47 lines
1.5 KiB
Python
47 lines
1.5 KiB
Python
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"""Helpers for LaMetric."""
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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, TypeVar
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from demetriek import LaMetricConnectionError, LaMetricError
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from typing_extensions import Concatenate, ParamSpec
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from homeassistant.exceptions import HomeAssistantError
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from .entity import LaMetricEntity
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_LaMetricEntityT = TypeVar("_LaMetricEntityT", bound=LaMetricEntity)
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_P = ParamSpec("_P")
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def lametric_exception_handler(
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func: Callable[Concatenate[_LaMetricEntityT, _P], Coroutine[Any, Any, Any]]
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) -> Callable[Concatenate[_LaMetricEntityT, _P], Coroutine[Any, Any, None]]:
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"""Decorate LaMetric calls to handle LaMetric exceptions.
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A decorator that wraps the passed in function, catches LaMetric 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(
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self: _LaMetricEntityT, *args: _P.args, **kwargs: _P.kwargs
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) -> 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 LaMetricConnectionError 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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"Error communicating with the LaMetric device"
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) from error
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except LaMetricError as error:
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raise HomeAssistantError(
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"Invalid response from the LaMetric device"
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) from error
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return handler
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