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"""
Related posts plugin for Pelican
================================
Adds related_posts variable to article's context
"""
from pelican import signals
from collections import Counter
from itertools import chain
def add_related_posts(generator):
# get the max number of entries from settings
# or fall back to default (5)
numentries = generator.settings.get('RELATED_POSTS_MAX', 5)
# Skip all posts in the same category as the article
skipcategory = generator.settings.get('RELATED_POSTS_SKIP_SAME_CATEGORY', False)
for article in generator.articles:
# set priority in case of forced related posts
if hasattr(article,'related_posts'):
# split slugs
related_posts = article.related_posts.split(',')
posts = []
# get related articles
for slug in related_posts:
i = 0
slug = slug.strip()
for a in generator.articles:
if i >= numentries: # break in case there are max related psots
break
if a.slug == slug:
posts.append(a)
i += 1
article.related_posts = posts
else:
# no tag, no relation
if not hasattr(article, 'tags'):
continue
# score = number of common tags
related = chain(*(generator.tags[tag] for tag in article.tags))
if skipcategory:
related = (other for other in related
if other.category != article.category)
scores = Counter(related)
# remove itself
scores.pop(article, None)
article.related_posts = [other for other, count
in scores.most_common(numentries)]
def register():
signals.article_generator_finalized.connect(add_related_posts)
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