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Refactor cache interaction
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parent
9300a1bc60
commit
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@ -23,21 +23,19 @@ cached cachePrefix f =
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writeCache :: ToRecord a => [a] -> Cache [a]
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writeCache :: ToRecord a => [a] -> Cache [a]
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writeCache [] = return []
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writeCache [] = return []
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writeCache contents = do
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writeCache contents = do
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liftIO $ D.createDirectoryIfMissing True cacheDirectory
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ensureCacheDirectoryExists
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(CacheFileName fileName) <- ask
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writeContentsToCacheFile contents =<< ask
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liftIO $ BS.writeFile fileName $ encode contents
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return contents
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return contents
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readCache :: FromRecord a => Cache (Maybe [a])
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readCache :: FromRecord a => Cache (Maybe [a])
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readCache = do
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readCache =
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(CacheFileName fileName) <- ask
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either
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either
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(const Nothing)
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(const Nothing)
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(processCsv . decode NoHeader)
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(processCsv . decode NoHeader)
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<$> liftIO (safeReadFile fileName)
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<$> (readFromCache =<< ask)
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where
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where
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processCsv = either (const Nothing) (Just . V.toList)
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processCsv = either (const Nothing) (Just . V.toList)
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readFromCache (CacheFileName fileName) = liftIO $ safeReadFile fileName
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cacheFileName :: String -> IO (Either FingerprintOutcome CacheFileName)
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cacheFileName :: String -> IO (Either FingerprintOutcome CacheFileName)
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cacheFileName context = do
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cacheFileName context = do
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@ -48,3 +46,11 @@ cacheFileName context = do
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cacheDirectory :: String
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cacheDirectory :: String
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cacheDirectory = "tmp/unused"
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cacheDirectory = "tmp/unused"
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ensureCacheDirectoryExists :: Cache ()
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ensureCacheDirectoryExists =
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liftIO $ D.createDirectoryIfMissing True cacheDirectory
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writeContentsToCacheFile :: ToRecord a => [a] -> CacheFileName -> Cache ()
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writeContentsToCacheFile contents (CacheFileName fileName) =
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liftIO $ BS.writeFile fileName $ encode contents
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