136 lines
4.3 KiB
Python
136 lines
4.3 KiB
Python
"""Implement the services discovery feature from Hass.io for Add-ons."""
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from __future__ import annotations
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import asyncio
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from dataclasses import dataclass
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import logging
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from typing import Any
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from aiohttp import web
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from aiohttp.web_exceptions import HTTPServiceUnavailable
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from homeassistant import config_entries
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from homeassistant.components.http import HomeAssistantView
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from homeassistant.const import ATTR_NAME, ATTR_SERVICE, EVENT_HOMEASSISTANT_START
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from homeassistant.core import HomeAssistant, callback
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from homeassistant.data_entry_flow import BaseServiceInfo
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from homeassistant.helpers import discovery_flow
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from .const import ATTR_ADDON, ATTR_CONFIG, ATTR_DISCOVERY, ATTR_UUID
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from .handler import HassIO, HassioAPIError
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_LOGGER = logging.getLogger(__name__)
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@dataclass(slots=True)
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class HassioServiceInfo(BaseServiceInfo):
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"""Prepared info from hassio entries."""
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config: dict[str, Any]
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name: str
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slug: str
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uuid: str
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@callback
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def async_setup_discovery_view(hass: HomeAssistant, hassio):
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"""Discovery setup."""
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hassio_discovery = HassIODiscovery(hass, hassio)
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hass.http.register_view(hassio_discovery)
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# Handle exists discovery messages
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async def _async_discovery_start_handler(event):
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"""Process all exists discovery on startup."""
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try:
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data = await hassio.retrieve_discovery_messages()
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except HassioAPIError as err:
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_LOGGER.error("Can't read discover info: %s", err)
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return
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jobs = [
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asyncio.create_task(hassio_discovery.async_process_new(discovery))
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for discovery in data[ATTR_DISCOVERY]
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]
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if jobs:
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await asyncio.wait(jobs)
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hass.bus.async_listen_once(
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EVENT_HOMEASSISTANT_START, _async_discovery_start_handler
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)
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class HassIODiscovery(HomeAssistantView):
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"""Hass.io view to handle base part."""
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name = "api:hassio_push:discovery"
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url = "/api/hassio_push/discovery/{uuid}"
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def __init__(self, hass: HomeAssistant, hassio: HassIO) -> None:
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"""Initialize WebView."""
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self.hass = hass
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self.hassio = hassio
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async def post(self, request, uuid):
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"""Handle new discovery requests."""
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# Fetch discovery data and prevent injections
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try:
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data = await self.hassio.get_discovery_message(uuid)
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except HassioAPIError as err:
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_LOGGER.error("Can't read discovery data: %s", err)
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raise HTTPServiceUnavailable() from None
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await self.async_process_new(data)
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return web.Response()
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async def delete(self, request, uuid):
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"""Handle remove discovery requests."""
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data = await request.json()
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await self.async_process_del(data)
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return web.Response()
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async def async_process_new(self, data: dict[str, Any]) -> None:
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"""Process add discovery entry."""
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service: str = data[ATTR_SERVICE]
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config_data: dict[str, Any] = data[ATTR_CONFIG]
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slug: str = data[ATTR_ADDON]
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uuid: str = data[ATTR_UUID]
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# Read additional Add-on info
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try:
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addon_info = await self.hassio.get_addon_info(slug)
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except HassioAPIError as err:
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_LOGGER.error("Can't read add-on info: %s", err)
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return
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name: str = addon_info[ATTR_NAME]
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config_data[ATTR_ADDON] = name
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# Use config flow
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discovery_flow.async_create_flow(
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self.hass,
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service,
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context={"source": config_entries.SOURCE_HASSIO},
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data=HassioServiceInfo(config=config_data, name=name, slug=slug, uuid=uuid),
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)
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async def async_process_del(self, data):
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"""Process remove discovery entry."""
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service = data[ATTR_SERVICE]
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uuid = data[ATTR_UUID]
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# Check if really deletet / prevent injections
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try:
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data = await self.hassio.get_discovery_message(uuid)
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except HassioAPIError:
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pass
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else:
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_LOGGER.warning("Retrieve wrong unload for %s", service)
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return
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# Use config flow
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for entry in self.hass.config_entries.async_entries(service):
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if entry.source != config_entries.SOURCE_HASSIO or entry.unique_id != uuid:
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continue
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await self.hass.config_entries.async_remove(entry.entry_id)
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