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iot.py
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iot.py
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"""Module to handle messages from Home Assistant cloud."""
from __future__ import annotations
import asyncio
from contextlib import suppress
import logging
import pprint
import random
from typing import TYPE_CHECKING, Any
import uuid
from . import iot_base
from .utils import Registry
if TYPE_CHECKING:
from . import Cloud, _ClientT
HANDLERS = Registry()
_LOGGER = logging.getLogger(__name__)
class UnknownHandler(Exception):
"""Exception raised when trying to handle unknown handler."""
class ErrorMessage(Exception):
"""Exception raised when there was error handling message in the cloud."""
def __init__(self, error: Any) -> None:
"""Initialize Error Message."""
super().__init__("Error in Cloud")
self.error = error
class HandlerError(Exception):
"""Exception raised when the handler failed."""
def __init__(self, error: str) -> None:
"""Initialize Error Message."""
super().__init__("Error in handler")
self.error = error
class CloudIoT(iot_base.BaseIoT):
"""Class to manage the IoT connection."""
mark_connected_after_first_message: bool = True
def __init__(self, cloud: Cloud[_ClientT]) -> None:
"""Initialize the CloudIoT class."""
super().__init__(cloud)
# Local code waiting for a response
self._response_handler: dict[str, asyncio.Future[Any]] = {}
# Register start/stop
cloud.register_on_start(self.start)
cloud.register_on_stop(self.disconnect)
@property
def package_name(self) -> str:
"""Return the package name for logging."""
return __name__
@property
def ws_heartbeat(self) -> float | None:
"""Server to connect to."""
return 300
@property
def ws_server_url(self) -> str:
"""Server to connect to."""
return f"wss://{self.cloud.relayer_server}/websocket"
async def start(self) -> None:
"""Start the CloudIoT server."""
if self.cloud.subscription_expired:
return
asyncio.create_task(self.connect())
async def async_send_message(
self,
handler: str,
payload: Any,
expect_answer: bool = True,
) -> Any | None:
"""Send a message."""
msgid = uuid.uuid4().hex
fut: asyncio.Future[Any] | None = None
if expect_answer:
fut = self._response_handler[msgid] = asyncio.Future()
try:
await self.async_send_json_message(
{"msgid": msgid, "handler": handler, "payload": payload},
)
if expect_answer and fut is not None:
return await fut
return None
finally:
self._response_handler.pop(msgid, None)
def async_handle_message(self, msg: dict[str, Any]) -> None:
"""Handle a message."""
response_handler = self._response_handler.get(msg["msgid"])
if response_handler is not None:
if "payload" in msg:
response_handler.set_result(msg["payload"])
else:
response_handler.set_exception(ErrorMessage(msg["error"]))
return
asyncio.create_task(self._async_handle_handler_message(msg))
async def _async_handle_handler_message(self, message: dict[str, Any]) -> None:
"""Handle incoming IoT message."""
response = {"msgid": message["msgid"]}
try:
handler = HANDLERS.get(message["handler"])
if handler is None:
raise UnknownHandler
result = await handler(self.cloud, message.get("payload"))
# No response from handler
if result is None:
return
response["payload"] = result
except UnknownHandler:
response["error"] = "unknown-handler"
except HandlerError as err:
self._logger.warning("Error handling message: %s", err.error)
response["error"] = err.error
except Exception: # pylint: disable=broad-except
self._logger.exception("Error handling message")
response["error"] = "exception"
# Client is unset in case the connection has been lost.
if self.client is None:
return
if self._logger.isEnabledFor(logging.DEBUG):
self._logger.debug("Publishing message:\n%s\n", pprint.pformat(response))
# Suppress when client is closing.
with suppress(ConnectionResetError):
await self.client.send_json(response)
async def _connected(self) -> None:
"""Handle connected."""
await super()._connected()
await self.cloud.client.cloud_connected()
async def _disconnected(self) -> None:
"""Handle connected."""
await super()._disconnected()
await self.cloud.client.cloud_disconnected()
@HANDLERS.register("system")
async def async_handle_system(cloud: Cloud[_ClientT], payload: dict[str, Any]) -> None:
"""Handle an incoming IoT message for System."""
return await cloud.client.async_system_message(payload)
@HANDLERS.register("alexa")
async def async_handle_alexa(
cloud: Cloud[_ClientT],
payload: dict[str, Any],
) -> dict[str, Any]:
"""Handle an incoming IoT message for Alexa."""
return await cloud.client.async_alexa_message(payload)
@HANDLERS.register("google_actions")
async def async_handle_google_actions(
cloud: Cloud[_ClientT],
payload: dict[str, Any],
) -> dict[str, Any]:
"""Handle an incoming IoT message for Google Actions."""
return await cloud.client.async_google_message(payload)
@HANDLERS.register("cloud")
async def async_handle_cloud(cloud: Cloud[_ClientT], payload: dict[str, Any]) -> None:
"""Handle an incoming IoT message for cloud component."""
action = payload["action"]
if action == "logout":
# Log out of Home Assistant Cloud
await cloud.logout()
_LOGGER.error(
"You have been logged out from Home Assistant cloud: %s",
payload["reason"],
)
elif action == "disconnect_remote":
# Disconnect Remote connection
await cloud.remote.disconnect(clear_snitun_token=True)
elif action == "evaluate_remote_security":
async def _reconnect() -> None:
"""Reconnect after a random timeout."""
await asyncio.sleep(random.randint(60, 7200))
await cloud.remote.disconnect(clear_snitun_token=True)
await cloud.remote.connect()
# Reconnect to remote frontends
cloud.client.loop.create_task(_reconnect())
elif action in ("user_notification", "critical_user_notification"):
# Send user Notification
cloud.client.user_message(
"homeassistant_cloud_notification",
payload["title"],
payload["message"],
)
else:
_LOGGER.warning("Received unknown cloud action: %s", action)
@HANDLERS.register("remote_sni")
async def async_handle_remote_sni(
cloud: Cloud[_ClientT],
payload: dict[str, Any], # noqa: ARG001
) -> dict[str, Any]:
"""Handle remote UI requests for cloud."""
await cloud.client.async_cloud_connect_update(True)
return {"server": cloud.remote.snitun_server}
@HANDLERS.register("connection_info")
async def async_handle_connection_info(
cloud: Cloud[_ClientT],
payload: dict[str, Any],
) -> dict[str, Any]:
"""Handle connection info requests for cloud."""
return await cloud.client.async_cloud_connection_info(payload)
@HANDLERS.register("webhook")
async def async_handle_webhook(
cloud: Cloud[_ClientT],
payload: dict[str, Any],
) -> dict[str, Any]:
"""Handle an incoming IoT message for cloud webhooks."""
return await cloud.client.async_webhook_message(payload)