Add featured route

lib/nulla_web/controllers/activitypub/featured_controller.ex

@@ -0,0 +1,24 @@
+defmodule NullaWeb.ActivityPub.FeaturedController do
+  use NullaWeb, :controller
+  alias Nulla.Actors
+  alias Nulla.Notes
+  alias Nulla.Actors.Actor
+  alias NullaWeb.ActivityPub.FeaturedJSON
+
+  def index(conn, %{"username" => username}) do
+    domain = NullaWeb.Endpoint.host()
+    actor = Actors.get_actor_by(acct: "#{username}@#{domain}")
+
+    case actor do
+      %Actor{} = actor ->
+        notes = Notes.list_notes_by(actor_id: actor.id, featured: true)
+
+        conn
+        |> put_resp_content_type("application/activity+json")
+        |> send_resp(200, Jason.encode!(FeaturedJSON.index(actor, notes)))
+
+      _ ->
+        send_resp(conn, 404, "")
+    end
+  end
+end