Make helpers.condition.* async

homeassistant/helpers/condition.py

@@ -20,15 +20,43 @@ import homeassistant.util.dt as dt_util
 from homeassistant.util.async import run_callback_threadsafe
 
 FROM_CONFIG_FORMAT = '{}_from_config'
+ASYNC_FROM_CONFIG_FORMAT = 'async_{}_from_config'
 
 _LOGGER = logging.getLogger(__name__)
 
+# PyLint does not like the use of _threaded_factory
+# pylint: disable=invalid-name
 
-def from_config(config: ConfigType, config_validation: bool=True):
-    """Turn a condition configuration into a method."""
-    factory = getattr(
-        sys.modules[__name__],
-        FROM_CONFIG_FORMAT.format(config.get(CONF_CONDITION)), None)
+
+def _threaded_factory(async_factory):
+    """Helper method to create threaded versions of async factories."""
+    def factory(config, config_validation=True):
+        """Threaded factory."""
+        async_check = async_factory(config, config_validation)
+
+        def condition_if(hass, variables=None):
+            """Validate condition."""
+            return run_callback_threadsafe(
+                hass.loop, async_check, hass, variables,
+            ).result()
+
+        return condition_if
+
+    return factory
+
+
+def async_from_config(config: ConfigType, config_validation: bool=True):
+    """Turn a condition configuration into a method.
+
+    Should be run on the event loop.
+    """
+    for fmt in (ASYNC_FROM_CONFIG_FORMAT, FROM_CONFIG_FORMAT):
+        factory = getattr(
+            sys.modules[__name__],
+            fmt.format(config.get(CONF_CONDITION)), None)
+
+        if factory:
+            break
 
     if factory is None:
         raise HomeAssistantError('Invalid condition "{}" specified {}'.format(
@@ -37,49 +65,70 @@ def from_config(config: ConfigType, config_validation: bool=True):
     return factory(config, config_validation)
 
 
-def and_from_config(config: ConfigType, config_validation: bool=True):
+from_config = _threaded_factory(async_from_config)
+
+
+def async_and_from_config(config: ConfigType, config_validation: bool=True):
     """Create multi condition matcher using 'AND'."""
     if config_validation:
         config = cv.AND_CONDITION_SCHEMA(config)
-    checks = [from_config(entry, False) for entry in config['conditions']]
+    checks = None
 
     def if_and_condition(hass: HomeAssistant,
                          variables=None) -> bool:
         """Test and condition."""
-        for check in checks:
-            try:
+        nonlocal checks
+
+        if checks is None:
+            checks = [async_from_config(entry, False) for entry
+                      in config['conditions']]
+
+        try:
+            for check in checks:
                 if not check(hass, variables):
                     return False
-            except Exception as ex:  # pylint: disable=broad-except
-                _LOGGER.warning('Error during and-condition: %s', ex)
-                return False
+        except Exception as ex:  # pylint: disable=broad-except
+            _LOGGER.warning('Error during and-condition: %s', ex)
+            return False
 
         return True
 
     return if_and_condition
 
 
-def or_from_config(config: ConfigType, config_validation: bool=True):
+and_from_config = _threaded_factory(async_and_from_config)
+
+
+def async_or_from_config(config: ConfigType, config_validation: bool=True):
     """Create multi condition matcher using 'OR'."""
     if config_validation:
         config = cv.OR_CONDITION_SCHEMA(config)
-    checks = [from_config(entry, False) for entry in config['conditions']]
+    checks = None
 
     def if_or_condition(hass: HomeAssistant,
                         variables=None) -> bool:
         """Test and condition."""
-        for check in checks:
-            try:
+        nonlocal checks
+
+        if checks is None:
+            checks = [async_from_config(entry, False) for entry
+                      in config['conditions']]
+
+        try:
+            for check in checks:
                 if check(hass, variables):
                     return True
-            except Exception as ex:  # pylint: disable=broad-except
-                _LOGGER.warning('Error during or-condition: %s', ex)
+        except Exception as ex:  # pylint: disable=broad-except
+            _LOGGER.warning('Error during or-condition: %s', ex)
 
         return False
 
     return if_or_condition
 
 
+or_from_config = _threaded_factory(async_or_from_config)
+
+
 # pylint: disable=too-many-arguments
 def numeric_state(hass: HomeAssistant, entity, below=None, above=None,
                   value_template=None, variables=None):
@@ -125,7 +174,7 @@ def async_numeric_state(hass: HomeAssistant, entity, below=None, above=None,
     return True
 
 
-def numeric_state_from_config(config, config_validation=True):
+def async_numeric_state_from_config(config, config_validation=True):
     """Wrap action method with state based condition."""
     if config_validation:
         config = cv.NUMERIC_STATE_CONDITION_SCHEMA(config)
@@ -139,12 +188,15 @@ def numeric_state_from_config(config, config_validation=True):
         if value_template is not None:
             value_template.hass = hass
 
-        return numeric_state(hass, entity_id, below, above, value_template,
-                             variables)
+        return async_numeric_state(
+            hass, entity_id, below, above, value_template, variables)
 
     return if_numeric_state
 
 
+numeric_state_from_config = _threaded_factory(async_numeric_state_from_config)
+
+
 def state(hass, entity, req_state, for_period=None):
     """Test if state matches requirements."""
     if isinstance(entity, str):
@@ -235,7 +287,7 @@ def async_template(hass, value_template, variables=None):
     return value.lower() == 'true'
 
 
-def template_from_config(config, config_validation=True):
+def async_template_from_config(config, config_validation=True):
     """Wrap action method with state based condition."""
     if config_validation:
         config = cv.TEMPLATE_CONDITION_SCHEMA(config)
@@ -245,11 +297,14 @@ def template_from_config(config, config_validation=True):
         """Validate template based if-condition."""
         value_template.hass = hass
 
-        return template(hass, value_template, variables)
+        return async_template(hass, value_template, variables)
 
     return template_if
 
 
+template_from_config = _threaded_factory(async_template_from_config)
+
+
 def time(before=None, after=None, weekday=None):
     """Test if local time condition matches.