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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""News to mail gateway script. Copyright 2000 Cosimo Alfarano

Author: Cosimo Alfarano
Date: June 11 2000

pygs - Copyright 2000 by Cosimo Alfarano <Alfarano@Students.CS.UniBo.It>
You can use this software under the terms of the GPL. If we meet some day,
and you think this stuff is worth it, you can buy me a beer in return.

Thanks to md for this useful formula. Beer is beer.

Gets news article and sends it via SMTP.
"""
from __future__ import print_function

import argparse
import logging
import mail2news
import nntplib
import sys

# logging.basicConfig(level=logging.DEBUG)

def parse_cmdline():
    parser = argparse.ArgumentParser(
        description='%s version %s - Copyright 2000 Cosimo Alfarano\n%s' %
        ('pyg', mail2news.VERSION, mail2news.DESC))

    parser.add_argument('-s', '--newsserver', default='')
    parser.add_argument('-a', '--approver', default='',
                        help="address of moderator/approver")
    parser.add_argument('-n', '--newsgroup', default='',
                        help='newsgroup[s] (specified as comma separated ' +
                        'without spaces list)', required=True)
    parser.add_argument('-u', '--user', default='',
                        help='NNTP server user (for authentication)')
    parser.add_argument('-p', '--password', default='',
                        help='NNTP server password (for authentication)')
    parser.add_argument('-P', '--port', default='')
    parser.add_argument('-e', '--envellope', default='')
    parser.add_argument('-l', '--logfile')

    parser.add_argument('-T', '--test', action='store_true',
                        help='test mode (not send article via NNTP)')
    parser.add_argument('-v', '--verbose', action='store_true',
                        help='verbose output ' +
                        '(usefull with -T option for debugging)')

    args = parser.parse_args()

    if not args.newsgroup:
        raise argparse.ArgumentError('Error: Missing Newsgroups\n')

    return args


"""main is structured in 4 phases:
    1) check and set pyg's internal variables
    2) check whitelist for users' permission
    3) format rfc 822 headers from input article
    4) open smtp connection and send e-mail
"""


try:

    """phase 1:
    check and set pyg's internal variables
    """
    opt = parse_cmdline()

    m2n = mail2news.mail2news(opt)
    owner = None

    """phase 3:
    format rfc 822 headers from input article
    """
    m2n.renameheads()    # rename useless heads
    m2n.removeheads()    # remove other heads

    m2n.sortheads()        # sort remaining heads :)

    if opt.verbose:
        print(m2n.message.as_string())

    logging.debug('m2n.payload = len %d', len(m2n.message.get_payload()))
    if len(m2n.message.get_payload()) > 0:
#        wl.logmsg(m2n.heads_dict,wl.ACCEPT,owner)
        if not opt.test:
            try:
                resp = m2n.sendemail()
            except nntplib.NNTPError as ex:
                print(ex)

except KeyboardInterrupt:
    print('Keyboard Interrupt')
    sys.exit(0)