Switch to using the get core state api call to check if the API is up (#4445)

Co-authored-by: Joakim Sørensen <joasoe@gmail.com>
Co-authored-by: Franck Nijhof <frenck@frenck.nl>

supervisor/homeassistant/api.py

@@ -7,6 +7,7 @@ from typing import Any, AsyncContextManager
 
 import aiohttp
 from aiohttp import hdrs
+from awesomeversion import AwesomeVersion
 
 from ..coresys import CoreSys, CoreSysAttributes
 from ..exceptions import HomeAssistantAPIError, HomeAssistantAuthError
@@ -17,6 +18,8 @@ from .const import LANDINGPAGE
 
 _LOGGER: logging.Logger = logging.getLogger(__name__)
 
+GET_CORE_STATE_MIN_VERSION: AwesomeVersion = AwesomeVersion("2023.8.0.dev20230720")
+
 
 class HomeAssistantAPI(CoreSysAttributes):
     """Home Assistant core object for handle it."""
@@ -106,15 +109,23 @@ class HomeAssistantAPI(CoreSysAttributes):
 
         raise HomeAssistantAPIError()
 
-    async def get_config(self) -> dict[str, Any]:
+    async def _get_json(self, path: str) -> dict[str, Any]:
-        """Return Home Assistant config."""
+        """Return Home Assistant get API."""
-        async with self.make_request("get", "api/config") as resp:
+        async with self.make_request("get", path) as resp:
             if resp.status in (200, 201):
                 return await resp.json()
             else:
                 _LOGGER.debug("Home Assistant API return: %d", resp.status)
         raise HomeAssistantAPIError()
 
+    async def get_config(self) -> dict[str, Any]:
+        """Return Home Assistant config."""
+        return await self._get_json("api/config")
+
+    async def get_core_state(self) -> dict[str, Any]:
+        """Return Home Assistant core state."""
+        return await self._get_json("api/core/state")
+
     async def check_api_state(self) -> bool:
         """Return True if Home Assistant up and running."""
         # Skip check on landingpage
@@ -134,8 +145,15 @@ class HomeAssistantAPI(CoreSysAttributes):
 
         # Check if API is up
         with suppress(HomeAssistantAPIError):
+            # get_core_state is available since 2023.8.0 and preferred
+            # since it is significantly faster than get_config because
+            # it does not require serializing the entire config
+            if self.sys_homeassistant.version >= GET_CORE_STATE_MIN_VERSION:
+                data = await self.get_core_state()
+            else:
                 data = await self.get_config()
             # Older versions of home assistant does not expose the state
             if data and data.get("state", "RUNNING") == "RUNNING":
                 return True
+
         return False