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