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Elixir Z-Wave library
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lib/grizzly/command_class/multi_channel_association.ex
defmodule Grizzly.CommandClass.MultiChannelAssociation do
alias Grizzly.Node
require Logger
@type associated_nodes :: [Node.node_id()]
@type endpoints :: [endpoint]
@type endpoint :: %{node_id: byte, endpoint: byte}
@type multi_channel_association_report :: %{
group: byte,
max_nodes_supported: byte,
nodes: associated_nodes,
endpoints: endpoints
}
@multi_channel_association_marker 0x00
def marker() do
@multi_channel_association_marker
end
@spec encode_endpoints(endpoints) :: {:ok, binary}
def encode_endpoints(endpoints) do
encoded =
Enum.reduce(
endpoints,
[],
fn %{node_id: node_id, endpoint: endpoint}, acc ->
[endpoint, node_id | acc]
end
)
|> Enum.reverse()
|> :erlang.list_to_binary()
{:ok, encoded}
end
@spec decode_nodes_and_endpoints(binary) :: {associated_nodes, endpoints}
def decode_nodes_and_endpoints(binary) do
bytes = :erlang.binary_to_list(binary)
marker_index = Enum.find_index(bytes, &(&1 == @multi_channel_association_marker))
case Enum.split(bytes, marker_index) do
{[], []} ->
{[], []}
{nodes, [_marker | endpoint_bytes]} ->
endpoints = endpoints(endpoint_bytes)
{nodes, endpoints}
end
end
defp endpoints([]) do
[]
end
defp endpoints([node_id, endpoint | rest]) do
[%{node_id: node_id, endpoint: endpoint} | endpoints(rest)]
end
end