module Lib.Util where

import System.IO

interactl :: String -> (String -> String) -> IO ()
interactl p f = do
    putStr p
    hFlush stdout
    ls <- getContents
    i' p f (lines ls)

i' :: String -> (t -> String) -> [t] -> IO ()
i' _ _ [] = return ()
i' p f (l:ls) = do
    putStr (f l)
    putStr p
    hFlush stdout
    i' p f ls