Update

lib/nulla_web/controllers/activitypub/follow_controller.ex

@@ -0,0 +1,64 @@
+defmodule NullaWeb.ActivityPub.FollowController do
+  use NullaWeb, :controller
+  alias NullaWeb.ActivityPub.FollowJSON
+  alias Nulla.Actors
+  alias Nulla.Relations
+
+  def following(conn, %{"username" => username, "page" => page_param}) do
+    domain = NullaWeb.Endpoint.host()
+    limit = Application.get_env(:nulla, :instance)[:api_limit]
+    actor = Actors.get_actor_by(acct: "#{username}@#{domain}")
+    total = Relations.count_following(actor.id)
+
+    page =
+      case Integer.parse(page_param) do
+        {int, _} when int > 0 -> int
+        _ -> 1
+      end
+
+    following_list = Enum.map(Relations.get_following(actor.id, page, limit), & &1.ap_id)
+
+    conn
+    |> put_resp_content_type("application/activity+json")
+    |> json(FollowJSON.following(actor, total, following_list, page, limit))
+  end
+
+  def following(conn, %{"username" => username}) do
+    domain = NullaWeb.Endpoint.host()
+    actor = Actors.get_actor_by(acct: "#{username}@#{domain}")
+    total = Relations.count_following(actor.id)
+
+    conn
+    |> put_resp_content_type("application/activity+json")
+    |> json(FollowJSON.following(actor, total))
+  end
+
+  def followers(conn, %{"username" => username, "page" => page_param}) do
+    domain = NullaWeb.Endpoint.host()
+    limit = Application.get_env(:nulla, :instance)[:api_limit]
+    actor = Actors.get_actor_by(acct: "#{username}@#{domain}")
+    total = Relations.count_followers(actor.id)
+
+    page =
+      case Integer.parse(page_param) do
+        {int, _} when int > 0 -> int
+        _ -> 1
+      end
+
+    followers_list = Enum.map(Relations.get_followers(actor.id, page, limit), & &1.ap_id)
+
+    conn
+    |> put_resp_content_type("application/activity+json")
+    |> json(FollowJSON.followers(actor, total, followers_list, page, limit))
+  end
+
+  def followers(conn, %{"username" => username}) do
+    domain = NullaWeb.Endpoint.host()
+    actor = Actors.get_actor_by(acct: "#{username}@#{domain}")
+    total = Relations.count_followers(actor.id)
+
+    conn
+    |> put_resp_content_type("application/activity+json")
+    |> json(FollowJSON.followers(actor, total))
+  end
+end