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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.
from ._base import BaseHandler
from twisted.internet import defer
from synapse.util.logcontext import PreserveLoggingContext
from synapse.types import get_domain_from_id
import logging
logger = logging.getLogger(__name__)
class ReadMarkerHandler(BaseHandler):
def __init__(self, hs):
super(ReadMarkerHandler, self).__init__(hs)
self.server_name = hs.config.server_name
self.store = hs.get_datastore()
@defer.inlineCallbacks
def received_client_read_marker(self, room_id, user_id, event_id):
"""NEEDS DOC
"""
room_id = read_marker["room_id"]
user_id = read_marker["user_id"]
event_id = read_marker["event_id"]
# Get ordering for existing read marker
account_data = yield self.store.get_account_data_for_room(user_id, room_id)
existing_read_marker = account_data["m.read_marker"]
if existing_read_marker:
# Get ordering for new read marker
res = self.store._simple_select_one_txn(
txn,
table="events",
retcols=["topological_ordering", "stream_ordering"],
keyvalues={"event_id": event_id},
allow_none=True
)
new_to = int(res["topological_ordering"]) if res else None
new_so = int(res["stream_ordering"]) if res else None
res = self.store._simple_select_one_txn(
txn,
table="events",
retcols=["topological_ordering", "stream_ordering"],
keyvalues={"event_id": existing_read_marker.content.marker},
allow_none=True
)
existing_to = int(res["topological_ordering"]) if res else None
existing_so = int(res["stream_ordering"]) if res else None
if new_to > existing_to:
return False
elif new_to == existing_to and new_so >= existing_so:
return False
# Update account data
content = {
"marker": event_id
}
yield self.store.add_account_data_to_room(
user_id, room_id, "m.read_marker", content
)
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