import { BiFunction, EqualsPredicate } from '@acoustic-content-sdk/utils';
import { UnaryFunction } from 'rxjs';
import { ItemWithLinkedDocId } from '../draft/draft.utils';
/**
 * Reducer function that adds an item to a record
 */
export declare type AddRecordReducer<T> = BiFunction<Record<string, T>, T, Record<string, T>>;
/**
 * Reducer function that adds an item to a record
 */
export declare type RemoveRecordReducer<T> = BiFunction<Record<string, T>, string, Record<string, T>>;
/**
 * Reducer function that updates an item
 */
export declare type ItemReducer<T> = BiFunction<T, T, T>;
/**
 * Creates a reducer that adds an item to a record
 *
 * @param aKey - function to extract the key from the item
 * @param aPredicate - predicate to check if two items are equal
 *
 * @returns the reducer
 */
export declare function updateRecord<T>(aKey: UnaryFunction<T, string>, aPredicate?: EqualsPredicate<T>): AddRecordReducer<T>;
/**
 * Creates a reducer that removes a key from a record
 *
 * @returns the reducer
 */
export declare function removeRecord<T>(): RemoveRecordReducer<T>;
export declare function updateSingleItem<T>(aPredicate?: EqualsPredicate<T>): ItemReducer<T>;
export interface ItemWithId {
    id?: string;
}
export interface ItemWithRevision extends ItemWithId {
    rev?: string;
}
export declare function equalsByRevision(aLeft: ItemWithRevision, aRight: ItemWithRevision): boolean;
/**
 * Extract the delivery ID of the draft
 *
 * @param item - the item
 * @returns the delivery version of the ID
 */
export declare const keyById: UnaryFunction<ItemWithLinkedDocId, string>;
export declare const updateItemsWithRevision: <T extends ItemWithRevision>(aState: Record<string, T>, aItem: T) => Record<string, T>;