chronoscope/lib/chronoscope_web/live/index_live.ex

defmodule ChronoscopeWeb.IndexLive do
  use ChronoscopeWeb, :live_view

  alias Chronoscope.NTS
  alias Chronoscope.NTS.KeyEstablishmentResponse

  @topic Application.compile_env(:chronoscope, :nts_topic)

  def mount(_params, _session, socket) do
    ChronoscopeWeb.Endpoint.subscribe(@topic)
    {:ok, assign(socket, %{servers: server_list()})}
  end

  def handle_info(%{topic: @topic}, socket) do
    {:noreply, assign(socket, %{servers: server_list()})}
  end

  defp server_list() do
    Chronoscope.Monitor
    |> GenServer.call(:get_nts_servers)
    |> NTS.list_clients()
  end
end