568 lines
19 KiB
Python
568 lines
19 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 OpenMarket Ltd
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Contains functions for performing events on rooms."""
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from twisted.internet import defer
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from synapse.types import UserID, RoomAlias, RoomID
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from synapse.api.constants import Membership, JoinRules
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from synapse.api.errors import StoreError, SynapseError
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from synapse.api.events.room import (
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RoomMemberEvent, RoomCreateEvent, RoomPowerLevelsEvent,
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RoomTopicEvent, RoomNameEvent, RoomJoinRulesEvent,
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)
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from synapse.util import stringutils
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from synapse.util.async import run_on_reactor
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from ._base import BaseHandler
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import logging
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logger = logging.getLogger(__name__)
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class RoomCreationHandler(BaseHandler):
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@defer.inlineCallbacks
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def create_room(self, user_id, room_id, config):
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""" Creates a new room.
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Args:
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user_id (str): The ID of the user creating the new room.
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room_id (str): The proposed ID for the new room. Can be None, in
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which case one will be created for you.
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config (dict) : A dict of configuration options.
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Returns:
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The new room ID.
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Raises:
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SynapseError if the room ID was taken, couldn't be stored, or
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something went horribly wrong.
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"""
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self.ratelimit(user_id)
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if "room_alias_name" in config:
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room_alias = RoomAlias.create(
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config["room_alias_name"],
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self.hs.hostname,
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)
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mapping = yield self.store.get_association_from_room_alias(
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room_alias
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)
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if mapping:
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raise SynapseError(400, "Room alias already taken")
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else:
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room_alias = None
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invite_list = config.get("invite", [])
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for i in invite_list:
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try:
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self.hs.parse_userid(i)
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except:
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raise SynapseError(400, "Invalid user_id: %s" % (i,))
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is_public = config.get("visibility", None) == "public"
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if room_id:
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# Ensure room_id is the correct type
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room_id_obj = RoomID.from_string(room_id)
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if not self.hs.is_mine(room_id_obj):
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raise SynapseError(400, "Room id must be local")
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yield self.store.store_room(
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room_id=room_id,
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room_creator_user_id=user_id,
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is_public=is_public
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)
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else:
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# autogen room IDs and try to create it. We may clash, so just
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# try a few times till one goes through, giving up eventually.
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attempts = 0
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room_id = None
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while attempts < 5:
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try:
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random_string = stringutils.random_string(18)
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gen_room_id = RoomID.create(
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random_string,
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self.hs.hostname,
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)
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yield self.store.store_room(
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room_id=gen_room_id.to_string(),
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room_creator_user_id=user_id,
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is_public=is_public
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)
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room_id = gen_room_id.to_string()
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break
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except StoreError:
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attempts += 1
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if not room_id:
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raise StoreError(500, "Couldn't generate a room ID.")
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if room_alias:
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directory_handler = self.hs.get_handlers().directory_handler
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yield directory_handler.create_association(
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user_id=user_id,
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room_id=room_id,
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room_alias=room_alias,
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servers=[self.hs.hostname],
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)
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user = self.hs.parse_userid(user_id)
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creation_events = self._create_events_for_new_room(
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user, room_id, is_public=is_public
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)
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msg_handler = self.hs.get_handlers().message_handler
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for event in creation_events:
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yield msg_handler.handle_event(event)
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if "name" in config:
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name = config["name"]
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yield msg_handler.handle_event({
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"type": RoomNameEvent.TYPE,
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"room_id": room_id,
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"sender": user_id,
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"content": {"name": name},
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})
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if "topic" in config:
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topic = config["topic"]
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yield msg_handler.handle_event({
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"type": RoomTopicEvent.TYPE,
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"room_id": room_id,
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"sender": user_id,
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"content": {"topic": topic},
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})
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for invitee in invite_list:
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yield msg_handler.handle_event({
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"type": RoomMemberEvent.TYPE,
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"state_key": invitee,
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"room_id": room_id,
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"user_id": user_id,
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"content": {"membership": Membership.INVITE},
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})
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result = {"room_id": room_id}
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if room_alias:
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result["room_alias"] = room_alias.to_string()
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yield directory_handler.send_room_alias_update_event(
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user_id, room_id
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)
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defer.returnValue(result)
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def _create_events_for_new_room(self, creator, room_id, is_public=False):
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creator_id = creator.to_string()
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event_keys = {
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"room_id": room_id,
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"sender": creator_id,
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"state_key": "",
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}
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def create(etype, content, **kwargs):
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e = {
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"type": etype,
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"content": content,
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}
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e.update(event_keys)
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e.update(kwargs)
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return e
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creation_event = create(
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etype=RoomCreateEvent.TYPE,
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content={"creator": creator.to_string()},
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)
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join_event = create(
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etype=RoomMemberEvent.TYPE,
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state_key=creator_id,
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content={
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"membership": Membership.JOIN,
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},
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)
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power_levels_event = create(
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etype=RoomPowerLevelsEvent.TYPE,
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content={
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"users": {
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creator.to_string(): 100,
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},
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"users_default": 0,
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"events": {
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RoomNameEvent.TYPE: 100,
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RoomPowerLevelsEvent.TYPE: 100,
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},
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"events_default": 0,
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"state_default": 50,
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"ban": 50,
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"kick": 50,
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"redact": 50
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},
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)
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join_rule = JoinRules.PUBLIC if is_public else JoinRules.INVITE
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join_rules_event = create(
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etype=RoomJoinRulesEvent.TYPE,
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content={"join_rule": join_rule},
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)
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return [
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creation_event,
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join_event,
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power_levels_event,
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join_rules_event,
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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
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# low-level API that works on UserID objects and so on, and REST-level
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# API that takes ID strings and returns pagination chunks. These concerns
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# ought to be separated out a lot better.
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def __init__(self, hs):
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super(RoomMemberHandler, self).__init__(hs)
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self.clock = hs.get_clock()
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self.distributor = hs.get_distributor()
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self.distributor.declare("user_joined_room")
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@defer.inlineCallbacks
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def get_room_members(self, room_id, membership=Membership.JOIN):
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hs = self.hs
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memberships = yield self.store.get_room_members(
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room_id=room_id, membership=membership
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)
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defer.returnValue([hs.parse_userid(m.user_id) for m in memberships])
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@defer.inlineCallbacks
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def fetch_room_distributions_into(self, room_id, localusers=None,
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remotedomains=None, ignore_user=None):
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"""Fetch the distribution of a room, adding elements to either
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'localusers' or 'remotedomains', which should be a set() if supplied.
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If ignore_user is set, ignore that user.
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This function returns nothing; its result is performed by the
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side-effect on the two passed sets. This allows easy accumulation of
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member lists of multiple rooms at once if required.
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"""
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members = yield self.get_room_members(room_id)
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for member in members:
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if ignore_user is not None and member == ignore_user:
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continue
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if self.hs.is_mine(member):
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if localusers is not None:
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localusers.add(member)
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else:
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if remotedomains is not None:
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remotedomains.add(member.domain)
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@defer.inlineCallbacks
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def get_room_members_as_pagination_chunk(self, room_id=None, user_id=None,
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limit=0, start_tok=None,
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end_tok=None):
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"""Retrieve a list of room members in the room.
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Args:
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room_id (str): The room to get the member list for.
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user_id (str): The ID of the user making the request.
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limit (int): The max number of members to return.
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start_tok (str): Optional. The start token if known.
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end_tok (str): Optional. The end token if known.
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Returns:
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dict: A Pagination streamable dict.
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Raises:
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SynapseError if something goes wrong.
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"""
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yield self.auth.check_joined_room(room_id, user_id)
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member_list = yield self.store.get_room_members(room_id=room_id)
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event_list = [
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self.hs.serialize_event(entry)
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for entry in member_list
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]
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chunk_data = {
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"start": "START", # FIXME (erikj): START is no longer valid
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"end": "END",
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"chunk": event_list
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}
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# TODO honor Pagination stream params
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# TODO snapshot this list to return on subsequent requests when
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# paginating
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defer.returnValue(chunk_data)
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@defer.inlineCallbacks
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def get_room_member(self, room_id, member_user_id, auth_user_id):
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"""Retrieve a room member from a room.
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Args:
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room_id : The room the member is in.
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member_user_id : The member's user ID
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auth_user_id : The user ID of the user making this request.
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Returns:
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The room member, or None if this member does not exist.
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Raises:
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SynapseError if something goes wrong.
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"""
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yield self.auth.check_joined_room(room_id, auth_user_id)
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member = yield self.store.get_room_member(user_id=member_user_id,
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room_id=room_id)
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defer.returnValue(member)
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@defer.inlineCallbacks
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def change_membership(self, event, context, do_auth=True):
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""" Change the membership status of a user in a room.
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Args:
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event (SynapseEvent): The membership event
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Raises:
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SynapseError if there was a problem changing the membership.
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"""
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target_user_id = event.state_key
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# TODO(markjh): get prev state from snapshot.
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prev_state = yield self.store.get_room_member(
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target_user_id, event.room_id
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)
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room_id = event.room_id
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# If we're trying to join a room then we have to do this differently
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# if this HS is not currently in the room, i.e. we have to do the
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# invite/join dance.
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if event.membership == Membership.JOIN:
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yield self._do_join(event, context, do_auth=do_auth)
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else:
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# This is not a JOIN, so we can handle it normally.
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# FIXME: This isn't idempotency.
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if prev_state and prev_state.membership == event.membership:
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# double same action, treat this event as a NOOP.
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defer.returnValue({})
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return
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yield self._do_local_membership_update(
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event,
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membership=event.content["membership"],
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context=context,
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do_auth=do_auth,
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)
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defer.returnValue({"room_id": room_id})
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@defer.inlineCallbacks
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def join_room_alias(self, joinee, room_alias, do_auth=True, content={}):
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directory_handler = self.hs.get_handlers().directory_handler
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mapping = yield directory_handler.get_association(room_alias)
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if not mapping:
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raise SynapseError(404, "No such room alias")
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room_id = mapping["room_id"]
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hosts = mapping["servers"]
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if not hosts:
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raise SynapseError(404, "No known servers")
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host = hosts[0]
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content.update({"membership": Membership.JOIN})
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builder = self.event_builder_factory.new({
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"type": RoomMemberEvent.TYPE,
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"state_key": joinee.to_string(),
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"room_id": room_id,
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"sender": joinee.to_string(),
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"membership": Membership.JOIN,
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"content": content,
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})
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event, context = yield self._create_new_client_event(builder)
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yield self._do_join(event, context, room_host=host, do_auth=True)
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defer.returnValue({"room_id": room_id})
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@defer.inlineCallbacks
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def _do_join(self, event, context, room_host=None, do_auth=True):
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joinee = self.hs.parse_userid(event.state_key)
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# room_id = RoomID.from_string(event.room_id, self.hs)
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room_id = event.room_id
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# XXX: We don't do an auth check if we are doing an invite
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# join dance for now, since we're kinda implicitly checking
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# that we are allowed to join when we decide whether or not we
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# need to do the invite/join dance.
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is_host_in_room = yield self.auth.check_host_in_room(
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event.room_id,
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self.hs.hostname
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)
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if is_host_in_room:
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should_do_dance = False
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elif room_host:
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should_do_dance = True
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else:
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# TODO(markjh): get prev_state from snapshot
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prev_state = yield self.store.get_room_member(
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joinee.to_string(), room_id
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)
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if prev_state and prev_state.membership == Membership.INVITE:
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inviter = UserID.from_string(prev_state.user_id)
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should_do_dance = not self.hs.is_mine(inviter)
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room_host = inviter.domain
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else:
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should_do_dance = False
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if should_do_dance:
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handler = self.hs.get_handlers().federation_handler
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yield handler.do_invite_join(
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room_host,
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room_id,
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event.user_id,
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event.get_dict()["content"], # FIXME To get a non-frozen dict
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context
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)
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else:
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logger.debug("Doing normal join")
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yield self._do_local_membership_update(
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event,
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membership=event.content["membership"],
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context=context,
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do_auth=do_auth,
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)
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user = self.hs.parse_userid(event.user_id)
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yield self.distributor.fire(
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"user_joined_room", user=user, room_id=room_id
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)
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@defer.inlineCallbacks
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def _should_invite_join(self, room_id, prev_state, do_auth):
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logger.debug("_should_invite_join: room_id: %s", room_id)
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# XXX: We don't do an auth check if we are doing an invite
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# join dance for now, since we're kinda implicitly checking
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# that we are allowed to join when we decide whether or not we
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# need to do the invite/join dance.
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# Only do an invite join dance if a) we were invited,
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# b) the person inviting was from a differnt HS and c) we are
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# not currently in the room
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room_host = None
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if prev_state and prev_state.membership == Membership.INVITE:
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room = yield self.store.get_room(room_id)
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inviter = UserID.from_string(
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prev_state.sender
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)
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is_remote_invite_join = not self.hs.is_mine(inviter) and not room
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room_host = inviter.domain
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else:
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is_remote_invite_join = False
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defer.returnValue((is_remote_invite_join, room_host))
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@defer.inlineCallbacks
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def get_rooms_for_user(self, user, membership_list=[Membership.JOIN]):
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"""Returns a list of roomids that the user has any of the given
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membership states in."""
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rooms = yield self.store.get_rooms_for_user_where_membership_is(
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user_id=user.to_string(), membership_list=membership_list
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)
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# For some reason the list of events contains duplicates
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# TODO(paul): work out why because I really don't think it should
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room_ids = set(r.room_id for r in rooms)
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defer.returnValue(room_ids)
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@defer.inlineCallbacks
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def _do_local_membership_update(self, event, membership, context,
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do_auth):
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yield run_on_reactor()
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target_user = self.hs.parse_userid(event.state_key)
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yield self.handle_new_client_event(
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event,
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context,
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extra_users=[target_user],
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suppress_auth=(not do_auth),
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)
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class RoomListHandler(BaseHandler):
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@defer.inlineCallbacks
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def get_public_room_list(self):
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chunk = yield self.store.get_rooms(is_public=True)
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for room in chunk:
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joined_members = yield self.store.get_room_members(
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room_id=room["room_id"],
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membership=Membership.JOIN
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)
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room["num_joined_members"] = len(joined_members)
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# FIXME (erikj): START is no longer a valid value
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defer.returnValue({"start": "START", "end": "END", "chunk": chunk})
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class RoomEventSource(object):
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def __init__(self, hs):
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self.store = hs.get_datastore()
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@defer.inlineCallbacks
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def get_new_events_for_user(self, user, from_key, limit):
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# We just ignore the key for now.
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to_key = yield self.get_current_key()
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events, end_key = yield self.store.get_room_events_stream(
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user_id=user.to_string(),
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from_key=from_key,
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to_key=to_key,
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room_id=None,
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limit=limit,
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)
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defer.returnValue((events, end_key))
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def get_current_key(self):
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return self.store.get_room_events_max_id()
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@defer.inlineCallbacks
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def get_pagination_rows(self, user, config, key):
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events, next_key = yield self.store.paginate_room_events(
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room_id=key,
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from_key=config.from_key,
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to_key=config.to_key,
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direction=config.direction,
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limit=config.limit,
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with_feedback=True
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)
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defer.returnValue((events, next_key))
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