mirror of https://github.com/home-assistant/core
151 lines
5.1 KiB
Python
151 lines
5.1 KiB
Python
"""The bluetooth integration websocket apis."""
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from __future__ import annotations
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from collections.abc import Callable, Iterable
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from functools import lru_cache, partial
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import time
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from typing import Any
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from habluetooth import BluetoothScanningMode
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from home_assistant_bluetooth import BluetoothServiceInfoBleak
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import voluptuous as vol
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from homeassistant.components import websocket_api
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from homeassistant.core import HomeAssistant, callback
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from homeassistant.helpers.json import json_bytes
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from .api import _get_manager, async_register_callback
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from .match import BluetoothCallbackMatcher
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from .models import BluetoothChange
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@callback
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def async_setup(hass: HomeAssistant) -> None:
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"""Set up the bluetooth websocket API."""
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websocket_api.async_register_command(hass, ws_subscribe_advertisements)
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@lru_cache(maxsize=1024)
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def serialize_service_info(
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service_info: BluetoothServiceInfoBleak, time_diff: float
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) -> dict[str, Any]:
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"""Serialize a BluetoothServiceInfoBleak object."""
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return {
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"name": service_info.name,
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"address": service_info.address,
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"rssi": service_info.rssi,
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"manufacturer_data": {
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str(manufacturer_id): manufacturer_data.hex()
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for manufacturer_id, manufacturer_data in service_info.manufacturer_data.items()
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},
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"service_data": {
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service_uuid: service_data.hex()
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for service_uuid, service_data in service_info.service_data.items()
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},
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"service_uuids": service_info.service_uuids,
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"source": service_info.source,
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"connectable": service_info.connectable,
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"time": service_info.time + time_diff,
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"tx_power": service_info.tx_power,
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}
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class _AdvertisementSubscription:
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"""Class to hold and manage the subscription data."""
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def __init__(
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self,
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hass: HomeAssistant,
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connection: websocket_api.ActiveConnection,
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ws_msg_id: int,
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match_dict: BluetoothCallbackMatcher,
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) -> None:
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"""Initialize the subscription data."""
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self.hass = hass
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self.match_dict = match_dict
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self.pending_service_infos: list[BluetoothServiceInfoBleak] = []
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self.ws_msg_id = ws_msg_id
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self.connection = connection
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self.pending = True
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# Keep time_diff precise to 2 decimal places
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# so the cached serialization can be reused,
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# however we still want to calculate it each
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# subscription in case the system clock is wrong
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# and gets corrected.
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self.time_diff = round(time.time() - time.monotonic(), 2)
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@callback
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def _async_unsubscribe(
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self, cancel_callbacks: tuple[Callable[[], None], ...]
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) -> None:
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"""Unsubscribe the callback."""
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for cancel_callback in cancel_callbacks:
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cancel_callback()
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@callback
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def async_start(self) -> None:
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"""Start the subscription."""
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connection = self.connection
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cancel_adv_callback = async_register_callback(
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self.hass,
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self._async_on_advertisement,
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self.match_dict,
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BluetoothScanningMode.PASSIVE,
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)
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cancel_disappeared_callback = _get_manager(
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self.hass
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).async_register_disappeared_callback(self._async_removed)
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connection.subscriptions[self.ws_msg_id] = partial(
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self._async_unsubscribe, (cancel_adv_callback, cancel_disappeared_callback)
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)
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self.pending = False
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self.connection.send_message(
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json_bytes(websocket_api.result_message(self.ws_msg_id))
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)
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self._async_added(self.pending_service_infos)
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self.pending_service_infos.clear()
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def _async_event_message(self, message: dict[str, Any]) -> None:
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self.connection.send_message(
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json_bytes(websocket_api.event_message(self.ws_msg_id, message))
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)
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def _async_added(self, service_infos: Iterable[BluetoothServiceInfoBleak]) -> None:
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self._async_event_message(
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{
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"add": [
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serialize_service_info(service_info, self.time_diff)
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for service_info in service_infos
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]
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}
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)
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def _async_removed(self, address: str) -> None:
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self._async_event_message({"remove": [{"address": address}]})
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@callback
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def _async_on_advertisement(
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self, service_info: BluetoothServiceInfoBleak, change: BluetoothChange
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) -> None:
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"""Handle the callback."""
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if self.pending:
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self.pending_service_infos.append(service_info)
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return
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self._async_added((service_info,))
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@websocket_api.websocket_command(
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{
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vol.Required("type"): "bluetooth/subscribe_advertisements",
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}
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)
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@websocket_api.async_response
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async def ws_subscribe_advertisements(
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hass: HomeAssistant, connection: websocket_api.ActiveConnection, msg: dict[str, Any]
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) -> None:
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"""Handle subscribe advertisements websocket command."""
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_AdvertisementSubscription(
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hass, connection, msg["id"], BluetoothCallbackMatcher(connectable=False)
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).async_start()
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