import { INavPage } from '../components/Nav/index';
import { ISiteDefinition } from './SiteDefinition.types';
/**
 * Returns whether the given page URL or hash route is active.
 * Non-hash URLs are assumed to be external and therefore never active since the current component
 * implementations in this package assume hash routing in many places.
 * @param pageUrl URL or hash route for a page
 * @param currentPath Optional current normalized path (optimization if calling this multiple times)
 */
export declare function isPageActive(pageUrl: string, currentPath?: string): boolean;
/**
 * Returns whether the given page or a child (for the current platform, if provided) is active.
 * @param page Page to check
 * @param platform Current platform
 * @param currentPath Optional current normalized path (optimization if calling this multiple times)
 */
export declare function hasActiveChild<TPlatforms extends string = string>(page: INavPage<TPlatforms>, platform?: TPlatforms, currentPath?: string): boolean;
/**
 * Checks if any of the pages in the object (either site definition or nav page) are active or have
 * an active child (for the current platform, if provided), and returns the active page if found.
 * @param parent Page or site definition to check
 * @param platform Current platform
 * @param currentPath Optional current normalized path (optimization if calling this multiple times)
 */
export declare function getActivePage<TPlatforms extends string = string>(parent: INavPage<TPlatforms> | ISiteDefinition<TPlatforms>, platform?: TPlatforms, currentPath?: string): INavPage<TPlatforms> | undefined;