baseimage-tutorial-framework/lib/tfw/message_sender.py

import json
from datetime import datetime

from .networking.server_connector import ServerUplinkConnector


class MessageSender:
    def __init__(self, custom_anchor=None):
        self.server_connector = ServerUplinkConnector()
        if isinstance(custom_anchor, str):
            custom_anchor = custom_anchor.encode('utf-8')
        self.anchor = custom_anchor or b'message'

    def send(self, originator, message):
        response = {
            'originator': originator,
            'timestamp': datetime.now().isoformat(),
            'message': message
        }
        encoded_response = json.dumps(response).encode('utf-8')
        self.server_connector.send(self.anchor, encoded_response)