defmodule Cafex.Protocol.LeaveGroup do
  use Cafex.Protocol, api: :leave_group

  defrequest do
    field :group_id, binary
    field :member_id, binary
  end

  defresponse do
    field :error, Cafex.Protocol.error
  end

  def encode(%{group_id: group_id, member_id: member_id}) do
    [encode_string(group_id),
     encode_string(member_id)]
    |> IO.iodata_to_binary
  end

  def decode(<< error_code :: 16-signed >>) do
    %Response{error: decode_error(error_code)}
  end
end