/
VacationReply.java
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/
VacationReply.java
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/****************************************************************
* Licensed to the Apache Software Foundation (ASF) under one *
* or more contributor license agreements. See the NOTICE file *
* distributed with this work for additional information *
* regarding copyright ownership. The ASF 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.apache.james.transport.mailets.jsieve;
import java.io.IOException;
import java.util.List;
import javax.activation.DataHandler;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.internet.AddressException;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import javax.mail.util.ByteArrayDataSource;
import org.apache.mailet.Mail;
import org.apache.mailet.MailAddress;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.base.Optional;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
public class VacationReply {
private static final Logger LOGGER = LoggerFactory.getLogger(VacationReply.class);
public static class Builder {
private final Mail originalMail;
private final ActionContext context;
private String from;
private String reason;
private String mime;
private String subject;
public Builder(Mail originalMail, ActionContext context) {
this.originalMail = originalMail;
this.context = context;
}
public Builder from(String from) {
this.from = from;
return this;
}
public Builder reason(String reason) {
this.reason = reason;
return this;
}
public Builder mime(String mime) {
this.mime = mime;
return this;
}
public Builder subject(String subject) {
this.subject = subject;
return this;
}
public VacationReply build() throws MessagingException {
Preconditions.checkState(eitherReasonOrMime());
ActionUtils.detectAndHandleLocalLooping(originalMail, context, "vacation");
MimeMessage reply = (MimeMessage) originalMail.getMessage().reply(false);
reply.setSubject(generateNotificationSubject());
reply.setContent(generateNotificationContent());
return new VacationReply(retrieveOriginalSender(), Lists.newArrayList(originalMail.getSender()), reply);
}
private boolean eitherReasonOrMime() {
return (reason == null) ^ (mime == null);
}
private String generateNotificationSubject() {
return Optional.fromNullable(subject)
.or(context.getRecipient() + " is currently in vacation");
}
private Multipart generateNotificationContent() throws MessagingException {
try {
if (reason != null) {
return generateNotificationContentFromReasonString();
} else {
return generateNotificationContentFromMime();
}
} catch (IOException e) {
throw new MessagingException("Cannot read specified content", e);
}
}
private Multipart generateNotificationContentFromMime() throws MessagingException, IOException {
return new MimeMultipart(new ByteArrayDataSource(mime, "mixed"));
}
private Multipart generateNotificationContentFromReasonString() throws MessagingException, IOException {
Multipart multipart = new MimeMultipart("mixed");
MimeBodyPart reasonPart = new MimeBodyPart();
reasonPart.setDataHandler(
new DataHandler(
new ByteArrayDataSource(
reason,
"text/plain; charset=UTF-8")));
reasonPart.setDisposition(MimeBodyPart.INLINE);
multipart.addBodyPart(reasonPart);
return multipart;
}
private MailAddress retrieveOriginalSender() throws AddressException {
return Optional.fromNullable(from)
.transform(address -> retrieveAddressFromString(address, context))
.or(context.getRecipient());
}
private MailAddress retrieveAddressFromString(String address, ActionContext context) {
try {
return new MailAddress(address);
} catch (AddressException e) {
LOGGER.warn("Mail address " + address + " was not well formatted : " + e.getLocalizedMessage());
return null;
}
}
}
public static Builder builder(Mail originalMail, ActionContext context) {
return new Builder(originalMail, context);
}
private final MailAddress sender;
private final List<MailAddress> recipients;
private final MimeMessage mimeMessage;
private VacationReply(MailAddress sender, List<MailAddress> recipients, MimeMessage mimeMessage) {
this.sender = sender;
this.recipients = recipients;
this.mimeMessage = mimeMessage;
}
public MailAddress getSender() {
return sender;
}
public List<MailAddress> getRecipients() {
return recipients;
}
public MimeMessage getMimeMessage() {
return mimeMessage;
}
}