Add a basic conversation component

homeassistant/components/conversation.py

@@ -0,0 +1,71 @@
+"""
+homeassistant.components.conversation
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+Provides functionality to have conversations with Home Assistant.
+This is more a proof of concept.
+"""
+import logging
+import re
+
+import homeassistant
+from homeassistant.const import (
+    ATTR_FRIENDLY_NAME, ATTR_ENTITY_ID, SERVICE_TURN_ON, SERVICE_TURN_OFF)
+
+DOMAIN = "conversation"
+DEPENDENCIES = []
+
+SERVICE_PROCESS = "process"
+
+ATTR_TEXT = "text"
+
+REGEX_TURN_COMMAND = re.compile(r'turn (?P<name>(?: |\w)+) (?P<command>\w+)')
+
+
+def setup(hass, config):
+    """ Registers the process service. """
+    logger = logging.getLogger(__name__)
+
+    def process(service):
+        if ATTR_TEXT not in service.data:
+            logger.error("Received process service call without a text")
+            return
+
+        text = service.data[ATTR_TEXT].lower()
+
+        match = REGEX_TURN_COMMAND.match(text)
+
+        if not match:
+            logger.error("Unable to process: %s", text)
+            return
+
+        name, command = match.groups()
+
+        entity_ids = [
+            state.entity_id for state in hass.states.all()
+            if state.attributes.get(ATTR_FRIENDLY_NAME, "").lower() == name]
+
+        if not entity_ids:
+            logger.error(
+                "Could not find entity id %s from text %s", name, text)
+            return
+
+        if command == 'on':
+            hass.services.call(
+                homeassistant.DOMAIN, SERVICE_TURN_ON, {
+                    ATTR_ENTITY_ID: entity_ids,
+                }, blocking=True)
+
+        elif command == 'off':
+            hass.services.call(
+                homeassistant.DOMAIN, SERVICE_TURN_OFF, {
+                    ATTR_ENTITY_ID: entity_ids,
+                }, blocking=True)
+
+        else:
+            logger.error(
+                'Got unsupported command %s from text %s', command, text)
+
+    hass.services.register(DOMAIN, SERVICE_PROCESS, process)
+
+    return True