Use templates in service calls

homeassistant/components/automation/__init__.py

@@ -11,13 +11,14 @@ from homeassistant.bootstrap import prepare_setup_platform
 from homeassistant.const import CONF_PLATFORM
 from homeassistant.components import logbook
 from homeassistant.helpers.service import call_from_config
+from homeassistant.helpers.service import validate_service_call
+
 
 DOMAIN = 'automation'
 
 DEPENDENCIES = ['group']
 
 CONF_ALIAS = 'alias'
-CONF_SERVICE = 'service'
 
 CONF_CONDITION = 'condition'
 CONF_ACTION = 'action'
@@ -82,8 +83,9 @@ def _setup_automation(hass, config_block, name, config):
 
 def _get_action(hass, config, name):
     """Return an action based on a configuration."""
-    if CONF_SERVICE not in config:
+    validation_error = validate_service_call(config)
-        _LOGGER.error('Error setting up %s, no action specified.', name)
+    if validation_error:
+        _LOGGER.error(validation_error)
         return None
 
     def action():

homeassistant/helpers/service.py

@@ -3,14 +3,16 @@ import functools
 import logging
 
 from homeassistant.const import ATTR_ENTITY_ID
-from homeassistant.helpers.entity import split_entity_id
+from homeassistant.helpers import template
 from homeassistant.loader import get_component
 
 HASS = None
 
 CONF_SERVICE = 'service'
+CONF_SERVICE_TEMPLATE = 'service_template'
 CONF_SERVICE_ENTITY_ID = 'entity_id'
 CONF_SERVICE_DATA = 'data'
+CONF_SERVICE_DATA_TEMPLATE = 'data_template'
 
 _LOGGER = logging.getLogger(__name__)
 
@@ -29,14 +31,20 @@ def service(domain, service_name):
 
 def call_from_config(hass, config, blocking=False):
     """Call a service based on a config hash."""
-    if not isinstance(config, dict) or CONF_SERVICE not in config:
+    validation_error = validate_service_call(config)
-        _LOGGER.error('Missing key %s: %s', CONF_SERVICE, config)
+    if validation_error:
+        _LOGGER.error(validation_error)
         return
 
+    domain_service = (
+        config[CONF_SERVICE]
+        if CONF_SERVICE in config
+        else template.render(hass, config[CONF_SERVICE_TEMPLATE]))
+
     try:
-        domain, service_name = split_entity_id(config[CONF_SERVICE])
+        domain, service_name = domain_service.split('.', 1)
     except ValueError:
-        _LOGGER.error('Invalid service specified: %s', config[CONF_SERVICE])
+        _LOGGER.error('Invalid service specified: %s', domain_service)
         return
 
     service_data = config.get(CONF_SERVICE_DATA)
@@ -49,6 +57,13 @@ def call_from_config(hass, config, blocking=False):
         _LOGGER.error("%s should be a dictionary", CONF_SERVICE_DATA)
         service_data = {}
 
+    service_data_template = config.get(CONF_SERVICE_DATA_TEMPLATE)
+    if service_data_template and isinstance(service_data_template, dict):
+        for key, value in service_data_template.items():
+            service_data[key] = template.render(hass, value)
+    elif service_data_template:
+        _LOGGER.error("%s should be a dictionary", CONF_SERVICE_DATA)
+
     entity_id = config.get(CONF_SERVICE_ENTITY_ID)
     if isinstance(entity_id, str):
         service_data[ATTR_ENTITY_ID] = [ent.strip() for ent in
@@ -76,3 +91,19 @@ def extract_entity_ids(hass, service_call):
         return group.expand_entity_ids(hass, [service_ent_id])
 
     return [ent_id for ent_id in group.expand_entity_ids(hass, service_ent_id)]
+
+
+def validate_service_call(config):
+    """Validate service call configuration.
+
+    Helper method to validate that a configuration is a valid service call.
+    Returns None if validation succeeds, else an error description
+    """
+    if not isinstance(config, dict):
+        return 'Invalid configuration {}'.format(config)
+    if CONF_SERVICE not in config and CONF_SERVICE_TEMPLATE not in config:
+        return 'Missing key {} or {}: {}'.format(
+            CONF_SERVICE,
+            CONF_SERVICE_TEMPLATE,
+            config)
+    return None

tests/helpers/test_service.py

@@ -39,6 +39,25 @@ class TestServiceHelpers(unittest.TestCase):
         self.hass.pool.block_till_done()
         self.assertEqual(1, len(runs))
 
+    def test_template_service_call(self):
+        """ Test service call with tempating. """
+        config = {
+            'service_template': '{{ \'test_domain.test_service\' }}',
+            'entity_id': 'hello.world',
+            'data_template': {
+                'hello': '{{ \'goodbye\' }}',
+            },
+        }
+        runs = []
+
+        decor = service.service('test_domain', 'test_service')
+        decor(lambda x, y: runs.append(y))
+
+        service.call_from_config(self.hass, config)
+        self.hass.pool.block_till_done()
+
+        self.assertEqual('goodbye', runs[0].data['hello'])
+
     def test_split_entity_string(self):
         service.call_from_config(self.hass, {
             'service': 'test_domain.test_service',
@@ -99,3 +118,21 @@ class TestServiceHelpers(unittest.TestCase):
 
         self.assertEqual(['light.ceiling', 'light.kitchen'],
                          service.extract_entity_ids(self.hass, call))
+
+    def test_validate_service_call(self):
+        """Test is_valid_service_call method"""
+        self.assertNotEqual(
+            service.validate_service_call(
+                {}),
+            None
+            )
+        self.assertEqual(
+            service.validate_service_call(
+                {'service': 'test_domain.test_service'}),
+            None
+            )
+        self.assertEqual(
+            service.validate_service_call(
+                {'service_template': 'test_domain.{{ \'test_service\' }}'}),
+            None
+            )