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package com.juick.server;
import com.juick.Message;
import com.juick.User;
import com.juick.server.api.SystemActivity;
import com.juick.service.EmailService;
import com.juick.service.MessagesService;
import com.juick.service.UserService;
import com.juick.service.component.*;
import com.juick.util.MessageUtils;
import com.mitchellbosecke.pebble.PebbleEngine;
import com.mitchellbosecke.pebble.template.PebbleTemplate;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.stereotype.Component;
import javax.annotation.Nonnull;
import javax.inject.Inject;
import javax.mail.MessagingException;
import javax.mail.Multipart;
import javax.mail.Session;
import javax.mail.Transport;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeBodyPart;
import javax.mail.internet.MimeMessage;
import javax.mail.internet.MimeMultipart;
import java.io.IOException;
import java.io.StringWriter;
import java.io.Writer;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Properties;
import static com.juick.formatters.PlainTextFormatter.formatPost;
import static com.juick.formatters.PlainTextFormatter.formatUrl;
@Component
public class EmailManager implements NotificationListener {
public static final String MSGID_PATTERN = "\\.|@|<";
private static final Logger logger = LoggerFactory.getLogger(EmailManager.class);
@Inject
private EmailService emailService;
@Inject
private MessagesService messagesService;
@Inject
private UserService userService;
@Inject
private PebbleEngine pebbleEngine;
@Override
public void processSystemEvent(@Nonnull SystemEvent systemEvent) {
var activity = systemEvent.getActivity();
var msg = activity.getMessage();
var subscribers = activity.getTo();
if (activity.getType().equals(SystemActivity.ActivityType.message)) {
processMessage(msg, subscribers);
}
}
private void processMessage(com.juick.Message msg, List<User> subscribedUsers) {
if (msg.isService()) {
return;
}
if (MessageUtils.isPM(msg)) {
String subject = String.format("Private message from %s", msg.getUser().getName());
emailService.getEmails(msg.getTo().getUid(), true).forEach(email -> {
emailNotify(email, subject, msg);
});
} else if (MessageUtils.isReply(msg)) {
Message originalMessage = messagesService.getMessage(msg.getMid()).orElseThrow(IllegalStateException::new);
String subject = String.format("New reply to %s", originalMessage.getUser().getName());
subscribedUsers.stream()
.flatMap(user -> emailService.getEmails(user.getUid(), true).stream())
.forEach(email -> emailNotify(email, subject, msg));
} else {
String subject = String.format("New message from %s", msg.getUser().getName());
subscribedUsers
.forEach(user -> emailService.getEmails(user.getUid(), true)
.forEach(email -> emailNotify(email, subject, msg)));
}
}
@Override
public void processPingEvent(PingEvent pingEvent) {
}
private void emailNotify(String email, String subject, Message msg) {
Map<String, String> headers = new HashMap<>();
if (!MessageUtils.isPM(msg)) {
headers.put("Message-ID", String.format("<%d.%d@juick.com>", msg.getMid(), msg.getRid()));
}
if (MessageUtils.isReply(msg)) {
if (msg.getReplyto() > 0) {
Message replyto = messagesService.getReply(msg.getMid(), msg.getReplyto());
headers.put("In-Reply-To", String.format("<%d.%d@juick.com>", replyto.getMid(), replyto.getRid()));
} else {
Message original = messagesService.getMessage(msg.getMid()).orElseThrow(IllegalStateException::new);
headers.put("In-Reply-To", String.format("<%d.%d@juick.com>", original.getMid(), original.getRid()));
}
}
String plainText = renderPlaintext(formatPost(msg), formatUrl(msg)).orElseThrow(IllegalStateException::new);
String hash = userService.getHashByUID(userService.getUserByEmail(email).getUid());
String htmlText = renderHtml(MessageUtils.formatHtml(msg), formatUrl(msg), msg, hash).orElseThrow(IllegalStateException::new);
sendEmail(StringUtils.EMPTY, email, subject, plainText, htmlText, headers);
}
public boolean sendEmail(String from, String to, String subject, String textPart, String htmlPart, Map<String, String> messageHeaders) {
Properties prop = System.getProperties();
prop.put("mail.smtp.starttls.enable", "true");
Session session = Session.getDefaultInstance(prop);
try {
Transport transport = session.getTransport("smtp");
MimeMessage message = new MimeMessage(session) {
protected void updateMessageID() throws MessagingException {
for (Map.Entry<String, String> entry: messageHeaders.entrySet()) {
setHeader(entry.getKey(), entry.getValue());
}
}
};
String fromAddress = StringUtils.isNotEmpty(from) ? from : "juick@juick.com";
message.setFrom(fromAddress);
message.addRecipient(javax.mail.Message.RecipientType.TO, new InternetAddress(to));
message.setSubject(subject);
MimeBodyPart textBodyPart = new MimeBodyPart();
textBodyPart.setContent(textPart, "text/plain; charset=UTF-8");
Multipart multipart = new MimeMultipart("alternative");
multipart.addBodyPart(textBodyPart);
if (StringUtils.isNotBlank(htmlPart)) {
MimeBodyPart htmlBodyPart = new MimeBodyPart();
htmlBodyPart.setContent(htmlPart, "text/html; charset=UTF-8");
multipart.addBodyPart(htmlBodyPart);
}
message.setContent(multipart);
User emailUser = userService.getUserByEmail(to);
if (!emailUser.isAnonymous()) {
message.setHeader("List-Id", "Juick notifications <mail-notifications.juick.com>");
message.setHeader("List-Post", "<mailto:juick@juick.com>");
message.setHeader("List-Owner", "<mailto:support@juick.com>");
message.setHeader("List-Archive", "<https://juick.com/>");
message.setHeader("List-Unsubscribe", String.format("https://juick.com/settings/unsubscribe?hash=%s",
userService.getHashByUID(emailUser.getUid())));
message.setHeader("List-Unsubscribe-Post", "List-Unsubscribe=One-Click");
}
message.saveChanges();
transport.connect();
transport.sendMessage(message, message.getAllRecipients());
return true;
} catch (MessagingException ex) {
logger.error("mail exception", ex);
return false;
}
}
public Optional<String> renderPlaintext(String body, String messageUrl) {
PebbleTemplate noteTemplate = pebbleEngine.getTemplate("email/plaintext");
Map<String, Object> context = new HashMap<>();
context.put("messageBody", body);
context.put("messageUrl", messageUrl);
try {
Writer writer = new StringWriter();
noteTemplate.evaluate(writer, context);
return Optional.of(writer.toString());
} catch (IOException e) {
return Optional.empty();
}
}
public Optional<String> renderHtml(String body, String messageUrl, Message msg, String hash) {
PebbleTemplate noteTemplate = pebbleEngine.getTemplate("email/html");
Map<String, Object> context = new HashMap<>();
context.put("messageBody", body);
context.put("messageUrl", messageUrl);
context.put("msg", msg);
context.put("hash", hash);
try {
Writer writer = new StringWriter();
noteTemplate.evaluate(writer, context);
return Optional.of(writer.toString());
} catch (IOException e) {
return Optional.empty();
}
}
}
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