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# -*- 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.
"""Contains handlers for federation events."""
from ._base import BaseHandler
from synapse.api.events.room import InviteJoinEvent, RoomMemberEvent
from synapse.api.constants import Membership
from synapse.util.logutils import log_function
from twisted.internet import defer
import logging
logger = logging.getLogger(__name__)
class FederationHandler(BaseHandler):
"""Handles events that originated from federation."""
def __init__(self, hs):
super(FederationHandler, self).__init__(hs)
self.distributor.observe(
"user_joined_room",
self._on_user_joined
)
self.waiting_for_join_list = {}
@log_function
@defer.inlineCallbacks
def on_receive(self, event, is_new_state, backfilled):
if hasattr(event, "state_key") and not is_new_state:
logger.debug("Ignoring old state.")
return
target_is_mine = False
if hasattr(event, "target_host"):
target_is_mine = event.target_host == self.hs.hostname
if event.type == InviteJoinEvent.TYPE:
if not target_is_mine:
logger.debug("Ignoring invite/join event %s", event)
return
# If we receive an invite/join event then we need to join the
# sender to the given room.
# TODO: We should probably auth this or some such
content = event.content
content.update({"membership": Membership.JOIN})
new_event = self.event_factory.create_event(
etype=RoomMemberEvent.TYPE,
state_key=event.user_id,
room_id=event.room_id,
user_id=event.user_id,
membership=Membership.JOIN,
content=content
)
yield self.hs.get_handlers().room_member_handler.change_membership(
new_event,
True
)
else:
with (yield self.room_lock.lock(event.room_id)):
store_id = yield self.store.persist_event(event, backfilled)
room = yield self.store.get_room(event.room_id)
if not room:
# Huh, let's try and get the current state
try:
federation = self.hs.get_federation()
yield federation.get_state_for_room(
event.origin, event.room_id
)
hosts = yield self.store.get_joined_hosts_for_room(
event.room_id
)
if self.hs.hostname in hosts:
try:
yield self.store.store_room(
event.room_id,
"",
is_public=False
)
except:
pass
except:
logger.exception(
"Failed to get current state for room %s",
event.room_id
)
if not backfilled:
yield self.notifier.on_new_room_event(event, store_id)
if event.type == RoomMemberEvent.TYPE:
if event.membership == Membership.JOIN:
user = self.hs.parse_userid(event.target_user_id)
self.distributor.fire(
"user_joined_room", user=user, room_id=event.room_id
)
@log_function
@defer.inlineCallbacks
def backfill(self, dest, room_id, limit):
events = yield self.hs.get_federation().backfill(dest, room_id, limit)
for event in events:
try:
yield self.store.persist_event(event, backfilled=True)
except:
logger.exception("Failed to persist event: %s", event)
defer.returnValue(events)
@log_function
@defer.inlineCallbacks
def do_invite_join(self, target_host, room_id, joinee, content):
federation = self.hs.get_federation()
hosts = yield self.store.get_joined_hosts_for_room(room_id)
if self.hs.hostname in hosts:
# We are already in the room.
logger.debug("We're already in the room apparently")
defer.returnValue(False)
# First get current state to see if we are already joined.
try:
yield federation.get_state_for_room(target_host, room_id)
hosts = yield self.store.get_joined_hosts_for_room(room_id)
if self.hs.hostname in hosts:
# Oh, we were actually in the room already.
logger.debug("We're already in the room apparently")
defer.returnValue(False)
except Exception:
logger.exception("Failed to get current state")
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 federation.handle_new_event(new_event)
# TODO (erikj): Time out here.
d = defer.Deferred()
self.waiting_for_join_list.setdefault((joinee, room_id), []).append(d)
yield d
try:
yield self.store.store_room(
event.room_id,
"",
is_public=False
)
except:
pass
defer.returnValue(True)
@log_function
def _on_user_joined(self, user, room_id):
waiters = self.waiting_for_join_list.get((user.to_string(), room_id), [])
while waiters:
waiters.pop().callback(None)
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