livebook/proto/lib/livebook_proto.ex

defmodule LivebookProto do
  @moduledoc false

  alias LivebookProto.Request

  @mapping (for {_id, field_prop} <- Request.__message_props__().field_props,
                into: %{} do
              {field_prop.type, field_prop.name_atom}
            end)

  def build_request_frame(%struct{} = data, id \\ -1) do
    type = request_type(struct)
    message = Request.new!(id: id, type: {type, data})

    {:binary, Request.encode(message)}
  end

  defp request_type(module), do: Map.fetch!(@mapping, module)
end