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![Mark Haines](/assets/img/avatar_default.png)
synapse This is necessary for replicating the data in synapse to be visible to a separate service because presence and typing notifications aren't stored in a database so won't be visible to another process. This API can be used to either get the raw data by requesting the tables themselves or to just receive notifications for updates by following the streams meta-stream. Returns updates for each table requested a JSON array of arrays with a row for each row in the table. Each table is prefixed by a header row with the: name of the table, current stream_id position for the table, number of rows, number of columns and the names of the columns. This is followed by the rows that have been added to the server since the requester last asked. The API has a timeout and is hooked up to the notifier so that a slave can long poll for updates.
1106 lines
40 KiB
Python
1106 lines
40 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014-2016 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""This module is responsible for keeping track of presence status of local
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and remote users.
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The methods that define policy are:
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- PresenceHandler._update_states
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- PresenceHandler._handle_timeouts
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- should_notify
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"""
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from twisted.internet import defer, reactor
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from contextlib import contextmanager
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from synapse.api.errors import SynapseError
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from synapse.api.constants import PresenceState
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from synapse.storage.presence import UserPresenceState
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from synapse.util.logcontext import preserve_fn
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from synapse.util.logutils import log_function
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from synapse.util.metrics import Measure
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from synapse.util.wheel_timer import WheelTimer
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from synapse.types import UserID
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import synapse.metrics
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from ._base import BaseHandler
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import logging
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logger = logging.getLogger(__name__)
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metrics = synapse.metrics.get_metrics_for(__name__)
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notified_presence_counter = metrics.register_counter("notified_presence")
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federation_presence_out_counter = metrics.register_counter("federation_presence_out")
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presence_updates_counter = metrics.register_counter("presence_updates")
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timers_fired_counter = metrics.register_counter("timers_fired")
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federation_presence_counter = metrics.register_counter("federation_presence")
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bump_active_time_counter = metrics.register_counter("bump_active_time")
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# If a user was last active in the last LAST_ACTIVE_GRANULARITY, consider them
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# "currently_active"
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LAST_ACTIVE_GRANULARITY = 60 * 1000
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# How long to wait until a new /events or /sync request before assuming
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# the client has gone.
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SYNC_ONLINE_TIMEOUT = 30 * 1000
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# How long to wait before marking the user as idle. Compared against last active
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IDLE_TIMER = 5 * 60 * 1000
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# How often we expect remote servers to resend us presence.
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FEDERATION_TIMEOUT = 30 * 60 * 1000
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# How often to resend presence to remote servers
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FEDERATION_PING_INTERVAL = 25 * 60 * 1000
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assert LAST_ACTIVE_GRANULARITY < IDLE_TIMER
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def user_presence_changed(distributor, user, statuscache):
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return distributor.fire("user_presence_changed", user, statuscache)
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def collect_presencelike_data(distributor, user, content):
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return distributor.fire("collect_presencelike_data", user, content)
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class PresenceHandler(BaseHandler):
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def __init__(self, hs):
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super(PresenceHandler, self).__init__(hs)
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self.hs = hs
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self.clock = hs.get_clock()
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self.store = hs.get_datastore()
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self.wheel_timer = WheelTimer()
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self.notifier = hs.get_notifier()
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self.federation = hs.get_replication_layer()
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self.federation.register_edu_handler(
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"m.presence", self.incoming_presence
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)
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self.federation.register_edu_handler(
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"m.presence_invite",
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lambda origin, content: self.invite_presence(
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observed_user=UserID.from_string(content["observed_user"]),
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observer_user=UserID.from_string(content["observer_user"]),
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)
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)
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self.federation.register_edu_handler(
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"m.presence_accept",
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lambda origin, content: self.accept_presence(
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observed_user=UserID.from_string(content["observed_user"]),
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observer_user=UserID.from_string(content["observer_user"]),
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)
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)
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self.federation.register_edu_handler(
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"m.presence_deny",
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lambda origin, content: self.deny_presence(
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observed_user=UserID.from_string(content["observed_user"]),
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observer_user=UserID.from_string(content["observer_user"]),
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)
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)
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distributor = hs.get_distributor()
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distributor.observe("user_joined_room", self.user_joined_room)
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active_presence = self.store.take_presence_startup_info()
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# A dictionary of the current state of users. This is prefilled with
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# non-offline presence from the DB. We should fetch from the DB if
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# we can't find a users presence in here.
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self.user_to_current_state = {
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state.user_id: state
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for state in active_presence
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}
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now = self.clock.time_msec()
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for state in active_presence:
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self.wheel_timer.insert(
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now=now,
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obj=state.user_id,
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then=state.last_active_ts + IDLE_TIMER,
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)
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self.wheel_timer.insert(
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now=now,
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obj=state.user_id,
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then=state.last_user_sync_ts + SYNC_ONLINE_TIMEOUT,
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)
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if self.hs.is_mine_id(state.user_id):
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self.wheel_timer.insert(
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now=now,
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obj=state.user_id,
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then=state.last_federation_update_ts + FEDERATION_PING_INTERVAL,
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)
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else:
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self.wheel_timer.insert(
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now=now,
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obj=state.user_id,
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then=state.last_federation_update_ts + FEDERATION_TIMEOUT,
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)
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# Set of users who have presence in the `user_to_current_state` that
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# have not yet been persisted
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self.unpersisted_users_changes = set()
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reactor.addSystemEventTrigger("before", "shutdown", self._on_shutdown)
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self.serial_to_user = {}
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self._next_serial = 1
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# Keeps track of the number of *ongoing* syncs. While this is non zero
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# a user will never go offline.
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self.user_to_num_current_syncs = {}
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# Start a LoopingCall in 30s that fires every 5s.
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# The initial delay is to allow disconnected clients a chance to
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# reconnect before we treat them as offline.
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self.clock.call_later(
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0 * 1000,
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self.clock.looping_call,
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self._handle_timeouts,
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5000,
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)
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metrics.register_callback("wheel_timer_size", lambda: len(self.wheel_timer))
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@defer.inlineCallbacks
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def _on_shutdown(self):
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"""Gets called when shutting down. This lets us persist any updates that
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we haven't yet persisted, e.g. updates that only changes some internal
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timers. This allows changes to persist across startup without having to
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persist every single change.
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If this does not run it simply means that some of the timers will fire
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earlier than they should when synapse is restarted. This affect of this
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is some spurious presence changes that will self-correct.
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"""
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logger.info(
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"Performing _on_shutdown. Persiting %d unpersisted changes",
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len(self.user_to_current_state)
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)
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if self.unpersisted_users_changes:
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yield self.store.update_presence([
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self.user_to_current_state[user_id]
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for user_id in self.unpersisted_users_changes
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])
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logger.info("Finished _on_shutdown")
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@defer.inlineCallbacks
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def _update_states(self, new_states):
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"""Updates presence of users. Sets the appropriate timeouts. Pokes
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the notifier and federation if and only if the changed presence state
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should be sent to clients/servers.
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"""
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now = self.clock.time_msec()
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with Measure(self.clock, "presence_update_states"):
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# NOTE: We purposefully don't yield between now and when we've
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# calculated what we want to do with the new states, to avoid races.
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to_notify = {} # Changes we want to notify everyone about
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to_federation_ping = {} # These need sending keep-alives
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for new_state in new_states:
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user_id = new_state.user_id
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# Its fine to not hit the database here, as the only thing not in
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# the current state cache are OFFLINE states, where the only field
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# of interest is last_active which is safe enough to assume is 0
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# here.
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prev_state = self.user_to_current_state.get(
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user_id, UserPresenceState.default(user_id)
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)
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new_state, should_notify, should_ping = handle_update(
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prev_state, new_state,
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is_mine=self.hs.is_mine_id(user_id),
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wheel_timer=self.wheel_timer,
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now=now
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)
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self.user_to_current_state[user_id] = new_state
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if should_notify:
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to_notify[user_id] = new_state
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elif should_ping:
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to_federation_ping[user_id] = new_state
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# TODO: We should probably ensure there are no races hereafter
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presence_updates_counter.inc_by(len(new_states))
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if to_notify:
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notified_presence_counter.inc_by(len(to_notify))
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yield self._persist_and_notify(to_notify.values())
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self.unpersisted_users_changes |= set(s.user_id for s in new_states)
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self.unpersisted_users_changes -= set(to_notify.keys())
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to_federation_ping = {
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user_id: state for user_id, state in to_federation_ping.items()
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if user_id not in to_notify
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}
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if to_federation_ping:
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federation_presence_out_counter.inc_by(len(to_federation_ping))
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_, _, hosts_to_states = yield self._get_interested_parties(
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to_federation_ping.values()
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)
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self._push_to_remotes(hosts_to_states)
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def _handle_timeouts(self):
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"""Checks the presence of users that have timed out and updates as
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appropriate.
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"""
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now = self.clock.time_msec()
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with Measure(self.clock, "presence_handle_timeouts"):
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# Fetch the list of users that *may* have timed out. Things may have
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# changed since the timeout was set, so we won't necessarily have to
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# take any action.
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users_to_check = self.wheel_timer.fetch(now)
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states = [
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self.user_to_current_state.get(
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user_id, UserPresenceState.default(user_id)
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)
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for user_id in set(users_to_check)
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]
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timers_fired_counter.inc_by(len(states))
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changes = handle_timeouts(
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states,
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is_mine_fn=self.hs.is_mine_id,
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user_to_num_current_syncs=self.user_to_num_current_syncs,
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now=now,
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)
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preserve_fn(self._update_states)(changes)
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@defer.inlineCallbacks
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def bump_presence_active_time(self, user):
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"""We've seen the user do something that indicates they're interacting
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with the app.
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"""
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user_id = user.to_string()
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bump_active_time_counter.inc()
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prev_state = yield self.current_state_for_user(user_id)
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new_fields = {
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"last_active_ts": self.clock.time_msec(),
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}
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if prev_state.state == PresenceState.UNAVAILABLE:
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new_fields["state"] = PresenceState.ONLINE
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yield self._update_states([prev_state.copy_and_replace(**new_fields)])
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@defer.inlineCallbacks
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def user_syncing(self, user_id, affect_presence=True):
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"""Returns a context manager that should surround any stream requests
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from the user.
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This allows us to keep track of who is currently streaming and who isn't
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without having to have timers outside of this module to avoid flickering
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when users disconnect/reconnect.
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Args:
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user_id (str)
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affect_presence (bool): If false this function will be a no-op.
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Useful for streams that are not associated with an actual
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client that is being used by a user.
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"""
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if affect_presence:
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curr_sync = self.user_to_num_current_syncs.get(user_id, 0)
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self.user_to_num_current_syncs[user_id] = curr_sync + 1
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prev_state = yield self.current_state_for_user(user_id)
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if prev_state.state == PresenceState.OFFLINE:
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# If they're currently offline then bring them online, otherwise
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# just update the last sync times.
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yield self._update_states([prev_state.copy_and_replace(
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state=PresenceState.ONLINE,
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last_active_ts=self.clock.time_msec(),
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last_user_sync_ts=self.clock.time_msec(),
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)])
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else:
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yield self._update_states([prev_state.copy_and_replace(
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last_user_sync_ts=self.clock.time_msec(),
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)])
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@defer.inlineCallbacks
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def _end():
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if affect_presence:
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self.user_to_num_current_syncs[user_id] -= 1
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prev_state = yield self.current_state_for_user(user_id)
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yield self._update_states([prev_state.copy_and_replace(
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last_user_sync_ts=self.clock.time_msec(),
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)])
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@contextmanager
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def _user_syncing():
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try:
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yield
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finally:
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preserve_fn(_end)()
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defer.returnValue(_user_syncing())
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@defer.inlineCallbacks
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def current_state_for_user(self, user_id):
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"""Get the current presence state for a user.
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"""
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res = yield self.current_state_for_users([user_id])
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defer.returnValue(res[user_id])
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@defer.inlineCallbacks
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def current_state_for_users(self, user_ids):
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"""Get the current presence state for multiple users.
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Returns:
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dict: `user_id` -> `UserPresenceState`
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"""
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states = {
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user_id: self.user_to_current_state.get(user_id, None)
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for user_id in user_ids
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}
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missing = [user_id for user_id, state in states.items() if not state]
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if missing:
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# There are things not in our in memory cache. Lets pull them out of
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# the database.
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res = yield self.store.get_presence_for_users(missing)
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states.update({state.user_id: state for state in res})
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missing = [user_id for user_id, state in states.items() if not state]
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if missing:
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new = {
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user_id: UserPresenceState.default(user_id)
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for user_id in missing
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}
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states.update(new)
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self.user_to_current_state.update(new)
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defer.returnValue(states)
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@defer.inlineCallbacks
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def _get_interested_parties(self, states):
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"""Given a list of states return which entities (rooms, users, servers)
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are interested in the given states.
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Returns:
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3-tuple: `(room_ids_to_states, users_to_states, hosts_to_states)`,
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with each item being a dict of `entity_name` -> `[UserPresenceState]`
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"""
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room_ids_to_states = {}
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users_to_states = {}
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for state in states:
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events = yield self.store.get_rooms_for_user(state.user_id)
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for e in events:
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room_ids_to_states.setdefault(e.room_id, []).append(state)
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plist = yield self.store.get_presence_list_observers_accepted(state.user_id)
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for u in plist:
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users_to_states.setdefault(u, []).append(state)
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# Always notify self
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users_to_states.setdefault(state.user_id, []).append(state)
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hosts_to_states = {}
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for room_id, states in room_ids_to_states.items():
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local_states = filter(lambda s: self.hs.is_mine_id(s.user_id), states)
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if not local_states:
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continue
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hosts = yield self.store.get_joined_hosts_for_room(room_id)
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for host in hosts:
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hosts_to_states.setdefault(host, []).extend(local_states)
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for user_id, states in users_to_states.items():
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local_states = filter(lambda s: self.hs.is_mine_id(s.user_id), states)
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if not local_states:
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continue
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host = UserID.from_string(user_id).domain
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hosts_to_states.setdefault(host, []).extend(local_states)
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# TODO: de-dup hosts_to_states, as a single host might have multiple
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# of same presence
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defer.returnValue((room_ids_to_states, users_to_states, hosts_to_states))
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@defer.inlineCallbacks
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def _persist_and_notify(self, states):
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"""Persist states in the database, poke the notifier and send to
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interested remote servers
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"""
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stream_id, max_token = yield self.store.update_presence(states)
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parties = yield self._get_interested_parties(states)
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room_ids_to_states, users_to_states, hosts_to_states = parties
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self.notifier.on_new_event(
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"presence_key", stream_id, rooms=room_ids_to_states.keys(),
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users=[UserID.from_string(u) for u in users_to_states.keys()]
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)
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self._push_to_remotes(hosts_to_states)
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def _push_to_remotes(self, hosts_to_states):
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"""Sends state updates to remote servers.
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Args:
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hosts_to_states (dict): Mapping `server_name` -> `[UserPresenceState]`
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"""
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now = self.clock.time_msec()
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for host, states in hosts_to_states.items():
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self.federation.send_edu(
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destination=host,
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edu_type="m.presence",
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content={
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"push": [
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_format_user_presence_state(state, now)
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for state in states
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]
|
|
}
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def incoming_presence(self, origin, content):
|
|
"""Called when we receive a `m.presence` EDU from a remote server.
|
|
"""
|
|
now = self.clock.time_msec()
|
|
updates = []
|
|
for push in content.get("push", []):
|
|
# A "push" contains a list of presence that we are probably interested
|
|
# in.
|
|
# TODO: Actually check if we're interested, rather than blindly
|
|
# accepting presence updates.
|
|
user_id = push.get("user_id", None)
|
|
if not user_id:
|
|
logger.info(
|
|
"Got presence update from %r with no 'user_id': %r",
|
|
origin, push,
|
|
)
|
|
continue
|
|
|
|
presence_state = push.get("presence", None)
|
|
if not presence_state:
|
|
logger.info(
|
|
"Got presence update from %r with no 'presence_state': %r",
|
|
origin, push,
|
|
)
|
|
continue
|
|
|
|
new_fields = {
|
|
"state": presence_state,
|
|
"last_federation_update_ts": now,
|
|
}
|
|
|
|
last_active_ago = push.get("last_active_ago", None)
|
|
if last_active_ago is not None:
|
|
new_fields["last_active_ts"] = now - last_active_ago
|
|
|
|
new_fields["status_msg"] = push.get("status_msg", None)
|
|
new_fields["currently_active"] = push.get("currently_active", False)
|
|
|
|
prev_state = yield self.current_state_for_user(user_id)
|
|
updates.append(prev_state.copy_and_replace(**new_fields))
|
|
|
|
if updates:
|
|
federation_presence_counter.inc_by(len(updates))
|
|
yield self._update_states(updates)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_state(self, target_user, as_event=False):
|
|
results = yield self.get_states(
|
|
[target_user.to_string()],
|
|
as_event=as_event,
|
|
)
|
|
|
|
defer.returnValue(results[0])
|
|
|
|
@defer.inlineCallbacks
|
|
def get_states(self, target_user_ids, as_event=False):
|
|
"""Get the presence state for users.
|
|
|
|
Args:
|
|
target_user_ids (list)
|
|
as_event (bool): Whether to format it as a client event or not.
|
|
|
|
Returns:
|
|
list
|
|
"""
|
|
|
|
updates = yield self.current_state_for_users(target_user_ids)
|
|
updates = updates.values()
|
|
|
|
for user_id in set(target_user_ids) - set(u.user_id for u in updates):
|
|
updates.append(UserPresenceState.default(user_id))
|
|
|
|
now = self.clock.time_msec()
|
|
if as_event:
|
|
defer.returnValue([
|
|
{
|
|
"type": "m.presence",
|
|
"content": _format_user_presence_state(state, now),
|
|
}
|
|
for state in updates
|
|
])
|
|
else:
|
|
defer.returnValue([
|
|
_format_user_presence_state(state, now) for state in updates
|
|
])
|
|
|
|
@defer.inlineCallbacks
|
|
def set_state(self, target_user, state):
|
|
"""Set the presence state of the user.
|
|
"""
|
|
status_msg = state.get("status_msg", None)
|
|
presence = state["presence"]
|
|
|
|
valid_presence = (
|
|
PresenceState.ONLINE, PresenceState.UNAVAILABLE, PresenceState.OFFLINE
|
|
)
|
|
if presence not in valid_presence:
|
|
raise SynapseError(400, "Invalid presence state")
|
|
|
|
user_id = target_user.to_string()
|
|
|
|
prev_state = yield self.current_state_for_user(user_id)
|
|
|
|
new_fields = {
|
|
"state": presence,
|
|
"status_msg": status_msg if presence != PresenceState.OFFLINE else None
|
|
}
|
|
|
|
if presence == PresenceState.ONLINE:
|
|
new_fields["last_active_ts"] = self.clock.time_msec()
|
|
|
|
yield self._update_states([prev_state.copy_and_replace(**new_fields)])
|
|
|
|
@defer.inlineCallbacks
|
|
def user_joined_room(self, user, room_id):
|
|
"""Called (via the distributor) when a user joins a room. This funciton
|
|
sends presence updates to servers, either:
|
|
1. the joining user is a local user and we send their presence to
|
|
all servers in the room.
|
|
2. the joining user is a remote user and so we send presence for all
|
|
local users in the room.
|
|
"""
|
|
# We only need to send presence to servers that don't have it yet. We
|
|
# don't need to send to local clients here, as that is done as part
|
|
# of the event stream/sync.
|
|
# TODO: Only send to servers not already in the room.
|
|
if self.hs.is_mine(user):
|
|
state = yield self.current_state_for_user(user.to_string())
|
|
|
|
hosts = yield self.store.get_joined_hosts_for_room(room_id)
|
|
self._push_to_remotes({host: (state,) for host in hosts})
|
|
else:
|
|
user_ids = yield self.store.get_users_in_room(room_id)
|
|
user_ids = filter(self.hs.is_mine_id, user_ids)
|
|
|
|
states = yield self.current_state_for_users(user_ids)
|
|
|
|
self._push_to_remotes({user.domain: states.values()})
|
|
|
|
@defer.inlineCallbacks
|
|
def get_presence_list(self, observer_user, accepted=None):
|
|
"""Returns the presence for all users in their presence list.
|
|
"""
|
|
if not self.hs.is_mine(observer_user):
|
|
raise SynapseError(400, "User is not hosted on this Home Server")
|
|
|
|
presence_list = yield self.store.get_presence_list(
|
|
observer_user.localpart, accepted=accepted
|
|
)
|
|
|
|
results = yield self.get_states(
|
|
target_user_ids=[row["observed_user_id"] for row in presence_list],
|
|
as_event=False,
|
|
)
|
|
|
|
is_accepted = {
|
|
row["observed_user_id"]: row["accepted"] for row in presence_list
|
|
}
|
|
|
|
for result in results:
|
|
result.update({
|
|
"accepted": is_accepted,
|
|
})
|
|
|
|
defer.returnValue(results)
|
|
|
|
@defer.inlineCallbacks
|
|
def send_presence_invite(self, observer_user, observed_user):
|
|
"""Sends a presence invite.
|
|
"""
|
|
yield self.store.add_presence_list_pending(
|
|
observer_user.localpart, observed_user.to_string()
|
|
)
|
|
|
|
if self.hs.is_mine(observed_user):
|
|
yield self.invite_presence(observed_user, observer_user)
|
|
else:
|
|
yield self.federation.send_edu(
|
|
destination=observed_user.domain,
|
|
edu_type="m.presence_invite",
|
|
content={
|
|
"observed_user": observed_user.to_string(),
|
|
"observer_user": observer_user.to_string(),
|
|
}
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def invite_presence(self, observed_user, observer_user):
|
|
"""Handles new presence invites.
|
|
"""
|
|
if not self.hs.is_mine(observed_user):
|
|
raise SynapseError(400, "User is not hosted on this Home Server")
|
|
|
|
# TODO: Don't auto accept
|
|
if self.hs.is_mine(observer_user):
|
|
yield self.accept_presence(observed_user, observer_user)
|
|
else:
|
|
self.federation.send_edu(
|
|
destination=observer_user.domain,
|
|
edu_type="m.presence_accept",
|
|
content={
|
|
"observed_user": observed_user.to_string(),
|
|
"observer_user": observer_user.to_string(),
|
|
}
|
|
)
|
|
|
|
state_dict = yield self.get_state(observed_user, as_event=False)
|
|
|
|
self.federation.send_edu(
|
|
destination=observer_user.domain,
|
|
edu_type="m.presence",
|
|
content={
|
|
"push": [state_dict]
|
|
}
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def accept_presence(self, observed_user, observer_user):
|
|
"""Handles a m.presence_accept EDU. Mark a presence invite from a
|
|
local or remote user as accepted in a local user's presence list.
|
|
Starts polling for presence updates from the local or remote user.
|
|
Args:
|
|
observed_user(UserID): The user to update in the presence list.
|
|
observer_user(UserID): The owner of the presence list to update.
|
|
"""
|
|
yield self.store.set_presence_list_accepted(
|
|
observer_user.localpart, observed_user.to_string()
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def deny_presence(self, observed_user, observer_user):
|
|
"""Handle a m.presence_deny EDU. Removes a local or remote user from a
|
|
local user's presence list.
|
|
Args:
|
|
observed_user(UserID): The local or remote user to remove from the
|
|
list.
|
|
observer_user(UserID): The local owner of the presence list.
|
|
Returns:
|
|
A Deferred.
|
|
"""
|
|
yield self.store.del_presence_list(
|
|
observer_user.localpart, observed_user.to_string()
|
|
)
|
|
|
|
# TODO(paul): Inform the user somehow?
|
|
|
|
@defer.inlineCallbacks
|
|
def drop(self, observed_user, observer_user):
|
|
"""Remove a local or remote user from a local user's presence list and
|
|
unsubscribe the local user from updates that user.
|
|
Args:
|
|
observed_user(UserId): The local or remote user to remove from the
|
|
list.
|
|
observer_user(UserId): The local owner of the presence list.
|
|
Returns:
|
|
A Deferred.
|
|
"""
|
|
if not self.hs.is_mine(observer_user):
|
|
raise SynapseError(400, "User is not hosted on this Home Server")
|
|
|
|
yield self.store.del_presence_list(
|
|
observer_user.localpart, observed_user.to_string()
|
|
)
|
|
|
|
# TODO: Inform the remote that we've dropped the presence list.
|
|
|
|
@defer.inlineCallbacks
|
|
def is_visible(self, observed_user, observer_user):
|
|
"""Returns whether a user can see another user's presence.
|
|
"""
|
|
observer_rooms = yield self.store.get_rooms_for_user(observer_user.to_string())
|
|
observed_rooms = yield self.store.get_rooms_for_user(observed_user.to_string())
|
|
|
|
observer_room_ids = set(r.room_id for r in observer_rooms)
|
|
observed_room_ids = set(r.room_id for r in observed_rooms)
|
|
|
|
if observer_room_ids & observed_room_ids:
|
|
defer.returnValue(True)
|
|
|
|
accepted_observers = yield self.store.get_presence_list_observers_accepted(
|
|
observed_user.to_string()
|
|
)
|
|
|
|
defer.returnValue(observer_user.to_string() in accepted_observers)
|
|
|
|
@defer.inlineCallbacks
|
|
def get_all_presence_updates(self, last_id, current_id):
|
|
"""
|
|
Gets a list of presence update rows from between the given stream ids.
|
|
Each row has:
|
|
- stream_id(str)
|
|
- user_id(str)
|
|
- state(str)
|
|
- last_active_ts(int)
|
|
- last_federation_update_ts(int)
|
|
- last_user_sync_ts(int)
|
|
- status_msg(int)
|
|
- currently_active(int)
|
|
"""
|
|
# TODO(markjh): replicate the unpersisted changes.
|
|
# This could use the in-memory stores for recent changes.
|
|
rows = yield self.store.get_all_presence_updates(last_id, current_id)
|
|
defer.returnValue(rows)
|
|
|
|
|
|
def should_notify(old_state, new_state):
|
|
"""Decides if a presence state change should be sent to interested parties.
|
|
"""
|
|
if old_state.status_msg != new_state.status_msg:
|
|
return True
|
|
|
|
if old_state.state == PresenceState.ONLINE:
|
|
if new_state.state != PresenceState.ONLINE:
|
|
# Always notify for online -> anything
|
|
return True
|
|
|
|
if new_state.currently_active != old_state.currently_active:
|
|
return True
|
|
|
|
if new_state.last_active_ts - old_state.last_active_ts > LAST_ACTIVE_GRANULARITY:
|
|
# Always notify for a transition where last active gets bumped.
|
|
return True
|
|
|
|
if old_state.state != new_state.state:
|
|
return True
|
|
|
|
return False
|
|
|
|
|
|
def _format_user_presence_state(state, now):
|
|
"""Convert UserPresenceState to a format that can be sent down to clients
|
|
and to other servers.
|
|
"""
|
|
content = {
|
|
"presence": state.state,
|
|
"user_id": state.user_id,
|
|
}
|
|
if state.last_active_ts:
|
|
content["last_active_ago"] = now - state.last_active_ts
|
|
if state.status_msg and state.state != PresenceState.OFFLINE:
|
|
content["status_msg"] = state.status_msg
|
|
if state.state == PresenceState.ONLINE:
|
|
content["currently_active"] = state.currently_active
|
|
|
|
return content
|
|
|
|
|
|
class PresenceEventSource(object):
|
|
def __init__(self, hs):
|
|
self.hs = hs
|
|
self.clock = hs.get_clock()
|
|
self.store = hs.get_datastore()
|
|
|
|
@defer.inlineCallbacks
|
|
@log_function
|
|
def get_new_events(self, user, from_key, room_ids=None, include_offline=True,
|
|
**kwargs):
|
|
# The process for getting presence events are:
|
|
# 1. Get the rooms the user is in.
|
|
# 2. Get the list of user in the rooms.
|
|
# 3. Get the list of users that are in the user's presence list.
|
|
# 4. If there is a from_key set, cross reference the list of users
|
|
# with the `presence_stream_cache` to see which ones we actually
|
|
# need to check.
|
|
# 5. Load current state for the users.
|
|
#
|
|
# We don't try and limit the presence updates by the current token, as
|
|
# sending down the rare duplicate is not a concern.
|
|
|
|
with Measure(self.clock, "presence.get_new_events"):
|
|
user_id = user.to_string()
|
|
if from_key is not None:
|
|
from_key = int(from_key)
|
|
room_ids = room_ids or []
|
|
|
|
presence = self.hs.get_handlers().presence_handler
|
|
stream_change_cache = self.store.presence_stream_cache
|
|
|
|
if not room_ids:
|
|
rooms = yield self.store.get_rooms_for_user(user_id)
|
|
room_ids = set(e.room_id for e in rooms)
|
|
else:
|
|
room_ids = set(room_ids)
|
|
|
|
max_token = self.store.get_current_presence_token()
|
|
|
|
plist = yield self.store.get_presence_list_accepted(user.localpart)
|
|
friends = set(row["observed_user_id"] for row in plist)
|
|
friends.add(user_id) # So that we receive our own presence
|
|
|
|
user_ids_changed = set()
|
|
changed = None
|
|
if from_key and max_token - from_key < 100:
|
|
# For small deltas, its quicker to get all changes and then
|
|
# work out if we share a room or they're in our presence list
|
|
changed = stream_change_cache.get_all_entities_changed(from_key)
|
|
|
|
# get_all_entities_changed can return None
|
|
if changed is not None:
|
|
for other_user_id in changed:
|
|
if other_user_id in friends:
|
|
user_ids_changed.add(other_user_id)
|
|
continue
|
|
other_rooms = yield self.store.get_rooms_for_user(other_user_id)
|
|
if room_ids.intersection(e.room_id for e in other_rooms):
|
|
user_ids_changed.add(other_user_id)
|
|
continue
|
|
else:
|
|
# Too many possible updates. Find all users we can see and check
|
|
# if any of them have changed.
|
|
user_ids_to_check = set()
|
|
for room_id in room_ids:
|
|
users = yield self.store.get_users_in_room(room_id)
|
|
user_ids_to_check.update(users)
|
|
|
|
user_ids_to_check.update(friends)
|
|
|
|
# Always include yourself. Only really matters for when the user is
|
|
# not in any rooms, but still.
|
|
user_ids_to_check.add(user_id)
|
|
|
|
if from_key:
|
|
user_ids_changed = stream_change_cache.get_entities_changed(
|
|
user_ids_to_check, from_key,
|
|
)
|
|
else:
|
|
user_ids_changed = user_ids_to_check
|
|
|
|
updates = yield presence.current_state_for_users(user_ids_changed)
|
|
|
|
now = self.clock.time_msec()
|
|
|
|
defer.returnValue(([
|
|
{
|
|
"type": "m.presence",
|
|
"content": _format_user_presence_state(s, now),
|
|
}
|
|
for s in updates.values()
|
|
if include_offline or s.state != PresenceState.OFFLINE
|
|
], max_token))
|
|
|
|
def get_current_key(self):
|
|
return self.store.get_current_presence_token()
|
|
|
|
def get_pagination_rows(self, user, pagination_config, key):
|
|
return self.get_new_events(user, from_key=None, include_offline=False)
|
|
|
|
|
|
def handle_timeouts(user_states, is_mine_fn, user_to_num_current_syncs, now):
|
|
"""Checks the presence of users that have timed out and updates as
|
|
appropriate.
|
|
|
|
Args:
|
|
user_states(list): List of UserPresenceState's to check.
|
|
is_mine_fn (fn): Function that returns if a user_id is ours
|
|
user_to_num_current_syncs (dict): Mapping of user_id to number of currently
|
|
active syncs.
|
|
now (int): Current time in ms.
|
|
|
|
Returns:
|
|
List of UserPresenceState updates
|
|
"""
|
|
changes = {} # Actual changes we need to notify people about
|
|
|
|
for state in user_states:
|
|
is_mine = is_mine_fn(state.user_id)
|
|
|
|
new_state = handle_timeout(state, is_mine, user_to_num_current_syncs, now)
|
|
if new_state:
|
|
changes[state.user_id] = new_state
|
|
|
|
return changes.values()
|
|
|
|
|
|
def handle_timeout(state, is_mine, user_to_num_current_syncs, now):
|
|
"""Checks the presence of the user to see if any of the timers have elapsed
|
|
|
|
Args:
|
|
state (UserPresenceState)
|
|
is_mine (bool): Whether the user is ours
|
|
user_to_num_current_syncs (dict): Mapping of user_id to number of currently
|
|
active syncs.
|
|
now (int): Current time in ms.
|
|
|
|
Returns:
|
|
A UserPresenceState update or None if no update.
|
|
"""
|
|
if state.state == PresenceState.OFFLINE:
|
|
# No timeouts are associated with offline states.
|
|
return None
|
|
|
|
changed = False
|
|
user_id = state.user_id
|
|
|
|
if is_mine:
|
|
if state.state == PresenceState.ONLINE:
|
|
if now - state.last_active_ts > IDLE_TIMER:
|
|
# Currently online, but last activity ages ago so auto
|
|
# idle
|
|
state = state.copy_and_replace(
|
|
state=PresenceState.UNAVAILABLE,
|
|
)
|
|
changed = True
|
|
elif now - state.last_active_ts > LAST_ACTIVE_GRANULARITY:
|
|
# So that we send down a notification that we've
|
|
# stopped updating.
|
|
changed = True
|
|
|
|
if now - state.last_federation_update_ts > FEDERATION_PING_INTERVAL:
|
|
# Need to send ping to other servers to ensure they don't
|
|
# timeout and set us to offline
|
|
changed = True
|
|
|
|
# If there are have been no sync for a while (and none ongoing),
|
|
# set presence to offline
|
|
if not user_to_num_current_syncs.get(user_id, 0):
|
|
if now - state.last_user_sync_ts > SYNC_ONLINE_TIMEOUT:
|
|
state = state.copy_and_replace(
|
|
state=PresenceState.OFFLINE,
|
|
status_msg=None,
|
|
)
|
|
changed = True
|
|
else:
|
|
# We expect to be poked occaisonally by the other side.
|
|
# This is to protect against forgetful/buggy servers, so that
|
|
# no one gets stuck online forever.
|
|
if now - state.last_federation_update_ts > FEDERATION_TIMEOUT:
|
|
# The other side seems to have disappeared.
|
|
state = state.copy_and_replace(
|
|
state=PresenceState.OFFLINE,
|
|
status_msg=None,
|
|
)
|
|
changed = True
|
|
|
|
return state if changed else None
|
|
|
|
|
|
def handle_update(prev_state, new_state, is_mine, wheel_timer, now):
|
|
"""Given a presence update:
|
|
1. Add any appropriate timers.
|
|
2. Check if we should notify anyone.
|
|
|
|
Args:
|
|
prev_state (UserPresenceState)
|
|
new_state (UserPresenceState)
|
|
is_mine (bool): Whether the user is ours
|
|
wheel_timer (WheelTimer)
|
|
now (int): Time now in ms
|
|
|
|
Returns:
|
|
3-tuple: `(new_state, persist_and_notify, federation_ping)` where:
|
|
- new_state: is the state to actually persist
|
|
- persist_and_notify (bool): whether to persist and notify people
|
|
- federation_ping (bool): whether we should send a ping over federation
|
|
"""
|
|
user_id = new_state.user_id
|
|
|
|
persist_and_notify = False
|
|
federation_ping = False
|
|
|
|
# If the users are ours then we want to set up a bunch of timers
|
|
# to time things out.
|
|
if is_mine:
|
|
if new_state.state == PresenceState.ONLINE:
|
|
# Idle timer
|
|
wheel_timer.insert(
|
|
now=now,
|
|
obj=user_id,
|
|
then=new_state.last_active_ts + IDLE_TIMER
|
|
)
|
|
|
|
active = now - new_state.last_active_ts < LAST_ACTIVE_GRANULARITY
|
|
new_state = new_state.copy_and_replace(
|
|
currently_active=active,
|
|
)
|
|
|
|
if active:
|
|
wheel_timer.insert(
|
|
now=now,
|
|
obj=user_id,
|
|
then=new_state.last_active_ts + LAST_ACTIVE_GRANULARITY
|
|
)
|
|
|
|
if new_state.state != PresenceState.OFFLINE:
|
|
# User has stopped syncing
|
|
wheel_timer.insert(
|
|
now=now,
|
|
obj=user_id,
|
|
then=new_state.last_user_sync_ts + SYNC_ONLINE_TIMEOUT
|
|
)
|
|
|
|
last_federate = new_state.last_federation_update_ts
|
|
if now - last_federate > FEDERATION_PING_INTERVAL:
|
|
# Been a while since we've poked remote servers
|
|
new_state = new_state.copy_and_replace(
|
|
last_federation_update_ts=now,
|
|
)
|
|
federation_ping = True
|
|
|
|
else:
|
|
wheel_timer.insert(
|
|
now=now,
|
|
obj=user_id,
|
|
then=new_state.last_federation_update_ts + FEDERATION_TIMEOUT
|
|
)
|
|
|
|
# Check whether the change was something worth notifying about
|
|
if should_notify(prev_state, new_state):
|
|
new_state = new_state.copy_and_replace(
|
|
last_federation_update_ts=now,
|
|
)
|
|
persist_and_notify = True
|
|
|
|
return new_state, persist_and_notify, federation_ping
|