the `isNew` boolean inside `SessionStatus` class, is this a 100% guarantee the user is really new? m...

# supabase-kt

[Remy Benza]

the isNew boolean inside SessionStatus class, is this a 100% guarantee the user is really new? meaning the supabase user database has no record for this user? Meaning if i sign in from a different platform (eg ios) and then sign in with same account on android the isNew will return false? Even when the session on that device is 'new' (no local storage)

[Remy Benza]

/**
* Whether the session is new, i.e. [source] is [SessionSource.SignIn], [SessionSource.SignUp] or [SessionSource.External].
* Use this to determine whether this status is the result of a new sign in or sign up or just a session refresh.
*/
val isNew: Boolean = source is SessionSource.SignIn || source is SessionSource.SignUp || source is SessionSource.External

this is what the docs, i want to rely user purchase actions on this boolean, so its important its always correct 🙂

[Remy Benza]

or how else would you verify if the current user has no previous record

[Jan]

so not sure if I understand, what do you mean by no previous record?

[Remy Benza]

example

user A signs in on android device for first time. Purchases a digital item which gets stored in a supabase table

user A signs in 1 month later on ios device (with same Gmail account).

my app should then recognise this user already exists, and fetch the digital item from the supabase table based on userId.

eg after signing in your class SessionStatus should provide me with info whether or not this user has signed in before

[Jan]

Yea so SessionStatus does not know if there is data in other tables for your user, you'd have to implement that logic yourself.
What isNew checks, is whether the user just logged in, so there was no previous session before on this device (e.g. this would not be the case if the session was refreshed, so its not new)

[Remy Benza]

what would be a good approach inside the supabaseClient.auth.sessionStatus stateflow to check if an authenticated user is 'new' in the definition I just gave?

[Remy Benza]

i could look in the appMetaData or userMetadata JsonObjects

[Remy Benza]

with Firebase SDK you have a boolean that tell you just what I need, to know if this user has signed in ever before, on any platform

[Remy Benza]

looking for same thing on your SDK

[Jan]

i could look in the appMetaData or userMetadata JsonObjects

Either store a boolean in there on sign up, or maybe checking if supabaseClient.auth.currentUserOrNull()?.lastSignInAt is null (so there was no previous sign in?) but I'd check that with a new account

[Jan]

I don't know how FB does it but I think its safer to use the metadata or a separate table.

[Remy Benza]

lastSignInAt seems a good fit, im gonna test it with new account, thnx

[Remy Benza]

for brand new user lastSignInAt is still not null, and its also not the same value as createdAt, both are an Instant and around 50ms apart. So basing logic on that but its not best option