import { OnDestroy } from '@angular/core';
import { Observable } from 'rxjs';
import { AjaxRequestConfig, AjaxResponse } from './ajax';
import { UploadState, UploadxControlEvent } from './interfaces';
import { UploadxFactoryOptions, UploadxOptions } from './options';
import { Uploader } from './uploader';
import * as i0 from "@angular/core";
export declare const UPLOAD_STATE_KEYS: (keyof UploadState)[];
export declare class UploadxService implements OnDestroy {
    /** Upload Queue */
    queue: Uploader[];
    readonly options: UploadxFactoryOptions;
    private readonly eventsStream;
    private subs;
    private ngZone;
    readonly ajax: import("./ajax").Ajax;
    private idService;
    constructor();
    /** Upload status events */
    get events(): Observable<UploadState>;
    /**
     * Initializes service
     * @param options global module options
     * @returns Observable that emits a new value on progress or status changes
     */
    init(options?: UploadxOptions): Observable<UploadState>;
    /**
     * Initializes service
     * @param options global module options
     * @returns Observable that emits the current array of uploaders
     */
    connect(options?: UploadxOptions): Observable<Uploader[]>;
    /**
     * Terminates all uploads and clears the queue
     */
    disconnect(): void;
    /**
     * Returns current uploads state
     * @example
     * // restore background uploads
     * this.uploads = this.uploadService.state();
     */
    state(): UploadState[];
    ngOnDestroy(): void;
    /**
     * Creates uploaders for files and adds them to the upload queue
     */
    handleFiles(files: FileList | File | File[], options?: UploadxOptions): void;
    /**
     * Upload control
     * @example
     * // pause all
     * this.uploadService.control({ action: 'pause' });
     * // pause upload with uploadId
     * this.uploadService.control({ action: 'pause', uploadId});
     * // set token
     * this.uploadService.control({ token: `TOKEN` });
     */
    control(evt: UploadxControlEvent): void;
    /**
     * Number of active uploads
     */
    get activeUploadsCount(): number;
    /**
     * Performs http requests
     */
    request<T = string>(config: AjaxRequestConfig): Promise<AjaxResponse<T>>;
    private stateChange;
    private addUploaderInstance;
    private processQueue;
    static ɵfac: i0.ɵɵFactoryDeclaration<UploadxService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<UploadxService>;
}