import { StateOperator } from '@ngxs/store';
import { Dictionary } from '../internal';
import { EntityStateModel } from '../models';
import { EntityUpdate, Updater } from '../actions';
export declare type OnUpdate<T> = (current: Readonly<T>, updated: Partial<T>) => T;
/**
 * Updates the given entities in the state.
 * Entities will be merged with the given `onUpdate` function.
 * @param payload the updated entities
 * @param idKey key of the id-field of an entity
 * @param onUpdate update function to call on each entity
 */
export declare function update<T>(payload: EntityUpdate<T>, idKey: string, onUpdate: OnUpdate<T>): StateOperator<EntityStateModel<T>>;
export declare function updateActive<T>(payload: Updater<T>, idKey: string, onUpdate: OnUpdate<T>): (state: EntityStateModel<T>) => {
    entities: Dictionary<T>;
    lastUpdated: number;
    loading: boolean;
    error: Error;
    active: string;
    ids: string[];
    pageSize: number;
    /**
     * Updates the given entities in the state.
     * Entities will be merged with the given `onUpdate` function.
     * @param payload the updated entities
     * @param idKey key of the id-field of an entity
     * @param onUpdate update function to call on each entity
     */
    pageIndex: number;
};
export declare function updateDictionary<T>(entities: Dictionary<T>, entity: Partial<T>, id: string, onUpdate: OnUpdate<T>): Dictionary<T>;