/**
 * File Utils
 * File utility functions for common operations
 */
/**
 * File utility functions
 */
export declare class FileUtils {
    /**
     * Format file size in bytes to human-readable format
     */
    static formatFileSize(bytes: number): string;
    /**
     * Generate unique filename with timestamp
     */
    static generateUniqueFilename(filename: string): string;
    /**
     * Sanitize filename by removing invalid characters
     */
    static sanitizeFilename(filename: string): string;
    /**
     * Join path segments
     */
    static joinPaths(...segments: string[]): string;
    /**
     * Get file extension from filename
     */
    static getFileExtension(filename: string): string;
    /**
     * Check if file extension is allowed
     */
    static isAllowedExtension(filename: string): boolean;
    /**
     * Get filename from URI
     */
    static getFilenameFromUri(uri: string): string;
    /**
     * Validate file size
     */
    static isValidFileSize(size: number): boolean;
}