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module SinglePage (make) where
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2020-07-07 23:28:09 -04:00
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import Info hiding (Text)
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2020-07-11 23:40:14 -04:00
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import Control.Exception
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2020-07-07 23:28:09 -04:00
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import qualified Data.Text as Strict
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import qualified Data.Text.Lazy as Lazy
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import Data.Text.Lazy.Builder
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import Data.Time (formatTime, defaultTimeLocale)
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import Data.Maybe (fromMaybe)
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import qualified Data.Char as Char
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import qualified Data.List as List
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-- | only nsfw images are present for a non-nsfw page
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data NoEligibleImages = NoEligibleImages {title :: !Strict.Text}
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deriving stock Eq deriving anyclass Exception
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instance Show NoEligibleImages where
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show (NoEligibleImages {title}) =
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Strict.unpack title <> ": no images selected\n" <>
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" (probably a nsfw-only work without --nsfw set)"
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make :: Bool -> Info -> Lazy.Text
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make includeNsfw = toLazyText . make' includeNsfw
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make' :: Bool -> Info -> Builder
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make' includeNsfw (Info {date, title, tags, nsfwTags,
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description, images, links}) =
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"<!DOCTYPE html>\n" <>
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"<html lang=en>\n" <>
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"<meta charset=utf-8>\n" <>
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"<link href=single.css rel=stylesheet>\n\n" <>
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ifJust title (\t -> "<title>" <> esc t <> "</title>\n\n") <>
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"<header>\n" <>
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ifJust title (\t -> " <h1>" <> esc t <> "</h1>\n") <>
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" <h2 class=date>" <> formatDate date <> "</h2>\n" <>
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buttonBar title' includeNsfw images <>
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"</header>\n\n" <>
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"<main>\n" <>
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" <img id=it src=\"" <> path0 <> "\">\n\n" <>
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ifJust description (\d ->
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" <div class=desc>\n" <>
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" <h2>description</h2>\n" <>
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indent 4 d <>
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" </div>\n") <> "\n" <>
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makeTags includeNsfw tags nsfwTags <>
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extLinks includeNsfw links <>
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"</main>\n\n" <>
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"<footer>\n" <>
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" <nav class=back>\n" <>
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" <a href=../>back to gallery</a>\n" <>
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" </nav>\n" <>
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"</footer>\n"
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where
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path0' = let Image {path} = head images in path
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path0 = fromText path0'
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title' = fromMaybe path0' title
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ifJust :: Monoid b => Maybe a -> (a -> b) -> b
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ifJust x f = maybe mempty f x
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esc :: Strict.Text -> Builder
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esc = foldMap esc1 . Strict.unpack where
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esc1 '<' = "<"
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esc1 '>' = ">"
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esc1 '&' = "&"
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esc1 '"' = """
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esc1 '\'' = "&squot;"
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esc1 c = singleton c
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formatDate :: Day -> Builder
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formatDate = fromString . formatTime defaultTimeLocale "%e %#B %Y"
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buttonBar :: Strict.Text -> Bool -> [Image] -> Builder
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buttonBar title includeNsfw allImages =
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if null images then
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throw $ NoEligibleImages title
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else if length images == 1 then
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mempty
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else
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" <nav id=variants class=buttonbar>\n" <>
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" <h2>alts</h2>\n" <>
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" <ul id=variantlist>\n" <>
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List.foldl' (\b (i, im) -> b <> altButton i im) mempty iimages <>
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" </ul>\n" <>
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" </nav>\n"
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where
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images | includeNsfw = allImages
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| otherwise = filter (\Image {nsfw} -> not nsfw) allImages
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iimages = zip [0..] images
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altButton :: Int -> Image -> Builder
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altButton i (Image {label, path, nsfw}) =
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" <li" <> nsfwClass <> ">\n" <>
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" <input type=radio " <> checked <> "id=\"" <> idLabel <> "\" " <>
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"name=variant autocomplete=off\n" <>
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" value=\"" <> fromText path <> "\">\n" <>
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" <label for=\"" <> idLabel <> "\">" <> fromText label <> "</label>\n"
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where
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nsfwClass = if nsfw then " class=nsfw" else ""
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checked = if i == 0 then "checked " else ""
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idLabel = escId label
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escId :: Strict.Text -> Builder
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escId = foldMap esc1 . Strict.unpack where
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esc1 c
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| Char.isSpace c = ""
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| c < 'ÿ' && not (Char.isAlphaNum c || c == '-') = "_"
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| otherwise = singleton c
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indent :: Int -> Strict.Text -> Builder
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indent n txt = spaces <> go (Strict.unpack txt) where
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go "" = mempty
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go "\n" = "\n"
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go ('\n':cs) = singleton '\n' <> spaces <> go cs
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go (c:cs) = singleton c <> go cs
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spaces = fromString $ replicate n ' '
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makeTags :: Bool -> [Strict.Text] -> [Strict.Text] -> Builder
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makeTags includeNsfw sfwTags nsfwTags =
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if null tags then mempty else
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" <div class=tags>\n" <>
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" <h2>tags</h2>\n" <>
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" <ul>\n" <> foldMap makeTag tags <> " </ul>\n" <>
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" </div>\n\n"
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where
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tags = List.nub $ if includeNsfw then sfwTags else sfwTags <> nsfwTags
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makeTag t = " <li>" <> fromText t <> "\n"
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extLinks :: Bool -> [Link] -> Builder
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extLinks includeNsfw links =
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let links' =
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if includeNsfw then links
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else filter (\Link {nsfw} -> not nsfw) links in
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if null links' then mempty else
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" <div class=links>\n" <>
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" <h2>links</h2>\n" <>
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" <ul>\n" <>
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foldMap extLink links' <>
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" </ul>\n" <>
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" </div>\n"
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extLink :: Link -> Builder
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extLink (Link {title, url}) =
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" <li>\n" <>
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" <a href=\"" <> fromText url <> "\">\n" <>
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" " <> fromText title <> "\n" <>
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" </a>\n"
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