Add websock command to query device for triggers (#24044)

* Add websock command to query device for triggers

* Lint

* Refactor

* Add support for domain automations

* Make device automation an automation platform

* lint

* Support device_id in light trigger

* Review comments

* Add tests

* Add tests

* lint

CODEOWNERS

@@ -61,6 +61,7 @@ homeassistant/components/daikin/* @fredrike @rofrantz
 homeassistant/components/darksky/* @fabaff
 homeassistant/components/deconz/* @kane610
 homeassistant/components/demo/* @home-assistant/core
+homeassistant/components/device_automation/* @home-assistant/core
 homeassistant/components/digital_ocean/* @fabaff
 homeassistant/components/discogs/* @thibmaek
 homeassistant/components/doorbird/* @oblogic7

homeassistant/components/automation/__init__.py

@@ -50,7 +50,7 @@
 
 
 def _platform_validator(config):
-    """Validate it is a valid  platform."""
+    """Validate it is a valid platform."""
     try:
         platform = importlib.import_module('.{}'.format(config[CONF_PLATFORM]),
                                            __name__)

homeassistant/components/automation/device.py

@@ -0,0 +1,18 @@
+"""Offer device oriented automation."""
+import voluptuous as vol
+
+from homeassistant.const import CONF_DOMAIN, CONF_PLATFORM
+from homeassistant.loader import async_get_integration
+
+
+TRIGGER_SCHEMA = vol.Schema({
+    vol.Required(CONF_PLATFORM): 'device',
+    vol.Required(CONF_DOMAIN): str,
+}, extra=vol.ALLOW_EXTRA)
+
+
+async def async_trigger(hass, config, action, automation_info):
+    """Listen for trigger."""
+    integration = await async_get_integration(hass, config[CONF_DOMAIN])
+    platform = integration.get_platform('device_automation')
+    return await platform.async_trigger(hass, config, action, automation_info)

homeassistant/components/device_automation/__init__.py

@@ -0,0 +1,80 @@
+"""Helpers for device automations."""
+import asyncio
+import logging
+
+import voluptuous as vol
+
+from homeassistant.components import websocket_api
+from homeassistant.core import split_entity_id
+from homeassistant.helpers.entity_registry import async_entries_for_device
+from homeassistant.loader import async_get_integration, IntegrationNotFound
+
+DOMAIN = 'device_automation'
+
+_LOGGER = logging.getLogger(__name__)
+
+
+async def async_setup(hass, config):
+    """Set up device automation."""
+    hass.components.websocket_api.async_register_command(
+        websocket_device_automation_list_triggers)
+    return True
+
+
+async def _async_get_device_automation_triggers(hass, domain, device_id):
+    """List device triggers."""
+    integration = None
+    try:
+        integration = await async_get_integration(hass, domain)
+    except IntegrationNotFound:
+        _LOGGER.warning('Integration %s not found', domain)
+        return None
+
+    try:
+        platform = integration.get_platform('device_automation')
+    except ImportError:
+        # The domain does not have device automations
+        return None
+
+    if hasattr(platform, 'async_get_triggers'):
+        return await platform.async_get_triggers(hass, device_id)
+
+
+async def async_get_device_automation_triggers(hass, device_id):
+    """List device triggers."""
+    device_registry, entity_registry = await asyncio.gather(
+        hass.helpers.device_registry.async_get_registry(),
+        hass.helpers.entity_registry.async_get_registry())
+
+    domains = set()
+    triggers = []
+    device = device_registry.async_get(device_id)
+    for entry_id in device.config_entries:
+        config_entry = hass.config_entries.async_get_entry(entry_id)
+        domains.add(config_entry.domain)
+
+    entities = async_entries_for_device(entity_registry, device_id)
+    for entity in entities:
+        domains.add(split_entity_id(entity.entity_id)[0])
+
+    device_triggers = await asyncio.gather(*[
+        _async_get_device_automation_triggers(hass, domain, device_id)
+        for domain in domains
+    ])
+    for device_trigger in device_triggers:
+        if device_trigger is not None:
+            triggers.extend(device_trigger)
+
+    return triggers
+
+
+@websocket_api.async_response
+@websocket_api.websocket_command({
+    vol.Required('type'): 'device_automation/list_triggers',
+    vol.Required('device_id'): str,
+})
+async def websocket_device_automation_list_triggers(hass, connection, msg):
+    """Handle request for device triggers."""
+    device_id = msg['device_id']
+    triggers = await async_get_device_automation_triggers(hass, device_id)
+    connection.send_result(msg['id'], {'triggers': triggers})

homeassistant/components/device_automation/manifest.json

@@ -0,0 +1,12 @@
+{
+  "domain": "device_automation",
+  "name": "Device automation",
+  "documentation": "https://www.home-assistant.io/components/device_automation",
+  "requirements": [],
+  "dependencies": [
+    "webhook"
+  ],
+  "codeowners": [
+    "@home-assistant/core"
+  ]
+}

homeassistant/components/light/device_automation.py

@@ -0,0 +1,80 @@
+"""Provides device automations for lights."""
+import voluptuous as vol
+
+import homeassistant.components.automation.state as state
+from homeassistant.core import split_entity_id
+from homeassistant.const import (
+    CONF_DEVICE_ID, CONF_DOMAIN, CONF_ENTITY_ID, CONF_PLATFORM, CONF_TYPE)
+import homeassistant.helpers.config_validation as cv
+from homeassistant.helpers.entity_registry import async_entries_for_device
+from . import DOMAIN
+
+CONF_TURN_OFF = 'turn_off'
+CONF_TURN_ON = 'turn_on'
+
+ENTITY_TRIGGERS = [
+    {
+        # Trigger when light is turned on
+        CONF_PLATFORM: 'device',
+        CONF_DOMAIN: DOMAIN,
+        CONF_TYPE: CONF_TURN_OFF,
+    },
+    {
+        # Trigger when light is turned off
+        CONF_PLATFORM: 'device',
+        CONF_DOMAIN: DOMAIN,
+        CONF_TYPE: CONF_TURN_ON,
+    },
+]
+
+TRIGGER_SCHEMA = vol.All(vol.Schema({
+    vol.Required(CONF_PLATFORM): 'device',
+    vol.Optional(CONF_DEVICE_ID): str,
+    vol.Required(CONF_DOMAIN): DOMAIN,
+    vol.Required(CONF_ENTITY_ID): cv.entity_id,
+    vol.Required(CONF_TYPE): str,
+}))
+
+
+def _is_domain(entity, domain):
+    return split_entity_id(entity.entity_id)[0] == domain
+
+
+async def async_attach_trigger(hass, config, action, automation_info):
+    """Listen for state changes based on configuration."""
+    trigger_type = config.get(CONF_TYPE)
+    if trigger_type == CONF_TURN_ON:
+        from_state = 'off'
+        to_state = 'on'
+    else:
+        from_state = 'on'
+        to_state = 'off'
+    state_config = {
+        state.CONF_ENTITY_ID: config[CONF_ENTITY_ID],
+        state.CONF_FROM: from_state,
+        state.CONF_TO: to_state
+    }
+
+    return await state.async_trigger(hass, state_config, action,
+                                     automation_info)
+
+
+async def async_trigger(hass, config, action, automation_info):
+    """Temporary so existing automation framework can be used for testing."""
+    return await async_attach_trigger(hass, config, action, automation_info)
+
+
+async def async_get_triggers(hass, device_id):
+    """List device triggers."""
+    triggers = []
+    entity_registry = await hass.helpers.entity_registry.async_get_registry()
+
+    entities = async_entries_for_device(entity_registry, device_id)
+    domain_entities = [x for x in entities if _is_domain(x, DOMAIN)]
+    for entity in domain_entities:
+        for trigger in ENTITY_TRIGGERS:
+            trigger = dict(trigger)
+            trigger.update(device_id=device_id, entity_id=entity.entity_id)
+            triggers.append(trigger)
+
+    return triggers

homeassistant/const.py

@@ -59,6 +59,7 @@
 CONF_DELAY_TIME = 'delay_time'
 CONF_DEVICE = 'device'
 CONF_DEVICE_CLASS = 'device_class'
+CONF_DEVICE_ID = 'device_id'
 CONF_DEVICES = 'devices'
 CONF_DISARM_AFTER_TRIGGER = 'disarm_after_trigger'
 CONF_DISCOVERY = 'discovery'

tests/components/device_automation/test_init.py

@@ -0,0 +1,67 @@
+"""The test for light device automation."""
+import pytest
+
+from homeassistant.setup import async_setup_component
+from homeassistant.components.websocket_api.const import TYPE_RESULT
+from homeassistant.helpers import device_registry
+
+
+from tests.common import (
+    MockConfigEntry, mock_device_registry, mock_registry)
+
+
+@pytest.fixture
+def device_reg(hass):
+    """Return an empty, loaded, registry."""
+    return mock_device_registry(hass)
+
+
+@pytest.fixture
+def entity_reg(hass):
+    """Return an empty, loaded, registry."""
+    return mock_registry(hass)
+
+
+def _same_triggers(a, b):
+    if len(a) != len(b):
+        return False
+
+    for d in a:
+        if d not in b:
+            return False
+    return True
+
+
+async def test_websocket_get_triggers(
+        hass, hass_ws_client, device_reg, entity_reg):
+    """Test we get the expected triggers from a light through websocket."""
+    await async_setup_component(hass, 'device_automation', {})
+    config_entry = MockConfigEntry(domain='test', data={})
+    config_entry.add_to_hass(hass)
+    device_entry = device_reg.async_get_or_create(
+        config_entry_id=config_entry.entry_id,
+        connections={
+            (device_registry.CONNECTION_NETWORK_MAC, '12:34:56:AB:CD:EF')
+        })
+    entity_reg.async_get_or_create(
+        'light', 'test', '5678', device_id=device_entry.id)
+    expected_triggers = [
+      {'platform': 'device', 'domain': 'light', 'type': 'turn_off',
+       'device_id': device_entry.id, 'entity_id': 'light.test_5678'},
+      {'platform': 'device', 'domain': 'light', 'type': 'turn_on',
+       'device_id': device_entry.id, 'entity_id': 'light.test_5678'},
+    ]
+
+    client = await hass_ws_client(hass)
+    await client.send_json({
+        'id': 1,
+        'type': 'device_automation/list_triggers',
+        'device_id': device_entry.id
+    })
+    msg = await client.receive_json()
+
+    assert msg['id'] == 1
+    assert msg['type'] == TYPE_RESULT
+    assert msg['success']
+    triggers = msg['result']['triggers']
+    assert _same_triggers(triggers, expected_triggers)