import { HttpInterceptor, HttpRequest, HttpHandler, HttpEvent } from '@angular/common/http';
import { Observable } from 'rxjs';
import { KeycloakService } from '../services/keycloak.service';
import * as i0 from "@angular/core";
/**
 * This interceptor includes the bearer by default in all HttpClient requests.
 *
 * If you need to exclude some URLs from adding the bearer, please, take a look
 * at the {@link KeycloakOptions} bearerExcludedUrls property.
 *
 * @deprecated KeycloakBearerInterceptor is deprecated and will be removed in future versions.
 * Use the new functional interceptor such as `includeBearerTokenInterceptor`.
 * More info: https://github.com/mauriciovigolo/keycloak-angular/docs/migration-guides/v19.md
 */
export declare class KeycloakBearerInterceptor implements HttpInterceptor {
    private keycloak;
    constructor(keycloak: KeycloakService);
    /**
     * Calls to update the keycloak token if the request should update the token.
     *
     * @param req http request from @angular http module.
     * @returns
     * A promise boolean for the token update or noop result.
     */
    private conditionallyUpdateToken;
    /**
     * @deprecated
     * Checks if the url is excluded from having the Bearer Authorization
     * header added.
     *
     * @param req http request from @angular http module.
     * @param excludedUrlRegex contains the url pattern and the http methods,
     * excluded from adding the bearer at the Http Request.
     */
    private isUrlExcluded;
    /**
     * Intercept implementation that checks if the request url matches the excludedUrls.
     * If not, adds the Authorization header to the request if the user is logged in.
     *
     * @param req
     * @param next
     */
    intercept(req: HttpRequest<unknown>, next: HttpHandler): Observable<HttpEvent<unknown>>;
    /**
     * Adds the token of the current user to the Authorization header
     *
     * @param req
     * @param next
     */
    private handleRequestWithTokenHeader;
    static ɵfac: i0.ɵɵFactoryDeclaration<KeycloakBearerInterceptor, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<KeycloakBearerInterceptor>;
}