MatrixSynapse/synapse/handlers/room.py

589 lines
20 KiB
Python

# -*- coding: utf-8 -*-
# Copyright 2014, 2015 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
from synapse.api.constants import EventTypes, Membership, JoinRules
from synapse.api.errors import StoreError, SynapseError
from synapse.util import stringutils
from synapse.util.async import run_on_reactor
from synapse.events.utils import serialize_event
import logging
logger = logging.getLogger(__name__)
class RoomCreationHandler(BaseHandler):
@defer.inlineCallbacks
def create_room(self, user_id, room_id, config):
""" Creates a new room.
Args:
user_id (str): The ID of the user creating the new room.
room_id (str): The proposed ID for the new room. Can be None, in
which case one will be created for you.
config (dict) : A dict of configuration options.
Returns:
The new room ID.
Raises:
SynapseError if the room ID was taken, couldn't be stored, or
something went horribly wrong.
"""
self.ratelimit(user_id)
if "room_alias_name" in config:
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,))
is_public = config.get("visibility", None) == "public"
if room_id:
# Ensure room_id is the correct type
room_id_obj = RoomID.from_string(room_id)
if not self.hs.is_mine(room_id_obj):
raise SynapseError(400, "Room id must be local")
yield self.store.store_room(
room_id=room_id,
room_creator_user_id=user_id,
is_public=is_public
)
else:
# 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],
)
user = UserID.from_string(user_id)
creation_events = self._create_events_for_new_room(
user, room_id, is_public=is_public
)
msg_handler = self.hs.get_handlers().message_handler
for event in creation_events:
yield msg_handler.create_and_send_event(event)
if "name" in config:
name = config["name"]
yield msg_handler.create_and_send_event({
"type": EventTypes.Name,
"room_id": room_id,
"sender": user_id,
"state_key": "",
"content": {"name": name},
})
if "topic" in config:
topic = config["topic"]
yield msg_handler.create_and_send_event({
"type": EventTypes.Topic,
"room_id": room_id,
"sender": user_id,
"state_key": "",
"content": {"topic": topic},
})
for invitee in invite_list:
yield msg_handler.create_and_send_event({
"type": EventTypes.Member,
"state_key": invitee,
"room_id": room_id,
"sender": user_id,
"content": {"membership": Membership.INVITE},
})
result = {"room_id": room_id}
if room_alias:
result["room_alias"] = room_alias.to_string()
yield directory_handler.send_room_alias_update_event(
user_id, room_id
)
defer.returnValue(result)
def _create_events_for_new_room(self, creator, room_id, is_public=False):
creator_id = creator.to_string()
event_keys = {
"room_id": room_id,
"sender": creator_id,
"state_key": "",
}
def create(etype, content, **kwargs):
e = {
"type": etype,
"content": content,
}
e.update(event_keys)
e.update(kwargs)
return e
creation_event = create(
etype=EventTypes.Create,
content={"creator": creator.to_string()},
)
join_event = create(
etype=EventTypes.Member,
state_key=creator_id,
content={
"membership": Membership.JOIN,
},
)
power_levels_event = create(
etype=EventTypes.PowerLevels,
content={
"users": {
creator.to_string(): 100,
},
"users_default": 0,
"events": {
EventTypes.Name: 100,
EventTypes.PowerLevels: 100,
},
"events_default": 0,
"state_default": 50,
"ban": 50,
"kick": 50,
"redact": 50
},
)
join_rule = JoinRules.PUBLIC if is_public else JoinRules.INVITE
join_rules_event = create(
etype=EventTypes.JoinRules,
content={"join_rule": join_rule},
)
return [
creation_event,
join_event,
power_levels_event,
join_rules_event,
]
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 get_room_members_as_pagination_chunk(self, room_id=None, user_id=None,
limit=0, start_tok=None,
end_tok=None):
"""Retrieve a list of room members in the room.
Args:
room_id (str): The room to get the member list for.
user_id (str): The ID of the user making the request.
limit (int): The max number of members to return.
start_tok (str): Optional. The start token if known.
end_tok (str): Optional. The end token if known.
Returns:
dict: A Pagination streamable dict.
Raises:
SynapseError if something goes wrong.
"""
yield self.auth.check_joined_room(room_id, user_id)
member_list = yield self.store.get_room_members(room_id=room_id)
time_now = self.clock.time_msec()
event_list = [
serialize_event(entry, time_now)
for entry in member_list
]
chunk_data = {
"start": "START", # FIXME (erikj): START is no longer valid
"end": "END",
"chunk": event_list
}
# TODO honor Pagination stream params
# TODO snapshot this list to return on subsequent requests when
# paginating
defer.returnValue(chunk_data)
@defer.inlineCallbacks
def get_room_member(self, room_id, member_user_id, auth_user_id):
"""Retrieve a room member from a room.
Args:
room_id : The room the member is in.
member_user_id : The member's user ID
auth_user_id : The user ID of the user making this request.
Returns:
The room member, or None if this member does not exist.
Raises:
SynapseError if something goes wrong.
"""
yield self.auth.check_joined_room(room_id, auth_user_id)
member = yield self.store.get_room_member(user_id=member_user_id,
room_id=room_id)
defer.returnValue(member)
@defer.inlineCallbacks
def change_membership(self, event, context, do_auth=True):
""" Change the membership status of a user in a room.
Args:
event (SynapseEvent): The membership event
Raises:
SynapseError if there was a problem changing the membership.
"""
target_user_id = event.state_key
prev_state = context.current_state.get(
(EventTypes.Member, target_user_id),
None
)
room_id = event.room_id
# If we're trying to join a room then we have to do this differently
# if this HS is not currently in the room, i.e. we have to do the
# invite/join dance.
if event.membership == Membership.JOIN:
yield self._do_join(event, context, do_auth=do_auth)
else:
# This is not a JOIN, so we can handle it normally.
# FIXME: This isn't idempotency.
if prev_state and prev_state.membership == event.membership:
# double same action, treat this event as a NOOP.
defer.returnValue({})
return
yield self._do_local_membership_update(
event,
membership=event.content["membership"],
context=context,
do_auth=do_auth,
)
if prev_state and prev_state.membership == Membership.JOIN:
user = UserID.from_string(event.user_id)
self.distributor.fire(
"user_left_room", user=user, room_id=event.room_id
)
defer.returnValue({"room_id": room_id})
@defer.inlineCallbacks
def join_room_alias(self, joinee, room_alias, do_auth=True, content={}):
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"]
hosts = mapping["servers"]
if not hosts:
raise SynapseError(404, "No known servers")
host = hosts[0]
# If event doesn't include a display name, add one.
yield self.distributor.fire(
"collect_presencelike_data", joinee, content
)
content.update({"membership": Membership.JOIN})
builder = self.event_builder_factory.new({
"type": EventTypes.Member,
"state_key": joinee.to_string(),
"room_id": room_id,
"sender": joinee.to_string(),
"membership": Membership.JOIN,
"content": content,
})
event, context = yield self._create_new_client_event(builder)
yield self._do_join(event, context, room_host=host, do_auth=True)
defer.returnValue({"room_id": room_id})
@defer.inlineCallbacks
def _do_join(self, event, context, room_host=None, do_auth=True):
joinee = UserID.from_string(event.state_key)
# room_id = RoomID.from_string(event.room_id, self.hs)
room_id = event.room_id
# XXX: 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.
is_host_in_room = yield self.auth.check_host_in_room(
event.room_id,
self.hs.hostname
)
if not is_host_in_room:
# is *anyone* in the room?
room_member_keys = [
v for (k, v) in context.current_state.keys() if (
k == "m.room.member"
)
]
if len(room_member_keys) == 0:
# has the room been created so we can join it?
create_event = context.current_state.get(("m.room.create", ""))
if create_event:
is_host_in_room = True
if is_host_in_room:
should_do_dance = False
elif room_host: # TODO: Shouldn't this be remote_room_host?
should_do_dance = True
else:
# TODO(markjh): get prev_state from snapshot
prev_state = yield self.store.get_room_member(
joinee.to_string(), room_id
)
if prev_state and prev_state.membership == Membership.INVITE:
inviter = UserID.from_string(prev_state.user_id)
should_do_dance = not self.hs.is_mine(inviter)
room_host = inviter.domain
else:
# return the same error as join_room_alias does
raise SynapseError(404, "No known servers")
if should_do_dance:
handler = self.hs.get_handlers().federation_handler
yield handler.do_invite_join(
room_host,
room_id,
event.user_id,
event.get_dict()["content"], # FIXME To get a non-frozen dict
context
)
else:
logger.debug("Doing normal join")
yield self._do_local_membership_update(
event,
membership=event.content["membership"],
context=context,
do_auth=do_auth,
)
user = UserID.from_string(event.user_id)
yield self.distributor.fire(
"user_joined_room", user=user, room_id=room_id
)
@defer.inlineCallbacks
def _should_invite_join(self, room_id, prev_state, do_auth):
logger.debug("_should_invite_join: room_id: %s", room_id)
# XXX: 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.
# Only do an invite join dance if a) we were invited,
# b) the person inviting was from a differnt HS and c) we are
# not currently in the room
room_host = None
if prev_state and prev_state.membership == Membership.INVITE:
room = yield self.store.get_room(room_id)
inviter = UserID.from_string(
prev_state.sender
)
is_remote_invite_join = not self.hs.is_mine(inviter) and not room
room_host = inviter.domain
else:
is_remote_invite_join = False
defer.returnValue((is_remote_invite_join, room_host))
@defer.inlineCallbacks
def get_rooms_for_user(self, user, membership_list=[Membership.JOIN]):
"""Returns a list of roomids that the user has any of the given
membership states in."""
rooms = yield self.store.get_rooms_for_user_where_membership_is(
user_id=user.to_string(), membership_list=membership_list
)
# 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_local_membership_update(self, event, membership, context,
do_auth):
yield run_on_reactor()
target_user = UserID.from_string(event.state_key)
yield self.handle_new_client_event(
event,
context,
extra_users=[target_user],
suppress_auth=(not do_auth),
)
class RoomListHandler(BaseHandler):
@defer.inlineCallbacks
def get_public_room_list(self):
chunk = yield self.store.get_rooms(is_public=True)
for room in chunk:
joined_users = yield self.store.get_users_in_room(
room_id=room["room_id"],
)
room["num_joined_members"] = len(joined_users)
# FIXME (erikj): START is no longer a valid value
defer.returnValue({"start": "START", "end": "END", "chunk": chunk})
class RoomEventSource(object):
def __init__(self, hs):
self.store = hs.get_datastore()
@defer.inlineCallbacks
def get_new_events_for_user(self, user, from_key, limit):
# We just ignore the key for now.
to_key = yield self.get_current_key()
events, end_key = yield self.store.get_room_events_stream(
user_id=user.to_string(),
from_key=from_key,
to_key=to_key,
room_id=None,
limit=limit,
)
defer.returnValue((events, end_key))
def get_current_key(self):
return self.store.get_room_events_max_id()
@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,
with_feedback=True
)
defer.returnValue((events, next_key))