Satellizer is an authentication library for AngularJS applications designed to manage user sign-in and session persistence using security tokens. It functions as a client-side implementation for exchanging credentials for tokens and attaching authorization headers to network requests.
The library handles identity integration through a token manager that supports both email-based authentication and external OAuth providers. It enables the authorization of users via third-party services using secure popup windows and allows for linking or unlinking external accounts to a user profile.
The project covers the broader surface of client-side session management, including user account registration, the parsing of token payloads to extract identity claims, and the automatic injection of authorization headers into API requests. It also provides utilities for saving and retrieving security tokens from browser storage to maintain state across refreshes.