login.component.ts

import {Component, OnDestroy, OnInit} from '@angular/core';
import {FormControl, FormGroup, Validators} from '@angular/forms';
import {MainDataService} from '../../maindata.service';
import {CustomtextService} from 'iqb-components';
import {ActivatedRoute, Router} from '@angular/router';
import {Subscription} from 'rxjs';
import {AuthData} from '../../app.interfaces';
import {BackendService} from '../../backend.service';

@Component({
  templateUrl: './login.component.html',
  styles: [
    'mat-card {margin: 10px;}',
    '.mat-card-gray {background-color: lightgray}'
  ]
})

export class LoginComponent  implements OnInit, OnDestroy {
  static oldLoginName = '';
  private routingSubscription: Subscription = null;
  returnTo = '';
  problemText = '';

  loginForm = new FormGroup({
    name: new FormControl(LoginComponent.oldLoginName, [Validators.required, Validators.minLength(3)]),
    pw: new FormControl('')
  });

  constructor(
    public mds: MainDataService,
    public cts: CustomtextService,
    private bs: BackendService,
    private router: Router,
    private route: ActivatedRoute
  ) { }

  ngOnInit(): void {
    this.mds.setSpinnerOff();
    this.routingSubscription = this.route.params.subscribe(params => {
      this.returnTo = params['returnTo'];
    });
  }

  login() {
    const loginData = this.loginForm.value;
    LoginComponent.oldLoginName = loginData['name'];
    this.mds.setSpinnerOn();
    this.bs.login(loginData['name'], loginData['pw']).subscribe(
      authData => {
        this.mds.setSpinnerOff();
        this.problemText = '';
        if (typeof authData === 'number') {
          const errCode = authData as number;
          if (errCode === 400) {
            this.problemText = 'Anmeldedaten sind nicht gültig. Bitte nocheinmal versuchen!';
          } else if (errCode === 202 || errCode === 204) {
            this.problemText = 'Anmeldedaten sind gültig, aber es sind keine Arbeitsbereiche oder Tests freigegeben.';

          } else {
            this.problemText = 'Problem bei der Anmeldung.';
            // app.interceptor will show error message
          }
        } else {
          const authDataTyped = authData as AuthData;
          this.mds.setAuthData(authDataTyped);

          if (this.returnTo) {
            this.router.navigateByUrl(this.returnTo).then(navOk => {
              if (!navOk) {
                this.router.navigate(['/r']);
              }
            });
          } else {
            this.router.navigate(['/r']);
          }
        }
      }
    );
  }

  ngOnDestroy() {
    if (this.routingSubscription !== null) {
      this.routingSubscription.unsubscribe();
    }
  }
}