about summary refs log tree commit diff
path: root/services/tazblog/src/Blog.hs
blob: b5d83a57699a7a2cd509a6896c739a28dd9cf606 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
{-# 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>
|]