forked from platypush/platypush
86 lines
3.1 KiB
Python
86 lines
3.1 KiB
Python
import json
|
|
import os
|
|
import subprocess
|
|
import time
|
|
|
|
import google.oauth2.credentials
|
|
|
|
from google.assistant.library import Assistant
|
|
from google.assistant.library.event import EventType
|
|
from google.assistant.library.file_helpers import existing_file
|
|
|
|
from platypush.backend import Backend
|
|
from platypush.message.event.assistant import \
|
|
ConversationStartEvent, ConversationEndEvent, ConversationTimeoutEvent, \
|
|
NoResponseEvent, SpeechRecognizedEvent
|
|
|
|
|
|
class AssistantGoogleBackend(Backend):
|
|
""" Class for the Google Assistant backend. It creates and event source
|
|
that posts recognized phrases on the main bus """
|
|
|
|
def __init__(self, credentials_file=os.path.join(
|
|
os.path.expanduser('~/.config'),
|
|
'google-oauthlib-tool', 'credentials.json'),
|
|
device_model_id='Platypush', **kwargs):
|
|
""" Params:
|
|
credentials_file -- Path to the Google OAuth credentials file
|
|
(default: ~/.config/google-oauthlib-tool/credentials.json)
|
|
device_model_id -- Device model ID to use for the assistant
|
|
(default: Platypush)
|
|
"""
|
|
|
|
super().__init__(**kwargs)
|
|
self.credentials_file = credentials_file
|
|
self.device_model_id = device_model_id
|
|
self.assistant = None
|
|
|
|
with open(self.credentials_file, 'r') as f:
|
|
self.credentials = google.oauth2.credentials.Credentials(token=None,
|
|
**json.load(f))
|
|
self.logger.info('Initialized Google Assistant backend')
|
|
|
|
def _process_event(self, event):
|
|
self.logger.info('Received assistant event: {}'.format(event))
|
|
|
|
if event.type == EventType.ON_CONVERSATION_TURN_STARTED:
|
|
self.bus.post(ConversationStartEvent())
|
|
elif event.type == EventType.ON_CONVERSATION_TURN_FINISHED:
|
|
self.bus.post(ConversationEndEvent())
|
|
elif event.type == EventType.ON_CONVERSATION_TURN_TIMEOUT:
|
|
self.bus.post(ConversationTimeoutEvent())
|
|
elif event.type == EventType.ON_NO_RESPONSE:
|
|
self.bus.post(NoResponseEvent())
|
|
elif event.type == EventType.ON_RECOGNIZING_SPEECH_FINISHED:
|
|
phrase = event.args['text'].lower().strip()
|
|
self.logger.info('Speech recognized: {}'.format(phrase))
|
|
self.bus.post(SpeechRecognizedEvent(phrase=phrase))
|
|
|
|
|
|
def start_conversation(self):
|
|
if self.assistant: self.assistant.start_conversation()
|
|
|
|
|
|
def stop_conversation(self):
|
|
if self.assistant: self.assistant.stop_conversation()
|
|
|
|
|
|
def send_message(self, msg):
|
|
# Can't send a message on an event source, ignoring
|
|
# TODO Make a class for event sources like these. Event sources
|
|
# would be a subset of the backends which can fire events on the bus
|
|
# but not receive requests or process responses.
|
|
pass
|
|
|
|
def run(self):
|
|
super().run()
|
|
|
|
with Assistant(self.credentials, self.device_model_id) as assistant:
|
|
self.assistant = assistant
|
|
for event in assistant.start():
|
|
self._process_event(event)
|
|
|
|
|
|
# vim:sw=4:ts=4:et:
|
|
|