package services;

import org.springframework.transaction.annotation.Transactional;

import org.hibernate.SessionFactory;

import org.hibernate.Session;

import data.*;

import java.util.List;

// This class is the business services tier in the application.

// @Transactional is needed so that a Hibernate transaction is set up,

// otherwise updates won't have an affect

@Transactional

public class Services {

// So Spring can inject the session factory

SessionFactory sessionFactory;

public void setSessionFactory(SessionFactory value) {

sessionFactory = value;

}

// Shortcut for sessionFactory.getCurrentSession()

public Session sess() {

return sessionFactory.getCurrentSession();

}

public Event getEventById(long id) {

return (Event) sess().load(Event.class, id);

}

public Person getPersonById(long id) {

return (Person) sess().load(Person.class, id);

}

public void deleteEventById(long id) {

sess().delete(getEventById(id));

}

public void deletePersonById(long id) {

sess().delete(getPersonById(id));

}

public void createEvent(String name) {

Event theEvent = new Event();

theEvent.setName(name);

sess().save(theEvent);

}

public void createPerson(String name) {

Person p = new Person();

p.setName(name);

sess().save(p);

}

@SuppressWarnings("unchecked")

public List<Event> getEvents() {

return sess().createQuery("from Event").list();

}

@SuppressWarnings("unchecked")

public List<Person> getPeople() {

return sess().createQuery("from Person").list();

}

public void removePersonFromEvent(int personId, int eventId) {

getEventById(eventId).getPeople().remove(getPersonById(personId));

}

public void addPersonToEvent(int personId, int eventId) {

getEventById(eventId).getPeople().add(getPersonById(personId));

}

}