77 lines
2.0 KiB
Haskell
77 lines
2.0 KiB
Haskell
{-# LANGUAGE QuasiQuotes #-}
|
|
---------------------------------------------------------
|
|
--
|
|
-- Module : Yesod.Helpers.AtomFeed
|
|
-- Copyright : Michael Snoyman
|
|
-- License : BSD3
|
|
--
|
|
-- Maintainer : Michael Snoyman <michael@snoyman.com>
|
|
-- Stability : Stable
|
|
-- Portability : portable
|
|
--
|
|
-- Generating atom news feeds.
|
|
--
|
|
---------------------------------------------------------
|
|
|
|
-- | Generation of Atom newsfeeds. See
|
|
-- <http://en.wikipedia.org/wiki/Atom_(standard)>.
|
|
module Yesod.Helpers.AtomFeed
|
|
( AtomFeed (..)
|
|
, AtomFeedEntry (..)
|
|
, atomFeed
|
|
, RepAtom (..)
|
|
) where
|
|
|
|
import Yesod
|
|
import Data.Time.Clock (UTCTime)
|
|
import Text.Hamlet.Monad
|
|
import Text.Hamlet.Quasi
|
|
|
|
newtype RepAtom = RepAtom Content
|
|
instance HasReps RepAtom where
|
|
chooseRep (RepAtom c) _ = return (TypeAtom, c)
|
|
|
|
atomFeed :: AtomFeed (Routes master) -> GHandler sub master RepAtom
|
|
atomFeed = fmap RepAtom . hamletToContent . template
|
|
|
|
data AtomFeed url = AtomFeed
|
|
{ atomTitle :: String
|
|
, atomLinkSelf :: url
|
|
, atomLinkHome :: url
|
|
, atomUpdated :: UTCTime
|
|
, atomEntries :: [AtomFeedEntry url]
|
|
}
|
|
|
|
data AtomFeedEntry url = AtomFeedEntry
|
|
{ atomEntryLink :: url
|
|
, atomEntryUpdated :: UTCTime
|
|
, atomEntryTitle :: String
|
|
, atomEntryContent :: HtmlContent
|
|
}
|
|
|
|
xmlns :: AtomFeed url -> HtmlContent
|
|
xmlns _ = cs "http://www.w3.org/2005/Atom"
|
|
|
|
template :: AtomFeed url -> Hamlet url IO ()
|
|
template arg = [$xhamlet|
|
|
<?xml version="1.0" encoding="utf-8"?>
|
|
%feed!xmlns=$xmlns.arg$
|
|
%title $cs.atomTitle.arg$
|
|
%link!rel=self!href=@atomLinkSelf.arg@
|
|
%link!href=@atomLinkHome.arg@
|
|
%updated $cs.formatW3.atomUpdated.arg$
|
|
%id @atomLinkHome.arg@
|
|
$forall atomEntries.arg entry
|
|
^entryTemplate.entry^
|
|
|]
|
|
|
|
entryTemplate :: AtomFeedEntry url -> Hamlet url IO ()
|
|
entryTemplate arg = [$xhamlet|
|
|
%entry
|
|
%id @atomEntryLink.arg@
|
|
%link!href=@atomEntryLink.arg@
|
|
%updated $cs.formatW3.atomEntryUpdated.arg$
|
|
%title $cs.atomEntryTitle.arg$
|
|
%content!type=html $cdata.atomEntryContent.arg$
|
|
|]
|