Disallow deletion of accounts when a data export is pending

app/controllers/user/registrations_controller.rb

@@ -8,6 +8,12 @@ class User::RegistrationsController < Devise::RegistrationsController
   end
 
   def destroy
+    if resource.export_processing
+      flash[:error] = t(".export_pending")
+      redirect_to edit_user_registration_path
+      return
+    end
+
     Devise.sign_out_all_scopes ? sign_out : sign_out(resource_name)
     resource.destroy
     set_flash_message :notice, :destroyed if is_flashing_format?

config/locales/controllers.en.yml

@@ -197,3 +197,6 @@ en:
       create:
         info: "You have %{count} recovery codes remaining."
         error: :errors.invalid_otp
+    registrations:
+      destroy:
+        export_pending: "You may not delete your account while account data is currently being exported."