726 lines
24 KiB
Python
726 lines
24 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 matrix.org
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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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from twisted.internet import defer
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from synapse.api.errors import SynapseError, AuthError
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from synapse.api.constants import PresenceState
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from synapse.api.streams import StreamData
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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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# TODO(paul): Maybe there's one of these I can steal from somewhere
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def partition(l, func):
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"""Partition the list by the result of func applied to each element."""
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ret = {}
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for x in l:
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key = func(x)
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if key not in ret:
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ret[key] = []
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ret[key].append(x)
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return ret
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def partitionbool(l, func):
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def boolfunc(x):
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return bool(func(x))
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ret = partition(l, boolfunc)
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return ret.get(True, []), ret.get(False, [])
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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.homeserver = hs
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self.clock = hs.get_clock()
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distributor = hs.get_distributor()
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distributor.observe("registered_user", self.registered_user)
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distributor.observe(
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"started_user_eventstream", self.started_user_eventstream
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)
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distributor.observe(
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"stopped_user_eventstream", self.stopped_user_eventstream
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)
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distributor.observe("user_joined_room",
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self.user_joined_room
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)
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distributor.declare("collect_presencelike_data")
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distributor.declare("changed_presencelike_data")
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distributor.observe(
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"changed_presencelike_data", self.changed_presencelike_data
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)
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self.distributor = distributor
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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=hs.parse_userid(content["observed_user"]),
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observer_user=hs.parse_userid(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=hs.parse_userid(content["observed_user"]),
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observer_user=hs.parse_userid(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=hs.parse_userid(content["observed_user"]),
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observer_user=hs.parse_userid(content["observer_user"]),
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)
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)
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# IN-MEMORY store, mapping local userparts to sets of local users to
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# be informed of state changes.
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self._local_pushmap = {}
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# map local users to sets of remote /domain names/ who are interested
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# in them
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self._remote_sendmap = {}
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# map remote users to sets of local users who're interested in them
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self._remote_recvmap = {}
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# map any user to a UserPresenceCache
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self._user_cachemap = {}
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self._user_cachemap_latest_serial = 0
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def _get_or_make_usercache(self, user):
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"""If the cache entry doesn't exist, initialise a new one."""
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if user not in self._user_cachemap:
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self._user_cachemap[user] = UserPresenceCache()
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return self._user_cachemap[user]
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def _get_or_offline_usercache(self, user):
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"""If the cache entry doesn't exist, return an OFFLINE one but do not
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store it into the cache."""
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if user in self._user_cachemap:
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return self._user_cachemap[user]
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else:
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statuscache = UserPresenceCache()
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statuscache.update({"state": PresenceState.OFFLINE}, user)
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return statuscache
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def registered_user(self, user):
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self.store.create_presence(user.localpart)
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@defer.inlineCallbacks
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def is_presence_visible(self, observer_user, observed_user):
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assert(observed_user.is_mine)
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if observer_user == observed_user:
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defer.returnValue(True)
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allowed_by_subscription = yield self.store.is_presence_visible(
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observed_localpart=observed_user.localpart,
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observer_userid=observer_user.to_string(),
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)
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if allowed_by_subscription:
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defer.returnValue(True)
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# TODO(paul): Check same channel
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defer.returnValue(False)
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@defer.inlineCallbacks
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def get_state(self, target_user, auth_user):
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if target_user.is_mine:
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visible = yield self.is_presence_visible(observer_user=auth_user,
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observed_user=target_user
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)
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if visible:
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state = yield self.store.get_presence_state(
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target_user.localpart
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)
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else:
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raise SynapseError(404, "Presence information not visible")
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else:
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# TODO(paul): Have remote server send us permissions set
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state = self._get_or_offline_usercache(target_user).get_state()
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if "mtime" in state:
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state["mtime_age"] = self.clock.time_msec() - state.pop("mtime")
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defer.returnValue(state)
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@defer.inlineCallbacks
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def set_state(self, target_user, auth_user, state):
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if not target_user.is_mine:
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raise SynapseError(400, "User is not hosted on this Home Server")
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if target_user != auth_user:
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raise AuthError(400, "Cannot set another user's displayname")
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# TODO(paul): Sanity-check 'state'
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if "status_msg" not in state:
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state["status_msg"] = None
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for k in state.keys():
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if k not in ("state", "status_msg"):
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raise SynapseError(
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400, "Unexpected presence state key '%s'" % (k,)
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)
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logger.debug("Updating presence state of %s to %s",
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target_user.localpart, state["state"])
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state_to_store = dict(state)
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yield defer.DeferredList([
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self.store.set_presence_state(
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target_user.localpart, state_to_store
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),
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self.distributor.fire(
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"collect_presencelike_data", target_user, state
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),
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])
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state["mtime"] = self.clock.time_msec()
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now_online = state["state"] != PresenceState.OFFLINE
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was_polling = target_user in self._user_cachemap
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if now_online and not was_polling:
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self.start_polling_presence(target_user, state=state)
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elif not now_online and was_polling:
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self.stop_polling_presence(target_user)
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# TODO(paul): perform a presence push as part of start/stop poll so
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# we don't have to do this all the time
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self.changed_presencelike_data(target_user, state)
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if not now_online:
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del self._user_cachemap[target_user]
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def changed_presencelike_data(self, user, state):
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statuscache = self._get_or_make_usercache(user)
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self._user_cachemap_latest_serial += 1
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statuscache.update(state, serial=self._user_cachemap_latest_serial)
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self.push_presence(user, statuscache=statuscache)
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def started_user_eventstream(self, user):
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# TODO(paul): Use "last online" state
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self.set_state(user, user, {"state": PresenceState.ONLINE})
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def stopped_user_eventstream(self, user):
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# TODO(paul): Save current state as "last online" state
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self.set_state(user, user, {"state": PresenceState.OFFLINE})
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@defer.inlineCallbacks
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def user_joined_room(self, user, room_id):
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localusers = set()
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remotedomains = set()
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rm_handler = self.homeserver.get_handlers().room_member_handler
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yield rm_handler.fetch_room_distributions_into(room_id,
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localusers=localusers, remotedomains=remotedomains,
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ignore_user=user)
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if user.is_mine:
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yield self._send_presence_to_distribution(srcuser=user,
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localusers=localusers, remotedomains=remotedomains,
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statuscache=self._get_or_offline_usercache(user),
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)
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for srcuser in localusers:
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yield self._send_presence(srcuser=srcuser, destuser=user,
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statuscache=self._get_or_offline_usercache(srcuser),
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)
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@defer.inlineCallbacks
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def send_invite(self, observer_user, observed_user):
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if not observer_user.is_mine:
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raise SynapseError(400, "User is not hosted on this Home Server")
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yield self.store.add_presence_list_pending(
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observer_user.localpart, observed_user.to_string()
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)
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if observed_user.is_mine:
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yield self.invite_presence(observed_user, observer_user)
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else:
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yield self.federation.send_edu(
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destination=observed_user.domain,
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edu_type="m.presence_invite",
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content={
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"observed_user": observed_user.to_string(),
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"observer_user": observer_user.to_string(),
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}
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)
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@defer.inlineCallbacks
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def _should_accept_invite(self, observed_user, observer_user):
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if not observed_user.is_mine:
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defer.returnValue(False)
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row = yield self.store.has_presence_state(observed_user.localpart)
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if not row:
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defer.returnValue(False)
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# TODO(paul): Eventually we'll ask the user's permission for this
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# before accepting. For now just accept any invite request
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defer.returnValue(True)
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@defer.inlineCallbacks
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def invite_presence(self, observed_user, observer_user):
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accept = yield self._should_accept_invite(observed_user, observer_user)
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if accept:
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yield self.store.allow_presence_visible(
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observed_user.localpart, observer_user.to_string()
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)
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if observer_user.is_mine:
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if accept:
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yield self.accept_presence(observed_user, observer_user)
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else:
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yield self.deny_presence(observed_user, observer_user)
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else:
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edu_type = "m.presence_accept" if accept else "m.presence_deny"
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yield self.federation.send_edu(
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destination=observer_user.domain,
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edu_type=edu_type,
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content={
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"observed_user": observed_user.to_string(),
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"observer_user": observer_user.to_string(),
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}
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)
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@defer.inlineCallbacks
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def accept_presence(self, observed_user, observer_user):
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yield self.store.set_presence_list_accepted(
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observer_user.localpart, observed_user.to_string()
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)
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self.start_polling_presence(observer_user, target_user=observed_user)
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@defer.inlineCallbacks
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def deny_presence(self, observed_user, observer_user):
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yield self.store.del_presence_list(
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observer_user.localpart, observed_user.to_string()
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)
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# TODO(paul): Inform the user somehow?
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@defer.inlineCallbacks
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def drop(self, observed_user, observer_user):
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if not observer_user.is_mine:
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raise SynapseError(400, "User is not hosted on this Home Server")
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yield self.store.del_presence_list(
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observer_user.localpart, observed_user.to_string()
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)
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self.stop_polling_presence(observer_user, target_user=observed_user)
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@defer.inlineCallbacks
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def get_presence_list(self, observer_user, accepted=None):
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if not observer_user.is_mine:
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raise SynapseError(400, "User is not hosted on this Home Server")
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presence = yield self.store.get_presence_list(
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observer_user.localpart, accepted=accepted
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)
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for p in presence:
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observed_user = self.hs.parse_userid(p.pop("observed_user_id"))
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p["observed_user"] = observed_user
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p.update(self._get_or_offline_usercache(observed_user).get_state())
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if "mtime" in p:
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p["mtime_age"] = self.clock.time_msec() - p.pop("mtime")
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defer.returnValue(presence)
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@defer.inlineCallbacks
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def start_polling_presence(self, user, target_user=None, state=None):
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logger.debug("Start polling for presence from %s", user)
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if target_user:
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target_users = [target_user]
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else:
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presence = yield self.store.get_presence_list(
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user.localpart, accepted=True
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)
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target_users = [
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self.hs.parse_userid(x["observed_user_id"]) for x in presence
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]
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if state is None:
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state = yield self.store.get_presence_state(user.localpart)
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localusers, remoteusers = partitionbool(
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target_users,
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lambda u: u.is_mine
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)
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for target_user in localusers:
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self._start_polling_local(user, target_user)
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deferreds = []
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remoteusers_by_domain = partition(remoteusers, lambda u: u.domain)
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for domain in remoteusers_by_domain:
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remoteusers = remoteusers_by_domain[domain]
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deferreds.append(self._start_polling_remote(
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user, domain, remoteusers
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))
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yield defer.DeferredList(deferreds)
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def _start_polling_local(self, user, target_user):
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target_localpart = target_user.localpart
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if not self.is_presence_visible(observer_user=user,
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observed_user=target_user):
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return
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if target_localpart not in self._local_pushmap:
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self._local_pushmap[target_localpart] = set()
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self._local_pushmap[target_localpart].add(user)
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self.push_update_to_clients(
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observer_user=user,
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observed_user=target_user,
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statuscache=self._get_or_offline_usercache(target_user),
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)
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def _start_polling_remote(self, user, domain, remoteusers):
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for u in remoteusers:
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if u not in self._remote_recvmap:
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self._remote_recvmap[u] = set()
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self._remote_recvmap[u].add(user)
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return self.federation.send_edu(
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destination=domain,
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edu_type="m.presence",
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content={"poll": [u.to_string() for u in remoteusers]}
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)
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def stop_polling_presence(self, user, target_user=None):
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logger.debug("Stop polling for presence from %s", user)
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if not target_user or target_user.is_mine:
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self._stop_polling_local(user, target_user=target_user)
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deferreds = []
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if target_user:
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raise NotImplementedError("TODO: remove one user")
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remoteusers = [u for u in self._remote_recvmap
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if user in self._remote_recvmap[u]]
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remoteusers_by_domain = partition(remoteusers, lambda u: u.domain)
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for domain in remoteusers_by_domain:
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remoteusers = remoteusers_by_domain[domain]
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deferreds.append(
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self._stop_polling_remote(user, domain, remoteusers)
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)
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return defer.DeferredList(deferreds)
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def _stop_polling_local(self, user, target_user):
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for localpart in self._local_pushmap.keys():
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if target_user and localpart != target_user.localpart:
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continue
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if user in self._local_pushmap[localpart]:
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self._local_pushmap[localpart].remove(user)
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if not self._local_pushmap[localpart]:
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del self._local_pushmap[localpart]
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def _stop_polling_remote(self, user, domain, remoteusers):
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for u in remoteusers:
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self._remote_recvmap[u].remove(user)
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if not self._remote_recvmap[u]:
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del self._remote_recvmap[u]
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return self.federation.send_edu(
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destination=domain,
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edu_type="m.presence",
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content={"unpoll": [u.to_string() for u in remoteusers]}
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)
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@defer.inlineCallbacks
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def push_presence(self, user, statuscache):
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assert(user.is_mine)
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logger.debug("Pushing presence update from %s", user)
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localusers = set(self._local_pushmap.get(user.localpart, set()))
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remotedomains = set(self._remote_sendmap.get(user.localpart, set()))
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# Reflect users' status changes back to themselves, so UIs look nice
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# and also user is informed of server-forced pushes
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localusers.add(user)
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rm_handler = self.homeserver.get_handlers().room_member_handler
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room_ids = yield rm_handler.get_rooms_for_user(user)
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for room_id in room_ids:
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yield rm_handler.fetch_room_distributions_into(
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room_id, localusers=localusers, remotedomains=remotedomains,
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ignore_user=user,
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)
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if not localusers and not remotedomains:
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defer.returnValue(None)
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yield self._send_presence_to_distribution(user,
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localusers=localusers, remotedomains=remotedomains,
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statuscache=statuscache
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)
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def _send_presence(self, srcuser, destuser, statuscache):
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if destuser.is_mine:
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self.push_update_to_clients(
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observer_user=destuser,
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observed_user=srcuser,
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statuscache=statuscache)
|
|
return defer.succeed(None)
|
|
else:
|
|
return self._push_presence_remote(srcuser, destuser.domain,
|
|
state=statuscache.get_state()
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def _send_presence_to_distribution(self, srcuser, localusers=set(),
|
|
remotedomains=set(), statuscache=None):
|
|
|
|
for u in localusers:
|
|
logger.debug(" | push to local user %s", u)
|
|
self.push_update_to_clients(
|
|
observer_user=u,
|
|
observed_user=srcuser,
|
|
statuscache=statuscache,
|
|
)
|
|
|
|
deferreds = []
|
|
for domain in remotedomains:
|
|
logger.debug(" | push to remote domain %s", domain)
|
|
deferreds.append(self._push_presence_remote(srcuser, domain,
|
|
state=statuscache.get_state())
|
|
)
|
|
|
|
yield defer.DeferredList(deferreds)
|
|
|
|
@defer.inlineCallbacks
|
|
def _push_presence_remote(self, user, destination, state=None):
|
|
if state is None:
|
|
state = yield self.store.get_presence_state(user.localpart)
|
|
|
|
yield self.distributor.fire(
|
|
"collect_presencelike_data", user, state
|
|
)
|
|
|
|
if "mtime" in state:
|
|
state = dict(state)
|
|
state["mtime_age"] = self.clock.time_msec() - state.pop("mtime")
|
|
|
|
yield self.federation.send_edu(
|
|
destination=destination,
|
|
edu_type="m.presence",
|
|
content={
|
|
"push": [
|
|
dict(user_id=user.to_string(), **state),
|
|
],
|
|
}
|
|
)
|
|
|
|
@defer.inlineCallbacks
|
|
def incoming_presence(self, origin, content):
|
|
deferreds = []
|
|
|
|
for push in content.get("push", []):
|
|
user = self.hs.parse_userid(push["user_id"])
|
|
|
|
logger.debug("Incoming presence update from %s", user)
|
|
|
|
observers = set(self._remote_recvmap.get(user, set()))
|
|
|
|
rm_handler = self.homeserver.get_handlers().room_member_handler
|
|
room_ids = yield rm_handler.get_rooms_for_user(user)
|
|
|
|
for room_id in room_ids:
|
|
yield rm_handler.fetch_room_distributions_into(
|
|
room_id, localusers=observers, ignore_user=user
|
|
)
|
|
|
|
if not observers:
|
|
break
|
|
|
|
state = dict(push)
|
|
del state["user_id"]
|
|
|
|
if "mtime_age" in state:
|
|
state["mtime"] = self.clock.time_msec() - state.pop("mtime_age")
|
|
|
|
statuscache = self._get_or_make_usercache(user)
|
|
|
|
self._user_cachemap_latest_serial += 1
|
|
statuscache.update(state, serial=self._user_cachemap_latest_serial)
|
|
|
|
for observer_user in observers:
|
|
self.push_update_to_clients(
|
|
observer_user=observer_user,
|
|
observed_user=user,
|
|
statuscache=statuscache,
|
|
)
|
|
|
|
if state["state"] == PresenceState.OFFLINE:
|
|
del self._user_cachemap[user]
|
|
|
|
for poll in content.get("poll", []):
|
|
user = self.hs.parse_userid(poll)
|
|
|
|
if not user.is_mine:
|
|
continue
|
|
|
|
# TODO(paul) permissions checks
|
|
|
|
if not user in self._remote_sendmap:
|
|
self._remote_sendmap[user] = set()
|
|
|
|
self._remote_sendmap[user].add(origin)
|
|
|
|
deferreds.append(self._push_presence_remote(user, origin))
|
|
|
|
for unpoll in content.get("unpoll", []):
|
|
user = self.hs.parse_userid(unpoll)
|
|
|
|
if not user.is_mine:
|
|
continue
|
|
|
|
if user in self._remote_sendmap:
|
|
self._remote_sendmap[user].remove(origin)
|
|
|
|
if not self._remote_sendmap[user]:
|
|
del self._remote_sendmap[user]
|
|
|
|
yield defer.DeferredList(deferreds)
|
|
|
|
def push_update_to_clients(self, observer_user, observed_user,
|
|
statuscache):
|
|
state = statuscache.make_event(user=observed_user, clock=self.clock)
|
|
|
|
self.notifier.on_new_user_event(
|
|
observer_user.to_string(),
|
|
event_data=statuscache.make_event(
|
|
user=observed_user,
|
|
clock=self.clock
|
|
),
|
|
stream_type=PresenceStreamData,
|
|
store_id=statuscache.serial
|
|
)
|
|
|
|
|
|
class PresenceStreamData(StreamData):
|
|
def __init__(self, hs):
|
|
super(PresenceStreamData, self).__init__(hs)
|
|
self.presence = hs.get_handlers().presence_handler
|
|
|
|
def get_rows(self, user_id, from_key, to_key, limit):
|
|
cachemap = self.presence._user_cachemap
|
|
|
|
# TODO(paul): limit, and filter by visibility
|
|
updates = [(k, cachemap[k]) for k in cachemap
|
|
if from_key < cachemap[k].serial <= to_key]
|
|
|
|
if updates:
|
|
clock = self.presence.clock
|
|
|
|
latest_serial = max([x[1].serial for x in updates])
|
|
data = [x[1].make_event(user=x[0], clock=clock) for x in updates]
|
|
return ((data, latest_serial))
|
|
else:
|
|
return (([], self.presence._user_cachemap_latest_serial))
|
|
|
|
def max_token(self):
|
|
return self.presence._user_cachemap_latest_serial
|
|
|
|
PresenceStreamData.EVENT_TYPE = PresenceStreamData
|
|
|
|
|
|
class UserPresenceCache(object):
|
|
"""Store an observed user's state and status message.
|
|
|
|
Includes the update timestamp.
|
|
"""
|
|
def __init__(self):
|
|
self.state = {}
|
|
self.serial = None
|
|
|
|
def update(self, state, serial):
|
|
assert("mtime_age" not in state)
|
|
|
|
self.state.update(state)
|
|
# Delete keys that are now 'None'
|
|
for k in self.state.keys():
|
|
if self.state[k] is None:
|
|
del self.state[k]
|
|
|
|
self.serial = serial
|
|
|
|
if "status_msg" in state:
|
|
self.status_msg = state["status_msg"]
|
|
else:
|
|
self.status_msg = None
|
|
|
|
def get_state(self):
|
|
# clone it so caller can't break our cache
|
|
return dict(self.state)
|
|
|
|
def make_event(self, user, clock):
|
|
content = self.get_state()
|
|
content["user_id"] = user.to_string()
|
|
|
|
if "mtime" in content:
|
|
content["mtime_age"] = clock.time_msec() - content.pop("mtime")
|
|
|
|
return {"type": "m.presence", "content": content}
|