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synapse-product/synapse/handlers/user_directory.py
Dirk Klimpel c07022303e
Fix a bug that deactivated users appear in the directory (#8933) 
Fixes a bug that deactivated users appear in the directory when their profile information was updated.

To change profile information of deactivated users is neccesary for example you will remove displayname or avatar.
But they should not appear in directory. They are deactivated.



Co-authored-by: Erik Johnston <erikj@jki.re>
2020-12-17 12:05:39 +00:00

407 lines
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Python
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# -*- coding: utf-8 -*-
# Copyright 2017 Vector Creations 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.
import logging
import synapse.metrics
from synapse.api.constants import EventTypes, HistoryVisibility, JoinRules, Membership
from synapse.handlers.state_deltas import StateDeltasHandler
from synapse.metrics.background_process_metrics import run_as_background_process
from synapse.storage.roommember import ProfileInfo
from synapse.util.metrics import Measure
logger = logging.getLogger(__name__)
class UserDirectoryHandler(StateDeltasHandler):
"""Handles querying of and keeping updated the user_directory.
N.B.: ASSUMES IT IS THE ONLY THING THAT MODIFIES THE USER DIRECTORY
The user directory is filled with users who this server can see are joined to a
world_readable or publicly joinable room. We keep a database table up to date
by streaming changes of the current state and recalculating whether users should
be in the directory or not when necessary.
"""
def __init__(self, hs):
super().__init__(hs)
self.store = hs.get_datastore()
self.state = hs.get_state_handler()
self.server_name = hs.hostname
self.clock = hs.get_clock()
self.notifier = hs.get_notifier()
self.is_mine_id = hs.is_mine_id
self.update_user_directory = hs.config.update_user_directory
self.search_all_users = hs.config.user_directory_search_all_users
self.spam_checker = hs.get_spam_checker()
# The current position in the current_state_delta stream
self.pos = None
# Guard to ensure we only process deltas one at a time
self._is_processing = False
if self.update_user_directory:
self.notifier.add_replication_callback(self.notify_new_event)
# We kick this off so that we don't have to wait for a change before
# we start populating the user directory
self.clock.call_later(0, self.notify_new_event)
async def search_users(self, user_id, search_term, limit):
"""Searches for users in directory
Returns:
dict of the form::
{
"limited": <bool>, # whether there were more results or not
"results": [ # Ordered by best match first
{
"user_id": <user_id>,
"display_name": <display_name>,
"avatar_url": <avatar_url>
}
]
}
"""
results = await self.store.search_user_dir(user_id, search_term, limit)
# Remove any spammy users from the results.
non_spammy_users = []
for user in results["results"]:
if not await self.spam_checker.check_username_for_spam(user):
non_spammy_users.append(user)
results["results"] = non_spammy_users
return results
def notify_new_event(self):
"""Called when there may be more deltas to process
"""
if not self.update_user_directory:
return
if self._is_processing:
return
async def process():
try:
await self._unsafe_process()
finally:
self._is_processing = False
self._is_processing = True
run_as_background_process("user_directory.notify_new_event", process)
async def handle_local_profile_change(self, user_id, profile):
"""Called to update index of our local user profiles when they change
irrespective of any rooms the user may be in.
"""
# FIXME(#3714): We should probably do this in the same worker as all
# the other changes.
# Support users are for diagnostics and should not appear in the user directory.
is_support = await self.store.is_support_user(user_id)
# When change profile information of deactivated user it should not appear in the user directory.
is_deactivated = await self.store.get_user_deactivated_status(user_id)
if not (is_support or is_deactivated):
await self.store.update_profile_in_user_dir(
user_id, profile.display_name, profile.avatar_url
)
async def handle_user_deactivated(self, user_id):
"""Called when a user ID is deactivated
"""
# FIXME(#3714): We should probably do this in the same worker as all
# the other changes.
await self.store.remove_from_user_dir(user_id)
async def _unsafe_process(self):
# If self.pos is None then means we haven't fetched it from DB
if self.pos is None:
self.pos = await self.store.get_user_directory_stream_pos()
# If still None then the initial background update hasn't happened yet
if self.pos is None:
return None
# Loop round handling deltas until we're up to date
while True:
with Measure(self.clock, "user_dir_delta"):
room_max_stream_ordering = self.store.get_room_max_stream_ordering()
if self.pos == room_max_stream_ordering:
return
logger.debug(
"Processing user stats %s->%s", self.pos, room_max_stream_ordering
)
max_pos, deltas = await self.store.get_current_state_deltas(
self.pos, room_max_stream_ordering
)
logger.debug("Handling %d state deltas", len(deltas))
await self._handle_deltas(deltas)
self.pos = max_pos
# Expose current event processing position to prometheus
synapse.metrics.event_processing_positions.labels("user_dir").set(
max_pos
)
await self.store.update_user_directory_stream_pos(max_pos)
async def _handle_deltas(self, deltas):
"""Called with the state deltas to process
"""
for delta in deltas:
typ = delta["type"]
state_key = delta["state_key"]
room_id = delta["room_id"]
event_id = delta["event_id"]
prev_event_id = delta["prev_event_id"]
logger.debug("Handling: %r %r, %s", typ, state_key, event_id)
# For join rule and visibility changes we need to check if the room
# may have become public or not and add/remove the users in said room
if typ in (EventTypes.RoomHistoryVisibility, EventTypes.JoinRules):
await self._handle_room_publicity_change(
room_id, prev_event_id, event_id, typ
)
elif typ == EventTypes.Member:
change = await self._get_key_change(
prev_event_id,
event_id,
key_name="membership",
public_value=Membership.JOIN,
)
if change is False:
# Need to check if the server left the room entirely, if so
# we might need to remove all the users in that room
is_in_room = await self.store.is_host_joined(
room_id, self.server_name
)
if not is_in_room:
logger.debug("Server left room: %r", room_id)
# Fetch all the users that we marked as being in user
# directory due to being in the room and then check if
# need to remove those users or not
user_ids = await self.store.get_users_in_dir_due_to_room(
room_id
)
for user_id in user_ids:
await self._handle_remove_user(room_id, user_id)
return
else:
logger.debug("Server is still in room: %r", room_id)
is_support = await self.store.is_support_user(state_key)
if not is_support:
if change is None:
# Handle any profile changes
await self._handle_profile_change(
state_key, room_id, prev_event_id, event_id
)
continue
if change: # The user joined
event = await self.store.get_event(event_id, allow_none=True)
profile = ProfileInfo(
avatar_url=event.content.get("avatar_url"),
display_name=event.content.get("displayname"),
)
await self._handle_new_user(room_id, state_key, profile)
else: # The user left
await self._handle_remove_user(room_id, state_key)
else:
logger.debug("Ignoring irrelevant type: %r", typ)
async def _handle_room_publicity_change(
self, room_id, prev_event_id, event_id, typ
):
"""Handle a room having potentially changed from/to world_readable/publicly
joinable.
Args:
room_id (str)
prev_event_id (str|None): The previous event before the state change
event_id (str|None): The new event after the state change
typ (str): Type of the event
"""
logger.debug("Handling change for %s: %s", typ, room_id)
if typ == EventTypes.RoomHistoryVisibility:
change = await self._get_key_change(
prev_event_id,
event_id,
key_name="history_visibility",
public_value=HistoryVisibility.WORLD_READABLE,
)
elif typ == EventTypes.JoinRules:
change = await self._get_key_change(
prev_event_id,
event_id,
key_name="join_rule",
public_value=JoinRules.PUBLIC,
)
else:
raise Exception("Invalid event type")
# If change is None, no change. True => become world_readable/public,
# False => was world_readable/public
if change is None:
logger.debug("No change")
return
# There's been a change to or from being world readable.
is_public = await self.store.is_room_world_readable_or_publicly_joinable(
room_id
)
logger.debug("Change: %r, is_public: %r", change, is_public)
if change and not is_public:
# If we became world readable but room isn't currently public then
# we ignore the change
return
elif not change and is_public:
# If we stopped being world readable but are still public,
# ignore the change
return
users_with_profile = await self.state.get_current_users_in_room(room_id)
# Remove every user from the sharing tables for that room.
for user_id in users_with_profile.keys():
await self.store.remove_user_who_share_room(user_id, room_id)
# Then, re-add them to the tables.
# NOTE: this is not the most efficient method, as handle_new_user sets
# up local_user -> other_user and other_user_whos_local -> local_user,
# which when ran over an entire room, will result in the same values
# being added multiple times. The batching upserts shouldn't make this
# too bad, though.
for user_id, profile in users_with_profile.items():
await self._handle_new_user(room_id, user_id, profile)
async def _handle_new_user(self, room_id, user_id, profile):
"""Called when we might need to add user to directory
Args:
room_id (str): room_id that user joined or started being public
user_id (str)
"""
logger.debug("Adding new user to dir, %r", user_id)
await self.store.update_profile_in_user_dir(
user_id, profile.display_name, profile.avatar_url
)
is_public = await self.store.is_room_world_readable_or_publicly_joinable(
room_id
)
# Now we update users who share rooms with users.
users_with_profile = await self.state.get_current_users_in_room(room_id)
if is_public:
await self.store.add_users_in_public_rooms(room_id, (user_id,))
else:
to_insert = set()
# First, if they're our user then we need to update for every user
if self.is_mine_id(user_id):
is_appservice = self.store.get_if_app_services_interested_in_user(
user_id
)
# We don't care about appservice users.
if not is_appservice:
for other_user_id in users_with_profile:
if user_id == other_user_id:
continue
to_insert.add((user_id, other_user_id))
# Next we need to update for every local user in the room
for other_user_id in users_with_profile:
if user_id == other_user_id:
continue
is_appservice = self.store.get_if_app_services_interested_in_user(
other_user_id
)
if self.is_mine_id(other_user_id) and not is_appservice:
to_insert.add((other_user_id, user_id))
if to_insert:
await self.store.add_users_who_share_private_room(room_id, to_insert)
async def _handle_remove_user(self, room_id, user_id):
"""Called when we might need to remove user from directory
Args:
room_id (str): room_id that user left or stopped being public that
user_id (str)
"""
logger.debug("Removing user %r", user_id)
# Remove user from sharing tables
await self.store.remove_user_who_share_room(user_id, room_id)
# Are they still in any rooms? If not, remove them entirely.
rooms_user_is_in = await self.store.get_user_dir_rooms_user_is_in(user_id)
if len(rooms_user_is_in) == 0:
await self.store.remove_from_user_dir(user_id)
async def _handle_profile_change(self, user_id, room_id, prev_event_id, event_id):
"""Check member event changes for any profile changes and update the
database if there are.
"""
if not prev_event_id or not event_id:
return
prev_event = await self.store.get_event(prev_event_id, allow_none=True)
event = await self.store.get_event(event_id, allow_none=True)
if not prev_event or not event:
return
if event.membership != Membership.JOIN:
return
prev_name = prev_event.content.get("displayname")
new_name = event.content.get("displayname")
# If the new name is an unexpected form, do not update the directory.
if not isinstance(new_name, str):
new_name = prev_name
prev_avatar = prev_event.content.get("avatar_url")
new_avatar = event.content.get("avatar_url")
# If the new avatar is an unexpected form, do not update the directory.
if not isinstance(new_avatar, str):
new_avatar = prev_avatar
if prev_name != new_name or prev_avatar != new_avatar:
await self.store.update_profile_in_user_dir(user_id, new_name, new_avatar)
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