Add scene.create service (#28300)

* Initial commit

* Fix scene.create

homeassistant/components/homeassistant/scene.py

@@ -54,6 +54,8 @@ def _convert_states(states):
     return result
 
 
+CONF_SCENE_ID = "scene_id"
+
 STATES_SCHEMA = vol.All(dict, _convert_states)
 
 PLATFORM_SCHEMA = vol.Schema(
@@ -72,7 +74,12 @@ PLATFORM_SCHEMA = vol.Schema(
     extra=vol.ALLOW_EXTRA,
 )
 
+CREATE_SCENE_SCHEMA = vol.Schema(
+    {vol.Required(CONF_SCENE_ID): cv.slug, vol.Required(CONF_ENTITIES): STATES_SCHEMA}
+)
+
 SERVICE_APPLY = "apply"
+SERVICE_CREATE = "create"
 SCENECONFIG = namedtuple("SceneConfig", [CONF_NAME, STATES])
 _LOGGER = logging.getLogger(__name__)
 
@@ -129,6 +136,20 @@ async def async_setup_platform(hass, config, async_add_entities, discovery_info=
         vol.Schema({vol.Required(CONF_ENTITIES): STATES_SCHEMA}),
     )
 
+    async def create_service(call):
+        """Create a scene."""
+        scene_config = SCENECONFIG(call.data[CONF_SCENE_ID], call.data[CONF_ENTITIES])
+        entity_id = f"{SCENE_DOMAIN}.{scene_config.name}"
+        if hass.states.get(entity_id) is not None:
+            _LOGGER.warning("The scene %s already exists", entity_id)
+            return
+
+        async_add_entities([HomeAssistantScene(hass, scene_config)])
+
+    hass.services.async_register(
+        SCENE_DOMAIN, SERVICE_CREATE, create_service, CREATE_SCENE_SCHEMA
+    )
+
 
 def _process_scenes_config(hass, async_add_entities, config):
     """Process multiple scenes and add them."""

homeassistant/components/scene/services.yaml

@@ -20,3 +20,17 @@ apply:
         light.ceiling:
           state: "on"
           brightness: 80
+
+create:
+  description: Creates a new scene.
+  fields:
+    scene_id:
+      description: The entity_id of the new scene.
+      example: all_lights
+    entities:
+      description: The entities to control with the scene.
+      example:
+        light.tv_back_light: "on"
+        light.ceiling:
+          state: "on"
+          brightness: 200

tests/components/homeassistant/test_scene.py

@@ -51,3 +51,42 @@ async def test_apply_service(hass):
     state = hass.states.get("light.bed_light")
     assert state.state == "on"
     assert state.attributes["brightness"] == 50
+
+
+async def test_create_service(hass, caplog):
+    """Test the create service."""
+    assert await async_setup_component(hass, "scene", {})
+    assert hass.states.get("scene.hallo") is None
+
+    assert await hass.services.async_call(
+        "scene",
+        "create",
+        {
+            "scene_id": "hallo",
+            "entities": {"light.bed_light": {"state": "on", "brightness": 50}},
+        },
+        blocking=True,
+    )
+
+    await hass.async_block_till_done()
+    scene = hass.states.get("scene.hallo")
+    assert scene is not None
+    assert scene.domain == "scene"
+    assert scene.name == "hallo"
+    assert scene.state == "scening"
+    assert scene.attributes.get("entity_id") == ["light.bed_light"]
+
+    assert await hass.services.async_call(
+        "scene",
+        "create",
+        {
+            "scene_id": "hallo",
+            "entities": {"light.bed_light": {"state": "on", "brightness": 50}},
+        },
+        blocking=True,
+    )
+
+    await hass.async_block_till_done()
+    assert "The scene scene.hallo already exists" in caplog.text
+    assert hass.states.get("scene.hallo") is not None
+    assert hass.states.get("scene.hallo_2") is None