Clean up device registry if entity registry updates (#35106)

homeassistant/helpers/debounce.py

@@ -21,7 +21,7 @@ class Debouncer:
         """Initialize debounce.
 
         immediate: indicate if the function needs to be called right away and
-                   wait 0.3s until executing next invocation.
+                   wait <cooldown> until executing next invocation.
         function: optional and can be instantiated later.
         """
         self.hass = hass

homeassistant/helpers/device_registry.py

@@ -1,16 +1,21 @@
 """Provide a way to connect entities belonging to one device."""
 from collections import OrderedDict
 import logging
-from typing import Any, Dict, List, Optional, Set, Tuple
+from typing import TYPE_CHECKING, Any, Dict, List, Optional, Set, Tuple
 import uuid
 
 import attr
 
-from homeassistant.core import callback
+from homeassistant.const import EVENT_HOMEASSISTANT_STARTED
+from homeassistant.core import Event, callback
 
+from .debounce import Debouncer
 from .singleton import singleton
 from .typing import HomeAssistantType
 
+if TYPE_CHECKING:
+    from . import entity_registry
+
 # mypy: allow-untyped-calls, allow-untyped-defs, no-check-untyped-defs
 
 _LOGGER = logging.getLogger(__name__)
@@ -21,6 +26,7 @@ EVENT_DEVICE_REGISTRY_UPDATED = "device_registry_updated"
 STORAGE_KEY = "core.device_registry"
 STORAGE_VERSION = 1
 SAVE_DELAY = 10
+CLEANUP_DELAY = 10
 
 CONNECTION_NETWORK_MAC = "mac"
 CONNECTION_UPNP = "upnp"
@@ -285,6 +291,8 @@ class DeviceRegistry:
 
     async def async_load(self):
         """Load the device registry."""
+        async_setup_cleanup(self.hass, self)
+
         data = await self._store.async_load()
 
         devices = OrderedDict()
@@ -347,16 +355,8 @@ class DeviceRegistry:
     @callback
     def async_clear_config_entry(self, config_entry_id: str) -> None:
         """Clear config entry from registry entries."""
-        remove = []
-        for dev_id, device in self.devices.items():
-            if device.config_entries == {config_entry_id}:
-                remove.append(dev_id)
-            else:
-                self._async_update_device(
-                    dev_id, remove_config_entry_id=config_entry_id
-                )
-        for dev_id in remove:
-            self.async_remove_device(dev_id)
+        for device in list(self.devices.values()):
+            self._async_update_device(device.id, remove_config_entry_id=config_entry_id)
 
     @callback
     def async_clear_area_id(self, area_id: str) -> None:
@@ -390,3 +390,69 @@ def async_entries_for_config_entry(
         for device in registry.devices.values()
         if config_entry_id in device.config_entries
     ]
+
+
+@callback
+def async_cleanup(
+    hass: HomeAssistantType,
+    dev_reg: DeviceRegistry,
+    ent_reg: "entity_registry.EntityRegistry",
+) -> None:
+    """Clean up device registry."""
+    # Find all devices that are no longer referenced in the entity registry.
+    referenced = {entry.device_id for entry in ent_reg.entities.values()}
+    orphan = set(dev_reg.devices) - referenced
+
+    for dev_id in orphan:
+        dev_reg.async_remove_device(dev_id)
+
+    # Find all referenced config entries that no longer exist
+    # This shouldn't happen but have not been able to track down the bug :(
+    config_entry_ids = {entry.entry_id for entry in hass.config_entries.async_entries()}
+
+    for device in list(dev_reg.devices.values()):
+        for config_entry_id in device.config_entries:
+            if config_entry_id not in config_entry_ids:
+                dev_reg.async_update_device(
+                    device.id, remove_config_entry_id=config_entry_id
+                )
+
+
+@callback
+def async_setup_cleanup(hass: HomeAssistantType, dev_reg: DeviceRegistry) -> None:
+    """Clean up device registry when entities removed."""
+    from . import entity_registry  # pylint: disable=import-outside-toplevel
+
+    async def cleanup():
+        """Cleanup."""
+        ent_reg = await entity_registry.async_get_registry(hass)
+        async_cleanup(hass, dev_reg, ent_reg)
+
+    debounced_cleanup = Debouncer(
+        hass, _LOGGER, cooldown=CLEANUP_DELAY, immediate=False, function=cleanup
+    )
+
+    async def entity_registry_changed(event: Event) -> None:
+        """Handle entity updated or removed."""
+        if (
+            event.data["action"] == "update"
+            and "device_id" not in event.data["changes"]
+        ) or event.data["action"] == "create":
+            return
+
+        await debounced_cleanup.async_call()
+
+    if hass.is_running:
+        hass.bus.async_listen(
+            entity_registry.EVENT_ENTITY_REGISTRY_UPDATED, entity_registry_changed
+        )
+        return
+
+    async def startup_clean(event: Event) -> None:
+        """Clean up on startup."""
+        hass.bus.async_listen(
+            entity_registry.EVENT_ENTITY_REGISTRY_UPDATED, entity_registry_changed
+        )
+        await debounced_cleanup.async_call()
+
+    hass.bus.async_listen_once(EVENT_HOMEASSISTANT_STARTED, startup_clean)

tests/helpers/test_device_registry.py

@@ -3,12 +3,12 @@ import asyncio
 
 import pytest
 
-from homeassistant.core import callback
-from homeassistant.helpers import device_registry
+from homeassistant.const import EVENT_HOMEASSISTANT_STARTED
+from homeassistant.core import CoreState, callback
+from homeassistant.helpers import device_registry, entity_registry
 
-import tests.async_mock
 from tests.async_mock import patch
-from tests.common import flush_store, mock_device_registry
+from tests.common import MockConfigEntry, flush_store, mock_device_registry
 
 
 @pytest.fixture
@@ -483,7 +483,7 @@ async def test_update_remove_config_entries(hass, registry, update_events):
 
 async def test_loading_race_condition(hass):
     """Test only one storage load called when concurrent loading occurred ."""
-    with tests.async_mock.patch(
+    with patch(
         "homeassistant.helpers.device_registry.DeviceRegistry.async_load"
     ) as mock_load:
         results = await asyncio.gather(
@@ -511,3 +511,76 @@ async def test_update_sw_version(registry):
     assert mock_save.call_count == 1
     assert updated_entry != entry
     assert updated_entry.sw_version == sw_version
+
+
+async def test_cleanup_device_registry(hass, registry):
+    """Test cleanup works."""
+    config_entry = MockConfigEntry(domain="hue")
+    config_entry.add_to_hass(hass)
+
+    d1 = registry.async_get_or_create(
+        identifiers={("hue", "d1")}, config_entry_id=config_entry.entry_id
+    )
+    registry.async_get_or_create(
+        identifiers={("hue", "d2")}, config_entry_id=config_entry.entry_id
+    )
+    d3 = registry.async_get_or_create(
+        identifiers={("hue", "d3")}, config_entry_id=config_entry.entry_id
+    )
+    registry.async_get_or_create(
+        identifiers={("something", "d4")}, config_entry_id="non_existing"
+    )
+
+    ent_reg = await entity_registry.async_get_registry(hass)
+    ent_reg.async_get_or_create("light", "hue", "e1", device_id=d1.id)
+    ent_reg.async_get_or_create("light", "hue", "e2", device_id=d1.id)
+    ent_reg.async_get_or_create("light", "hue", "e3", device_id=d3.id)
+
+    device_registry.async_cleanup(hass, registry, ent_reg)
+
+    assert registry.async_get_device({("hue", "d1")}, set()) is not None
+    assert registry.async_get_device({("hue", "d2")}, set()) is None
+    assert registry.async_get_device({("hue", "d3")}, set()) is not None
+    assert registry.async_get_device({("something", "d4")}, set()) is None
+
+
+async def test_cleanup_startup(hass):
+    """Test we run a cleanup on startup."""
+    hass.state = CoreState.not_running
+    await device_registry.async_get_registry(hass)
+
+    with patch(
+        "homeassistant.helpers.device_registry.Debouncer.async_call"
+    ) as mock_call:
+        hass.bus.async_fire(EVENT_HOMEASSISTANT_STARTED)
+        await hass.async_block_till_done()
+
+    assert len(mock_call.mock_calls) == 1
+
+
+async def test_cleanup_entity_registry_change(hass):
+    """Test we run a cleanup when entity registry changes."""
+    await device_registry.async_get_registry(hass)
+    ent_reg = await entity_registry.async_get_registry(hass)
+
+    with patch(
+        "homeassistant.helpers.device_registry.Debouncer.async_call"
+    ) as mock_call:
+        entity = ent_reg.async_get_or_create("light", "hue", "e1")
+        await hass.async_block_till_done()
+        assert len(mock_call.mock_calls) == 0
+
+        # Normal update does not trigger
+        ent_reg.async_update_entity(entity.entity_id, name="updated")
+        await hass.async_block_till_done()
+        assert len(mock_call.mock_calls) == 0
+
+        # Device ID update triggers
+        ent_reg.async_get_or_create("light", "hue", "e1", device_id="bla")
+        await hass.async_block_till_done()
+        assert len(mock_call.mock_calls) == 1
+
+        # Removal also triggers
+        ent_reg.async_remove(entity.entity_id)
+        await hass.async_block_till_done()
+        assert len(mock_call.mock_calls) == 2