Add UserEnabledPlug.

lib/pleroma/plugs/user_enabled_plug.ex

@@ -0,0 +1,17 @@
+defmodule Pleroma.Plugs.UserEnabledPlug do
+  import Plug.Conn
+  alias Pleroma.User
+
+  def init(options) do
+    options
+  end
+
+  def call(%{assigns: %{user: %User{info: %{"deactivated" => true}}}} = conn, _) do
+    conn
+    |> assign(:user, nil)
+  end
+
+  def call(conn, _) do
+    conn
+  end
+end

test/plugs/user_enabled_plug_test.exs

@@ -0,0 +1,35 @@
+defmodule Pleroma.Plugs.UserEnabledPlugTest do
+  use Pleroma.Web.ConnCase, async: true
+
+  alias Pleroma.Plugs.UserEnabledPlug
+  alias Pleroma.User
+
+  test "doesn't do anything if the user isn't set", %{conn: conn} do
+    ret_conn =
+      conn
+      |> UserEnabledPlug.call(%{})
+
+    assert ret_conn == conn
+  end
+
+  test "with a user that is deactivated, it removes that user", %{conn: conn} do
+    conn =
+      conn
+      |> assign(:user, %User{info: %{"deactivated" => true}})
+      |> UserEnabledPlug.call(%{})
+
+    assert conn.assigns.user == nil
+  end
+
+  test "with a user that is not deactivated, it does nothing", %{conn: conn} do
+    conn =
+      conn
+      |> assign(:user, %User{})
+
+    ret_conn =
+      conn
+      |> UserEnabledPlug.call(%{})
+
+    assert conn == ret_conn
+  end
+end