feat: Add IAB blog feed

ietf/blog/feeds.py

@@ -36,3 +36,12 @@ def item_author_name(self, item):
 
     def item_pubdate(self, item):
         return item.date
+
+class IABBlogFeed(BlogFeed):
+    def items(self):
+        return (
+            BlogPage.objects.live()
+            .filter(topics__topic__slug="iab")
+            .annotate(d=Coalesce("date_published", "first_published_at"))
+            .order_by("-d")
+        )

ietf/blog/tests.py

@@ -5,7 +5,8 @@
 from wagtail.models import Page, Site
 
 from ..home.models import HomePage
-from .models import BlogIndexPage, BlogPage
+from ..snippets.models import Topic
+from .models import BlogIndexPage, BlogPage, BlogPageTopic
 
 
 class BlogTests(TestCase):
@@ -100,3 +101,22 @@ def test_previous_next_links_correct(self):
         blog = BlogPage.objects.get(pk=self.blog.pk)
         self.assertEquals(self.prevblog, blog.previous)
         self.assertEquals(self.nextblog, blog.next)
+
+    def test_blog_feed(self):
+        r = self.client.get(path='/blog/feed/')
+        self.assertEqual(r.status_code, 200)
+        self.assertIn(self.blog.url.encode(), r.content)
+        self.assertIn(self.otherblog.url.encode(), r.content)
+
+    def test_iab_feed(self):
+        topic=Topic(title="iab", slug="iab")
+        topic.save()
+        iab_topic = BlogPageTopic(topic=topic, page=self.otherblog)
+        iab_topic.save()
+        self.otherblog.topics = [iab_topic, ]
+        self.otherblog.save()
+
+        r = self.client.get(path='/blog/iab/feed/')
+        self.assertEqual(r.status_code, 200)
+        self.assertNotIn(self.blog.url.encode(), r.content)
+        self.assertIn(self.otherblog.url.encode(), r.content)

ietf/urls.py

@@ -8,7 +8,7 @@
 from wagtail.documents import urls as wagtaildocs_urls
 
 from ietf.bibliography import urls as bibliography_urls
-from ietf.blog.feeds import BlogFeed
+from ietf.blog.feeds import BlogFeed, IABBlogFeed
 from ietf.search.views import search
 from ietf.snippets import urls as snippet_urls
 
@@ -21,6 +21,7 @@
     url(r"^bibliography/", include(bibliography_urls)),
     url(r"^django-admin/", admin.site.urls),
     url(r"^blog/feed/$", BlogFeed(), name="blog_feed"),
+    url(r"^blog/iab/feed/$", IABBlogFeed(), name="iab_blog_feed"),
     url(r"^admin/", include(wagtailadmin_urls)),
     url(r"^documents/", include(wagtaildocs_urls)),
     url(r"^search/$", search, name="search"),