@Service
public class CustomMessageServiceImpl implements Serializable {

    @Autowired
    private MailMessageSender mailMessageSender;

    @Autowired
    private Configuration configuration;

    private final Locale locale = new Locale("ru");


    public void sendCustomMail(HashMap<String, String> recipients, String subject, String message)  {

        SimpleHash model = new SimpleHash();

        for (Map.Entry<String, String> emailName : recipients.entrySet()){
            if (message.contains("${name}")){
                message = message.replace("${name}", emailName.getValue());
            }
            model.put("message", message);
            String buildHTML = null;
            try {
                buildHTML = FreeMarkerTemplateUtils.processTemplateIntoString(configuration
                        .getTemplate("customMail.ftl", locale, "UTF-8"), model);
            } catch (IOException | TemplateException e) {
                e.printStackTrace();
            }
            message = message.replace(emailName.getValue(), "${name}");
            model.remove("message");
            createMessageMail(buildHTML, emailName.getKey(), subject);
        }
    }

    private void createMessageMail(String HTMLTemplateAsString, String userEmailTo, String mailSubject) {
        Mail mail = new Mail();
        mail.setMessage(HTMLTemplateAsString);
        mail.setSubject(mailSubject);
        mail.setTo(userEmailTo);
        mailMessageSender.sendMail(mail);
    }


    public void sendCustomMail(List<AuthorProfile> recipients, String subject, String message) {
        HashMap<String, String> emailName = new HashMap<>();
        for (AuthorProfile profile : recipients){
            emailName.put(profile.getEmail(), profile.getFirstName());
        }
        sendCustomMail(emailName, subject, message);
    }
}