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lib/grizzly/command_class/version/command_class_get.ex

defmodule Grizzly.CommandClass.Version.CommandClassGet do
@moduledoc """
Command module for working with `VERSION_COMMAND_CLASS` command class
`COMMAND_CLASS_GET` command
Command Options:
* `:seq_number` - the sequence number used by the Z/IP packet
* `:command_class` - the command class you want to get the version for
* `:retries` - the number of attempts to send the command (default 2)
"""
@behaviour Grizzly.Command
alias Grizzly.Packet
alias Grizzly.Command.{EncodeError, Encoding}
alias Grizzly.CommandClass.Version
@type t :: %__MODULE__{
seq_number: Grizzly.seq_number(),
command_class: atom,
retries: non_neg_integer()
}
@type opt ::
{:seq_number, Grizzly.seq_number()}
| {:command_class, atom}
| {:retries, non_neg_integer()}
defstruct seq_number: nil, command_class: nil, retries: 2
@spec init([opt]) :: {:ok, t}
def init(opts) do
{:ok, struct(__MODULE__, opts)}
end
@spec encode(t) :: {:ok, binary} | {:error, EncodeError.t()}
def encode(%__MODULE__{seq_number: seq_number} = command) do
with {:ok, encoded} <-
Encoding.encode_and_validate_args(command, %{
command_class: {:encode_with, Version, :encode_command_class}
}) do
binary = Packet.header(seq_number) <> <<0x86, 0x13, encoded.command_class>>
{:ok, binary}
end
end
@spec handle_response(t, Packet.t()) ::
{:continue, t}
| {:done, {:error, :nack_response}}
| {:done, {:ok, 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: Version,
command: :report,
value: value
}
}) do
{:done, {:ok, value}}
end
def handle_response(
%__MODULE__{seq_number: seq_number} = command,
%Packet{
seq_number: seq_number,
types: [:nack_response, :nack_waiting]
} = packet
) do
if Packet.sleeping_delay?(packet) do
{:queued, command}
else
{:continue, command}
end
end
def handle_response(command, _), do: {:continue, command}
end