forked-synapse/synapse/handlers/room.py

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2014-08-12 10:10:52 -04:00
# -*- coding: utf-8 -*-
# Copyright 2014 matrix.org
#
# 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 synapse.types import UserID, RoomAlias, RoomID
from synapse.api.constants import Membership
from synapse.api.errors import RoomError, StoreError, SynapseError
from synapse.api.events.room import (
RoomTopicEvent, MessageEvent, InviteJoinEvent, RoomMemberEvent,
RoomConfigEvent
)
from synapse.api.streams.event import EventStream, MessagesStreamData
from synapse.util import stringutils
from ._base import BaseHandler
import logging
import json
logger = logging.getLogger(__name__)
class MessageHandler(BaseHandler):
def __init__(self, hs):
super(MessageHandler, self).__init__(hs)
self.hs = hs
self.clock = hs.get_clock()
self.event_factory = hs.get_event_factory()
@defer.inlineCallbacks
def get_message(self, msg_id=None, room_id=None, sender_id=None,
user_id=None):
""" Retrieve a message.
Args:
msg_id (str): The message ID to obtain.
room_id (str): The room where the message resides.
sender_id (str): The user ID of the user who sent the message.
user_id (str): The user ID of the user making this request.
Returns:
The message, or None if no message exists.
Raises:
SynapseError if something went wrong.
"""
yield self.auth.check_joined_room(room_id, user_id)
# Pull out the message from the db
msg = yield self.store.get_message(room_id=room_id,
msg_id=msg_id,
user_id=sender_id)
if msg:
defer.returnValue(msg)
defer.returnValue(None)
@defer.inlineCallbacks
def send_message(self, event=None, suppress_auth=False, stamp_event=True):
""" Send a message.
Args:
event : The message event to store.
suppress_auth (bool) : True to suppress auth for this message. This
is primarily so the home server can inject messages into rooms at
will.
stamp_event (bool) : True to stamp event content with server keys.
Raises:
SynapseError if something went wrong.
"""
if stamp_event:
event.content["hsob_ts"] = int(self.clock.time_msec())
with (yield self.room_lock.lock(event.room_id)):
if not suppress_auth:
yield self.auth.check(event, raises=True)
# store message in db
store_id = yield self.store.persist_event(event)
event.destinations = yield self.store.get_joined_hosts_for_room(
event.room_id
)
self.notifier.on_new_room_event(event, store_id)
yield self.hs.get_federation().handle_new_event(event)
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@defer.inlineCallbacks
def get_messages(self, user_id=None, room_id=None, pagin_config=None,
feedback=False):
"""Get messages in a room.
Args:
user_id (str): The user requesting messages.
room_id (str): The room they want messages from.
pagin_config (synapse.api.streams.PaginationConfig): The pagination
config rules to apply, if any.
feedback (bool): True to get compressed feedback with the messages
Returns:
dict: Pagination API results
"""
yield self.auth.check_joined_room(room_id, user_id)
data_source = [MessagesStreamData(self.hs, room_id=room_id,
feedback=feedback)]
event_stream = EventStream(user_id, data_source)
pagin_config = yield event_stream.fix_tokens(pagin_config)
data_chunk = yield event_stream.get_chunk(config=pagin_config)
defer.returnValue(data_chunk)
@defer.inlineCallbacks
def store_room_data(self, event=None, stamp_event=True):
""" Stores data for a room.
Args:
event : The room path event
stamp_event (bool) : True to stamp event content with server keys.
Raises:
SynapseError if something went wrong.
"""
with (yield self.room_lock.lock(event.room_id)):
yield self.auth.check(event, raises=True)
if stamp_event:
event.content["hsob_ts"] = int(self.clock.time_msec())
yield self.state_handler.handle_new_event(event)
# store in db
store_id = yield self.store.store_room_data(
room_id=event.room_id,
etype=event.type,
state_key=event.state_key,
content=json.dumps(event.content)
)
event.destinations = yield self.store.get_joined_hosts_for_room(
event.room_id
)
self.notifier.on_new_room_event(event, store_id)
yield self.hs.get_federation().handle_new_event(event)
@defer.inlineCallbacks
def get_room_data(self, user_id=None, room_id=None,
event_type=None, state_key="",
public_room_rules=[],
private_room_rules=["join"]):
""" Get data from a room.
Args:
event : The room path event
public_room_rules : A list of membership states the user can be in,
in order to read this data IN A PUBLIC ROOM. An empty list means
'any state'.
private_room_rules : A list of membership states the user can be
in, in order to read this data IN A PRIVATE ROOM. An empty list
means 'any state'.
Returns:
The path data content.
Raises:
SynapseError if something went wrong.
"""
if event_type == RoomTopicEvent.TYPE:
# anyone invited/joined can read the topic
private_room_rules = ["invite", "join"]
# does this room exist
room = yield self.store.get_room(room_id)
if not room:
raise RoomError(403, "Room does not exist.")
# does this user exist in this room
member = yield self.store.get_room_member(
room_id=room_id,
user_id="" if not user_id else user_id)
member_state = member.membership if member else None
if room.is_public and public_room_rules:
# make sure the user meets public room rules
if member_state not in public_room_rules:
raise RoomError(403, "Member does not meet public room rules.")
elif not room.is_public and private_room_rules:
# make sure the user meets private room rules
if member_state not in private_room_rules:
raise RoomError(
403, "Member does not meet private room rules.")
data = yield self.store.get_room_data(room_id, event_type, state_key)
defer.returnValue(data)
@defer.inlineCallbacks
def get_feedback(self, room_id=None, msg_sender_id=None, msg_id=None,
user_id=None, fb_sender_id=None, fb_type=None):
yield self.auth.check_joined_room(room_id, user_id)
# Pull out the feedback from the db
fb = yield self.store.get_feedback(
room_id=room_id, msg_id=msg_id, msg_sender_id=msg_sender_id,
fb_sender_id=fb_sender_id, fb_type=fb_type
)
if fb:
defer.returnValue(fb)
defer.returnValue(None)
@defer.inlineCallbacks
def send_feedback(self, event, stamp_event=True):
if stamp_event:
event.content["hsob_ts"] = int(self.clock.time_msec())
with (yield self.room_lock.lock(event.room_id)):
yield self.auth.check(event, raises=True)
# store message in db
store_id = yield self.store.persist_event(event)
event.destinations = yield self.store.get_joined_hosts_for_room(
event.room_id
)
yield self.hs.get_federation().handle_new_event(event)
self.notifier.on_new_room_event(event, store_id)
@defer.inlineCallbacks
def snapshot_all_rooms(self, user_id=None, pagin_config=None,
feedback=False):
"""Retrieve a snapshot of all rooms the user is invited or has joined.
This snapshot may include messages for all rooms where the user is
joined, depending on the pagination config.
Args:
user_id (str): The ID of the user making the request.
pagin_config (synapse.api.streams.PaginationConfig): The pagination
config used to determine how many messages *PER ROOM* to return.
feedback (bool): True to get feedback along with these messages.
Returns:
A list of dicts with "room_id" and "membership" keys for all rooms
the user is currently invited or joined in on. Rooms where the user
is joined on, may return a "messages" key with messages, depending
on the specified PaginationConfig.
"""
room_list = yield self.store.get_rooms_for_user_where_membership_is(
user_id=user_id,
membership_list=[Membership.INVITE, Membership.JOIN]
)
for room_info in room_list:
if room_info["membership"] != Membership.JOIN:
continue
try:
event_chunk = yield self.get_messages(
user_id=user_id,
pagin_config=pagin_config,
feedback=feedback,
room_id=room_info["room_id"]
)
room_info["messages"] = event_chunk
except:
pass
defer.returnValue(room_list)
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.
"""
if "room_alias_name" in config:
room_alias = RoomAlias.create_local(
config["room_alias_name"],
self.hs
)
mapping = yield self.store.get_association_from_room_alias(
room_alias
)
if mapping:
raise SynapseError(400, "Room alias already taken")
else:
room_alias = None
if room_id:
# Ensure room_id is the correct type
room_id_obj = RoomID.from_string(room_id, self.hs)
if not room_id_obj.is_mine:
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=config["visibility"] == "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_local(random_string, self.hs)
yield self.store.store_room(
room_id=gen_room_id.to_string(),
room_creator_user_id=user_id,
is_public=config["visibility"] == "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.")
config_event = self.event_factory.create_event(
etype=RoomConfigEvent.TYPE,
room_id=room_id,
user_id=user_id,
content=config,
)
if room_alias:
yield self.store.create_room_alias_association(
room_id=room_id,
room_alias=room_alias,
servers=[self.hs.hostname],
)
yield self.state_handler.handle_new_event(config_event)
# store_id = persist...
yield self.hs.get_federation().handle_new_event(config_event)
# self.notifier.on_new_room_event(event, store_id)
content = {"membership": Membership.JOIN}
join_event = self.event_factory.create_event(
etype=RoomMemberEvent.TYPE,
target_user_id=user_id,
room_id=room_id,
user_id=user_id,
membership=Membership.JOIN,
content=content
)
yield self.hs.get_handlers().room_member_handler.change_membership(
join_event,
broadcast_msg=True,
do_auth=False
)
result = {"room_id": room_id}
if room_alias:
result["room_alias"] = room_alias.to_string()
defer.returnValue(result)
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")
@defer.inlineCallbacks
def get_room_members(self, room_id, membership=Membership.JOIN):
hs = self.hs
memberships = yield self.store.get_room_members(
room_id=room_id, membership=membership
)
defer.returnValue([hs.parse_userid(m.user_id) for m in memberships])
@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 member.is_mine:
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)
event_list = [
entry.as_event(self.event_factory).get_dict()
for entry in member_list
]
chunk_data = {
"start": "START",
"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=None, broadcast_msg=False, do_auth=True):
""" Change the membership status of a user in a room.
Args:
event (SynapseEvent): The membership event
broadcast_msg (bool): True to inject a membership message into this
room on success.
Raises:
SynapseError if there was a problem changing the membership.
"""
#broadcast_msg = False
prev_state = yield self.store.get_room_member(
event.target_user_id, event.room_id
)
if prev_state and prev_state.membership == event.membership:
# treat this event as a NOOP.
if do_auth: # This is mainly to fix a unit test.
yield self.auth.check(event, raises=True)
defer.returnValue({})
return
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, do_auth=do_auth, broadcast_msg=broadcast_msg
)
else:
# This is not a JOIN, so we can handle it normally.
if do_auth:
yield self.auth.check(event, raises=True)
prev_state = yield self.store.get_room_member(
event.target_user_id, event.room_id
)
if prev_state and prev_state.membership == event.membership:
# double same action, treat this event as a NOOP.
defer.returnValue({})
return
yield self.state_handler.handle_new_event(event)
yield self._do_local_membership_update(
event,
membership=event.content["membership"],
broadcast_msg=broadcast_msg,
)
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]
content.update({"membership": Membership.JOIN})
new_event = self.event_factory.create_event(
etype=RoomMemberEvent.TYPE,
target_user_id=joinee.to_string(),
room_id=room_id,
user_id=joinee.to_string(),
membership=Membership.JOIN,
content=content,
)
yield self._do_join(new_event, room_host=host, do_auth=True)
defer.returnValue({"room_id": room_id})
@defer.inlineCallbacks
def _do_join(self, event, room_host=None, do_auth=True, broadcast_msg=True):
joinee = self.hs.parse_userid(event.target_user_id)
# room_id = RoomID.from_string(event.room_id, self.hs)
room_id = event.room_id
# If event doesn't include a display name, add one.
yield self._fill_out_join_content(
joinee, event.content
)
# 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.
room = yield self.store.get_room(room_id)
if room:
should_do_dance = False
elif room_host:
should_do_dance = True
else:
prev_state = yield self.store.get_room_member(
joinee.to_string(), room_id
)
if prev_state and prev_state.membership == Membership.INVITE:
room = yield self.store.get_room(room_id)
inviter = UserID.from_string(
prev_state.sender, self.hs
)
should_do_dance = not inviter.is_mine and not room
room_host = inviter.domain
else:
should_do_dance = False
# We want to do the _do_update inside the room lock.
if not should_do_dance:
logger.debug("Doing normal join")
if do_auth:
yield self.auth.check(event, raises=True)
yield self.state_handler.handle_new_event(event)
yield self._do_local_membership_update(
event,
membership=event.content["membership"],
broadcast_msg=broadcast_msg,
)
if should_do_dance:
yield self._do_invite_join_dance(
room_id=room_id,
joinee=event.user_id,
target_host=room_host,
content=event.content,
)
user = self.hs.parse_userid(event.user_id)
self.distributor.fire(
"user_joined_room", user=user, room_id=room_id
)
@defer.inlineCallbacks
def _fill_out_join_content(self, user_id, content):
# If event doesn't include a display name, add one.
profile_handler = self.hs.get_handlers().profile_handler
if "displayname" not in content:
try:
display_name = yield profile_handler.get_displayname(
user_id
)
if display_name:
content["displayname"] = display_name
except:
logger.exception("Failed to set display_name")
if "avatar_url" not in content:
try:
avatar_url = yield profile_handler.get_avatar_url(
user_id
)
if avatar_url:
content["avatar_url"] = avatar_url
except:
logger.exception("Failed to set display_name")
@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, self.hs
)
is_remote_invite_join = not inviter.is_mine 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
)
defer.returnValue([r["room_id"] for r in rooms])
@defer.inlineCallbacks
def _do_local_membership_update(self, event, membership, broadcast_msg):
# store membership
store_id = yield self.store.store_room_member(
user_id=event.target_user_id,
sender=event.user_id,
room_id=event.room_id,
content=event.content,
membership=membership
)
# Send a PDU to all hosts who have joined the room.
destinations = yield self.store.get_joined_hosts_for_room(
event.room_id
)
# If we're inviting someone, then we should also send it to that
# HS.
if membership == Membership.INVITE:
host = UserID.from_string(
event.target_user_id, self.hs
).domain
destinations.append(host)
# If we are joining a remote HS, include that.
if membership == Membership.JOIN:
host = UserID.from_string(
event.target_user_id, self.hs
).domain
destinations.append(host)
event.destinations = list(set(destinations))
yield self.hs.get_federation().handle_new_event(event)
self.notifier.on_new_room_event(event, store_id)
if broadcast_msg:
yield self._inject_membership_msg(
source=event.user_id,
target=event.target_user_id,
room_id=event.room_id,
membership=event.content["membership"]
)
@defer.inlineCallbacks
def _do_invite_join_dance(self, room_id, joinee, target_host, content):
logger.debug("Doing remote join dance")
# do invite join dance
federation = self.hs.get_federation()
new_event = self.event_factory.create_event(
etype=InviteJoinEvent.TYPE,
target_host=target_host,
room_id=room_id,
user_id=joinee,
content=content
)
new_event.destinations = [target_host]
yield self.store.store_room(
room_id, "", is_public=False
)
#yield self.state_handler.handle_new_event(event)
yield federation.handle_new_event(new_event)
yield federation.get_state_for_room(
target_host, room_id
)
@defer.inlineCallbacks
def _inject_membership_msg(self, room_id=None, source=None, target=None,
membership=None):
# TODO this should be a different type of message, not m.text
if membership == Membership.INVITE:
body = "%s invited %s to the room." % (source, target)
elif membership == Membership.JOIN:
body = "%s joined the room." % (target)
elif membership == Membership.LEAVE:
body = "%s left the room." % (target)
else:
raise RoomError(500, "Unknown membership value %s" % membership)
membership_json = {
"msgtype": u"m.text",
"body": body,
"membership_source": source,
"membership_target": target,
"membership": membership,
}
msg_id = "m%s" % int(self.clock.time_msec())
event = self.event_factory.create_event(
etype=MessageEvent.TYPE,
room_id=room_id,
user_id="_homeserver_",
msg_id=msg_id,
content=membership_json
)
handler = self.hs.get_handlers().message_handler
yield handler.send_message(event, suppress_auth=True)
class RoomListHandler(BaseHandler):
@defer.inlineCallbacks
def get_public_room_list(self):
chunk = yield self.store.get_rooms(is_public=True, with_topics=True)
defer.returnValue({"start": "START", "end": "END", "chunk": chunk})