import { Dispatch, SetStateAction } from "react";
import { ApolloQueryResult } from "apollo-client/core/types";
import { FetchResult } from "apollo-link";
import { Loading, LoadingActions } from "./types";
/**
 * A simple wrapper for Apollo fetching operations that handles the `loading` state as side effect.
 *
 * @param loadingHandler: function that handle the loading state.
 * @param apolloQuery: Apollo Query or Mutation
 */
export declare const apolloFetchingHandler: <ListSearchRecordsResponse = any>(loadingHandler: (flag: boolean) => void, apolloQuery: () => Promise<ApolloQueryResult<ListSearchRecordsResponse> | FetchResult<ListSearchRecordsResponse>>) => Promise<ApolloQueryResult<ListSearchRecordsResponse> | FetchResult<ListSearchRecordsResponse>>;
/**
 * A simple function to handle `loading` state.
 *
 * @param action: the `action` that has been performed.
 * @param setState: the logic to update the loading state.
 */
export declare const loadingHandler: (action: LoadingActions, setState?: Dispatch<SetStateAction<Loading<LoadingActions>>>) => (flag: boolean) => void;
/**
 * A data loader wrapper that manages the loading state via a callback.
 * `loader` can be any function that returns a Promise.
 */
export declare function dataLoader<T>(loadingHandler: (flag: boolean) => void, loader: () => Promise<T>): Promise<T>;