOutput :: MonadOutput m => (Output -> IO a) -> m a
ioWithOutput act = liftIO . act =<< getOutput
outLine :: MonadOutput m => OutputType -> Maybe Text -> Text -> m ()
outLine otype prompt line = ioWithOutput $ \out ->
when (outVerbose (outConfig out) || printWhenQuiet otype) $ do
withMVar (outState out) $ \st -> do
outPrint st $ TL.fromChunks
[ T.pack "\ESC[", outColor otype, T.pack "m"
, maybe "" (<> outSign otype <> outArr otype <> " ") prompt
, line
, T.pack "\ESC[0m"
]
outPromptGetLine :: MonadOutput m => Text -> m (Maybe Text)
outPromptGetLine = outPromptGetLineCompletion noCompletion
outPromptGetLineCompletion :: MonadOutput m => CompletionFunc IO -> Text -> m (Maybe Text)
outPromptGetLineCompletion compl prompt = ioWithOutput $ \out -> do
st <- takeMVar (outState out)
(x, st') <- runInputT (setComplete compl defaultSettings) $ do
p <- getExternalPrint
putHistory $ outHistory st
liftIO $ putMVar (outState out) st { outPrint = p . TL.unpack . (<>"\n") }
x <- getInputLine $ T.unpack prompt
st' <- liftIO $ takeMVar (outState out)
hist' <- getHistory
return (x, st' { outPrint = outPrint st, outHistory = hist' })
putMVar (outState out) st'
return $ fmap T.pack x
|