mailman/rules/no_subject.py

   1 # Copyright (C) 2007-2009 by the Free Software Foundation, Inc.
   2 #
   3 # This file is part of GNU Mailman.
   4 #
   5 # GNU Mailman is free software: you can redistribute it and/or modify it under
   6 # the terms of the GNU General Public License as published by the Free
   7 # Software Foundation, either version 3 of the License, or (at your option)
   8 # any later version.
   9 #
  10 # GNU Mailman is distributed in the hope that it will be useful, but WITHOUT
  11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13 # more details.
  14 #
  15 # You should have received a copy of the GNU General Public License along with
  16 # GNU Mailman.  If not, see <http://www.gnu.org/licenses/>.
  17
  18 """The no-Subject header rule."""
  19
  20 __all__ = ['NoSubject']
  21 __metaclass__ = type
  22
  23
  24 from zope.interface import implements
  25
  26 from mailman.i18n import _
  27 from mailman.interfaces.rules import IRule
  28
  29
  30 \f
  31 class NoSubject:
  32     """The no-Subject rule."""
  33     implements(IRule)
  34
  35     name = 'no-subject'
  36     description = _('Catch messages with no, or empty, Subject headers.')
  37     record = True
  38
  39     def check(self, mlist, msg, msgdata):
  40         """See `IRule`."""
  41         subject = msg.get('subject', '').strip()
  42         return subject == ''