defmodule Grizzly.ZWave.Commands.IndicatorGet do
@moduledoc """
This command is used to request the state of an indicator.
Params:
* `:indicator_id` - This field is used to specify the actual indicator resource (required for v2)
"""
@behaviour Grizzly.ZWave.Command
alias Grizzly.ZWave.{Command, DecodeError}
alias Grizzly.ZWave.CommandClasses.Indicator
@type param :: {:indicator_id, Indicator.indicator_id()}
@impl true
@spec new([param()]) :: {:ok, Command.t()}
def new(params) do
command = %Command{
name: :indicator_get,
command_byte: 0x02,
command_class: Indicator,
params: params,
impl: __MODULE__
}
{:ok, command}
end
@impl true
@spec encode_params(Command.t()) :: binary()
def encode_params(command) do
indicator_id = Command.param(command, :indicator_id)
if indicator_id == nil do
<<>>
else
indicator_id_byte = Indicator.indicator_id_to_byte(indicator_id)
<<indicator_id_byte>>
end
end
@impl true
@spec decode_params(binary()) :: {:ok, [param()]} | {:error, DecodeError.t()}
def decode_params(<<>>) do
{:ok, []}
end
def decode_params(<<indicator_id_byte>>) do
with {:ok, indicator_id} <- Indicator.indicator_id_from_byte(indicator_id_byte) do
{:ok, [indicator_id: indicator_id]}
else
{:error, %DecodeError{} = decode_error} ->
{:error, %DecodeError{decode_error | command: :indicator_get}}
end
end
end