Add calling service functionality to Alexa

homeassistant/helpers/service.py

@@ -0,0 +1,37 @@
+"""Service calling related helpers."""
+import logging
+
+from homeassistant.util import split_entity_id
+from homeassistant.const import ATTR_ENTITY_ID
+
+CONF_SERVICE = 'service'
+CONF_SERVICE_ENTITY_ID = 'entity_id'
+CONF_SERVICE_DATA = 'data'
+
+_LOGGER = logging.getLogger(__name__)
+
+
+def call_from_config(hass, config, blocking=False):
+    """Call a service based on a config hash."""
+    if CONF_SERVICE not in config:
+        _LOGGER.error('Missing key %s: %s', CONF_SERVICE, config)
+        return
+
+    domain, service = split_entity_id(config[CONF_SERVICE])
+    service_data = config.get(CONF_SERVICE_DATA)
+
+    if service_data is None:
+        service_data = {}
+    elif isinstance(service_data, dict):
+        service_data = dict(service_data)
+    else:
+        _LOGGER.error("%s should be a dictionary", CONF_SERVICE_DATA)
+        service_data = {}
+
+    entity_id = config.get(CONF_SERVICE_ENTITY_ID)
+    if isinstance(entity_id, str):
+        service_data[ATTR_ENTITY_ID] = entity_id.split(",")
+    elif entity_id is not None:
+        service_data[ATTR_ENTITY_ID] = entity_id
+
+    hass.services.call(domain, service, service_data, blocking)