~yoctocell/yoctocell.xyz

ref: 5a6846b9acba7013857e815187435743f96a78c7 yoctocell.xyz/app/Main.hs -rw-r--r-- 7.0 KiB
5a6846b9Xinglu Chen app: Generate post list for gemini 1 year, 7 months ago
                                                                                
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{-# LANGUAGE OverloadedStrings #-}
import           Data.Char                      ( toLower
                                                , toUpper
                                                )
import           Data.List                      ( isPrefixOf )
import           Data.List.Split                ( splitOn )
import           Data.Maybe
import           Data.Semigroup                 ( (<>) )
import           System.FilePath.Posix          ( (</>)
                                                , joinPath
                                                , replaceExtension
                                                , splitDirectories
                                                , splitPath
                                                , takeDirectory
                                                , takeFileName
                                                )

import           Hakyll
import           Hakyll.Core.Identifier         ( toFilePath )
import           Hakyll.Core.Item               ( Item(..) )
import           Hakyll.Web.Template.Context

config :: Configuration
config = defaultConfiguration { destinationDirectory = "public" }

baseUrl :: String
baseUrl = "https://git.sr.ht/~yoctocell/yoctocell.xyz/tree/master/item/src"

geminiUrl :: String
geminiUrl = "gemini://yoctocell.xyz"

feedConfiguration :: FeedConfiguration
feedConfiguration = FeedConfiguration
  { feedTitle       = "yoctocell's blog"
  , feedDescription = "Blog posts by yoctocell"
  , feedAuthorName  = "yoctocell"
  , feedAuthorEmail = "public@yoctocell.xyz"
  , feedRoot        = "https://yoctocell.xyz"
  }

context :: Context String
context = defaultContext `mappend` sourceContext

geminiContext :: Context String
geminiContext = geminiUrlContext `mappend` titleField "title"

main :: IO ()
main = hakyllWith config $ do
  match "src/media" $ do
    route srcRoute
    compile copyFileCompiler

  match "src/css/*" $ do
    route srcRoute
    compile compressCssCompiler

  match "src/posts/*.gmi" $ do
    route srcRoute
    compile $ getResourceString >>= loadAndApplyTemplate
      "src/templates/default.gmi"
      (bodyField "body")

  -- TODO: Sort chronologically
  -- TODO: Use real title
  match "src/index.gmi" $ do
    route srcRoute
    compile $ do
      posts <- loadAll "src/posts/*.gmi"
      let geminiContext =
            listField "posts" geminiContext (return posts)
              `mappend` (bodyField "body")
              `mappend` (titleField "title")
              `mappend` geminiUrlContext

      getResourceString
        >>= loadAndApplyTemplate "src/templates/index.gmi" geminiContext

  match (fromList ["src/about.org", "src/contact.org"]) $ do
    route $ setExtension' "html"
    compile
      $   pandocCompiler
      >>= loadAndApplyTemplate "src/templates/default.html" context
      >>= relativizeUrls

  match "src/posts/*.org" $ do
    route tempRoute
    compile $ getResourceString >>= orgCompiler

  create ["archive.html"] $ do
    route idRoute
    compile $ do
      posts <- recentFirst =<< loadAll "_temp/src/posts/*"
      let archiveCtx =
            listField "posts" postCtx (return posts)
              `mappend` constField "title" "Archives"
              `mappend` context

      makeItem ""
        >>= loadAndApplyTemplate "src/templates/archive.html" archiveCtx
        >>= loadAndApplyTemplate "src/templates/default.html" archiveCtx
        >>= relativizeUrls

  match "src/index.org" $ do
    route tempRoute
    compile $ getResourceString >>= orgCompiler

  match "_temp/src/index.org" $ do
    route $ cleanRouteFromTemp
    compile $ do
      posts <- recentFirst =<< loadAll "_temp/src/posts/*"
      let indexCtx = listField "posts" postCtx (return posts) `mappend` context

      pandocCompiler
        >>= applyAsTemplate indexCtx
        >>= loadAndApplyTemplate "src/templates/default.html" indexCtx
        >>= relativizeUrls

  match blogPattern $ do
    route cleanRouteFromTemp
    compile
      $   do
            pandocCompiler
      >>= saveSnapshot "content"
      >>= loadAndApplyTemplate "src/templates/post.html"    postCtx
      >>= loadAndApplyTemplate "src/templates/default.html" context
      >>= relativizeUrls

  create ["atom.xml"] $ do
    route idRoute
    compile $ do
      posts <- fmap (take 10) . recentFirst =<< loadAllSnapshots
        "_temp/src/posts/*.org"
        "content"
      renderAtom feedConfiguration feedCtx posts

  match "src/templates/*" $ compile templateBodyCompiler


-- | Contexts
-- Add @date@ and @modified@ fields.
postCtx :: Context String
postCtx =
  dateField "date" "%Y-%m-%d"
    `mappend` modificationTimeField "modified" "%Y-%m-%d"
    `mappend` defaultContext

feedCtx :: Context String
feedCtx = postCtx <> bodyField "description"

-- | Return the url for the source code, this reads the @baseUrl@
-- variable.  Based on @urlField@.
sourceContext :: Context String
sourceContext = field "source" $ \i -> do
  let id     = itemIdentifier i
      empty' = fail $ "No route url found for item " ++ show id
  flip replaceExtension ".org"
    <$> mappend baseUrl
    <$> maybe empty' toUrl
    <$> getRoute id

geminiUrlContext :: Context String
geminiUrlContext = field "geminiUrl" $ \i -> do
  let id     = itemIdentifier i
      empty' = fail "No route url found for item " ++ show id
  mappend geminiUrl <$> maybe empty' toUrl <$> getRoute id

-- geminiTitleContext :: Context String
-- geminiTitleContext = title' "geminiTitle"
--  where
--   title' :: String -> Context a
--   title' = mapContext (fmap hyphenToSpace) . takeBaseName . pathField
--   hyphenToSpace :: Char -> Char
--   hyphenToSpace '-' = ' '
--   hyphenToSpace c   = c

-- | From org get metadatas.
orgCompiler :: Item String -> Compiler (Item String)
orgCompiler = pure . fmap (\s -> (metadatasToStr . orgMetadatas) s ++ s)

orgMetadatas :: String -> [String]
orgMetadatas = map (format . lower . clean) . takeWhile (/= "") . lines
 where
  clean = concat . splitOn "#+"
  lower s = (map toLower . takeWhile (/= ':')) s ++ dropWhile (/= ':') s
  format xs
    | -- drop weekday str. 2018-05-03 Thu -> 2018-05-03
      "date" `isPrefixOf` xs
    = take 16 . concat . splitOn ">" . concat . splitOn "<" $ xs
    | otherwise
    = xs

metadatasToStr :: [String] -> String
metadatasToStr = ("----------\n" ++) . (++ "----------\n") . unlines

-- | Custom Routes
-- | srcRoute "src/index.org" == "public/index.org"
srcRoute :: Routes
srcRoute = customRoute srcRoute'
  where srcRoute' i = joinPath $ tail $ (splitPath $ toFilePath i)

setExtension' :: String -> Routes
setExtension' extension =
  customRoute
    $ (`replaceExtension` extension)
    . joinPath
    . tail
    . splitPath
    . toFilePath

-- | Temp Route
tempRoute :: Routes
tempRoute = customRoute tempRoute'
  where tempRoute' i = ".." </> "_temp" </> toFilePath i

cleanRouteFromTemp :: Routes
cleanRouteFromTemp = customRoute createIndexRoute
 where
  createIndexRoute ident =
    joinPath
      . tail
      . tail
      . splitDirectories
      . (flip replaceExtension "html")
      $ toFilePath ident

blogPattern :: Pattern
blogPattern = "_temp/src/posts/*.org"