529 lines
16 KiB
Python
529 lines
16 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright 2014 - 2016 OpenMarket Ltd
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# Copyright 2018 New Vector 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 ._base import BaseHandler
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from synapse.types import UserID, RoomAlias, RoomID, RoomStreamToken
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from synapse.api.constants import (
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EventTypes, JoinRules, RoomCreationPreset
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)
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from synapse.api.errors import AuthError, StoreError, SynapseError
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from synapse.util import stringutils
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from synapse.visibility import filter_events_for_client
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from collections import OrderedDict
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import logging
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import math
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import string
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logger = logging.getLogger(__name__)
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id_server_scheme = "https://"
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class RoomCreationHandler(BaseHandler):
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PRESETS_DICT = {
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RoomCreationPreset.PRIVATE_CHAT: {
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"join_rules": JoinRules.INVITE,
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"history_visibility": "shared",
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"original_invitees_have_ops": False,
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"guest_can_join": True,
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},
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RoomCreationPreset.TRUSTED_PRIVATE_CHAT: {
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"join_rules": JoinRules.INVITE,
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"history_visibility": "shared",
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"original_invitees_have_ops": True,
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"guest_can_join": True,
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},
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RoomCreationPreset.PUBLIC_CHAT: {
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"join_rules": JoinRules.PUBLIC,
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"history_visibility": "shared",
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"original_invitees_have_ops": False,
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"guest_can_join": False,
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},
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}
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def __init__(self, hs):
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super(RoomCreationHandler, self).__init__(hs)
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self.spam_checker = hs.get_spam_checker()
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self.event_creation_handler = hs.get_event_creation_handler()
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@defer.inlineCallbacks
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def create_room(self, requester, config, ratelimit=True):
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""" Creates a new room.
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Args:
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requester (Requester): The user who requested the room creation.
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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 couldn't be stored, or something went
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horribly wrong.
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"""
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user_id = requester.user.to_string()
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if not self.spam_checker.user_may_create_room(user_id):
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raise SynapseError(403, "You are not permitted to create rooms")
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if ratelimit:
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yield self.ratelimit(requester)
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if "room_alias_name" in config:
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for wchar in string.whitespace:
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if wchar in config["room_alias_name"]:
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raise SynapseError(400, "Invalid characters in room alias")
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room_alias = RoomAlias(
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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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UserID.from_string(i)
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except Exception:
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raise SynapseError(400, "Invalid user_id: %s" % (i,))
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invite_3pid_list = config.get("invite_3pid", [])
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visibility = config.get("visibility", None)
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is_public = visibility == "public"
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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(
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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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preset_config = config.get(
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"preset",
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RoomCreationPreset.PRIVATE_CHAT
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if visibility == "private"
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else RoomCreationPreset.PUBLIC_CHAT
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)
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raw_initial_state = config.get("initial_state", [])
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initial_state = OrderedDict()
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for val in raw_initial_state:
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initial_state[(val["type"], val.get("state_key", ""))] = val["content"]
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creation_content = config.get("creation_content", {})
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room_member_handler = self.hs.get_room_member_handler()
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yield self._send_events_for_new_room(
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requester,
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room_id,
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room_member_handler,
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preset_config=preset_config,
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invite_list=invite_list,
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initial_state=initial_state,
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creation_content=creation_content,
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room_alias=room_alias,
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power_level_content_override=config.get("power_level_content_override", {})
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)
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if "name" in config:
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name = config["name"]
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yield self.event_creation_handler.create_and_send_nonmember_event(
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requester,
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{
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"type": EventTypes.Name,
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"room_id": room_id,
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"sender": user_id,
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"state_key": "",
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"content": {"name": name},
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},
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ratelimit=False)
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if "topic" in config:
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topic = config["topic"]
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yield self.event_creation_handler.create_and_send_nonmember_event(
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requester,
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{
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"type": EventTypes.Topic,
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"room_id": room_id,
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"sender": user_id,
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"state_key": "",
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"content": {"topic": topic},
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},
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ratelimit=False)
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for invitee in invite_list:
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content = {}
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is_direct = config.get("is_direct", None)
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if is_direct:
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content["is_direct"] = is_direct
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yield room_member_handler.update_membership(
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requester,
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UserID.from_string(invitee),
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room_id,
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"invite",
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ratelimit=False,
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content=content,
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)
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for invite_3pid in invite_3pid_list:
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id_server = invite_3pid["id_server"]
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address = invite_3pid["address"]
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medium = invite_3pid["medium"]
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yield self.hs.get_room_member_handler().do_3pid_invite(
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room_id,
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requester.user,
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medium,
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address,
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id_server,
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requester,
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txn_id=None,
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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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requester, user_id, room_id
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)
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defer.returnValue(result)
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@defer.inlineCallbacks
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def _send_events_for_new_room(
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self,
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creator, # A Requester object.
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room_id,
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room_member_handler,
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preset_config,
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invite_list,
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initial_state,
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creation_content,
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room_alias,
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power_level_content_override,
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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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@defer.inlineCallbacks
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def send(etype, content, **kwargs):
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event = create(etype, content, **kwargs)
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yield self.event_creation_handler.create_and_send_nonmember_event(
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creator,
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event,
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ratelimit=False
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)
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config = RoomCreationHandler.PRESETS_DICT[preset_config]
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creator_id = creator.user.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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creation_content.update({"creator": creator_id})
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yield send(
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etype=EventTypes.Create,
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content=creation_content,
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)
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yield room_member_handler.update_membership(
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creator,
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creator.user,
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room_id,
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"join",
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ratelimit=False,
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)
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# We treat the power levels override specially as this needs to be one
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# of the first events that get sent into a room.
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pl_content = initial_state.pop((EventTypes.PowerLevels, ''), None)
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if pl_content is not None:
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yield send(
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etype=EventTypes.PowerLevels,
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content=pl_content,
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)
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else:
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power_level_content = {
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"users": {
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creator_id: 100,
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},
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"users_default": 0,
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"events": {
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EventTypes.Name: 50,
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EventTypes.PowerLevels: 100,
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EventTypes.RoomHistoryVisibility: 100,
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EventTypes.CanonicalAlias: 50,
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EventTypes.RoomAvatar: 50,
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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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"invite": 0,
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}
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if config["original_invitees_have_ops"]:
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for invitee in invite_list:
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power_level_content["users"][invitee] = 100
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power_level_content.update(power_level_content_override)
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yield send(
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etype=EventTypes.PowerLevels,
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content=power_level_content,
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)
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if room_alias and (EventTypes.CanonicalAlias, '') not in initial_state:
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yield send(
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etype=EventTypes.CanonicalAlias,
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content={"alias": room_alias.to_string()},
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)
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if (EventTypes.JoinRules, '') not in initial_state:
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yield send(
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etype=EventTypes.JoinRules,
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content={"join_rule": config["join_rules"]},
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)
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if (EventTypes.RoomHistoryVisibility, '') not in initial_state:
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yield send(
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etype=EventTypes.RoomHistoryVisibility,
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content={"history_visibility": config["history_visibility"]}
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)
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if config["guest_can_join"]:
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if (EventTypes.GuestAccess, '') not in initial_state:
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yield send(
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etype=EventTypes.GuestAccess,
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content={"guest_access": "can_join"}
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)
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for (etype, state_key), content in initial_state.items():
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yield send(
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etype=etype,
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state_key=state_key,
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content=content,
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)
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class RoomContextHandler(BaseHandler):
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@defer.inlineCallbacks
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def get_event_context(self, user, room_id, event_id, limit):
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"""Retrieves events, pagination tokens and state around a given event
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in a room.
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Args:
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user (UserID)
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room_id (str)
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event_id (str)
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limit (int): The maximum number of events to return in total
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(excluding state).
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Returns:
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dict, or None if the event isn't found
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"""
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before_limit = math.floor(limit / 2.)
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after_limit = limit - before_limit
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now_token = yield self.hs.get_event_sources().get_current_token()
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users = yield self.store.get_users_in_room(room_id)
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is_peeking = user.to_string() not in users
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def filter_evts(events):
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return filter_events_for_client(
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self.store,
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user.to_string(),
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events,
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is_peeking=is_peeking
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)
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event = yield self.store.get_event(event_id, get_prev_content=True,
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allow_none=True)
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if not event:
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defer.returnValue(None)
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return
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filtered = yield(filter_evts([event]))
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if not filtered:
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raise AuthError(
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403,
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"You don't have permission to access that event."
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)
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results = yield self.store.get_events_around(
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room_id, event_id, before_limit, after_limit
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)
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results["events_before"] = yield filter_evts(results["events_before"])
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results["events_after"] = yield filter_evts(results["events_after"])
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results["event"] = event
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if results["events_after"]:
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last_event_id = results["events_after"][-1].event_id
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else:
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last_event_id = event_id
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state = yield self.store.get_state_for_events(
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[last_event_id], None
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)
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results["state"] = state[last_event_id].values()
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results["start"] = now_token.copy_and_replace(
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"room_key", results["start"]
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).to_string()
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results["end"] = now_token.copy_and_replace(
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"room_key", results["end"]
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).to_string()
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defer.returnValue(results)
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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(
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self,
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user,
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from_key,
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limit,
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room_ids,
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is_guest,
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explicit_room_id=None,
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):
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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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from_token = RoomStreamToken.parse(from_key)
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if from_token.topological:
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logger.warn("Stream has topological part!!!! %r", from_key)
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from_key = "s%s" % (from_token.stream,)
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app_service = self.store.get_app_service_by_user_id(
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user.to_string()
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)
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if app_service:
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events, end_key = yield self.store.get_appservice_room_stream(
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service=app_service,
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from_key=from_key,
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to_key=to_key,
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limit=limit,
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)
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else:
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room_events = yield self.store.get_membership_changes_for_user(
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user.to_string(), from_key, to_key
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)
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room_to_events = yield self.store.get_room_events_stream_for_rooms(
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room_ids=room_ids,
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from_key=from_key,
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to_key=to_key,
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limit=limit or 10,
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order='ASC',
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)
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events = list(room_events)
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events.extend(e for evs, _ in room_to_events.values() for e in evs)
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events.sort(key=lambda e: e.internal_metadata.order)
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if limit:
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events[:] = events[:limit]
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if events:
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end_key = events[-1].internal_metadata.after
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else:
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end_key = to_key
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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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def get_current_key_for_room(self, room_id):
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return self.store.get_room_events_max_id(room_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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)
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defer.returnValue((events, next_key))
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