import java.io.IOException;
import java.io.PrintWriter;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
 
import javax.persistence.EntityManager;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import net.fortuna.ical4j.data.CalendarOutputter;
import net.fortuna.ical4j.model.Calendar;
import net.fortuna.ical4j.model.DateTime;
import net.fortuna.ical4j.model.ValidationException;
import net.fortuna.ical4j.model.component.VEvent;
import net.fortuna.ical4j.model.property.Attendee;
import net.fortuna.ical4j.model.property.CalScale;
import net.fortuna.ical4j.model.property.Description;
import net.fortuna.ical4j.model.property.DtEnd;
import net.fortuna.ical4j.model.property.Organizer;
import net.fortuna.ical4j.model.property.ProdId;
import net.fortuna.ical4j.model.property.Uid;
import net.fortuna.ical4j.model.property.Version;
 
import org.domain.ida.entity.Reservation;
import org.jboss.seam.Component;
import org.jboss.seam.servlet.ContextualHttpServletRequest;
 
public class Calfeed extends HttpServlet{
 
EntityManager entityManager;
 
public void doGet(final HttpServletRequest request, final HttpServletResponse response) throws IOException, ServletException {
new ContextualHttpServletRequest((HttpServletRequest)request)  {
public void process() throws ServletException, IOException {
HttpServletRequest req = (HttpServletRequest) request;
HttpServletResponse resp = (HttpServletResponse) response;
 
entityManager = (EntityManager)Component.getInstance("entityManager");
// Get the value of a request parameter; the name is case-sensitive
String name = "userloginpass";
String value = req.getParameter(name);
 
// The following generates a page showing all the request parameters
PrintWriter out = resp.getWriter();
String[] lp = value.split(":");
 
List res =(List<Reservation>)(entityManager.createQuery("select r FROM Reservation r, Appointment a where r.appointment.appointmentId = a.appointmentId and a.user.email = :umail and a.user.password = :upass")
.setParameter("umail", lp[0]).setParameter("upass", lp[1]).getResultList());
 
final Calendar calendar = new Calendar();
calendar.getProperties().add(new ProdId("-//Ben Fortuna//iCal4j 1.0//EN"));
calendar.getProperties().add(Version.VERSION_2_0);
calendar.getProperties().add(CalScale.GREGORIAN);
 
final List events = new ArrayList();
for (Iterator i = res.iterator(); i.hasNext();) {
final Reservation entry = (Reservation) i.next();
final VEvent event = new VEvent(new DateTime(entry.getAppointment().getStartTime()), entry.getAppointment().getName());
event.getProperties().add(new DtEnd(new DateTime(entry.getAppointment().getEndTime())));
event.getProperties().add(new Description(entry.getAppointment().getShortDescription()));
event.getProperties().add(new Uid("IDA"+entry.getReservationId()));
 
//If wrong data, do nothing
try {
event.getProperties().add(new Attendee("ROLE=ATTENDEE;CN="+entry.getUser().getName()+" "+entry.getUser().getLastname()+";MAILTO="+entry.getUser().getEmail()));
} catch (URISyntaxException e) {
 
}
events.add(event);
}
calendar.getComponents().addAll(events);
 
resp.setContentType("text/calendar");
final CalendarOutputter output = new CalendarOutputter();
try {
output.output(calendar, out);
} catch (ValidationException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
out.close();
}
}.run();
}
}