import { HttpClient } from '@angular/common/http';
import { Observable } from 'rxjs';
import { BgxLocationService } from '@bgx/services/location';
import { ICurrentNodes, INavigationViews } from './navigation.interfaces';
export declare const navigationPath: string;
export declare class BgxNavigationService {
    private _http;
    private _location;
    navigationViews: Observable<INavigationViews>;
    currentNodes: Observable<ICurrentNodes>;
    constructor(_http: HttpClient, _location: BgxLocationService);
    private fetchNavigationInfo;
    private getNavigationViews;
    private getCurrentNodes;
    /**
     * Compute a mapping from URL to an array of nodes, where the first node in the array
     * is the one that matches the URL and the rest are the ancestors of that node.
     *
     * @param navigation - A collection of navigation nodes that are to be mapped
     */
    private computeUrlToNavNodesMap;
    /**
     * Add tooltip to node if it doesn't have one and have title.
     * If don't want tooltip, specify `"tooltip": ""` in navigation.json
     */
    private ensureHasTooltip;
    private walkNodes;
}