import { HttpClient } from "@angular/common/http";
export declare class FileUtils {
    static readonly base64: RegExp;
    protected static readonly blobCache: Map<string, Promise<Blob>>;
    protected static readBlob(http: HttpClient, url: string): Promise<Blob>;
    static getExtension(file: File): string;
    static getName(file: File): string;
    static toFile(blob: Blob, fileName: string): File;
    static dataToBlob(data: string): Blob;
    static saveBlob(blob: Blob, fileName: string): void;
    static saveJson(json: any, fileName: string): void;
    static readFileAsText(file: Blob): Promise<string>;
    static readFileAsBinaryString(file: Blob): Promise<string>;
    static readFileAsDataURL(file: Blob): Promise<string>;
    static base64ToBlob(base64: string, mimeType?: string): Blob;
    static readBlobFromUrl(http: HttpClient, url: string): Promise<Blob>;
    static readDataFromUrl(http: HttpClient, url: string): Promise<string>;
    static getVideoCover(file: File, seekTo?: number, quality?: number): Promise<string>;
    static getFilePreview(file: File): Promise<string>;
    private static readFile;
}