export class LoginComponent {
  credentials: LoginRequest;
  error = '';
  formGroup: FormGroup;
  constructor(private auth: AuthService, private router: Router) {

  }
  ngOnInit() {
    this.formGroup = new FormGroup({
      username: new FormControl("", Validators.required),
      password: new FormControl("", Validators.required)
    });
    this.credentials = new LoginRequest();
  this.auth.logout();
  }
  login(): Observable<boolean> {
        if (this.formGroup.invalid) {
          this.markControls(this.formGroup, control => control.markAsDirty());
          console.warn("Cannot login, formGroup is invalid!");
          return;
        }

        const loggedUser: LoggedUser = {
          username: this.formGroup.value.username
        };
        try
        {
          this.auth.login(this.formGroup.value)
            .subscribe(
              result => {
                if (result === true) {
                     this.router.navigate(['/']);
                     console.log("Login success!");
                }
               });
        }
        catch (ex)
        {
          this.error = 'Nieprawidłowy login lub hasło!';
        }
      }
      private markControls(form: FormGroup, callback: (control: AbstractControl) => void): void {
    Object.keys(form.controls)
      .forEach(key => {
        callback(form.get(key));
      })
  }

}