1b3d04979e
Only test parsing of ContentIdentifier lists, not the whole log.
75 lines
2.3 KiB
Haskell
75 lines
2.3 KiB
Haskell
{- Remote content identifier logs, pure operations.
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-
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- Copyright 2019 Joey Hess <id@joeyh.name>
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-
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- Licensed under the GNU AGPL version 3 or higher.
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-}
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{-# LANGUAGE OverloadedStrings #-}
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module Logs.ContentIdentifier.Pure where
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import Annex.Common
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import Logs.UUIDBased
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import Types.Import
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import Utility.Base64
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import qualified Data.ByteString as S
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import qualified Data.ByteString.Char8 as S8
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import qualified Data.ByteString.Lazy as L
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import qualified Data.Attoparsec.ByteString.Lazy as A
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import qualified Data.Attoparsec.ByteString.Char8 as A8
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import Data.ByteString.Builder
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import Data.List.NonEmpty (NonEmpty(..))
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import qualified Data.List.NonEmpty
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-- A ContentIdentifier can contain "", so to avoid ambiguity
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-- in parsing, the list of them in the log must be non-empty.
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type ContentIdentifierLog = Log (NonEmpty ContentIdentifier)
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contentIdentifierList :: Maybe (NonEmpty ContentIdentifier) -> [ContentIdentifier]
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contentIdentifierList (Just l) = Data.List.NonEmpty.toList l
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contentIdentifierList Nothing = []
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buildLog :: ContentIdentifierLog -> Builder
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buildLog = buildLogNew buildContentIdentifierList
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buildContentIdentifierList :: (NonEmpty ContentIdentifier) -> Builder
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buildContentIdentifierList l = case l of
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c :| [] -> buildcid c
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(c :| cs) -> go (c:cs)
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where
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buildcid (ContentIdentifier c)
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| S8.any (`elem` [':', '\r', '\n']) c || "!" `S8.isPrefixOf` c =
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charUtf8 '!' <> byteString (toB64' c)
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| otherwise = byteString c
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go [] = mempty
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go (c:[]) = buildcid c
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go (c:cs) = buildcid c <> charUtf8 ':' <> go cs
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parseLog :: L.ByteString -> ContentIdentifierLog
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parseLog = parseLogNew parseContentIdentifierList
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parseContentIdentifierList :: A.Parser (NonEmpty ContentIdentifier)
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parseContentIdentifierList = do
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first <- cidparser
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listparser first []
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where
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cidparser = do
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b <- A8.takeWhile (/= ':')
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return $ if "!" `S8.isPrefixOf` b
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then ContentIdentifier $ fromMaybe b (fromB64Maybe' (S.drop 1 b))
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else ContentIdentifier b
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listparser first rest = ifM A8.atEnd
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( return (first :| reverse rest)
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, do
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_ <- A8.char ':'
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cid <- cidparser
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listparser first (cid:rest)
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)
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prop_parse_build_contentidentifier_log :: NonEmpty ContentIdentifier -> Bool
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prop_parse_build_contentidentifier_log l =
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let v = A.parseOnly parseContentIdentifierList $ L.toStrict $
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toLazyByteString $ buildContentIdentifierList l
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in v == Right l
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