gatekeeper-event-handler.py

import boto3
import json
import logging
import requests
from datetime import datetime

logger = logging.getLogger()
logger.setLevel(logging.INFO)

def handler(event, context):

    logger.info("Received event: {}".format(json.dumps(event)))

    # Assert required keys exist.
    for key in ['name', 'value', 'source']:
        if key not in event:
            logger.error('The `{}` key was missing from the event.'.format(key))
            raise KeyError(key)

    # Handle GCM notification for handset-activated events.
    if 'name' in event and event['name'] == 'gatekeeper/handset-activated':
        # Publish to SNS
        client = boto3.client('sns')
        client.publish(
            TopicArn = 'arn:aws:sns:eu-west-1:<arn-number>:HandsetActivations',
            Message = json.dumps({
                'default': 'Handset activated!',
                'GCM': '{"data": {"event": "handset-activated"}, "priority": "high", "time_to_live": 120, "collapse_key": "handset-activated" }'
            }),
            MessageStructure = 'json'
        )

    return "Thanks!"