559 lines
18 KiB
Haskell
559 lines
18 KiB
Haskell
{-# OPTIONS_GHC -fdefer-typed-holes #-}
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{-# OPTIONS_GHC -Wno-orphans #-}
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module Info
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(Info (..),
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anySfw, anyNsfw, allSfw, allNsfw,
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allImages, sfwImages, nsfwImages,
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thumb, latestDateFor, latestYearFor,
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sfwLinks, nsfwLinks, sfwUpdates, nsfwUpdates,
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updatesFor, bigUpdatesFor, hasUpdatesFor, lastUpdateFor,
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tagsFor, descFor, imagesFor, linksFor,
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CompareKey (..), compareKeyFor, compareFor, sortFor,
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Artist (..), Images' (..), Images, Image (..), Desc (..), DescField (..),
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PreviewImage (..), previewImage,
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Link (..), Update (..), Bg (..),
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GalleryInfo (..), GalleryFilters (..), ArtistFilter (..), NsfwFilter (..),
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readArtistFilter, matchArtist, readNsfwFilter, matchNsfw, matchFilters,
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IndexInfo (..),
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NoThumb (..), getThumb, thumbFile, pageFile, bigFile,
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-- ** Reexports
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Date (..), Day (..), Text, NonEmpty (..))
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where
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import Date
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import GHC.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.Set (Set, (\\))
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import qualified Data.Set as Set
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import Data.Maybe (isJust, isNothing, fromMaybe, mapMaybe, catMaybes)
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import Data.List (sortBy)
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import Data.List.NonEmpty (NonEmpty (..), toList, nonEmpty)
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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.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 Data.Semigroup
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data Info =
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Info {
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date :: !Date,
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-- | extra sort key after date
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-- e.g. multiple things on the same day might have a,b,c in @sortEx@ to
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-- put them in the right order in the gallery
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sortEx :: !Text,
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updates :: ![(Date, NonEmpty Update)],
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-- | if false, don't show updated emblem even if @updates@ is non-empty
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showUpdated :: !Bool,
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-- | hide from gallery view
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unlisted :: !Bool,
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title :: !Text,
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galleryTitle :: !(Maybe Text),
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artist :: !(Maybe Artist), -- nothing = me, obv
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nsfwOnly :: !Bool,
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tags :: !(HashSet Text),
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nsfwTags :: !(HashSet Text),
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desc :: !Desc,
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nsfwDesc :: !Desc,
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bg :: !Bg,
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images :: !Images,
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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 Bg = Default | NoBorder | Other !Text
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deriving (Eq, Show)
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data Desc =
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NoDesc
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| TextDesc !Text
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| LongDesc ![DescField]
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deriving (Eq, Show)
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data DescField = DescField {name, text :: !Text}
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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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desc :: !Text,
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nsfw :: !Bool,
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warning :: !(Maybe Text),
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resize :: !Bool
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}
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deriving (Eq, Show)
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data Images' a =
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Uncat (NonEmpty a) -- ^ uncategorised
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| Cat (NonEmpty (Text, NonEmpty a)) -- ^ categorised
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deriving (Eq, Show, Functor, Foldable, Traversable)
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type Images = Images' Image
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data PreviewImage = PFull Image | PThumb FilePath
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previewImage :: Info -> Maybe PreviewImage
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previewImage info
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| Just img <- find (.sfw) $ allImages info.images = Just $ PFull img
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| otherwise = PThumb <$> info.thumb'
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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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data Update =
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Update {
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desc :: !Text,
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nsfw :: !Bool,
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ignoreSort :: !Bool
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}
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deriving (Eq, Ord, Show)
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instance HasField "sfw" Image Bool where getField i = not i.nsfw
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instance HasField "sfw" Link Bool where getField i = not i.nsfw
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instance HasField "sfw" Update Bool where getField i = not i.nsfw
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allImages :: Images' a -> NonEmpty a
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allImages (Uncat is) = is
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allImages (Cat cats) = sconcat $ fmap snd cats
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filterNE :: (a -> Bool) -> NonEmpty a -> Maybe (NonEmpty a)
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filterNE p = nonEmpty . filter p . toList
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catMaybesNE :: NonEmpty (Maybe a) -> Maybe (NonEmpty a)
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catMaybesNE = nonEmpty . catMaybes . toList
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filterImages :: (a -> Bool) -> Images' a -> Maybe (Images' a)
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filterImages p (Uncat is) = Uncat <$> filterNE p is
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filterImages p (Cat cats) =
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fmap Cat $ catMaybesNE $ fmap (traverse $ filterNE p) cats
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sfwImages, nsfwImages :: Info -> Maybe Images
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sfwImages i = filterImages (.sfw) i.images
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nsfwImages i = filterImages (.nsfw) i.images
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anySfw, anyNsfw, allSfw, allNsfw :: Info -> Bool
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anySfw = isJust . sfwImages
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anyNsfw = isJust . nsfwImages
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allSfw = not . anyNsfw
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allNsfw = not . anySfw
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sfwLinks, nsfwLinks :: Info -> [Link]
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sfwLinks i = filter (.sfw) i.links
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nsfwLinks i = filter (.nsfw) i.links
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updatesWith :: (Update -> Bool) -> Info -> [(Date, NonEmpty Update)]
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updatesWith p i = mapMaybe (traverse $ filterNE p) i.updates
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updatesFor :: Bool -> Info -> [(Date, NonEmpty Update)]
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updatesFor nsfw = updatesWith \u -> nsfw || u.sfw
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bigUpdatesFor :: Bool -> Info -> [(Date, NonEmpty Update)]
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bigUpdatesFor nsfw = updatesWith \u -> not u.ignoreSort && (nsfw || u.sfw)
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sfwUpdates, nsfwUpdates :: Info -> [(Date, NonEmpty Update)]
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sfwUpdates = updatesWith (.sfw)
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nsfwUpdates = updatesWith (.nsfw)
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lastUpdateFor :: Bool -> Info -> Maybe Date
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lastUpdateFor nsfw info = case updatesFor nsfw info of
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[] -> Nothing
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us -> Just $ fst $ last us
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thumb :: Info -> Maybe FilePath
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thumb (Info {thumb', images}) =
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thumb' <|> (.path) <$> find (.sfw) (allImages images)
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latestDateFor :: Bool -> Info -> Date
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latestDateFor nsfw i = maximum $ i.date : mapMaybe relDate (updatesFor nsfw i)
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where
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relDate (date, us) = date <$ guard (not $ null us || all (.ignoreSort) us)
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latestYearFor :: Bool -> Info -> Int
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latestYearFor nsfw info = (latestDateFor nsfw info).year
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hasUpdatesFor :: Bool -> Info -> Bool
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hasUpdatesFor i nsfw = not $ null $ updatesFor i nsfw
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defDescKey :: Text
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defDescKey = "about"
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instance Semigroup Desc where
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NoDesc <> d2 = d2
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d1 <> NoDesc = d1
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(TextDesc t1) <> (TextDesc t2) = TextDesc $ t1 <> t2
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(LongDesc m1) <> (TextDesc t2) = LongDesc $ m1 <> [DescField defDescKey t2]
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(TextDesc t1) <> (LongDesc m2) = LongDesc $ [DescField defDescKey t1] <> m2
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(LongDesc m1) <> (LongDesc m2) = LongDesc $ merge m1 m2
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merge :: [DescField] -> [DescField] -> [DescField]
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merge fs1 fs2 = go fs1 [] fs2 where
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go first unused [] = first <> reverse unused
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go first unused (x:xs) =
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case insert first x of
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Just first' -> go first' unused xs
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Nothing -> go first (x:unused) xs
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insert [] _ = Nothing
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insert (x:xs) y =
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if x.name == y.name then
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Just $ x {text = x.text <> y.text} : xs
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else
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(x :) <$> insert xs y
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instance Monoid Desc where
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mempty = NoDesc
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mappend = (<>)
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instance HasField "exists" Desc Bool where
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getField d = d /= NoDesc
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descFor :: Bool -> Info -> Desc
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descFor nsfw (Info {desc, nsfwDesc}) = if nsfw then desc <> nsfwDesc else desc
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tagsFor :: Bool -> Info -> HashSet Text
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tagsFor nsfw i = if nsfw then i.tags <> i.nsfwTags else i.tags
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imagesFor :: Bool -> Info -> Maybe Images
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imagesFor nsfw i = if nsfw then Just i.images else sfwImages i
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linksFor :: Bool -> Info -> [Link]
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linksFor nsfw i = if nsfw then i.links else sfwLinks i
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data CompareKey = MkCompareKey !Date !Text !Text
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deriving (Eq, Ord)
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compareKeyFor :: Bool -> Info -> CompareKey
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compareKeyFor nsfw i = MkCompareKey (latestDateFor nsfw i) i.sortEx i.title
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compareFor :: Bool -> Info -> Info -> Ordering
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compareFor nsfw = comparing $ compareKeyFor nsfw
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sortFor :: Bool -> [Info] -> [Info]
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sortFor = sortBy . compareFor
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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 = 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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canResize :: Image -> Bool
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canResize i = i.resize && takeExtension i.path /= ".gif"
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pageFile :: Image -> FilePath
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pageFile img =
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if canResize img then addSuffix "_med" img.path else img.path
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bigFile :: Image -> FilePath
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bigFile img =
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if canResize img then addSuffix "_big" img.path else img.path
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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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getKeys :: YAML.Mapping YAML.Pos -> YAML.Parser (Set Text)
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getKeys = fmap Set.fromList . traverse (YAML.withStr "key" pure) . Map.keys
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checkKeys :: YAML.Mapping YAML.Pos -> Set Text -> YAML.Parser ()
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checkKeys mapping wanted = do
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keys <- getKeys mapping
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let unused = Set.toList $ keys \\ wanted
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unless (null unused) do
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fail $ "unused keys: " <> show unused <> "\n" <>
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"expected: " <> show wanted
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instance FromYAML Info where
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parseYAML = YAML.withMap "info" \m -> do
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checkKeys m ["date", "sort", "updates", "show-updated", "unlisted",
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"gallery-title", "title", "artist", "nsfw-only", "tags",
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"nsfw-tags", "desc", "nsfw-desc", "bg", "images", "thumb",
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"links", "extras"]
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Info <$> m .: "date"
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<*> m .:? "sort" .!= ""
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<*> (m .:? "updates" >>= updateList)
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<*> m .:? "show-updated" .!= True
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<*> m .:? "unlisted" .!= False
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<*> m .: "title"
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<*> m .:? "gallery-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" .!= NoDesc
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<*> m .:? "nsfw-desc" .!= NoDesc
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<*> m .:? "bg" .!= Default
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<*> m .: "images"
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<*> m .:? "thumb"
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<*> m .:? "links" .!= []
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<*> m .:? "extras" .!= []
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instance FromYAML Bg where
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parseYAML y =
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YAML.withNull "default value" (pure Default) y
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<|> YAML.withStr "css <image> or \"noborder\""
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(\str -> pure if str == "noborder" then NoBorder else Other str) y
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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 -> do
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checkKeys m ["name", "url"]
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Artist <$> m .: "name" <*> m .:? "url"
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instance FromYAML Desc where
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parseYAML y = textDesc y <|> mapDesc y where
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textDesc = YAML.withStr "text" $ pure . TextDesc
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mapDesc = fmap LongDesc . parseYAML
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instance FromYAML DescField where parseYAML = withPair DescField
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parseYAMLNE :: FromYAML a => YAML.Node YAML.Pos -> YAML.Parser (NonEmpty a)
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parseYAMLNE = YAML.withSeq "non-empty sequence" \ys ->
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case nonEmpty ys of
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Just ys' -> traverse YAML.parseYAML ys'
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Nothing -> fail "expected non-empty sequence"
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imageList :: YAML.Node YAML.Pos -> YAML.Parser (NonEmpty Image)
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imageList y = pure <$> unlabelledImage y <|> parseYAMLNE 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 = withPairM \label -> unlabelledImage' (Just label)
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unlabelledImage :: YAML.Node YAML.Pos -> YAML.Parser Image
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unlabelledImage = unlabelledImage' Nothing
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unlabelledImage' :: Maybe Text -> YAML.Node YAML.Pos -> YAML.Parser Image
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unlabelledImage' label' 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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let label = fromMaybe (pathToLabel path) label' in
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pure $ Image {label, path, download = Nothing, desc = "",
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nsfw = False, warning = Nothing, resize = True}
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asObj = YAML.withMap "image info" \m -> do
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checkKeys m ["path", "download", "desc", "nsfw", "warning", "resize"]
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path <- m .: "path"
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download <- m .:? "download"
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desc <- m .:? "desc" .!= ""
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nsfw <- m .:? "nsfw" .!= False
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warning <- m .:? "warning"
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resize <- m .:? "resize" .!= True
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let label = fromMaybe (pathToLabel path) label'
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pure $ Image {label, path, download, nsfw, warning, desc, resize}
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pathToLabel = Text.pack . gapToSpace . takeBaseName
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gapToSpace = map \case '-' -> ' '; '_' -> ' '; c -> c
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instance FromYAML Images where
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parseYAML y = Uncat <$> imageList y
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<|> Cat <$> YAML.withSeq "list of categories" fromPairs y
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where
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fromPairs (nonEmpty -> Just xs) =
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traverse (withPairM \label -> fmap (label,) . imageList) xs
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fromPairs _ = YAML.typeMismatch "non-empty list" y
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instance FromYAML Link where
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parseYAML =
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withPairM \title rest -> 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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checkKeys m ["url", "nsfw"]
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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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updateList :: Maybe (YAML.Node YAML.Pos) ->
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YAML.Parser [(Date, NonEmpty Update)]
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updateList =
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maybe (pure []) $ YAML.withMap "updates" $ traverse bodies . Map.toList
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where
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bodies (date', rest) = (,) <$> parseYAML date' <*> body rest
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body b = return <$> body1 b <|> YAML.withSeq "update list" (bodyN b) b
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body1 b = asDesc b <|> asObj b
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bodyN y =
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maybe (YAML.typeMismatch "non-empty list" y) (traverse body1) . nonEmpty
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asDesc = YAML.withStr "desc" \desc ->
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pure $ Update {desc, nsfw = False, ignoreSort = False}
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asObj = YAML.withMap "update info" \m -> do
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checkKeys m ["desc", "nsfw", "ignore-sort"]
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desc <- m .: "desc"
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nsfw <- m .:? "nsfw" .!= False
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ignoreSort <- m .:? "ignore-sort" .!= False
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pure $ Update {desc, nsfw, ignoreSort}
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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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instance HasField "nsfw" GalleryInfo Bool where
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getField g = g.filters.nsfw /= NoNsfw
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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 i.nsfwOnly
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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 i = isNothing i.artist
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matchArtist NotMe i = isJust i.artist
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matchArtist AllA _ = True
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|
noFilters :: GalleryFilters
|
|
noFilters =
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|
GalleryFilters {nsfw = AllN, artist = AllA, require = [], exclude = []}
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|
|
|
matchFilters :: GalleryFilters -> Info -> Bool
|
|
matchFilters (GalleryFilters {nsfw, artist, require, exclude}) i =
|
|
matchNsfw nsfw i && matchArtist artist i &&
|
|
all (\t -> HashSet.member t i.tags) require &&
|
|
all (\t -> not $ HashSet.member t i.tags) exclude
|
|
|
|
|
|
instance FromYAML GalleryInfo where
|
|
parseYAML = YAML.withMap "gallery info" \m -> do
|
|
checkKeys m ["title", "desc", "prefix", "filters", "hidden"]
|
|
GalleryInfo <$> m .: "title"
|
|
<*> m .: "desc"
|
|
<*> m .: "prefix"
|
|
<*> m .:? "filters" .!= noFilters
|
|
<*> m .:? "hidden" .!= mempty
|
|
|
|
instance FromYAML GalleryFilters where
|
|
parseYAML = YAML.withMap "gallery filters" \m -> do
|
|
checkKeys m ["nsfw", "artist", "require", "exclude"]
|
|
GalleryFilters <$> m .:? "nsfw" .!= AllN
|
|
<*> m .:? "artist" .!= AllA
|
|
<*> m .:? "require" .!= []
|
|
<*> m .:? "exclude" .!= []
|
|
|
|
instance FromYAML ArtistFilter where
|
|
parseYAML = YAML.withStr "artist filter" readArtistFilter
|
|
|
|
|
|
data IndexInfo =
|
|
IndexInfo {
|
|
title :: !Text,
|
|
desc :: !Text,
|
|
galleries :: ![GalleryInfo],
|
|
links :: ![Link],
|
|
footer :: !(Maybe Text)
|
|
}
|
|
deriving Show
|
|
|
|
instance FromYAML IndexInfo where
|
|
parseYAML = YAML.withMap "index info" \m -> do
|
|
checkKeys m ["title", "desc", "galleries", "links", "footer"]
|
|
IndexInfo <$> m .: "title"
|
|
<*> m .: "desc"
|
|
<*> m .:? "galleries" .!= []
|
|
<*> m .:? "links" .!= []
|
|
<*> m .:? "footer"
|
|
|
|
|
|
data Pair a b = Pair !a !b
|
|
|
|
instance (FromYAML a, FromYAML b) => FromYAML (Pair a b) where
|
|
parseYAML = YAML.withMap "single-pair map" \m ->
|
|
case Map.toList m of
|
|
[(a, b)] -> Pair <$> parseYAML a <*> parseYAML b
|
|
_ -> fail "expected exactly one pair"
|
|
|
|
withPairM :: (FromYAML a, FromYAML b)
|
|
=> (a -> b -> YAML.Parser c)
|
|
-> (YAML.Node YAML.Pos -> YAML.Parser c)
|
|
withPairM k y = parseYAML y >>= \(Pair a b) -> k a b
|
|
|
|
withPair :: (FromYAML a, FromYAML b)
|
|
=> (a -> b -> c)
|
|
-> (YAML.Node YAML.Pos -> YAML.Parser c)
|
|
withPair f = withPairM \a b -> pure $ f a b
|
|
|
|
|
|
instance {-# OVERLAPPING #-} FromYAML String where
|
|
parseYAML y = Text.unpack <$> parseYAML y
|
|
|
|
instance (FromYAML a, Eq a, Hashable a) => FromYAML (HashSet a) where
|
|
parseYAML y = HashSet.fromList <$> parseYAML y
|