Add blog sibling nav links to blog entries

rophako/modules/blog.py

@@ -65,6 +65,21 @@ def entry(fid):
     # Count the comments for this post
     post["comment_count"] = Comment.count_comments("blog-{}".format(post_id))
 
+    # Inject information about this post's siblings.
+    index = Blog.get_index()
+    siblings = [None, None] # previous, next
+    sorted_ids = map(lambda y: int(y), sorted(index.keys(), key=lambda x: index[x]["time"], reverse=True))
+    for i in range(0, len(sorted_ids)):
+        if sorted_ids[i] == post_id:
+            # Found us!
+            if i > 0:
+                # We have an older post.
+                siblings[0] = index[ str(sorted_ids[i-1]) ]
+            if i < len(sorted_ids) - 1:
+                # We have a newer post.
+                siblings[1] = index[ str(sorted_ids[i+1]) ]
+    post["siblings"] = siblings
+
     g.info["post"] = post
     return template("blog/entry.html")
 

rophako/www/blog/entry.inc.html

@@ -6,6 +6,9 @@
         <a href="{{ url_for('blog.entry', fid=post['fid']) }}" class="blog-title-index">
             {{ post["subject"] }}
         </a><p>
+    {% else %}
+        {% include "blog/sibling-links.html" %}
+        <p>
     {% endif %}
 
     <div class="blog-author">
@@ -67,6 +70,9 @@
     <p>
 
     {% if from != "index" %}
+        {% include "blog/sibling-links.html" %}
+        <p>
+
         {{ include_page("comment.partial_index",
             thread="blog-"+post["post_id"]|string,
             subject=post["subject"],

rophako/www/blog/sibling-links.html

@@ -0,0 +1,18 @@
+{# Older/Newer links #}
+
+{% if post["siblings"][0] or post["siblings"][1] %}
+    <div class="right">
+    [
+    {% if post["siblings"][0] %}
+        <a href="{{ url_for('blog.entry', fid=post["siblings"][0]['fid']) }}">&lt; {{ post["siblings"][0]['subject'] }}</a>
+
+        {% if post["siblings"][1] %} | {% endif %}
+    {% endif %}
+
+    {% if post["siblings"][1] %}
+        <a href="{{ url_for('blog.entry', fid=post["siblings"][1]['fid']) }}">{{ post["siblings"][1]['subject'] }} &gt;</a>
+    {% endif %}
+
+    ]
+    </div>
+{% endif %}