import type { ArkmePrivateInteraction, ArkmeSourceItem } from '../types.js';
export interface ArkmePrivateInteractionProjection {
    latest: ArkmePrivateInteraction;
    unreadCount: number;
    attentionCount: number;
    version: string;
}
/**
 * Collapse occurrence pages into one deterministic projection per private
 * contact. The counts remain separate from direct-message unreadCount.
 */
export declare function projectPrivateInteractions(items: readonly ArkmePrivateInteraction[], version: string): ReadonlyMap<string, ArkmePrivateInteractionProjection>;
/** Apply a fresh server snapshot to the current (direct-message) directory. */
export declare function applyPrivateInteractionDirectory(sources: readonly ArkmeSourceItem[], projections: ReadonlyMap<string, ArkmePrivateInteractionProjection>): ArkmeSourceItem[];
export declare function privateInteractionPreview(item: ArkmePrivateInteraction): string;
/** Server directory rows carry complete per-contact counts, even on page one. */
export declare function mergePrivateInteractionSources(sources: readonly ArkmeSourceItem[], interactionRows: readonly ArkmeSourceItem[], excludedKeys?: ReadonlySet<string>): ArkmeSourceItem[];
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