anonymousland-synapse/synapse/handlers/room.py
Erik Johnston 590fbbef03 Add config to create guest account on 3pid invite
Currently, when a 3pid invite request is sent to an identity server, it
includes a provisioned guest access token. This allows the link in the,
say, invite email to include the guest access token ensuring that the
same account is used each time the link is clicked.

This flow has a number of flaws, including when using different servers
or servers that have guest access disabled.

For now, we keep this implementation but hide it behind a config option
until a better flow is implemented.
2016-03-14 15:50:40 +00:00

1154 lines
39 KiB
Python

# -*- coding: utf-8 -*-
# Copyright 2014 - 2016 OpenMarket Ltd
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""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
from synapse.api.constants import (
EventTypes, Membership, JoinRules, RoomCreationPreset,
)
from synapse.api.errors import AuthError, StoreError, SynapseError, Codes
from synapse.util import stringutils, unwrapFirstError
from synapse.util.logcontext import preserve_context_over_fn
from signedjson.sign import verify_signed_json
from signedjson.key import decode_verify_key_bytes
from collections import OrderedDict
from unpaddedbase64 import decode_base64
import logging
import math
import string
logger = logging.getLogger(__name__)
id_server_scheme = "https://"
def user_left_room(distributor, user, room_id):
return preserve_context_over_fn(
distributor.fire,
"user_left_room", user=user, room_id=room_id
)
def user_joined_room(distributor, user, room_id):
return preserve_context_over_fn(
distributor.fire,
"user_joined_room", user=user, room_id=room_id
)
class RoomCreationHandler(BaseHandler):
PRESETS_DICT = {
RoomCreationPreset.PRIVATE_CHAT: {
"join_rules": JoinRules.INVITE,
"history_visibility": "shared",
"original_invitees_have_ops": False,
},
RoomCreationPreset.TRUSTED_PRIVATE_CHAT: {
"join_rules": JoinRules.INVITE,
"history_visibility": "shared",
"original_invitees_have_ops": True,
},
RoomCreationPreset.PUBLIC_CHAT: {
"join_rules": JoinRules.PUBLIC,
"history_visibility": "shared",
"original_invitees_have_ops": False,
},
}
@defer.inlineCallbacks
def create_room(self, requester, config):
""" Creates a new room.
Args:
requester (Requester): The user who requested the room creation.
config (dict) : A dict of configuration options.
Returns:
The new room ID.
Raises:
SynapseError if the room ID couldn't be stored, or something went
horribly wrong.
"""
user_id = requester.user.to_string()
self.ratelimit(requester)
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(
config["room_alias_name"],
self.hs.hostname,
)
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,))
invite_3pid_list = config.get("invite_3pid", [])
is_public = config.get("visibility", None) == "public"
# 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.")
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],
)
preset_config = config.get(
"preset",
RoomCreationPreset.PUBLIC_CHAT
if is_public
else RoomCreationPreset.PRIVATE_CHAT
)
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", {})
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,
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,
)
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,
requester.user,
medium,
address,
id_server,
requester,
txn_id=None,
)
result = {"room_id": room_id}
if room_alias:
result["room_alias"] = room_alias.to_string()
yield directory_handler.send_room_alias_update_event(
requester, user_id, room_id
)
defer.returnValue(result)
@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
):
def create(etype, content, **kwargs):
e = {
"type": etype,
"content": content,
}
e.update(event_keys)
e.update(kwargs)
return e
@defer.inlineCallbacks
def send(etype, content, **kwargs):
event = create(etype, content, **kwargs)
yield msg_handler.create_and_send_nonmember_event(
creator,
event,
ratelimit=False
)
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(
etype=EventTypes.Create,
content=creation_content,
)
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": {
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,
}
if config["original_invitees_have_ops"]:
for invitee in invite_list:
power_level_content["users"][invitee] = 100
yield send(
etype=EventTypes.PowerLevels,
content=power_level_content,
)
if room_alias and (EventTypes.CanonicalAlias, '') not in initial_state:
yield send(
etype=EventTypes.CanonicalAlias,
content={"alias": room_alias.to_string()},
)
if (EventTypes.JoinRules, '') not in initial_state:
yield send(
etype=EventTypes.JoinRules,
content={"join_rule": config["join_rules"]},
)
if (EventTypes.RoomHistoryVisibility, '') not in initial_state:
yield send(
etype=EventTypes.RoomHistoryVisibility,
content={"history_visibility": config["history_visibility"]}
)
for (etype, state_key), content in initial_state.items():
yield send(
etype=etype,
state_key=state_key,
content=content,
)
class RoomMemberHandler(BaseHandler):
# 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")
@defer.inlineCallbacks
def get_room_members(self, room_id):
users = yield self.store.get_users_in_room(room_id)
defer.returnValue([UserID.from_string(u) for u in users])
@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):
if localusers is not None:
localusers.add(member)
else:
if remotedomains is not None:
remotedomains.add(member.domain)
@defer.inlineCallbacks
def update_membership(
self,
requester,
target,
room_id,
action,
txn_id=None,
remote_room_hosts=None,
third_party_signed=None,
ratelimit=True,
):
effective_membership_state = action
if action in ["kick", "unban"]:
effective_membership_state = "leave"
elif action == "forget":
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
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(),
# 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,
)
if action == "forget":
yield self.forget(requester.user, room_id)
@defer.inlineCallbacks
def send_membership_event(
self,
requester,
event,
context,
remote_room_hosts=None,
ratelimit=True,
):
"""
Change the membership status of a user in a room.
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.
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.
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)
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"
if event.membership == Membership.JOIN:
if requester.is_guest and not self._can_guest_join(context.current_state):
# 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(
context,
(self.get_inviter(event.state_key, context.current_state)),
remote_room_hosts,
)
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)
if not is_host_in_room:
# perhaps we've been invited
inviter = self.get_inviter(target_user.to_string(), context.current_state)
if not inviter:
raise SynapseError(404, "Not a known room")
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.
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:
yield self.handle_new_client_event(
requester,
event,
context,
extra_users=[target_user],
ratelimit=ratelimit,
)
prev_member_event = context.current_state.get(
(EventTypes.Member, target_user.to_string()),
None
)
if event.membership == Membership.JOIN:
if not prev_member_event or prev_member_event.membership != Membership.JOIN:
# 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:
user_left_room(self.distributor, target_user, room_id)
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):
# 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)
if is_host_in_room:
return False, room_hosts
if inviter and not self.hs.is_mine(inviter):
room_hosts.append(inviter.domain)
return True, room_hosts
@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.
"""
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"]
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
@defer.inlineCallbacks
def get_joined_rooms_for_user(self, user):
"""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(),
)
# 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)
@defer.inlineCallbacks
def do_3pid_invite(
self,
room_id,
inviter,
medium,
address,
id_server,
requester,
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",
txn_id=txn_id,
)
else:
yield self._make_and_store_3pid_invite(
requester,
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,),
{
"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)
defer.returnValue(data["mxid"])
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
@defer.inlineCallbacks
def _make_and_store_3pid_invite(
self,
requester,
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 = (
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
)
)
msg_handler = self.hs.get_handlers().message_handler
yield msg_handler.create_and_send_nonmember_event(
requester,
{
"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"],
},
"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(),
})
data = yield self.hs.get_simple_http_client().post_urlencoded_get_json(
is_url,
invite_config
)
# 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))
def forget(self, user, room_id):
return self.store.forget(user.to_string(), room_id)
class RoomListHandler(BaseHandler):
@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)
if not aliases:
defer.returnValue(None)
state = yield self.state_handler.get_current_state(room_id)
result = {"aliases": aliases, "room_id": room_id}
name_event = state.get((EventTypes.Name, ""), None)
if name_event:
name = name_event.content.get("name", None)
if name:
result["name"] = name
topic_event = state.get((EventTypes.Topic, ""), None)
if topic_event:
topic = topic_event.content.get("topic", None)
if topic:
result["topic"] = topic
canonical_event = state.get((EventTypes.CanonicalAlias, ""), None)
if canonical_event:
canonical_alias = canonical_event.content.get("alias", None)
if canonical_alias:
result["canonical_alias"] = canonical_alias
visibility_event = state.get((EventTypes.RoomHistoryVisibility, ""), None)
visibility = None
if visibility_event:
visibility = visibility_event.content.get("history_visibility", None)
result["world_readable"] = visibility == "world_readable"
guest_event = state.get((EventTypes.GuestAccess, ""), None)
guest = None
if guest_event:
guest = guest_event.content.get("guest_access", None)
result["guest_can_join"] = guest == "can_join"
avatar_event = state.get(("m.room.avatar", ""), None)
if avatar_event:
avatar_url = avatar_event.content.get("url", None)
if avatar_url:
result["avatar_url"] = avatar_url
result["num_joined_members"] = sum(
1 for (event_type, _), ev in state.items()
if event_type == EventTypes.Member and ev.membership == Membership.JOIN
)
defer.returnValue(result)
result = []
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})
class RoomContextHandler(BaseHandler):
@defer.inlineCallbacks
def get_event_context(self, user, room_id, event_id, limit, is_guest):
"""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
"""
before_limit = math.floor(limit / 2.)
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."
)
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
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)
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))