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{- git-annex multicast fingerprint log
-
- Copyright 2017, 2019 Joey Hess <id@joeyh.name>
-
- Licensed under the GNU GPL version 3 or higher.
-}
module Logs.Multicast (
Fingerprint(..),
recordFingerprint,
knownFingerPrints,
) where
import Annex.Common
import qualified Annex.Branch
import Logs
import Logs.UUIDBased
import qualified Data.Map as M
import qualified Data.Attoparsec.ByteString.Lazy as A
import Data.ByteString.Builder
newtype Fingerprint = Fingerprint String
deriving (Eq, Read, Show)
recordFingerprint :: Fingerprint -> UUID -> Annex ()
recordFingerprint fp uuid = do
c <- liftIO currentVectorClock
Annex.Branch.change multicastLog $
buildLog buildFindgerPrint
. changeLog c uuid fp
. parseLog fingerprintParser
knownFingerPrints :: Annex (M.Map UUID Fingerprint)
knownFingerPrints = simpleMap . parseLog fingerprintParser
<$> Annex.Branch.get activityLog
fingerprintParser :: A.Parser Fingerprint
fingerprintParser = maybe (fail "fingerprint parse failed") pure
. readish . decodeBS =<< A.takeByteString
buildFindgerPrint :: Fingerprint -> Builder
buildFindgerPrint = byteString . encodeBS . show
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