/*!
 * Copyright (c) Microsoft Corporation and contributors. All rights reserved.
 * Licensed under the MIT License.
 */
import type { InternalTypes } from "./exposedInternalTypes.js";
import type { Attendee } from "./presence.js";
/**
 * A function to be called at the end of an update frame
 *
 * @internal
 */
export type PostUpdateAction = () => void;
/**
 * Contract for State Managers as used by a States Workspace (`PresenceStatesImpl`)
 *
 * @remarks
 * See uses of `unbrandIVM`.
 *
 * @internal
 */
export interface ValueManager<TValue, TValueState extends InternalTypes.ValueDirectoryOrState<TValue> = InternalTypes.ValueDirectoryOrState<TValue>> {
    readonly value?: TValueState;
    /**
     * Process an update of `value` for remote attendee.
     * @param attendee - The attendee whose `value` is being updated
     * @param received - The revision number received
     * @param value - The new `value` state
     */
    update(attendee: Attendee, received: number, value: TValueState): PostUpdateAction[];
}
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