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# Copyright (C) 2007-2017 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/>.
"""Membership related rules."""
import re
from mailman.core.i18n import _
from mailman.interfaces.action import Action
from mailman.interfaces.bans import IBanManager
from mailman.interfaces.member import MemberRole
from mailman.interfaces.rules import IRule
from mailman.interfaces.usermanager import IUserManager
from public import public
from zope.component import getUtility
from zope.interface import implementer
def _find_sender_member(mlist, msg):
# For every sender email in the message, try to find a member associated
# with that email.
#
# First, check the sender email directly. If it's a member, we're done.
#
# Next, check to see if the sender email is linked to an existing user,
# and if so, check to see if any of the addresses linked to that user is a
# member.
user_manager = getUtility(IUserManager)
for sender in msg.senders:
member = mlist.members.get_member(sender)
if member is not None:
return member
user = user_manager.get_user(sender)
if user is not None:
for address in user.addresses:
member = mlist.members.get_member(address.email)
if member is not None:
return member
return None
@public
@implementer(IRule)
class MemberModeration:
"""The member moderation rule."""
name = 'member-moderation'
description = _('Match messages sent by moderated members.')
record = True
def check(self, mlist, msg, msgdata):
"""See `IRule`."""
# The MemberModeration rule misses unconditionally if any of the
# senders are banned.
ban_manager = IBanManager(mlist)
for sender in msg.senders:
if ban_manager.is_banned(sender):
return False
member = _find_sender_member(mlist, msg)
if member is None:
return False
action = (mlist.default_member_action
if member.moderation_action is None
else member.moderation_action)
if action is Action.defer:
# The regular moderation rules apply.
return False
elif action is not None:
# We must stringify the moderation action so that it can be
# stored in the pending request table.
msgdata['moderation_action'] = action.name
msgdata['moderation_sender'] = sender
msgdata.setdefault('moderation_reasons', []).append(
# This will get translated at the point of use.
'The message comes from a moderated member')
return True
# The sender is not a member so this rule does not match.
return False
def _record_action(msgdata, action, sender, reason):
msgdata['moderation_action'] = action
msgdata['moderation_sender'] = sender
msgdata.setdefault('moderation_reasons', []).append(reason)
@public
@implementer(IRule)
class NonmemberModeration:
"""The nonmember moderation rule."""
name = 'nonmember-moderation'
description = _('Match messages sent by nonmembers.')
record = True
def check(self, mlist, msg, msgdata):
"""See `IRule`."""
ban_manager = IBanManager(mlist)
user_manager = getUtility(IUserManager)
# The NonmemberModeration rule misses unconditionally if any of the
# senders are banned.
for sender in msg.senders:
if ban_manager.is_banned(sender):
return False
# Every sender email must be a member or nonmember directly. If it is
# neither, make the email a nonmembers.
for sender in msg.senders:
if (mlist.members.get_member(sender) is None
and mlist.nonmembers.get_member(sender) is None): # noqa
# The email must already be registered, since this happens in
# the incoming runner itself.
address = user_manager.get_address(sender)
assert address is not None, (
'Posting address is not registered: {}'.format(sender))
mlist.subscribe(address, MemberRole.nonmember)
# Check to see if any of the sender emails is already a member. If
# so, then this rule misses.
member = _find_sender_member(mlist, msg)
if member is not None:
return False
# Do nonmember moderation check.
for sender in msg.senders:
nonmember = mlist.nonmembers.get_member(sender)
assert nonmember is not None, (
"sender didn't get subscribed as a nonmember".format(sender))
# Check the '*_these_nonmembers' properties first. XXX These are
# legacy attributes from MM2.1; their database type is 'pickle' and
# they should eventually get replaced.
for action in ('accept', 'hold', 'reject', 'discard'):
legacy_attribute_name = '{}_these_nonmembers'.format(action)
checklist = getattr(mlist, legacy_attribute_name)
for addr in checklist:
if ((addr.startswith('^') and re.match(addr, sender))
or addr == sender): # noqa: W503
# The reason will get translated at the point of use.
reason = 'The sender is in the nonmember {} list'
_record_action(msgdata, action, sender,
reason.format(action))
return True
action = (mlist.default_nonmember_action
if nonmember.moderation_action is None
else nonmember.moderation_action)
if action is Action.defer:
# The regular moderation rules apply.
return False
elif action is not None:
# We must stringify the moderation action so that it can be
# stored in the pending request table.
#
# The reason will get translated at the point of use.
reason = 'The message is not from a list member'
_record_action(msgdata, action.name, sender, reason)
return True
# The sender must be a member, so this rule does not match.
return False
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