430 lines
17 KiB
Python
430 lines
17 KiB
Python
# 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
|
|
from typing import TYPE_CHECKING, Any, Dict, List, Optional
|
|
|
|
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.types import JsonDict
|
|
from synapse.util.metrics import Measure
|
|
|
|
if TYPE_CHECKING:
|
|
from synapse.server import HomeServer
|
|
|
|
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: "HomeServer"):
|
|
super().__init__(hs)
|
|
|
|
self.store = hs.get_datastore()
|
|
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: Optional[int] = 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: str, search_term: str, limit: int
|
|
) -> JsonDict:
|
|
"""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) -> None:
|
|
"""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: str, profile: ProfileInfo
|
|
) -> None:
|
|
"""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: str) -> None:
|
|
"""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) -> None:
|
|
# 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: List[Dict[str, Any]]) -> None:
|
|
"""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)
|
|
# It isn't expected for this event to not exist, but we
|
|
# don't want the entire background process to break.
|
|
if event is None:
|
|
continue
|
|
|
|
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: str,
|
|
prev_event_id: Optional[str],
|
|
event_id: Optional[str],
|
|
typ: str,
|
|
) -> None:
|
|
"""Handle a room having potentially changed from/to world_readable/publicly
|
|
joinable.
|
|
|
|
Args:
|
|
room_id: The ID of the room which changed.
|
|
prev_event_id: The previous event before the state change
|
|
event_id: The new event after the state change
|
|
typ: 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
|
|
|
|
other_users_in_room_with_profiles = (
|
|
await self.store.get_users_in_room_with_profiles(room_id)
|
|
)
|
|
|
|
# Remove every user from the sharing tables for that room.
|
|
for user_id in other_users_in_room_with_profiles.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 other_users_in_room_with_profiles.items():
|
|
await self._handle_new_user(room_id, user_id, profile)
|
|
|
|
async def _handle_new_user(
|
|
self, room_id: str, user_id: str, profile: ProfileInfo
|
|
) -> None:
|
|
"""Called when we might need to add user to directory
|
|
|
|
Args:
|
|
room_id: The room ID that user joined or started being public
|
|
user_id
|
|
"""
|
|
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.
|
|
other_users_in_room = await self.store.get_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 other_users_in_room:
|
|
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 other_users_in_room:
|
|
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: str, user_id: str) -> None:
|
|
"""Called when we might need to remove user from directory
|
|
|
|
Args:
|
|
room_id: The room ID that user left or stopped being public that
|
|
user_id
|
|
"""
|
|
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: str,
|
|
room_id: str,
|
|
prev_event_id: Optional[str],
|
|
event_id: Optional[str],
|
|
) -> None:
|
|
"""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)
|