python-kasa/kasa/smart/smartmodule.py

215 lines
7.1 KiB
Python
Raw Normal View History

"""Base implementation for SMART modules."""
from __future__ import annotations
import logging
from collections.abc import Awaitable, Callable, Coroutine
from typing import TYPE_CHECKING, Any
from typing_extensions import Concatenate, ParamSpec, TypeVar
from ..exceptions import DeviceError, KasaException, SmartErrorCode
from ..module import Module
if TYPE_CHECKING:
from .smartdevice import SmartDevice
_LOGGER = logging.getLogger(__name__)
_T = TypeVar("_T", bound="SmartModule")
_P = ParamSpec("_P")
_R = TypeVar("_R")
def allow_update_after(
func: Callable[Concatenate[_T, _P], Awaitable[None]],
) -> Callable[Concatenate[_T, _P], Coroutine[Any, Any, None]]:
"""Define a wrapper to set _last_update_time to None.
This will ensure that a module is updated in the next update cycle after
a value has been changed.
"""
async def _async_wrap(self: _T, *args: _P.args, **kwargs: _P.kwargs) -> None:
try:
await func(self, *args, **kwargs)
finally:
self._last_update_time = None
return _async_wrap
def raise_if_update_error(func: Callable[[_T], _R]) -> Callable[[_T], _R]:
"""Define a wrapper to raise an error if the last module update was an error."""
def _wrap(self: _T) -> _R:
if err := self._last_update_error:
raise err
return func(self)
return _wrap
class SmartModule(Module):
"""Base class for SMART modules."""
NAME: str
#: Module is initialized, if the given component is available
REQUIRED_COMPONENT: str | None = None
#: Module is initialized, if the given key available in the main sysinfo
REQUIRED_KEY_ON_PARENT: str | None = None
#: Query to execute during the main update cycle
QUERY_GETTER_NAME: str
REGISTERED_MODULES: dict[str, type[SmartModule]] = {}
MINIMUM_UPDATE_INTERVAL_SECS = 0
UPDATE_INTERVAL_AFTER_ERROR_SECS = 30
DISABLE_AFTER_ERROR_COUNT = 10
def __init__(self, device: SmartDevice, module: str):
self._device: SmartDevice
super().__init__(device, module)
self._last_update_time: float | None = None
self._last_update_error: KasaException | None = None
self._error_count = 0
def __init_subclass__(cls, **kwargs):
# We only want to register submodules in a modules package so that
# other classes can inherit from smartmodule and not be registered
if cls.__module__.split(".")[-2] == "modules":
_LOGGER.debug("Registering %s", cls)
cls.REGISTERED_MODULES[cls.__name__] = cls
def _set_error(self, err: Exception | None):
if err is None:
self._error_count = 0
self._last_update_error = None
else:
self._last_update_error = KasaException("Module update error", err)
self._error_count += 1
if self._error_count == self.DISABLE_AFTER_ERROR_COUNT:
_LOGGER.error(
"Error processing %s for device %s, module will be disabled: %s",
self.name,
self._device.host,
err,
)
if self._error_count > self.DISABLE_AFTER_ERROR_COUNT:
_LOGGER.error( # pragma: no cover
"Unexpected error processing %s for device %s, "
"module should be disabled: %s",
self.name,
self._device.host,
err,
)
@property
def update_interval(self) -> int:
"""Time to wait between updates."""
if self._last_update_error is None:
return self.MINIMUM_UPDATE_INTERVAL_SECS
return self.UPDATE_INTERVAL_AFTER_ERROR_SECS * self._error_count
@property
def disabled(self) -> bool:
"""Return true if the module is disabled due to errors."""
return self._error_count >= self.DISABLE_AFTER_ERROR_COUNT
@property
def name(self) -> str:
"""Name of the module."""
return getattr(self, "NAME", self.__class__.__name__)
async def _post_update_hook(self): # noqa: B027
"""Perform actions after a device update.
Any modules overriding this should ensure that self.data is
accessed unless the module should remain active despite errors.
"""
assert self.data # noqa: S101
def query(self) -> dict:
"""Query to execute during the update cycle.
Default implementation uses the raw query getter w/o parameters.
"""
return {self.QUERY_GETTER_NAME: None}
async def call(self, method, params=None):
"""Call a method.
Just a helper method.
"""
return await self._device._query_helper(method, params)
@property
def data(self):
"""Return response data for the module.
If the module performs only a single query, the resulting response is unwrapped.
If the module does not define a query, this property returns a reference
to the main "get_device_info" response.
"""
dev = self._device
q = self.query()
if not q:
return dev.sys_info
q_keys = list(q.keys())
query_key = q_keys[0]
# TODO: hacky way to check if update has been called.
# The way this falls back to parent may not always be wanted.
# Especially, devices can have their own firmware updates.
if query_key not in dev._last_update:
if dev._parent and query_key in dev._parent._last_update:
_LOGGER.debug("%s not found child, but found on parent", query_key)
dev = dev._parent
else:
raise KasaException(
f"You need to call update() prior accessing module data"
f" for '{self._module}'"
)
filtered_data = {k: v for k, v in dev._last_update.items() if k in q_keys}
for data_item in filtered_data:
if isinstance(filtered_data[data_item], SmartErrorCode):
raise DeviceError(
f"{data_item} for {self.name}", error_code=filtered_data[data_item]
)
if len(filtered_data) == 1:
return next(iter(filtered_data.values()))
return filtered_data
@property
def supported_version(self) -> int:
"""Return version supported by the device.
If the module has no required component, this will return -1.
"""
if self.REQUIRED_COMPONENT is not None:
return self._device._components[self.REQUIRED_COMPONENT]
return -1
async def _check_supported(self) -> bool:
"""Additional check to see if the module is supported by the device.
Used for parents who report components on the parent that are only available
on the child or for modules where the device has a pointless component like
color_temp_range but only supports one value.
"""
return True
def _has_data_error(self) -> bool:
try:
assert self.data # noqa: S101
return False
except DeviceError:
return True