import type { HttpEvent, HttpHandler, HttpInterceptor, HttpRequest } from "@angular/common/http";
import type { Observable } from "rxjs";
import * as i0 from "@angular/core";
export declare class SessionActivityHttpInterceptor implements HttpInterceptor {
    private readonly bootstrappedAt;
    private cooldownUntil;
    private readonly sessionTimeout;
    private readonly leaderElection;
    private readonly document;
    intercept(req: HttpRequest<unknown>, next: HttpHandler): Observable<HttpEvent<unknown>>;
    private shouldTreatAsActivity;
    private matchesAllowlist;
    private matchesHeaderFlag;
    private resolveContextFlag;
    private isDocumentFocused;
    private matches;
    private isTruthy;
    static ɵfac: i0.ɵɵFactoryDeclaration<SessionActivityHttpInterceptor, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<SessionActivityHttpInterceptor>;
}