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{-# LANGUAGE OverloadedStrings #-}
module Main where
import Prelude hiding (id)
import Control.Arrow
import Control.Category (id)
import Control.Monad
import Data.Function (on)
import Data.List hiding (group)
import Data.Maybe
import Data.Monoid (mempty, mconcat)
import System.FilePath (takeFileName)
import System.Locale (defaultTimeLocale, TimeLocale)
import Data.Time.Calendar
import Data.Time.Clock (UTCTime (..))
import Data.Time.Format (parseTime, formatTime)
import Text.Printf
import Hakyll hiding (chronological, recentFirst)
main :: IO ()
main = hakyll $ do
-- Compress CSS
match "css/*" $ do
route idRoute
compile compressCssCompiler
-- Images
match "images/**" $ do
route idRoute
compile copyFileCompiler
-- Render posts
group "posts" $ do
match (inPostGroup "posts/*") $ do
route $ setExtension ".html"
compile $ pageCompiler
>>> addDate
>>> addTagCloud
>>> addArchiveLinks
>>> renderTagsField "prettytags" (fromCapture "tags/*")
>>> applyTemplateCompiler "templates/post.html"
>>> addTopnav
>>> applyTemplateCompiler "templates/default.html"
>>> relativizeUrlsCompiler
-- Index
match "index*" $ route $ setExtension ".html"
metaCompile $ requireAllA allPosts $ arr (recentFirst . snd)
>>> (constA ("Home", "index*") &&& id)
>>> paginatePosts
match "posts/*" $ compile $ pageCompiler
>>> (id &&& arr (getField "path"))
>>> setFieldA "url" (arr (Identifier postGroup) >>> getRouteFor >>> arr (fromMaybe "" . fmap toUrl))
-- Tags
create "tags" $
requireAll_ allPosts >>> arr readTags
match "tags/*" $ route $ setExtension ".html"
metaCompile $ require_ "tags"
>>> arr tagsMap
>>> arr (map $ second recentFirst)
>>> mapCompiler (((arr (\tag -> "Posts tagged ‘" ++ tag ++ "’") &&& arr (parseGlob . (++ "*") . identifierPath . tagIdentifier)) *** id)
>>> paginatePosts
)
>>> arr concat
-- Archive
create "archive" $
requireAll_ allPosts >>> arr (Tags . groupTuples . reverse . sortBy (compare `on` fst) . catMaybes . map (\page -> getDate page >>= (\date -> return (date, page))))
match "archive/**" $ route $ setExtension ".html"
metaCompile $ require_ "archive"
>>> arr tagsMap
>>> arr (map $ second recentFirst)
>>> mapCompiler (((arr (\month -> "Archive for " ++ prettyMonth month) &&& arr (parseGlob . (++ "*") . identifierPath . archiveIdentifier)) *** id)
>>> paginatePosts
)
>>> arr concat
-- Render RSS feed
match "rss.xml" $ route idRoute
create "rss.xml" $ requireAll_ allPosts
>>> mapCompiler (arr $ copyBodyToField "description")
>>> renderRss feedConfiguration
-- Read templates
match "templates/*" $ compile templateCompiler
where
postGroup = Just "posts"
inPostGroup :: Pattern a -> Pattern a
inPostGroup p = patternIntersection [inGroup postGroup, p]
notInPostGroup :: Pattern a -> Pattern a
notInPostGroup p = patternIntersection [complement $ inGroup postGroup, p]
allPosts :: Pattern (Page String)
allPosts = notInPostGroup "posts/*"
addTopnav :: Compiler (Page a) (Page a)
addTopnav = arr (id &&& const ()) >>> setFieldA "topnav" topnav
topnav :: Compiler () String
topnav = constA topLinks >>> mapCompiler topnavLink >>> arr (concat . catMaybes)
where
topnavLink = second (id &&& (getRouteFor >>> arr (fmap toUrl)) >>> arr pullSnd)
>>> arr pullSnd
>>> (getIdentifier &&& id)
>>> arr pullSnd
>>> arr (fmap (\(cur, (text, (link, url))) -> "<li><a href=\"" ++ url ++ "\"" ++ cl cur link ++ "><span>" ++ escapeHtml text ++ "</span></a></li>"))
cl cur link = if cur == link then " class=\"s\"" else ""
maybeGetRouteFor :: Compiler (Maybe (Identifier (Page String))) (Maybe FilePath)
maybeGetRouteFor = arr maybeToEither >>> (constA Nothing ||| getRouteFor)
where
maybeToEither Nothing = Left ()
maybeToEither (Just a) = Right a
addPagenav :: Compiler (Page a, (Maybe (Identifier (Page String)), Maybe (Identifier (Page String)))) (Page a)
addPagenav = setFieldA "pagenav" $ (maybeGetRouteFor *** maybeGetRouteFor) >>> arr pagenav
pagenav (prev, next) = pagenavPrev prev ++ pagenavNext next
pagenavPrev Nothing = "<span class=\"newer\"> </span>"
pagenavPrev (Just url) = "<span class=\"newer\"><a href=\"" ++ url ++ "\" rel=\"prev\">« Newer Entries</a></span>"
pagenavNext Nothing = "<span class=\"older\"> </span>"
pagenavNext (Just url) = "<span class=\"older\"><a href=\"" ++ url ++ "\" rel=\"next\">Older Entries »</a></span>"
pageTitle 0 = ""
pageTitle i = " – Page " ++ show (i+1)
paginatePosts :: Compiler ((String, Pattern (Page String)), [Page String]) [(Identifier (Page String), Compiler () (Page String))]
paginatePosts = paginate 5
(arr (\(title, prev, next, i, pages) -> (((mempty, (prev, next)), (title, i)), pages))
>>> first (first (first (addTagCloud >>> addArchiveLinks)
>>> addPagenav)
>>> arr (\(page, (title, i)) -> setField "title" (title ++ pageTitle i) page)
)
>>> addPosts
>>> applyTemplateCompiler "templates/index.html"
>>> addTopnav
>>> applyTemplateCompiler "templates/default.html"
>>> relativizeUrlsCompiler
)
topLinks :: [(String, Identifier (Page String))]
topLinks = [("Home", "index")
]
pullSnd :: Functor m => (a, m b) -> m (a, b)
pullSnd (a, b) = fmap (const a &&& id) b
patternIntersection :: [Pattern a] -> Pattern a
patternIntersection patterns = predicate $ flip all patterns . flip matches
getUTCMaybe :: Page a -- ^ Input page
-> Maybe UTCTime -- ^ Parsed UTCTime
getUTCMaybe page = msum
[ fromPublished "%a, %d %b %Y %H:%M:%S UT"
, fromPublished "%Y-%m-%dT%H:%M:%SZ"
, fromPublished "%B %e, %Y %l:%M %p"
, fromPublished "%B %e, %Y"
, getFieldMaybe "path" page >>= parseTime' "%Y-%m-%d" .
intercalate "-" . take 3 . splitAll "-" . takeFileName
]
where
fromPublished f = getFieldMaybe "published" page >>= parseTime' f
parseTime' f str = parseTime defaultTimeLocale f str
getDate :: Page a -> Maybe String
getDate = liftM ((\(y, m, _) -> printf "%04d/%02d" y m) . toGregorian . utctDay) . getUTCMaybe
chronological :: [Page a] -> [Page a]
chronological = sortBy (compare `on` getUTCMaybe)
recentFirst :: [Page a] -> [Page a]
recentFirst = reverse . chronological
groupTuples :: Eq a => [(a, b)] -> [(a, [b])]
groupTuples = map (fst . head &&& map snd) . groupBy ((==) `on` fst)
paginate :: Int -> Compiler (a, Maybe (Identifier (Page String)), Maybe (Identifier (Page String)), Int, [Page String]) (Page String) -> Compiler ((a, Pattern (Page String)), [Page String]) [(Identifier (Page String), Compiler () (Page String))]
paginate perPage c = arr $ \((a, pattern), posts) -> renderPages a pattern 0 (n posts) posts
where
renderPages _ _ _ _ [] = []
renderPages a pattern i n posts = (name i, constA (a, prev i, next i n, i, cur) >>> c):(renderPages a pattern (i+1) n rest)
where
(cur, rest) = splitAt perPage posts
prev 0 = Nothing
prev i = Just . name $ i-1
next i n = if i == (n-1) then Nothing else Just . name $ i+1
name 0 = fromCapture pattern ""
name i = fromCapture pattern $ show i
n posts = (length posts + perPage - 1) `div` perPage
addPosts :: Compiler (Page String, [Page String]) (Page String)
addPosts = setFieldA "posts" $
mapCompiler (addDate
>>> addTagCloud
>>> renderTagsField "prettytags" (fromCapture "tags/*")
>>> applyTemplateCompiler "templates/post.html")
>>> arr mconcat
>>> arr pageBody
addDate = arr $ renderDateField "date" "<span class=\"data\"><span class=\"j\">%e</span>%b/%y</span>" ""
addTagCloud = requireA "tags" (setFieldA "tagcloud" renderTagCloud')
where
renderTagCloud' :: Compiler (Tags String) String
renderTagCloud' = renderTagCloud tagIdentifier 100 300
addArchiveLinks = requireA "archive" (setFieldA "archive" renderArchive)
where
renderArchive :: Compiler (Tags String) String
renderArchive = arr tagsMap
>>> arr (map (\(s, p) -> "<li><a href=\"/archive/" ++ s ++ ".html\">" ++ prettyMonth s ++ "</a> (" ++ show (length p) ++ ")</li>"))
>>> arr mconcat
prettyMonth :: String -> String
prettyMonth s = month ++ " " ++ year
where
year = take 4 s
month = case (drop 5 s) of
"01" -> "January"
"02" -> "February"
"03" -> "March"
"04" -> "April"
"05" -> "May"
"06" -> "June"
"07" -> "July"
"08" -> "August"
"09" -> "September"
"10" -> "October"
"11" -> "November"
"12" -> "December"
_ -> "Unknown"
tagIdentifier :: String -> Identifier (Page String)
tagIdentifier = fromCapture "tags/*"
archiveIdentifier :: String -> Identifier (Page String)
archiveIdentifier = fromCapture "archive/*"
feedConfiguration :: FeedConfiguration
feedConfiguration = FeedConfiguration
{ feedTitle = "Universe Factory"
, feedDescription = "Because one universe is not enough"
, feedAuthorName = "NeoRaider"
, feedRoot = "http://blog.universe-factory.net"
}
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