Navigate to the login page in Angular 2

Question

Navigate to the login page in Angular 2

Initially, the template login (login.component) needs to be called first. Once the login is complete, then app.component will be loaded.

Is it possible to achieve this? And if so, how can I do it?

Edited Question:

I am already using CanActivate. Apologies for my English as I am still learning. My objective is to...

have the bootstrap initiate app.component first.

@Component({
    selector: 'my-app',
    template: `  
    <ul class="sidebar-menu">
        <li class="header">Painel</li>
        <li class="treeview">
          <a href="#"><i class="fa fa-link"></i> <span>Loja</span>
            <span class="pull-right-container">
              <i class="fa fa-angle-left pull-right"></i>
            </span>
          </a>
          <ul class="treeview-menu">
            <li><a routerLink="/dashboard">Dashboard</a></li>
          </ul>
        </li>
        <li><a routerLink="/users"><i class="fa fa-book"></i> <span>User</span></a></li>
    </ul>
    <div class="content-wrapper">
        <router-outlet></router-outlet>
    </div>`,
})

export class AppComponent implements OnInit{}

To ensure that login.component is called before app.component, you need to implement a mechanism where the user must log in first before accessing any content from app.component.

The menu will only be displayed if login.component is part of a route, as the menu content will be rendered within

<router-outlet></router-outlet>

.

angular typescript angular2-routing

Answer 1

Answer №1

A solution is available and can be found in the comprehensive guide on advanced Routing & Navigation, specifically outlined in the Milestone #4: Route Guards section.

To implement this solution, you must create a CanActivate guard and apply it to secure the route:

auth-guard.service.ts

import { Injectable } from '@angular/core';
import { CanActivate } from '@angular/router';

@Injectable()
export class AuthGuard implements CanActivate {
  canActivate() {
    console.log('AuthGuard#canActivate called');
    return true;
  }
}

Utilize the guard to protect the authenticated portion of your website:

admin.routing.ts

import { AuthGuard } from '../auth-guard.service';

const adminRoutes: Routes = [
  {
    path: 'admin',
    component: AdminComponent,
    canActivate: [AuthGuard],
    children: [
      {
        path: '',
        children: [
          { path: 'crises', component: ManageCrisesComponent },
          { path: 'heroes', component: ManageHeroesComponent },
          { path: '', component: AdminDashboardComponent }
        ],
      }
    ]
  }
];

export const adminRouting: ModuleWithProviders =
RouterModule.forChild(adminRoutes);

Answer 2

A solution is available and can be found in the comprehensive guide on advanced Routing & Navigation, specifically outlined in the Milestone #4: Route Guards section.

To implement this solution, you must create a CanActivate guard and apply it to secure the route:

auth-guard.service.ts

import { Injectable } from '@angular/core';
import { CanActivate } from '@angular/router';

@Injectable()
export class AuthGuard implements CanActivate {
  canActivate() {
    console.log('AuthGuard#canActivate called');
    return true;
  }
}

Utilize the guard to protect the authenticated portion of your website:

admin.routing.ts

import { AuthGuard } from '../auth-guard.service';

const adminRoutes: Routes = [
  {
    path: 'admin',
    component: AdminComponent,
    canActivate: [AuthGuard],
    children: [
      {
        path: '',
        children: [
          { path: 'crises', component: ManageCrisesComponent },
          { path: 'heroes', component: ManageHeroesComponent },
          { path: '', component: AdminDashboardComponent }
        ],
      }
    ]
  }
];

export const adminRouting: ModuleWithProviders =
RouterModule.forChild(adminRoutes);

Answer 3

Answer №2

By utilizing the CanActivate feature, users can be granted access to a page only if they have been activated within the route, otherwise they will be redirected to the login page.

import { ModuleWithProviders } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { CanActivateAuthGuard } from './auth.service'

import { MyComponent } from './app.component';

const routes: Routes = [
    { path: '/home', component: MyComponent , canActivate: [CanActivateAuthGuard]}]

/============/

import { CanActivate, Router } from '@angular/router';

@Injectable()
export class CanActivateAuthGuard implements CanActivate {

  constructor(private router: Router) {}
    if (this.authService.isLoggedIn()) {
        return true;
    }
    //Redirect the user before denying them access to this route
    this.router.navigate(['/login']);
    return false;
}

Answer 4

By utilizing the CanActivate feature, users can be granted access to a page only if they have been activated within the route, otherwise they will be redirected to the login page.

import { ModuleWithProviders } from '@angular/core';
import { Routes, RouterModule } from '@angular/router';
import { CanActivateAuthGuard } from './auth.service'

import { MyComponent } from './app.component';

const routes: Routes = [
    { path: '/home', component: MyComponent , canActivate: [CanActivateAuthGuard]}]

/============/

import { CanActivate, Router } from '@angular/router';

@Injectable()
export class CanActivateAuthGuard implements CanActivate {

  constructor(private router: Router) {}
    if (this.authService.isLoggedIn()) {
        return true;
    }
    //Redirect the user before denying them access to this route
    this.router.navigate(['/login']);
    return false;
}

Navigate to the login page in Angular 2

Answer №1

Answer №2

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