import { Collection } from './collection/index.js';
import { CollectionStatus } from './types.js';
/**
 * Shared helpers for the first-party framework adapters (`@tanstack/react-db`,
 * `@tanstack/vue-db`, `@tanstack/svelte-db`, `@tanstack/solid-db`,
 * `@tanstack/angular-db`).
 *
 * These centralize small pieces of logic every adapter used to duplicate, so
 * they stay consistent across frameworks. They are intended for the official
 * adapters; treat them as unstable for external use.
 */
/**
 * Structural check for a live-query/`Collection` instance.
 *
 * Uses duck typing rather than `instanceof CollectionImpl` on purpose: adapters
 * and core can resolve to different copies of `@tanstack/db` (dual-package /
 * multi-realm), where `instanceof` gives false negatives. The three methods
 * below uniquely identify a Collection.
 */
export declare function isCollection(value: unknown): value is Collection<any, any, any>;
/** Whether a collection yields a single result (`findOne`) rather than an array. */
export declare function isSingleResultCollection(collection: Collection<any, any, any>): boolean;
/** The derived boolean status flags every adapter exposes for a query. */
export interface LiveQueryStatusFlags {
    isLoading: boolean;
    isReady: boolean;
    isIdle: boolean;
    isError: boolean;
    isCleanedUp: boolean;
}
/**
 * Derive the boolean status flags from a collection status. Adapters represent
 * a disabled query separately (with `isReady: true`); this covers the real
 * `CollectionStatus` values.
 */
export declare function getLiveQueryStatusFlags(status: CollectionStatus): LiveQueryStatusFlags;