@PageScoped
public class NoteModel {
private ProxyHandler listenersHandle = new ProxyHandler(NoteModelListener.class);
private NoteModelListener listeners = listenersHandle.getProxy(NoteModelListener.class);
@Provided private final CloudSession session;
@Inject
public NoteModel(CloudSession session) {
this.session = session;
}
public NoteModel addListener(NoteModelListener listener) {
listenersHandle.addListener(listener);
return this;
}
public void addNote(String title, String content) {
String id = getNoteProvider(true).addNote(title, content);
session.set(id, content);
listeners.noteAdded(id);
}
public void selectNote(String id) {
NoteHeader note = getNoteProvider(false).getNote(id);
if (note != null && !note.isLocked()) {
getNoteProvider(true).lock(id);
listeners.noteSelected(id);
}
}
public void storeNote(String id, String title, String content) {
NoteHeader note = getNoteProvider(false).getNote(id);
if (note != null) {
setChanged();
note.setTitle(title);
session.set(id, content);
listeners.noteChanced(id);
}
}
public String getNoteContent(String id) {
return id == null ? null : session.get(id, String.class);
}
private NoteProvider getNoteProvider(boolean changed) {
NoteProvider provider = session.get(NoteProvider.class);
if (provider == null) {
provider = new NoteProvider();
session.set(provider);
} else if (changed) {
setChanged();
}
return provider;
}
public void unlock(String id) {
NoteHeader note = getNoteProvider(false).getNote(id);
if (note != null) {
note.setLockedUntil(null);
setChanged();
listeners.noteUnlocked(id);
}
}
private void setChanged() {
session.set(session.get((NoteProvider.class)));
}
public Collection<NoteHeader> getNoteHeaders() {
return getNoteProvider(false).getNotes();
}
public NoteHeader getNoteHeader(String id) {
return getNoteProvider(false).getNote(id);
}
public void lock(String id) {
NoteHeader note = getNoteProvider(false).getNote(id);
if (note != null) {
getNoteProvider(true).lock(id);
listeners.noteChanced(id);
}
}
public void remove(String id) {
if (getNoteProvider(false).removeNote(id)) {
setChanged();
listeners.noteRemoved(id);
}
}
}
