import { Injectable } from '@angular/core'; import { HttpClient, HttpResponse, HttpErrorResponse, HttpHeaders } from '@angular/common/http'; import { Observable, of, throwError } from 'rxjs'; import { catchError, tap } from 'rxjs/operators'; import { User } from 'app/core/models/user'; const httpOptions = { withCredentials: true, headers: new HttpHeaders({ 'Content-Type': 'application/json' }) }; @Injectable({ providedIn: 'root' }) export class AuthService { isLoggedIn: boolean; // store the URL so we can redirect after logging in redirectUrl: string; constructor(private http: HttpClient) { //check for the cookie in local storrage //TODO checks for username now since django does not seem to return a cookie if (localStorage.getItem('username')) { this.isLoggedIn = true; } else { this.isLoggedIn = false; } } // Initialize the service by querying the server // Not sure if this makes sense, since a service is not supposed to init() init(): Observable { return this.http.get('/users/whoami/', httpOptions).pipe( tap(val => { console.log('auth-init-whami : ', val); }), catchError(this.handleError()) ); } //loggins a users. expects a user model login(user: User): Observable { return this.http.post('/users/login/', user, httpOptions).pipe( tap(val => { this.isLoggedIn = true; //Set the session cookie in local storrage. //TODO needs validation }), catchError(this.handleError()) ); } //logout the user //TODO not yet used logout(): Observable { this.isLoggedIn = false; localStorage.removeItem('username'); return this.http.post('/users/logout/', {}, httpOptions); } //very generic error handling function. //implicitly returns an observable that will display an error message private handleError() { return (error: any): Observable => { console.error(error); return of(error); }; } }