/// <reference types="node" />
import { EventEmitter } from 'events';
import { Readable } from 'stream';
import fse from 'fs-extra';
import { HashEncoding, IHash, IRequestStream, IZipItterEntry, OnData, OnResponse } from './types';
/**
 * Like array filter method, but with asyncronous callback.
 *
 * @param list The array to filter.
 * @param filter Filter function.
 * @returns Filtered array.
 */
export declare function arrayFilterAsync<T>(list: T[], filter: (entry: T) => Promise<any>): Promise<T[]>;
/**
 * Like array map method, but with asyncronous callback.
 *
 * @param list The array to map.
 * @param map Map function.
 * @returns Mapped array.
 */
export declare function arrayMapAsync<T, U>(list: T[], map: (entry: T) => Promise<U>): Promise<U[]>;
/**
 * Promise for event emitter object to end successfully or in an error.
 *
 * @param obj Event emitter.
 * @param end The end event name.
 */
export declare function streamEndError(obj: EventEmitter, end: string): Promise<void>;
/**
 * Catch promise on error and return default value.
 *
 * @param p Promise object.
 * @param d Default value.
 * @returns Resulting value.
 */
export declare function promiseCatch<T, U>(p: Promise<T>, d: U): Promise<T | U>;
/**
 * Promise for lstating a path, null on error.
 *
 * @param path File path.
 * @returns Stat object or null.
 */
export declare function lstatExists(path: string): Promise<fse.Stats | null>;
/**
 * Read directory, optional skip dot files, sorted order.
 *
 * @param path Path to the directory to list.
 * @param dotfile Include dot files in the list or not.
 * @returns Directory list, sorted order.
 */
export declare function readDir(path: string, dotfile?: boolean): Promise<string[]>;
/**
 * Hash file using the specified algoithm.
 *
 * @param path File path.
 * @param algorithm Hash algorithm.
 * @param encoding Digest encoding.
 * @returns Hash digest.
 */
export declare function hashFile(path: string, algorithm: string, encoding: HashEncoding): Promise<string>;
/**
 * Normalize a hash string based on the encoding.
 *
 * @param hash Hash value.
 * @param encoding Hash encoding.
 * @returns Normalized hash.
 */
export declare function hashNormalize(hash: string, encoding: HashEncoding): string;
/**
 * Hash file using the specified algoithms.
 *
 * @param path File path.
 * @param hashes Hash list.
 */
export declare function fileHash(path: string, hashes: IHash[]): Promise<void>;
/**
 * Verify file hash list using the specified algoithms.
 *
 * @param path File path.
 * @param hashes Hash list.
 */
export declare function fileHashVerify(path: string, hashes: IHash[]): Promise<void>;
/**
 * Verify file size or throw error.
 *
 * @param path File path.
 * @param size Expected size.
 */
export declare function fileSizeVerify(path: string, size: number): Promise<void>;
/**
 * Sort entries on dependencies listed for each entry.
 * Sorts the array in-place.
 *
 * @param list The array to sort.
 * @param deps Get the list of dependencies for each entry.
 * @returns Sorted array.
 */
export declare function dependSort<T>(list: T[], deps: (entry: T) => T[]): T[];
/**
 * Stream verifier.
 *
 * @param source Request stream.
 * @param endEvent The end event name.
 * @param size Expected size.
 * @param hashes Expected hashes.
 * @param onData Data event handler, can throw to cancel download.
 */
export declare function streamVerify(source: Readable, endEvent: string, size?: number | null, hashes?: IHash[] | null, onData?: OnData | null): Promise<void>;
/**
 * Stream a request stream to a specified directory.
 *
 * @param source Request stream.
 * @param size Expected size.
 * @param hashes Expected hashes.
 * @param onResponse Response event handler, can throw to cancel download.
 * @param onData Data event handler, can throw to cancel download.
 */
export declare function streamRequest(source: IRequestStream, size?: number | null, hashes?: IHash[] | null, onResponse?: OnResponse | null, onData?: OnData | null): Promise<void>;
/**
 * Write a request stream to a specified file.
 *
 * @param source Request stream.
 * @param path File path.
 * @param size Expected size.
 * @param hashes Expected hashes.
 * @param onResponse Response event handler, can throw to cancel download.
 * @param onData Data event handler, can throw to cancel download.
 */
export declare function streamRequestDownload(source: IRequestStream, path: string, size?: number | null, hashes?: IHash[] | null, onResponse?: OnResponse | null, onData?: OnData | null): Promise<void>;
/**
 * Write a ZIP entry to a specified file.
 *
 * @param entry ZIP entry.
 * @param path File path.
 * @param size Expected size.
 * @param hashes Expected hashes.
 * @param onData Data event handler, can throw to cancel download.
 */
export declare function zipEntryExtract(entry: IZipItterEntry, path: string, size?: number | null, hashes?: IHash[] | null, onData?: OnData | null): Promise<void>;