kz.greetgo.email.real_send_spring.AbstractRealEmailSender Maven / Gradle / Ivy

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package kz.greetgo.email.real_send_spring;

import kz.greetgo.email.Attachment;
import kz.greetgo.email.Email;
import kz.greetgo.email.RealEmailSender;
import org.springframework.mail.MailException;
import org.springframework.mail.javamail.JavaMailSenderImpl;
import org.springframework.mail.javamail.MimeMessageHelper;

import javax.mail.MessagingException;
import javax.mail.internet.InternetAddress;
import javax.mail.internet.MimeMessage;
import javax.mail.util.ByteArrayDataSource;
import java.io.UnsupportedEncodingException;
import java.util.List;
import java.util.Objects;
import java.util.Properties;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.Stream;

public abstract class AbstractRealEmailSender implements RealEmailSender {

  protected abstract SendEmailConfig conf();

  @Override
  public void realSend(Email email) {

    final List addressesToSend = Stream.concat(Stream.of(email.getTo()), email.getCopies().stream())
                                               .filter(Objects::nonNull)
                                               .collect(Collectors.toList());

    if (addressesToSend.isEmpty()) {
      return;
    }

    if (conf().useFake()) {
      trace(() -> "t4C8neHqM0 :: FAKE: Отправка мыла с параметрами: " +
                    "smtpHost = " + conf().smtpHost() + ", smtpPort = " + conf().smtpPort()
                    + ", username = " + conf().username() + ", addressesToSend = " + addressesToSend);
      return;
    }

    JavaMailSenderImpl mailSender = createJavaMailSenderImpl();



    String fromAddress = takeFromAddress(email);

    MimeMessage mimeMessage = convert(mailSender, email, addressesToSend, fromAddress);

    trace(() -> "Ys77B6eHZk :: Отправка мыла с параметрами: " +
                  "smtpHost = " + conf().smtpHost() + ", smtpPort = " + conf().smtpPort() + ", username = " + conf().username()
                  + ", fromAddress = " + fromAddress);

    try {
      mailSender.send(mimeMessage);
    } catch (MailException e) {
      ErrorFilters.mail(e).ignoreUserUnknown().check();
    }

  }

  protected JavaMailSenderImpl createJavaMailSenderImpl() {
    JavaMailSenderImpl impl = new JavaMailSenderImpl();
    impl.setHost(conf().smtpHost());
    impl.setPort(conf().smtpPort());
    impl.setUsername(conf().username());
    impl.setPassword(conf().password());

    Properties props = impl.getJavaMailProperties();
    props.put("mail.transport.protocol", "smtp");
    props.put("mail.smtp.auth", conf().smtpAuth() + "");
    props.put("mail.smtp.ssl.enable", conf().smtpSslEnable() + "");
    props.put("mail.smtp.starttls.enable", conf().smtpStartTlsEnable() + "");
    props.put("mail.mime.charset", conf().mimeCharset() + "");

    populateJavaMailProperties(props);

    return impl;
  }

  protected void populateJavaMailProperties(Properties props) {}

  protected void trace(Supplier message) {}

  private String takeFromAddress(Email email) {
    String fromAddress = email.getFrom();
    if (fromAddress == null || "null".equals(fromAddress)) {
      fromAddress = conf().sendFrom();
    }
    if (fromAddress == null || "null".equals(fromAddress)) {
      fromAddress = "root";
    }

    if (!fromAddress.contains("@")) {
      fromAddress += "@" + defaultEmailDomain();
    }
    return fromAddress;
  }

  protected String defaultEmailDomain() {
    return "greetgo.kz";
  }

  protected MimeMessage convert(JavaMailSenderImpl mailSender, Email email,
                                List toList, String fromAddress) {

    final MimeMessage ret = mailSender.createMimeMessage();

    try {

      MimeMessageHelper helper = new MimeMessageHelper(ret, true, "UTF-8");

      helper.setTo(toList.toArray(new String[0]));
      helper.setSubject(email.getSubject());
      helper.setText(email.getBody(), true);

      if (email.getName() != null) {
        helper.setFrom(new InternetAddress(fromAddress, email.getName()));
      } else {
        helper.setFrom(fromAddress);
      }

      final List attachments = email.getAttachments();


      for (Attachment attachment : attachments) {
        final ByteArrayDataSource data = new ByteArrayDataSource(attachment.data, "text/html");
        helper.addAttachment(attachment.name, data);
      }

      return ret;

    } catch (MessagingException | UnsupportedEncodingException e) {
      throw new RuntimeException(e);
    }
  }
}