BillBean.java
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package fi.insomnia.bortal.beans;
import java.io.ByteArrayOutputStream;
import java.math.BigDecimal;
import java.math.MathContext;
import java.util.List;
import javax.ejb.EJB;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import fi.insomnia.bortal.beanutil.AuthorisationBeanLocal;
import fi.insomnia.bortal.beanutil.AuthorisationBeanLocal.Right;
import fi.insomnia.bortal.beanutil.AuthorisationBeanLocal.RightType;
import fi.insomnia.bortal.beanutil.PdfPrinter;
import fi.insomnia.bortal.enums.Permission;
import fi.insomnia.bortal.enums.RolePermission;
import fi.insomnia.bortal.exceptions.PermissionDeniedException;
import fi.insomnia.bortal.facade.BillFacade;
import fi.insomnia.bortal.facade.BillLineFacade;
import fi.insomnia.bortal.facade.EventFacade;
import fi.insomnia.bortal.model.Bill;
import fi.insomnia.bortal.model.BillLine;
import fi.insomnia.bortal.model.Discount;
import fi.insomnia.bortal.model.LanEvent;
import fi.insomnia.bortal.model.Product;
import fi.insomnia.bortal.model.User;
/**
* Session Bean implementation class BillBean
*/
@Stateless
public class BillBean implements BillBeanLocal {
private static final Logger logger = LoggerFactory.getLogger(BillBean.class);
private static final MathContext MATHCONTEXT_TWOSCALE = new MathContext(2);;
@EJB
private BillFacade billFacade;
@EJB
private UserBeanLocal userBean;
@EJB
private SecurityBeanLocal secubean;
@EJB
private AuthorisationBeanLocal authbean;
@EJB
private EventBeanLocal eventbean;
@EJB
private EventFacade eventfacade;
@EJB
private BillLineFacade billLineFacade;
@PersistenceContext
private EntityManager em;
/**
* Default constructor.
*/
public BillBean() {
// TODO Auto-generated constructor stub
}
public Bill findById(int id) {
LanEvent event = eventbean.getCurrentEvent();
if (id <= 0) {
return null;
}
Bill bill = billFacade.find(event.getId(), id);
User currentuser = userBean.getCurrentUser();
if (!currentuser.equals(bill.getUser())) {
userBean.fatalPermission(Permission.USER_MANAGEMENT, RolePermission.READ, "User tried to print the bill with insufficient rights. Bill id: ", bill);
}
return bill;
}
@Override
public ByteArrayOutputStream getPdfBillStream(Bill bill) {
if (bill == null) {
return null;
}
if (bill.getBillNumber() == null || bill.getBillNumber() <= 0) {
generateBillNumber(bill);
}
return new PdfPrinter(bill).output();
}
private void generateBillNumber(Bill bill) {
if (bill.getBillNumber() == null || bill.getBillNumber() == 0) {
LanEvent currEvent = eventbean.getCurrentEvent();
Integer billnr = billFacade.getBiggestBillNumber(currEvent);
if (billnr == null || billnr < currEvent.getNextBillNumber()) {
billnr = currEvent.getNextBillNumber();
} else {
++billnr;
}
bill.setBillNumber(billnr);
billFacade.merge(bill);
}
}
@Override
public Bill createEmptyBill(User shoppingUser) {
if (shoppingUser != null && !userBean.isCurrentUser(shoppingUser)) {
userBean.fatalPermission(Permission.USER_MANAGEMENT, RolePermission.EXECUTE, "User tried to shop to ", shoppingUser, " another without sufficient rights");
}
if (shoppingUser == null) {
shoppingUser = userBean.getCurrentUser();
}
LanEvent event = eventbean.getCurrentEvent();
Bill ret = new Bill(event, shoppingUser);
billFacade.create(ret);
ret.setUser(shoppingUser);
em.flush();
logger.debug("Created bill with id {} and user {}", ret.getId(), ret.getUser());
return ret;
}
@Override
public BillLine addProductToBill(Bill bill, Product product, BigDecimal count) {
// If bill number > 0 bill has been sent and extra privileges are needed
// to modify.
boolean iscurrent = userBean.isCurrentUser(bill.getUser());
Integer billnr = bill.getBillNumber();
if (!iscurrent || billnr != null) {
userBean.fatalPermission(Permission.USER_MANAGEMENT, RolePermission.EXECUTE, "User tried to modify bill ", bill, "without sufficient permissions");
}
BillLine line = new BillLine(bill, product.getName(), product.getUnitName(), count, product.getPrice(), product.getVat());
billLineFacade.create(line);
for (Discount disc : product.getDiscounts()) {
if (disc.isActive() && count.compareTo(disc.getAmountMax()) <= 0 && count.compareTo(disc.getAmountMin()) >= 0) {
BigDecimal disccounts = count;
if (disc.getMaxNum().compareTo(disccounts) >= 0) {
disccounts = disc.getMaxNum();
}
BillLine discountLine = new BillLine(bill, disc.getShortdesc(), product.getUnitName(), disccounts,
product.getPrice().subtract(product.getPrice().multiply(disc.getPercentage(), MATHCONTEXT_TWOSCALE)).negate(),
product.getVat().subtract(product.getVat().multiply(disc.getPercentage(), MATHCONTEXT_TWOSCALE)).negate());
billLineFacade.create(discountLine);
}
}
em.flush();
return line;
}
}