import { User } from '../models';
/**
 * Represents an entity that can be viewed by users.
 *
 * - `_viewedBy`: stores IDs of users who viewed the entity.
 * - `views`: computed total number of views.
 * - `viewedBy`: optional populated list of User objects.
 */
export type IsViewable = {
    _viewedBy?: string[];
    views?: number;
    viewedBy?: User[];
    addView(accountId: string): Promise<number>;
    removeView(accountId: string): Promise<number>;
    hasViewed(accountId: string): boolean;
};