Add google assistant (#140)

Add an optional extended description…

google_assistant/hassio_gassistant.py

@@ -0,0 +1,26 @@
+"""Hass.IO Google Assistant."""
+import sys
+
+from google.assistant.library import Assistant
+from google.assistant.library.event import EventType
+
+from google.oauth2 import service_account
+
+
+def process_event(event):
+    if event.type == EventType.ON_CONVERSATION_TURN_STARTED:
+        print()
+
+    print(event)
+
+    if (event.type == EventType.ON_CONVERSATION_TURN_FINISHED and event.args and not event.args['with_follow_on_turn']):
+        print()
+
+
+if __name__ == '__main__':
+    credentials = service_account.Credentials.from_service_account_file(sys.argv[1])
+    scoped_credentials = credentials.with_scopes(['https://www.googleapis.com/auth/assistant-sdk-prototype'])
+
+    with Assistant(scoped_credentials) as assistant:
+        for event in assistant.start():
+            process_event(event)