Remember gpslogger entities across restarts (fixes #24432) (#24444)

* Remember gpslogger entities across restarts (fixes #24432)

* oops, missed those changes

* Remove to do and set defaults to `None`

homeassistant/components/gpslogger/__init__.py

@@ -11,19 +11,21 @@ from homeassistant.const import HTTP_UNPROCESSABLE_ENTITY, \
 from homeassistant.helpers import config_entry_flow
 from homeassistant.helpers.dispatcher import async_dispatcher_send
 from homeassistant.components.device_tracker import DOMAIN as DEVICE_TRACKER
-from .const import DOMAIN
+from .const import (
+    DOMAIN,
+    ATTR_ALTITUDE,
+    ATTR_ACCURACY,
+    ATTR_ACTIVITY,
+    ATTR_DEVICE,
+    ATTR_DIRECTION,
+    ATTR_PROVIDER,
+    ATTR_SPEED,
+)
 
 _LOGGER = logging.getLogger(__name__)
 
 TRACKER_UPDATE = '{}_tracker_update'.format(DOMAIN)
 
-ATTR_ALTITUDE = 'altitude'
-ATTR_ACCURACY = 'accuracy'
-ATTR_ACTIVITY = 'activity'
-ATTR_DEVICE = 'device'
-ATTR_DIRECTION = 'direction'
-ATTR_PROVIDER = 'provider'
-ATTR_SPEED = 'speed'
 
 DEFAULT_ACCURACY = 200
 DEFAULT_BATTERY = -1

homeassistant/components/gpslogger/const.py

@@ -1,3 +1,11 @@
 """Const for GPSLogger."""
 
 DOMAIN = 'gpslogger'
+
+ATTR_ALTITUDE = 'altitude'
+ATTR_ACCURACY = 'accuracy'
+ATTR_ACTIVITY = 'activity'
+ATTR_DEVICE = 'device'
+ATTR_DIRECTION = 'direction'
+ATTR_PROVIDER = 'provider'
+ATTR_SPEED = 'speed'

homeassistant/components/gpslogger/device_tracker.py

@@ -2,14 +2,29 @@
 import logging
 
 from homeassistant.core import callback
+from homeassistant.const import (
+    ATTR_BATTERY_LEVEL,
+    ATTR_GPS_ACCURACY,
+    ATTR_LATITUDE,
+    ATTR_LONGITUDE,
+)
 from homeassistant.components.device_tracker import SOURCE_TYPE_GPS
 from homeassistant.components.device_tracker.config_entry import (
     DeviceTrackerEntity
 )
+from homeassistant.helpers import device_registry
 from homeassistant.helpers.dispatcher import async_dispatcher_connect
+from homeassistant.helpers.restore_state import RestoreEntity
 from homeassistant.helpers.typing import HomeAssistantType
 
 from . import DOMAIN as GPL_DOMAIN, TRACKER_UPDATE
+from .const import (
+    ATTR_ACTIVITY,
+    ATTR_ALTITUDE,
+    ATTR_DIRECTION,
+    ATTR_PROVIDER,
+    ATTR_SPEED,
+)
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -32,8 +47,27 @@ async def async_setup_entry(hass: HomeAssistantType, entry,
     hass.data[GPL_DOMAIN]['unsub_device_tracker'][entry.entry_id] = \
         async_dispatcher_connect(hass, TRACKER_UPDATE, _receive_data)
 
+    # Restore previously loaded devices
+    dev_reg = await device_registry.async_get_registry(hass)
+    dev_ids = {
+        identifier[1]
+        for device in dev_reg.devices.values()
+        for identifier in device.identifiers
+        if identifier[0] == GPL_DOMAIN
+    }
+    if not dev_ids:
+        return
 
-class GPSLoggerEntity(DeviceTrackerEntity):
+    entities = []
+    for dev_id in dev_ids:
+        hass.data[GPL_DOMAIN]['devices'].add(dev_id)
+        entity = GPSLoggerEntity(dev_id, None, None, None, None)
+        entities.append(entity)
+
+    async_add_entities(entities)
+
+
+class GPSLoggerEntity(DeviceTrackerEntity, RestoreEntity):
     """Represent a tracked device."""
 
     def __init__(
@@ -102,11 +136,46 @@ class GPSLoggerEntity(DeviceTrackerEntity):
 
     async def async_added_to_hass(self):
         """Register state update callback."""
+        await super().async_added_to_hass()
         self._unsub_dispatcher = async_dispatcher_connect(
             self.hass, TRACKER_UPDATE, self._async_receive_data)
 
+        # don't restore if we got created with data
+        if self._location is not None:
+            return
+
+        state = await self.async_get_last_state()
+        if state is None:
+            self._location = (None, None)
+            self._accuracy = None
+            self._attributes = {
+                ATTR_ALTITUDE: None,
+                ATTR_ACTIVITY: None,
+                ATTR_DIRECTION: None,
+                ATTR_PROVIDER: None,
+                ATTR_SPEED: None,
+            }
+            self._battery = None
+            return
+
+        attr = state.attributes
+        self._location = (
+            attr.get(ATTR_LATITUDE),
+            attr.get(ATTR_LONGITUDE),
+        )
+        self._accuracy = attr.get(ATTR_GPS_ACCURACY)
+        self._attributes = {
+            ATTR_ALTITUDE: attr.get(ATTR_ALTITUDE),
+            ATTR_ACTIVITY: attr.get(ATTR_ACTIVITY),
+            ATTR_DIRECTION: attr.get(ATTR_DIRECTION),
+            ATTR_PROVIDER: attr.get(ATTR_PROVIDER),
+            ATTR_SPEED: attr.get(ATTR_SPEED),
+        }
+        self._battery = attr.get(ATTR_BATTERY_LEVEL)
+
     async def async_will_remove_from_hass(self):
         """Clean up after entity before removal."""
+        await super().async_will_remove_from_hass()
         self._unsub_dispatcher()
 
     @callback