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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
from twisted.internet import defer
from synapse.api.constants import EventTypes, JoinRules, Membership
from synapse.storage.roommember import ProfileInfo
from synapse.util.metrics import Measure
logger = logging.getLogger(__name__)
class UserDirectoyHandler(object):
def __init__(self, hs):
self.store = hs.get_datastore()
self.state = hs.get_state_handler()
self.server_name = hs.hostname
self.clock = hs.get_clock()
self.initially_handled_users = set()
self.pos = None
self._is_processing = False
@defer.inlineCallbacks
def notify_new_event(self):
if self._is_processing:
return
self._is_processing = True
try:
yield self._unsafe_process()
finally:
self._is_processing = False
@defer.inlineCallbacks
def _unsafe_process(self):
if self.pos is None:
self.pos = yield self.store.get_user_directory_stream_pos()
if self.pos is None:
yield self._do_initial_spam()
self.pos = yield self.store.get_user_directory_stream_pos()
while True:
with Measure(self.clock, "user_dir_delta"):
deltas = yield self.store.get_current_state_deltas(self.pos)
if not deltas:
return
yield self._handle_deltas(deltas)
self.pos = deltas[-1]["stream_id"]
yield self.store.update_user_directory_stream_pos(self.pos)
@defer.inlineCallbacks
def _handle_room(self, room_id):
# TODO: Check we're still joined to room
is_public = yield self.store.is_room_world_readable_or_publicly_joinable(room_id)
if not is_public:
return
users_with_profile = yield self.state.get_current_user_in_room(room_id)
unhandled_users = set(users_with_profile) - self.initially_handled_users
yield self.store.add_profiles_to_user_dir(
room_id, {
user_id: users_with_profile[user_id] for user_id in unhandled_users
}
)
self.initially_handled_users |= unhandled_users
@defer.inlineCallbacks
def _do_initial_spam(self):
# TODO: pull from current delta stream_id
new_pos = self.store.get_room_max_stream_ordering()
yield self.store.delete_all_from_user_dir()
room_ids = yield self.store.get_all_rooms()
for room_id in room_ids:
yield self._handle_room(room_id)
self.initially_handled_users = None
yield self.store.update_user_directory_stream_pos(new_pos)
@defer.inlineCallbacks
def _handle_new_user(self, room_id, user_id, profile):
row = yield self.store.get_user_in_directory(user_id)
if row:
return
yield self.store.add_profiles_to_user_dir(room_id, {user_id: profile})
def _handle_remove_user(self, room_id, user_id):
row = yield self.store.get_user_in_directory(user_id)
if not row or row["room_id"] != room_id:
return
# TODO: Make this faster?
rooms = yield self.store.get_rooms_for_user(user_id)
for room_id in rooms:
is_public = yield self.store.is_room_world_readable_or_publicly_joinable(
room_id
)
if is_public:
return
yield self.store.remove_from_user_dir(user_id)
@defer.inlineCallbacks
def _handle_deltas(self, deltas):
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"]
if typ == EventTypes.RoomHistoryVisibility:
change = yield self._get_key_change(
prev_event_id, event_id,
key_name="history_visibility",
public_value="world_readable",
)
if change is None:
continue
users_with_profile = yield self.state.get_current_user_in_room(room_id)
for user_id, profile in users_with_profile.iteritems():
if change:
yield self._handle_new_user(room_id, user_id, profile)
else:
yield self._handle_remove_user(room_id, user_id)
elif typ == EventTypes.JoinRules:
change = yield self._get_key_change(
prev_event_id, event_id,
key_name="join_rules",
public_value=JoinRules.PUBLIC,
)
if change is None:
continue
users_with_profile = yield self.state.get_current_user_in_room(room_id)
for user_id, profile in users_with_profile.iteritems():
if change:
yield self._handle_new_user(room_id, user_id, profile)
else:
yield self._handle_remove_user(room_id, user_id)
elif typ == EventTypes.Member:
change = yield self._get_key_change(
prev_event_id, event_id,
key_name="membership",
public_value=Membership.JOIN,
)
if change is None:
continue
if change:
event = yield self.store.get_event(event_id)
profile = ProfileInfo(
avatar_url=event.content.get("avatar_url"),
display_name=event.content.get("displayname"),
)
yield self._handle_new_user(room_id, state_key, profile)
else:
yield self._handle_remove_user(room_id, state_key)
@defer.inlineCallbacks
def _get_key_change(self, prev_event_id, event_id, key_name, public_value):
prev_event = None
event = None
if prev_event_id:
prev_event = yield self.store.get_event(prev_event_id, allow_none=True)
if event_id:
event = yield self.store.get_event(event_id, allow_none=True)
if not event and not prev_event:
defer.returnValue(None)
prev_hist_vis = None
hist_vis = None
if prev_event:
prev_hist_vis = prev_event.content.get(key_name, None)
if event:
hist_vis = event.content.get(key_name, None)
if hist_vis == public_value and prev_hist_vis != public_value:
defer.returnValue(True)
elif hist_vis != public_value and prev_hist_vis == public_value:
defer.returnValue(False)
else:
defer.returnValue(None)
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