import { Request as ERequest, Response as EResponse } from "express";
import AsyncResponse from "./async.response";
/**
 * This interface defines the currently available options for files.
 */
export interface FileOptions {
    width: number;
    height?: number;
}
/**
 * Generation of a File response.
 */
export default class FileResponse extends AsyncResponse {
    private readonly path;
    private _contentType?;
    private _fileName;
    private _options?;
    constructor(path: string);
    /**
     * Set the content type of the response.
     * @param value the content type
     */
    contentType: string;
    /**
     * Set the name of the file to download
     * @param value the name of the file
     */
    fileName: string;
    /**
     * Set the file options, to correctly generate the response.
     * @param value the FileOptions
     */
    options: FileOptions;
    private download;
    /**
     * Generation of the response.
     * This method can eventually perform some transformation on output if a
     * FileOptions was specified.
     */
    asyncResponse(_: ERequest, res: EResponse): Promise<void>;
}