Initial commit: teaching institution management API.

Express/MongoDB backend with JWT auth, RBAC, S3 uploads, notifications, and scheduled jobs.

utils/senders/emailSender.js

@@ -0,0 +1,52 @@
+// /utils/senders/emailSender.js
+
+const nodemailer = require('nodemailer');
+const config = require('../../config/config');
+const logger = require('../logger');
+
+let transporter = null;
+
+const getTransporter = () => {
+  if (!transporter) {
+    transporter = nodemailer.createTransport({
+      host: config.SMTP_HOST,
+      port: config.SMTP_PORT,
+      secure: config.SMTP_PORT === 465,
+      auth: config.SMTP_USER ? {
+        user: config.SMTP_USER,
+        pass: config.SMTP_PASS
+      } : undefined
+    });
+  }
+  return transporter;
+};
+
+const sendEmail = async ({ to, subject, body, html }) => {
+  try {
+    if (!to) throw new Error('Recipient email is required');
+
+    const mailOptions = {
+      from: config.EMAIL_FROM,
+      to,
+      subject,
+      text: body,
+      html: html || `<p>${body}</p>`
+    };
+
+    if (config.NODE_ENV === 'test' || !config.SMTP_USER) {
+      logger.info(`[EmailSender MOCK] To: ${to} | Subject: ${subject} | Body: ${body}`);
+      return { success: true, messageId: `mock_${Date.now()}` };
+    }
+
+    const info = await getTransporter().sendMail(mailOptions);
+    logger.info(`[EmailSender] Message sent: ${info.messageId} to ${to}`);
+    return { success: true, messageId: info.messageId };
+  } catch (error) {
+    logger.error(`[EmailSender ERROR] Failed to send email to ${to}: ${error.message}`);
+    throw error;
+  }
+};
+
+module.exports = {
+  sendEmail
+};