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