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# Copyright (C) 2007-2016 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 import public
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 zope.component import getUtility
from zope.interface import implementer
@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)
user_manager = getUtility(IUserManager)
for sender in msg.senders:
if ban_manager.is_banned(sender):
return False
# For each sender address, try to find a member associated with the
# email address. Start by checking the sender email directly. If the
# sender email is not a member, try to find the user linked to the
# email, and then check to see if *that* user, or any of the addresses
# linked to that user is a member. This rule hits of we find a member
# and their moderation action is not to defer.
for sender in msg.senders:
# Is the sender email itself a member?
member = mlist.members.get_member(sender)
if member is None:
# Is the sender email linked to a user?
user = user_manager.get_user(sender)
if user is not None:
# Are any of the emails linked to this user a member?
for address in user.addresses:
member = mlist.members.get_member(address.email)
if member is not None:
# We found a member, so we don't need to check any
# of the other linked addresses.
break
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 must somehow be a member or nonmember. The sender
# email can have one of those roles directly, or a user that the email
# is linked to can have one of those roles indirectly, or any address
# linked to one of those users can have one of those roles.
#
# If the sender is not somehow a member or nonmember, make them a
# nonmember. We maintain a record of which senders are members, and
# then the ones that aren't are made nonmembers.
found_linked_membership = set()
for sender in msg.senders:
member = mlist.members.get_member(sender)
if member is None:
user = user_manager.get_user(sender)
if user is not None:
for address in user.addresses:
if mlist.members.get_member(address.email) is not None:
found_linked_membership.add(sender)
else:
found_linked_membership.add(sender)
# Now we know whether the sender is somehow linked to a member or
# not. If not, and the email also isn't already a nonmember, make
# them a nonmember.
if (mlist.nonmembers.get_member(sender) is None
and sender not in found_linked_membership): # noqa
address = user_manager.get_address(sender)
assert address is not None, (
'Posting address is not registered: {}'.format(sender))
mlist.subscribe(address, MemberRole.nonmember)
# If a membership is found, the MemberModeration rule takes precedence.
for sender in msg.senders:
if sender in found_linked_membership:
return False
# Do nonmember moderation check.
for sender in msg.senders:
nonmember = mlist.nonmembers.get_member(sender)
assert nonmember is not None, (
'Sender not added to the nonmembers: {}'.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
# 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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