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# Copyright (C) 2007-2014 by the Free Software Foundation, Inc.
#
# This file is part of GNU Mailman.
#
# GNU Mailman 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 3 of the License, or (at your option)
# any later version.
#
# GNU Mailman 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
# GNU Mailman. If not, see <http://www.gnu.org/licenses/>.
"""The no-Subject header rule."""
from __future__ import absolute_import, print_function, unicode_literals
__metaclass__ = type
__all__ = [
'NoSubject',
]
from zope.interface import implementer
from mailman.core.i18n import _
from mailman.interfaces.rules import IRule
@implementer(IRule)
class NoSubject:
"""The no-Subject rule."""
name = 'no-subject'
description = _('Catch messages with no, or empty, Subject headers.')
record = True
def check(self, mlist, msg, msgdata):
"""See `IRule`."""
subject = msg.get('subject', '').strip()
return subject == ''
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