ftc_updates.py

import time
import hashlib
from urllib.request import urlopen
import smtplib
import ssl
import os
import filecmp
from dotenv import load_dotenv

DIR_PATH = os.path.dirname(os.path.realpath(__file__))

base_url = 'https://www.ncfllandftc.com/'
URLs = ['ftc-hybrid-season-structure.html', 'ftc-tournaments.html',
        'ftc-registration-payment.html']


# send_email arguments:
# recipient - str - recipient's email address
# subject - str - subject line of email
# body - str - body of email
def send_email(recipient, subject, body):

    port = 465  # For SSL
    smtp_server = "smtp.gmail.com"
    sender_email = "[email protected]"
    pw = os.getenv('APP_PW')

    msg = f"From: {sender_email}\nTo: {recipient}\nSubject: {subject}\n\n{body}"

    context = ssl.create_default_context()
    with smtplib.SMTP_SSL(smtp_server, port, context=context) as server:
        server.ehlo()
        server.login(sender_email, pw)
        server.sendmail(sender_email, recipient, msg)


def fetch_websites():

    current = []
    for URL in URLs:
        response = urlopen(base_url + URL).read()
        current.append(hashlib.sha224(response).hexdigest())

    # requests downloads the content, create a new file to store the data
    with open(f"{DIR_PATH}/new_hash.txt", "w") as f:
        f.write('\n'.join(current))

    # see if files match
    try:
        filecmp.cmp(f"{DIR_PATH}/old_hash.txt", f"{DIR_PATH}/new_hash.txt")
    except IOError:
        # old file doesn't exist yet, create empty file
        f = open(f"{DIR_PATH}/old_hash.txt", "w")
        f.close()

    # files match, no new forms submitted
    if filecmp.cmp(f"{DIR_PATH}/old_hash.txt", f"{DIR_PATH}/new_hash.txt"):
        print("No new updates. Exiting...")
        return False
    # files don't match, so process new data
    else:
        print("Updates! Proceeding... ")
        return True


def main():
    print("Fetching websites...")
    new = fetch_websites()
    if new:
        print("Processing new data...")
        recipient = '[email protected]'
        subject = 'FTC Updates'
        body = 'There\'s been an update!'
        send_email(recipient, subject, body)
        with open(f"{DIR_PATH}/new_hash.txt", "r") as f:
            contents = f.read()
        with open(f"{DIR_PATH}/old_hash.txt", "w") as f:
            f.write(contents)


if __name__ == '__main__':
    load_dotenv()
    main()