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Elixir Z-Wave library
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lib/grizzly/zwave/commands/extended_user_code_report.ex
defmodule Grizzly.ZWave.Commands.ExtendedUserCodeReport do
@moduledoc """
This command is used to report the user code of a specific user identifier.
## Params
* `:user_codes` - A list of user codes. This field must respect the Z-Wave MAC
frame or Transport service limits when sending this command, which typically
means there should be no more than 8 user codes per command. It is up to
the sender to ensure this limit is respected.
"""
@behaviour Grizzly.ZWave.Command
alias Grizzly.ZWave.Command
alias Grizzly.ZWave.CommandClasses.UserCode
@type param ::
{:user_codes, [UserCode.extended_user_code()]}
| {:next_user_id, UserCode.extended_user_id()}
@impl Grizzly.ZWave.Command
def encode_params(_spec, command) do
user_codes = Command.param!(command, :user_codes)
next_user_id = Command.param(command, :next_user_id, 0) || 0
user_codes_bin =
for code <- user_codes, into: <<length(user_codes)::8>> do
UserCode.encode_extended_user_code(code)
end
user_codes_bin <> <<next_user_id::16>>
end
@impl Grizzly.ZWave.Command
def decode_params(_spec, <<_user_codes_count::8, user_codes::binary>>) do
case UserCode.decode_extended_user_codes(user_codes) do
{codes, <<next_user_id::16>>} ->
{:ok, [user_codes: codes, next_user_id: next_user_id]}
# This case is technically not allowed by spec, but some locks omit the
# next_user_id field when only reporting a single user code.
{codes, <<>>} ->
{:ok, [user_codes: codes, next_user_id: 0]}
end
end
end