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Elixir Z-Wave library
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lib/grizzly/zwave/commands/indicator_description_report.ex
defmodule Grizzly.ZWave.Commands.IndicatorDescriptionReport do
@moduledoc """
This command is used to advertise appearance and use of an indicator ID resource.
Params:
* `:indicator_id` - This field is used to specify the actual indicator resource (required)
* `:description` - This field is used to advertise the appearance and use of the Indicator ID
"""
@behaviour Grizzly.ZWave.Command
alias Grizzly.ZWave.{Command, DecodeError}
alias Grizzly.ZWave.CommandClasses.Indicator
@type param :: {:indicator_id, Indicator.indicator_id()} | {:description, String.t()}
@impl true
@spec new([param()]) :: {:ok, Command.t()}
def new(params) do
command = %Command{
name: :indicator_description_report,
command_byte: 0x07,
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_byte = Command.param!(command, :indicator_id) |> Indicator.indicator_id_to_byte()
description = Command.param!(command, :description)
size = byte_size(description)
<<indicator_id_byte, size>> <> description
end
@impl true
@spec decode_params(binary()) :: {:ok, [param()]} | {:error, DecodeError.t()}
def decode_params(<<indicator_id_byte, _size, description::binary>>) do
with {:ok, indicator_id} <- Indicator.indicator_id_from_byte(indicator_id_byte) do
{:ok, [indicator_id: indicator_id, description: description]}
else
{:error, %DecodeError{} = decode_error} ->
{:error, %DecodeError{decode_error | command: :indicator_description_report}}
end
end
end