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#!/usr/bin/runhaskell
main = interact $ unlines . propellorLines . lines
propellorLines :: [String] -> [String]
propellorLines (x:xs) = ("[ " ++ wrapEscapeLine x) : propellorLines' xs
propellorLines' :: [String] -> [String]
propellorLines' = foldr step ["]"]
where
step x xs = (", " ++ wrapEscapeLine x) : xs
wrapEscapeLine :: String -> String
wrapEscapeLine line = "\"" ++ (foldr step "" line) ++ "\""
where
step x xs
| x == '\t' = "\\t" ++ xs
| x == '\\' = x : x : xs
| x == '"' = '\\' : x : xs
| otherwise = x : xs
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