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

@Component({
    selector: 'app-root',
    template: `
`
})

export class AppComponent {}

import {Component} from '@angular/core';
import {AppService} from './app.service'

@Component({
    selector: 'home-header',
    providers: [AppService],
  template: `

    Login
    

        Welcome !!
        Logout
        

        
    
`
})

export class HomeComponent {
     public isLoggedIn = false;

    constructor(
        private _service:AppService){}

    ngOnInit(){
        this.isLoggedIn = this._service.checkCredentials();
        let i = window.location.href.indexOf('code');
        if(!this.isLoggedIn && i != -1){
            this._service.retrieveToken(window.location.href.substring(i + 5));
        }
    }

    login() {
        window.location.href = 'http://localhost:8081/spring-security-oauth-server/oauth/authorize?response_type=code&client_id=' + this._service.clientId + '&redirect_uri='+ this._service.redirectUri;
    }

    logout() {
        this._service.logout();
    }
}

import { Component } from '@angular/core';
import {AppService, Foo} from './app.service'

@Component({
  selector: 'foo-details',
  providers: [AppService],
  template: `

    
Foo Details
    

        ID {{foo.id}}
    
    

        Name {{foo.name}}
    
    

        New Foo
    
`
})

export class FooComponent {
    public foo = new Foo(1,'sample foo');
    private foosUrl = 'http://localhost:8082/spring-security-oauth-resource/foos/';

    constructor(private _service:AppService) {}

    getFoo(){
        this._service.getResource(this.foosUrl+this.foo.id)
         .subscribe(
            data => this.foo = data,
            error =>  this.foo.name = 'Error');
    }
}

import {Injectable} from '@angular/core';
import { Cookie } from 'ng2-cookies';
import { HttpClient, HttpHeaders } from '@angular/common/http';
import { Observable } from 'rxjs/Observable';
import 'rxjs/add/operator/catch';
import 'rxjs/add/operator/map';

export class Foo {
  constructor(
    public id: number,
    public name: string) { }
}

@Injectable()
export class AppService {
   public clientId = 'fooClientId';
   public redirectUri = 'http://localhost:8089/';

  constructor(
    private _http: HttpClient){}

  retrieveToken(code){
    let params = new URLSearchParams();
    params.append('grant_type','authorization_code');
    params.append('client_id', this.clientId);
    params.append('redirect_uri', this.redirectUri);
    params.append('code',code);

    let headers = new HttpHeaders({'Content-type': 'application/x-www-form-urlencoded; charset=utf-8', 'Authorization': 'Basic '+btoa(this.clientId+":secret")});
     this._http.post('http://localhost:8081/spring-security-oauth-server/oauth/token', params.toString(), { headers: headers })
    .subscribe(
      data => this.saveToken(data),
      err => alert('Invalid Credentials')
    );
  }

  saveToken(token){
    var expireDate = new Date().getTime() + (1000 * token.expires_in);
    Cookie.set("access_token", token.access_token, expireDate);
    console.log('Obtained Access token');
    window.location.href = 'http://localhost:8089';
  }

  getResource(resourceUrl) : Observable{
    var headers = new HttpHeaders({'Content-type': 'application/x-www-form-urlencoded; charset=utf-8', 'Authorization': 'Bearer '+Cookie.get('access_token')});
    return this._http.get(resourceUrl,{ headers: headers })
                   .catch((error:any) => Observable.throw(error.json().error || 'Server error'));
  }

  checkCredentials(){
    return Cookie.check('access_token');
  }

  logout() {
    Cookie.delete('access_token');
    window.location.reload();
  }
}