starr-philproperties/services/email.service.js

/***********************************************************************************************************************************************************************
 * File Name: email.service.js
 * Type of Program: Service
 * Description: Nodemailer-based email service.
 *              Provides:
 *              - sendOTPEmail()    → sends a 6-digit OTP verification email
 *              - sendWelcomeEmail() → sent after successful email verification
 * Author: rgrgogu
 * Date Created: Oct. 6, 2025
 ***********************************************************************************************************************************************************************
 * HOW TO USE:
 *   const emailService = require('../services/email.service');
 *   await emailService.sendOTPEmail(user.email, otp);
 ***********************************************************************************************************************************************************************/
const nodemailer = require('nodemailer');
const { emailTemplates } = require('../data/email_body.data')

const transporter = nodemailer.createTransport({
  host: process.env.SMTP_HOST,
  port: Number(process.env.SMTP_PORT),
  auth: {
    user: process.env.SMTP_USER,
    pass: process.env.SMTP_PASS,
  },
});

const sendEmail = async ({ to, type, data = {} }) => {
  try {
    const templateFn = emailTemplates[type];

    if (!templateFn) {
      throw new Error(`Email template "${type}" not found`);
    }

    const { subject, html } = templateFn(data);

    return await new Promise((resolve, reject) => {
      transporter.sendMail(
        {
          from: {
            name: "STARR System",
            address: "do-not-reply@philproperties.com",
          },
          to,
          subject,
          html,
        },
        (err, info) => {
          if (err) return reject(err);
          resolve(info);
        }
      );
    });
  } catch (err) {
    throw new Error(err.message);
  }
};

const ping = () => transporter.verify();

module.exports = { sendEmail, ping };