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- # 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.
- import logging
- from typing import TYPE_CHECKING
- from synapse.util.async_helpers import Linearizer
- if TYPE_CHECKING:
- from synapse.server import HomeServer
- logger = logging.getLogger(__name__)
- class ReadMarkerHandler:
- def __init__(self, hs: "HomeServer"):
- self.server_name = hs.config.server.server_name
- self.store = hs.get_datastores().main
- self.account_data_handler = hs.get_account_data_handler()
- self.read_marker_linearizer = Linearizer(name="read_marker")
- async def received_client_read_marker(
- self, room_id: str, user_id: str, event_id: str
- ) -> None:
- """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.
- """
- async with self.read_marker_linearizer.queue((room_id, user_id)):
- existing_read_marker = await 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 = await self.store.is_event_after(
- event_id, existing_read_marker["event_id"]
- )
- if should_update:
- content = {"event_id": event_id}
- await self.account_data_handler.add_account_data_to_room(
- user_id, room_id, "m.fully_read", content
- )
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