anonymousland-synapse/synapse/handlers/room.py

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# -*- coding: utf-8 -*-
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# Copyright 2014 - 2016 OpenMarket Ltd
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#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
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"""Contains functions for performing events on rooms."""
from twisted.internet import defer
from ._base import BaseHandler
from synapse.types import UserID, RoomAlias, RoomID, RoomStreamToken, Requester
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from synapse.api.constants import (
EventTypes, Membership, JoinRules, RoomCreationPreset,
)
from synapse.api.errors import AuthError, StoreError, SynapseError, Codes
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from synapse.util import stringutils, unwrapFirstError
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from synapse.util.logcontext import preserve_context_over_fn
from synapse.util.caches.response_cache import ResponseCache
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from signedjson.sign import verify_signed_json
from signedjson.key import decode_verify_key_bytes
from collections import OrderedDict
from unpaddedbase64 import decode_base64
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import logging
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import math
import string
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logger = logging.getLogger(__name__)
id_server_scheme = "https://"
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def user_left_room(distributor, user, room_id):
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return preserve_context_over_fn(
distributor.fire,
"user_left_room", user=user, room_id=room_id
)
def user_joined_room(distributor, user, room_id):
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return preserve_context_over_fn(
distributor.fire,
"user_joined_room", user=user, room_id=room_id
)
class RoomCreationHandler(BaseHandler):
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PRESETS_DICT = {
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RoomCreationPreset.PRIVATE_CHAT: {
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"join_rules": JoinRules.INVITE,
"history_visibility": "shared",
"original_invitees_have_ops": False,
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},
RoomCreationPreset.TRUSTED_PRIVATE_CHAT: {
"join_rules": JoinRules.INVITE,
"history_visibility": "shared",
"original_invitees_have_ops": True,
},
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RoomCreationPreset.PUBLIC_CHAT: {
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"join_rules": JoinRules.PUBLIC,
"history_visibility": "shared",
"original_invitees_have_ops": False,
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},
}
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@defer.inlineCallbacks
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def create_room(self, requester, config):
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""" Creates a new room.
Args:
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requester (Requester): The user who requested the room creation.
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config (dict) : A dict of configuration options.
Returns:
The new room ID.
Raises:
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SynapseError if the room ID couldn't be stored, or something went
horribly wrong.
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"""
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user_id = requester.user.to_string()
self.ratelimit(requester)
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if "room_alias_name" in config:
for wchar in string.whitespace:
if wchar in config["room_alias_name"]:
raise SynapseError(400, "Invalid characters in room alias")
room_alias = RoomAlias.create(
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config["room_alias_name"],
self.hs.hostname,
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)
mapping = yield self.store.get_association_from_room_alias(
room_alias
)
if mapping:
raise SynapseError(400, "Room alias already taken")
else:
room_alias = None
invite_list = config.get("invite", [])
for i in invite_list:
try:
UserID.from_string(i)
except:
raise SynapseError(400, "Invalid user_id: %s" % (i,))
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invite_3pid_list = config.get("invite_3pid", [])
visibility = config.get("visibility", None)
is_public = visibility == "public"
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# autogen room IDs and try to create it. We may clash, so just
# try a few times till one goes through, giving up eventually.
attempts = 0
room_id = None
while attempts < 5:
try:
random_string = stringutils.random_string(18)
gen_room_id = RoomID.create(
random_string,
self.hs.hostname,
)
yield self.store.store_room(
room_id=gen_room_id.to_string(),
room_creator_user_id=user_id,
is_public=is_public
)
room_id = gen_room_id.to_string()
break
except StoreError:
attempts += 1
if not room_id:
raise StoreError(500, "Couldn't generate a room ID.")
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if room_alias:
directory_handler = self.hs.get_handlers().directory_handler
yield directory_handler.create_association(
user_id=user_id,
room_id=room_id,
room_alias=room_alias,
servers=[self.hs.hostname],
)
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preset_config = config.get(
"preset",
RoomCreationPreset.PRIVATE_CHAT
if visibility == "private"
else RoomCreationPreset.PUBLIC_CHAT
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)
raw_initial_state = config.get("initial_state", [])
initial_state = OrderedDict()
for val in raw_initial_state:
initial_state[(val["type"], val.get("state_key", ""))] = val["content"]
creation_content = config.get("creation_content", {})
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msg_handler = self.hs.get_handlers().message_handler
room_member_handler = self.hs.get_handlers().room_member_handler
yield self._send_events_for_new_room(
requester,
room_id,
msg_handler,
room_member_handler,
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preset_config=preset_config,
invite_list=invite_list,
initial_state=initial_state,
creation_content=creation_content,
room_alias=room_alias,
)
if "name" in config:
name = config["name"]
yield msg_handler.create_and_send_nonmember_event(
requester,
{
"type": EventTypes.Name,
"room_id": room_id,
"sender": user_id,
"state_key": "",
"content": {"name": name},
},
ratelimit=False)
if "topic" in config:
topic = config["topic"]
yield msg_handler.create_and_send_nonmember_event(
requester,
{
"type": EventTypes.Topic,
"room_id": room_id,
"sender": user_id,
"state_key": "",
"content": {"topic": topic},
},
ratelimit=False)
for invitee in invite_list:
yield room_member_handler.update_membership(
requester,
UserID.from_string(invitee),
room_id,
"invite",
ratelimit=False,
)
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for invite_3pid in invite_3pid_list:
id_server = invite_3pid["id_server"]
address = invite_3pid["address"]
medium = invite_3pid["medium"]
yield self.hs.get_handlers().room_member_handler.do_3pid_invite(
room_id,
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requester.user,
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medium,
address,
id_server,
requester,
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txn_id=None,
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)
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result = {"room_id": room_id}
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if room_alias:
result["room_alias"] = room_alias.to_string()
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yield directory_handler.send_room_alias_update_event(
requester, user_id, room_id
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)
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defer.returnValue(result)
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@defer.inlineCallbacks
def _send_events_for_new_room(
self,
creator, # A Requester object.
room_id,
msg_handler,
room_member_handler,
preset_config,
invite_list,
initial_state,
creation_content,
room_alias
):
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def create(etype, content, **kwargs):
e = {
"type": etype,
"content": content,
}
e.update(event_keys)
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e.update(kwargs)
return e
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@defer.inlineCallbacks
def send(etype, content, **kwargs):
event = create(etype, content, **kwargs)
yield msg_handler.create_and_send_nonmember_event(
creator,
event,
ratelimit=False
)
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config = RoomCreationHandler.PRESETS_DICT[preset_config]
creator_id = creator.user.to_string()
event_keys = {
"room_id": room_id,
"sender": creator_id,
"state_key": "",
}
creation_content.update({"creator": creator_id})
yield send(
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etype=EventTypes.Create,
content=creation_content,
)
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yield room_member_handler.update_membership(
creator,
creator.user,
room_id,
"join",
ratelimit=False,
)
if (EventTypes.PowerLevels, '') not in initial_state:
power_level_content = {
"users": {
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creator_id: 100,
},
"users_default": 0,
"events": {
EventTypes.Name: 50,
EventTypes.PowerLevels: 100,
EventTypes.RoomHistoryVisibility: 100,
EventTypes.CanonicalAlias: 50,
EventTypes.RoomAvatar: 50,
},
"events_default": 0,
"state_default": 50,
"ban": 50,
"kick": 50,
"redact": 50,
"invite": 0,
}
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if config["original_invitees_have_ops"]:
for invitee in invite_list:
power_level_content["users"][invitee] = 100
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yield send(
etype=EventTypes.PowerLevels,
content=power_level_content,
)
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if room_alias and (EventTypes.CanonicalAlias, '') not in initial_state:
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yield send(
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etype=EventTypes.CanonicalAlias,
content={"alias": room_alias.to_string()},
)
if (EventTypes.JoinRules, '') not in initial_state:
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yield send(
etype=EventTypes.JoinRules,
content={"join_rule": config["join_rules"]},
)
if (EventTypes.RoomHistoryVisibility, '') not in initial_state:
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yield send(
etype=EventTypes.RoomHistoryVisibility,
content={"history_visibility": config["history_visibility"]}
)
for (etype, state_key), content in initial_state.items():
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yield send(
etype=etype,
state_key=state_key,
content=content,
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)
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class RoomMemberHandler(BaseHandler):
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# TODO(paul): This handler currently contains a messy conflation of
# low-level API that works on UserID objects and so on, and REST-level
# API that takes ID strings and returns pagination chunks. These concerns
# ought to be separated out a lot better.
def __init__(self, hs):
super(RoomMemberHandler, self).__init__(hs)
self.clock = hs.get_clock()
self.distributor = hs.get_distributor()
self.distributor.declare("user_joined_room")
self.distributor.declare("user_left_room")
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@defer.inlineCallbacks
def get_room_members(self, room_id):
users = yield self.store.get_users_in_room(room_id)
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defer.returnValue([UserID.from_string(u) for u in users])
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@defer.inlineCallbacks
def fetch_room_distributions_into(self, room_id, localusers=None,
remotedomains=None, ignore_user=None):
"""Fetch the distribution of a room, adding elements to either
'localusers' or 'remotedomains', which should be a set() if supplied.
If ignore_user is set, ignore that user.
This function returns nothing; its result is performed by the
side-effect on the two passed sets. This allows easy accumulation of
member lists of multiple rooms at once if required.
"""
members = yield self.get_room_members(room_id)
for member in members:
if ignore_user is not None and member == ignore_user:
continue
if self.hs.is_mine(member):
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if localusers is not None:
localusers.add(member)
else:
if remotedomains is not None:
remotedomains.add(member.domain)
@defer.inlineCallbacks
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def update_membership(
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self,
requester,
target,
room_id,
action,
txn_id=None,
remote_room_hosts=None,
third_party_signed=None,
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ratelimit=True,
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):
effective_membership_state = action
if action in ["kick", "unban"]:
effective_membership_state = "leave"
if third_party_signed is not None:
replication = self.hs.get_replication_layer()
yield replication.exchange_third_party_invite(
third_party_signed["sender"],
target.to_string(),
room_id,
third_party_signed,
)
msg_handler = self.hs.get_handlers().message_handler
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content = {"membership": effective_membership_state}
if requester.is_guest:
content["kind"] = "guest"
event, context = yield msg_handler.create_event(
{
"type": EventTypes.Member,
"content": content,
"room_id": room_id,
"sender": requester.user.to_string(),
"state_key": target.to_string(),
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# For backwards compatibility:
"membership": effective_membership_state,
},
token_id=requester.access_token_id,
txn_id=txn_id,
)
old_state = context.current_state.get((EventTypes.Member, event.state_key))
old_membership = old_state.content.get("membership") if old_state else None
if action == "unban" and old_membership != "ban":
raise SynapseError(
403,
"Cannot unban user who was not banned (membership=%s)" % old_membership,
errcode=Codes.BAD_STATE
)
if old_membership == "ban" and action != "unban":
raise SynapseError(
403,
"Cannot %s user who was is banned" % (action,),
errcode=Codes.BAD_STATE
)
member_handler = self.hs.get_handlers().room_member_handler
yield member_handler.send_membership_event(
requester,
event,
context,
ratelimit=ratelimit,
remote_room_hosts=remote_room_hosts,
)
@defer.inlineCallbacks
def send_membership_event(
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self,
requester,
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event,
context,
remote_room_hosts=None,
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ratelimit=True,
):
"""
Change the membership status of a user in a room.
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Args:
requester (Requester): The local user who requested the membership
event. If None, certain checks, like whether this homeserver can
act as the sender, will be skipped.
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event (SynapseEvent): The membership event.
context: The context of the event.
is_guest (bool): Whether the sender is a guest.
room_hosts ([str]): Homeservers which are likely to already be in
the room, and could be danced with in order to join this
homeserver for the first time.
ratelimit (bool): Whether to rate limit this request.
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Raises:
SynapseError if there was a problem changing the membership.
"""
remote_room_hosts = remote_room_hosts or []
target_user = UserID.from_string(event.state_key)
room_id = event.room_id
if requester is not None:
sender = UserID.from_string(event.sender)
assert sender == requester.user, (
"Sender (%s) must be same as requester (%s)" %
(sender, requester.user)
)
assert self.hs.is_mine(sender), "Sender must be our own: %s" % (sender,)
else:
requester = Requester(target_user, None, False)
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message_handler = self.hs.get_handlers().message_handler
prev_event = message_handler.deduplicate_state_event(event, context)
if prev_event is not None:
return
action = "send"
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if event.membership == Membership.JOIN:
if requester.is_guest and not self._can_guest_join(context.current_state):
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# This should be an auth check, but guests are a local concept,
# so don't really fit into the general auth process.
raise AuthError(403, "Guest access not allowed")
do_remote_join_dance, remote_room_hosts = self._should_do_dance(
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context,
(self.get_inviter(event.state_key, context.current_state)),
remote_room_hosts,
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)
if do_remote_join_dance:
action = "remote_join"
elif event.membership == Membership.LEAVE:
is_host_in_room = self.is_host_in_room(context.current_state)
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if not is_host_in_room:
# perhaps we've been invited
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inviter = self.get_inviter(
target_user.to_string(), context.current_state
)
if not inviter:
raise SynapseError(404, "Not a known room")
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if self.hs.is_mine(inviter):
# the inviter was on our server, but has now left. Carry on
# with the normal rejection codepath.
#
# This is a bit of a hack, because the room might still be
# active on other servers.
pass
else:
# send the rejection to the inviter's HS.
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remote_room_hosts = remote_room_hosts + [inviter.domain]
action = "remote_reject"
federation_handler = self.hs.get_handlers().federation_handler
if action == "remote_join":
if len(remote_room_hosts) == 0:
raise SynapseError(404, "No known servers")
# We don't do an auth check if we are doing an invite
# join dance for now, since we're kinda implicitly checking
# that we are allowed to join when we decide whether or not we
# need to do the invite/join dance.
yield federation_handler.do_invite_join(
remote_room_hosts,
event.room_id,
event.user_id,
event.content,
)
elif action == "remote_reject":
yield federation_handler.do_remotely_reject_invite(
remote_room_hosts,
room_id,
event.user_id
)
else:
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yield self.handle_new_client_event(
requester,
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event,
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context,
extra_users=[target_user],
ratelimit=ratelimit,
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)
prev_member_event = context.current_state.get(
(EventTypes.Member, target_user.to_string()),
None
)
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if event.membership == Membership.JOIN:
if not prev_member_event or prev_member_event.membership != Membership.JOIN:
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# Only fire user_joined_room if the user has acutally joined the
# room. Don't bother if the user is just changing their profile
# info.
yield user_joined_room(self.distributor, target_user, room_id)
elif event.membership == Membership.LEAVE:
if prev_member_event and prev_member_event.membership == Membership.JOIN:
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user_left_room(self.distributor, target_user, room_id)
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def _can_guest_join(self, current_state):
"""
Returns whether a guest can join a room based on its current state.
"""
guest_access = current_state.get((EventTypes.GuestAccess, ""), None)
return (
guest_access
and guest_access.content
and "guest_access" in guest_access.content
and guest_access.content["guest_access"] == "can_join"
)
def _should_do_dance(self, context, inviter, room_hosts=None):
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# TODO: Shouldn't this be remote_room_host?
room_hosts = room_hosts or []
is_host_in_room = self.is_host_in_room(context.current_state)
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if is_host_in_room:
return False, room_hosts
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if inviter and not self.hs.is_mine(inviter):
room_hosts.append(inviter.domain)
return True, room_hosts
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@defer.inlineCallbacks
def lookup_room_alias(self, room_alias):
"""
Get the room ID associated with a room alias.
Args:
room_alias (RoomAlias): The alias to look up.
Returns:
A tuple of:
The room ID as a RoomID object.
Hosts likely to be participating in the room ([str]).
Raises:
SynapseError if room alias could not be found.
"""
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directory_handler = self.hs.get_handlers().directory_handler
mapping = yield directory_handler.get_association(room_alias)
if not mapping:
raise SynapseError(404, "No such room alias")
room_id = mapping["room_id"]
servers = mapping["servers"]
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defer.returnValue((RoomID.from_string(room_id), servers))
def get_inviter(self, user_id, current_state):
prev_state = current_state.get((EventTypes.Member, user_id))
if prev_state and prev_state.membership == Membership.INVITE:
return UserID.from_string(prev_state.user_id)
return None
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@defer.inlineCallbacks
def get_joined_rooms_for_user(self, user):
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"""Returns a list of roomids that the user has any of the given
membership states in."""
rooms = yield self.store.get_rooms_for_user(
user.to_string(),
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)
# For some reason the list of events contains duplicates
# TODO(paul): work out why because I really don't think it should
room_ids = set(r.room_id for r in rooms)
defer.returnValue(room_ids)
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@defer.inlineCallbacks
def do_3pid_invite(
self,
room_id,
inviter,
medium,
address,
id_server,
requester,
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txn_id
):
invitee = yield self._lookup_3pid(
id_server, medium, address
)
if invitee:
handler = self.hs.get_handlers().room_member_handler
yield handler.update_membership(
requester,
UserID.from_string(invitee),
room_id,
"invite",
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txn_id=txn_id,
)
else:
yield self._make_and_store_3pid_invite(
requester,
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id_server,
medium,
address,
room_id,
inviter,
txn_id=txn_id
)
@defer.inlineCallbacks
def _lookup_3pid(self, id_server, medium, address):
"""Looks up a 3pid in the passed identity server.
Args:
id_server (str): The server name (including port, if required)
of the identity server to use.
medium (str): The type of the third party identifier (e.g. "email").
address (str): The third party identifier (e.g. "foo@example.com").
Returns:
(str) the matrix ID of the 3pid, or None if it is not recognized.
"""
try:
data = yield self.hs.get_simple_http_client().get_json(
"%s%s/_matrix/identity/api/v1/lookup" % (id_server_scheme, id_server,),
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{
"medium": medium,
"address": address,
}
)
if "mxid" in data:
if "signatures" not in data:
raise AuthError(401, "No signatures on 3pid binding")
self.verify_any_signature(data, id_server)
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defer.returnValue(data["mxid"])
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except IOError as e:
logger.warn("Error from identity server lookup: %s" % (e,))
defer.returnValue(None)
@defer.inlineCallbacks
def verify_any_signature(self, data, server_hostname):
if server_hostname not in data["signatures"]:
raise AuthError(401, "No signature from server %s" % (server_hostname,))
for key_name, signature in data["signatures"][server_hostname].items():
key_data = yield self.hs.get_simple_http_client().get_json(
"%s%s/_matrix/identity/api/v1/pubkey/%s" %
(id_server_scheme, server_hostname, key_name,),
)
if "public_key" not in key_data:
raise AuthError(401, "No public key named %s from %s" %
(key_name, server_hostname,))
verify_signed_json(
data,
server_hostname,
decode_verify_key_bytes(key_name, decode_base64(key_data["public_key"]))
)
return
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@defer.inlineCallbacks
def _make_and_store_3pid_invite(
self,
requester,
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id_server,
medium,
address,
room_id,
user,
txn_id
):
room_state = yield self.hs.get_state_handler().get_current_state(room_id)
inviter_display_name = ""
inviter_avatar_url = ""
member_event = room_state.get((EventTypes.Member, user.to_string()))
if member_event:
inviter_display_name = member_event.content.get("displayname", "")
inviter_avatar_url = member_event.content.get("avatar_url", "")
canonical_room_alias = ""
canonical_alias_event = room_state.get((EventTypes.CanonicalAlias, ""))
if canonical_alias_event:
canonical_room_alias = canonical_alias_event.content.get("alias", "")
room_name = ""
room_name_event = room_state.get((EventTypes.Name, ""))
if room_name_event:
room_name = room_name_event.content.get("name", "")
room_join_rules = ""
join_rules_event = room_state.get((EventTypes.JoinRules, ""))
if join_rules_event:
room_join_rules = join_rules_event.content.get("join_rule", "")
room_avatar_url = ""
room_avatar_event = room_state.get((EventTypes.RoomAvatar, ""))
if room_avatar_event:
room_avatar_url = room_avatar_event.content.get("url", "")
token, public_keys, fallback_public_key, display_name = (
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yield self._ask_id_server_for_third_party_invite(
id_server=id_server,
medium=medium,
address=address,
room_id=room_id,
inviter_user_id=user.to_string(),
room_alias=canonical_room_alias,
room_avatar_url=room_avatar_url,
room_join_rules=room_join_rules,
room_name=room_name,
inviter_display_name=inviter_display_name,
inviter_avatar_url=inviter_avatar_url
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)
)
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msg_handler = self.hs.get_handlers().message_handler
yield msg_handler.create_and_send_nonmember_event(
requester,
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{
"type": EventTypes.ThirdPartyInvite,
"content": {
"display_name": display_name,
"public_keys": public_keys,
# For backwards compatibility:
"key_validity_url": fallback_public_key["key_validity_url"],
"public_key": fallback_public_key["public_key"],
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},
"room_id": room_id,
"sender": user.to_string(),
"state_key": token,
},
txn_id=txn_id,
)
@defer.inlineCallbacks
def _ask_id_server_for_third_party_invite(
self,
id_server,
medium,
address,
room_id,
inviter_user_id,
room_alias,
room_avatar_url,
room_join_rules,
room_name,
inviter_display_name,
inviter_avatar_url
):
"""
Asks an identity server for a third party invite.
:param id_server (str): hostname + optional port for the identity server.
:param medium (str): The literal string "email".
:param address (str): The third party address being invited.
:param room_id (str): The ID of the room to which the user is invited.
:param inviter_user_id (str): The user ID of the inviter.
:param room_alias (str): An alias for the room, for cosmetic
notifications.
:param room_avatar_url (str): The URL of the room's avatar, for cosmetic
notifications.
:param room_join_rules (str): The join rules of the email
(e.g. "public").
:param room_name (str): The m.room.name of the room.
:param inviter_display_name (str): The current display name of the
inviter.
:param inviter_avatar_url (str): The URL of the inviter's avatar.
:return: A deferred tuple containing:
token (str): The token which must be signed to prove authenticity.
public_keys ([{"public_key": str, "key_validity_url": str}]):
public_key is a base64-encoded ed25519 public key.
fallback_public_key: One element from public_keys.
display_name (str): A user-friendly name to represent the invited
user.
"""
is_url = "%s%s/_matrix/identity/api/v1/store-invite" % (
id_server_scheme, id_server,
)
invite_config = {
"medium": medium,
"address": address,
"room_id": room_id,
"room_alias": room_alias,
"room_avatar_url": room_avatar_url,
"room_join_rules": room_join_rules,
"room_name": room_name,
"sender": inviter_user_id,
"sender_display_name": inviter_display_name,
"sender_avatar_url": inviter_avatar_url,
}
if self.hs.config.invite_3pid_guest:
registration_handler = self.hs.get_handlers().registration_handler
guest_access_token = yield registration_handler.guest_access_token_for(
medium=medium,
address=address,
inviter_user_id=inviter_user_id,
)
guest_user_info = yield self.hs.get_auth().get_user_by_access_token(
guest_access_token
)
invite_config.update({
"guest_access_token": guest_access_token,
"guest_user_id": guest_user_info["user"].to_string(),
})
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data = yield self.hs.get_simple_http_client().post_urlencoded_get_json(
is_url,
invite_config
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)
# TODO: Check for success
token = data["token"]
public_keys = data.get("public_keys", [])
if "public_key" in data:
fallback_public_key = {
"public_key": data["public_key"],
"key_validity_url": "%s%s/_matrix/identity/api/v1/pubkey/isvalid" % (
id_server_scheme, id_server,
),
}
else:
fallback_public_key = public_keys[0]
if not public_keys:
public_keys.append(fallback_public_key)
display_name = data["display_name"]
defer.returnValue((token, public_keys, fallback_public_key, display_name))
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@defer.inlineCallbacks
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def forget(self, user, room_id):
user_id = user.to_string()
member = yield self.state_handler.get_current_state(
room_id=room_id,
event_type=EventTypes.Member,
state_key=user_id
)
membership = member.membership if member else None
if membership is not None and membership != Membership.LEAVE:
raise SynapseError(400, "User %s in room %s" % (
user_id, room_id
))
if membership:
yield self.store.forget(user_id, room_id)
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class RoomListHandler(BaseHandler):
def __init__(self, hs):
super(RoomListHandler, self).__init__(hs)
self.response_cache = ResponseCache()
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def get_public_room_list(self):
result = self.response_cache.get(())
if not result:
result = self.response_cache.set((), self._get_public_room_list())
return result
@defer.inlineCallbacks
def _get_public_room_list(self):
room_ids = yield self.store.get_public_room_ids()
@defer.inlineCallbacks
def handle_room(room_id):
aliases = yield self.store.get_aliases_for_room(room_id)
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# We pull each bit of state out indvidually to avoid pulling the
# full state into memory. Due to how the caching works this should
# be fairly quick, even if not originally in the cache.
def get_state(etype, state_key):
return self.state_handler.get_current_state(room_id, etype, state_key)
# Double check that this is actually a public room.
join_rules_event = yield get_state(EventTypes.JoinRules, "")
if join_rules_event:
join_rule = join_rules_event.content.get("join_rule", None)
if join_rule and join_rule != JoinRules.PUBLIC:
defer.returnValue(None)
result = {"room_id": room_id}
if aliases:
result["aliases"] = aliases
name_event = yield get_state(EventTypes.Name, "")
if name_event:
name = name_event.content.get("name", None)
if name:
result["name"] = name
topic_event = yield get_state(EventTypes.Topic, "")
if topic_event:
topic = topic_event.content.get("topic", None)
if topic:
result["topic"] = topic
canonical_event = yield get_state(EventTypes.CanonicalAlias, "")
if canonical_event:
canonical_alias = canonical_event.content.get("alias", None)
if canonical_alias:
result["canonical_alias"] = canonical_alias
visibility_event = yield get_state(EventTypes.RoomHistoryVisibility, "")
visibility = None
if visibility_event:
visibility = visibility_event.content.get("history_visibility", None)
result["world_readable"] = visibility == "world_readable"
guest_event = yield get_state(EventTypes.GuestAccess, "")
guest = None
if guest_event:
guest = guest_event.content.get("guest_access", None)
result["guest_can_join"] = guest == "can_join"
avatar_event = yield get_state("m.room.avatar", "")
if avatar_event:
avatar_url = avatar_event.content.get("url", None)
if avatar_url:
result["avatar_url"] = avatar_url
joined_users = yield self.store.get_users_in_room(room_id)
result["num_joined_members"] = len(joined_users)
defer.returnValue(result)
result = []
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for chunk in (room_ids[i:i + 10] for i in xrange(0, len(room_ids), 10)):
chunk_result = yield defer.gatherResults([
handle_room(room_id)
for room_id in chunk
], consumeErrors=True).addErrback(unwrapFirstError)
result.extend(v for v in chunk_result if v)
# FIXME (erikj): START is no longer a valid value
defer.returnValue({"start": "START", "end": "END", "chunk": result})
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class RoomContextHandler(BaseHandler):
@defer.inlineCallbacks
def get_event_context(self, user, room_id, event_id, limit, is_guest):
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"""Retrieves events, pagination tokens and state around a given event
in a room.
Args:
user (UserID)
room_id (str)
event_id (str)
limit (int): The maximum number of events to return in total
(excluding state).
Returns:
dict, or None if the event isn't found
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"""
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before_limit = math.floor(limit / 2.)
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after_limit = limit - before_limit
now_token = yield self.hs.get_event_sources().get_current_token()
def filter_evts(events):
return self._filter_events_for_client(
user.to_string(),
events,
is_peeking=is_guest)
event = yield self.store.get_event(event_id, get_prev_content=True,
allow_none=True)
if not event:
defer.returnValue(None)
return
filtered = yield(filter_evts([event]))
if not filtered:
raise AuthError(
403,
"You don't have permission to access that event."
)
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results = yield self.store.get_events_around(
room_id, event_id, before_limit, after_limit
)
results["events_before"] = yield filter_evts(results["events_before"])
results["events_after"] = yield filter_evts(results["events_after"])
results["event"] = event
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if results["events_after"]:
last_event_id = results["events_after"][-1].event_id
else:
last_event_id = event_id
state = yield self.store.get_state_for_events(
[last_event_id], None
)
results["state"] = state[last_event_id].values()
results["start"] = now_token.copy_and_replace(
"room_key", results["start"]
).to_string()
results["end"] = now_token.copy_and_replace(
"room_key", results["end"]
).to_string()
defer.returnValue(results)
class RoomEventSource(object):
def __init__(self, hs):
self.store = hs.get_datastore()
@defer.inlineCallbacks
def get_new_events(
self,
user,
from_key,
limit,
room_ids,
is_guest,
):
# We just ignore the key for now.
to_key = yield self.get_current_key()
from_token = RoomStreamToken.parse(from_key)
if from_token.topological:
logger.warn("Stream has topological part!!!! %r", from_key)
from_key = "s%s" % (from_token.stream,)
app_service = yield self.store.get_app_service_by_user_id(
user.to_string()
)
if app_service:
events, end_key = yield self.store.get_appservice_room_stream(
service=app_service,
from_key=from_key,
to_key=to_key,
limit=limit,
)
else:
room_events = yield self.store.get_membership_changes_for_user(
user.to_string(), from_key, to_key
)
room_to_events = yield self.store.get_room_events_stream_for_rooms(
room_ids=room_ids,
from_key=from_key,
to_key=to_key,
limit=limit or 10,
order='ASC',
)
events = list(room_events)
events.extend(e for evs, _ in room_to_events.values() for e in evs)
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events.sort(key=lambda e: e.internal_metadata.order)
if limit:
events[:] = events[:limit]
if events:
end_key = events[-1].internal_metadata.after
else:
end_key = to_key
defer.returnValue((events, end_key))
def get_current_key(self, direction='f'):
return self.store.get_room_events_max_id(direction)
@defer.inlineCallbacks
def get_pagination_rows(self, user, config, key):
events, next_key = yield self.store.paginate_room_events(
room_id=key,
from_key=config.from_key,
to_key=config.to_key,
direction=config.direction,
limit=config.limit,
)
defer.returnValue((events, next_key))