adada

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Injectable()
export class AuthenticationService {
    public userRole: String = "default"; // Assume default user login
    public state: Number = 0;
    private httpClient: HttpClient;
    private url: string = "http://localhost:3000/v2/login";

    constructor (httpClient: HttpClient) {
        this.httpClient = httpClient;
    }

    login (user:string, pass:string):boolean {
        this.httpClient.post(this.url, {
            username: user,
            password: pass
          }, {observe: 'response'}).subscribe(
            data => {
              if (data.status == 200) {
                // Since the response is of object type HttpResponse<object> so that
                // I can read the status code from it, it needs to be casted this very
                // odd way in order to extract the json data from it.
                // If it's stupid but it works, it's not stupid I guess.
                this.userRole = JSON.parse(JSON.stringify(data.body)).role;

                localStorage.setItem('username', user);
                this.state = 1;
                return true;
              }
            },
            error => {
                console.log("ERROR OBJECT: " + error);
                return false;
            }
          );
        return false;
    }

    logout ():any {
        localStorage.removeItem('username');
    }

    getUser ():any {
        return localStorage.getItem('username');
    }

    isRole (role:string):boolean {
        if (this.userRole == role) {
            return true;
        } else {
            return false;
        }
    }

    isLoggedIn ():boolean {
        return this.getUser() != null;
    }
}