Add RestoreEntity to template alarm_control_panel (#125844)

homeassistant/components/template/alarm_control_panel.py

@@ -4,6 +4,7 @@ from __future__ import annotations
 
 from enum import Enum
 import logging
+from typing import Any
 
 import voluptuous as vol
 
@@ -29,12 +30,14 @@ from homeassistant.const import (
     STATE_ALARM_PENDING,
     STATE_ALARM_TRIGGERED,
     STATE_UNAVAILABLE,
+    STATE_UNKNOWN,
 )
 from homeassistant.core import HomeAssistant, callback
 from homeassistant.exceptions import TemplateError
 import homeassistant.helpers.config_validation as cv
 from homeassistant.helpers.entity import async_generate_entity_id
 from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.restore_state import RestoreEntity
 from homeassistant.helpers.script import Script
 from homeassistant.helpers.typing import ConfigType, DiscoveryInfoType
 
@@ -103,7 +106,9 @@ PLATFORM_SCHEMA = ALARM_CONTROL_PANEL_PLATFORM_SCHEMA.extend(
 )
 
 
-async def _async_create_entities(hass, config):
+async def _async_create_entities(
+    hass: HomeAssistant, config: dict[str, Any]
+) -> list[AlarmControlPanelTemplate]:
     """Create Template Alarm Control Panels."""
     alarm_control_panels = []
 
@@ -133,18 +138,18 @@ async def async_setup_platform(
     async_add_entities(await _async_create_entities(hass, config))
 
 
-class AlarmControlPanelTemplate(TemplateEntity, AlarmControlPanelEntity):
+class AlarmControlPanelTemplate(TemplateEntity, AlarmControlPanelEntity, RestoreEntity):
     """Representation of a templated Alarm Control Panel."""
 
     _attr_should_poll = False
 
     def __init__(
         self,
-        hass,
+        hass: HomeAssistant,
-        object_id,
+        object_id: str,
-        config,
+        config: dict,
-        unique_id,
+        unique_id: str | None,
-    ):
+    ) -> None:
         """Initialize the panel."""
         super().__init__(
             hass, config=config, fallback_name=object_id, unique_id=unique_id
@@ -153,6 +158,7 @@ class AlarmControlPanelTemplate(TemplateEntity, AlarmControlPanelEntity):
             ENTITY_ID_FORMAT, object_id, hass=hass
         )
         name = self._attr_name
+        assert name is not None
         self._template = config.get(CONF_VALUE_TEMPLATE)
         self._disarm_script = None
         self._attr_code_arm_required: bool = config[CONF_CODE_ARM_REQUIRED]
@@ -216,6 +222,19 @@ class AlarmControlPanelTemplate(TemplateEntity, AlarmControlPanelEntity):
             )
         self._attr_supported_features = supported_features
 
+    async def async_added_to_hass(self) -> None:
+        """Restore last state."""
+        await super().async_added_to_hass()
+        if (
+            (last_state := await self.async_get_last_state()) is not None
+            and last_state.state not in (STATE_UNKNOWN, STATE_UNAVAILABLE)
+            and last_state.state in _VALID_STATES
+            # The trigger might have fired already while we waited for stored data,
+            # then we should not restore state
+            and self._state is None
+        ):
+            self._state = last_state.state
+
     @property
     def state(self) -> str | None:
         """Return the state of the device."""

tests/components/template/test_alarm_control_panel.py

@@ -17,8 +17,13 @@ from homeassistant.const import (
     STATE_ALARM_DISARMED,
     STATE_ALARM_PENDING,
     STATE_ALARM_TRIGGERED,
+    STATE_UNAVAILABLE,
+    STATE_UNKNOWN,
 )
-from homeassistant.core import Event, HomeAssistant, callback
+from homeassistant.core import Event, HomeAssistant, State, callback
+from homeassistant.setup import async_setup_component
+
+from tests.common import assert_setup_component, mock_restore_cache
 
 TEMPLATE_NAME = "alarm_control_panel.test_template_panel"
 PANEL_NAME = "alarm_control_panel.test"
@@ -400,3 +405,64 @@ async def test_code_config(
     state = hass.states.get(TEMPLATE_NAME)
     assert state.attributes.get("code_format") == code_format
     assert state.attributes.get("code_arm_required") == code_arm_required
+
+
+@pytest.mark.parametrize(("count", "domain"), [(1, "alarm_control_panel")])
+@pytest.mark.parametrize(
+    "config",
+    [
+        {
+            "alarm_control_panel": {
+                "platform": "template",
+                "panels": {"test_template_panel": TEMPLATE_ALARM_CONFIG},
+            }
+        },
+    ],
+)
+@pytest.mark.parametrize(
+    ("restored_state", "initial_state"),
+    [
+        (STATE_ALARM_ARMED_AWAY, STATE_ALARM_ARMED_AWAY),
+        (STATE_ALARM_ARMED_CUSTOM_BYPASS, STATE_ALARM_ARMED_CUSTOM_BYPASS),
+        (STATE_ALARM_ARMED_HOME, STATE_ALARM_ARMED_HOME),
+        (STATE_ALARM_ARMED_NIGHT, STATE_ALARM_ARMED_NIGHT),
+        (STATE_ALARM_ARMED_VACATION, STATE_ALARM_ARMED_VACATION),
+        (STATE_ALARM_ARMING, STATE_ALARM_ARMING),
+        (STATE_ALARM_DISARMED, STATE_ALARM_DISARMED),
+        (STATE_ALARM_PENDING, STATE_ALARM_PENDING),
+        (STATE_ALARM_TRIGGERED, STATE_ALARM_TRIGGERED),
+        (STATE_UNAVAILABLE, STATE_UNKNOWN),
+        (STATE_UNKNOWN, STATE_UNKNOWN),
+        ("faulty_state", STATE_UNKNOWN),
+    ],
+)
+async def test_restore_state(
+    hass: HomeAssistant,
+    count,
+    domain,
+    config,
+    restored_state,
+    initial_state,
+) -> None:
+    """Test restoring template alarm control panel."""
+
+    fake_state = State(
+        "alarm_control_panel.test_template_panel",
+        restored_state,
+        {},
+    )
+    mock_restore_cache(hass, (fake_state,))
+    with assert_setup_component(count, domain):
+        assert await async_setup_component(
+            hass,
+            domain,
+            config,
+        )
+
+        await hass.async_block_till_done()
+
+        await hass.async_start()
+        await hass.async_block_till_done()
+
+    state = hass.states.get("alarm_control_panel.test_template_panel")
+    assert state.state == initial_state