import { Injector } from "@angular/core";
import { HttpInterceptor, HttpEvent, HttpRequest, HttpHandler } from "@angular/common/http";
import { Observable } from "rxjs";
import * as i0 from "@angular/core";
export declare class AppInterceptorService implements HttpInterceptor {
    private readonly injector;
    private isRefreshing;
    private refreshTokenSubject;
    userId: string;
    appId: string;
    private _tokenService;
    constructor(injector: Injector);
    intercept(httpRequest: HttpRequest<any>, next: HttpHandler): Observable<HttpEvent<any>>;
    private handle401AccessTokenError;
    private addTokenHeader;
    static ɵfac: i0.ɵɵFactoryDeclaration<AppInterceptorService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<AppInterceptorService>;
}