import { CanActivateChild, Router, ActivatedRouteSnapshot, RouterStateSnapshot, UrlTree, CanActivate } from '@angular/router';
import { Observable } from 'rxjs';
import { AbstractPageGuardService } from './abstract-page-guard.service';
/**
 * Use this service to implement Load Page Route Guards in your application. This is for a
 * typical form flow, where the user must proceed sequentially from one page to
 * the next.
 *
 * To setup, you must:
 *
 * 1. Create a service implementing the abstract methods in `AbstractPageGuardService`
 * 2. Setup AbstractPageGuardService in NgModule providers, to `useExisting` the service from previous step.
 * 3. Add this LoadPageGuardService to same providers from previous step.
 * 4. Configure routes to use LoadPageGuardService - `canActivate` or `canActivateChild`
 * 5. Have each "page" in the form call `setPageIncomplete()` or `setPageComplete()` (from the "PageStateService")
 *
 *
 * You must make sure to setup AbstractPageGuardService in NgModules correctly.
 *
 *  @example
 *                //STEP 2 + STEP 3
 *                //registration.module.ts
 *                providers: [
 *                        ...
 *                        { provide: AbstractPageGuardService, useExisting: DefaultPageGuardService },
 *                        LoadPageGuardService
 *                ]
 *
 *
 *                //STEP 4
 *                //registration-routing.modle.ts
 *                const routes: Routes = [{
 *                   path: '',
 *                   canActivateChild: [LoadPageGuardService] //or canActivate
 *                  }
 *                   ...
 *                ]
 *
 *
 *                //STEP 5
 *                //example.component.ts
 *                ngOnInit() { this.pageService.setPageIncomplete(); }
 *                continue() { this.pageService.setPageComplete(); }
 *
 *
 */
export declare class LoadPageGuardService implements CanActivate, CanActivateChild {
    private router;
    private service;
    constructor(router: Router, service: AbstractPageGuardService);
    canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean | UrlTree> | Promise<boolean | UrlTree> | boolean | UrlTree;
    canActivateChild(next: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> | Promise<boolean> | boolean;
    /** Logic to determine whether or not allow to continue to next page */
    private _continue;
}