Setting up user roles using Firebase Auth in NextJS application

Seeking a solution to implement a multi-level role system for my blog website. Currently utilizing Firebase Auth for authentication with email/password, but all users have the same posting/editing access. Looking to differentiate between Admins, Moderators, and Users, but roles are not part of the default Firebase User model.

Wondering how to transition my current setup to incorporate roles without having to start from scratch. Considering options like Firestore or Firebase Auth SDK, as well as the Identity Platform feature that I'm unfamiliar with.

Current tech stack includes:

  • NextJS 13 (Javascript only) with integrated Next API (SSR)
  • Deployed on Vercel
  • Database split between Firebase Storage assets (images) and MongoDB
javascriptfirebasenext.jsfirebase-authentication

Answer №1

Firebase Authentication focuses solely on verifying the user's identity and does not include any built-in authorization mechanisms to determine what actions a user is allowed to perform.

However, there are various ways to implement an authorization model on top of Firebase. Some key points to consider include:

  • You can store authorization information, such as user roles, either as custom claims in the user's profile or as separate records in a database.

  • To secure access to files in Cloud Storage, you can utilize Firebase security rules. Refer to the Firebase documentation for guidance on implementing custom-claim attributes and roles.

    • Keep in mind that security rules apply when accessing Cloud Storage through Firebase client-side SDKs, but not when using download URLs or Google Cloud (server-side) SDKs.
    • In addition to storing user roles as custom claims, you now have the option to leverage Firestore in Storage security rules for role information storage.

  • When working with MongoDB, you will need to handle authorization logic within your code. If authorization data is stored as custom claims in user profiles, you can decode the token to retrieve the information. Alternatively, if data is stored in a database, you can fetch and apply it accordingly.

Answer №2

One option is to establish a custom user database or repository that tracks each user's role based on their email address or unique identifier.

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