import { ExecutionContext } from "@nestjs/common";
import { FileData } from "../classes/FileData";
import { IFileSaver, IS3FileSaverOptions, S3FileDataOptions } from "../interfaces/file.interface";
export declare class S3FileSaver implements IFileSaver {
    private readonly fileUploadOptions;
    private readonly s3Client;
    /**
     * Initializes a new instance of the S3FileSaver class.
     * Sets up the S3 client using the provided configuration options.
     * @param fileUploadOptions - configuration options for S3 file uploads.
     */
    constructor(fileUploadOptions: IS3FileSaverOptions);
    /**
     * Uploads the provided file data to S3.
     * @param file - The file data to upload.
     * @param options - Optional S3-specific file data options.
     * @returns A promise that resolves to the URL of the uploaded file.
     * @throws InternalServerErrorException if the bucket is not provided.
     */
    private uploadToS3;
    /**
     * Uploads the provided file data to S3.
     * @param fileData - The file data to upload.
     * @param context - The execution context, typically provided by NestJS.
     * @param options - Optional S3-specific file data options.
     * @returns A promise that resolves to the URL of the uploaded file.
     */
    save(fileData: FileData, context: ExecutionContext, options?: S3FileDataOptions): Promise<string>;
    /**
     * Uploads multiple files to S3.
     * This method is a wrapper around the map method of the array.
     * It takes an array of FileData and maps each file to its save method.
     * The result is an array of strings, where each string is the file path
     * where the respective file was saved.
     * @param files - The array of file data to save.
     * @param context - The execution context, typically provided by NestJS.
     * @param options - Optional S3-specific file data options.
     * @returns A promise that resolves to an array of file paths where the files were saved.
     * @throws InternalServerErrorException if any of the files failed to upload.
     */
    saveMany(files: FileData[], context: ExecutionContext, options?: S3FileDataOptions): Promise<string[]>;
}