# -*- 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, unwrapFirstError from synapse.util.async import run_on_reactor from synapse.events.utils import serialize_event import logging import string 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: 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,)) 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, ratelimit=False) 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}, }, ratelimit=False) 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}, }, ratelimit=False) 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}, }, ratelimit=False) 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, "invite": 0, }, ) 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") def get_room_members(self, room_id): return self.store.get_user_objs_in_room(room_id) @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 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") # 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_hosts=hosts, do_auth=True) defer.returnValue({"room_id": room_id}) @defer.inlineCallbacks def _do_join(self, event, context, room_hosts=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_hosts: # 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_hosts = [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_hosts, room_id, event.user_id, event.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_joined_rooms_for_user(self, user): """Returns a list of roomids that the user has any of the given membership states in.""" app_service = yield self.store.get_app_service_by_user_id( user.to_string() ) if app_service: rooms = yield self.store.get_app_service_rooms(app_service) else: 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_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) results = yield defer.gatherResults( [ self.store.get_users_in_room(room["room_id"]) for room in chunk ], consumeErrors=True, ).addErrback(unwrapFirstError) for i, room in enumerate(chunk): room["num_joined_members"] = len(results[i]) # 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() 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: 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, 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, with_feedback=True ) defer.returnValue((events, next_key))