import { HttpHandler, HttpInterceptor, HttpRequest } from '@angular/common/http';
import { InjectionToken } from '@angular/core';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export declare const PROGRESS_SERVICE_TOKEN: InjectionToken<ProgressContract>;
export interface ProgressContract {
    show(): void;
    hide(): void;
    update(value: number): void;
    status$(): Observable<boolean>;
    progress$(): Observable<number | null>;
}
export declare class NotifInterceptor implements HttpInterceptor {
    private progressService;
    constructor(progressService: ProgressContract);
    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<import("@angular/common/http").HttpEvent<any>>;
    static ɵfac: i0.ɵɵFactoryDeclaration<NotifInterceptor, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<NotifInterceptor>;
}