@memberjunction/ng-auth-services

@memberjunction/ng-auth-services

Angular authentication services for MemberJunction Explorer applications. Provides a unified abstraction layer supporting multiple OAuth providers (Auth0, Microsoft MSAL, Okta) through a consistent, type-safe API.

Overview

This package implements a provider-agnostic authentication system using the Strategy pattern. A single abstract base class (MJAuthBase) defines the contract, while concrete providers handle Auth0, MSAL (Azure AD), and Okta specifics. Application code interacts only with the standardized interface, making provider switches a configuration change rather than a code change.

graph TD
    A["MJAuthBase\n(Abstract Service)"] --> B["MJAuth0Provider"]
    A --> C["MJMSALProvider"]
    A --> D["MJOktaProvider"]
    B --> E["@auth0/auth0-angular"]
    C --> F["@azure/msal-angular"]
    D --> G["@okta/okta-auth-js"]

    style A fill:#7c5295,stroke:#563a6b,color:#fff
    style B fill:#2d6a9f,stroke:#1a4971,color:#fff
    style C fill:#2d6a9f,stroke:#1a4971,color:#fff
    style D fill:#2d6a9f,stroke:#1a4971,color:#fff
    style E fill:#2d8659,stroke:#1a5c3a,color:#fff
    style F fill:#2d8659,stroke:#1a5c3a,color:#fff
    style G fill:#2d8659,stroke:#1a5c3a,color:#fff

Features

• Unified Authentication Interface: Standardized API across all providers via IAngularAuthProvider
• Multiple Provider Support: Auth0, Microsoft MSAL (Azure AD), and Okta
• Standardized Types (v3.0.0): StandardUserInfo, StandardAuthToken, StandardAuthError eliminate leaky abstractions
• Semantic Error Classification: AuthErrorType enum replaces provider-specific error checking
• Token Management: ID token retrieval, token info, and automatic refresh
• Observable State: Reactive authentication state, user info, and email streams
• Configuration Validation: Each provider declares and validates its required configuration
• Angular 21+ Compatible: Built for modern Angular applications

Installation

npm install @memberjunction/ng-auth-services

Key Dependencies

Dependency	Purpose
@angular/core, @angular/common	Angular framework
@auth0/auth0-angular	Auth0 provider (peer)
@azure/msal-angular, @azure/msal-browser	MSAL provider (peer)
@okta/okta-auth-js	Okta provider (peer)
@memberjunction/core	Core MJ utilities
rxjs	Reactive state management

Configuration

Environment Setup

// Auth0
export const environment = {
  AUTH_TYPE: 'auth0',
  AUTH0_DOMAIN: 'your-domain.auth0.com',
  AUTH0_CLIENTID: 'your-auth0-client-id',
};

// MSAL (Azure AD)
export const environment = {
  AUTH_TYPE: 'msal',
  CLIENT_ID: 'your-azure-ad-client-id',
  CLIENT_AUTHORITY: 'https://login.microsoftonline.com/your-tenant-id',
};

// Okta
export const environment = {
  AUTH_TYPE: 'okta',
  OKTA_ISSUER: 'https://your-org.okta.com/oauth2/default',
  OKTA_CLIENTID: 'your-okta-client-id',
};

Module Setup

import { AuthServicesModule } from '@memberjunction/ng-auth-services';

@NgModule({
  imports: [
    AuthServicesModule.forRoot(environment),
  ]
})
export class AppModule {}

Usage

Authentication Operations (v3.0.0 API)

import { MJAuthBase, StandardUserInfo } from '@memberjunction/ng-auth-services';

@Component({ selector: 'app-header', template: '...' })
export class HeaderComponent {
  constructor(private authBase: MJAuthBase) {}

  async ngOnInit() {
    // Reactive auth state
    this.authBase.isAuthenticated().subscribe(isAuth => { /* ... */ });

    // Standardized user info
    this.authBase.getUserInfo().subscribe((user: StandardUserInfo | null) => {
      if (user) console.log(`Welcome ${user.name}!`);
    });

    // Token management
    const token = await this.authBase.getIdToken();
    const tokenInfo = await this.authBase.getTokenInfo();
  }

  login() { this.authBase.login(); }
  logout() { this.authBase.logout(); }
}

Error Handling

import { AuthErrorType } from '@memberjunction/ng-auth-services';

try {
  await this.authBase.refreshToken();
} catch (err) {
  const authError = this.authBase.classifyError(err);
  switch (authError.type) {
    case AuthErrorType.TOKEN_EXPIRED:
      // Session expired
      break;
    case AuthErrorType.USER_CANCELLED:
      // User cancelled - no error needed
      break;
    case AuthErrorType.NETWORK_ERROR:
      // Connectivity issue
      break;
  }
}

Exported API

Export	Type	Description
MJAuthBase	Abstract Service	Base authentication service all providers implement
IAngularAuthProvider	Interface	Contract for authentication providers
AngularAuthProviderFactory	Factory	Creates provider instances from configuration
AuthServicesModule	NgModule	Module with forRoot() configuration
RedirectComponent	Component	Handles OAuth redirect callbacks
StandardUserInfo	Interface	Standardized user profile data
StandardAuthToken	Interface	Standardized token information
StandardAuthError	Interface	Standardized error with classification
AuthErrorType	Enum	Semantic error categories
TokenRefreshResult	Interface	Token refresh operation result
AuthState	Interface	Complete authentication state snapshot

Build

cd packages/Angular/Explorer/auth-services && npm run build

License

ISC