How to wrap Firebase Firestore database listeners to a GlobalScope.rxFlowable. Given that Firestore callback called every time when the database updated.
private fun <T> Query.realTimeUpdates(klass: Class<T>): Flowable<FirestoreResult> = GlobalScope.rxFlowable {
suspendCancellableCoroutine {
addSnapshotListener { collectionSnapshot: QuerySnapshot?, _: FirebaseFirestoreException? ->
launch {
logD(TAG, "realTimeUpdates query -> in thread ${Thread.currentThread().name}")
if (collectionSnapshot != null && !collectionSnapshot.isEmpty)
send(FirestoreResult.Success(collectionSnapshot.toObjects(klass)))
else send(FirestoreResult.Error("Error : unknown error."))
}
}
}
}
Thanks