2 files changed, 37 insertions, 0 deletions
diff --git a/plugins/related_posts/__init__.py b/plugins/related_posts/__init__.py
new file mode 100644
index 0000000..c78861e
--- /dev/null
+++ b/plugins/related_posts/__init__.py
@@ -0,0 +1 @@
+from .related_posts import *
diff --git a/plugins/related_posts/related_posts.py b/plugins/related_posts/related_posts.py
new file mode 100644
index 0000000..4000e03
--- /dev/null
+++ b/plugins/related_posts/related_posts.py
@@ -0,0 +1,36 @@
+"""
+Related posts plugin for Pelican
+================================
+
+Adds related_posts variable to article's context
+"""
+
+from pelican import signals
+from collections import Counter
+
+
+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)
+
+    for article in generator.articles:
+        # no tag, no relation
+        if not hasattr(article, 'tags'):
+            continue
+
+        # score = number of common tags
+        scores = Counter()
+        for tag in article.tags:
+            scores += Counter(generator.tags[tag])
+
+        # remove itself
+        scores.pop(article)
+
+        article.related_posts = [other for other, count 
+            in scores.most_common(numentries)]
+
+
+def register():
+    signals.article_generator_finalized.connect(add_related_posts)
+