/*
* Copyright 2010-2011 Ning, Inc.
*
* Ning 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 com.ning.billing.overdue.applicator;
import java.io.IOException;
import java.util.LinkedList;
import java.util.List;
import java.util.UUID;
import org.joda.time.DateTime;
import org.joda.time.LocalDate;
import org.joda.time.Period;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.ning.billing.ErrorCode;
import com.ning.billing.account.api.Account;
import com.ning.billing.account.api.AccountApiException;
import com.ning.billing.account.api.AccountUserApi;
import com.ning.billing.catalog.api.ActionPolicy;
import com.ning.billing.entitlement.api.user.EntitlementUserApi;
import com.ning.billing.entitlement.api.user.EntitlementUserApiException;
import com.ning.billing.entitlement.api.user.Subscription;
import com.ning.billing.entitlement.api.user.SubscriptionBundle;
import com.ning.billing.junction.api.Blockable;
import com.ning.billing.junction.api.Blockable.Type;
import com.ning.billing.junction.api.BlockingApi;
import com.ning.billing.junction.api.BlockingApiException;
import com.ning.billing.junction.api.DefaultBlockingState;
import com.ning.billing.ovedue.notification.OverdueCheckPoster;
import com.ning.billing.overdue.OverdueApiException;
import com.ning.billing.overdue.OverdueCancellationPolicicy;
import com.ning.billing.overdue.OverdueChangeEvent;
import com.ning.billing.overdue.OverdueService;
import com.ning.billing.overdue.OverdueState;
import com.ning.billing.overdue.config.api.BillingState;
import com.ning.billing.overdue.config.api.OverdueException;
import com.ning.billing.util.bus.Bus;
import com.ning.billing.util.callcontext.CallContext;
import com.ning.billing.util.callcontext.CallContextFactory;
import com.ning.billing.util.callcontext.CallOrigin;
import com.ning.billing.util.callcontext.UserType;
import com.ning.billing.util.clock.Clock;
import com.ning.billing.util.email.DefaultEmailSender;
import com.ning.billing.util.email.EmailApiException;
import com.ning.billing.util.email.EmailConfig;
import com.ning.billing.util.email.EmailSender;
import com.google.common.collect.ImmutableList;
import com.google.inject.Inject;
import com.samskivert.mustache.MustacheException;
public class OverdueStateApplicator<T extends Blockable> {
private static final String API_USER_NAME = "OverdueStateApplicator";
private static final Logger log = LoggerFactory.getLogger(OverdueStateApplicator.class);
private final BlockingApi blockingApi;
private final Clock clock;
private final OverdueCheckPoster poster;
private final Bus bus;
private final AccountUserApi accountUserApi;
private final EntitlementUserApi entitlementUserApi;
private final CallContextFactory factory;
private final OverdueEmailGenerator overdueEmailGenerator;
private final EmailSender emailSender;
@Inject
public OverdueStateApplicator(final BlockingApi accessApi, final AccountUserApi accountUserApi, final EntitlementUserApi entitlementUserApi,
final Clock clock, final OverdueCheckPoster poster, final OverdueEmailGenerator overdueEmailGenerator,
final EmailConfig config, final Bus bus, final CallContextFactory factory) {
this.blockingApi = accessApi;
this.accountUserApi = accountUserApi;
this.entitlementUserApi = entitlementUserApi;
this.clock = clock;
this.poster = poster;
this.overdueEmailGenerator = overdueEmailGenerator;
this.emailSender = new DefaultEmailSender(config);
this.bus = bus;
this.factory = factory;
}
public void apply(final OverdueState<T> firstOverdueState, final BillingState<T> billingState,
final T overdueable, final String previousOverdueStateName, final OverdueState<T> nextOverdueState) throws OverdueException {
try {
// We did not reach first state, we we need to check if there is any pending condition for which we will not receive
// any notifications.. (last two conditions are there for test purpose)
if (nextOverdueState.isClearState() && firstOverdueState != null && billingState != null) {
final LocalDate firstUnpaidInvoice = billingState.getDateOfEarliestUnpaidInvoice();
if (firstUnpaidInvoice != null) {
final Period reevaluationInterval = firstOverdueState.getReevaluationInterval();
createFutureNotification(overdueable, firstUnpaidInvoice.toDateTimeAtCurrentTime().plus(reevaluationInterval));
}
}
if (previousOverdueStateName.equals(nextOverdueState.getName())) {
return; // That's it, we are done...
}
storeNewState(overdueable, nextOverdueState);
cancelSubscriptionsIfRequired(overdueable, nextOverdueState);
sendEmailIfRequired(billingState, overdueable, nextOverdueState);
// Add entry in notification queue
final Period reevaluationInterval = nextOverdueState.getReevaluationInterval();
if (!nextOverdueState.isClearState()) {
createFutureNotification(overdueable, clock.getUTCNow().plus(reevaluationInterval));
}
} catch (OverdueApiException e) {
if (e.getCode() != ErrorCode.OVERDUE_NO_REEVALUATION_INTERVAL.getCode()) {
throw new OverdueException(e);
}
}
if (nextOverdueState.isClearState()) {
clear(overdueable);
}
try {
bus.post(createOverdueEvent(overdueable, previousOverdueStateName, nextOverdueState.getName()));
} catch (Exception e) {
log.error("Error posting overdue change event to bus", e);
}
}
private OverdueChangeEvent createOverdueEvent(final T overdueable, final String previousOverdueStateName, final String nextOverdueStateName) throws BlockingApiException {
return new DefaultOverdueChangeEvent(overdueable.getId(), Blockable.Type.get(overdueable), previousOverdueStateName, nextOverdueStateName, null);
}
protected void storeNewState(final T blockable, final OverdueState<T> nextOverdueState) throws OverdueException {
try {
blockingApi.setBlockingState(new DefaultBlockingState(blockable.getId(), nextOverdueState.getName(), Blockable.Type.get(blockable),
OverdueService.OVERDUE_SERVICE_NAME, blockChanges(nextOverdueState), blockEntitlement(nextOverdueState), blockBilling(nextOverdueState)));
} catch (Exception e) {
throw new OverdueException(e, ErrorCode.OVERDUE_CAT_ERROR_ENCOUNTERED, blockable.getId(), blockable.getClass().getName());
}
}
private boolean blockChanges(final OverdueState<T> nextOverdueState) {
return nextOverdueState.blockChanges();
}
private boolean blockBilling(final OverdueState<T> nextOverdueState) {
return nextOverdueState.disableEntitlementAndChangesBlocked();
}
private boolean blockEntitlement(final OverdueState<T> nextOverdueState) {
return nextOverdueState.disableEntitlementAndChangesBlocked();
}
protected void createFutureNotification(final T overdueable, final DateTime timeOfNextCheck) {
poster.insertOverdueCheckNotification(overdueable, timeOfNextCheck);
}
protected void clear(final T blockable) {
// Need to clear the override table here too (when we add it)
poster.clearNotificationsFor(blockable);
}
private void cancelSubscriptionsIfRequired(final T blockable, final OverdueState<T> nextOverdueState) throws OverdueException {
if (nextOverdueState.getSubscriptionCancellationPolicy() == OverdueCancellationPolicicy.NONE) {
return;
}
try {
final ActionPolicy actionPolicy;
switch (nextOverdueState.getSubscriptionCancellationPolicy()) {
case END_OF_TERM:
actionPolicy = ActionPolicy.END_OF_TERM;
break;
case IMMEDIATE:
actionPolicy = ActionPolicy.IMMEDIATE;
break;
default:
throw new IllegalStateException("Unexpected OverdueCancellationPolicy " + nextOverdueState.getSubscriptionCancellationPolicy());
}
final List<Subscription> toBeCancelled = new LinkedList<Subscription>();
computeSubscriptionsToCancel(blockable, toBeCancelled);
final CallContext context = factory.createCallContext(API_USER_NAME, CallOrigin.INTERNAL, UserType.SYSTEM);
for (final Subscription cur : toBeCancelled) {
cur.cancelWithPolicy(clock.getUTCNow(), actionPolicy, context);
}
} catch (EntitlementUserApiException e) {
throw new OverdueException(e);
}
}
@SuppressWarnings("unchecked")
private void computeSubscriptionsToCancel(final T blockable, final List<Subscription> result) throws EntitlementUserApiException {
if (blockable instanceof Subscription) {
result.add((Subscription) blockable);
} else if (blockable instanceof SubscriptionBundle) {
for (final Subscription cur : entitlementUserApi.getSubscriptionsForBundle(blockable.getId())) {
computeSubscriptionsToCancel((T) cur, result);
}
} else if (blockable instanceof Account) {
for (final SubscriptionBundle cur : entitlementUserApi.getBundlesForAccount(blockable.getId())) {
computeSubscriptionsToCancel((T) cur, result);
}
}
}
private void sendEmailIfRequired(final BillingState<T> billingState, final T overdueable, final OverdueState<T> nextOverdueState) {
// Note: we don't want to fail the full refresh call because sending the email failed.
// That's the reason why we catch all exceptions here.
// The alternative would be to: throw new OverdueApiException(e, ErrorCode.EMAIL_SENDING_FAILED);
// If sending is not configured, skip
if (nextOverdueState.getEnterStateEmailNotification() == null) {
return;
}
// Retrieve the account
final Account account;
final Type overdueableType = Blockable.Type.get(overdueable);
try {
if (Type.SUBSCRIPTION.equals(overdueableType)) {
final UUID bundleId = ((Subscription) overdueable).getBundleId();
final SubscriptionBundle bundle = entitlementUserApi.getBundleFromId(bundleId);
account = accountUserApi.getAccountById(bundle.getAccountId());
} else if (Type.SUBSCRIPTION_BUNDLE.equals(overdueableType)) {
final UUID bundleId = ((SubscriptionBundle) overdueable).getId();
final SubscriptionBundle bundle = entitlementUserApi.getBundleFromId(bundleId);
account = accountUserApi.getAccountById(bundle.getAccountId());
} else if (Type.ACCOUNT.equals(overdueableType)) {
account = (Account) overdueable;
} else {
log.warn("Unable to retrieve account for overdueable {} (type {})", overdueable.getId(), overdueableType);
return;
}
} catch (EntitlementUserApiException e) {
log.warn(String.format("Unable to retrieve account for overdueable %s (type %s)", overdueable.getId(), overdueableType), e);
return;
} catch (AccountApiException e) {
log.warn(String.format("Unable to retrieve account for overdueable %s (type %s)", overdueable.getId(), overdueableType), e);
return;
}
final List<String> to = ImmutableList.<String>of(account.getEmail());
// TODO - should we look at the account CC: list?
final List<String> cc = ImmutableList.<String>of();
final String subject = nextOverdueState.getEnterStateEmailNotification().getSubject();
try {
// Generate and send the email
final String emailBody = overdueEmailGenerator.generateEmail(account, billingState, overdueable, nextOverdueState);
if (nextOverdueState.getEnterStateEmailNotification().isHTML()) {
emailSender.sendHTMLEmail(to, cc, subject, emailBody);
} else {
emailSender.sendPlainTextEmail(to, cc, subject, emailBody);
}
} catch (IOException e) {
log.warn(String.format("Unable to generate or send overdue notification email for account %s and overdueable %s", account.getId(), overdueable.getId()), e);
} catch (EmailApiException e) {
log.warn(String.format("Unable to send overdue notification email for account %s and overdueable %s", account.getId(), overdueable.getId()), e);
} catch (MustacheException e) {
log.warn(String.format("Unable to generate overdue notification email for account %s and overdueable %s", account.getId(), overdueable.getId()), e);
}
}
}