ticketfrei/mailbot.py

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Python
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#!/usr/bin/env python3
import sendmail
import ssl
import time
import trigger
import datetime
import email
import logging
import pytoml as toml
import imaplib
logger = logging.getLogger(__name__)
class Mailbot(object):
"""
Bot which sends Mails if mentioned via twitter/mastodon, and tells
other bots that it received mails.
"""
def __init__(self, config, trigger, history_path="last_mail"):
"""
Creates a Bot who listens to mails and forwards them to other
bots.
:param config: (dictionary) config.toml as a dictionary of dictionaries
"""
self.config = config
self.trigger = trigger
self.history_path = history_path
self.last_mail = self.get_history(self.history_path)
try:
self.mailinglist = self.config["mail"]["list"]
except KeyError:
self.mailinglist = None
self.mailbox = imaplib.IMAP4_SSL(self.config["mail"]["imapserver"])
context = ssl.create_default_context()
try:
self.mailbox.starttls(ssl_context=context)
except:
logger.error('StartTLS failed', exc_info=True)
try:
self.mailbox.login(self.config["mail"]["user"], self.config["mail"]["passphrase"])
except imaplib.IMAP4.error:
logger.error("Login to mail server failed", exc_info=True)
try:
mailer = sendmail.Mailer(config)
mailer.send('', config['mail']['contact'],
'Ticketfrei Crash Report',
attachment=config['logging']['logpath'])
except:
logger.error('Mail sending failed', exc_info=True)
def listen(self):
"""
listen for mails which contain goodwords but no badwords.
:return:
"""
rv, data = self.mailbox.select("Inbox")
msgs = []
if rv == 'OK':
rv, data = self.mailbox.search(None, "ALL")
if rv != 'OK':
return msgs
for num in data[0].split():
rv, data = self.mailbox.fetch(num, '(RFC822)')
if rv != 'OK':
logger.error("Couldn't fetch mail %s %s" % (rv, str(data)))
return msgs
msg = email.message_from_bytes(data[0][1])
# get a comparable date out of the email
date_tuple = email.utils.parsedate_tz(msg['Date'])
date_tuple = datetime.datetime.fromtimestamp(email.utils.mktime_tz(date_tuple))
date = (date_tuple - datetime.datetime(1970, 1, 1)).total_seconds()
if date > self.get_history(self.history_path):
self.last_mail = date
self.save_last_mail()
msgs.append(msg)
return msgs
def get_history(self, path):
""" This counter is needed to keep track of your mails, so you
don't double parse them
:param path: string: contains path to the file where the ID of the
last_mail is stored.
:return: last_mail: ID of the last mail the bot parsed
"""
try:
with open(path, "r+") as f:
last_mail = f.read()
except IOError:
with open(path, "w+") as f:
last_mail = "0"
f.write(last_mail)
return float(last_mail)
def save_last_mail(self):
""" Saves the last retweeted tweet in last_mention. """
with open(self.history_path, "w") as f:
f.write(str(self.last_mail))
def send_report(self, statuses):
"""
sends reports by twitter & mastodon to a mailing list.
:param statuses: (list) of status strings
"""
for status in statuses:
mailer = sendmail.Mailer(self.config)
mailer.send(status, self.mailinglist, "Warnung: Kontrolleure gesehen")
def to_social(self, msg):
"""
sends a report from the mailing list to social
:param msg: email.parser.Message object
:return: post: (string) of author + text
"""
# get a comparable date out of the email
date_tuple = email.utils.parsedate_tz(msg['Date'])
date_tuple = datetime.datetime.fromtimestamp(email.utils.mktime_tz(date_tuple))
date = (date_tuple-datetime.datetime(1970,1,1)).total_seconds()
author = msg.get("From") # get mail author from email header
# :todo take only the part before the @
text = msg.get_payload()
post = author + ": " + text
self.last_mail = date
self.save_last_mail()
return post
def flow(self, statuses):
"""
to be iterated
:param statuses: (list) of statuses to send to mailinglist
:return: list of statuses to post in mastodon & twitter
"""
self.send_report(statuses)
msgs = self.listen()
statuses = []
for msg in msgs:
if self.trigger.is_ok(msg.get_payload()):
statuses.append(self.to_social(msg))
return statuses
if __name__ == "__main__":
# read config in TOML format (https://github.com/toml-lang/toml#toml)
with open('config.toml') as configfile:
config = toml.load(configfile)
fh = logging.FileHandler(config['logging']['logpath'])
fh.setLevel(logging.DEBUG)
logger.addHandler(fh)
trigger = trigger.Trigger(config)
m = Mailbot(config, trigger)
statuses = []
try:
while 1:
print("Received Reports: " + str(m.flow(statuses)))
time.sleep(1)
except KeyboardInterrupt:
print("Good bye. Remember to restart the bot!")
except:
logger.error('Shutdown', exc_info=True)
m.save_last_mail()
try:
mailer = sendmail.Mailer(config)
mailer.send('', config['mail']['contact'],
'Ticketfrei Crash Report',
attachment=config['logging']['logpath'])
except:
logger.error('Mail sending failed', exc_info=True)