package be.simplenotes.domain.security

import be.simplenotes.types.LoggedInUser
import com.auth0.jwt.exceptions.JWTVerificationException
import javax.inject.Singleton

@Singleton
class JwtPayloadExtractor(private val jwt: SimpleJwt) {
    operator fun invoke(token: String): LoggedInUser? = try {
        val decodedJWT = jwt.verifier.verify(token)
        val id = decodedJWT.getClaim(userIdField).asInt() ?: null
        val username = decodedJWT.getClaim(usernameField).asString() ?: null
        id?.let { username?.let { LoggedInUser(id, username) } }
    } catch (e: JWTVerificationException) {
        null
    } catch (e: IllegalArgumentException) {
        null
    }
}