641 lines
24 KiB
Python
641 lines
24 KiB
Python
"""Helpers for managing a pairing with a HomeKit accessory or bridge."""
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from __future__ import annotations
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import asyncio
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from collections.abc import Callable
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from datetime import timedelta
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import logging
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from types import MappingProxyType
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from typing import Any
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from aiohomekit import Controller
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from aiohomekit.exceptions import (
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AccessoryDisconnectedError,
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AccessoryNotFoundError,
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EncryptionError,
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)
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from aiohomekit.model import Accessories, Accessory, Transport
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from aiohomekit.model.characteristics import Characteristic
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from aiohomekit.model.services import Service
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from homeassistant.config_entries import ConfigEntry
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from homeassistant.const import ATTR_VIA_DEVICE
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from homeassistant.core import CALLBACK_TYPE, HomeAssistant, callback
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from homeassistant.helpers import device_registry as dr
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from homeassistant.helpers.dispatcher import async_dispatcher_send
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from homeassistant.helpers.entity import DeviceInfo
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from homeassistant.helpers.event import async_track_time_interval
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from .const import (
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CHARACTERISTIC_PLATFORMS,
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CONTROLLER,
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DOMAIN,
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HOMEKIT_ACCESSORY_DISPATCH,
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IDENTIFIER_ACCESSORY_ID,
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IDENTIFIER_LEGACY_ACCESSORY_ID,
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IDENTIFIER_LEGACY_SERIAL_NUMBER,
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IDENTIFIER_SERIAL_NUMBER,
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)
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from .device_trigger import async_fire_triggers, async_setup_triggers_for_entry
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RETRY_INTERVAL = 60 # seconds
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MAX_POLL_FAILURES_TO_DECLARE_UNAVAILABLE = 3
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BLE_AVAILABILITY_CHECK_INTERVAL = 1800 # seconds
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_LOGGER = logging.getLogger(__name__)
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AddAccessoryCb = Callable[[Accessory], bool]
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AddServiceCb = Callable[[Service], bool]
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AddCharacteristicCb = Callable[[Characteristic], bool]
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def valid_serial_number(serial: str) -> bool:
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"""Return if the serial number appears to be valid."""
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if not serial:
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return False
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try:
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return float("".join(serial.rsplit(".", 1))) > 1
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except ValueError:
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return True
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class HKDevice:
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"""HomeKit device."""
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def __init__(
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self,
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hass: HomeAssistant,
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config_entry: ConfigEntry,
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pairing_data: MappingProxyType[str, Any],
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) -> None:
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"""Initialise a generic HomeKit device."""
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self.hass = hass
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self.config_entry = config_entry
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# We copy pairing_data because homekit_python may mutate it, but we
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# don't want to mutate a dict owned by a config entry.
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self.pairing_data = pairing_data.copy()
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connection: Controller = hass.data[CONTROLLER]
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self.pairing = connection.load_pairing(
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self.pairing_data["AccessoryPairingID"], self.pairing_data
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)
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# A list of callbacks that turn HK accessories into entities
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self.accessory_factories: list[AddAccessoryCb] = []
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# A list of callbacks that turn HK service metadata into entities
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self.listeners: list[AddServiceCb] = []
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# A list of callbacks that turn HK characteristics into entities
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self.char_factories: list[AddCharacteristicCb] = []
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# The platorms we have forwarded the config entry so far. If a new
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# accessory is added to a bridge we may have to load additional
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# platforms. We don't want to load all platforms up front if its just
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# a lightbulb. And we don't want to forward a config entry twice
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# (triggers a Config entry already set up error)
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self.platforms: set[str] = set()
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# This just tracks aid/iid pairs so we know if a HK service has been
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# mapped to a HA entity.
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self.entities: list[tuple[int, int | None, int | None]] = []
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# A map of aid -> device_id
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# Useful when routing events to triggers
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self.devices: dict[int, str] = {}
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self.available = False
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self.signal_state_updated = "_".join((DOMAIN, self.unique_id, "state_updated"))
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# Current values of all characteristics homekit_controller is tracking.
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# Key is a (accessory_id, characteristic_id) tuple.
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self.current_state: dict[tuple[int, int], Any] = {}
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self.pollable_characteristics: list[tuple[int, int]] = []
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# If this is set polling is active and can be disabled by calling
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# this method.
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self._polling_interval_remover: CALLBACK_TYPE | None = None
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self._ble_available_interval_remover: CALLBACK_TYPE | None = None
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# Never allow concurrent polling of the same accessory or bridge
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self._polling_lock = asyncio.Lock()
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self._polling_lock_warned = False
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self._poll_failures = 0
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# This is set to True if we can't rely on serial numbers to be unique
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self.unreliable_serial_numbers = False
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self.watchable_characteristics: list[tuple[int, int]] = []
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@property
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def entity_map(self) -> Accessories:
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"""Return the accessories from the pairing."""
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return self.pairing.accessories_state.accessories
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@property
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def config_num(self) -> int:
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"""Return the config num from the pairing."""
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return self.pairing.accessories_state.config_num
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def add_pollable_characteristics(
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self, characteristics: list[tuple[int, int]]
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) -> None:
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"""Add (aid, iid) pairs that we need to poll."""
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self.pollable_characteristics.extend(characteristics)
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def remove_pollable_characteristics(self, accessory_id: int) -> None:
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"""Remove all pollable characteristics by accessory id."""
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self.pollable_characteristics = [
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char for char in self.pollable_characteristics if char[0] != accessory_id
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]
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async def add_watchable_characteristics(
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self, characteristics: list[tuple[int, int]]
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) -> None:
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"""Add (aid, iid) pairs that we need to poll."""
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self.watchable_characteristics.extend(characteristics)
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await self.pairing.subscribe(characteristics)
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def remove_watchable_characteristics(self, accessory_id: int) -> None:
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"""Remove all pollable characteristics by accessory id."""
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self.watchable_characteristics = [
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char for char in self.watchable_characteristics if char[0] != accessory_id
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]
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@callback
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def async_set_available_state(self, available: bool) -> None:
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"""Mark state of all entities on this connection when it becomes available or unavailable."""
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_LOGGER.debug(
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"Called async_set_available_state with %s for %s", available, self.unique_id
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)
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if self.available == available:
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return
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self.available = available
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async_dispatcher_send(self.hass, self.signal_state_updated)
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async def async_setup(self) -> None:
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"""Prepare to use a paired HomeKit device in Home Assistant."""
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pairing = self.pairing
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transport = pairing.transport
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entry = self.config_entry
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# We need to force an update here to make sure we have
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# the latest values since the async_update we do in
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# async_process_entity_map will no values to poll yet
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# since entities are added via dispatching and then
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# they add the chars they are concerned about in
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# async_added_to_hass which is too late.
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#
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# Ideally we would know which entities we are about to add
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# so we only poll those chars but that is not possible
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# yet.
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try:
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await self.pairing.async_populate_accessories_state(force_update=True)
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except AccessoryNotFoundError:
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if transport != Transport.BLE or not pairing.accessories:
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# BLE devices may sleep and we can't force a connection
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raise
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entry.async_on_unload(pairing.dispatcher_connect(self.process_new_events))
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entry.async_on_unload(
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pairing.dispatcher_connect_config_changed(self.process_config_changed)
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)
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entry.async_on_unload(
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pairing.dispatcher_availability_changed(self.async_set_available_state)
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)
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await self.async_process_entity_map()
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# If everything is up to date, we can create the entities
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# since we know the data is not stale.
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await self.async_add_new_entities()
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self.async_set_available_state(self.pairing.is_available)
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self._polling_interval_remover = async_track_time_interval(
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self.hass, self.async_update, self.pairing.poll_interval
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)
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if transport == Transport.BLE:
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# If we are using BLE, we need to periodically check of the
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# BLE device is available since we won't get callbacks
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# when it goes away since we HomeKit supports disconnected
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# notifications and we cannot treat a disconnect as unavailability.
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self._ble_available_interval_remover = async_track_time_interval(
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self.hass,
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self.async_update_available_state,
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timedelta(seconds=BLE_AVAILABILITY_CHECK_INTERVAL),
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)
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async def async_add_new_entities(self) -> None:
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"""Add new entities to Home Assistant."""
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await self.async_load_platforms()
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self.add_entities()
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def device_info_for_accessory(self, accessory: Accessory) -> DeviceInfo:
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"""Build a DeviceInfo for a given accessory."""
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identifiers = {
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(
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IDENTIFIER_ACCESSORY_ID,
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f"{self.unique_id}:aid:{accessory.aid}",
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)
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}
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if not self.unreliable_serial_numbers:
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identifiers.add((IDENTIFIER_SERIAL_NUMBER, accessory.serial_number))
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device_info = DeviceInfo(
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identifiers=identifiers,
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name=accessory.name,
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manufacturer=accessory.manufacturer,
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model=accessory.model,
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sw_version=accessory.firmware_revision,
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hw_version=accessory.hardware_revision,
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)
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if accessory.aid != 1:
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# Every pairing has an accessory 1
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# It *doesn't* have a via_device, as it is the device we are connecting to
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# Every other accessory should use it as its via device.
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device_info[ATTR_VIA_DEVICE] = (
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IDENTIFIER_ACCESSORY_ID,
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f"{self.unique_id}:aid:1",
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)
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return device_info
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@callback
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def async_migrate_devices(self) -> None:
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"""Migrate legacy device entries from 3-tuples to 2-tuples."""
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_LOGGER.debug(
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"Migrating device registry entries for pairing %s", self.unique_id
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)
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device_registry = dr.async_get(self.hass)
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for accessory in self.entity_map.accessories:
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identifiers = {
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(
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DOMAIN,
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IDENTIFIER_LEGACY_ACCESSORY_ID,
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f"{self.unique_id}_{accessory.aid}",
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),
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}
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if accessory.aid == 1:
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identifiers.add(
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(DOMAIN, IDENTIFIER_LEGACY_ACCESSORY_ID, self.unique_id)
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)
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if valid_serial_number(accessory.serial_number):
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identifiers.add(
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(DOMAIN, IDENTIFIER_LEGACY_SERIAL_NUMBER, accessory.serial_number)
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)
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device = device_registry.async_get_device(identifiers=identifiers) # type: ignore[arg-type]
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if not device:
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continue
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if self.config_entry.entry_id not in device.config_entries:
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_LOGGER.info(
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"Found candidate device for %s:aid:%s, but owned by a different config entry, skipping",
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self.unique_id,
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accessory.aid,
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)
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continue
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_LOGGER.info(
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"Migrating device identifiers for %s:aid:%s",
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self.unique_id,
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accessory.aid,
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)
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new_identifiers = {
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(
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IDENTIFIER_ACCESSORY_ID,
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f"{self.unique_id}:aid:{accessory.aid}",
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)
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}
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if not self.unreliable_serial_numbers:
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new_identifiers.add((IDENTIFIER_SERIAL_NUMBER, accessory.serial_number))
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else:
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_LOGGER.debug(
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"Not migrating serial number identifier for %s:aid:%s (it is wrong, not unique or unreliable)",
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self.unique_id,
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accessory.aid,
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)
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device_registry.async_update_device(
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device.id, new_identifiers=new_identifiers
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)
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@callback
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def async_create_devices(self) -> None:
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"""
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Build device registry entries for all accessories paired with the bridge.
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This is done as well as by the entities for 2 reasons. First, the bridge
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might not have any entities attached to it. Secondly there are stateless
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entities like doorbells and remote controls.
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"""
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device_registry = dr.async_get(self.hass)
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devices = {}
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# Accessories need to be created in the correct order or setting up
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# relationships with ATTR_VIA_DEVICE may fail.
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for accessory in sorted(
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self.entity_map.accessories, key=lambda accessory: accessory.aid
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):
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device_info = self.device_info_for_accessory(accessory)
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device = device_registry.async_get_or_create(
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config_entry_id=self.config_entry.entry_id,
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**device_info,
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)
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devices[accessory.aid] = device.id
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self.devices = devices
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@callback
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def async_detect_workarounds(self) -> None:
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"""Detect any workarounds that are needed for this pairing."""
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unreliable_serial_numbers = False
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devices = set()
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for accessory in self.entity_map.accessories:
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if not valid_serial_number(accessory.serial_number):
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_LOGGER.debug(
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"Serial number %r is not valid, it cannot be used as a unique identifier",
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accessory.serial_number,
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)
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unreliable_serial_numbers = True
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elif accessory.serial_number in devices:
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_LOGGER.debug(
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"Serial number %r is duplicated within this pairing, it cannot be used as a unique identifier",
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accessory.serial_number,
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)
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unreliable_serial_numbers = True
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elif accessory.serial_number == accessory.hardware_revision:
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# This is a known bug with some devices (e.g. RYSE SmartShades)
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_LOGGER.debug(
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"Serial number %r is actually the hardware revision, it cannot be used as a unique identifier",
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accessory.serial_number,
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)
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unreliable_serial_numbers = True
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devices.add(accessory.serial_number)
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self.unreliable_serial_numbers = unreliable_serial_numbers
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async def async_process_entity_map(self) -> None:
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"""
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Process the entity map and load any platforms or entities that need adding.
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This is idempotent and will be called at startup and when we detect metadata changes
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via the c# counter on the zeroconf record.
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"""
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# Ensure the Pairing object has access to the latest version of the entity map. This
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# is especially important for BLE, as the Pairing instance relies on the entity map
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# to map aid/iid to GATT characteristics. So push it to there as well.
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self.async_detect_workarounds()
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# Migrate to new device ids
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self.async_migrate_devices()
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self.async_create_devices()
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# Load any triggers for this config entry
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await async_setup_triggers_for_entry(self.hass, self.config_entry)
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async def async_unload(self) -> None:
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"""Stop interacting with device and prepare for removal from hass."""
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if self._polling_interval_remover:
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self._polling_interval_remover()
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await self.pairing.shutdown()
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await self.hass.config_entries.async_unload_platforms(
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self.config_entry, self.platforms
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)
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def process_config_changed(self, config_num: int) -> None:
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"""Handle a config change notification from the pairing."""
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self.hass.async_create_task(self.async_update_new_accessories_state())
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async def async_update_new_accessories_state(self) -> None:
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"""Process a change in the pairings accessories state."""
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await self.async_process_entity_map()
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if self.watchable_characteristics:
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await self.pairing.subscribe(self.watchable_characteristics)
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await self.async_update()
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await self.async_add_new_entities()
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def add_accessory_factory(self, add_entities_cb) -> None:
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"""Add a callback to run when discovering new entities for accessories."""
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self.accessory_factories.append(add_entities_cb)
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self._add_new_entities_for_accessory([add_entities_cb])
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def _add_new_entities_for_accessory(self, handlers) -> None:
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for accessory in self.entity_map.accessories:
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for handler in handlers:
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if (accessory.aid, None, None) in self.entities:
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continue
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if handler(accessory):
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self.entities.append((accessory.aid, None, None))
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break
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def add_char_factory(self, add_entities_cb) -> None:
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"""Add a callback to run when discovering new entities for accessories."""
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self.char_factories.append(add_entities_cb)
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self._add_new_entities_for_char([add_entities_cb])
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def _add_new_entities_for_char(self, handlers) -> None:
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for accessory in self.entity_map.accessories:
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for service in accessory.services:
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for char in service.characteristics:
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for handler in handlers:
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if (accessory.aid, service.iid, char.iid) in self.entities:
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continue
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if handler(char):
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self.entities.append((accessory.aid, service.iid, char.iid))
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break
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def add_listener(self, add_entities_cb) -> None:
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"""Add a callback to run when discovering new entities for services."""
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self.listeners.append(add_entities_cb)
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self._add_new_entities([add_entities_cb])
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def add_entities(self) -> None:
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"""Process the entity map and create HA entities."""
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self._add_new_entities(self.listeners)
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self._add_new_entities_for_accessory(self.accessory_factories)
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self._add_new_entities_for_char(self.char_factories)
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def _add_new_entities(self, callbacks) -> None:
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for accessory in self.entity_map.accessories:
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aid = accessory.aid
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for service in accessory.services:
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iid = service.iid
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if (aid, None, iid) in self.entities:
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# Don't add the same entity again
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continue
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for listener in callbacks:
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if listener(service):
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self.entities.append((aid, None, iid))
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break
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async def async_load_platform(self, platform: str) -> None:
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"""Load a single platform idempotently."""
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if platform in self.platforms:
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return
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self.platforms.add(platform)
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try:
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await self.hass.config_entries.async_forward_entry_setup(
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self.config_entry, platform
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|
)
|
|
except Exception:
|
|
self.platforms.remove(platform)
|
|
raise
|
|
|
|
async def async_load_platforms(self) -> None:
|
|
"""Load any platforms needed by this HomeKit device."""
|
|
tasks = []
|
|
for accessory in self.entity_map.accessories:
|
|
for service in accessory.services:
|
|
if service.type in HOMEKIT_ACCESSORY_DISPATCH:
|
|
platform = HOMEKIT_ACCESSORY_DISPATCH[service.type]
|
|
if platform not in self.platforms:
|
|
tasks.append(self.async_load_platform(platform))
|
|
|
|
for char in service.characteristics:
|
|
if char.type in CHARACTERISTIC_PLATFORMS:
|
|
platform = CHARACTERISTIC_PLATFORMS[char.type]
|
|
if platform not in self.platforms:
|
|
tasks.append(self.async_load_platform(platform))
|
|
|
|
if tasks:
|
|
await asyncio.gather(*tasks)
|
|
|
|
@callback
|
|
def async_update_available_state(self, *_: Any) -> None:
|
|
"""Update the available state of the device."""
|
|
self.async_set_available_state(self.pairing.is_available)
|
|
|
|
async def async_update(self, now=None):
|
|
"""Poll state of all entities attached to this bridge/accessory."""
|
|
if not self.pollable_characteristics:
|
|
self.async_update_available_state()
|
|
_LOGGER.debug(
|
|
"HomeKit connection not polling any characteristics: %s", self.unique_id
|
|
)
|
|
return
|
|
|
|
if self._polling_lock.locked():
|
|
if not self._polling_lock_warned:
|
|
_LOGGER.warning(
|
|
"HomeKit controller update skipped as previous poll still in flight: %s",
|
|
self.unique_id,
|
|
)
|
|
self._polling_lock_warned = True
|
|
return
|
|
|
|
if self._polling_lock_warned:
|
|
_LOGGER.info(
|
|
"HomeKit controller no longer detecting back pressure - not skipping poll: %s",
|
|
self.unique_id,
|
|
)
|
|
self._polling_lock_warned = False
|
|
|
|
async with self._polling_lock:
|
|
_LOGGER.debug("Starting HomeKit controller update: %s", self.unique_id)
|
|
|
|
try:
|
|
new_values_dict = await self.get_characteristics(
|
|
self.pollable_characteristics
|
|
)
|
|
except AccessoryNotFoundError:
|
|
# Not only did the connection fail, but also the accessory is not
|
|
# visible on the network.
|
|
self.async_set_available_state(False)
|
|
return
|
|
except (AccessoryDisconnectedError, EncryptionError):
|
|
# Temporary connection failure. Device may still available but our
|
|
# connection was dropped or we are reconnecting
|
|
self._poll_failures += 1
|
|
if self._poll_failures >= MAX_POLL_FAILURES_TO_DECLARE_UNAVAILABLE:
|
|
self.async_set_available_state(False)
|
|
return
|
|
|
|
self._poll_failures = 0
|
|
self.process_new_events(new_values_dict)
|
|
|
|
_LOGGER.debug("Finished HomeKit controller update: %s", self.unique_id)
|
|
|
|
def process_new_events(self, new_values_dict) -> None:
|
|
"""Process events from accessory into HA state."""
|
|
self.async_set_available_state(True)
|
|
|
|
# Process any stateless events (via device_triggers)
|
|
async_fire_triggers(self, new_values_dict)
|
|
|
|
for (aid, cid), value in new_values_dict.items():
|
|
accessory = self.current_state.setdefault(aid, {})
|
|
accessory[cid] = value
|
|
|
|
# self.current_state will be replaced by entity_map in a future PR
|
|
# For now we update both
|
|
self.entity_map.process_changes(new_values_dict)
|
|
|
|
async_dispatcher_send(self.hass, self.signal_state_updated)
|
|
|
|
async def get_characteristics(self, *args, **kwargs) -> dict[str, Any]:
|
|
"""Read latest state from homekit accessory."""
|
|
return await self.pairing.get_characteristics(*args, **kwargs)
|
|
|
|
async def put_characteristics(self, characteristics) -> None:
|
|
"""Control a HomeKit device state from Home Assistant."""
|
|
results = await self.pairing.put_characteristics(characteristics)
|
|
|
|
# Feed characteristics back into HA and update the current state
|
|
# results will only contain failures, so anythin in characteristics
|
|
# but not in results was applied successfully - we can just have HA
|
|
# reflect the change immediately.
|
|
|
|
new_entity_state = {}
|
|
for aid, iid, value in characteristics:
|
|
key = (aid, iid)
|
|
|
|
# If the key was returned by put_characteristics() then the
|
|
# change didn't work
|
|
if key in results:
|
|
continue
|
|
|
|
# Otherwise it was accepted and we can apply the change to
|
|
# our state
|
|
new_entity_state[key] = {"value": value}
|
|
|
|
self.process_new_events(new_entity_state)
|
|
|
|
@property
|
|
def unique_id(self) -> str:
|
|
"""
|
|
Return a unique id for this accessory or bridge.
|
|
|
|
This id is random and will change if a device undergoes a hard reset.
|
|
"""
|
|
return self.pairing_data["AccessoryPairingID"]
|