module Rakka.Utils
( yesOrNo
+ , trueOrFalse
, parseYesOrNo
, maybeA
, deleteIfEmpty
, chomp
+ , guessMIMEType
)
where
import Control.Arrow
import Control.Arrow.ArrowList
+import qualified Data.ByteString.Lazy as Lazy (ByteString)
+import qualified Data.ByteString.Lazy.Char8 as L8 hiding (ByteString)
+import Magic
+import Network.HTTP.Lucu
+import System.IO.Unsafe
yesOrNo :: Bool -> String
yesOrNo False = "no"
+trueOrFalse :: Bool -> String
+trueOrFalse True = "true"
+trueOrFalse False = "false"
+
+
parseYesOrNo :: ArrowChoice a => a String Bool
parseYesOrNo
= proc str -> do case str of
chomp :: String -> String
chomp = reverse . snd . break (/= '\n') . reverse
+
+
+guessMIMEType :: Lazy.ByteString -> MIMEType
+guessMIMEType = read . unsafePerformIO . magicString magic . L8.unpack
+ where
+ magic :: Magic
+ magic = unsafePerformIO
+ $ do m <- magicOpen [MagicMime]
+ magicLoadDefault m
+ return m