Handle user update asynchronously

[upstarter]

Find a way to pass a function to state in user-defined update function so that the update can be run async as a Task so subsequent ticks will return :bh_running until the task completes (which sets the resulting status). This makes the agent reactive. Or is there a better more elixir way to do this? I'm thinking similar to this:

  def handle_cast({:run, fun}, state) do
    Task.async(fun) # sends a message back to the automaton when completed
    {:noreply, state}
  end

  # handle_info/2 receives generic messages from the Task processes
  def handle_info({_task, {:ok, result}}, state) do
    new_state = %{state | status: result}
    {:noreply, new_state}
  end

  def handle_info({_task, {:error, reason}}, state) do
    state = %{state | status: :bh_failure, fail_reason: reason}
    {:noreply, state}
  end