Destroy Data.Attoparsec.Parsable; use Data.Default instead

[Lucu.git] / Network / HTTP / Lucu / MIMEType.hs

diff --git a/Network/HTTP/Lucu/MIMEType.hs b/Network/HTTP/Lucu/MIMEType.hs
index 1aebc9f56b1233b34a75384d6a45db7441125b7c..768b4cf53d3227c1ff1fde966755acfa23eef780 100644 (file)
--- a/Network/HTTP/Lucu/MIMEType.hs
+++ b/Network/HTTP/Lucu/MIMEType.hs
@@ -1,79 +1,121 @@
 {-# LANGUAGE
-    OverloadedStrings
+    DeriveDataTypeable
+  , FlexibleInstances
+  , MultiParamTypeClasses
+  , OverloadedStrings
+  , RecordWildCards
+  , TemplateHaskell
+  , TypeSynonymInstances
   , UnicodeSyntax
+  , ViewPatterns
   #-}
-
--- |MIME Types
+-- |Parsing and printing MIME Media Types
+-- (<http://tools.ietf.org/html/rfc2046>).
 module Network.HTTP.Lucu.MIMEType
     ( MIMEType(..)
-    , mkMIMEType
-
-    , parseMIMEType
-    , printMIMEType
-
     , mimeType
-    , mimeTypeList
     )
     where
 import Control.Applicative
+import Control.Monad.Unicode
 import Data.Ascii (Ascii, AsciiBuilder, CIAscii)
-import qualified Data.Ascii as A
-import Data.Attoparsec.Char8 as P
-import Data.Map (Map)
+import Data.Attempt
+import Data.Attoparsec.Char8
+import Data.Convertible.Base
+import Data.Convertible.Instances.Ascii ()
+import Data.Convertible.Utils
+import Data.Default
 import Data.Monoid.Unicode
-import Data.Text (Text)
+import Data.Typeable
+import Language.Haskell.TH.Syntax
+import Language.Haskell.TH.Quote
+import Network.HTTP.Lucu.MIMEParams
+import Network.HTTP.Lucu.OrphanInstances ()
 import Network.HTTP.Lucu.Parser
 import Network.HTTP.Lucu.Parser.Http
-import Network.HTTP.Lucu.RFC2231
-import Prelude hiding (min)
+import Network.HTTP.Lucu.Utils
 import Prelude.Unicode
 
--- |@'MIMEType' \"major\" \"minor\" [(\"name\", \"value\"), ...]@
--- represents \"major\/minor; name=value; ...\".
-data MIMEType = MIMEType {
-      mtMajor  ∷ !CIAscii
-    , mtMinor  ∷ !CIAscii
-    , mtParams ∷ !(Map CIAscii Text)
-    } deriving (Eq)
+-- |A media type, subtype, and parameters.
+data MIMEType
+    = MIMEType {
+        mtMedia  ∷ !CIAscii
+      , mtSub    ∷ !CIAscii
+      , mtParams ∷ !MIMEParams
+      }
+    deriving (Eq, Show, Read, Typeable)
+
+instance Lift MIMEType where
+    lift (MIMEType {..})
+        = [| MIMEType {
+               mtMedia  = $(lift mtMedia )
+             , mtSub    = $(lift mtSub   )
+             , mtParams = $(lift mtParams)
+             }
+           |]
 
-instance Show MIMEType where
-    show = A.toString ∘ A.fromAsciiBuilder ∘ printMIMEType
+instance ConvertSuccess MIMEType Ascii where
+    {-# INLINE convertSuccess #-}
+    convertSuccess = convertSuccessVia ((⊥) ∷ AsciiBuilder)
 
--- |@'mkMIMEType' major minor@ returns a 'MIMEType' with the given
--- @major@ and @minor@ types but without any parameters.
-mkMIMEType ∷ CIAscii → CIAscii → MIMEType
-{-# INLINE mkMIMEType #-}
-mkMIMEType maj min
-    = MIMEType maj min (∅)
+instance ConvertSuccess MIMEType AsciiBuilder where
+    {-# INLINEABLE convertSuccess #-}
+    convertSuccess (MIMEType {..})
+        = cs mtMedia       ⊕
+          cs ("/" ∷ Ascii) ⊕
+          cs mtSub         ⊕
+          cs mtParams
 
--- |Convert a 'MIMEType' to an 'AsciiBuilder'.
-printMIMEType ∷ MIMEType → AsciiBuilder
-{-# INLINEABLE printMIMEType #-}
-printMIMEType (MIMEType maj min params)
-    = A.toAsciiBuilder (A.fromCIAscii maj) ⊕
-      A.toAsciiBuilder "/" ⊕
-      A.toAsciiBuilder (A.fromCIAscii min) ⊕
-      printMIMEParams params
+deriveAttempts [ ([t| MIMEType |], [t| Ascii        |])
+               , ([t| MIMEType |], [t| AsciiBuilder |])
+               ]
 
--- |Parse 'MIMEType' from an 'Ascii'. This function throws an
--- exception for parse error.
-parseMIMEType ∷ Ascii → MIMEType
-{-# INLINEABLE parseMIMEType #-}
-parseMIMEType str
-    = case parseOnly (finishOff mimeType) $ A.toByteString str of
-        Right  t → t
-        Left err → error ("unparsable MIME Type: " ⧺ A.toString str ⧺ ": " ⧺ err)
+-- |Parse 'MIMEType' from an 'Ascii'. For MIME type literals, consider
+-- using 'mimeType' quasi-quoter.
+instance ConvertAttempt Ascii MIMEType where
+    {-# INLINEABLE convertAttempt #-}
+    convertAttempt str
+        = case parseOnly (finishOff def) (cs str) of
+            Right  t → return t
+            Left err → fail ("Unparsable MIME Type: " ⧺ cs str ⧺ ": " ⧺ err)
+
+instance Default (Parser MIMEType) where
+    {-# INLINEABLE def #-}
+    def = do media  ← cs <$> token
+             _      ← char '/'
+             sub    ← cs <$> token
+             params ← def
+             return $ MIMEType media sub params
+
+instance Default (Parser [MIMEType]) where
+    {-# INLINE def #-}
+    def = listOf def
+
+-- |'QuasiQuoter' for 'MIMEType' literals.
+--
+-- @
+--   textPlain :: 'MIMEType'
+--   textPlain = ['mimeType'| text/plain; charset=\"UTF-8\" |]
+-- @
+mimeType ∷ QuasiQuoter
+mimeType = QuasiQuoter {
+             quoteExp  = (lift =≪) ∘ (parseType =≪) ∘ toAscii
+           , quotePat  = const unsupported
+           , quoteType = const unsupported
+           , quoteDec  = const unsupported
+           }
+    where
+      parseType ∷ Monad m ⇒ Ascii → m MIMEType
+      parseType a
+          = case ca a of
+              Success t → return t
+              Failure e → fail (show e)
 
--- |'Parser' for an 'MIMEType'.
-mimeType ∷ Parser MIMEType
-{-# INLINEABLE mimeType #-}
-mimeType = do maj    ← A.toCIAscii <$> token
-              _      ← char '/'
-              min    ← A.toCIAscii <$> token
-              params ← mimeParams
-              return $ MIMEType maj min params
+      toAscii ∷ Monad m ⇒ String → m Ascii
+      toAscii (trim → s)
+          = case ca s of
+              Success a → return a
+              Failure e → fail (show e)
 
--- |'Parser' for a list of 'MIMEType's.
-mimeTypeList ∷ Parser [MIMEType]
-{-# INLINE mimeTypeList #-}
-mimeTypeList = listOf mimeType
+      unsupported ∷ Monad m ⇒ m α
+      unsupported = fail "Unsupported usage of mimeType quasi-quoter."