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- # -*- coding: utf-8 -*-
- # Copyright 2017 Vector Creations 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.async import Linearizer
- 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()
- self.read_marker_linearizer = Linearizer(name="read_marker")
- self.notifier = hs.get_notifier()
- @defer.inlineCallbacks
- def received_client_read_marker(self, room_id, user_id, event_id):
- """Updates the read marker for a given user in a given room if the event ID given
- is ahead in the stream relative to the current read marker.
- This uses a notifier to indicate that account data should be sent down /sync if
- the read marker has changed.
- """
- with (yield self.read_marker_linearizer.queue((room_id, user_id))):
- existing_read_marker = yield self.store.get_account_data_for_room_and_type(
- user_id, room_id, "m.fully_read",
- )
- should_update = True
- if existing_read_marker:
- # Only update if the new marker is ahead in the stream
- should_update = yield self.store.is_event_after(
- event_id,
- existing_read_marker['event_id']
- )
- if should_update:
- content = {
- "event_id": event_id
- }
- max_id = yield self.store.add_account_data_to_room(
- user_id, room_id, "m.fully_read", content
- )
- self.notifier.on_new_event("account_data_key", max_id, users=[user_id])
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