Add admin interface to manage instances subscriptions

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

test/mobilizon_web/plugs/federating_plug_test.exs

@@ -0,0 +1,30 @@
+# 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.Plug.FederatingTest do
+  use MobilizonWeb.ConnCase
+
+  test "returns and halt the conn when federating is disabled" do
+    Mobilizon.Config.put([:instance, :federating], false)
+
+    conn =
+      build_conn()
+      |> MobilizonWeb.Plugs.Federating.call(%{})
+
+    assert conn.status == 404
+    assert conn.halted
+  end
+
+  test "does nothing when federating is enabled" do
+    Mobilizon.Config.put([:instance, :federating], true)
+
+    conn =
+      build_conn()
+      |> MobilizonWeb.Plugs.Federating.call(%{})
+
+    refute conn.status
+    refute conn.halted
+  end
+end