Implement user requests autorizations in the client side

client/angular/users/services/auth.service.ts

@@ -1,20 +1,23 @@
 import { Injectable } from 'angular2/core';
-import { Http, Response, Headers, URLSearchParams } from 'angular2/http';
+import { Http, Response, Headers, URLSearchParams, RequestOptions } from 'angular2/http';
 import { Observable, Subject } from 'rxjs/Rx';
 
 import { AuthStatus } from '../models/authStatus';
+import { User } from '../models/user';
 
 @Injectable()
 export class AuthService {
-  loginChanged$ = this._loginChanged.asObservable();
-
-  private _loginChanged = new Subject<AuthStatus>();
+  loginChanged$;
 
+  private _loginChanged;
   private _baseLoginUrl = '/api/v1/users/token';
   private _clientId = '56f055587305d40b21904240';
   private _clientSecret = 'megustalabanana';
 
-  constructor (private http: Http) {}
+  constructor (private http: Http) {
+    this._loginChanged = new Subject<AuthStatus>();
+    this.loginChanged$ = this._loginChanged.asObservable();
+  }
 
   login(username: string, password: string) {
     let body = new URLSearchParams();
@@ -42,12 +45,46 @@ export class AuthService {
     // TODO make HTTP request
   }
 
+  getRequestHeader(): Headers {
+    return new Headers({ 'Authorization': `${this.getTokenType()} ${this.getToken()}` });
+  }
+
+  getAuthRequestOptions(): RequestOptions {
+    return new RequestOptions({ headers: this.getRequestHeader() });
+  }
+
+  getToken(): string {
+    return localStorage.getItem('access_token');
+  }
+
+  getTokenType(): string {
+    return localStorage.getItem('token_type');
+  }
+
+  getUser(): User {
+    if (this.isLoggedIn() === false) {
+      return null;
+    }
+
+    const user = User.load();
+
+    return user;
+  }
+
+  isLoggedIn(): boolean {
+    if (this.getToken()) {
+      return true;
+    } else {
+      return false;
+    }
+  }
+
   setStatus(status: AuthStatus) {
     this._loginChanged.next(status);
   }
 
   private handleError (error: Response) {
     console.error(error);
-    return Observable.throw(error.json().error || 'Server error');
+    return Observable.throw(error.json() || { error: 'Server error' });
   }
 }