readme.md

Setup

1. Create a dynamodb table with a "follower" index (numeric)

Operation

1. Create a lambda function

message_followers.py

import twitter
import boto3
import time

dynamodb = boto3.resource('dynamodb')
table = dynamodb.Table('twitter_followers')

api = twitter.Api(
    consumer_key='',
    consumer_secret='',
    access_token_key='',
    access_token_secret=''
)

direct_message = """\
Hello! Thanks for following me! Let me know if I can help you out with anything AWS related. You can shoot me a message at randhunt@amazon.com or on twitter.
"""


def lambda_handler(event, context):
    followers = set(api.GetFollowerIDs())
    ddb_followers = table.scan(ProjectionExpression="follower")["Items"]
    old_followers = set([int(x['follower']) for x in ddb_followers])
    timestamp = int(time.time())

    new_followers = followers - old_followers
    for new_follower in new_followers:
        table.put_item(Item={'follower': new_follower, 'timestamp': timestamp})
        api.PostDirectMessage(direct_message, user_id=new_follower)