6fcccbba19Now that ghc 9.0.2 is the oldest supported version. Eg cruft from https://web.archive.org/web/20190424185034/https://prime.haskell.org/wiki/Libraries/Proposals/SemigroupMonoid Sponsored-by: Jack Hill
65 lines
1.4 KiB
Haskell
65 lines
1.4 KiB
Haskell
{- git-annex metadata, standard fields
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-
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- Copyright 2014 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 Annex.MetaData.StandardFields (
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tagMetaField,
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yearMetaField,
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monthMetaField,
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dayMetaField,
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isDateMetaField,
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lastChangedField,
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mkLastChangedField,
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isLastChangedField,
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itemIdField
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) where
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import Types.MetaData
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import qualified Data.Text as T
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tagMetaField :: MetaField
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tagMetaField = mkMetaFieldUnchecked "tag"
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yearMetaField :: MetaField
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yearMetaField = mkMetaFieldUnchecked "year"
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monthMetaField :: MetaField
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monthMetaField = mkMetaFieldUnchecked "month"
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dayMetaField :: MetaField
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dayMetaField = mkMetaFieldUnchecked "day"
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isDateMetaField :: MetaField -> Bool
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isDateMetaField f
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| f == yearMetaField = True
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| f == monthMetaField = True
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| f == dayMetaField = True
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| otherwise = False
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lastChangedField :: MetaField
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lastChangedField = mkMetaFieldUnchecked lastchanged
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mkLastChangedField :: MetaField -> MetaField
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mkLastChangedField f = mkMetaFieldUnchecked (fromMetaField f <> lastchangedSuffix)
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isLastChangedField :: MetaField -> Bool
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isLastChangedField f
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| f == lastChangedField = True
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| otherwise = lastchanged `T.isSuffixOf` s && s /= lastchangedSuffix
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where
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s = fromMetaField f
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lastchanged :: T.Text
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lastchanged = "lastchanged"
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lastchangedSuffix :: T.Text
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lastchangedSuffix = "-lastchanged"
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itemIdField :: MetaField
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itemIdField = mkMetaFieldUnchecked "itemid"
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