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{-# LANGUAGE OverloadedStrings #-}
import           Data.Monoid ((<>))
import           Hakyll


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main :: IO ()
main = hakyll $ do
    match "images/*" $ do
        route   idRoute
        compile copyFileCompiler

    match "css/*" $ do
        route   idRoute
        compile compressCssCompiler

    match (fromList ["about.rst", "contact.markdown"]) $ do
        route   $ setExtension "html"
        compile $ pandocCompiler
            >>= loadAndApplyTemplate "templates/default.html" defaultContext
            >>= relativizeUrls

    match "log/*.org" $ do
        route $ setExtension "html"
        compile $ pandocCompiler
            >>= loadAndApplyTemplate "templates/post.html" postCtx
            >>= relativizeUrls

    create ["log/index.html"] $ do
        route idRoute
        compile $ do
            makeItem ""
                >>= loadAndApplyTemplate "templates/archive.html" postForArchiveCtx
                >>= loadAndApplyTemplate "templates/post.html" archiveCtx
                >>= relativizeUrls

    match "index.html" $ do
        route idRoute
        compile $ do
          getResourceBody
            >>= applyAsTemplate indexCtx
            >>= loadAndApplyTemplate "templates/default.html" indexCtx
            >>= relativizeUrls

    match "templates/*" $ compile templateBodyCompiler


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posts :: Compiler [Item String]
posts = recentFirst =<< loadAll "log/*.org"

indexCtx :: Context String
indexCtx =
  listField "posts" postCtx posts <>
  constField "title" "Home"       <>
  defaultContext

archiveCtx :: Context String
archiveCtx =
    constField "title" "archive of log posts" <>
    defaultContext

postCtx :: Context String
postCtx =
    dateField "date" "%B %e, %Y" <> defaultContext

postForArchiveCtx :: Context String
postForArchiveCtx =
    listField "posts" dateForArchiveCtx posts <>
    defaultContext

dateForArchiveCtx :: Context String
dateForArchiveCtx =
    dateField "date" "%d %b %Y" <> defaultContext