import type { MaybeRefOrGetter } from 'vue';
import type { Resource } from '@opencloud-eu/web-client';
/** A write to the open file that did not come from this tab. */
export interface ExternalFileEvent {
    /** The etag the file carries after the write, as announced by the server. */
    etag: string;
}
export interface ExternalFileUpdatesOptions {
    resource: MaybeRefOrGetter<Resource | undefined>;
    /** The etag this client believes is on disk. */
    currentETag: MaybeRefOrGetter<string>;
    /** Whether an event may be handled right now. Events arriving while false are dropped. */
    isActive: MaybeRefOrGetter<boolean>;
    /**
     * Handles one event. Runs one at a time; an event arriving meanwhile runs
     * afterwards, and a newer one replaces it.
     */
    onExternalEvent: (event: ExternalFileEvent) => Promise<void>;
}
/**
 * Listens for server-sent file events about one resource and hands the ones
 * that mean "someone else wrote this file" to the caller, one at a time.
 *
 * Only a signed-in user has an SSE stream.
 */
export declare function useExternalFileUpdates({ resource, currentETag, isActive, onExternalEvent }: ExternalFileUpdatesOptions): void;