import { FileUploadOptions } from '../interfaces/file-upload-options.interface';
/**
 * 文件上传装饰器元数据键
 */
export declare const FILE_UPLOAD_OPTIONS = "file_upload_options";
/**
 * 统一的文件上传装饰器
 *
 * @example
 * ```typescript
 * @Post('upload')
 * @FileUpload({ types: [FileType.Image, FileType.PDF] })
 * async upload(@UploadedFile() file: Express.Multer.File) {
 *   return { url: file.path };
 * }
 * ```
 */
export declare function FileUpload(options?: FileUploadOptions): MethodDecorator;
/**
 * 静态快捷方法命名空间
 */
export declare namespace FileUpload {
    /**
     * 图片上传
     * @example
     * ```typescript
     * @Post('photos')
     * @FileUpload.Image()
     * async uploadPhoto(@UploadedFile() file: Express.Multer.File) {
     *   return { url: file.path };
     * }
     * ```
     */
    function Image(options?: Partial<FileUploadOptions>): MethodDecorator;
    /**
     * 头像上传（带默认图片处理）
     * @example
     * ```typescript
     * @Post('users/:id/avatar')
     * @FileUpload.Avatar()
     * async uploadAvatar(@UploadedFile() file: Express.Multer.File) {
     *   return { url: file.path };
     * }
     * ```
     */
    function Avatar(options?: Partial<FileUploadOptions>): MethodDecorator;
    /**
     * 文档上传
     * @example
     * ```typescript
     * @Post('documents')
     * @FileUpload.Document()
     * async uploadDocument(@UploadedFile() file: Express.Multer.File) {
     *   return { url: file.path };
     * }
     * ```
     */
    function Document(options?: Partial<FileUploadOptions>): MethodDecorator;
    /**
     * PDF 上传
     */
    function PDF(options?: Partial<FileUploadOptions>): MethodDecorator;
    /**
     * Excel 上传
     */
    function Excel(options?: Partial<FileUploadOptions>): MethodDecorator;
    /**
     * CSV 上传
     */
    function CSV(options?: Partial<FileUploadOptions>): MethodDecorator;
    /**
     * 视频上传
     */
    function Video(options?: Partial<FileUploadOptions>): MethodDecorator;
    /**
     * 音频上传
     */
    function Audio(options?: Partial<FileUploadOptions>): MethodDecorator;
    /**
     * 公开访问的文件上传
     */
    function Public(options?: Partial<FileUploadOptions>): MethodDecorator;
}