import type { FileLoader } from './loaders/fileloader';
type ExternalImportMap = Record<string, string>;
type DownloadJob<TFile> = {
    downloadedUris: Set<string>;
    url: string;
    options: RequestInit;
};
/**
 * Downloads the transitive closure of a set of model files.
 * @memberof module:concerto-core
 */
declare class FileDownloader<TFile = unknown> {
    fileLoader: FileLoader<TFile>;
    getExternalImports: (file: TFile) => ExternalImportMap;
    concurrency: number;
    /**
     * Create a FileDownloader and bind to a FileLoader.
     * @param fileLoader - the loader to use to download model files
     * @param getExternalImports - a function taking a file and returning new files
     * @param concurrency - the number of model files to download concurrently
     */
    constructor(fileLoader: FileLoader<TFile>, getExternalImports: (file: TFile) => ExternalImportMap, concurrency?: number);
    /**
     * Download all external dependencies for an array of model files
     * @param files - the model files
     * @param options - Options object passed to FileLoaders
     * @return a promise that resolves to Files[] for the external model files
     */
    downloadExternalDependencies(files: TFile[], options?: RequestInit): Promise<TFile[]>;
    /**
     * Execute a Job
     * @param job - the job to execute
     * @param fileLoader - the loader to use to download model files.
     * @return a promise to the job results
     */
    runJob(job: DownloadJob<TFile>, fileLoader: FileLoader<TFile>): Promise<TFile[]>;
}
export = FileDownloader;