324 lines
9.7 KiB
Haskell
324 lines
9.7 KiB
Haskell
{-# OPTIONS_GHC -Wno-orphans #-}
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module Info
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(Info (..), tagsFor, descFor, imagesFor, linksFor,
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Artist (..), Image (..), Link (..),
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GalleryInfo (..), GalleryFilters (..), ArtistFilter (..), NsfwFilter (..),
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IndexInfo (..),
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readArtistFilter, matchArtist, readNsfwFilter, matchNsfw, matchFilters,
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NoThumb (..), getThumb, thumbFile, pageFile,
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-- ** Reexports
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Day (..), Text)
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where
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import Records
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import Control.Applicative
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import Control.Monad
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import Control.Exception
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import Data.Foldable (find)
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import Data.Hashable (Hashable)
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import Data.HashSet (HashSet)
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import qualified Data.HashSet as HashSet
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import qualified Data.Map.Strict as Map
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import Data.Maybe (isJust, isNothing)
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import Data.Ord (comparing)
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import Data.String (IsString)
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import Data.Text (Text)
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import qualified Data.Text as Text
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import Data.Time.Calendar (Day (..), toGregorian)
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import Data.YAML (FromYAML (..), (.:), (.:?), (.!=))
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import qualified Data.YAML as YAML
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import System.FilePath ((</>), takeBaseName, takeExtension, splitExtension)
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import Text.Read (readMaybe)
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data Info =
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Info {
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date :: !Day,
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title :: !Text,
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artist :: !(Maybe Artist), -- nothing = me, obv
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nsfwOnly :: !Bool,
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tags :: ![Text],
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nsfwTags :: ![Text],
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desc :: !(Maybe Text),
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nsfwDesc :: !(Maybe Text),
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bg :: !(Maybe Text),
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images :: ![Image],
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thumb' :: !(Maybe FilePath),
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links :: ![Link],
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extras :: ![FilePath]
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}
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deriving (Eq, Show)
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data Artist =
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Artist {
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name :: !Text,
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url :: !(Maybe Text)
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}
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deriving (Eq, Show)
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data Image =
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Image {
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label :: !Text,
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path :: !FilePath,
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download :: !(Maybe FilePath),
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nsfw :: !Bool,
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warning :: !(Maybe Text)
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}
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deriving (Eq, Show)
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data Link =
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Link {
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title :: !Text,
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url :: !Text,
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nsfw :: !Bool
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}
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deriving (Eq, Show)
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instance HasField "sfw" Image Bool where getField = not . #nsfw
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instance HasField "sfw" Link Bool where getField = not . #nsfw
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instance HasField "sfwImages" Info [Image] where
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getField = filter #sfw . #images
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instance HasField "nsfwImages" Info [Image] where
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getField = filter #nsfw . #images
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instance HasField "allNsfw" Info Bool where getField = null . #sfwImages
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instance HasField "allSfw" Info Bool where getField = null . #nsfwImages
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instance HasField "anySfw" Info Bool where getField = not . #allNsfw
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instance HasField "anyNsfw" Info Bool where getField = not . #allSfw
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instance HasField "sfwLinks" Info [Link] where
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getField = filter #sfw . #links
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instance HasField "nsfwLinks" Info [Link] where
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getField = filter #nsfw . #links
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instance HasField "thumb" Info (Maybe FilePath) where
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getField (Info {thumb', images}) = thumb' <|> #path <$> find #sfw images
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instance HasField "mine" Info Bool where getField = isNothing . #artist
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instance HasField "notMine" Info Bool where getField = isJust . #artist
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instance HasField "dmy" Info (Integer, Int, Int) where
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getField = toGregorian . #date
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instance HasField "year" Info Integer where getField = #first . #dmy
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instance HasField "month" Info Int where getField = #second . #dmy
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instance HasField "day" Info Int where getField = #third . #dmy
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descFor :: Bool -> Info -> Maybe Text
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descFor nsfw (Info {desc, nsfwDesc}) = desc <> (guard nsfw *> nsfwDesc)
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tagsFor :: Bool -> Info -> [Text]
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tagsFor nsfw i = if nsfw then #tags i <> #nsfwTags i else #tags i
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imagesFor :: Bool -> Info -> [Image]
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imagesFor nsfw = if nsfw then #images else #sfwImages
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linksFor :: Bool -> Info -> [Link]
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linksFor nsfw = if nsfw then #links else #sfwLinks
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instance Ord Info where
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compare = comparing \Info {date, title} -> (date, title)
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newtype NoThumb = NoThumb FilePath
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deriving stock Eq deriving anyclass Exception
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instance Show NoThumb where show (NoThumb dir) = "no thumbnail for " ++ dir
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getThumb :: FilePath -> Info -> FilePath
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getThumb dir =
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maybe (throw $ NoThumb dir) (\t -> dir </> thumbFile t) . #thumb
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thumbFile :: FilePath -> FilePath
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thumbFile = addSuffix "_small"
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pageFile :: FilePath -> FilePath
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pageFile f
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| takeExtension f == ".gif" = f
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| otherwise = addSuffix "_med" f
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addSuffix :: String -> FilePath -> FilePath
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addSuffix suf path =
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let (pre, ext) = splitExtension path in
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pre ++ suf ++ ext
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instance FromYAML Info where
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parseYAML = YAML.withMap "info" \m ->
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Info <$> m .: "date"
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<*> m .: "title"
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<*> m .:? "artist"
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<*> m .:? "nsfw-only" .!= False
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<*> m .:? "tags" .!= []
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<*> m .:? "nsfw-tags" .!= []
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<*> m .:? "desc"
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<*> m .:? "nsfw-desc"
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<*> m .:? "bg"
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<*> (m .: "images" >>= imageList)
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<*> m .:? "thumb"
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<*> m .:? "links" .!= []
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<*> m .:? "extras" .!= []
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instance FromYAML Artist where
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parseYAML y = justName y <|> withUrl y where
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justName = YAML.withStr "name" \name -> pure $ Artist {name, url = Nothing}
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withUrl = YAML.withMap "full info" \m ->
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Artist <$> m .: "name" <*> m .:? "url"
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imageList :: YAML.Node YAML.Pos -> YAML.Parser [Image]
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imageList y = pure <$> unlabelledImage y <|> parseYAML y
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instance FromYAML Image where
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parseYAML y = unlabelledImage y <|> labelled y where
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labelled y' = do
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Pair label rest <- parseYAML y'
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i <- unlabelledImage rest
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pure $ i {label}
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unlabelledImage :: YAML.Node YAML.Pos -> YAML.Parser Image
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unlabelledImage y = asStr y <|> asObj y
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where
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asStr = YAML.withStr "path" \(Text.unpack -> path) ->
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pure $ Image {label = pathToLabel path, path, download = Nothing,
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nsfw = False, warning = Nothing}
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asObj = YAML.withMap "image info" \m -> do
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path <- m .: "path"
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download <- m .:? "download"
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nsfw <- m .:? "nsfw" .!= False
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warning <- m .:? "warning"
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pure $ Image {label = pathToLabel path, path, download, nsfw, warning}
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pathToLabel = Text.pack . dashToSpace . takeBaseName
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dashToSpace = map \case '-' -> ' '; c -> c
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instance FromYAML Link where
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parseYAML y = do
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Pair title rest <- parseYAML y
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asStr title rest <|> asObj title rest
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where
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asStr title = YAML.withStr "url" \url ->
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pure $ Link {title, url, nsfw = False}
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asObj title = YAML.withMap "link info" \m -> do
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url <- m .: "url"
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nsfw <- m .:? "nsfw" .!= False
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pure $ Link {title, url, nsfw}
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data GalleryInfo =
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GalleryInfo {
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title :: !Text,
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desc :: !Text,
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prefix :: !FilePath,
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filters :: !GalleryFilters,
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hidden :: !(HashSet Text) -- ^ tags to initially hide
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}
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deriving (Eq, Show)
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data GalleryFilters =
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GalleryFilters {
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nsfw :: !NsfwFilter,
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artist :: !ArtistFilter,
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require, exclude :: !(HashSet Text)
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}
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deriving (Eq, Show)
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data NsfwFilter = NoNsfw | OnlyNsfw | AllN deriving (Eq, Show)
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readNsfwFilter :: (IsString str, Eq str, Alternative f) => str -> f NsfwFilter
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readNsfwFilter "no" = pure NoNsfw
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readNsfwFilter "only" = pure OnlyNsfw
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readNsfwFilter "all" = pure AllN
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readNsfwFilter _ = empty
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matchNsfw :: NsfwFilter -> Info -> Bool
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matchNsfw NoNsfw i = #anySfw i && not (#nsfwOnly i)
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matchNsfw OnlyNsfw i = #anyNsfw i
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matchNsfw AllN _ = True
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instance FromYAML NsfwFilter where
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parseYAML = YAML.withStr "nsfw filter" readNsfwFilter
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data ArtistFilter = Me | NotMe | AllA deriving (Eq, Show)
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readArtistFilter :: (IsString str, Eq str, Alternative f)
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=> str -> f ArtistFilter
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readArtistFilter "me" = pure Me
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readArtistFilter "not-me" = pure NotMe
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readArtistFilter "all" = pure AllA
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readArtistFilter _ = empty
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matchArtist :: ArtistFilter -> Info -> Bool
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matchArtist Me = #mine
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matchArtist NotMe = #notMine
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matchArtist AllA = const True
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noFilters :: GalleryFilters
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noFilters =
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GalleryFilters {nsfw = AllN, artist = AllA, require = [], exclude = []}
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matchFilters :: GalleryFilters -> Info -> Bool
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matchFilters (GalleryFilters {nsfw, artist, require, exclude}) i =
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matchNsfw nsfw i && matchArtist artist i &&
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all (\t -> HashSet.member t tags) require &&
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all (\t -> not $ HashSet.member t tags) exclude
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where tags = HashSet.fromList $ #tags i
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instance FromYAML GalleryInfo where
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parseYAML = YAML.withMap "gallery info" \m ->
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GalleryInfo <$> m .: "title"
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<*> m .: "desc"
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<*> m .: "prefix"
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<*> m .:? "filters" .!= noFilters
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<*> m .:? "hidden" .!= mempty
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instance FromYAML GalleryFilters where
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parseYAML = YAML.withMap "gallery filters" \m ->
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GalleryFilters <$> m .:? "nsfw" .!= AllN
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<*> m .:? "artist" .!= AllA
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<*> m .:? "require" .!= []
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<*> m .:? "exclude" .!= []
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instance FromYAML ArtistFilter where
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parseYAML = YAML.withStr "artist filter" readArtistFilter
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data IndexInfo =
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IndexInfo {
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title :: !Text,
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desc :: !Text,
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galleries :: ![GalleryInfo],
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links :: ![Link],
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footer :: !(Maybe Text)
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}
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deriving Show
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instance FromYAML IndexInfo where
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parseYAML = YAML.withMap "index info" \m ->
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IndexInfo <$> m .: "title"
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<*> m .: "desc"
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<*> m .:? "galleries" .!= []
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<*> m .:? "links" .!= []
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<*> m .:? "footer"
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data Pair a b = Pair !a !b
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instance (FromYAML a, FromYAML b) => FromYAML (Pair a b) where
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parseYAML = YAML.withMap "single-pair map" \m ->
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case Map.toList m of
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[(a, b)] -> Pair <$> parseYAML a <*> parseYAML b
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_ -> fail "expected exactly one pair"
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instance FromYAML Day where
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parseYAML = YAML.withStr "date" \str ->
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case readMaybe $ Text.unpack str of
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Just d -> pure d
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Nothing -> fail $ "couldn't parse date " ++ show str
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instance {-# OVERLAPPING #-} FromYAML String where
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parseYAML y = Text.unpack <$> parseYAML y
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instance (FromYAML a, Eq a, Hashable a) => FromYAML (HashSet a) where
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parseYAML y = HashSet.fromList <$> parseYAML y
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