email-stuff

# https://python-emails.readthedocs.io/en/latest/
# https://requests.kennethreitz.org/en/master/

# mx lookup is not implemented

import json
import getpass
import xml.etree.ElementTree as ET

import requests
import emails


def get_from_isp(domain, email):
    """
    Read: https://developer.mozilla.org/de/docs/Mozilla/Thunderbird/Autokonfiguration#Configuration_server_at_ISP
    """
    isp = f'http://autoconfig.{domain}/mail/config-v1.1.xml?emailaddress={email}'
    auto = f'https://{domain}/.well-known/autoconfig/mail/config-v1.1.xml'
    try:
        req = requests.get(isp)
    except:
        try:
            req = requests.get(auto)
        except:
            return None
    if req.status_code != 200:
        raise ValueError('Domain not found.')
    return ET.fromstring(req.content)


def get_from_mozilla(domain):
    """
    Read: https://developer.mozilla.org/de/docs/Mozilla/Thunderbird/Autokonfiguration#ISPDB
    """
    req = requests.get(f'https://autoconfig.thunderbird.net/v1.1/{domain}')
    if req.status_code != 200:
        raise ValueError('Domain not found.')
    return ET.fromstring(req.content)


def email_rep(text, user, address):
    """
    https://developer.mozilla.org/en-US/docs/Mozilla/Thunderbird/Autoconfiguration/FileFormat/HowTo#Username
    """
    text = text.replace('%EMAILADDRESS%', address)
    text = text.replace('%EMAILLOCALPART%', user)
    return text


def parse_xml(xml, user, address):
    """
    https://developer.mozilla.org/en-US/docs/Mozilla/Thunderbird/Autoconfiguration/FileFormat/HowTo#Definition
    """
    results = []
    for server in xml.findall('emailProvider/outgoingServer'):
        result = {
            'hostname': server.find('hostname').text,
            'port': int(server.find('port').text),
            'sock_type': server.find('socketType').text,
            'username': email_rep(
                server.find('username').text,
                user,
                address),
            'auth': server.find('authentication').text,
        }
        results.append(result)
    return results


def parse_email(email):
    username, domain = email.strip().rsplit('@', 1)
    return username, domain


def get_smtp(email):
    try:
        username, domain = parse_email(email)
    except ValueError:
        ValueError(f'Could not parse {email}')
    try:
        xml = get_from_isp(domain, email)
    except:
        print(f'ISP has no info, trying mozilla')
        try:
            xml = get_from_mozilla(domain)
        except:
            ValueError(f'Could not find "{domain}".')
    try:
        results = parse_xml(xml, username, email)
    except:
        ValueError('Could not parse results')
    return results


def send(smtps, email):
    mail_to = input('Mail to: ')
    pw = getpass.getpass('Password: ')
    msg = emails.Message(
        charset='utf8', subject='Alarma',
        mail_from=email,
        mail_to=mail_to,
        text='Alarm test'
    )
    smtps = smtps.pop(0)
    smtp = {
        'host': smtps['hostname'],
        'port': smtps['port'],
        'user': smtps['username'],
        'password': pw,
        'ssl': True if smtps['sock_type'] == 'SSL' else False
    }
    if msg.send(smtp=smtp).status_code == 250:
        print('Success')
    else:
        print('No success')


def main():
    try:
        email = input('Email: ')
        results = get_smtp(email)
        send(results, email)
    except Exception as e:
        print(e)


if __name__ == '__main__':
    main()