430 lines
13 KiB
Haskell
430 lines
13 KiB
Haskell
{-# OPTIONS_GHC -Wno-orphans #-}
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module Info
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(Info (..),
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tagsFor, descFor, imagesFor, linksFor, updatesFor, compareFor, sortFor,
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Artist (..), Image (..), Desc (..), DescField (..), Link (..), Update (..),
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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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Date (..), Day (..), Text)
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where
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import Date
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import Records
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import Control.Applicative
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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, fromMaybe)
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import Data.List (nub, sortBy)
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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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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 :: ![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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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 :: !Desc,
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nsfwDesc :: !Desc,
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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 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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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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data Update =
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Update {
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date :: !Date,
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desc :: !Text,
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nsfw :: !Bool
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}
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deriving (Eq, Ord, 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 "sfw" Update 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 "sfwUpdates" Info [Update] where
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getField = filter #sfw . #updates
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instance HasField "nsfwUpdates" Info [Update] where
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getField = filter #nsfw . #updates
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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 "latestDate" Info (Bool -> Date) where
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getField info@(Info {date}) nsfw =
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maximum $ date : map #date (updatesFor nsfw info)
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instance HasField "latestYear" Info (Bool -> Int) where
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getField info nsfw = #year $ #latestDate info nsfw
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instance HasField "updated" Info (Bool -> Bool) where
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getField (Info {updates, showUpdated}) nsfw = showUpdated && updated
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where updated = if nsfw then not $ null updates else any #sfw updates
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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 #name x == #name y then
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Just $ x {text = #text x <> #text y} : 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 -> [Text]
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tagsFor nsfw i = if nsfw then nub (#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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updatesFor :: Bool -> Info -> [Update]
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updatesFor nsfw = if nsfw then #updates else #sfwUpdates
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compareFor :: Bool -> Info -> Info -> Ordering
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compareFor nsfw = comparing \i -> (#latestDate i nsfw, #sortEx i, #title i)
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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 =
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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 .:? "sort" .!= ""
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<*> (m .:? "updates" >>= updateList)
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<*> m .:? "show-updated" .!= True
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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" .!= NoDesc
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<*> m .:? "nsfw-desc" .!= NoDesc
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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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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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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 = 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,
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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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let label = fromMaybe (pathToLabel path) label'
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pure $ Image {label, 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 =
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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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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) -> YAML.Parser [Update]
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updateList =
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maybe (pure []) $ YAML.withMap "updates" $ traverse asEither . Map.toList
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where
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asEither (date', rest) = do
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date <- parseYAML date'
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asDesc date rest <|> asObj date rest
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asDesc date = YAML.withStr "desc" \desc ->
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pure $ Update {date, desc, nsfw = False}
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asObj date = YAML.withMap "update info" \m -> do
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desc <- m .: "desc"
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nsfw <- m .:? "nsfw" .!= False
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pure $ Update {date, desc, 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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instance HasField "nsfw" GalleryInfo Bool where
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getField g = #nsfw (#filters g) /= 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 (#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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withPairM :: (FromYAML a, FromYAML b)
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=> (a -> b -> YAML.Parser c)
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-> (YAML.Node YAML.Pos -> YAML.Parser c)
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withPairM k y = parseYAML y >>= \(Pair a b) -> k a b
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withPair :: (FromYAML a, FromYAML b)
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=> (a -> b -> c)
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-> (YAML.Node YAML.Pos -> YAML.Parser c)
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withPair f = withPairM \a b -> pure $ f a b
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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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