export type FileType = 'link' | 'image' | 'txt' | 'doc' | 'xls' | 'pdf' | 'csv' | 'html' | 'json' | 'mp4' | 'mkv' | 'compressed' | 'unknown';
export type FormattedFile = {
    name: string;
    type: string;
    size: number;
    webkitRelativePath: string;
    fileType: FileType;
    file: File;
    imgPreviewURL?: string;
    uploadProgress?: number;
    controller?: AbortController;
    isCanceled?: boolean;
};
/**
 * Maps a mime type to a custom file type.
 *
 * @param {string} mimeType
 * @returns {CustomFileType}
 */
export declare const getFileType: (mimeType: string) => FileType;
/**
 * Formats a file into a FormattedFile object.
 *
 * @param file The file to be formatted.
 * @returns A FormattedFile object.
 */
export declare const formatFile: (file: File) => FormattedFile;
/**
 * Checks if a file is under the maximum size limit.
 *
 * @param file The file to be checked.
 * @param customFileSize The maximum size limit in megabytes. @default 1
 * @returns True if the file is under the maximum size limit, false otherwise.
 */
export declare const validateFileSize: (file: File, customFileSize?: number) => boolean;
/**
 * Checks if a file has a valid type.
 * Make sure user doesn't upload a folder.
 *
 * @param file The file to be checked.
 * @returns True if the file has a valid type, false otherwise.
 */
export declare const validateFileType: (file: File) => boolean;