slider_channel.ex

defmodule Grains.SliderChannel do
  use Grains.Web, :channel

  alias Grains.StatefulMap
  alias Grains.ValueView

  def join("slider:" <> slider_id, _params, socket) do
    values = StatefulMap.values()

    resp = %{values: Phoenix.View.render_many(values, ValueView, "value.json") }
    {:ok, resp, socket}
  end

  def handle_in("slider", params, socket) do

    IO.puts "slider: #{params["slider"]} : #{params["value"]}"
    slider = params["slider"]
    value = params["value"]

    StatefulMap.put(slider, value)

    broadcast! socket, "slider", %{
      user: %{id: "anon"},
      element: slider,
      value: value
    }

    {:reply, :ok, socket}

  end



end