#!/usr/bin/python
# -*- coding: utf-8 -*-
#
# Copyright (C) 2005-2013 Edgewall Software
# Copyright (C) 2005 Daniel Lundin <daniel@edgewall.com>
# All rights reserved.
#
# This software is licensed as described in the file COPYING, which
# you should have received as part of this distribution. The terms
# are also available at http://trac.edgewall.com/license.html.
#
# This software consists of voluntary contributions made by many
# individuals. For the exact contribution history, see the revision
# history and logs, available at http://trac.edgewall.org/.

"""
emailfilter.py -- Email tickets to Trac.

A simple MTA filter to create Trac tickets from inbound emails.

Copyright 2005, Daniel Lundin <daniel@edgewall.com>
Copyright 2005, Edgewall Software

Please note:

This is only a starting point. See
 * http://trac.edgewall.org/ticket/5327 and
 * http://trac-hacks.org/intertrac/EmailtoTracScript
for more complete and advanced examples.

The scripts reads emails from stdin and inserts directly into a Trac database.
MIME headers are mapped as follows:

    * From: => Reporter
    * Subject: => Summary
    * Body => Description

How to use
----------
 * Set TRAC_ENV_PATH to the path of your project's Trac environment
 * Configure script as a mail (pipe) filter with your MTA
    typically, this involves adding a line like this to /etc/aliases:
       somename: |/path/to/email2trac.py
    Check your MTA's documentation for specifics.

Todo
----
  * Configure target database through env variable?
  * Handle/discard HTML parts
  * Attachment support
"""

TRAC_ENV_PATH = '/var/trac/test'

import email
import sys

from trac.env import Environment
from trac.ticket import Ticket


class TicketEmailParser(object):

    env = None

    def __init__(self, env):
        self.env = env

    def parse(self, fp):
        msg = email.message_from_file(fp)
        tkt = Ticket(self.env)
        tkt['status'] = 'new'
        tkt['reporter'] = msg['from']
        tkt['summary'] = msg['subject']
        for part in msg.walk():
            if part.get_content_type() == 'text/plain':
                tkt['description'] = part.get_payload(decode=1).strip()

        if tkt.values.get('description'):
            tkt.insert()

if __name__ == '__main__':
    env = Environment(TRAC_ENV_PATH, create=0)
    tktparser = TicketEmailParser(env)
    tktparser.parse(sys.stdin)
