Additional User Info Utility (additionalUserInfo.tsx)

Types

AdditionalUserInfo

An interface describing extra information about a user:

• isNewUser: boolean – Whether the user is new to the app.

• profile: object | null – The user's profile information (may include name, given_name, family_name, email, picture).

• providerId: string | null – The authentication provider's ID (e.g., "google.com").

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Functions

getAdditionalUserInfo(userCredential: UserCredential): AdditionalUserInfo

Extracts additional user information from a Firebase UserCredential object.

• If userCredential is falsy, returns default values (isNewUser: false, profile: null, providerId: null).

• Otherwise, uses Firebase's getAdditionalUserInfo to extract:

  • isNewUser: Whether the user just registered.

  • profile: The user's profile object, if available.

  • providerId: The provider's ID.

Returns:
An AdditionalUserInfo object with the extracted data.

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This utility is used to determine if a user is new and to access their profile details after authentication, especially useful for social logins (e.g., Google).