mirror of
https://github.com/home-assistant/core
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96 lines
3.2 KiB
Python
96 lines
3.2 KiB
Python
"""Tradfri DataUpdateCoordinator."""
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from __future__ import annotations
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from collections.abc import Callable
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from datetime import timedelta
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from typing import Any
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from pytradfri.command import Command
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from pytradfri.device import Device
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from pytradfri.error import RequestError
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from homeassistant.core import HomeAssistant, callback
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from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
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from .const import LOGGER
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SCAN_INTERVAL = 60 # Interval for updating the coordinator
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class TradfriDeviceDataUpdateCoordinator(DataUpdateCoordinator[Device]):
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"""Coordinator to manage data for a specific Tradfri device."""
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def __init__(
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self,
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hass: HomeAssistant,
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*,
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api: Callable[[Command | list[Command]], Any],
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device: Device,
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) -> None:
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"""Initialize device coordinator."""
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self.api = api
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self.device = device
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self._exception: Exception | None = None
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super().__init__(
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hass,
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LOGGER,
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name=f"Update coordinator for {device}",
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update_interval=timedelta(seconds=SCAN_INTERVAL),
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)
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async def set_hub_available(self, available: bool) -> None:
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"""Set status of hub."""
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if available != self.last_update_success:
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if not available:
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self.last_update_success = False
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await self.async_request_refresh()
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@callback
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def _observe_update(self, device: Device) -> None:
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"""Update the coordinator for a device when a change is detected."""
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self.async_set_updated_data(data=device)
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@callback
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def _exception_callback(self, exc: Exception) -> None:
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"""Schedule handling exception.."""
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self.hass.async_create_task(self._handle_exception(exc))
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async def _handle_exception(self, exc: Exception) -> None:
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"""Handle observe exceptions in a coroutine."""
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# Store exception so that it gets raised in _async_update_data
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self._exception = exc
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LOGGER.debug(
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"Observation failed for %s, trying again", self.device, exc_info=exc
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)
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# Change interval so we get a swift refresh
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self.update_interval = timedelta(seconds=5)
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await self.async_request_refresh()
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async def _async_update_data(self) -> Device:
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"""Fetch data from the gateway for a specific device."""
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try:
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if self._exception:
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exc = self._exception
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self._exception = None # Clear stored exception
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raise exc
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except RequestError as err:
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raise UpdateFailed(f"Error communicating with API: {err}.") from err
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if not self.data or not self.last_update_success: # Start subscription
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try:
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cmd = self.device.observe(
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callback=self._observe_update,
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err_callback=self._exception_callback,
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duration=0,
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)
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await self.api(cmd)
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except RequestError as err:
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raise UpdateFailed(f"Error communicating with API: {err}.") from err
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# Reset update interval
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self.update_interval = timedelta(seconds=SCAN_INTERVAL)
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return self.device
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