Add recent news header to boards and posts

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

board/views.py

@@ -83,6 +83,13 @@ class BoardMixin:
         return get_object_or_404(Board, url=self.kwargs["url"])  # type: ignore
 
 
+class NewsSnippetMixin:
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        context["news"] = NewsPost.objects.order_by("-id")[:3]
+        return context
+
+
 class CreateView(BoardMixin, edit.CreateView):
     """
     Helper class that sets a few variables for posts and check against bans.
@@ -107,7 +114,7 @@ class CreateView(BoardMixin, edit.CreateView):
             return super(CreateView, self).dispatch(request, *args, **kwargs)
 
 
-class BoardView(BoardMixin, TemplateView):
+class BoardView(NewsSnippetMixin, BoardMixin, TemplateView):
     template_name = "board/board_detail.html"
 
     def get(self, request, *args, **kwargs):
@@ -234,7 +241,7 @@ class ReplyCreateView(CreateView):
         return reverse("board:post_success") + "?" + query.urlencode()
 
 
-class PostView(TemplateView):
+class PostView(NewsSnippetMixin, TemplateView):
     template_name = "board/post_detail.html"
 
     def get_context_data(self, **kwargs):