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Elixir Z-Wave library
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lib/grizzly/zwave/commands/clock_set.ex
defmodule Grizzly.ZWave.Commands.ClockSet do
@moduledoc """
This command is used to set the current time in a supporting node
Params:
* `:weekday` - the day of the week, one of :sunday, :monday, etc. (required)
* `:hour` - 0..23 (required)
* `:minute` - 0..59 (required)
"""
@behaviour Grizzly.ZWave.Command
alias Grizzly.ZWave.{Command, DecodeError}
alias Grizzly.ZWave.CommandClasses.Clock
@type param :: {:weekday, Clock.weekday()} | {:hour, 0..23} | {:minute, 0..59}
@impl true
@spec new([param()]) :: {:ok, Command.t()}
def new(params) do
command = %Command{
name: :clock_set,
command_byte: 0x04,
command_class: Clock,
params: params,
impl: __MODULE__
}
{:ok, command}
end
@impl true
@spec encode_params(Command.t()) :: binary()
def encode_params(command) do
encoded_weekday = Command.param!(command, :weekday) |> Clock.encode_weekday()
hour = Command.param!(command, :hour)
minute = Command.param!(command, :minute)
<<encoded_weekday::3, hour::5, minute>>
end
@impl true
@spec decode_params(binary()) :: {:ok, [param()]} | {:error, DecodeError.t()}
def decode_params(<<encoded_weekday::3, hour::5, minute>>) do
with {:ok, weekday} <- Clock.decode_weekday(encoded_weekday) do
if hour in 0..23 do
if minute in 0..59 do
{:ok, [weekday: weekday, hour: hour, minute: minute]}
else
{:error, %DecodeError{param: :minute, value: minute, command: :clock_set}}
end
else
{:error, %DecodeError{param: :hour, value: hour, command: :clock_set}}
end
else
{:error, decode_error} ->
{:error, %DecodeError{decode_error | command: :clock_set}}
end
end
end