+ defp maybe_update_cc(activities, list_memberships, %User{ap_id: user_ap_id})
+ when is_list(list_memberships) and length(list_memberships) > 0 do
+ Enum.map(activities, fn
+ %{data: %{"bcc" => bcc}} = activity when is_list(bcc) and length(bcc) > 0 ->
+ if Enum.any?(bcc, &(&1 in list_memberships)) do
+ update_in(activity.data["cc"], &[user_ap_id | &1])
+ else
+ activity
+ end
+
+ activity ->
+ activity
+ end)
+ end
+
+ defp maybe_update_cc(activities, _, _), do: activities
+