How to Integrate AngularJS Applications with ui-router for Secure Login and Role-Based Access?

AngularJS ui-router Login Authentication: Combining Sections with Different Apps

Problem:

You have two AngularJS applications with ui-router configurations, one for the homepage and another for the dashboard. After successful login, how do you redirect the homepage app to the dashboard app?

Solution:

To combine the two sections with different AngularJS apps, follow these steps:

1. Implement Identity Management:
   Create a service to authenticate and track the user's identity (principal). Resolve this identity before any state changes.
2. Authorization Checks:
   Create a service (authorization) that performs authorization checks before state changes using the principal service. If the user is not authenticated or fails a role check, redirect them to the appropriate page.
3. Listen to State Changes:
   In the AngularJS config block, add a listener to the $stateChangeStart event. Use this listener to initiate authorization checks.
4. Force Identity Resolution:
   Resolve the identity in ui-router's authorize state using the resolve property. This ensures that identity resolution occurs before authorization checks.
5. Conditional Route Redirection:
   If authorization checks fail, prevent the current state change by canceling the route transition or redirecting to a different route.
6. Handle Sign Out:
   Implement a mechanism for signing out a user, which will clear the identity and redirect to the homepage.
7. Assign Roles to States:
   Add the data.roles property to states that require specific roles for access. The authorization service will use this to perform role checks.
8. Conditional View Elements:
   Use the principal service to conditionally display view elements based on authentication status or role assignment.

By implementing these steps, you can successfully combine two AngularJS applications with different ui-router configurations and ensure proper login authentication and role-based access controls.

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