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# -*- coding: utf-8 -*-
# Copyright 2017, 2018 New Vector Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from twisted.internet import defer, reactor
from ._base import BaseHandler
from synapse.types import UserID, create_requester
from synapse.util.logcontext import run_in_background
import logging
logger = logging.getLogger(__name__)
class DeactivateAccountHandler(BaseHandler):
"""Handler which deals with deactivating user accounts."""
def __init__(self, hs):
super(DeactivateAccountHandler, self).__init__(hs)
self._auth_handler = hs.get_auth_handler()
self._device_handler = hs.get_device_handler()
self._room_member_handler = hs.get_room_member_handler()
# Flag that indicates whether the process to part users from rooms is running
self._user_parter_running = False
# Start the user parter loop so it can resume parting users from rooms where
# it left off (if it has work left to do).
reactor.callWhenRunning(self._start_user_parting)
@defer.inlineCallbacks
def deactivate_account(self, user_id):
"""Deactivate a user's account
Args:
user_id (str): ID of user to be deactivated
Returns:
Deferred
"""
# FIXME: Theoretically there is a race here wherein user resets
# password using threepid.
# first delete any devices belonging to the user, which will also
# delete corresponding access tokens.
yield self._device_handler.delete_all_devices_for_user(user_id)
# then delete any remaining access tokens which weren't associated with
# a device.
yield self._auth_handler.delete_access_tokens_for_user(user_id)
yield self.store.user_delete_threepids(user_id)
yield self.store.user_set_password_hash(user_id, None)
# Add the user to a table of users penpding deactivation (ie.
# removal from all the rooms they're a member of)
yield self.store.add_user_pending_deactivation(user_id)
# Now start the process that goes through that list and
# parts users from rooms (if it isn't already running)
self._start_user_parting()
def _start_user_parting(self):
"""
Start the process that goes through the table of users
pending deactivation, if it isn't already running.
Returns:
None
"""
if not self._user_parter_running:
run_in_background(self._user_parter_loop)
@defer.inlineCallbacks
def _user_parter_loop(self):
"""Loop that parts deactivated users from rooms
Returns:
None
"""
self._user_parter_running = True
logger.info("Starting user parter")
try:
while True:
user_id = yield self.store.get_user_pending_deactivation()
if user_id is None:
break
logger.info("User parter parting %r", user_id)
yield self._part_user(user_id)
yield self.store.del_user_pending_deactivation(user_id)
logger.info("User parter finished parting %r", user_id)
logger.info("User parter finished: stopping")
finally:
self._user_parter_running = False
@defer.inlineCallbacks
def _part_user(self, user_id):
"""Causes the given user_id to leave all the rooms they're joined to
Returns:
None
"""
user = UserID.from_string(user_id)
rooms_for_user = yield self.store.get_rooms_for_user(user_id)
for room_id in rooms_for_user:
logger.info("User parter parting %r from %r", user_id, room_id)
try:
yield self._room_member_handler.update_membership(
create_requester(user),
user,
room_id,
"leave",
ratelimit=False,
)
except Exception:
logger.exception(
"Failed to part user %r from room %r: ignoring and continuing",
user_id, room_id,
)
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