import { OnDestroy } from '@angular/core';
import { Observable } from 'rxjs';
import * as i0 from "@angular/core";
export interface EntityChangeEvent {
    entity: string;
    action: 'create' | 'update' | 'delete';
    data: any;
}
export declare class RealtimeService implements OnDestroy {
    private socket;
    private connectionState$;
    private entityChange$;
    constructor();
    connect(url: string, token: string): void;
    disconnect(): void;
    getConnectionState(): Observable<boolean>;
    getEntityChanges(): Observable<EntityChangeEvent>;
    onEntityChanged(entityName: string): Observable<EntityChangeEvent>;
    ngOnDestroy(): void;
    static ɵfac: i0.ɵɵFactoryDeclaration<RealtimeService, never>;
    static ɵprov: i0.ɵɵInjectableDeclaration<RealtimeService>;
}