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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.Maybe (fromJust)
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)
show' :: Show a => a -> Text
show' = pack . show
-- |After this time all entries are Markdown
markdownCutoff :: UTCTime
markdownCutoff = fromJust $ parseTimeM False defaultTimeLocale "%s" "1367149834"
-- 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 Integer -> 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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