So let me give a brief explanation of the mini-application I've designed using Angular : A simple login page that requires user email and password as credentials. Once logged in, the user is moved to a page where a list of tasks is displayed in the form of individual boxes .

This code review is not focused on CSS, but on functionality so please can you focus on providing feedback on the following:

1. authenticate() method (return value and code logic)
2. login() method (code logic and debugging)
3. task service (Correctness of object used and correctness of logic and best practices)

login component.html:

<form [formGroup]="loginForm" (ngSubmit)="login()">
   <label>Email:</label>
   <input type="email" formControlName="email">
   <label>Password:</label>
   <input type="text" formControlName="password">
   <button>Login</button>
</form>
<link href="https://cdn.jsdelivr.net/npm/[email protected]/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">
<script src="https://cdn.jsdelivr.net/npm/[email protected]/dist/js/bootstrap.bundle.min.js" integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz" crossorigin="anonymous"></script>

authentication.service:

    // src/app/auth.service.ts

import { Injectable } from '@angular/core';
import { HttpClient, HttpHeaders, HttpRequest, HttpResponse } from '@angular/common/http';
import { Observable } from 'rxjs';


@Injectable({
  providedIn: 'root'
})
export class AuthenticationService {

  private  baseUrl= 'http://localhost:8080/api/v1/auth';

  constructor(private http: HttpClient) {}

  authenticate(credentials: {email: string, password: string}) : Observable<HttpResponse<any>> {
    const apiUrl = `${this.baseUrl}/authenticate` ;
    return this.http.post<any>(apiUrl, credentials, {observe: 'response'}) ;

  }

  
}

login.component.ts :

  
    
  // src/app/login/login.component.ts

import { Component } from '@angular/core';
import { AuthenticationService } from '../authentication/authentication.service';
import { FormControl, FormGroup, ReactiveFormsModule, Validators } from '@angular/forms';
import { FormsModule } from '@angular/forms';
import { HttpResponse } from '@angular/common/http';
import { Router } from '@angular/router';
import { RouterOutlet } from '@angular/router';
@Component({
  selector: 'app-login',
  templateUrl: './login.component.html',
  styleUrls: ['./login.component.css', '../bootstrap-5.3.3-dist/css/bootstrap-grid.css'],
  imports: [FormsModule, ReactiveFormsModule, RouterOutlet],
  standalone: true
})
export class LoginComponent {
  loginForm = new FormGroup ({
    email: new FormControl<string>('', [Validators.required, Validators.email]),
    password: new FormControl<string>('', Validators.required)
  })

  constructor(private authenticationService: AuthenticationService, private router: Router) {}

  getEmail(): string {
    return this.loginForm.get('email')?.value || '' ;
  }

  getPassword(){
    return this.loginForm.get('password')?.value || '' ;
  }

  login() {

    if (this.loginForm.invalid) {
      return ;
    }
    const email: string = this.getEmail();
    const password: string = this.getPassword();

    this.authenticationService.authenticate({ email, password }).subscribe(
      (response: HttpResponse<any>) => {
        console.log('Response:', response);
        if (response.status === 200) {
          console.log('Navigation triggered');
          const token = response.body.token ; 
          localStorage.setItem('token', token);
          this.router.navigate(['/tasksForm']).then(
            success => {
              console.log(success);
              
              if (!success) {
                console.error('Navigation failed');
              }
            }
          );
        } else {
          console.error('Error:', response.body);
        }
      },
      error => {
        console.error("Err:", error) ;
      }
    );
  }
  // login() { 
  //   this.router.navigate(['/tasksForm']); 
  // }

tasks.component.html

    <div class="task-container">
    @for(task of tasks ; track task) {
    <div class="task-box">
      <h3>{{ task.description }}</h3>
      <p><strong>ID:</strong> {{ task.ID }}</p>
      <p><strong>Executor ID:</strong> {{ task.executorID }}</p>
      <p><strong>Completed:</strong> {{ task.completed ? 'Yes' : 'No' }}</p>
      <p><strong>Deadline:</strong> {{ task.deadline | date }}</p>
    </div>
}
</div>

task.service.ts

    import { HttpClient } from '@angular/common/http';
import { Injectable } from '@angular/core';
import { Task } from '../models/Models.model';
import { Observable } from 'rxjs';

@Injectable({
  providedIn: 'root'
})
export class TaskService {
  baseUrl : string  = "http://localhost:8080/Task"
  constructor(private http : HttpClient) { }

  get getTasks() : Observable<Task[]> {
    const apiUrl = this.baseUrl ;
    const token = localStorage.getItem('token');
    const headers = {
      'Authorization' : `Bearer ${token}`,
      'cors':'no-cors'
    }
    return this.http.get<Task[]>(apiUrl, {headers})
  }

  
  

}

app.routes.ts :

    import { Routes } from '@angular/router';
import { LoginComponent } from './login/login.component';
import { TasksComponent } from './tasks/tasks.component';

export const routes: Routes = [
    {path: '', component: LoginComponent },
    {path: 'tasksForm', component: TasksComponent},
    {path: '**', redirectTo: '' }

];

models :

    export interface Task {
    ID: Number ;
    description : string ;
    completed : boolean ;
    executorID : Number ;
    deadline : Date ; 
}
export interface User {
    firstname : string ;
    lastname : string ;
    email : string ;
    password : string ;
}