I am developing an website that needs to be logged in with Facebook account. I am using Angular 2 and, of course, TypeScript. It works But not exactly what I wanted. I can't take back the user's information.
Let's go to the code:
import {Component} from 'angular2/core';
import {Main} from './pages/main/main';
declare const FB: any;
@Component({
selector: 'my-app',
templateUrl: 'app/app.html',
directives: [Main]
})
export class AppComponent implements OnInit {
token: any;
loged: boolean = false;
user = { name: 'Hello' };
constructor() { }
statusChangeCallback(response: any) {
if (response.status === 'connected') {
console.log('connected');
} else {
this.login();
}
}
login() {
FB.login(function(result) {
this.loged = true;
this.token = result;
}, { scope: 'user_friends' });
}
me() {
FB.api('/me?fields=id,name,first_name,gender,picture.width(150).height(150),age_range,friends',
function(result) {
if (result && !result.error) {
this.user = result;
console.log(this.user);
} else {
console.log(result.error);
}
});
}
ngOnInit() {
FB.getLoginStatus(response => {
this.statusChangeCallback(response);
});
}
}
Basically, When the page loads I check if the user is logged in to Facebook, if not, I call the login method. The me method is used to fetch the users information, like its name, first name etc. When I logged in condition browser console print the following line:
Object {id: "666", name: "Paulo Henrique Tokarski Glinski", first_name: "Paulo", gender: "male", picture: Object…}
Everything ok! But I want to get that Object and put into a User object! Something like that:
me method:
this.user = result;
console.log(this.user);
But the user just exists inside the method. If I print it outside, its returns nothing.
I just want to print the users name etc. at the website page. I did almost the same thing with Angular JS and worked well.
Please! Help me!
Angular 2 Service level implementation
import {Injectable} from '@angular/core';
import { Location } from '@angular/common';
import { Http, Response, Headers, RequestOptions,URLSearchParams } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import { ConfigService } from "app/core/services/config.service";
import 'rxjs/add/observable/throw';
import 'rxjs/add/operator/map';
import 'rxjs/add/operator/catch';
@Injectable()
export class AuthService {
constructor(private http: Http,
private configProvider:ConfigService) {
}
authenticateFacebook(){
window.location.href = 'https://www.facebook.com/v2.9/dialog/oauth?client_id='+
this.configProvider.config.facebook.clientId +
'&redirect_uri='+ this.configProvider.config.facebook.redirectURI + '&scope=public_profile';
}
getAccessToken(authenticationCode: string){
var authProviderUrl = 'https://graph.facebook.com/v2.9/oauth/access_token';
var authParameters = {
client_id: this.configProvider.config.facebook.clientId,
redirect_uri: this.configProvider.config.facebook.redirectURI,
client_secret: this.configProvider.config.facebook.clientSecret,
code: authenticationCode
};
var params = [];
for (var k in authParameters) {
params.push(k + '=' + authParameters[k]);
}
var authOpenURI = authProviderUrl + '?' + params.join('&');
return this.http.get(authOpenURI)
.map(res => res.json())
.catch(err => Observable.throw(err));
}
getUserFacebookProfile(accessToken:string):Observable<any>{
var fields = ['id', 'email', 'first_name', 'last_name', 'link', 'name','picture.type(small)'];
var graphApiUrl = 'https://graph.facebook.com/v2.5/me?fields=' + fields.join(',');
return this.http.get(graphApiUrl+'&access_token='+accessToken+'')
.map(res => res.json())
.catch(err => Observable.throw(err));
}
Caller level function, this code will be in the component of your redirect URI
//Facebook authentication check
if (window.location.href.indexOf("code") > -1){
var code = window.location.href.substring(window.location.href.indexOf("?") + 1).split('&')[0].split('=')[1];
this.getFaceBookProfile(code);
}
//Get profile from facebook
getFaceBookProfile(code:string){
this.authService.getAccessToken(code).subscribe(oathAccessData => {
this.authService.getUserFacebookProfile(oathAccessData.access_token).subscribe(profile => {
this.userProfile = new UserProfile(profile.name,profile.email, profile.picture.data.url,"facebook",
profile.id);},err => { console.log(err); });},err => { console.log(err);});
this.router.navigate(['/dashboard']);
}
you can use fat arrow functions to use the same context ...
login() {
FB.login((result: any) => {
this.loged = true;
this.token = result;
}, { scope: 'user_friends' });
}
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