Add admin interface to manage instances subscriptions

Signed-off-by: Thomas Citharel <tcit@tcit.fr>

lib/mobilizon_web/plugs/federating.ex

@@ -0,0 +1,27 @@
+# Portions of this file are derived from Pleroma:
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2019 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule MobilizonWeb.Plugs.Federating do
+  @moduledoc """
+  Restrict ActivityPub routes when not federating
+  """
+  import Plug.Conn
+
+  def init(options) do
+    options
+  end
+
+  def call(conn, _opts) do
+    if Mobilizon.Config.get([:instance, :federating]) do
+      conn
+    else
+      conn
+      |> put_status(404)
+      |> Phoenix.Controller.put_view(MobilizonWeb.ErrorView)
+      |> Phoenix.Controller.render("404.json")
+      |> halt()
+    end
+  end
+end