Using Angular2, how to redirect to previous url before login redirect

Question

Using Angular2 to create a single page app, I\'m intercepting unauthenticated user access to non-public routes in a custom RouterOutlet and redirecting them to

Answer 1

Updated Example Using Angular 2.2.1

Auth Guard that passes original URL to login component:

import { Injectable } from '@angular/core';
import { Router, CanActivate, ActivatedRouteSnapshot, RouterStateSnapshot } from '@angular/router';

@Injectable()
export class AuthGuard implements CanActivate {

    constructor(private router: Router) { }

    canActivate(route: ActivatedRouteSnapshot, state: RouterStateSnapshot) {
        if (localStorage.getItem('currentUser')) {
            // logged in so return true
            return true;
        }

        // not logged in so redirect to login page with the return url
        this.router.navigate(['/login', { returnUrl: state.url }]);
        return false;
    }
}

import { Component, OnInit } from '@angular/core';
import { Router, ActivatedRoute } from '@angular/router';

import { AlertService, AuthenticationService } from '../_services/index';

@Component({
    moduleId: module.id,
    templateUrl: 'login.component.html'
})

Login Component that redirects to the previous / original URL after login:

export class LoginComponent implements OnInit {
    model: any = {};
    loading = false;
    returnUrl: string;

    constructor(
        private route: ActivatedRoute,
        private router: Router,
        private authenticationService: AuthenticationService,
        private alertService: AlertService) { }

    ngOnInit() {
        // reset login status
        this.authenticationService.logout();

        // get return url from route parameters or default to '/'
        this.returnUrl = this.route.snapshot.params['returnUrl'] || '/';
    }

    login() {
        this.loading = true;
        this.authenticationService.login(this.model.username, this.model.password)
            .subscribe(
                data => {
                    // login successful so redirect to return url
                    this.router.navigate([this.returnUrl]);
                },
                error => {
                    // login failed so display error
                    this.alertService.error(error);
                    this.loading = false;
                });
    }
}

For more details and working demo you can check out this post