# Copyright (C) 1998-2008 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.

"""Move the message to the mail->news queue."""

__metaclass__ = type
__all__ = ['ToUsenet']


import logging

from zope.interface import implements

from mailman.configuration import config
from mailman.i18n import _
from mailman.interfaces import IHandler
from mailman.queue import Switchboard

COMMASPACE = ', '

log = logging.getLogger('mailman.error')



class ToUsenet:
    """Move the message to the outgoing news queue."""

    implements(IHandler)

    name = 'to-usenet'
    description = _('Move the message to the outgoing news queue.')

    def process(self, mlist, msg, msgdata):
        """See `IHandler`."""
        # Short circuits.
        if not mlist.gateway_to_news or \
               msgdata.get('isdigest') or \
               msgdata.get('fromusenet'):
            return
        # sanity checks
        error = []
        if not mlist.linked_newsgroup:
            error.append('no newsgroup')
        if not mlist.nntp_host:
            error.append('no NNTP host')
        if error:
            log.error('NNTP gateway improperly configured: %s',
                      COMMASPACE.join(error))
            return
        # Put the message in the news runner's queue
        newsq = Switchboard(config.NEWSQUEUE_DIR)
        newsq.enqueue(msg, msgdata, listname=mlist.fqdn_listname)