synapse-old/synapse/handlers/typing.py

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# -*- coding: utf-8 -*-
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# Copyright 2014-2016 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
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from synapse.api.errors import SynapseError, AuthError
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from synapse.util.logcontext import (
PreserveLoggingContext, preserve_fn, preserve_context_over_deferred,
)
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from synapse.util.metrics import Measure
from synapse.types import UserID, get_domain_from_id
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import logging
from collections import namedtuple
import ujson as json
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_id"))
class TypingHandler(object):
def __init__(self, hs):
self.store = hs.get_datastore()
self.server_name = hs.config.server_name
self.auth = hs.get_auth()
self.is_mine_id = hs.is_mine_id
self.notifier = hs.get_notifier()
self.state = hs.get_state_handler()
self.clock = hs.get_clock()
self.federation = hs.get_replication_layer()
self.federation.register_edu_handler("m.typing", self._recv_edu)
hs.get_distributor().observe("user_left_room", self.user_left_room)
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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 = {}
def tearDown(self):
"""Cancels all the pending timers.
Normally this shouldn't be needed, but it's required from unit tests
to avoid a "Reactor was unclean" warning."""
for t in self._member_typing_timer.values():
self.clock.cancel_call_later(t)
@defer.inlineCallbacks
def started_typing(self, target_user, auth_user, room_id, timeout):
target_user_id = target_user.to_string()
auth_user_id = auth_user.to_string()
if not self.is_mine_id(target_user_id):
raise SynapseError(400, "User is not hosted on this Home Server")
if target_user_id != auth_user_id:
raise AuthError(400, "Cannot set another user's typing state")
yield self.auth.check_joined_room(room_id, target_user_id)
logger.debug(
"%s has started typing in %s", target_user_id, room_id
)
until = self.clock.time_msec() + timeout
member = RoomMember(room_id=room_id, user_id=target_user_id)
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])
def _cb():
logger.debug(
"%s has timed out in %s", target_user.to_string(), room_id
)
self._stopped_typing(member)
self._member_typing_until[member] = until
self._member_typing_timer[member] = self.clock.call_later(
timeout / 1000.0, _cb
)
if was_present:
# No point sending another notification
defer.returnValue(None)
yield self._push_update(
room_id=room_id,
user_id=target_user_id,
typing=True,
)
@defer.inlineCallbacks
def stopped_typing(self, target_user, auth_user, room_id):
target_user_id = target_user.to_string()
auth_user_id = auth_user.to_string()
if not self.is_mine_id(target_user_id):
raise SynapseError(400, "User is not hosted on this Home Server")
if target_user_id != auth_user_id:
raise AuthError(400, "Cannot set another user's typing state")
yield self.auth.check_joined_room(room_id, target_user_id)
logger.debug(
"%s has stopped typing in %s", target_user_id, room_id
)
member = RoomMember(room_id=room_id, user_id=target_user_id)
if member in self._member_typing_timer:
self.clock.cancel_call_later(self._member_typing_timer[member])
del self._member_typing_timer[member]
yield self._stopped_typing(member)
@defer.inlineCallbacks
def user_left_room(self, user, room_id):
user_id = user.to_string()
if self.is_mine_id(user_id):
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member = RoomMember(room_id=room_id, user_id=user_id)
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_id=member.user_id,
typing=False,
)
del self._member_typing_until[member]
if member in self._member_typing_timer:
# Don't cancel it - either it already expired, or the real
# stopped_typing() will cancel it
del self._member_typing_timer[member]
@defer.inlineCallbacks
def _push_update(self, room_id, user_id, typing):
users = yield self.state.get_current_user_in_room(room_id)
domains = set(get_domain_from_id(u) for u in users)
deferreds = []
for domain in domains:
if domain == self.server_name:
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preserve_fn(self._push_update_local)(
room_id=room_id,
user_id=user_id,
typing=typing
)
else:
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deferreds.append(preserve_fn(self.federation.send_edu)(
destination=domain,
edu_type="m.typing",
content={
"room_id": room_id,
"user_id": user_id,
"typing": typing,
},
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key=(room_id, user_id),
))
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yield preserve_context_over_deferred(
defer.DeferredList(deferreds, consumeErrors=True)
)
@defer.inlineCallbacks
def _recv_edu(self, origin, content):
room_id = content["room_id"]
user_id = content["user_id"]
# Check that the string is a valid user id
user = UserID.from_string(user_id)
if user.domain != origin:
logger.info(
"Got typing update from %r with bad 'user_id': %r",
origin, user_id,
)
return
users = yield self.state.get_current_user_in_room(room_id)
domains = set(get_domain_from_id(u) for u in users)
if self.server_name in domains:
self._push_update_local(
room_id=room_id,
user_id=user_id,
typing=content["typing"]
)
def _push_update_local(self, room_id, user_id, typing):
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room_set = self._room_typing.setdefault(room_id, set())
if typing:
room_set.add(user_id)
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else:
room_set.discard(user_id)
self._latest_room_serial += 1
self._room_serials[room_id] = self._latest_room_serial
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with PreserveLoggingContext():
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self.notifier.on_new_event(
"typing_key", self._latest_room_serial, rooms=[room_id]
)
def get_all_typing_updates(self, last_id, current_id):
# TODO: Work out a way to do this without scanning the entire state.
if last_id == current_id:
return []
rows = []
for room_id, serial in self._room_serials.items():
if last_id < serial and serial <= current_id:
typing = self._room_typing[room_id]
typing_bytes = json.dumps(list(typing), ensure_ascii=False)
rows.append((serial, room_id, typing_bytes))
rows.sort()
return rows
class TypingNotificationEventSource(object):
def __init__(self, hs):
self.hs = hs
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self.clock = hs.get_clock()
# We can't call get_typing_handler here because there's a cycle:
#
# Typing -> Notifier -> TypingNotificationEventSource -> Typing
#
self.get_typing_handler = hs.get_typing_handler
def _make_event_for(self, room_id):
typing = self.get_typing_handler()._room_typing[room_id]
return {
"type": "m.typing",
"room_id": room_id,
"content": {
"user_ids": list(typing),
},
}
def get_new_events(self, from_key, room_ids, **kwargs):
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with Measure(self.clock, "typing.get_new_events"):
from_key = int(from_key)
handler = self.get_typing_handler()
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events = []
for room_id in room_ids:
if room_id not in handler._room_serials:
continue
if handler._room_serials[room_id] <= from_key:
continue
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events.append(self._make_event_for(room_id))
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return events, handler._latest_room_serial
def get_current_key(self):
return self.get_typing_handler()._latest_room_serial
def get_pagination_rows(self, user, pagination_config, key):
return ([], pagination_config.from_key)