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# -*- coding: utf-8 -*-
# Copyright 2015, 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.
import logging
from twisted.internet import defer
from synapse.types import get_domain_from_id
from synapse.util import logcontext
from ._base import BaseHandler
logger = logging.getLogger(__name__)
class ReceiptsHandler(BaseHandler):
def __init__(self, hs):
super(ReceiptsHandler, self).__init__(hs)
self.server_name = hs.config.server_name
self.store = hs.get_datastore()
self.hs = hs
self.federation = hs.get_federation_sender()
hs.get_federation_registry().register_edu_handler(
"m.receipt", self._received_remote_receipt
)
self.clock = self.hs.get_clock()
self.state = hs.get_state_handler()
@defer.inlineCallbacks
def received_client_receipt(self, room_id, receipt_type, user_id,
event_id):
"""Called when a client tells us a local user has read up to the given
event_id in the room.
"""
receipt = {
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
"event_ids": [event_id],
"data": {
"ts": int(self.clock.time_msec()),
}
}
is_new = yield self._handle_new_receipts([receipt])
if is_new:
# fire off a process in the background to send the receipt to
# remote servers
self._push_remotes([receipt])
@defer.inlineCallbacks
def _received_remote_receipt(self, origin, content):
"""Called when we receive an EDU of type m.receipt from a remote HS.
"""
receipts = [
{
"room_id": room_id,
"receipt_type": receipt_type,
"user_id": user_id,
"event_ids": user_values["event_ids"],
"data": user_values.get("data", {}),
}
for room_id, room_values in content.items()
for receipt_type, users in room_values.items()
for user_id, user_values in users.items()
]
yield self._handle_new_receipts(receipts)
@defer.inlineCallbacks
def _handle_new_receipts(self, receipts):
"""Takes a list of receipts, stores them and informs the notifier.
"""
min_batch_id = None
max_batch_id = None
for receipt in receipts:
room_id = receipt["room_id"]
receipt_type = receipt["receipt_type"]
user_id = receipt["user_id"]
event_ids = receipt["event_ids"]
data = receipt["data"]
res = yield self.store.insert_receipt(
room_id, receipt_type, user_id, event_ids, data
)
if not res:
# res will be None if this read receipt is 'old'
continue
stream_id, max_persisted_id = res
if min_batch_id is None or stream_id < min_batch_id:
min_batch_id = stream_id
if max_batch_id is None or max_persisted_id > max_batch_id:
max_batch_id = max_persisted_id
if min_batch_id is None:
# no new receipts
defer.returnValue(False)
affected_room_ids = list(set([r["room_id"] for r in receipts]))
self.notifier.on_new_event(
"receipt_key", max_batch_id, rooms=affected_room_ids
)
# Note that the min here shouldn't be relied upon to be accurate.
yield self.hs.get_pusherpool().on_new_receipts(
min_batch_id, max_batch_id, affected_room_ids,
)
defer.returnValue(True)
@logcontext.preserve_fn # caller should not yield on this
@defer.inlineCallbacks
def _push_remotes(self, receipts):
"""Given a list of receipts, works out which remote servers should be
poked and pokes them.
"""
try:
# TODO: Some of this stuff should be coallesced.
for receipt in receipts:
room_id = receipt["room_id"]
receipt_type = receipt["receipt_type"]
user_id = receipt["user_id"]
event_ids = receipt["event_ids"]
data = receipt["data"]
users = yield self.state.get_current_user_in_room(room_id)
remotedomains = set(get_domain_from_id(u) for u in users)
remotedomains = remotedomains.copy()
remotedomains.discard(self.server_name)
logger.debug("Sending receipt to: %r", remotedomains)
for domain in remotedomains:
self.federation.send_edu(
destination=domain,
edu_type="m.receipt",
content={
room_id: {
receipt_type: {
user_id: {
"event_ids": event_ids,
"data": data,
}
}
},
},
key=(room_id, receipt_type, user_id),
)
except Exception:
logger.exception("Error pushing receipts to remote servers")
@defer.inlineCallbacks
def get_receipts_for_room(self, room_id, to_key):
"""Gets all receipts for a room, upto the given key.
"""
result = yield self.store.get_linearized_receipts_for_room(
room_id,
to_key=to_key,
)
if not result:
defer.returnValue([])
defer.returnValue(result)
class ReceiptEventSource(object):
def __init__(self, hs):
self.store = hs.get_datastore()
@defer.inlineCallbacks
def get_new_events(self, from_key, room_ids, **kwargs):
from_key = int(from_key)
to_key = yield self.get_current_key()
if from_key == to_key:
defer.returnValue(([], to_key))
events = yield self.store.get_linearized_receipts_for_rooms(
room_ids,
from_key=from_key,
to_key=to_key,
)
defer.returnValue((events, to_key))
def get_current_key(self, direction='f'):
return self.store.get_max_receipt_stream_id()
@defer.inlineCallbacks
def get_pagination_rows(self, user, config, key):
to_key = int(config.from_key)
if config.to_key:
from_key = int(config.to_key)
else:
from_key = None
room_ids = yield self.store.get_rooms_for_user(user.to_string())
events = yield self.store.get_linearized_receipts_for_rooms(
room_ids,
from_key=from_key,
to_key=to_key,
)
defer.returnValue((events, to_key))
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