+{-# LANGUAGE
+ Arrows
+ , OverloadedStrings
+ , TypeOperators
+ , UnicodeSyntax
+ #-}
module Rakka.Utils
( yesOrNo
+ , trueOrFalse
, parseYesOrNo
, maybeA
, deleteIfEmpty
, chomp
+ , guessMIMEType
+ , isSafeChar
+ , mkQueryString
)
where
+import Control.Arrow
+import Control.Arrow.ArrowList
+import Data.ByteString (ByteString)
+import qualified Data.ByteString as BS
+import qualified Data.ByteString.Char8 as C8
+import qualified Data.ByteString.Lazy as LS
+import qualified Data.ByteString.Unsafe as BS
+import Data.Char
+import Data.Monoid.Unicode
+import Data.String
+import Data.Text (Text)
+import Data.Text.Encoding
+import Magic
+import Network.HTTP.Lucu
+import Network.URI
+import Numeric
+import Prelude.Unicode
+import System.IO.Unsafe
-import Control.Arrow
-import Control.Arrow.ArrowList
-
-
-yesOrNo :: Bool -> String
+yesOrNo ∷ Bool → String
yesOrNo True = "yes"
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
- "yes" -> returnA -< True
- "no" -> returnA -< False
- _ -> returnA -< error ("Expected yes or no: " ++ str)
-
+parseYesOrNo ∷ (Eq s, Show s, IsString s, ArrowChoice (⇝)) ⇒ s ⇝ Bool
+parseYesOrNo = arr f
+ where
+ f "yes" = True
+ f "no" = False
+ f str = error ("Expected yes or no: " ⊕ show str)
-maybeA :: (ArrowList a, ArrowChoice a) => a b c -> a b (Maybe c)
+maybeA ∷ (ArrowList a, ArrowChoice a) ⇒ a b c → a b (Maybe c)
maybeA a = listA a
>>>
- proc xs -> case xs of
- [] -> returnA -< Nothing
- (x:_) -> returnA -< Just x
+ proc xs → case xs of
+ [] → returnA ⤙ Nothing
+ (x:_) → returnA ⤙ Just x
-
-deleteIfEmpty :: (ArrowList a, ArrowChoice a) => a String String
+deleteIfEmpty ∷ (ArrowList a, ArrowChoice a) ⇒ a String String
deleteIfEmpty
- = proc str -> do case str of
- "" -> none -< ()
- _ -> returnA -< str
+ = proc str → do case str of
+ "" → none ⤙ ()
+ _ → returnA ⤙ str
+
+chomp ∷ String → String
+{-# INLINE chomp #-}
+chomp = reverse . snd . break (≢ '\n') . reverse
+
+guessMIMEType ∷ LS.ByteString → MIMEType
+{-# INLINEABLE guessMIMEType #-}
+guessMIMEType = read
+ ∘ unsafePerformIO
+ ∘ flip BS.unsafeUseAsCStringLen (magicCString magic)
+ ∘ BS.concat
+ ∘ LS.toChunks
+ where
+ magic ∷ Magic
+ {-# NOINLINE magic #-}
+ magic = unsafePerformIO
+ $ do m ← magicOpen [MagicMime]
+ magicLoadDefault m
+ return m
+
+isSafeChar ∷ Char → Bool
+{-# INLINEABLE isSafeChar #-}
+isSafeChar c
+ | c ≡ '/' = True
+ | isReserved c = False
+ | c > ' ' ∧ c ≤ '~' = True
+ | otherwise = False
+
+mkQueryString ∷ [(Text, Text)] → ByteString
+{-# INLINEABLE mkQueryString #-}
+mkQueryString = BS.intercalate (C8.singleton ';') ∘ map encodePair
+ where
+ encodePair ∷ (Text, Text) → ByteString
+ {-# INLINE encodePair #-}
+ encodePair (k, v)
+ = BS.intercalate (C8.singleton '=') [encodeText k, encodeText v]
+
+ encodeText ∷ Text → ByteString
+ {-# INLINE encodeText #-}
+ encodeText = toURLEncoded ∘ encodeUtf8
+
+toURLEncoded ∷ ByteString → ByteString
+{-# INLINEABLE toURLEncoded #-}
+toURLEncoded = C8.concatMap go
+ where
+ go ∷ Char → ByteString
+ {-# INLINE go #-}
+ go c | c ≡ ' ' = C8.singleton '+'
+ | isReserved c = urlEncode c
+ | isUnreserved c = C8.singleton c
+ | otherwise = urlEncode c
+
+ urlEncode ∷ Char → ByteString
+ {-# INLINE urlEncode #-}
+ urlEncode c = C8.pack ('%':toHex (ord c))
+ toHex ∷ Int → String
+ {-# INLINE toHex #-}
+ toHex n
+ = case showIntAtBase 16 toChrHex n "" of
+ [] → "00"
+ [c] → ['0', c]
+ cs → cs
-chomp :: String -> String
-chomp = reverse . snd . break (/= '\n') . reverse
+ toChrHex ∷ Int → Char
+ {-# INLINE toChrHex #-}
+ toChrHex d
+ | d < 10 = chr (ord '0' + fromIntegral d )
+ | otherwise = chr (ord 'A' + fromIntegral (d-10))