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# This file defines various fragments of the blog, such as the header
# and footer, as functions that receive arguments to be templated into
# them.
#
# An entire post is rendered by `renderPost`, which assembles the
# fragments together in a runCommand execution.
#
# The post overview is rendered by 'postList'.
{ pkgs, lib, ... }:
let
inherit (builtins) filter map hasAttr replaceStrings toFile;
inherit (pkgs.third_party) runCommandNoCC writeText;
escape = replaceStrings [ "<" ">" "&" "'" ] [ "<" ">" "&" "'" ];
header = title: ''
<!DOCTYPE html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<meta name="description" content="tazjin's blog">
<link rel="stylesheet" type="text/css" href="static/blog.css" media="all">
<link rel="alternate" type="application/rss+xml" title="RSS-Feed" href="/rss.xml">
<title>tazjin's blog${lib.optionalString (title != "") (
": " + (escape title)
)}</title>
</head>
<body>
<header>
<h1><a class="unstyled-link" href="/">tazjin's blog</a> </h1>
<hr>
</header>
'';
footer = ''
<hr>
<footer>
<p class="footer">
<a class="uncoloured-link" href="https://tazj.in">homepage</a>
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<a class="uncoloured-link" href="https://git.tazj.in/about">code</a>
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<a class="uncoloured-link" href="https://twitter.com/tazjin">twitter</a>
</p>
<p class="lod">ಠ_ಠ</p>
</footer>
</body>
'';
renderPost = post: runCommandNoCC "${post.key}.html" {} ''
cat ${toFile "header.html" (header post.title)} > $out
# Write the post title & date
echo '<article><h2 class="inline">${escape post.title}</h2>' >> $out
echo '<aside class="date">' >> $out
date --date="@${toString post.date}" '+%Y-%m-%d' >> $out
echo '</aside>' >> $out
# Write the actual post through cheddar's about-filter mechanism
cat ${post.content} | ${pkgs.tools.cheddar}/bin/cheddar --about-filter ${post.content} >> $out
echo '</article>' >> $out
cat ${toFile "footer.html" footer} >> $out
'';
# Generate a post list for all listed, non-draft posts.
isDraft = post: (hasAttr "draft" post) && post.draft;
isUnlisted = post: (hasAttr "listed" post) && !post.listed;
includePost = post: !(isDraft post) && !(isUnlisted post);
indexEntry= post: "<li>a blog post</li>";
blogIndex = posts: writeText "blog-index.html" (lib.concatStrings (
[
(header "")
"<ul>"
]
++ (map indexEntry (filter includePost posts))
++ [
"</ul>"
footer
]));
in {
inherit blogIndex renderPost;
}
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