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Elixir Z-Wave library
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lib/grizzly/command_class/user_code/users_number_get.ex
defmodule Grizzly.CommandClass.UserCode.UsersNumberGet do
@moduledoc """
Command module for working with USER_CODE USER_NUMBER_GET command
Request the number of user codes available on device
command options:
* `:seq_number` - The sequence number for the Z/IP Packet
* `:retries` - The number times to retry to send the command (default 2)
"""
@behaviour Grizzly.Command
alias Grizzly.Packet
@type t :: %__MODULE__{
seq_number: Grizzly.seq_number(),
retries: non_neg_integer()
}
@type opt :: {:seq_number, Grizzly.seq_number()} | {:retries, non_neg_integer()}
defstruct seq_number: nil, retries: 2
@spec init([opt]) :: {:ok, t}
def init(opts) do
{:ok, struct(__MODULE__, opts)}
end
@spec encode(t) :: {:ok, binary}
def encode(%__MODULE__{seq_number: seq_number}) do
binary = Packet.header(seq_number) <> <<0x63, 0x04>>
{:ok, binary}
end
@spec handle_response(t, Packet.t()) ::
{:continue, t}
| {:done, {:error, :nack_response}}
| {:done, non_neg_integer}
| {:retry, t}
def handle_response(%__MODULE__{seq_number: seq_number} = command, %Packet{
seq_number: seq_number,
types: [:ack_response]
}) do
{:continue, command}
end
def handle_response(%__MODULE__{seq_number: seq_number, retries: 0}, %Packet{
seq_number: seq_number,
types: [:nack_response]
}) do
{:done, {:error, :nack_response}}
end
def handle_response(%__MODULE__{seq_number: seq_number, retries: n} = command, %Packet{
seq_number: seq_number,
types: [:nack_response]
}) do
{:retry, %{command | retries: n - 1}}
end
def handle_response(_command, %Packet{
body: %{
command_class: :user_code,
command: :users_number_report,
value: number_of_slots
}
}) do
{:done, {:ok, number_of_slots}}
end
def handle_response(command, _), do: {:continue, command}
end