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|
-- ldgallery - A static generator which turns a collection of tagged
-- pictures into a searchable web gallery.
--
-- Copyright (C) 2019-2020 Pacien TRAN-GIRARD
--
-- This program is free software: you can redistribute it and/or modify
-- it under the terms of the GNU Affero General Public License as
-- published by the Free Software Foundation, either version 3 of the
-- License, or (at your option) any later version.
--
-- This program is distributed in the hope that it will be useful,
-- but WITHOUT ANY WARRANTY; without even the implied warranty of
-- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-- GNU Affero General Public License for more details.
--
-- You should have received a copy of the GNU Affero General Public License
-- along with this program. If not, see <https://www.gnu.org/licenses/>.
module ItemProcessors
( ItemProcessor
, itemFileProcessor
, thumbnailFileProcessor
) where
import Data.Char (toLower)
import System.FilePath (takeExtension)
import Config (Resolution(..))
import Resource (ItemProcessor, Thumbnail(..), GalleryItemProps(..))
import Caching (Cache)
import FileProcessors
import Files
data Format =
PictureFormat
| PlainTextFormat
| PortableDocumentFormat
| VideoFormat
| AudioFormat
| Unknown
formatFromPath :: Path -> Format
formatFromPath =
maybe Unknown ((fromExt . map toLower) . takeExtension) . fileName
where
fromExt :: String -> Format
fromExt ext = case ext of
".bmp" -> PictureFormat
".jpg" -> PictureFormat
".jpeg" -> PictureFormat
".png" -> PictureFormat
".tiff" -> PictureFormat
".hdr" -> PictureFormat
".gif" -> PictureFormat
".webp" -> PictureFormat
".txt" -> PlainTextFormat
".md" -> PlainTextFormat -- TODO: handle markdown separately
".pdf" -> PortableDocumentFormat
".wav" -> AudioFormat
".oga" -> AudioFormat
".ogg" -> AudioFormat
".spx" -> AudioFormat
".opus" -> AudioFormat
".flac" -> AudioFormat
".m4a" -> AudioFormat
".mp3" -> AudioFormat
".ogv" -> VideoFormat
".ogx" -> VideoFormat
".webm" -> VideoFormat
".mkv" -> VideoFormat
".mp4" -> VideoFormat
_ -> Unknown
type ItemFileProcessor a =
FilePath -- ^ Filesystem input base path
-> FilePath -- ^ Filesystem output base path
-> FileName -- ^ Output class (subdir)
-> ItemProcessor a
callFileProcessor :: (Path -> FileProcessor a) -> Cache a -> ItemFileProcessor a
callFileProcessor processorProvider withCache inputBase outputBase resClass itemPath resPath =
withCache (processorProvider resPath)
itemPath
(resClass /> resPath)
(localPath $ inputBase /> resPath)
(localPath $ outputBase /> (resClass /> resPath))
itemFileProcessor :: Maybe Resolution -> Cache GalleryItemProps -> ItemFileProcessor GalleryItemProps
itemFileProcessor maxResolution =
callFileProcessor (flip processorFor maxResolution . formatFromPath)
where
processorFor :: Format -> Maybe Resolution -> FileProcessor GalleryItemProps
processorFor PictureFormat (Just maxRes) =
transformThenDescribe (resizePictureUpTo maxRes) getPictureProps
processorFor PictureFormat Nothing =
transformThenDescribe copyFileProcessor getPictureProps
processorFor PlainTextFormat _ = copyResource PlainText
processorFor PortableDocumentFormat _ = copyResource PDF
processorFor VideoFormat _ = copyResource Video
processorFor AudioFormat _ = copyResource Audio
processorFor Unknown _ = copyResource Other
-- TODO: handle video reencoding and others?
thumbnailFileProcessor :: Resolution -> Cache (Maybe Thumbnail) -> ItemFileProcessor (Maybe Thumbnail)
thumbnailFileProcessor maxRes =
callFileProcessor (processorFor . formatFromPath)
where
processorFor :: Format -> FileProcessor (Maybe Thumbnail)
processorFor PictureFormat = transformThenDescribe (resizePictureUpTo maxRes) getThumbnailProps
processorFor _ = noopProcessor
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