mirror of https://github.com/voidlizard/hbs2
32 lines
932 B
Haskell
32 lines
932 B
Haskell
module HBS2.Data.Detect where
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import HBS2.Prelude.Plated
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import HBS2.Hash
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import HBS2.Data.Types
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import HBS2.Merkle
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import Codec.Serialise (deserialiseOrFail)
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import Data.ByteString.Lazy (ByteString)
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import Data.Either
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import Data.Function
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import Data.Functor
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data BlobType = Merkle (Hash HbSync)
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| MerkleAnn (MTreeAnn [HashRef])
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| AnnRef (Hash HbSync)
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| SeqRef SequentialRef
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| Blob (Hash HbSync)
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deriving (Show,Data)
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tryDetect :: Hash HbSync -> ByteString -> BlobType
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tryDetect hash obj = rights [mbAnn, mbLink, mbMerkle, mbSeq] & headDef orBlob
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where
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mbLink = deserialiseOrFail @AnnotatedHashRef obj >> pure (AnnRef hash)
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mbMerkle = deserialiseOrFail @(MTree [HashRef]) obj >> pure (Merkle hash)
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mbSeq = deserialiseOrFail @SequentialRef obj <&> SeqRef
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mbAnn = deserialiseOrFail obj <&> MerkleAnn
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orBlob = Blob hash
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