import { Component, OnInit } from '@angular/core';
import { FormGroup, FormControl, FormBuilder, Validators } from '@angular/forms';


@Component({
  moduleId: module.id,
  selector: 'my-app',
  templateUrl: 'app.component.html',
})
export class AppComponent implements OnInit {
    

    constructor() { }

    ngOnInit() {
        

    }

   
}
import { NgModule }      from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
import { RouterModule } from "@angular/router";
import { appRouting } from "./app.routing";

import { AppComponent }   from './app.component';
import { AnonymousComponent }   from './anonymous.component';
import { UserComponent }   from './user.component';

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

@NgModule({
  imports:      [ BrowserModule, ReactiveFormsModule, RouterModule.forRoot(appRouting) ],
  declarations: [ AppComponent, AnonymousComponent, UserComponent ],
  providers: [ AuthGuard, AuthService ],
  bootstrap:    [ AppComponent ]
})

export class AppModule { }
import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';

import { AppModule } from './app.module';

const platform = platformBrowserDynamic();
platform.bootstrapModule(AppModule);

<!DOCTYPE html>
<html>
  <head>
    
    <title>Handle different form controls</title>
    <!--optional bootstrap for faster styling-->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css" integrity="sha384-1q8mTJOASx8j1Au+a5WDVnPi2lkFfwwEAa8hDDdjZlpLegxhjVME1fgjWPGmkzs7" crossorigin="anonymous">

    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">

    <!-- 1. Load libraries -->
     <!-- Polyfill(s) for older browsers -->
    <script src="https://unpkg.com/core-js/client/shim.min.js"></script>

    <script src="https://unpkg.com/zone.js@0.6.23?main=browser"></script>
    <script src="https://unpkg.com/reflect-metadata@0.1.3"></script>
    <script src="https://unpkg.com/systemjs@0.19.27/dist/system.src.js"></script>

    <!-- 2. Configure SystemJS -->
    <script src="systemjs.config.js"></script>
    <script>
      System.import('app').catch(function(err){ console.error(err); });
    </script>
    <script>document.write('<base href="' + document.location + '" />');</script>
  </head>

  <!-- 3. Display the application -->
  <body>
    <my-app>Loading...</my-app>
  </body>
</html>

/**
 * PLUNKER VERSION
 * (based on systemjs.config.js in angular.io)
 * System configuration for Angular 2 samples
 * Adjust as necessary for your application needs.
 */
(function (global) {
  
  var routerVer = '@3.0.2'; // lock router version
  
  System.config({
    // DEMO ONLY! REAL CODE SHOULD NOT TRANSPILE IN THE BROWSER
    transpiler: 'ts',
    typescriptOptions: {
      tsconfig: true
    },
    meta: {
      'typescript': {
        "exports": "ts"
      }
    },
    paths: {
      // paths serve as alias
      'npm:': 'https://unpkg.com/'
    },
    // map tells the System loader where to look for things
    map: {
      // our app is within the app folder
      app: 'app',

      // angular bundles
      '@angular/core': 'npm:@angular/core/bundles/core.umd.js',
      '@angular/common': 'npm:@angular/common/bundles/common.umd.js',
      '@angular/compiler': 'npm:@angular/compiler/bundles/compiler.umd.js',
      '@angular/platform-browser': 'npm:@angular/platform-browser/bundles/platform-browser.umd.js',
      '@angular/platform-browser-dynamic': 'npm:@angular/platform-browser-dynamic/bundles/platform-browser-dynamic.umd.js',
      '@angular/http': 'npm:@angular/http/bundles/http.umd.js',
      '@angular/router':            'https://npmcdn.com/@angular/router' + routerVer,
      '@angular/forms': 'npm:@angular/forms/bundles/forms.umd.js',
      '@angular/upgrade': 'npm:@angular/upgrade/bundles/upgrade.umd.js',

      // other libraries
      'rxjs':                       'npm:rxjs',
      'angular2-in-memory-web-api': 'npm:angular2-in-memory-web-api',
      'ts':                         'npm:plugin-typescript@4.0.10/lib/plugin.js',
      'typescript':                 'npm:typescript@2.0.2/lib/typescript.js',

    },
    // packages tells the System loader how to load when no filename and/or no extension
    packages: {
      app: {
        main: './main.ts',
        defaultExtension: 'ts'
      },
      rxjs: {
        defaultExtension: 'js'
      },
      'angular2-in-memory-web-api': {
        main: './index.js',
        defaultExtension: 'js'
      }
    }
  });
})(this);

{
  "compilerOptions": {
    "target": "es5",
    "module": "commonjs",
    "moduleResolution": "node",
    "sourceMap": true,
    "emitDecoratorMetadata": true,
    "experimentalDecorators": true,
    "removeComments": false,
    "noImplicitAny": true,
    "suppressImplicitAnyIndexErrors": true
  }
}
export interface User {
  name: string;
  address?: {
    street?: string;
    postcode?: string;
  }
}
<div class="container">
    <h1 class="title">Component Router</h1>
    <a [routerLink]="['/anonymous']">Anonymous View</a><br>
    <a [routerLink]="['/user']">User View</a>
    
  <router-outlet></router-outlet>
</div>
import { Component, OnInit } from '@angular/core';
import { Router } from '@angular/router';

@Component({
  moduleId: module.id,
  selector: 'my-anon',
  template: `
  <h2>Anonymous View displayed</h2>
  <button (click)="login()">login</button>
  `
})
export class AnonymousComponent implements OnInit {
    

    constructor(private router: Router) { }

    ngOnInit() {
        

    }
    
    login(){
      
      // in real world app- call auth service to get the token
      
      localStorage.setItem('access_token', "jwt_token");
      
      this.router.navigate(['/user']);
      
      //console.log(localStorage.getItem('access_token'));
    }

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

@Component({
  moduleId: module.id,
  selector: 'my-user',
  template: `
  <h2>User View displayed</h2>
  <button (click)="logout()">logout</button>
  `
})
export class UserComponent implements OnInit {
    

    constructor(private router: Router) { }

    ngOnInit() {
        

    }


    logout(){
      
      // in real world app- call auth service to logout
      
      console.log("asdf");
      
      localStorage.removeItem('access_token');
      
      this.router.navigate(['/anonymous']);
    }
   
}
import { Routes } from '@angular/router';


import { AuthGuard } from './auth.guard';
import { AnonymousComponent }   from './anonymous.component';
import { UserComponent }   from './user.component';

export const appRouting : Routes = [

	// catch-all route
	{
		path: '',
		redirectTo: 'user',
		pathMatch: 'full'
	},
	{
		path: 'user',
		canActivate: [AuthGuard],
		component: UserComponent
	
	},
	{
		path: 'anonymous',
		component: AnonymousComponent
	}

];

import { Injectable } from '@angular/core';
import { Router, CanActivate } from '@angular/router';
import { AuthService } from './auth.service';


@Injectable()
export class AuthGuard implements CanActivate {

    base_url: string;

    constructor(private router: Router
        , private authService: AuthService) {}

    canActivate() {
        // Check to see if a user has a valid token
        if (this.authService.isAuthenticated()) {
            // If they do, return true and allow the user to load app
            return true;
        }

        // If not, they redirect them to the login page
        this.router.navigate(['/anonymous']);
        return false;
    }


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



@Injectable()
export class AuthService {


    constructor() {
       
    }

    authenticateUser(username: string, password: string): Observable<any[]> {

       // call API to authenticate user
       
       // set the token in localstorage
       localStorage.setItem('access_token', "jwt_token");

    }
    
    logout(){
      
      // call API to logout user
      
      // remove the localstorage token
      localStorage.removeItem('access_token');
    }



    isAuthenticated() {
        // get the auth token from localStorage
        let token = localStorage.getItem('access_token');

        // check if token is set, then...
        if (token) {
            return true;
        }

        return false;
    }


}