gallery/make-pages/GalleryPage.hs

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{-# LANGUAGE TransformListComp #-}
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module GalleryPage (make) where
import Control.Exception
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import Data.Foldable
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import Data.Function (on, (&))
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import qualified Data.HashMap.Strict as HashMap
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import Data.HashSet (HashSet)
import qualified Data.HashSet as HashSet
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import Data.List (intersperse, groupBy, sortOn)
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import qualified Data.Text.Lazy as Lazy
import System.FilePath ((</>), takeDirectory, joinPath, splitPath)
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import GHC.Exts (Down (..), the)
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import BuilderQQ
import Depend (thumbFile)
import Info
newtype NoThumb = NoThumb FilePath
deriving stock Eq deriving anyclass Exception
instance Show NoThumb where show (NoThumb dir) = "no thumbnail for " ++ dir
make :: GalleryInfo -> [(FilePath, Info)] -> Lazy.Text
make ginfo infos = toLazyText $ make' ginfo infos
make' :: GalleryInfo -> [(FilePath, Info)] -> Builder
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make' (GalleryInfo {title, prefix, filters, hidden}) infos = [b|@0
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<!DOCTYPE html>
<html lang=en>
<meta charset=utf-8>
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<link rel=stylesheet href=/style/shiny/gallery.css title=shiny>
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<link rel=alternate href=rss.xml type=application/rss+xml>
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<script async src=/script/gallery.js></script>
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<title>$*title</title>
<header>
<h1>$*title</h1>
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<h2 class="right corner">
<a href=rss.xml>rss</a>
</h2>
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</header>
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<nav id=filters>
<details id=filters-details>
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<summary><h2>filters</h2></summary>
<div>
<h3>show only</h3>
<ul id=require class="buttonbar bb-choice">
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$8.requireFilters
</ul>
<h3>exclude</h3>
<ul id=exclude class="buttonbar bb-choice">
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$8.excludeFilters
</ul>
<a href=# id=clear>clear</a>
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<a href=# id=reset>default</a>
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</div>
</details>
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</nav>
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<main>
<ul class=grid>
$4.items
</ul>
</main>
<footer>
<a href=$@undir>all galleries</a>
</footer>
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|]
where
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items = map (uncurry $ makeYearItems nsfw) infosByYear
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infosByYear =
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[(the year, infopath) |
infopath@(_, info) <- infos,
then sortOn by Down info,
let year = #year info,
then group by Down year using groupBy']
groupBy' f = groupBy ((==) `on` f)
undir = joinPath (replicate (length (splitPath prefix)) "..")
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allTags = infos
& concatMap (map (,1) . tagsFor nsfw . #second)
& HashMap.fromListWith (+) & HashMap.toList
& sortOn (\(tag, count) -> (Down count, tag))
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requireFilters = map (uncurry $ makeFilter "require" mempty) allTags
excludeFilters = map (uncurry $ makeFilter "exclude" hidden) allTags
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nsfw = #nsfw filters /= NoNsfw
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makeFilter :: Text -> HashSet Text -> Text -> Int -> Builder
makeFilter prefix initial tag _count = [b|@8
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<li>
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<input type=checkbox id="$id'" value="$*tag"$checked>
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<label for="$id'">$*tag</label>
|]
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where
id' = [b|$*prefix$&_$tag'|]
tag' = escId tag
checked = if HashSet.member tag initial then " checked" else ""
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makeYearItems :: Bool -- ^ nsfw
-> Integer -- ^ year
-> [(FilePath, Info)]
-> Builder
makeYearItems nsfw year infos = [b|@4
<li class="item year-marker">
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<span class=year-text>$year'</span>
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$4.items
|]
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where
items = map (uncurry $ makeItem nsfw) infos
year' = show year & foldMap \c -> [b|<span class=y>$'c</span>|]
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makeItem :: Bool -> FilePath -> Info -> Builder
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makeItem nsfw file info@(Info {title}) = [b|@4
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<li class="item post$nsfw'" data-tags="$tags'">
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<figure>
<a href="$@dir">
<img src="$@thumb">
</a>
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<figcaption>$*title</figcaption>
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</figure>
|]
where
dir = takeDirectory file
thumb = maybe (throw $ NoThumb dir) (\t -> dir </> thumbFile t) $ #thumb info
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nsfw' = if nsfw && #anyNsfw info then " nsfw" else ""
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tags' = fold $ intersperse ";" $ map fromText $ tagsFor nsfw info