Add input_datetime reload service. (#29581)

* Add input_datetime reload service.

* Add reload service test.

homeassistant/components/input_datetime/__init__.py

@@ -1,16 +1,22 @@
 """Support to select a date and/or a time."""
-import logging
 import datetime
+import logging
 
 import voluptuous as vol
 
-from homeassistant.const import ATTR_DATE, ATTR_TIME, CONF_ICON, CONF_NAME
+from homeassistant.const import (
+    ATTR_DATE,
+    ATTR_TIME,
+    CONF_ICON,
+    CONF_NAME,
+    SERVICE_RELOAD,
+)
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity_component import EntityComponent
 from homeassistant.helpers.restore_state import RestoreEntity
+import homeassistant.helpers.service
 from homeassistant.util import dt as dt_util
 
-
 _LOGGER = logging.getLogger(__name__)
 
 DOMAIN = "input_datetime"
@@ -52,27 +58,32 @@ CONFIG_SCHEMA = vol.Schema(
     },
     extra=vol.ALLOW_EXTRA,
 )
+RELOAD_SERVICE_SCHEMA = vol.Schema({})
 
 
 async def async_setup(hass, config):
     """Set up an input datetime."""
     component = EntityComponent(_LOGGER, DOMAIN, hass)
 
-    entities = []
+    entities = await _async_process_config(config)
 
-    for object_id, cfg in config[DOMAIN].items():
+    async def reload_service_handler(service_call):
-        name = cfg.get(CONF_NAME)
+        """Remove all entities and load new ones from config."""
-        has_time = cfg.get(CONF_HAS_TIME)
+        conf = await component.async_prepare_reload()
-        has_date = cfg.get(CONF_HAS_DATE)
+        if conf is None:
-        icon = cfg.get(CONF_ICON)
+            return
-        initial = cfg.get(CONF_INITIAL)
+        new_entities = await _async_process_config(conf)
-        entities.append(
+        if new_entities:
-            InputDatetime(object_id, name, has_date, has_time, icon, initial)
+            await component.async_add_entities(new_entities)
+
+    homeassistant.helpers.service.async_register_admin_service(
+        hass,
+        DOMAIN,
+        SERVICE_RELOAD,
+        reload_service_handler,
+        schema=RELOAD_SERVICE_SCHEMA,
     )
 
-    if not entities:
-        return False
-
     async def async_set_datetime_service(entity, call):
         """Handle a call to the input datetime 'set datetime' service."""
         time = call.data.get(ATTR_TIME)
@@ -108,10 +119,28 @@ async def async_setup(hass, config):
         async_set_datetime_service,
     )
 
+    if entities:
         await component.async_add_entities(entities)
     return True
 
 
+async def _async_process_config(config):
+    """Process config and create list of entities."""
+    entities = []
+
+    for object_id, cfg in config[DOMAIN].items():
+        name = cfg.get(CONF_NAME)
+        has_time = cfg.get(CONF_HAS_TIME)
+        has_date = cfg.get(CONF_HAS_DATE)
+        icon = cfg.get(CONF_ICON)
+        initial = cfg.get(CONF_INITIAL)
+        entities.append(
+            InputDatetime(object_id, name, has_date, has_time, icon, initial)
+        )
+
+    return entities
+
+
 class InputDatetime(RestoreEntity):
     """Representation of a datetime input."""
 

homeassistant/components/input_datetime/services.yaml

@@ -9,3 +9,6 @@ set_datetime:
       example: '"time": "05:30:00"'}
     datetime: {description: The target date & time the entity should be set to. Do not use with date or time.,
       example: '"datetime": "2019-04-22 05:30:00"'}
+
+reload:
+  description: Reload the input_datetime configuration.

tests/components/input_datetime/test_init.py

@@ -2,20 +2,23 @@
 # pylint: disable=protected-access
 import asyncio
 import datetime
+from unittest.mock import patch
 
 import pytest
 import voluptuous as vol
 
-from homeassistant.core import CoreState, State, Context
-from homeassistant.setup import async_setup_component
 from homeassistant.components.input_datetime import (
-    DOMAIN,
     ATTR_DATE,
     ATTR_DATETIME,
     ATTR_TIME,
+    DOMAIN,
+    SERVICE_RELOAD,
     SERVICE_SET_DATETIME,
 )
 from homeassistant.const import ATTR_ENTITY_ID
+from homeassistant.core import Context, CoreState, State
+from homeassistant.exceptions import Unauthorized
+from homeassistant.setup import async_setup_component
 
 from tests.common import mock_restore_cache
 
@@ -310,3 +313,65 @@ async def test_input_datetime_context(hass, hass_admin_user):
     assert state2 is not None
     assert state.state != state2.state
     assert state2.context.user_id == hass_admin_user.id
+
+
+async def test_reload(hass, hass_admin_user, hass_read_only_user):
+    """Test reload service."""
+    count_start = len(hass.states.async_entity_ids())
+
+    assert await async_setup_component(
+        hass,
+        DOMAIN,
+        {
+            DOMAIN: {
+                "dt1": {"has_time": False, "has_date": True, "initial": "2019-1-1"},
+            }
+        },
+    )
+
+    assert count_start + 1 == len(hass.states.async_entity_ids())
+
+    state_1 = hass.states.get("input_datetime.dt1")
+    state_2 = hass.states.get("input_datetime.dt2")
+
+    dt_obj = datetime.datetime(2019, 1, 1, 0, 0)
+    assert state_1 is not None
+    assert state_2 is None
+    assert str(dt_obj.date()) == state_1.state
+
+    with patch(
+        "homeassistant.config.load_yaml_config_file",
+        autospec=True,
+        return_value={
+            DOMAIN: {
+                "dt1": {"has_time": True, "has_date": False, "initial": "23:32"},
+                "dt2": {"has_time": True, "has_date": True},
+            }
+        },
+    ):
+        with patch("homeassistant.config.find_config_file", return_value=""):
+            with pytest.raises(Unauthorized):
+                await hass.services.async_call(
+                    DOMAIN,
+                    SERVICE_RELOAD,
+                    blocking=True,
+                    context=Context(user_id=hass_read_only_user.id),
+                )
+            await hass.services.async_call(
+                DOMAIN,
+                SERVICE_RELOAD,
+                blocking=True,
+                context=Context(user_id=hass_admin_user.id),
+            )
+            await hass.async_block_till_done()
+
+    assert count_start + 2 == len(hass.states.async_entity_ids())
+
+    state_1 = hass.states.get("input_datetime.dt1")
+    state_2 = hass.states.get("input_datetime.dt2")
+
+    dt_obj = datetime.datetime(2019, 1, 1, 23, 32)
+    assert state_1 is not None
+    assert state_2 is not None
+    assert str(dt_obj.time()) == state_1.state
+    assert str(datetime.datetime(1970, 1, 1, 0, 0)) == state_2.state