Create blog RSS feed functionality

Fix feed link in main template

blog/templates/blog/feed.xml

@@ -0,0 +1,35 @@
+<?xml version="1.0" encoding="utf-8"?>
+{% load static from staticfiles %}
+{% load get_post_link from blog_link %}
+<rss version="2.0">
+    <channel>
+        <title>Gergely Polonkai</title>
+        <description>Gergely Polonkai’s Blog</description>
+        <link>{{ site_url }}</link>
+{% comment %}
+The <pubDate> element defines the last publication date for the content in the RSS feed.
+The <lastBuildDate> element defines the last-modified date of the content of the feed.
+
+TODO: Incorporate a modified_at field in the blog. These fields must depend on them.
+{% endcomment %}
+        <lastBuildDate>{{ last_build_date }}</lastBuildDate>
+        <pubDate>{{ last_build_date }}</pubDate>
+        <ttl>7200</ttl>
+        <language>en</language>
+        <image>
+            <title>Gergely Polonkai</title>
+            <url>{{ profile_pic }}</url>
+            <link>{{ site_url }}</link>
+        </image>
+{% for post in posts %}
+        <item>
+            <title><![CDATA[ {{ post.title }} ]]></title>
+            <link>{% get_post_link post %}</link>
+            <comments>{% get_post_link post %}#comments</comments>
+            <pubDate>{{ post.created_at_rss }}</pubDate>
+            <description><![CDATA[ {{ post.content|safe }} ]]></description>
+            <guid>{% get_post_link post %}</guid>
+        </item>
+{% endfor %}
+    </channel>
+</rss>

blog/views.py

@@ -1,6 +1,10 @@
 from django.shortcuts import render, get_object_or_404
 from django.core.paginator import Paginator, EmptyPage, PageNotAnInteger
 from blog.models import Post, CodeChunk
+from django.core.urlresolvers import reverse
+import datetime
+import pytz
+from django.templatetags.static import static
 
 def mainpage(request):
     last_posts = Post.objects.filter(draft = False).order_by('-created_at')[:5]
@@ -96,5 +100,21 @@ def codechunk(request, language, slug):
     return render(request, 'blog/code-chunk.html', {'codechunk': chunk})
 
 def feed(request):
-    return render(request, 'blog/feed.xml', {})
+    latest_post = Post.objects.filter(draft = False).order_by('-created_at')[0:1]
+
+    if not latest_post:
+        latest_date = datetime.datetime(1983, 3, 7, 11, 54, 45, 0, pytz.timezone('Europe/Budapest'))
+    else:
+        latest_date = latest_post[0].created_at
+
+    posts = Post.objects.order_by('-created_at')[:10]
+
+    return render(request, 'blog/feed.xml', {
+                    'site_url': request.build_absolute_uri(reverse('home')),
+                    'profile_pic': request.build_absolute_uri(static('images/profile.png')),
+                    'last_build_date': latest_date.strftime('%a, %d %b %Y %T %z'),
+                    'posts': posts,
+                },
+            content_type = 'application/xml'
+        )