tvl-depot/src/RSS.hs
Vincent Ambo efbec9ff76 * added RSS.hs: functions to create an RSS feed
* added RSS feed handler
* FromReqURI instance for BlogLang
* fixed RSS-feed link
2012-03-24 00:32:38 +01:00

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1.3 KiB
Haskell

{-# LANGUAGE RecordWildCards #-}
module RSS (renderFeed) where
import qualified Data.Text as T
import Data.Maybe (fromMaybe)
import Data.Time (getCurrentTime, UTCTime)
import Network.URI
import Text.RSS
import Locales
import BlogDB hiding (Title)
createChannel :: BlogLang -> UTCTime -> [ChannelElem]
createChannel l now = [ Language $ show l
, Copyright "Vincent Ambo"
, WebMaster "tazjin@googlemail.com"
, ChannelPubDate now
]
createRSS :: BlogLang -> UTCTime -> [Item] -> RSS
createRSS l t i = RSS (rssTitle l) (rssLink l) (rssDesc l) (createChannel l t) i
createItem :: Entry -> Item
createItem Entry{..} = [ Title $ T.unpack title
, Link $ makeLink lang entryId
, Description $ T.unpack btext
, PubDate edate]
makeLink :: BlogLang -> EntryId -> URI
makeLink l i = let url = "http://tazj.in/" ++ show l ++ "/" ++ show i
in fromMaybe nullURI $ parseURI url
createItems :: [Entry] -> [Item]
createItems = map createItem
createFeed :: BlogLang -> [Entry] -> IO RSS
createFeed l e = getCurrentTime >>= (\t -> return $ createRSS l t $ createItems e )
renderFeed :: BlogLang -> [Entry] -> IO String
renderFeed l e = createFeed l e >>= (\feed -> return $ showXML $ rssToXML feed)