composa/examples/advanced/03_newsletter_campaign.js

Compose beautiful multilingual emails with XHTML templates and Nodemailer

import { EmailClient, defaultSubjects } from "composa";

const mockMailer = new EmailClient({
	defaultLang: "en",
	subjects: defaultSubjects,
	defaults: { APP_NAME: "TestApp", APP_URL: "https://test.com" },
	transporter: {
		sendMail: async (mailOptions) => ({
			messageId: `mock-${Date.now()}`,
			response: "Mock OK",
		}),
		verify: async () => true,
	},
});

async function run() {
	const subscribers = [
		"alice@example.com",
		"bob@example.com",
		"charlie@example.com",
	];
	const currentMonth = new Date().toLocaleString("en-US", { month: "long" });
	const currentYear = new Date().getFullYear();

	const results = [];
	for (const email of subscribers) {
		const { html, subject } = mockMailer.compileMail(
			"newsletter-promotion",
			{
				lang: "en",
				variables: {
					MONTH: currentMonth,
					YEAR: currentYear,
					PROMO_CODE: "NEWSLETTER20",
					PROMO_DISCOUNT: "20%",
					PROMO_EXPIRY: "end of month",
				},
			},
		);
		const res = await mockMailer.sendMail({ to: email, html, subject });
		results.push({ user: email, success: true, result: res });
	}

	console.log("Newsletter campaign results:", results);
}

run();