python-kasa/kasa/feature.py

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"""Generic interface for defining device features."""
from dataclasses import dataclass
from enum import Enum, auto
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from typing import TYPE_CHECKING, Any, Callable
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if TYPE_CHECKING:
from .device import Device
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class FeatureCategory(Enum):
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"""Feature category."""
# TODO: we could probably do better than using the scheme homeassistant is using
Config = auto()
Diagnostic = auto()
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class FeatureType(Enum):
"""Type to help decide how to present the feature."""
Sensor = auto()
BinarySensor = auto()
Switch = auto()
Button = auto()
@dataclass
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class Feature:
"""Feature defines a generic interface for device features."""
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#: Device instance required for getting and setting values
device: "Device"
#: User-friendly short description
name: str
#: Name of the property that allows accessing the value
attribute_getter: str | Callable
#: Name of the method that allows changing the value
attribute_setter: str | None = None
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#: Container storing the data, this overrides 'device' for getters
container: Any = None
#: Icon suggestion
icon: str | None = None
#: Hint for homeassistant
#: TODO: Replace with a set of flags to allow homeassistant make its own decision?
show_in_hass: bool = True
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category: FeatureCategory = FeatureCategory.Diagnostic
type: FeatureType = FeatureType.Sensor
@property
def value(self):
"""Return the current value."""
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container = self.container if self.container is not None else self.device
if isinstance(self.attribute_getter, Callable):
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return self.attribute_getter(container)
return getattr(container, self.attribute_getter)
async def set_value(self, value):
"""Set the value."""
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if self.attribute_setter is None:
raise ValueError("Tried to set read-only feature.")
return await getattr(self.device, self.attribute_setter)(value)