// Email Sender Module
// Sends emails via Gmail SMTP using nodemailer
import nodemailer from 'nodemailer';
import { emailConfig } from './config.js';
// Retry settings
const MAX_RETRIES = 3;
const RETRY_DELAYS = [5000, 15000, 45000]; // 5s, 15s, 45s
/**
* Create nodemailer transporter
*/
function createTransporter() {
return nodemailer.createTransport({
service: 'gmail',
auth: {
user: emailConfig.user,
pass: emailConfig.appPassword
}
});
}
/**
* Sleep for specified milliseconds
*/
function sleep(ms) {
return new Promise(resolve => setTimeout(resolve, ms));
}
/**
* Send email with retry logic
*/
export async function sendEmail({ subject, html, text }) {
const transporter = createTransporter();
const mailOptions = {
from: `Home Controller <${emailConfig.user}>`,
to: emailConfig.recipient,
subject: subject,
html: html,
text: text || 'Please view this email in an HTML-capable email client.'
};
let lastError = null;
for (let attempt = 0; attempt < MAX_RETRIES; attempt++) {
try {
const info = await transporter.sendMail(mailOptions);
console.log(`Email sent successfully: ${info.messageId}`);
return { success: true, messageId: info.messageId };
} catch (error) {
lastError = error;
console.error(`Email send attempt ${attempt + 1} failed:`, error.message);
if (attempt < MAX_RETRIES - 1) {
const delay = RETRY_DELAYS[attempt];
console.log(`Retrying in ${delay / 1000} seconds...`);
await sleep(delay);
}
}
}
return {
success: false,
error: lastError?.message || 'Failed to send email after all retries'
};
}
/**
* Verify SMTP connection
*/
export async function verifyConnection() {
try {
const transporter = createTransporter();
await transporter.verify();
console.log('SMTP connection verified successfully');
return { success: true };
} catch (error) {
console.error('SMTP connection failed:', error.message);
return { success: false, error: error.message };
}
}
/**
* Send test email
*/
export async function sendTestEmail() {
const subject = '🧪 Home Controller - Test Email';
const html = `
<!DOCTYPE html>
<html>
<head>
<style>
body { font-family: sans-serif; padding: 20px; }
.container { max-width: 500px; margin: 0 auto; background: #f0f0f0; padding: 20px; border-radius: 8px; }
h1 { color: #667eea; }
</style>
</head>
<body>
<div class="container">
<h1>✅ Test Successful!</h1>
<p>Your Home Controller email reporting is configured correctly.</p>
<p><strong>Sent at:</strong> ${new Date().toLocaleString()}</p>
<p>You will receive:</p>
<ul>
<li>📧 Daily reports at 10:00 PM</li>
<li>📊 Weekly summaries on Saturday at 8:00 AM</li>
</ul>
</div>
</body>
</html>
`;
return sendEmail({ subject, html });
}
