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/*
* Copyright 2014-2018 Groupon, Inc
* Copyright 2014-2018 The Billing Project, LLC
*
* The Billing Project licenses this file to you under the Apache License, version 2.0
* (the "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package org.killbill.billing.util.bcd;
import java.util.Map;
import java.util.UUID;
import javax.annotation.Nullable;
import org.joda.time.DateTime;
import org.joda.time.LocalDate;
import org.killbill.billing.callcontext.InternalTenantContext;
import org.killbill.billing.catalog.api.BillingAlignment;
import org.killbill.billing.catalog.api.BillingPeriod;
import org.killbill.billing.subscription.api.SubscriptionBase;
import org.killbill.commons.utils.Preconditions;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public abstract class BillCycleDayCalculator {
private static final Logger log = LoggerFactory.getLogger(BillCycleDayCalculator.class);
public static int calculateBcdForAlignment(@Nullable final Map bcdCache, final SubscriptionBase subscription, final SubscriptionBase baseSubscription, final BillingAlignment alignment, final InternalTenantContext internalTenantContext, final int accountBillCycleDayLocal) {
int result = 0;
switch (alignment) {
case ACCOUNT:
Preconditions.checkState(accountBillCycleDayLocal != 0, "Account BCD should be set at this point");
result = accountBillCycleDayLocal;
break;
case BUNDLE:
result = calculateOrRetrieveBcdFromSubscription(bcdCache, baseSubscription, internalTenantContext);
break;
case SUBSCRIPTION:
result = calculateOrRetrieveBcdFromSubscription(bcdCache, subscription, internalTenantContext);
break;
}
return result;
}
public static LocalDate alignProposedBillCycleDate(final LocalDate proposedDate, final int billingCycleDay, final BillingPeriod billingPeriod) {
// billingCycleDay alignment only makes sense for month based BillingPeriod (MONTHLY, QUARTERLY, BIANNUAL, ANNUAL)
final boolean isMonthBased = (billingPeriod.getPeriod().getMonths() | billingPeriod.getPeriod().getYears()) > 0;
if (!isMonthBased) {
return proposedDate;
}
final int lastDayOfMonth = proposedDate.dayOfMonth().getMaximumValue();
int proposedBillCycleDate = proposedDate.getDayOfMonth();
if (billingCycleDay <= lastDayOfMonth) {
proposedBillCycleDate = billingCycleDay;
} else {
proposedBillCycleDate = lastDayOfMonth;
}
return new LocalDate(proposedDate.getYear(), proposedDate.getMonthOfYear(), proposedBillCycleDate, proposedDate.getChronology());
}
public static LocalDate alignProposedBillCycleDate(final DateTime proposedDate, final int billingCycleDay, final BillingPeriod billingPeriod, final InternalTenantContext internalTenantContext) {
final LocalDate proposedLocalDate = internalTenantContext.toLocalDate(proposedDate);
final LocalDate resultingLocalDate = alignProposedBillCycleDate(proposedLocalDate, billingCycleDay, billingPeriod);
return resultingLocalDate;
}
private static LocalDate alignToNextBillCycleDate(final LocalDate prevTransitionDate, final LocalDate curTransitionDate, /* date to be aligned */ final int billingCycleDay, final BillingPeriod billingPeriod) {
// billingCycleDay alignment only makes sense for month based BillingPeriod (MONTHLY, QUARTERLY, BIANNUAL, ANNUAL)
final boolean isMonthBased = (billingPeriod.getPeriod().getMonths() | billingPeriod.getPeriod().getYears()) > 0;
if (!isMonthBased) {
LocalDate newDate = prevTransitionDate.plus(billingPeriod.getPeriod());
while (newDate.isBefore(curTransitionDate)) {
newDate = newDate.plus(billingPeriod.getPeriod());
}
return newDate;
}
if (curTransitionDate.getDayOfMonth() > billingCycleDay) {
return alignProposedBillCycleDate(curTransitionDate.plusMonths(1), billingCycleDay, billingPeriod);
} else {
return alignProposedBillCycleDate(curTransitionDate, billingCycleDay, billingPeriod);
}
}
public static LocalDate alignToNextBillCycleDate(final DateTime prevTransitionDate, final DateTime curTransitionDate,/* date to be aligned */ final int billingCycleDay, final BillingPeriod billingPeriod, final InternalTenantContext internalTenantContext) {
return alignToNextBillCycleDate(internalTenantContext.toLocalDate(prevTransitionDate), internalTenantContext.toLocalDate(curTransitionDate), billingCycleDay, billingPeriod);
}
private static int calculateOrRetrieveBcdFromSubscription(@Nullable final Map bcdCache, final SubscriptionBase subscription, final InternalTenantContext internalTenantContext) {
Integer result = bcdCache != null ? bcdCache.get(subscription.getId()) : null;
if (result == null) {
result = calculateBcdFromSubscription(subscription, internalTenantContext);
if (bcdCache != null) {
bcdCache.put(subscription.getId(), result);
}
}
return result;
}
private static int calculateBcdFromSubscription(final SubscriptionBase subscription, final InternalTenantContext internalTenantContext) {
final DateTime date = subscription.getDateOfFirstRecurringNonZeroCharge();
final int bcdLocal = internalTenantContext.toLocalDate(date).getDayOfMonth();
log.debug("Calculated BCD: subscriptionId='{}', subscriptionStartDate='{}', bcd='{}'",
subscription.getId(), date.toDateTimeISO(), bcdLocal);
return bcdLocal;
}
}
