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element-web/src/components/structures/grouper/LateEventGrouper.ts
David Langley 491f0cd08a Change license (#13)
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TypeScript

/*
Copyright 2024 New Vector Ltd.
Copyright 2023 The Matrix.org Foundation C.I.C.
SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/
import { MatrixEvent } from "matrix-js-sdk/src/matrix";
const UNSIGNED_KEY = "io.element.late_event";
/**
* This metadata describes when events arrive late after a net-split to offer improved UX.
*/
interface UnsignedLateEventInfo {
/**
* Milliseconds since epoch representing the time the event was received by the server
*/
received_ts: number;
/**
* An opaque identifier representing the group the server has put the late arriving event into
*/
group_id: string;
}
/**
* Get io.element.late_event metadata from unsigned as sent by the server.
*
* @experimental this is not in the Matrix spec and needs special server support
* @param mxEvent the Matrix Event to get UnsignedLateEventInfo on
*/
export function getLateEventInfo(mxEvent: MatrixEvent): UnsignedLateEventInfo | undefined {
return mxEvent.getUnsigned()[UNSIGNED_KEY];
}