public void copySubscribers(AEntity from, AEntity to) {
Subscription fromSubscription = subscriptionDao.getSubscriptionBySubject(from);
if (fromSubscription == null || fromSubscription.isSubscribersEmailsEmpty()) return;
Subscription toSubscription = subscriptionDao.getSubscriptionBySubject(to);
if (toSubscription == null) toSubscription = subscriptionDao.postSubscription(to);
toSubscription.addSubscribersEmails(fromSubscription.getSubscribersEmails());
}
public void subscribe(String email, AEntity subject) {
if (!Str.isEmail(email)) throw new RuntimeException("Invalid email: " + email);
email = email.toLowerCase();
Subscription subscription = subscriptionDao.getSubscriptionBySubject(subject);
if (subscription == null) subscription = subscriptionDao.postSubscription(subject);
subscription.addSubscribersEmail(email);
log.info(email, "subscribed to", subject);
}