44 lines
1.4 KiB
Haskell
44 lines
1.4 KiB
Haskell
{- git-annex assistant change tracking
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-
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- Copyright 2012 Joey Hess <joey@kitenet.net>
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-
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- Licensed under the GNU GPL version 3 or higher.
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-}
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module Assistant.Changes where
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import Assistant.Common
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import Assistant.Types.Changes
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import Utility.TSet
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import Data.Time.Clock
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import Control.Concurrent.STM
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{- Handlers call this when they made a change that needs to get committed. -}
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madeChange :: FilePath -> ChangeInfo -> Assistant (Maybe Change)
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madeChange f t = Just <$> (Change <$> liftIO getCurrentTime <*> pure f <*> pure t)
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noChange :: Assistant (Maybe Change)
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noChange = return Nothing
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{- Indicates an add needs to be done, but has not started yet. -}
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pendingAddChange :: FilePath -> Assistant (Maybe Change)
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pendingAddChange f = Just <$> (PendingAddChange <$> liftIO getCurrentTime <*> pure f)
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{- Gets all unhandled changes.
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- Blocks until at least one change is made. -}
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getChanges :: Assistant [Change]
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getChanges = (atomically . getTSet) <<~ changeChan
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{- Gets all unhandled changes, without blocking. -}
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getAnyChanges :: Assistant [Change]
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getAnyChanges = (atomically . readTSet) <<~ changeChan
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{- Puts unhandled changes back into the channel.
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- Note: Original order is not preserved. -}
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refillChanges :: [Change] -> Assistant ()
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refillChanges cs = (atomically . flip putTSet cs) <<~ changeChan
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{- Records a change in the channel. -}
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recordChange :: Change -> Assistant ()
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recordChange c = (atomically . flip putTSet1 c) <<~ changeChan
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