/// <reference types="node" />
/// <reference types="multer" />
/// <reference types="node" />
import stream from "stream";
import { TransactionBaseService } from "./transaction-base-service";
export declare type FileServiceUploadResult = {
    url: string;
};
export declare type FileServiceGetUploadStreamResult = {
    writeStream: stream.PassThrough;
    promise: Promise<any>;
    url: string;
    fileKey: string;
    [x: string]: unknown;
};
export declare type GetUploadedFileType = {
    fileKey: string;
    [x: string]: unknown;
};
export declare type DeleteFileType = {
    fileKey: string;
    [x: string]: unknown;
};
export declare type UploadStreamDescriptorType = {
    name: string;
    ext?: string;
    acl?: string;
    [x: string]: unknown;
};
export interface IFileService extends TransactionBaseService {
    /**
     * upload file to fileservice
     * @param file Multer file from express multipart/form-data
     * */
    upload(file: Express.Multer.File): Promise<FileServiceUploadResult>;
    /**
     * upload private file to fileservice
     * @param file Multer file from express multipart/form-data
     * */
    uploadProtected(file: Express.Multer.File): Promise<FileServiceUploadResult>;
    /**
     * remove file from fileservice
     * @param fileData Remove file described by record
     * */
    delete(fileData: DeleteFileType): Promise<void>;
    /**
     * upload file to fileservice from stream
     * @param fileData file metadata relevant for fileservice to create and upload the file
     * @param fileStream readable stream of the file to upload
     * */
    getUploadStreamDescriptor(fileData: UploadStreamDescriptorType): Promise<FileServiceGetUploadStreamResult>;
    /**
     * download file from fileservice as stream
     * @param fileData file metadata relevant for fileservice to download the file
     * @returns readable stream of the file to download
     * */
    getDownloadStream(fileData: GetUploadedFileType): Promise<NodeJS.ReadableStream>;
    /**
     * Generate a presigned download url to obtain a file
     * @param fileData file metadata relevant for fileservice to download the file
     * @returns presigned url to download the file
     * */
    getPresignedDownloadUrl(fileData: GetUploadedFileType): Promise<string>;
}
export declare abstract class AbstractFileService extends TransactionBaseService implements IFileService {
    abstract upload(fileData: Express.Multer.File): Promise<FileServiceUploadResult>;
    abstract uploadProtected(fileData: Express.Multer.File): Promise<FileServiceUploadResult>;
    abstract delete(fileData: DeleteFileType): Promise<void>;
    abstract getUploadStreamDescriptor(fileData: UploadStreamDescriptorType): Promise<FileServiceGetUploadStreamResult>;
    abstract getDownloadStream(fileData: GetUploadedFileType): Promise<NodeJS.ReadableStream>;
    abstract getPresignedDownloadUrl(fileData: GetUploadedFileType): Promise<string>;
}
export declare const isFileService: (object: unknown) => boolean;