Adds event automation module.

When events are fired with matching data, the automation.event module
executes the corresponding action for automation rules.

homeassistant/components/automation/event.py

@@ -0,0 +1,33 @@
+"""
+homeassistant.components.automation.event
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Offers event listening automation rules.
+"""
+import logging
+import json
+from homeassistant.util import convert
+
+CONF_EVENT_TYPE = "event_type"
+CONF_EVENT_DATA = "event_data"
+
+_LOGGER = logging.getLogger(__name__)
+
+
+def register(hass, config, action):
+    """ Listen for events based on config. """
+    event_type = config.get(CONF_EVENT_TYPE)
+
+    if event_type is None:
+        _LOGGER.error("Missing configuration key %s", CONF_EVENT_TYPE)
+        return False
+
+    event_data = convert(config.get(CONF_EVENT_DATA), json.loads, {})
+
+    def handle_event(event):
+        """ Listens for events and calls the action when data matches. """
+        if event_data == event.data:
+            action()
+
+    hass.bus.listen(event_type, handle_event)
+    return True