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{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE GeneralizedNewtypeDeriving #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE QuasiQuotes #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeFamilies #-}
module Blog where
import BlogStore
import Data.Text (Text, empty, pack)
import Data.Text.Lazy (fromStrict)
import Data.Time
import Locales
import Text.Blaze.Html (preEscapedToHtml)
import Text.Hamlet
import Text.Markdown
import qualified Data.Text as T
replace :: Eq a => a -> a -> [a] -> [a]
replace x y = map (\z -> if z == x then y else z)
-- |After this date all entries are Markdown
markdownCutoff :: Day
markdownCutoff = fromGregorian 2013 04 28
-- blog HTML
blogTemplate :: BlogLang -> Text -> Html -> Html
blogTemplate lang t_append body = [shamlet|
$doctype 5
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content=#{blogTitle lang t_append}>
<link rel="stylesheet" type="text/css" href="/static/blog.css" media="all">
<link rel="alternate" type="application/rss+xml" title="RSS-Feed" href=#{rssUrl}>
<title>#{blogTitle lang t_append}
<body>
<header>
<h1>
<a href="/" .unstyled-link>#{blogTitle lang empty}
<hr>
^{body}
^{showFooter}
|]
where
rssUrl = T.concat ["/", show' lang, "/rss.xml"]
showFooter :: Html
showFooter = [shamlet|
<footer>
<p .footer>Served without any dynamic languages.
<p .footer>
<a href=#{repoURL} .uncoloured-link>Version #{version}
|
<a href=#{twitter} .uncoloured-link>Twitter
|
<a href=#{mailTo} .uncoloured-link>Mail
<p .lod>
ಠ_ಠ
|]
isEntryMarkdown :: Entry -> Bool
isEntryMarkdown e = edate e > markdownCutoff
renderEntryMarkdown :: Text -> Html
renderEntryMarkdown = markdown def {msXssProtect = False} . fromStrict
renderEntries :: [Entry] -> Maybe Html -> Html
renderEntries entries pageLinks = [shamlet|
$forall entry <- entries
<article>
<h2 .inline>
<a href=#{linkElems entry} .unstyled-link>
#{title entry}
<aside .date>
#{pack $ formatTime defaultTimeLocale "%Y-%m-%d" $ edate entry}
$if (isEntryMarkdown entry)
^{renderEntryMarkdown $ btext entry}
$else
^{preEscapedToHtml $ btext entry}
$if ((/=) (mtext entry) empty)
<p>
<a .uncoloured-link href=#{linkElems entry}>
#{readMore $ lang entry}
<hr>
$maybe links <- pageLinks
^{links}
|]
where
linkElems Entry{..} = concat $ ["/", show lang, "/", show entryId]
showLinks :: Maybe Int -> BlogLang -> Html
showLinks (Just i) lang = [shamlet|
$if ((>) i 1)
<div .navigation>
<a href=#{nLink $ succ i} .uncoloured-link>#{backText lang}
|
<a href=#{nLink $ pred i} .uncoloured-link>#{nextText lang}
$elseif ((<=) i 1)
^{showLinks Nothing lang}
|]
where
nLink page = T.concat ["/", show' lang, "/?page=", show' page]
showLinks Nothing lang = [shamlet|
<div .navigation>
<a href=#{nLink} .uncoloured-link>#{backText lang}
|]
where
nLink = T.concat ["/", show' lang, "/?page=2"]
renderEntry :: Entry -> Html
renderEntry e@Entry{..} = [shamlet|
<article>
<h2 .inline>
#{title}
<aside .date>
#{pack $ formatTime defaultTimeLocale "%Y-%m-%d" edate}
$if (isEntryMarkdown e)
^{renderEntryMarkdown btext}
<p>^{renderEntryMarkdown $ mtext}
$else
^{preEscapedToHtml $ btext}
<p>^{preEscapedToHtml $ mtext}
<hr>
|]
showError :: BlogError -> BlogLang -> Html
showError NotFound l = blogTemplate l (T.append ": " $ notFoundTitle l) $ [shamlet|
<p>:(
<p>#{notFoundText l}
<hr>
|]
showError UnknownError l = blogTemplate l "" $ [shamlet|
<p>:(
<p>#{unknownErrorText l}
<hr>
|]
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