Murder Mystery Party Bot Emailer

murder_mystery_party_emailer.py

from __future__ import print_function
import pickle
import os.path
import base64
import json
import datetime
import random
from urllib.error import HTTPError
from email.mime.text import MIMEText
from googleapiclient.discovery import build
from google_auth_oauthlib.flow import InstalledAppFlow
from google.auth.transport.requests import Request

# https://realpython.com/python-send-email/#getting-started
# https://developers.google.com/gmail/api/guides/sending
# https://developers.google.com/gmail/api/quickstart/python

# If modifying these scopes, delete the file token.pickle.
SCOPES = ['https://www.googleapis.com/auth/gmail.send']

# You need to have a `data.json` file that's a JSON object of Names to their emails.

def login():
    """
    Makes the gmail client object to use
    """
    creds = None
    # The file token.pickle stores the user's access and refresh tokens, and is
    # created automatically when the authorization flow completes for the first
    # time.
    if os.path.exists('token.pickle'):
        with open('token.pickle', 'rb') as token:
            creds = pickle.load(token)
    # If there are no (valid) credentials available, let the user log in.
    if not creds or not creds.valid:
        if creds and creds.expired and creds.refresh_token:
            creds.refresh(Request())
        else:
            flow = InstalledAppFlow.from_client_secrets_file(
                'credentials.json', SCOPES)
            creds = flow.run_local_server(port=0)
        # Save the credentials for the next run
        with open('token.pickle', 'wb') as token:
            pickle.dump(creds, token)

    return build('gmail', 'v1', credentials=creds)


def create_message(sender, to, subject, message_text):
    message = MIMEText(message_text)
    message['to'] = to
    message['from'] = sender
    message['subject'] = subject
    return {'raw': base64.urlsafe_b64encode(message.as_bytes()).decode()}

def send_message(service, user_id, message):
    try:
        message = (service.users().messages().send(userId=user_id, body=message).execute())
        print('Message Id: {}'.format(message['id']))
        return message
    except HTTPError as error:
        print('An error occurred: {}'.format(error))


def main(): 
    with open('data.json', 'r') as f:
        to_send = json.load(f)
    guilty_list = ['guilty'] + (len(to_send) - 1) * ['innocent']
    random.shuffle(guilty_list)
    sending_results = [{'name': d[0], 'status': g, 'email': d[1]} 
                       for d, g in zip(to_send.items(), guilty_list)]
    service = login()
    from_email = os.getenv('FROM_EMAIL')
    message_content = """
      Hi {to_name},

      Put whatever here. You will be {status} of murdering the victim.

      PS: this was sent by a bot, no one will know who is guilty except the guilty party themselves!"""
    for d in sending_results:
        m = create_message(from_email,  d['email'], 
                           'Virtual Murder Mystery Party Role', 
                           message_content.format(to_name=d['name'], status=d['status'])) 
        sent_message = send_message(service, 'me', m)
    with open('record_{}.json'.format(datetime.datetime.now()), 'w') as out_f:
        json.dump(sending_results, out_f)

if __name__ == '__main__':
    main()