python-kasa/kasa/device.py
Steven B be5202ccb7
Make device initialisation easier by reducing required imports (#936)
Adds username and password arguments to discovery to remove the need to import Credentials.
Creates TypeAliases in Device for connection configuration classes and DeviceType.
Using the API with these changes will only require importing either Discover or Device
depending on whether using Discover.discover() or Device.connect() to 
initialize and interact with the API.
2024-06-03 19:06:54 +01:00

438 lines
14 KiB
Python

"""Module for Device base class."""
from __future__ import annotations
import logging
from abc import ABC, abstractmethod
from dataclasses import dataclass
from datetime import datetime
from typing import TYPE_CHECKING, Any, Mapping, Sequence
from warnings import warn
from typing_extensions import TypeAlias
from .credentials import Credentials as _Credentials
from .device_type import DeviceType
from .deviceconfig import (
DeviceConfig,
DeviceConnectionParameters,
DeviceEncryptionType,
DeviceFamily,
)
from .emeterstatus import EmeterStatus
from .exceptions import KasaException
from .feature import Feature
from .iotprotocol import IotProtocol
from .module import Module
from .protocol import BaseProtocol
from .xortransport import XorTransport
if TYPE_CHECKING:
from .modulemapping import ModuleMapping, ModuleName
@dataclass
class WifiNetwork:
"""Wifi network container."""
ssid: str
key_type: int
# These are available only on softaponboarding
cipher_type: int | None = None
bssid: str | None = None
channel: int | None = None
rssi: int | None = None
# For SMART devices
signal_level: int | None = None
_LOGGER = logging.getLogger(__name__)
class Device(ABC):
"""Common device interface.
Do not instantiate this class directly, instead get a device instance from
:func:`Device.connect()`, :func:`Discover.discover()`
or :func:`Discover.discover_single()`.
"""
# All types required to create devices directly via connect are aliased here
# to avoid consumers having to do multiple imports.
#: The type of device
Type: TypeAlias = DeviceType
#: The credentials for authentication
Credentials: TypeAlias = _Credentials
#: Configuration for connecting to the device
Config: TypeAlias = DeviceConfig
#: The family of the device, e.g. SMART.KASASWITCH.
Family: TypeAlias = DeviceFamily
#: The encryption for the device, e.g. Klap or Aes
EncryptionType: TypeAlias = DeviceEncryptionType
#: The connection type for the device.
ConnectionParameters: TypeAlias = DeviceConnectionParameters
def __init__(
self,
host: str,
*,
config: DeviceConfig | None = None,
protocol: BaseProtocol | None = None,
) -> None:
"""Create a new Device instance.
:param str host: host name or IP address of the device
:param DeviceConfig config: device configuration
:param BaseProtocol protocol: protocol for communicating with the device
"""
if config and protocol:
protocol._transport._config = config
self.protocol: BaseProtocol = protocol or IotProtocol(
transport=XorTransport(config=config or DeviceConfig(host=host)),
)
_LOGGER.debug("Initializing %s of type %s", self.host, type(self))
self._device_type = DeviceType.Unknown
# TODO: typing Any is just as using Optional[Dict] would require separate
# checks in accessors. the @updated_required decorator does not ensure
# mypy that these are not accessed incorrectly.
self._last_update: Any = None
self._discovery_info: dict[str, Any] | None = None
self._features: dict[str, Feature] = {}
self._parent: Device | None = None
self._children: Mapping[str, Device] = {}
@staticmethod
async def connect(
*,
host: str | None = None,
config: DeviceConfig | None = None,
) -> Device:
"""Connect to a single device by the given hostname or device configuration.
This method avoids the UDP based discovery process and
will connect directly to the device.
It is generally preferred to avoid :func:`discover_single()` and
use this function instead as it should perform better when
the WiFi network is congested or the device is not responding
to discovery requests.
:param host: Hostname of device to query
:param config: Connection parameters to ensure the correct protocol
and connection options are used.
:rtype: SmartDevice
:return: Object for querying/controlling found device.
"""
from .device_factory import connect # pylint: disable=import-outside-toplevel
return await connect(host=host, config=config) # type: ignore[arg-type]
@abstractmethod
async def update(self, update_children: bool = True):
"""Update the device."""
async def disconnect(self):
"""Disconnect and close any underlying connection resources."""
await self.protocol.close()
@property
@abstractmethod
def modules(self) -> ModuleMapping[Module]:
"""Return the device modules."""
@property
@abstractmethod
def is_on(self) -> bool:
"""Return true if the device is on."""
@property
def is_off(self) -> bool:
"""Return True if device is off."""
return not self.is_on
@abstractmethod
async def turn_on(self, **kwargs) -> dict | None:
"""Turn on the device."""
@abstractmethod
async def turn_off(self, **kwargs) -> dict | None:
"""Turn off the device."""
@abstractmethod
async def set_state(self, on: bool):
"""Set the device state to *on*.
This allows turning the device on and off.
See also *turn_off* and *turn_on*.
"""
@property
def host(self) -> str:
"""The device host."""
return self.protocol._transport._host
@host.setter
def host(self, value):
"""Set the device host.
Generally used by discovery to set the hostname after ip discovery.
"""
self.protocol._transport._host = value
self.protocol._transport._config.host = value
@property
def port(self) -> int:
"""The device port."""
return self.protocol._transport._port
@property
def credentials(self) -> _Credentials | None:
"""The device credentials."""
return self.protocol._transport._credentials
@property
def credentials_hash(self) -> str | None:
"""The protocol specific hash of the credentials the device is using."""
return self.protocol._transport.credentials_hash
@property
def device_type(self) -> DeviceType:
"""Return the device type."""
return self._device_type
@abstractmethod
def update_from_discover_info(self, info):
"""Update state from info from the discover call."""
@property
def config(self) -> DeviceConfig:
"""Return the device configuration."""
return self.protocol.config
@property
@abstractmethod
def model(self) -> str:
"""Returns the device model."""
@property
@abstractmethod
def alias(self) -> str | None:
"""Returns the device alias or nickname."""
async def _raw_query(self, request: str | dict) -> Any:
"""Send a raw query to the device."""
return await self.protocol.query(request=request)
@property
def children(self) -> Sequence[Device]:
"""Returns the child devices."""
return list(self._children.values())
def get_child_device(self, id_: str) -> Device:
"""Return child device by its ID."""
return self._children[id_]
@property
@abstractmethod
def sys_info(self) -> dict[str, Any]:
"""Returns the device info."""
def get_plug_by_name(self, name: str) -> Device:
"""Return child device for the given name."""
for p in self.children:
if p.alias == name:
return p
raise KasaException(f"Device has no child with {name}")
def get_plug_by_index(self, index: int) -> Device:
"""Return child device for the given index."""
if index + 1 > len(self.children) or index < 0:
raise KasaException(
f"Invalid index {index}, device has {len(self.children)} plugs"
)
return self.children[index]
@property
@abstractmethod
def time(self) -> datetime:
"""Return the time."""
@property
@abstractmethod
def timezone(self) -> dict:
"""Return the timezone and time_difference."""
@property
@abstractmethod
def hw_info(self) -> dict:
"""Return hardware info for the device."""
@property
@abstractmethod
def location(self) -> dict:
"""Return the device location."""
@property
@abstractmethod
def rssi(self) -> int | None:
"""Return the rssi."""
@property
@abstractmethod
def mac(self) -> str:
"""Return the mac formatted with colons."""
@property
@abstractmethod
def device_id(self) -> str:
"""Return the device id."""
@property
@abstractmethod
def internal_state(self) -> Any:
"""Return all the internal state data."""
@property
def state_information(self) -> dict[str, Any]:
"""Return available features and their values."""
return {feat.name: feat.value for feat in self._features.values()}
@property
def features(self) -> dict[str, Feature]:
"""Return the list of supported features."""
return self._features
def _add_feature(self, feature: Feature):
"""Add a new feature to the device."""
if feature.id in self._features:
raise KasaException("Duplicate feature id %s" % feature.id)
assert feature.id is not None # TODO: hack for typing # noqa: S101
self._features[feature.id] = feature
@property
@abstractmethod
def has_emeter(self) -> bool:
"""Return if the device has emeter."""
@property
@abstractmethod
def on_since(self) -> datetime | None:
"""Return the time that the device was turned on or None if turned off."""
@abstractmethod
async def get_emeter_realtime(self) -> EmeterStatus:
"""Retrieve current energy readings."""
@property
@abstractmethod
def emeter_realtime(self) -> EmeterStatus:
"""Get the emeter status."""
@property
@abstractmethod
def emeter_this_month(self) -> float | None:
"""Get the emeter value for this month."""
@property
@abstractmethod
def emeter_today(self) -> float | None | Any:
"""Get the emeter value for today."""
# Return type of Any ensures consumers being shielded from the return
# type by @update_required are not affected.
@abstractmethod
async def wifi_scan(self) -> list[WifiNetwork]:
"""Scan for available wifi networks."""
@abstractmethod
async def wifi_join(self, ssid: str, password: str, keytype: str = "wpa2_psk"):
"""Join the given wifi network."""
@abstractmethod
async def set_alias(self, alias: str):
"""Set the device name (alias)."""
def __repr__(self):
if self._last_update is None:
return f"<{self.device_type} at {self.host} - update() needed>"
return f"<{self.device_type} at {self.host} - {self.alias} ({self.model})>"
_deprecated_device_type_attributes = {
# is_type
"is_bulb": (Module.Light, DeviceType.Bulb),
"is_dimmer": (Module.Light, DeviceType.Dimmer),
"is_light_strip": (Module.LightEffect, DeviceType.LightStrip),
"is_plug": (Module.Led, DeviceType.Plug),
"is_wallswitch": (Module.Led, DeviceType.WallSwitch),
"is_strip": (None, DeviceType.Strip),
"is_strip_socket": (None, DeviceType.StripSocket),
}
def _get_replacing_attr(self, module_name: ModuleName, *attrs):
if module_name not in self.modules:
return None
for attr in attrs:
if hasattr(self.modules[module_name], attr):
return getattr(self.modules[module_name], attr)
return None
_deprecated_other_attributes = {
# light attributes
"is_color": (Module.Light, ["is_color"]),
"is_dimmable": (Module.Light, ["is_dimmable"]),
"is_variable_color_temp": (Module.Light, ["is_variable_color_temp"]),
"brightness": (Module.Light, ["brightness"]),
"set_brightness": (Module.Light, ["set_brightness"]),
"hsv": (Module.Light, ["hsv"]),
"set_hsv": (Module.Light, ["set_hsv"]),
"color_temp": (Module.Light, ["color_temp"]),
"set_color_temp": (Module.Light, ["set_color_temp"]),
"valid_temperature_range": (Module.Light, ["valid_temperature_range"]),
"has_effects": (Module.Light, ["has_effects"]),
"_deprecated_set_light_state": (Module.Light, ["has_effects"]),
# led attributes
"led": (Module.Led, ["led"]),
"set_led": (Module.Led, ["set_led"]),
# light effect attributes
# The return values for effect is a str instead of dict so the lightstrip
# modules have a _deprecated method to return the value as before.
"effect": (Module.LightEffect, ["_deprecated_effect", "effect"]),
# The return values for effect_list includes the Off effect so the lightstrip
# modules have a _deprecated method to return the values as before.
"effect_list": (Module.LightEffect, ["_deprecated_effect_list", "effect_list"]),
"set_effect": (Module.LightEffect, ["set_effect"]),
"set_custom_effect": (Module.LightEffect, ["set_custom_effect"]),
# light preset attributes
"presets": (Module.LightPreset, ["_deprecated_presets", "preset_states_list"]),
"save_preset": (Module.LightPreset, ["_deprecated_save_preset"]),
}
def __getattr__(self, name):
# is_device_type
if dep_device_type_attr := self._deprecated_device_type_attributes.get(name):
module = dep_device_type_attr[0]
msg = f"{name} is deprecated"
if module:
msg += f", use: {module} in device.modules instead"
warn(msg, DeprecationWarning, stacklevel=1)
return self.device_type == dep_device_type_attr[1]
# Other deprecated attributes
if (dep_attr := self._deprecated_other_attributes.get(name)) and (
(replacing_attr := self._get_replacing_attr(dep_attr[0], *dep_attr[1]))
is not None
):
module_name = dep_attr[0]
msg = (
f"{name} is deprecated, use: "
+ f"Module.{module_name} in device.modules instead"
)
warn(msg, DeprecationWarning, stacklevel=1)
return replacing_attr
raise AttributeError(f"Device has no attribute {name!r}")