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// Copyright (c) 2003-present, Jodd Team (http://jodd.org)
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice,
// this list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
// POSSIBILITY OF SUCH DAMAGE.
package jodd.mail;
import jakarta.activation.DataHandler;
import jakarta.activation.DataSource;
import jakarta.mail.MessagingException;
import jakarta.mail.Part;
import jakarta.mail.Session;
import jakarta.mail.Transport;
import jakarta.mail.internet.InternetAddress;
import jakarta.mail.internet.MimeBodyPart;
import jakarta.mail.internet.MimeMessage;
import jakarta.mail.internet.MimeMultipart;
import jodd.util.StringPool;
import java.util.ArrayList;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import static jakarta.mail.Message.RecipientType;
/**
* Encapsulates {@link Email} sending session. Prepares and sends {@link #sendMail(Email)} {@link Email}s.
*/
public class SendMailSession extends MailSession {
private static final String ALTERNATIVE = "alternative";
private static final String RELATED = "related";
private static final String CHARSET = ";charset=";
private static final String INLINE = "inline";
static {
setupSystemMailProperties();
}
/**
* Creates new mail session.
*
* @param session {@link Session}
* @param transport {@link Transport}
*/
public SendMailSession(final Session session, final Transport transport) {
super(session, transport);
}
@Override
public Transport getService() {
return (Transport) service;
}
/**
* Prepares message and sends it. Returns Message ID of sent email.
*
* @param email {@link Email} to send.
* @return String representing message ID.
*/
public String sendMail(final Email email) {
try {
final MimeMessage msg = createMessage(email);
getService().sendMessage(msg, msg.getAllRecipients());
return msg.getMessageID();
} catch (final MessagingException msgexc) {
throw new MailException("Failed to send email: " + email, msgexc);
}
}
// ---------------------------------------------------------------- adapter
/**
* Creates new {@link MimeMessage} from an {@link Email}.
*
* @param email {@link Email} to be created as a {@link MimeMessage}.
* @return {@link MimeMessage} created from an {@link Email}.
* @throws MessagingException if there is a failure
*/
protected MimeMessage createMessage(final Email email) throws MessagingException {
final Email clone = email.clone();
final MimeMessage newMsg = new MimeMessage(getSession());
setPeople(clone, newMsg);
setSubject(clone, newMsg);
setSentDate(clone, newMsg);
setHeaders(clone, newMsg);
addBodyData(clone, newMsg);
return newMsg;
}
/**
* Sets subject in msgToSet from subject in emailWithData.
*
* @param emailWithData {@link Email} with data
* @param msgToSet {@link MimeMessage} to set data into.
* @throws MessagingException if there is a failure
*/
private static void setSubject(final Email emailWithData, final MimeMessage msgToSet) throws MessagingException {
if (emailWithData.subjectEncoding() != null) {
msgToSet.setSubject(emailWithData.subject(), emailWithData.subjectEncoding());
} else {
msgToSet.setSubject(emailWithData.subject());
}
}
/**
* Sets sent date in msgToSet with sent date from emailWithData.
*
* @param emailWithData {@link Email} with data
* @param msgToSet {@link MimeMessage} to set data into.
* @throws MessagingException if there is a failure
*/
private static void setSentDate(final Email emailWithData, final MimeMessage msgToSet) throws MessagingException {
Date date = emailWithData.sentDate();
if (date == null) {
date = new Date();
}
msgToSet.setSentDate(date);
}
/**
* Sets headers in msgToSet with headers from emailWithData.
*
* @param emailWithData {@link Email} with data
* @param msgToSet {@link MimeMessage} to set data into.
* @throws MessagingException if there is a failure
*/
private static void setHeaders(final Email emailWithData, final MimeMessage msgToSet) throws MessagingException {
final Map headers = emailWithData.headers();
if (headers != null) {
for (final Map.Entry entry : headers.entrySet()) {
msgToSet.setHeader(entry.getKey(), entry.getValue());
}
}
}
/**
* Sets FROM, REPLY-TO and recipients.
*
* @param emailWithData {@link Email} with data
* @param msgToSet {@link MimeMessage} to set data into.
* @throws MessagingException if there is a failure
*/
private void setPeople(final Email emailWithData, final MimeMessage msgToSet) throws MessagingException {
msgToSet.setFrom(emailWithData.from().toInternetAddress());
msgToSet.setReplyTo(EmailAddress.convert(emailWithData.replyTo()));
setRecipients(emailWithData, msgToSet);
}
/**
* Sets TO, CC and BCC in msgToSet with TO, CC and BCC from emailWithData.
*
* @param emailWithData {@link Email} with data
* @param msgToSet {@link MimeMessage} to set data into.
* @throws MessagingException if there is a failure.
*/
private void setRecipients(final Email emailWithData, final MimeMessage msgToSet) throws MessagingException {
// TO
final InternetAddress[] to = EmailAddress.convert(emailWithData.to());
if (to.length > 0) {
msgToSet.setRecipients(RecipientType.TO, to);
}
// CC
final InternetAddress[] cc = EmailAddress.convert(emailWithData.cc());
if (cc.length > 0) {
msgToSet.setRecipients(RecipientType.CC, cc);
}
// BCC
final InternetAddress[] bcc = EmailAddress.convert(emailWithData.bcc());
if (bcc.length > 0) {
msgToSet.setRecipients(RecipientType.BCC, bcc);
}
}
/**
* Adds message data and attachments.
*
* @param emailWithData {@link Email} with data
* @param msgToSet {@link MimeMessage} to set data into.
* @throws MessagingException if there is a failure.
*/
private void addBodyData(final Email emailWithData, final MimeMessage msgToSet) throws MessagingException {
final List messages = emailWithData.messages();
final int totalMessages = messages.size();
// Need to use new list since filterEmbeddedAttachments(List) removes attachments from the source List
final List> attachments = new ArrayList<>(emailWithData.attachments());
if (attachments.isEmpty() && totalMessages == 1) {
// special case: no attachments and just one content
setContent(messages.get(0), msgToSet);
} else {
final MimeMultipart multipart = new MimeMultipart();
final MimeMultipart msgMultipart = new MimeMultipart(ALTERNATIVE);
multipart.addBodyPart(getBaseBodyPart(msgMultipart));
for (final EmailMessage emailMessage : messages) {
msgMultipart.addBodyPart(getBodyPart(emailMessage, attachments));
}
addAnyAttachments(attachments, multipart);
msgToSet.setContent(multipart);
}
}
/**
* Returns new {@link MimeBodyPart} with content set as msgMultipart.
*
* @param msgMultipart {@link MimeMultipart} to add to the new {@link MimeBodyPart}.
* @return new {@link MimeBodyPart} with content set as msgMultipart.
* @throws MessagingException if there is a failure.
*/
private static MimeBodyPart getBaseBodyPart(final MimeMultipart msgMultipart) throws MessagingException {
final MimeBodyPart bodyPart = new MimeBodyPart();
bodyPart.setContent(msgMultipart);
return bodyPart;
}
/**
* @param emailMessage {@link EmailMessage} with data.
* @param attachments {@link List} of {@link EmailAttachment}s.
* @return new {@link MimeBodyPart} with data from emailMessage and attachments.
* @throws MessagingException if there is a failure.
*/
private MimeBodyPart getBodyPart(final EmailMessage emailMessage, final List> attachments) throws MessagingException {
final MimeBodyPart bodyPart = new MimeBodyPart();
// detect embedded attachments
final List> embeddedAttachments = filterEmbeddedAttachments(attachments, emailMessage);
if (embeddedAttachments.isEmpty()) {
// no embedded attachments, just add message
setContent(emailMessage, bodyPart);
} else {
attachments.removeAll(embeddedAttachments);
// embedded attachments detected, join them as related
final MimeMultipart relatedMultipart = new MimeMultipart(RELATED);
final MimeBodyPart messageData = new MimeBodyPart();
setContent(emailMessage, messageData);
relatedMultipart.addBodyPart(messageData);
addAnyAttachments(embeddedAttachments, relatedMultipart);
bodyPart.setContent(relatedMultipart);
}
return bodyPart;
}
/**
* Sets emailWithData content into msgToSet.
*
* @param emailWithData {@link EmailMessage} with data.
* @param partToSet {@link Part} to set data into.
* @throws MessagingException if there is a failure.
*/
private static void setContent(final EmailMessage emailWithData, final Part partToSet) throws MessagingException {
partToSet.setContent(emailWithData.getContent(), emailWithData.getMimeType() + CHARSET + emailWithData.getEncoding());
}
/**
* Creates attachment body part. Handles regular and inline attachments.
*
* @param attachment Body part {@link EmailAttachment}.
* @return {@link MimeBodyPart} which represents body part attachment.
* @throws MessagingException if there is a failure.
*/
protected MimeBodyPart createAttachmentBodyPart(final EmailAttachment attachment) throws MessagingException {
final MimeBodyPart part = new MimeBodyPart();
final String attachmentName = attachment.getEncodedName();
if (attachmentName != null) {
part.setFileName(attachmentName);
}
part.setDataHandler(new DataHandler(attachment.getDataSource()));
if (attachment.getContentId() != null) {
part.setContentID(StringPool.LEFT_CHEV + attachment.getContentId() + StringPool.RIGHT_CHEV);
}
if (attachment.isInline()) {
part.setDisposition(INLINE);
}
return part;
}
/**
* Filters out the {@link List} of embedded {@link EmailAttachment}s for given {@link EmailMessage}.
* This will remove the embedded attachments from the {@link List} and return them in a new {@link List}.
*
* @param attachments {@link List} of attachments to search for in emailMessage.
* @param emailMessage {@link EmailMessage} to see if attachment is embedded into.
* @return {@link List} of embedded {@link EmailAttachment}s; otherwise, returns empty {@link List}.
*/
protected static List> filterEmbeddedAttachments(final List> attachments, final EmailMessage emailMessage) {
final List> embeddedAttachments = new ArrayList<>();
if (attachments == null || attachments.isEmpty() || emailMessage == null) {
return embeddedAttachments;
}
final Iterator> iterator = attachments.iterator();
while (iterator.hasNext()) {
final EmailAttachment emailAttachment = iterator.next();
if (emailAttachment.isEmbeddedInto(emailMessage)) {
embeddedAttachments.add(emailAttachment);
iterator.remove();
}
}
return embeddedAttachments;
}
/**
* Adds {@link List} of {@link EmailAttachment}s to multipart.
*
* @param attachments {@link List} of {@link EmailAttachment}s to add to multipart. This can be {@code null}.
* @param multipart {@link MimeMultipart} to set data into.
* @throws MessagingException if there is a failure.
*/
private void addAnyAttachments(final List> attachments, final MimeMultipart multipart) throws MessagingException {
for (final EmailAttachment attachment : attachments) {
final MimeBodyPart bodyPart = createAttachmentBodyPart(attachment);
multipart.addBodyPart(bodyPart);
}
}
}
