Use eventing for some of the upnp sensors, instead of polling (#120262)

homeassistant/components/upnp/coordinator.py

@@ -1,5 +1,7 @@
 """UPnP/IGD coordinator."""
 
+from collections import defaultdict
+from collections.abc import Callable
 from datetime import datetime, timedelta
 
 from async_upnp_client.exceptions import UpnpCommunicationError
@@ -27,6 +29,7 @@ class UpnpDataUpdateCoordinator(
         """Initialize."""
         self.device = device
         self.device_entry = device_entry
+        self._features_by_entity_id: defaultdict[str, set[str]] = defaultdict(set)
 
         super().__init__(
             hass,
@@ -35,12 +38,35 @@ class UpnpDataUpdateCoordinator(
             update_interval=update_interval,
         )
 
+    def register_entity(self, key: str, entity_id: str) -> Callable[[], None]:
+        """Register an entity."""
+        # self._entities.append(entity)
+        self._features_by_entity_id[key].add(entity_id)
+
+        def unregister_entity() -> None:
+            """Unregister entity."""
+            self._features_by_entity_id[key].remove(entity_id)
+
+            if not self._features_by_entity_id[key]:
+                del self._features_by_entity_id[key]
+
+        return unregister_entity
+
+    @property
+    def _entity_description_keys(self) -> list[str] | None:
+        """Return a list of entity description keys for which data is required."""
+        if not self._features_by_entity_id:
+            # Must be the first update, no entities attached/enabled yet.
+            return None
+
+        return list(self._features_by_entity_id.keys())
+
     async def _async_update_data(
         self,
     ) -> dict[str, str | datetime | int | float | None]:
         """Update data."""
         try:
-            return await self.device.async_get_data()
+            return await self.device.async_get_data(self._entity_description_keys)
         except UpnpCommunicationError as exception:
             LOGGER.debug(
                 "Caught exception when updating device: %s, exception: %s",