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Elixir Z-Wave library
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lib/grizzly/virtual_devices/virtual_devices_registry.ex
defmodule Grizzly.VirtualDevicesRegistry do
@moduledoc false
alias Grizzly.VirtualDevices
alias Grizzly.VirtualDevices.Device
alias Grizzly.ZWave.DeviceClass
@type start_opts() :: [
{:keys, :unique},
{:name, module()},
meta: [{:inclusion_handler, Grizzly.handler()}]
]
@doc """
Function to return the options for starting this registry
"""
@spec start_options(Grizzly.Options.t()) :: start_opts()
def start_options(grizzly_opts) do
[keys: :unique, name: __MODULE__, meta: [inclusion_handler: grizzly_opts.inclusion_handler]]
end
@doc """
Register the virtual device
"""
@spec register(VirtualDevices.id(), Device.t(), DeviceClass.t(), [Device.device_opt()]) ::
{:ok, VirtualDevices.device_entry()}
| {:error, {:already_registered, VirtualDevices.device_entry()}}
def register({:virtual, id} = device_id, device_impl, device_class, device_opts)
when is_integer(id) and id > 0 do
entry = %{
device_impl: device_impl,
device_class: device_class,
id: device_id,
device_opts: device_opts
}
case Registry.register(__MODULE__, device_id, entry) do
{:ok, pid} ->
{:ok, Map.put(entry, :pid, pid)}
{:error, {:already_registered, _pid}} ->
{:error, {:already_registered, get(device_id)}}
end
end
@doc """
Unregister a device from the registry
"""
@spec unregister(VirtualDevices.id()) :: :ok
def unregister(device_id) do
Registry.unregister(__MODULE__, device_id)
end
@doc """
Get a device entry by the virtual device id
"""
@spec get(VirtualDevices.id()) :: VirtualDevices.device_entry() | nil
def get(device_id) do
case Registry.lookup(__MODULE__, device_id) do
[] ->
nil
[{pid, entry}] ->
Map.put(entry, :pid, pid)
end
end
@doc """
List all the ids of the registered virtual devices
"""
@spec list_ids() :: [VirtualDevices.id()]
def list_ids() do
Registry.select(__MODULE__, [{{:"$1", :_, :_}, [], [:"$1"]}])
end
@doc """
Try to get the the handler that the registry was configured to use on start
"""
@spec get_handler() :: Grizzly.handler() | nil
def get_handler() do
case Registry.meta(__MODULE__, :inclusion_handler) do
{:ok, handler} -> handler
:error -> nil
end
end
end