{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RankNTypes #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeFamilies #-}
module Data.MIME.Charset
(
HasCharset(..)
, CharsetName
, charsetText
, charsetText'
, CharsetError(..)
, AsCharsetError(..)
, charsetPrism
, CharsetLookup
, defaultCharsets
, decodeLenient
) where
import Control.Lens
import qualified Data.ByteString as B
import qualified Data.CaseInsensitive as CI
import qualified Data.Text as T
import qualified Data.Text.Encoding as T
import qualified Data.Text.Encoding.Error as T
{-# ANN module ("HLint: ignore Use camelCase" :: String) #-}
type CharsetName = CI.CI B.ByteString
type Charset = B.ByteString -> T.Text
data CharsetError
= CharsetUnspecified
| CharsetUnsupported CharsetName
| CharsetDecodeError CharsetName
deriving (Int -> CharsetError -> ShowS
[CharsetError] -> ShowS
CharsetError -> String
(Int -> CharsetError -> ShowS)
-> (CharsetError -> String)
-> ([CharsetError] -> ShowS)
-> Show CharsetError
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [CharsetError] -> ShowS
$cshowList :: [CharsetError] -> ShowS
show :: CharsetError -> String
$cshow :: CharsetError -> String
showsPrec :: Int -> CharsetError -> ShowS
$cshowsPrec :: Int -> CharsetError -> ShowS
Show)
class AsCharsetError s where
_CharsetError :: Prism' s CharsetError
_CharsetUnspecified :: Prism' s ()
_CharsetUnsupported :: Prism' s CharsetName
_CharsetDecodeError :: Prism' s CharsetName
_CharsetUnspecified = p CharsetError (f CharsetError) -> p s (f s)
forall s. AsCharsetError s => Prism' s CharsetError
_CharsetError (p CharsetError (f CharsetError) -> p s (f s))
-> (p () (f ()) -> p CharsetError (f CharsetError))
-> p () (f ())
-> p s (f s)
forall b c a. (b -> c) -> (a -> b) -> a -> c
. p () (f ()) -> p CharsetError (f CharsetError)
forall s. AsCharsetError s => Prism' s ()
_CharsetUnspecified
_CharsetUnsupported = p CharsetError (f CharsetError) -> p s (f s)
forall s. AsCharsetError s => Prism' s CharsetError
_CharsetError (p CharsetError (f CharsetError) -> p s (f s))
-> (p CharsetName (f CharsetName)
-> p CharsetError (f CharsetError))
-> p CharsetName (f CharsetName)
-> p s (f s)
forall b c a. (b -> c) -> (a -> b) -> a -> c
. p CharsetName (f CharsetName) -> p CharsetError (f CharsetError)
forall s. AsCharsetError s => Prism' s CharsetName
_CharsetUnsupported
_CharsetDecodeError = p CharsetError (f CharsetError) -> p s (f s)
forall s. AsCharsetError s => Prism' s CharsetError
_CharsetError (p CharsetError (f CharsetError) -> p s (f s))
-> (p CharsetName (f CharsetName)
-> p CharsetError (f CharsetError))
-> p CharsetName (f CharsetName)
-> p s (f s)
forall b c a. (b -> c) -> (a -> b) -> a -> c
. p CharsetName (f CharsetName) -> p CharsetError (f CharsetError)
forall s. AsCharsetError s => Prism' s CharsetName
_CharsetDecodeError
instance AsCharsetError CharsetError where
_CharsetError :: p CharsetError (f CharsetError) -> p CharsetError (f CharsetError)
_CharsetError = p CharsetError (f CharsetError) -> p CharsetError (f CharsetError)
forall a. a -> a
id
_CharsetUnspecified :: p () (f ()) -> p CharsetError (f CharsetError)
_CharsetUnspecified = (() -> CharsetError)
-> (CharsetError -> Maybe ()) -> Prism' CharsetError ()
forall b s a. (b -> s) -> (s -> Maybe a) -> Prism s s a b
prism' (CharsetError -> () -> CharsetError
forall a b. a -> b -> a
const CharsetError
CharsetUnspecified) ((CharsetError -> Maybe ()) -> Prism' CharsetError ())
-> (CharsetError -> Maybe ()) -> Prism' CharsetError ()
forall a b. (a -> b) -> a -> b
$ \case
CharsetError
CharsetUnspecified -> () -> Maybe ()
forall a. a -> Maybe a
Just () ; CharsetError
_ -> Maybe ()
forall a. Maybe a
Nothing
_CharsetUnsupported :: p CharsetName (f CharsetName) -> p CharsetError (f CharsetError)
_CharsetUnsupported = (CharsetName -> CharsetError)
-> (CharsetError -> Maybe CharsetName)
-> Prism' CharsetError CharsetName
forall b s a. (b -> s) -> (s -> Maybe a) -> Prism s s a b
prism' CharsetName -> CharsetError
CharsetUnsupported ((CharsetError -> Maybe CharsetName)
-> Prism' CharsetError CharsetName)
-> (CharsetError -> Maybe CharsetName)
-> Prism' CharsetError CharsetName
forall a b. (a -> b) -> a -> b
$ \case
CharsetUnsupported CharsetName
k -> CharsetName -> Maybe CharsetName
forall a. a -> Maybe a
Just CharsetName
k ; CharsetError
_ -> Maybe CharsetName
forall a. Maybe a
Nothing
_CharsetDecodeError :: p CharsetName (f CharsetName) -> p CharsetError (f CharsetError)
_CharsetDecodeError = (CharsetName -> CharsetError)
-> (CharsetError -> Maybe CharsetName)
-> Prism' CharsetError CharsetName
forall b s a. (b -> s) -> (s -> Maybe a) -> Prism s s a b
prism' CharsetName -> CharsetError
CharsetDecodeError ((CharsetError -> Maybe CharsetName)
-> Prism' CharsetError CharsetName)
-> (CharsetError -> Maybe CharsetName)
-> Prism' CharsetError CharsetName
forall a b. (a -> b) -> a -> b
$ \case
CharsetDecodeError CharsetName
k -> CharsetName -> Maybe CharsetName
forall a. a -> Maybe a
Just CharsetName
k ; CharsetError
_ -> Maybe CharsetName
forall a. Maybe a
Nothing
class HasCharset a where
type Decoded a
charsetName :: Getter a (Maybe CharsetName)
charsetData :: Getter a B.ByteString
charsetDecoded
:: AsCharsetError e
=> CharsetLookup
-> ( forall p f. (Profunctor p, Contravariant f)
=> Optic' p f a (Either e (Decoded a)) )
charsetDecoded'
:: CharsetLookup
-> ( forall p f. (Profunctor p, Contravariant f)
=> Optic' p f a (Either CharsetError (Decoded a)) )
charsetDecoded' = CharsetLookup -> Optic' p f a (Either CharsetError (Decoded a))
forall a e.
(HasCharset a, AsCharsetError e) =>
CharsetLookup
-> forall (p :: * -> * -> *) (f :: * -> *).
(Profunctor p, Contravariant f) =>
Optic' p f a (Either e (Decoded a))
charsetDecoded
charsetEncode :: Decoded a -> a
charsetText
:: (HasCharset a, AsCharsetError e, Profunctor p, Contravariant f)
=> CharsetLookup -> Optic' p f a (Either e T.Text)
charsetText :: CharsetLookup -> Optic' p f a (Either e Text)
charsetText CharsetLookup
lookupCharset = (a -> Either e Text) -> Optic' p f a (Either e Text)
forall (p :: * -> * -> *) (f :: * -> *) s a.
(Profunctor p, Contravariant f) =>
(s -> a) -> Optic' p f s a
to ((a -> Either e Text) -> Optic' p f a (Either e Text))
-> (a -> Either e Text) -> Optic' p f a (Either e Text)
forall a b. (a -> b) -> a -> b
$ \a
a ->
Either e CharsetName
-> (CharsetName -> Either e CharsetName)
-> Maybe CharsetName
-> Either e CharsetName
forall b a. b -> (a -> b) -> Maybe a -> b
maybe (e -> Either e CharsetName
forall a b. a -> Either a b
Left (e -> Either e CharsetName) -> e -> Either e CharsetName
forall a b. (a -> b) -> a -> b
$ AReview e () -> () -> e
forall b (m :: * -> *) t. MonadReader b m => AReview t b -> m t
review AReview e ()
forall s. AsCharsetError s => Prism' s ()
_CharsetUnspecified ()) CharsetName -> Either e CharsetName
forall a b. b -> Either a b
Right (Getting (Maybe CharsetName) a (Maybe CharsetName)
-> a -> Maybe CharsetName
forall s (m :: * -> *) a. MonadReader s m => Getting a s a -> m a
view Getting (Maybe CharsetName) a (Maybe CharsetName)
forall a. HasCharset a => Getter a (Maybe CharsetName)
charsetName a
a)
Either e CharsetName
-> (CharsetName -> Either e Text) -> Either e Text
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= \CharsetName
k -> Either e Charset
-> (Charset -> Either e Charset)
-> Maybe Charset
-> Either e Charset
forall b a. b -> (a -> b) -> Maybe a -> b
maybe (e -> Either e Charset
forall a b. a -> Either a b
Left (e -> Either e Charset) -> e -> Either e Charset
forall a b. (a -> b) -> a -> b
$ AReview e CharsetName -> CharsetName -> e
forall b (m :: * -> *) t. MonadReader b m => AReview t b -> m t
review AReview e CharsetName
forall s. AsCharsetError s => Prism' s CharsetName
_CharsetUnsupported CharsetName
k) Charset -> Either e Charset
forall a b. b -> Either a b
Right (CharsetLookup
lookupCharset CharsetName
k)
Either e Charset -> (Charset -> Either e Text) -> Either e Text
forall (m :: * -> *) a b. Monad m => m a -> (a -> m b) -> m b
>>= \Charset
f -> Text -> Either e Text
forall (f :: * -> *) a. Applicative f => a -> f a
pure (Charset
f (Getting ByteString a ByteString -> a -> ByteString
forall s (m :: * -> *) a. MonadReader s m => Getting a s a -> m a
view Getting ByteString a ByteString
forall a. HasCharset a => Getter a ByteString
charsetData a
a))
charsetText'
:: (HasCharset a, Profunctor p, Contravariant f)
=> CharsetLookup
-> Optic' p f a (Either CharsetError T.Text)
charsetText' :: CharsetLookup -> Optic' p f a (Either CharsetError Text)
charsetText' = CharsetLookup -> Optic' p f a (Either CharsetError Text)
forall a e (p :: * -> * -> *) (f :: * -> *).
(HasCharset a, AsCharsetError e, Profunctor p, Contravariant f) =>
CharsetLookup -> Optic' p f a (Either e Text)
charsetText
charsetPrism :: forall a. (HasCharset a) => CharsetLookup -> Prism' a (Decoded a)
charsetPrism :: CharsetLookup -> Prism' a (Decoded a)
charsetPrism CharsetLookup
m = (Decoded a -> a)
-> (a -> Maybe (Decoded a)) -> Prism' a (Decoded a)
forall b s a. (b -> s) -> (s -> Maybe a) -> Prism s s a b
prism' Decoded a -> a
forall a. HasCharset a => Decoded a -> a
charsetEncode ((CharsetError -> Maybe (Decoded a))
-> (Decoded a -> Maybe (Decoded a))
-> Either CharsetError (Decoded a)
-> Maybe (Decoded a)
forall a c b. (a -> c) -> (b -> c) -> Either a b -> c
either CharsetError -> Maybe (Decoded a)
forall x. CharsetError -> Maybe x
err Decoded a -> Maybe (Decoded a)
forall a. a -> Maybe a
Just (Either CharsetError (Decoded a) -> Maybe (Decoded a))
-> (a -> Either CharsetError (Decoded a)) -> a -> Maybe (Decoded a)
forall b c a. (b -> c) -> (a -> b) -> a -> c
. Getting
(Either CharsetError (Decoded a))
a
(Either CharsetError (Decoded a))
-> a -> Either CharsetError (Decoded a)
forall s (m :: * -> *) a. MonadReader s m => Getting a s a -> m a
view (CharsetLookup
-> forall (p :: * -> * -> *) (f :: * -> *).
(Profunctor p, Contravariant f) =>
Optic' p f a (Either CharsetError (Decoded a))
forall a e.
(HasCharset a, AsCharsetError e) =>
CharsetLookup
-> forall (p :: * -> * -> *) (f :: * -> *).
(Profunctor p, Contravariant f) =>
Optic' p f a (Either e (Decoded a))
charsetDecoded CharsetLookup
m))
where
err :: CharsetError -> Maybe x
err = Maybe x -> CharsetError -> Maybe x
forall a b. a -> b -> a
const Maybe x
forall a. Maybe a
Nothing :: CharsetError -> Maybe x
charsets :: [(CI.CI B.ByteString, Charset)]
charsets :: [(CharsetName, Charset)]
charsets =
[ (CharsetName
"us-ascii", Charset
us_ascii)
, (CharsetName
"utf-8", Charset
utf_8)
, (CharsetName
"iso-8859-1", Charset
iso_8859_1)
, (CharsetName
"ISO646-US", Charset
us_ascii)
, (CharsetName
"ANSI_X3.4-1968", Charset
us_ascii)
]
us_ascii, utf_8, iso_8859_1 :: Charset
us_ascii :: Charset
us_ascii = Charset
decodeLenient
utf_8 :: Charset
utf_8 = Charset
decodeLenient
iso_8859_1 :: Charset
iso_8859_1 = Charset
T.decodeLatin1
type CharsetLookup = CI.CI B.ByteString -> Maybe Charset
defaultCharsets :: CharsetLookup
defaultCharsets :: CharsetLookup
defaultCharsets CharsetName
k = CharsetName -> [(CharsetName, Charset)] -> Maybe Charset
forall a b. Eq a => a -> [(a, b)] -> Maybe b
lookup CharsetName
k [(CharsetName, Charset)]
charsets
decodeLenient :: B.ByteString -> T.Text
decodeLenient :: Charset
decodeLenient = OnDecodeError -> Charset
T.decodeUtf8With OnDecodeError
T.lenientDecode