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--------------------------------------------------------------------------------
-- | Describes writable items; items that can be saved to the disk
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE TypeSynonymInstances #-}
module Hakyll.Core.Writable
( Writable (..)
) where
--------------------------------------------------------------------------------
import qualified Data.ByteString as SB
import qualified Data.ByteString.Lazy as LB
import Data.Word (Word8)
import Text.Blaze.Html (Html)
import Text.Blaze.Html.Renderer.String (renderHtml)
--------------------------------------------------------------------------------
import Hakyll.Core.Item
--------------------------------------------------------------------------------
-- | Describes an item that can be saved to the disk
class Writable a where
-- | Save an item to the given filepath
write :: FilePath -> Item a -> IO ()
--------------------------------------------------------------------------------
instance Writable () where
write _ _ = return ()
--------------------------------------------------------------------------------
instance Writable [Char] where
write p = writeFile p . itemBody
--------------------------------------------------------------------------------
instance Writable SB.ByteString where
write p = SB.writeFile p . itemBody
--------------------------------------------------------------------------------
instance Writable LB.ByteString where
write p = LB.writeFile p . itemBody
--------------------------------------------------------------------------------
instance Writable [Word8] where
write p = write p . fmap SB.pack
--------------------------------------------------------------------------------
instance Writable Html where
write p = write p . fmap renderHtml
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