Fire event when core config is updated (#23922)

* Fire event when core config is updated

homeassistant/config.py

@@ -23,14 +23,16 @@ from homeassistant.const import (
     __version__, CONF_CUSTOMIZE, CONF_CUSTOMIZE_DOMAIN, CONF_CUSTOMIZE_GLOB,
     CONF_WHITELIST_EXTERNAL_DIRS, CONF_AUTH_PROVIDERS, CONF_AUTH_MFA_MODULES,
     CONF_TYPE, CONF_ID)
-from homeassistant.core import callback, DOMAIN as CONF_CORE, HomeAssistant
+from homeassistant.core import (
+    DOMAIN as CONF_CORE, SOURCE_DISCOVERED, SOURCE_YAML, HomeAssistant,
+    callback)
 from homeassistant.exceptions import HomeAssistantError
 from homeassistant.loader import (
     Integration, async_get_integration, IntegrationNotFound
 )
 from homeassistant.util.yaml import load_yaml, SECRET_YAML
 import homeassistant.helpers.config_validation as cv
-from homeassistant.util import dt as date_util, location as loc_util
+from homeassistant.util import location as loc_util
 from homeassistant.util.unit_system import IMPERIAL_SYSTEM, METRIC_SYSTEM
 from homeassistant.helpers.entity_values import EntityValues
 from homeassistant.helpers import config_per_platform, extract_domain_configs
@@ -50,13 +52,6 @@ FILE_MIGRATION = (
     ('ios.conf', '.ios.conf'),
 )
 
-CORE_STORAGE_KEY = 'homeassistant.core_config'
-CORE_STORAGE_VERSION = 1
-
-SOURCE_DISCOVERED = 'discovered'
-SOURCE_STORAGE = 'storage'
-SOURCE_YAML = 'yaml'
-
 DEFAULT_CORE_CONFIG = (
     # Tuples (attribute, default, auto detect property, description)
     (CONF_NAME, 'Home', None, 'Name of the location where Home Assistant is '
@@ -478,42 +473,6 @@ def _format_config_error(ex: vol.Invalid, domain: str, config: Dict) -> str:
     return message
 
 
-def _set_time_zone(hass: HomeAssistant, time_zone_str: Optional[str]) -> None:
-    """Help to set the time zone."""
-    if time_zone_str is None:
-        return
-
-    time_zone = date_util.get_time_zone(time_zone_str)
-
-    if time_zone:
-        hass.config.time_zone = time_zone
-        date_util.set_default_time_zone(time_zone)
-    else:
-        _LOGGER.error("Received invalid time zone %s", time_zone_str)
-
-
-async def async_load_ha_core_config(hass: HomeAssistant) -> None:
-    """Store [homeassistant] core config."""
-    store = hass.helpers.storage.Store(CORE_STORAGE_VERSION, CORE_STORAGE_KEY,
-                                       private=True)
-    data = await store.async_load()
-    if not data:
-        return
-
-    hac = hass.config
-    hac.config_source = SOURCE_STORAGE
-    hac.latitude = data['latitude']
-    hac.longitude = data['longitude']
-    hac.elevation = data['elevation']
-    unit_system = data['unit_system']
-    if unit_system == CONF_UNIT_SYSTEM_IMPERIAL:
-        hac.units = IMPERIAL_SYSTEM
-    else:
-        hac.units = METRIC_SYSTEM
-    hac.location_name = data['location_name']
-    _set_time_zone(hass, data['time_zone'])
-
-
 async def async_process_ha_core_config(
         hass: HomeAssistant, config: Dict,
         api_password: Optional[str] = None,
@@ -552,7 +511,7 @@ async def async_process_ha_core_config(
             auth_conf,
             mfa_conf))
 
-    await async_load_ha_core_config(hass)
+    await hass.config.async_load()
 
     hac = hass.config
 
@@ -568,7 +527,8 @@ async def async_process_ha_core_config(
         if key in config:
             setattr(hac, attr, config[key])
 
-    _set_time_zone(hass, config.get(CONF_TIME_ZONE))
+    if CONF_TIME_ZONE in config:
+        hac.set_time_zone(config[CONF_TIME_ZONE])
 
     # Init whitelist external dir
     hac.whitelist_external_dirs = {hass.config.path('www')}
@@ -649,7 +609,7 @@ async def async_process_ha_core_config(
             discovered.append(('name', info.city))
 
         if hac.time_zone is None:
-            _set_time_zone(hass, info.time_zone)
+            hac.set_time_zone(info.time_zone)
             discovered.append(('time_zone', info.time_zone))
 
     if hac.elevation is None and hac.latitude is not None and \
@@ -666,24 +626,6 @@ async def async_process_ha_core_config(
             ", ".join('{}: {}'.format(key, val) for key, val in discovered))
 
 
-async def async_store_ha_core_config(hass: HomeAssistant) -> None:
-    """Store [homeassistant] core config."""
-    config = hass.config.as_dict()
-
-    data = {
-        'latitude': config['latitude'],
-        'longitude': config['longitude'],
-        'elevation': config['elevation'],
-        'unit_system': hass.config.units.name,
-        'location_name': config['location_name'],
-        'time_zone': config['time_zone'],
-    }
-
-    store = hass.helpers.storage.Store(CORE_STORAGE_VERSION, CORE_STORAGE_KEY,
-                                       private=True)
-    await store.async_save(data)
-
-
 def _log_pkg_error(
         package: str, component: str, config: Dict, message: str) -> None:
     """Log an error while merging packages."""