How Can I Securely Combine Two AngularJS Applications with Different Authentication Requirements?

AngularJS Login Authentication with ui-router

Scenario:

You need to combine two AngularJS applications into one with different authentication requirements: the home section for signing in and signing up, and the dashboard section for authenticated users.

Solution

1. Create an Identity Service:

   This service manages the user's identity, including authentication status and essential information like display name and roles.

2. Authorization Service:

   This service checks if the user is authenticated and authorized to access the requested state. It redirects to the sign-in or access denied page as needed.

3. Handle State Changes:

   Listen for state changes and perform authorization checks using the authorization service. This ensures that the user is properly authenticated before the state transition completes.

4. Resolve Identity in Parent State:

   Configure a parent state for the entire application and resolve the identity there. This ensures that the identity is resolved before any auth checks occur.

5. Conditionally Redirect to States:

   Use data properties in state configurations to specify the required roles for access. Unauthenticated users are redirected to the sign-in page, and unauthorized users are redirected to an access denied page.

6. Inject Principal into Controller:

   Inject the principal service into the controller to check authentication status or role membership in the view.

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