javadev / pt-backend

import com.osomapps.pt.dictionary.DictionaryName;

import com.osomapps.pt.dictionary.DictionaryService;

import com.osomapps.pt.email.EmailMessageType;

import com.osomapps.pt.email.EmailMessageTypeRepository;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import lombok.extern.slf4j.Slf4j;

import org.springframework.beans.factory.annotation.Value;

import org.springframework.mail.MailException;

import org.springframework.mail.MailSender;

import org.springframework.mail.SimpleMailMessage;

import org.springframework.stereotype.Service;

@Service

@Slf4j

public class SendEmailService {

    private final MailSender mailSender;

    private final EmailMessageTypeRepository emailMessageTypeRepository;

    private final DictionaryService dictionaryService;

    private final String emailConfirmUrl;

    private final String emailResetUrl;

    private enum MessageType {

        WelcomeMessage,

        ForgetPasswordMessage

    }

    SendEmailService(

            MailSender mailSender,

            EmailMessageTypeRepository emailMessageTypeRepository,

            DictionaryService dictionaryService,

            @Value("${app.email.confirm.url}") String emailConfirmUrl,

            @Value("${app.email.reset.url}") String emailResetUrl) {

        this.mailSender = mailSender;

        this.emailMessageTypeRepository = emailMessageTypeRepository;

        this.dictionaryService = dictionaryService;

        this.emailConfirmUrl = emailConfirmUrl;

        this.emailResetUrl = emailResetUrl;

    }

    String getSubject(String defaultValue, MessageType messageType) {

        List<EmailMessageType> emailMessageTypes =

                emailMessageTypeRepository.findByNameOrderByIdDesc(messageType.name());

        if (emailMessageTypes.isEmpty()) {

            return defaultValue;

        }

        return dictionaryService.getEnValue(

                DictionaryName.email_subject,

                emailMessageTypes

                        .get(emailMessageTypes.size() - 1)

                        .getEmailMessageTemplates()

                        .get(

                                emailMessageTypes

                                                .get(emailMessageTypes.size() - 1)

                                                .getEmailMessageTemplates()

                                                .size()

                                        - 1)

                        .getDEmailSubject(),

                defaultValue);

    }

    public void send(InUserEmail inUserEmail) {

        Map<String, String> parameters = new HashMap<>();

        parameters.put("user_name", inUserEmail.getUser_name());

        parameters.put("email_confirm_link", emailConfirmUrl + inUserEmail.getConfirmToken());

        SimpleMailMessage message = new SimpleMailMessage();

        message.setSubject(

                getSubject(

                        "Welcome to the Personal Trainer application!",

                        MessageType.WelcomeMessage));

        message.setFrom("PT <[email protected]>");

        message.setTo(inUserEmail.getLogin());

        message.setText(

                TemplateEngine.<String, String>template(

                                getText(

                                        "Dear {{user_name}}!\n"

                                                + "\n"

                                                + "Your registration was completed successfully.\n"

                                                + "Please click to the link to confirm your e-mail {{email_confirm_link}}.\n"

                                                + "\n"

                                                + "Yours PT support team.",

                                        MessageType.WelcomeMessage))

                        .apply(parameters));

        try {

            this.mailSender.send(message);

        } catch (MailException ex) {

            log.warn(ex.getMessage(), ex);

        }

    }

    void sendForgotPassword(InUserEmail inUserEmail) {

        Map<String, String> parameters = new HashMap<>();

        parameters.put("user_name", inUserEmail.getUser_name());

        parameters.put("reset_password_link", emailResetUrl + inUserEmail.getResetToken());

        SimpleMailMessage message = new SimpleMailMessage();

        message.setSubject(getSubject("Reset password service", MessageType.ForgetPasswordMessage));

        message.setFrom("PT <[email protected]>");

        message.setTo(inUserEmail.getLogin());

        message.setText(

                TemplateEngine.<String, String>template(

                                getText(

                                        "Dear {{user_name}}!\n"

                                                + "\n"

                                                + "Please click to the link to reset your password {{reset_password_link}}.\n"

                                                + "\n"

                                                + "Sincerely,\n"

                                                + "PT support team",

                                        MessageType.ForgetPasswordMessage))

                        .apply(parameters));

        try {

            this.mailSender.send(message);

        } catch (MailException ex) {

            log.warn(ex.getMessage(), ex);

        }

    }

}