opt-cc/static/src/app/login/login.component.ts

import {Component, OnInit} from "@angular/core";
import {Router} from "@angular/router";
import {LoginService} from "../services/app-user-service/login-service";
import {RouteConfig} from "../app.config";


@Component({
  moduleId: module.id,
  templateUrl: 'login.component.html',
  styleUrls: ['login.component.css']
})

export class LoginComponent implements OnInit {

  showErrorLabel = false;

  error: string;

  loading = false;

  returnUrl: string;

  constructor(private router: Router,
              private loginService: LoginService) {
  }

  ngOnInit() {
    // reset login status
    this.loginService.logout();
    // redirect on success
    this.returnUrl = RouteConfig.overviewPath;
  }

  login(username: string, password: string) {
    if (username.length > 0 && password.length > 0) {
      this.loading = true;
      this.loginService.login(username, password)
          .subscribe(
            data => {
              this.router.navigate([this.returnUrl]);
            },
            error => {
              this.error = error._body;
              this.showErrorLabel = true;
              setTimeout(() => {
                this.showErrorLabel = false;
              }, 4000);
              this.loading = false;
            });
    }
  }
}