69 lines
2.7 KiB
Haskell
69 lines
2.7 KiB
Haskell
{-# LANGUAGE ApplicativeDo, DataKinds, NamedFieldPuns #-}
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{-# LANGUAGE DerivingVia, LambdaCase, TypeApplications #-}
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module Utilities where
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import Data.Text (Text)
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import Development.Shake.FilePath ((<.>), (</>))
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import qualified Data.Text as T
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import qualified Development.Shake as Shake
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import qualified Development.Shake.FilePath as Shake
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import qualified Text.Pandoc as Pandoc
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import Config
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import Development.Shake (Action)
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import Text.Pandoc
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import Data.Aeson as A
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import Data.Time (UTCTime(UTCTime), formatTime, defaultTimeLocale, parseTimeM)
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import Types
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import Data.Maybe (fromJust)
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indexHtmlOutputPath :: FilePath -> FilePath
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indexHtmlOutputPath srcPath =
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outputDir </> Shake.dropExtension srcPath </> "index.html"
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indexHtmlSourcePath :: FilePath -> FilePath
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indexHtmlSourcePath =
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Shake.dropDirectory1
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. (<.> "typ")
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. Shake.dropTrailingPathSeparator
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. Shake.dropFileName
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typstToHtml :: FilePath -> Action (Post, Text)
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typstToHtml filePath = do
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content <- Shake.readFile' filePath
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Shake.quietly . Shake.traced "Typst to HTML" $ do
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doc@(Pandoc meta _) <- runPandoc . Pandoc.readTypst readerOptions . T.pack $ content
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meta' <- fromMeta meta
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let dateTransformedMeta = dateTransform meta'
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html <- runPandoc . Pandoc.writeHtml5String writerOptions $ doc
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return (fromJust dateTransformedMeta, html)
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where
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readerOptions =
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Pandoc.def {Pandoc.readerExtensions = Pandoc.pandocExtensions}
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writerOptions =
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Pandoc.def {Pandoc.writerExtensions = Pandoc.pandocExtensions}
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fromMeta (Meta meta) =
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A.fromJSON . A.toJSON <$> traverse metaValueToJSON meta >>= \case
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Success res -> pure res
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Error err -> fail $ "json conversion error:" <> err
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metaValueToJSON = \case
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MetaMap m -> A.toJSON <$> traverse metaValueToJSON m
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MetaList m -> A.toJSONList <$> traverse metaValueToJSON m
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MetaBool m -> pure $ A.toJSON m
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MetaString m -> pure $ A.toJSON $ T.strip m
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MetaInlines m -> metaValueToJSON $ MetaBlocks [Plain m]
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MetaBlocks m ->
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fmap (A.toJSON . T.strip)
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. runPandoc
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. Pandoc.writePlain Pandoc.def
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$ Pandoc mempty m
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runPandoc action =
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Pandoc.runIO (Pandoc.setVerbosity Pandoc.ERROR >> action)
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>>= either (fail . show) return
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dateTransform post@(Post{postDate}) = do
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postDate' <- dateStrTransform $ T.unpack $ fromJust postDate
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Just post {
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postDate = Just postDate'
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}
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dateStrTransform date = do
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date' <- parseTimeM False defaultTimeLocale "%Y-%-m-%-d" date
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Just $ T.pack $ formatTime @UTCTime defaultTimeLocale "%b %e, %Y" date'
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