#!/usr/bin/python
"""XMail and mailman integration script

To be used as a cmdalias script. If anyone has a better way of integrating this I'd be happy to listen. I'd prefer a dynamic alias handling scheme.

"""
# Change these to reflect your local situation
MAILMAN_HOME = '/data/mailman'
XMAIL_HOME = '/data/MailRoot'
ECONV = XMAIL_HOME + '/bin/econv'
LOG = MAILMAN_HOME + '/logs/xmail_integration'

import sys, re, os, tempfile

def log(msg):
    import time
    timestamp = time.strftime('%Y%m%d-%H:%M:%S', time.localtime())
    _logfile = open(LOG, 'a')
    _logfile.write('%s [%s %s]: %s\n' % (
	timestamp, sys.argv[1], sys.argv[2], msg))
    _logfile.close()

rcpt = sys.argv[1]
spoolfile = sys.argv[2]

# Isolate the list name and any mailman suffixes, and the VERP if present
splitlocal = re.compile("(?P<listname>[^+@]+?)"
    "(?P<suffix>-bounces|-confirm|-join|-leave|-owner|-request|"
               "-admin|-subscribe|-unsubscribe)?"
    "(?P<verp>\+.*)?@").match

match = splitlocal(rcpt)
if not match:
    # Hmm, not an address format we could handle..
    log("Couldn't match on address")
    sys.exit(1)

name, command, verp = match.groups()

# Normalize the list name to lower case so it matches the file names correctly.
name = name.lower()

# If this is no list, bail out now
listconf = '%s/lists/%s/config.pck' % (MAILMAN_HOME, name)
if not os.path.isfile(listconf):
    log("Not an existing list")
    sys.exit(1)

# So, this is a list email. We'll now need to convert this and pass it on to
# mailman. First, a sanity check
if verp and command not in ('-bounces', '-confirm'):
    # Erm; we don't support VERP for anything else. So this must be something 
    # not mailman related then. Bail out and let XMail handle it.
    print "Mailman integration: found VERP when VERP not supported"
    log("Found VERP portion where we didn't expect one.")
    sys.exit(1)

# Normalize (strip the '-', default to 'post')
command = command and command[1:] or 'post'

# Pipe the spool file through econv and pass the result to mailman
os.system('%s --unix --input %s | %s %s %s >> %s &>1' % (
    ECONV, spoolfile, MAILMAN_HOME + '/mail/mailman', command, name, LOG))

# Remove temp spoolfile.
os.remove(spoolfile)

# Record the completed transfer.
log("Message transferred successfully")