This Angular code defines an AuthModule that handles user login, including a login form component, routing, and authentication logic using an AuthService.

Run example

npm run import -- "Display login form"

Display login form

import {RouterModule, Routes} from '@angular/router';
import {Component, ModuleWithProviders, NgModule} from '@angular/core';
import {COMMON_MODULES} from '../../../imports/core.module';
import {AuthService} from '../../../imports/auth.service';

@Component({
    selector: 'bc-login',
    template: `
        <form>
            <md-input-container>
                <input mdInput name="signupEmail" required type="email"
                       placeholder="Username"
                       maxlength="100" [(ngModel)]="username">
            </md-input-container>
            <br/>
            <md-input-container>
                <input mdInput name="signupPassword" required type="password" maxlength="25"
                       placeholder="Password"
                       length="40" [(ngModel)]="password">
            </md-input-container>
            <button md-raised-button color="primary"
                    id="signupSubmit" type="submit" (click)="onLogin()">
                Login
            </button>
        </form>
    `,
    styleUrls: ['./login.component.scss']
})
export class LoginComponent {
    username: string;
    password: string;
    service: AuthService

    constructor(public
) {
}

onLogin()
:
void {
    this.service.login(this.username, this.password).subscribe(r => {
    console.log(r);
});
}
}

export const COMPONENTS = [
    LoginComponent
];

export const authRoutes: Routes = [
    {
        path: '',
        component: LoginComponent,
        data: {roles: ['anonymous', 'user']}
    }
];
export const routing: ModuleWithProviders = RouterModule.forChild(authRoutes);

@NgModule({
    imports: [
        ...COMMON_MODULES,
        routing
    ],
    declarations: COMPONENTS,
    exports: COMPONENTS
})
export class AuthModule {
}

// auth.module.ts
import { NgModule } from '@angular/core';
import { CommonModule } from '@angular/common';
import { RouterModule, Routes } from '@angular/router';
import { LoginComponent } from './login/login.component';
import { AuthService } from './auth.service';
import { ReactiveFormsModule } from '@angular/forms';

const authRoutes: Routes = [
  {
    path: '',
    component: LoginComponent,
    data: { roles: ['anonymous', 'user'] }
  }
];

@NgModule({
  imports: [
    CommonModule,
    RouterModule.forChild(authRoutes),
    ReactiveFormsModule
  ],
  declarations: [LoginComponent],
  exports: [LoginComponent]
})
export class AuthModule { }

export const COMPONENTS = [LoginComponent];

This Angular code defines a module (AuthModule) responsible for handling user login functionality.

Here's a breakdown:

1. Imports:

• Imports necessary modules from Angular Router, Core, and custom modules (core.module and auth.service).

2. LoginComponent:

• Defines a component (LoginComponent) responsible for displaying the login form.
  • Template: Uses Material Design components (md-input-container, md-raised-button) to create a form with fields for username and password.
  • Logic:
    • username and password properties store the user's input.
    • onLogin() method is triggered when the login button is clicked.
    • It calls the AuthService.login() method, passing the username and password.
    • The response from the login attempt is logged to the console.

3. Routing:

• Defines a route configuration (authRoutes) that maps the empty path (/) to the LoginComponent.
• The data property specifies that this route is accessible to anonymous users and users with the "user" role.

4. AuthModule:

• Defines the AuthModule which:
  • Imports COMMON_MODULES, the routing configuration, and the LoginComponent.
  • Declares the LoginComponent as part of this module.
  • Exports the LoginComponent so it can be used in other modules.

In summary: This code sets up a basic Angular login system with a form, authentication logic, and routing.