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56 lines
1.9 KiB
Python
56 lines
1.9 KiB
Python
"""Helpers for WLED."""
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from __future__ import annotations
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from collections.abc import Callable, Coroutine
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from typing import Any, Concatenate
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from wled import WLEDConnectionError, WLEDError
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from homeassistant.exceptions import HomeAssistantError
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from .const import DOMAIN
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from .entity import WLEDEntity
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def wled_exception_handler[_WLEDEntityT: WLEDEntity, **_P](
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func: Callable[Concatenate[_WLEDEntityT, _P], Coroutine[Any, Any, Any]],
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) -> Callable[Concatenate[_WLEDEntityT, _P], Coroutine[Any, Any, None]]:
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"""Decorate WLED calls to handle WLED exceptions.
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A decorator that wraps the passed in function, catches WLED errors,
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and handles the availability of the device in the data coordinator.
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"""
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async def handler(self: _WLEDEntityT, *args: _P.args, **kwargs: _P.kwargs) -> None:
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try:
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await func(self, *args, **kwargs)
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self.coordinator.async_update_listeners()
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except WLEDConnectionError as error:
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self.coordinator.last_update_success = False
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self.coordinator.async_update_listeners()
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raise HomeAssistantError(
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translation_domain=DOMAIN,
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translation_key="connection_error",
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translation_placeholders={"error": str(error)},
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) from error
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except WLEDError as error:
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raise HomeAssistantError(
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translation_domain=DOMAIN,
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translation_key="invalid_response_wled_error",
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translation_placeholders={"error": str(error)},
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) from error
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return handler
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def kelvin_to_255(k: int, min_k: int, max_k: int) -> int:
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"""Map color temperature in K from minK-maxK to 0-255."""
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return int((k - min_k) / (max_k - min_k) * 255)
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def kelvin_to_255_reverse(v: int, min_k: int, max_k: int) -> int:
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"""Map color temperature from 0-255 to minK-maxK K."""
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return int(v / 255 * (max_k - min_k) + min_k)
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