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import { Injectable } from '@angular/core';
import { Headers, Http, Response, URLSearchParams } from '@angular/http';
import { Observable } from 'rxjs/Observable';
import { Subject } from 'rxjs/Subject';
import { AuthStatus } from './auth-status.model';
import { User } from './user.model';
@Injectable()
export class AuthService {
private static BASE_CLIENT_URL = '/api/v1/clients/local';
private static BASE_TOKEN_URL = '/api/v1/users/token';
private static BASE_USER_INFORMATIONS_URL = '/api/v1/users/me';
loginChangedSource: Observable<AuthStatus>;
private clientId: string;
private clientSecret: string;
private loginChanged: Subject<AuthStatus>;
private user: User = null;
constructor(private http: Http) {
this.loginChanged = new Subject<AuthStatus>();
this.loginChangedSource = this.loginChanged.asObservable();
// Fetch the client_id/client_secret
// FIXME: save in local storage?
this.http.get(AuthService.BASE_CLIENT_URL)
.map(res => res.json())
.catch(this.handleError)
.subscribe(
result => {
this.clientId = result.client_id;
this.clientSecret = result.client_secret;
console.log('Client credentials loaded.');
},
error => {
alert(error);
}
);
// Return null if there is nothing to load
this.user = User.load();
}
getRefreshToken() {
if (this.user === null) return null;
return this.user.getRefreshToken();
}
getRequestHeaderValue() {
return `${this.getTokenType()} ${this.getAccessToken()}`;
}
getAccessToken() {
if (this.user === null) return null;
return this.user.getAccessToken();
}
getTokenType() {
if (this.user === null) return null;
return this.user.getTokenType();
}
getUser(): User {
return this.user;
}
isLoggedIn() {
if (this.getAccessToken()) {
return true;
} else {
return false;
}
}
login(username: string, password: string) {
let body = new URLSearchParams();
body.set('client_id', this.clientId);
body.set('client_secret', this.clientSecret);
body.set('response_type', 'code');
body.set('grant_type', 'password');
body.set('scope', 'upload');
body.set('username', username);
body.set('password', password);
let headers = new Headers();
headers.append('Content-Type', 'application/x-www-form-urlencoded');
let options = {
headers: headers
};
return this.http.post(AuthService.BASE_TOKEN_URL, body.toString(), options)
.map(res => res.json())
.map(res => {
res.username = username;
return res;
})
.flatMap(res => this.fetchUserInformations(res))
.map(res => this.handleLogin(res))
.catch(this.handleError);
}
logout() {
// TODO: make an HTTP request to revoke the tokens
this.user = null;
User.flush();
this.setStatus(AuthStatus.LoggedOut);
}
refreshAccessToken() {
console.log('Refreshing token...');
const refreshToken = this.getRefreshToken();
let body = new URLSearchParams();
body.set('refresh_token', refreshToken);
body.set('client_id', this.clientId);
body.set('client_secret', this.clientSecret);
body.set('response_type', 'code');
body.set('grant_type', 'refresh_token');
let headers = new Headers();
headers.append('Content-Type', 'application/x-www-form-urlencoded');
let options = {
headers: headers
};
return this.http.post(AuthService.BASE_TOKEN_URL, body.toString(), options)
.map(res => res.json())
.map(res => this.handleRefreshToken(res))
.catch(this.handleError);
}
private fetchUserInformations (obj: any) {
// Do not call authHttp here to avoid circular dependencies headaches
const headers = new Headers();
headers.set('Authorization', `Bearer ${obj.access_token}`);
return this.http.get(AuthService.BASE_USER_INFORMATIONS_URL, { headers })
.map(res => res.json())
.map(res => {
obj.id = res.id;
obj.role = res.role;
return obj;
}
);
}
private handleError (error: Response) {
console.error(error);
return Observable.throw(error.json() || { error: 'Server error' });
}
private handleLogin (obj: any) {
const id = obj.id;
const username = obj.username;
const role = obj.role;
const hash_tokens = {
access_token: obj.access_token,
token_type: obj.token_type,
refresh_token: obj.refresh_token
};
this.user = new User(id, username, role, hash_tokens);
this.user.save();
this.setStatus(AuthStatus.LoggedIn);
}
private handleRefreshToken (obj: any) {
this.user.refreshTokens(obj.access_token, obj.refresh_token);
this.user.save();
}
private setStatus(status: AuthStatus) {
this.loginChanged.next(status);
}
}
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