/**
* Follow notification.
*
* @param id the id of the notification.
*/
public static void followNotification(int id) {
User user = Session.user();
Notification notification = user.getNotification(id);
if (notification != null) {
notification.unsetNew();
Entry about = notification.getAbout();
if (about instanceof Answer) {
ActionDefinition action = reverse();
Answer answer = (Answer) about;
Application.question(answer.getQuestion().id());
redirect(action.addRef("answer-" + answer.id()).toString());
} else if (about instanceof Question) {
Application.question(((Question) about).id());
} else if (about instanceof Comment) {
ActionDefinition action = reverse();
Comment comment = (Comment) about;
Application.question(comment.getQuestion().id());
redirect(action.addRef("comment-" + comment.id()).toString());
}
} else if (!redirectToCallingPage()) {
Application.notifications(0);
}
}