43 lines
1.5 KiB
Python
43 lines
1.5 KiB
Python
"""Spook - Your homie."""
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from __future__ import annotations
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from typing import TYPE_CHECKING
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from homeassistant.exceptions import HomeAssistantError
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if TYPE_CHECKING:
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from homeassistant.components.number import NumberEntity
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def shown_value_as_float(entity: NumberEntity) -> float:
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"""Return the value of a number entity, as it shows it, as a float.
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In the units it shows, which are not always the units it works in: a
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thermostat that keeps Celsius can be shown in Fahrenheit. Stepping from
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this means stepping in what somebody sees, and the result has to go back
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through `async_set_shown_value` to land in the units the entity keeps.
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"""
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try:
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return float(entity.value)
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except (TypeError, ValueError) as err:
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msg = f"Value {entity.value!r} for {entity.entity_id} is not a number"
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raise HomeAssistantError(msg) from err
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async def async_set_shown_value(entity: NumberEntity, value: float) -> None:
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"""Set a value given in the units the number shows, the way core does.
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Converted to the units the entity works in, and kept within the limits
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it has there. Handing the shown value over as it is set a thermostat
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showing 68 °F to 69 °C on a step of one degree.
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"""
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try:
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native_value = entity.convert_to_native_value(value)
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native_value = min(
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max(native_value, entity.native_min_value), entity.native_max_value
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)
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await entity.async_set_native_value(native_value)
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except NotImplementedError:
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await entity.async_set_value(value)
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