"""Find all list members with 'bad' email addresses
and remove them.

Save as bin/remove_bad_address.py

Run via

   bin/withlist -r remove_bad_address <listname> [options]

or

   bin/withlist -a -r remove_bad_address [-- options]

to do all lists.

Options:
    -n
    --no-change
        Don't actually remove any members.  Just report.
"""

import sys
import getopt

from Mailman import Utils
from Mailman import Errors

try:
    True, False
except NameError:
    True = 1
    False = 0

def usage(code, msg=''):
    if code:
        fd = sys.stderr
    else:
        fd = sys.stdout
    print >> fd, __doc__
    if msg:
        print >> fd, msg
    sys.exit(code)

def remove_bad_address(mlist, *args):

    try:
        opts, args = getopt.getopt(args, 'n', ['no-change'])
    except getopt.error, msg:
        usage(1, msg)

    change = True
    for opt, arg in opts:
        if opt in ('-n', '--no-change'):
            change = False

    if not mlist.Locked():
        mlist.Lock()
    for member in mlist.getMembers():
        try:
            Utils.ValidateEmail(member)
        except Errors.EmailAddressError:
            print 'List: %s, Invalid address: %s' % (mlist.real_name, member)
            if change:
                try:
                    mlist.removeMember(member)
                    print '    removed.'
                except Errors.NotAMemberError:
                    print '    unable to remove.'
    mlist.Save()
    mlist.Unlock()