BillBean.java

package fi.insomnia.bortal.beans;

import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Calendar;
import java.util.Collection;
import java.util.List;

import javax.annotation.security.DeclareRoles;
import javax.annotation.security.RolesAllowed;
import javax.ejb.EJB;
import javax.ejb.LocalBean;
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.PdfPrinter;
import fi.insomnia.bortal.bortal.views.BillSummary;
import fi.insomnia.bortal.enums.apps.BillPermission;
import fi.insomnia.bortal.facade.BillFacade;
import fi.insomnia.bortal.facade.BillLineFacade;
import fi.insomnia.bortal.facade.UserFacade;
import fi.insomnia.bortal.model.AccountEvent;
import fi.insomnia.bortal.model.Bill;
import fi.insomnia.bortal.model.BillLine;
import fi.insomnia.bortal.model.LanEvent;
import fi.insomnia.bortal.model.Product;
import fi.insomnia.bortal.model.User;
import fi.insomnia.bortal.util.MailMessage;
import fi.insomnia.bortal.utilities.I18n;

/**
 * Session Bean implementation class BillBean
 */
@Stateless
@LocalBean
@DeclareRoles({ "USER", "BILL/WRITE_ALL", "BILL/READ_ALL", "BILL/CREATE_BILL" })
public class BillBean implements BillBeanLocal {

	private static final Logger logger = LoggerFactory.getLogger(BillBean.class);
	@EJB
	private BillFacade billFacade;

	@EJB
	private EventBeanLocal eventbean;
	@EJB
	private BillLineFacade billLineFacade;
	@PersistenceContext
	private EntityManager em;

	@EJB
	private PermissionBeanLocal permbean;
	@EJB
	private ProductBeanLocal productBean;

	@EJB
	private PlaceBean placebean;

	@EJB
	private PermissionBeanLocal permissionbean;
	@EJB
	private UserFacade userfacade;
	@EJB
	private UtilBean utilbean;

	/**
	 * Default constructor.
	 */
	public BillBean() {
		// TODO Auto-generated constructor stub
	}

	@Override
	@RolesAllowed("USER")
	public Bill findById(int id) {
		LanEvent event = eventbean.getCurrentEvent();
		if (id <= 0) {
			return null;
		}
		Bill bill = billFacade.find(event, id);
		User currentuser = permbean.getCurrentUser();
		logger.debug("bill {} user {}", bill, currentuser);

		if (bill != null && !currentuser.equals(bill.getUser()) && !permbean.hasPermission(BillPermission.READ_ALL)) {
			bill = null;
		}
		return bill;

	}

	@Override
	public void getPdfBillStream(Bill bill, OutputStream ostream) {
		if (bill == null) {
			return;
		}
		if (bill.getBillNumber() == null || bill.getBillNumber() <= 0) {
			generateBillNumber(bill);
		}
		new PdfPrinter(bill).output(ostream);
	}

	private void generateBillNumber(Bill bill) {
		if (bill.getBillNumber() == null || bill.getBillNumber() == 0) {
			LanEvent currEvent = eventbean.getCurrentEvent();

			Integer billnr = billFacade.getBiggestBillNumber();

			if (billnr == null || billnr < currEvent.getNextBillNumber()) {
				billnr = currEvent.getNextBillNumber();
			} else {
				++billnr;
			}
			bill.setBillNumber(billnr);
			billFacade.merge(bill);
		}

	}

	// @Override
	// public Bill createEmptyBill(User shoppingUser) throws
	// PermissionDeniedException {
	// if (permbean.isCurrentUser(shoppingUser)) {
	// permbean.fatalPermission(BillPermission.CREATE_BILL,
	// "No permission to create empty bill for self");
	// } else {
	// permbean.fatalPermission(BillPermission.WRITE_ALL,
	// "Trying to create bill to someone else without sufficient permission");
	// }
	//
	// 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
	// @RolesAllowed("SHOP/EXECUTE")
	// public BillLine addProductToBill(Bill bill, Product product, BigDecimal
	// count) throws PermissionDeniedException {
	//
	// // If bill number > 0 bill has been sent and extra privileges are needed
	// // to modify.
	// boolean iscurrent = permissionbean.isCurrentUser(bill.getUser());
	// Integer billnr = bill.getBillNumber();
	// if (!iscurrent || billnr != null) {
	// permbean.fatalPermission(BillPermission.WRITE_ALL,
	// "User tried to modify bill ", bill, "without sufficient permissions");
	// }
	// BillLine line = new BillLine(bill, product.getName(),
	// product.getUnitName(), count, product.getPrice(), product.getVat());
	// line.setLineProduct(product);
	// billLineFacade.create(line);
	//
	// List<Discount> discounts = productBean.getActiveDiscounts(product,
	// count);
	//
	// for (Discount disc : discounts) {
	// BigDecimal unitPrice =
	// product.getPrice().subtract(product.getPrice().multiply(disc.getPercentage())).negate().setScale(2,
	// RoundingMode.HALF_UP);
	// BigDecimal vatPrice =
	// product.getVat().subtract(product.getVat().multiply(disc.getPercentage())).negate().setScale(2,
	// RoundingMode.HALF_UP);
	//
	// BillLine discountLine = new BillLine(bill, disc.getShortdesc(),
	// product.getUnitName(), count, unitPrice, vatPrice);
	// billLineFacade.create(discountLine);
	//
	// }
	//
	// em.flush();
	// return line;
	// }

	@Override
	@RolesAllowed("BILL/READ_ALL")
	public List<Bill> findAll() {

		return billFacade.findAll(eventbean.getCurrentEvent());
	}

	@Override
	@RolesAllowed("BILL/READ_ALL")
	public Collection<BillSummary> getBillLineSummary() {
		Collection<BillSummary> ret = billLineFacade.getLineSummary(eventbean.getCurrentEvent());

		return ret;
	}

	@Override
	@RolesAllowed("BILL/WRITE_ALL")
	public void markPaid(Bill bill, Calendar when) {

		Product creditproduct = productBean.findCreditProduct();

		AccountEvent ac = productBean.createAccountEvent(creditproduct, bill.totalPrice(), bill.getUser());
		ac.setDelivered(when);
		ac.setEventTime(when);
		ac.setBill(bill);
		ac.setSeller(permbean.getCurrentUser());

		bill.setAccountEvent(ac);
		bill.setPaidDate(when);

		bill = billFacade.merge(bill);

		for (BillLine bl : bill.getBillLines()) {
			Product prod = bl.getLineProduct();
			if (prod != null) {
				if (prod.isPrepaidInstant()) {
					logger.debug("Creating Bill prepaidInstant product {}, {}", prod.getName(), bl.getQuantity());
					if (prod.getPlaces().size() > 0) {
						placebean.lockPlaceProduct(bill.getUser(), prod, bl.getQuantity());
					}

					productBean.createAccountEvent(prod, bl.getQuantity(), bill.getUser());

				}
			}
		}
		MailMessage msg = new MailMessage();
		msg.setSubject(I18n.get("bill.billMarkedPaidMail.subject"));
		msg.setMessage(I18n.get("bill.billMarkedPaidMail.message", (bill.getBillNumber() == null) ? "----" : bill.getBillNumber().toString()));
		msg.setTo(bill.getUser());
		utilbean.sendMail(msg);
	}

	@Override
	@RolesAllowed("BILL/CREATE_BILL")
	public void createBill(Bill bill) throws PermissionDeniedException {
		if (!permbean.isCurrentUser(bill.getUser())) {
			permbean.fatalPermission(BillPermission.WRITE_ALL, "Not enought rights to create bill for user ", bill.getUser());
		}
		User user = userfacade.find(bill.getUser().getId());
		if (user.getBills() == null) {
			user.setBills(new ArrayList<Bill>());
		}
		user.getBills().add(bill);

	}
}