import { Observable } from 'rxjs';
import { HttpClient } from '@angular/common/http';
import * as i0 from "@angular/core";
export declare class WebSocketService {
    http: HttpClient;
    private socket;
    private messageSubject;
    pingIntervalId: any;
    clientId: any;
    constructor(http: HttpClient);
    connect(url: string): void;
    sendMessage(message: any): void;
    getMessages(): Observable<any>;
    startClientPing(): void;
    closeConnection(): void;
    getJWTToken(): Observable<any>;
    static ɵfac: i0.ɵɵFactoryDeclaration<WebSocketService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<WebSocketService>;
}
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