Firebase Firestore

firebaseFirestore.kt

private val auth: FirebaseAuth = FirebaseAuth.getInstance()

suspend fun getUser(): User? {
    var user: UserFromFirebase?
    try {
        val documentSnapshot = db.collection(USERS).document(auth.uid).get().await()
        user = documentSnapshot.toObject()
        Log.d(FIRESTORE, "DocumentSnapshot data: ${documentSnapshot.data}")
    } catch (e: Exception) {
        user = null
        Log.d(FIRESTORE, "get failed with ", e)
    }
    return user?.toUser()
}

suspend fun setUser(user: User) {
    db.collection(USERS).document(auth.uid).set(user, SetOptions.merge())
        .addOnCompleteListener { task ->
            if (task.isSuccessful)
                Log.d(FIRESTORE, "user saved successfully")
            else if(task.isCanceled)
                Log.d(FIRESTORE, "save user failed ", task.exception)
        }
}

suspend fun saveFavRecipe(id: Int) {
    db.collection(USERS).document(auth.uid).update("savedRecipes", FieldValue.arrayUnion(id))
        .addOnCompleteListener { task ->
            if (task.isSuccessful)
                Log.d(FIRESTORE, "fav recipe added")
            else if(task.isCanceled)
                Log.d(FIRESTORE, "fav recipe failed ", task.exception)
        }
}