import { Command as CommandBase } from '@oclif/command';
import { ProgressCallback } from './progress';
import { IRequestFactory } from './request';
/**
 * Command constructor.
 */
export declare abstract class Command extends CommandBase {
    /**
     * Init function.
     *
     * @returns Returns the parent init.
     */
    init(): Promise<any>;
    /**
     * Check if the shell is interactive.
     *
     * @returns True if interactive shell, else false.
     */
    protected _isInteractive(): boolean;
    /**
     * Init a request factory with the specified timeout.
     *
     * @param timeout Timeout duraction in milliseconds.
     * @returns Request factory.
     */
    protected _initRequest(timeout?: number): IRequestFactory;
    /**
     * Read input file to list all URL's line by line.
     *
     * @param filepath Input file.
     * @returns URL list.
     */
    protected _readInputFile(filepath: string): Promise<string[]>;
    /**
     * Transfer seconds human readable.
     *
     * @param ms Milliseconds passed or null.
     * @returns Formatted string.
     */
    protected _transferSecondsHuman(ms: number | null): string;
    /**
     * Transfer bytes human readable.
     *
     * @param size Byte size.
     * @returns Formatted string.
     */
    protected _transferBytesHuman(size: number): string;
    /**
     * Init data transfer progress output function.
     *
     * @returns Progress update callback function.
     */
    protected _transferProgressOutputInit(): ProgressCallback;
    /**
     * Clear data transfer progress output after.
     */
    protected _transferProgressOutputAfter(): void;
}