Fixing build breakage...

[Rakka.git] / Rakka / Utils.hs

diff --git a/Rakka/Utils.hs b/Rakka/Utils.hs
index cb77474553c42fee4f6cdcaf340a32a8db4e38a9..9cc06984440e09a9d7afe2ec12411f550d1a1f56 100644 (file)
--- a/Rakka/Utils.hs
+++ b/Rakka/Utils.hs
@@ -1,40 +1,98 @@
+{-# LANGUAGE
+    Arrows
+  , UnicodeSyntax
+  #-}
 module Rakka.Utils
-    ( parseYesOrNo
+    ( yesOrNo
+    , trueOrFalse
+    , parseYesOrNo
     , maybeA
-    , defaultTo
     , deleteIfEmpty
+    , chomp
+    , guessMIMEType
+    , isSafeChar
+    , mkQueryString
     )
     where
+import qualified Codec.Binary.Url as Url
+import Control.Arrow
+import Control.Arrow.ArrowList
+import qualified Data.ByteString as BS
+import qualified Data.ByteString.Lazy as LS
+import qualified Data.ByteString.Lazy.Char8 as L8
+import Data.List
+import qualified Data.Text as T
+import Data.Text.Encoding
+import Network.HTTP.Lucu
+import Network.URI
+import Prelude.Unicode
+import System.IO.Unsafe
 
-import           Control.Arrow
-import           Control.Arrow.ArrowList
 
+yesOrNo ∷ Bool → String
+yesOrNo True  = "yes"
+yesOrNo False = "no"
 
-parseYesOrNo :: ArrowChoice a => a String Bool
+
+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)
+    = proc str → do case str of
+                       "yes" → returnA -< True
+                       "no"  → returnA -< False
+                       _     → returnA -< error ("Expected yes or no: " ⧺ 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
 
 
-defaultTo :: ArrowChoice a => b -> a (Maybe b) b
-defaultTo def
-    = proc m -> case m of
-                  Nothing -> returnA -< def
-                  Just x  -> returnA -< x
+deleteIfEmpty ∷ (ArrowList a, ArrowChoice a) => a String String
+deleteIfEmpty
+    = proc str → do case str of
+                       "" → none    -< ()
+                       _  → returnA -< str
 
 
-deleteIfEmpty :: (ArrowList a, ArrowChoice a) => a String String
-deleteIfEmpty
-    = proc str -> do case str of
-                       "" -> none    -< ()
-                       _  -> returnA -< str
\ No newline at end of file
+chomp ∷ String → String
+chomp = reverse . snd . break (/= '\n') . reverse
+
+
+guessMIMEType ∷ LS.ByteString → MIMEType
+guessMIMEType = read . unsafePerformIO . magicString magic . L8.unpack
+    where
+      magic ∷ Magic
+      magic = unsafePerformIO
+              $ do m <- magicOpen [MagicMime]
+                   magicLoadDefault m
+                   return m
+
+
+isSafeChar ∷ Char → Bool
+isSafeChar c
+    | c ≡ '/'           = True
+    | isReserved c      = False
+    | isUnreserved c    = True
+    | otherwise         = False
+
+
+mkQueryString ∷ [(T.Text, T.Text)] → String
+{-# INLINEABLE mkQueryString #-}
+mkQueryString = intercalate ";" ∘ map pairToStr
+    where
+      pairToStr ∷ (T.Text, T.Text) → String
+      {-# INLINE pairToStr #-}
+      pairToStr (k, v)
+          = encode k ⧺ ('=':encode v)
+
+      encode ∷ T.Text → String
+      {-# INLINE encode #-}
+      encode = Url.encode ∘ BS.unpack ∘ encodeUtf8