import type { DocumentVersion, PublishEvent, UnpublishEvent } from '@pantheon-systems/css-client';
export type VersionKind = 'current' | 'published' | 'reverted' | 'autosave' | 'unpublished';
export declare const VERSION_KIND_META: Record<VersionKind, {
    tag: string | null;
    badgeClass: string;
    milestone: boolean;
}>;
/**
 * Returns all applicable display kinds for a version.
 * current, published, and reverted are independent labels that can coexist.
 * Returns ['autosave'] when none of the three apply.
 */
export declare function versionKinds(version: DocumentVersion, currentVersionId: string | undefined): VersionKind[];
/**
 * Returns true for versions that represent a meaningful milestone:
 * published checkpoints and revert points.
 */
export declare function isMilestone(version: DocumentVersion): boolean;
/** A time the page was published to or unpublished from live. */
export type LiveEvent = UnpublishEvent | PublishEvent;
/** A row in version history: a version, or a live event. */
export type HistoryEntry = DocumentVersion | LiveEvent;
export declare function isLiveEvent(entry: HistoryEntry): entry is LiveEvent;
export declare function liveEventTime(event: LiveEvent): string;
export declare function entryTime(entry: HistoryEntry): string;
/** Every publish but each version's first, which the version's own row already stands for. */
export declare function laterPublishes(publishes?: PublishEvent[]): PublishEvent[];
/**
 * Newest-first versions with live events slotted in by time, newest first.
 * Version order is kept as given, and events are never filtered out.
 */
export declare function withLiveEvents(versions: DocumentVersion[], events?: LiveEvent[]): HistoryEntry[];