# Copyright (C) 2012 by the Free Software Foundation, Inc.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
# USA.

"""Discard all subscription requests older than a specified time

Save as bin/discard_subs.py

Run via

   bin/withlist -r discard_subs LISTNAME N

or

   bin/withlist -a -r discard_subs -- N

to do all lists.

N is the number of days beyond which a request is "old".

Discards will be logged to Mailman's vette log.
"""

import sys
import time

from Mailman import mm_cfg

def discard_subs(mlist, days):
    try:
        old = time.time() - int(days) * 24 * 3600
    except (TypeError, ValueError):
        print >> sys.stderr, 'discard_subs: argument must be a number'
        sys.exit(1)
    if not mlist.Locked():
        mlist.Lock()
    pendingsubs = mlist.GetSubscriptionIds()
    changed = False
    for id in pendingsubs:
        if mlist.GetRecord(id)[0] > old:
            continue
        mlist.HandleRequest(id, mm_cfg.DISCARD, 'Discarded by script')
        changed = True
    if changed:
        mlist.Save()
    mlist.Unlock()