Move blog post cron over to django (bug 661443)

apps/devhub/cron.py

@@ -0,0 +1,31 @@
+from django.conf import settings
+
+import commonware.log
+from dateutil import parser
+import feedparser
+
+import cronjobs
+from devhub.models import BlogPost
+
+log = commonware.log.getLogger('z.cron')
+
+
+@cronjobs.register
+def update_blog_posts():
+    """Update the blog post cache."""
+
+    items = feedparser.parse(settings.DEVELOPER_BLOG_URL)['items']
+    if not items:
+        return
+
+    BlogPost.objects.all().delete()
+
+    for item in items[:5]:
+        post = {}
+        post['title'] = item.title
+        post['date_posted'] = parser.parse(item.date)
+        post['permalink'] = item.link
+        BlogPost.objects.create(**post)
+
+    log.info('Adding %d blog posts.' % BlogPost.objects.count())
+