import { StorageInterface } from "@sentclose/sentc-common";
import { User } from "../User";
import { FileMetaInformation, PartListItem } from "../Enities";
export declare class Downloader {
    private base_url;
    private app_token;
    private user;
    private group_id?;
    private readonly group_as_member?;
    private static init_storage;
    private static is_init;
    private static storage;
    private static mutex;
    static cancel_download: boolean;
    static getStorage(): Promise<StorageInterface>;
    static reset(): Promise<void>;
    static init(): void;
    constructor(base_url: string, app_token: string, user: User, group_id?: string, group_as_member?: string);
    /**
     * Get the file info and the first page of the file part list
     *
     * @param file_id
     */
    downloadFileMetaInformation(file_id: string): Promise<FileMetaInformation>;
    /**
     * Download the rest of the part list via pagination
     *
     * @param file_id
     * @param last_item
     */
    downloadFilePartList(file_id: string, last_item?: PartListItem | null): Promise<PartListItem[]>;
    downloadFileParts(part_list: PartListItem[], content_key: string): Promise<string>;
    downloadFileParts(part_list: PartListItem[], content_key: string, updateProgressCb: (progress: number) => void): Promise<string>;
    downloadFileParts(part_list: PartListItem[], content_key: string, updateProgressCb: (progress: number) => void | undefined, verify_key: string): Promise<string>;
}