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83 lines
3 KiB
Python
83 lines
3 KiB
Python
#
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# This file is licensed under the Affero General Public License (AGPL) version 3.
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#
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# Copyright 2017 Vector Creations Ltd
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# Copyright (C) 2023 New Vector, Ltd
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# See the GNU Affero General Public License for more details:
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# <https://www.gnu.org/licenses/agpl-3.0.html>.
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#
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# Originally licensed under the Apache License, Version 2.0:
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# <http://www.apache.org/licenses/LICENSE-2.0>.
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#
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# [This file includes modifications made by New Vector Limited]
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#
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#
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import logging
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from typing import TYPE_CHECKING, Optional
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from synapse.api.constants import ReceiptTypes
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from synapse.api.errors import SynapseError
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from synapse.util.async_helpers import Linearizer
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from synapse.types import JsonDict
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if TYPE_CHECKING:
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from synapse.server import HomeServer
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logger = logging.getLogger(__name__)
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class ReadMarkerHandler:
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def __init__(self, hs: "HomeServer"):
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self.store = hs.get_datastores().main
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self.account_data_handler = hs.get_account_data_handler()
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self.read_marker_linearizer = Linearizer(name="read_marker")
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async def received_client_read_marker(
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self,
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room_id: str,
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user_id: str,
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event_id: str,
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extra_content: Optional[JsonDict] = None,
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) -> None:
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"""Updates the read marker for a given user in a given room if the event ID given
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is ahead in the stream relative to the current read marker.
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This uses a notifier to indicate that account data should be sent down /sync if
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the read marker has changed.
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"""
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async with self.read_marker_linearizer.queue((room_id, user_id)):
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existing_read_marker = await self.store.get_account_data_for_room_and_type(
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user_id, room_id, ReceiptTypes.FULLY_READ
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)
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should_update = True
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# Get event ordering, this also ensures we know about the event
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event_ordering = await self.store.get_event_ordering(event_id, room_id)
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if existing_read_marker:
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try:
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old_event_ordering = await self.store.get_event_ordering(
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existing_read_marker["event_id"], room_id
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)
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except SynapseError:
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# Old event no longer exists, assume new is ahead. This may
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# happen if the old event was removed due to retention.
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pass
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else:
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# Only update if the new marker is ahead in the stream
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should_update = event_ordering > old_event_ordering
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if should_update:
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content = {"event_id": event_id, **(extra_content or {})}
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await self.account_data_handler.add_account_data_to_room(
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user_id, room_id, ReceiptTypes.FULLY_READ, content
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)
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