build-a-blog

main.py

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+import re
+import glob
+import html
+import email
+import logging
+import datetime
+from string import Template
+
+import markdown
+from markdown.extensions.toc import TocExtension
+
+destpath_re = re.compile(r'\.md$')
+logging.basicConfig(encoding='utf-8', level=logging.INFO)
+
+def render_post(fpath):
+	destpath = destpath_re.sub('.html', fpath)
+	logging.info("opening %s for parsing, dest %s", fpath, destpath)
+	# from: https://python-markdown.github.io/reference/
+	with open(fpath, "r", encoding="utf-8") as input_file:
+		logging.info("reading %s", fpath)
+		text = input_file.read()
+
+	md = markdown.Markdown(extensions = ['extra', 'meta', TocExtension(anchorlink=True)])
+
+	logging.info("parsing %s", fpath)
+	out = md.convert(text)
+
+	title = md.Meta.get('title')[0]
+	date = md.Meta.get('date')[0]
+
+	out = markdown.markdown('# ' + title) + out
+
+	logging.info("writing to %s", destpath)
+	render_template('index.html.tmpl', destpath, {'content': out, 'more_title': ' - ' + title})
+
+	return {
+		'title': title,
+		'date': date,
+		'fpath': fpath,
+		'destpath': destpath,
+	}
+
+def render_posts():
+	files = glob.glob('posts/*.md')
+	logging.info('found post files %s', files)
+	posts = []
+	for fname in files:
+		p = render_post(fname)
+		posts.append(p)
+		logging.info('rendered post: %s', p)
+
+	return posts
+
+def posts_list_html(posts):
+	post_tpl = """<li>
+		<a href="{href}">{title}</a>
+		<time datetime="{date}">{disp_date}</time>
+	</li>"""
+	out = '<ul class="blog-posts-list">'
+	for post in posts:
+		disp_date = datetime.datetime.fromisoformat(post.get('date')).strftime('%Y-%m-%d')
+		out += post_tpl.format(href=post.get('destpath'),
+						 title=post.get('title'),
+						 date=post.get('date'),
+						 disp_date=disp_date)
+	return out + '</ul>'
+
+def render_template(tpl_fname, out_fname, subs):
+	with open(tpl_fname, 'r', encoding='utf-8') as inf:
+		tmpl = Template(inf.read())
+
+	out = tmpl.substitute(subs)
+
+	with open(out_fname, 'w', encoding='utf-8') as outf:
+		outf.write(out)
+
+def render_index(posts):
+	content_html = posts_list_html(posts)
+	render_template('index.html.tmpl', 'index.html', {'content': content_html, 'more_title': ''})
+
+def rss_post_xml(post):
+	tpl = """
+	<item>
+		<title>{title}</title>
+		<link>{link}</link>
+		<pubDate>{pubdate}</pubDate>
+		<guid>{link}</guid>
+		<description>{description}</description>
+	</item>
+	"""
+	link = "https://cfebs.com/" + post['destpath']
+
+	with open(post['fpath'], 'r', encoding='utf-8') as inf:
+		text = inf.read()
+
+
+	md = markdown.Markdown(extensions=['extra', 'meta', 'toc'])
+	converted = md.convert(text)
+
+	pubdate = email.utils.format_datetime(datetime.datetime.fromisoformat(post['date']))
+	subs = {
+		'title': post['title'],
+		'link': link,
+		'pubdate': pubdate,
+		'description': converted
+	 }
+
+	for k,v in subs.items():
+		subs[k] = html.escape(v)
+
+	return tpl.format(**subs)
+
+def render_rss_index(posts):
+	items = ''
+	for post in posts[:5]:
+		items += rss_post_xml(post)
+
+	subs = {
+		'site_title': 'cfebs.com',
+		'site_link': 'https://cfebs.com',
+		'self_full_link': 'https://cfebs.com/index.xml',
+		'description': 'Recent content from cfebs.com',
+		'last_build_date': email.utils.format_datetime(datetime.datetime.now()),
+	}
+	for k,v in subs.items():
+		subs[k] = html.escape(v)
+
+	subs['items'] = items
+	render_template('index.xml.tmpl', 'index.xml', subs)
+
+def main():
+	posts = render_posts()
+	logging.info('rendered posts: %s', posts)
+	sorted_posts = sorted(posts,
+					   key=lambda p: datetime.datetime.fromisoformat(p['date']), reverse=True)
+	render_index(sorted_posts)
+	render_rss_index(sorted_posts)
+
+if __name__ == '__main__':
+	main()