import { TerraUploadItem } from './terra-upload-item';
import { TerraUploadProgress } from './terra-upload-progress';
import { BehaviorSubject, Observable } from 'rxjs';
export declare type UploadQueueUrlFactory = (storageKey: string) => string;
export declare class TerraUploadQueue {
    private _uploadUrl;
    private _uploadMethod;
    progress: Observable<number>;
    inProgress: Promise<void>;
    status: BehaviorSubject<TerraUploadProgress>;
    private _items;
    private _size;
    private _progressListeners;
    private _progressValue;
    constructor(_uploadUrl: string | UploadQueueUrlFactory, _uploadMethod?: 'GET' | 'POST' | 'DELETE' | 'PUT');
    add(item: TerraUploadItem): TerraUploadQueue;
    remove(item: TerraUploadItem): TerraUploadQueue;
    startUpload(): Promise<void>;
    private _uploadAllItems;
    private _uploadItem;
    private _onProgress;
    private _parseHeaders;
    private _getUploadUrl;
}