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# -*- coding: utf-8 -*-
# Copyright 2014 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.
from twisted.internet import defer
from ._base import BaseHandler
from synapse.api.errors import SynapseError, AuthError
import logging
from collections import namedtuple
logger = logging.getLogger(__name__)
# A tiny object useful for storing a user's membership in a room, as a mapping
# key
RoomMember = namedtuple("RoomMember", ("room_id", "user"))
class TypingNotificationHandler(BaseHandler):
def __init__(self, hs):
super(TypingNotificationHandler, self).__init__(hs)
self.homeserver = hs
self.clock = hs.get_clock()
self.federation = hs.get_replication_layer()
self.federation.register_edu_handler("m.typing", self._recv_edu)
self._member_typing_until = {} # clock time we expect to stop
self._member_typing_timer = {} # deferreds to manage theabove
# map room IDs to serial numbers
self._room_serials = {}
self._latest_room_serial = 0
# map room IDs to sets of users currently typing
self._room_typing = {}
@defer.inlineCallbacks
def started_typing(self, target_user, auth_user, room_id, timeout):
if not target_user.is_mine:
raise SynapseError(400, "User is not hosted on this Home Server")
if target_user != auth_user:
raise AuthError(400, "Cannot set another user's typing state")
until = self.clock.time_msec() + timeout
member = RoomMember(room_id=room_id, user=target_user)
was_present = member in self._member_typing_until
if member in self._member_typing_timer:
self.clock.cancel_call_later(self._member_typing_timer[member])
self._member_typing_until[member] = until
self._member_typing_timer[member] = self.clock.call_later(
timeout / 1000, lambda: self._stopped_typing(member)
)
if was_present:
# No point sending another notification
defer.returnValue(None)
yield self._push_update(
room_id=room_id,
user=target_user,
typing=True,
)
@defer.inlineCallbacks
def stopped_typing(self, target_user, auth_user, room_id):
if not target_user.is_mine:
raise SynapseError(400, "User is not hosted on this Home Server")
if target_user != auth_user:
raise AuthError(400, "Cannot set another user's typing state")
member = RoomMember(room_id=room_id, user=target_user)
yield self._stopped_typing(member)
@defer.inlineCallbacks
def _stopped_typing(self, member):
if member not in self._member_typing_until:
# No point
defer.returnValue(None)
yield self._push_update(
room_id=member.room_id,
user=member.user,
typing=False,
)
del self._member_typing_until[member]
self.clock.cancel_call_later(self._member_typing_timer[member])
del self._member_typing_timer[member]
@defer.inlineCallbacks
def _push_update(self, room_id, user, typing):
localusers = set()
remotedomains = set()
rm_handler = self.homeserver.get_handlers().room_member_handler
yield rm_handler.fetch_room_distributions_into(
room_id, localusers=localusers, remotedomains=remotedomains,
ignore_user=user
)
if localusers:
self._push_update_local(
room_id=room_id,
user=user,
typing=typing
)
deferreds = []
for domain in remotedomains:
deferreds.append(self.federation.send_edu(
destination=domain,
edu_type="m.typing",
content={
"room_id": room_id,
"user_id": user.to_string(),
"typing": typing,
},
))
yield defer.DeferredList(deferreds, consumeErrors=False)
@defer.inlineCallbacks
def _recv_edu(self, origin, content):
room_id = content["room_id"]
user = self.homeserver.parse_userid(content["user_id"])
localusers = set()
rm_handler = self.homeserver.get_handlers().room_member_handler
yield rm_handler.fetch_room_distributions_into(
room_id, localusers=localusers
)
if localusers:
self._push_update_local(
room_id=room_id,
user=user,
typing=content["typing"]
)
def _push_update_local(self, room_id, user, typing):
if room_id not in self._room_serials:
self._room_serials[room_id] = 0
self._room_typing[room_id] = set()
room_set = self._room_typing[room_id]
if typing:
room_set.add(user)
elif user in room_set:
room_set.remove(user)
self._latest_room_serial += 1
self._room_serials[room_id] = self._latest_room_serial
self.notifier.on_new_user_event(rooms=[room_id])
class TypingNotificationEventSource(object):
def __init__(self, hs):
self.hs = hs
self.handler = hs.get_handlers().typing_notification_handler
def _make_event_for(self, room_id):
typing = self.handler._room_typing[room_id]
return {
"type": "m.typing",
"room_id": room_id,
"typing": [u.to_string() for u in typing],
}
def get_new_events_for_user(self, user, from_key, limit):
from_key = int(from_key)
handler = self.handler
events = []
for room_id in handler._room_serials:
if handler._room_serials[room_id] <= from_key:
continue
# TODO: check if user is in room
events.append(self._make_event_for(room_id))
return (events, handler._latest_room_serial)
def get_current_key(self):
return self.handler._latest_room_serial
def get_pagination_rows(self, user, pagination_config, key):
return ([], pagination_config.from_key)
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