package org.bigk.invoices.services;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.lang.math.NumberUtils;
import org.bigk.invoices.exceptions.ServiceException;
import org.bigk.invoices.model.PaymentKind;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
@Service("paymentKindsService")
@Transactional
public class PaymentKindsServiceImpl implements PaymentKindsService {
private static final Logger logger = LoggerFactory.getLogger(PaymentKindsServiceImpl.class);
private static final String ALL_PAYMENT_KINDS_QUERY =
"SELECT pk FROM PaymentKind pk ORDER BY pk.id ASC";
@PersistenceContext
protected EntityManager em;
@Override
public List<PaymentKind> listAllItems() throws ServiceException {
logger.debug("listAllItems() - start");
TypedQuery<PaymentKind> query = em.createQuery(ALL_PAYMENT_KINDS_QUERY, PaymentKind.class);
List<PaymentKind> list = query.getResultList();
logger.debug("listAllItems() - end - read [{}] element(s)", CollectionUtils.size(list));
return list;
}
@Override
public PaymentKind getPaymentKind(Long id) throws ServiceException {
logger.debug("getPaymentKind(id=[{}]) - start", id);
PaymentKind paymentKind = em.find(PaymentKind.class, id);
logger.debug("getPaymentKind() - end - return value=[{}]", paymentKind);
return paymentKind;
}
public Date calculatePaymentDate(Date soldDate, Long paymentKindId)
throws ServiceException {
logger.debug("calculatePaymentDate(soldDate=[{}], paymentKindId=[{}]) - start", soldDate, paymentKindId);
PaymentKind paymentKind = this.getPaymentKind(paymentKindId);
if (paymentKind == null) {
throw new ServiceException("No PaymentKind read for id: " + paymentKindId);
}
Date returnDate = calculatePaymentDate(soldDate, paymentKind.getValue());
logger.debug("calculatePaymentDate() - end - return value=[{}]", returnDate);
return returnDate;
}
public Date calculatePaymentDate(Date soldDate, String paymentKindValue)
throws ServiceException {
logger.debug("calculatePaymentDate(soldDate=[{}], paymentKindValue=[{}]) - start", soldDate, paymentKindValue);
Calendar cal = Calendar.getInstance();
cal.setTime(soldDate);
String formule = paymentKindValue;
if (StringUtils.isNotBlank(formule)) {
formule = StringUtils.lowerCase(formule);
// detect 'period': one of 'd' (day) or 'm' (month)
String period = null;
if (formule.startsWith("d")) {
period = "d";
formule = formule.substring(1);
} else if (formule.startsWith("m")) {
period = "m";
formule = formule.substring(1);
}
// detect 'sign': one of '+' or '-'
int sign = 1;
if (formule.startsWith("+"))
formule = formule.substring(1);
else if (formule.startsWith("-")) {
sign = -1;
formule = formule.substring(1);
}
logger.debug("calculatePaymentDate() - formule=[{}], period=[{}], sign=[{}]",
new Object[] {formule, period, sign});
if ("d".equals(period)) {
int days = sign * NumberUtils.toInt(formule, 0);
cal.add(5, days);
} else if ("m".equals(period)) {
int months = sign * NumberUtils.toInt(formule, 0);
cal.add(2, months);
}
}
Date returnDate = cal.getTime();
logger.debug("calculatePaymentDate() - end - return value=[{}]", returnDate);
return returnDate;
}
}