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PR-URL: https://github.com/hasura/graphql-engine-mono/pull/3074 Co-authored-by: David Overton <7734777+dmoverton@users.noreply.github.com> Co-authored-by: Lyndon Maydwell <92299+sordina@users.noreply.github.com> Co-authored-by: Tirumarai Selvan <8663570+tirumaraiselvan@users.noreply.github.com> GitOrigin-RevId: 006c5c9b71cdca1c2f47962230e6189e09557fab
59 lines
1.5 KiB
Haskell
59 lines
1.5 KiB
Haskell
module Data.TByteString
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( TByteString,
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fromText,
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fromBS,
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fromLBS,
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toLBS,
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)
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where
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import Data.Aeson qualified as J
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import Data.Bool (bool)
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import Data.ByteString qualified as B
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import Data.ByteString.Base64 qualified as B64
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import Data.ByteString.Lazy qualified as BL
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import Data.String
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import Data.Text qualified as T
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import Data.Text.Encoding qualified as TE
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import Prelude
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-- | A JSON-serializable type for either text or raw binary data, encoded with base-64.
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newtype TByteString
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= TByteString (Bool, T.Text)
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deriving (Show, Eq)
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instance J.ToJSON TByteString where
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toJSON (TByteString (isBase64, t)) =
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bool (J.toJSON t) (J.toJSON ["Base64", t]) isBase64
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instance IsString TByteString where
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fromString = fromText . T.pack
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fromText :: T.Text -> TByteString
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fromText t = TByteString (False, t)
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fromBS :: B.ByteString -> TByteString
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fromBS bs =
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TByteString $
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-- if the bs in not utf-8 encoded, encode it to Base64
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case TE.decodeUtf8' bs of
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Left _ -> (True, TE.decodeUtf8 $ B64.encode bs)
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Right t -> (False, t)
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fromLBS :: BL.ByteString -> TByteString
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fromLBS =
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fromBS . BL.toStrict
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toBS :: TByteString -> Maybe B.ByteString
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toBS (TByteString (p, txt)) =
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case p of
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-- Text is encoded in Base64
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True -> case B64.decode $ TE.encodeUtf8 txt of
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Left _ -> Nothing
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Right bs -> Just bs
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-- Text is not encoded in Base64
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False -> Just $ TE.encodeUtf8 txt
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toLBS :: TByteString -> Maybe BL.ByteString
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toLBS = fmap BL.fromStrict . toBS
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