Load/unload gpslogger entities correctly between component and platfo…

…rm (home-assistant#20448)

* Embed device_tracker in gpslogger

* Load/unload gpslogger entities correctly between component and platform

* Await the coroutine directly

homeassistant/components/gpslogger/__init__.py

@@ -15,8 +15,8 @@
 from homeassistant.const import HTTP_UNPROCESSABLE_ENTITY, \
     HTTP_OK, ATTR_LATITUDE, ATTR_LONGITUDE, CONF_WEBHOOK_ID
 from homeassistant.helpers import config_entry_flow
-from homeassistant.helpers.discovery import async_load_platform
 from homeassistant.helpers.dispatcher import async_dispatcher_send
+from homeassistant.components.device_tracker import DOMAIN as DEVICE_TRACKER
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -57,9 +57,6 @@ def _id(value: str) -> str:
 
 async def async_setup(hass, hass_config):
     """Set up the GPSLogger component."""
-    hass.async_create_task(
-        async_load_platform(hass, 'device_tracker', DOMAIN, {}, hass_config)
-    )
     return True
 
 
@@ -103,12 +100,18 @@ async def async_setup_entry(hass, entry):
     """Configure based on config entry."""
     hass.components.webhook.async_register(
         DOMAIN, 'GPSLogger', entry.data[CONF_WEBHOOK_ID], handle_webhook)
+
+    hass.async_create_task(
+        hass.config_entries.async_forward_entry_setup(entry, DEVICE_TRACKER)
+    )
     return True
 
 
 async def async_unload_entry(hass, entry):
     """Unload a config entry."""
     hass.components.webhook.async_unregister(entry.data[CONF_WEBHOOK_ID])
+
+    await hass.config_entries.async_forward_entry_unload(entry, DEVICE_TRACKER)
     return True
 
 config_entry_flow.register_webhook_flow(

homeassistant/components/gpslogger/device_tracker.py

@@ -0,0 +1,44 @@
+"""
+Support for the GPSLogger platform.
+
+For more details about this platform, please refer to the documentation at
+https://home-assistant.io/components/device_tracker.gpslogger/
+"""
+import logging
+
+from homeassistant.components.device_tracker import DOMAIN as \
+    DEVICE_TRACKER_DOMAIN
+from homeassistant.components.gpslogger import DOMAIN as GPSLOGGER_DOMAIN, \
+    TRACKER_UPDATE
+from homeassistant.helpers.dispatcher import async_dispatcher_connect
+from homeassistant.helpers.typing import HomeAssistantType
+
+_LOGGER = logging.getLogger(__name__)
+
+DEPENDENCIES = ['gpslogger']
+
+DATA_KEY = '{}.{}'.format(GPSLOGGER_DOMAIN, DEVICE_TRACKER_DOMAIN)
+
+
+async def async_setup_entry(hass: HomeAssistantType, entry, async_see):
+    """Configure a dispatcher connection based on a config entry."""
+    async def _set_location(device, gps_location, battery, accuracy, attrs):
+        """Fire HA event to set location."""
+        await async_see(
+            dev_id=device,
+            gps=gps_location,
+            battery=battery,
+            gps_accuracy=accuracy,
+            attributes=attrs
+        )
+
+    hass.data[DATA_KEY] = async_dispatcher_connect(
+        hass, TRACKER_UPDATE, _set_location
+    )
+    return True
+
+
+async def async_unload_entry(hass: HomeAssistantType, entry):
+    """Unload the config entry and remove the dispatcher connection."""
+    hass.data[DATA_KEY]()
+    return True

tests/components/gpslogger/test_init.py

@@ -2,15 +2,17 @@
 from unittest.mock import patch, Mock
 
 import pytest
+from homeassistant.helpers.dispatcher import DATA_DISPATCHER
 
 from homeassistant import data_entry_flow
-from homeassistant.components import zone
+from homeassistant.components import zone, gpslogger
 from homeassistant.components.device_tracker import \
     DOMAIN as DEVICE_TRACKER_DOMAIN
-from homeassistant.components.gpslogger import DOMAIN
+from homeassistant.components.gpslogger import DOMAIN, TRACKER_UPDATE
 from homeassistant.const import HTTP_OK, HTTP_UNPROCESSABLE_ENTITY, \
-    STATE_HOME, STATE_NOT_HOME
+    STATE_HOME, STATE_NOT_HOME, CONF_WEBHOOK_ID
 from homeassistant.setup import async_setup_component
+from tests.common import MockConfigEntry
 
 HOME_LATITUDE = 37.239622
 HOME_LONGITUDE = -115.815811
@@ -164,3 +166,21 @@ async def test_enter_with_attrs(hass, gpslogger_client, webhook_id):
     assert 102.0 == state.attributes['altitude']
     assert 'gps' == state.attributes['provider']
     assert 'running' == state.attributes['activity']
+
+
+@pytest.mark.xfail(
+    reason='The device_tracker component does not support unloading yet.'
+)
+async def test_load_unload_entry(hass):
+    """Test that the appropriate dispatch signals are added and removed."""
+    entry = MockConfigEntry(domain=DOMAIN, data={
+        CONF_WEBHOOK_ID: 'gpslogger_test'
+    })
+
+    await gpslogger.async_setup_entry(hass, entry)
+    await hass.async_block_till_done()
+    assert 1 == len(hass.data[DATA_DISPATCHER][TRACKER_UPDATE])
+
+    await gpslogger.async_unload_entry(hass, entry)
+    await hass.async_block_till_done()
+    assert 0 == len(hass.data[DATA_DISPATCHER][TRACKER_UPDATE])