import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent } from '@angular/common/http';
import { Observable } from 'rxjs';
export declare abstract class AsiRefreshTokenInceptor implements HttpInterceptor {
    private static readonly UNAUTHORIZED;
    private refreshingToken;
    private loginUrl;
    private refreshTokenUrl;
    private refreshTokenSubject;
    constructor();
    intercept(req: HttpRequest<any>, next: HttpHandler): Observable<any>;
    onRequestSuccess(_event: HttpEvent<any>): void;
    /**
     *  Add auth token to the request header
     * @param req  the request
     * @param replay is the token replayed
     */
    abstract addAuthenticationToken(req: HttpRequest<any>, replay: boolean): HttpRequest<any>;
    /**
     *  Get the refresh token endpoint url
     */
    abstract getRefreshTokenUrl(): string;
    /**
     *  Call the refresh token endpoint and save the new token
     */
    abstract callAndSaveRefreshToken(): Observable<any>;
    /**
     * Get the login endpoint url
     */
    abstract getLoginUrl(): string;
    /**
     * Change the current page to the login page
     * @param req the request
     * @param err  the err
     */
    abstract goToLoginPage(req: HttpRequest<any>, err: any): void;
}