composa/examples/advanced/02_bulk_sending.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) => {
			console.log(`Mock envoyé à: ${mailOptions.to}`);
			console.log(`Sujet: ${mailOptions.subject}`);
			return { messageId: `mock-${Date.now()}`, response: "Mock OK" };
		},
		verify: async () => true,
	},
});

async function run() {
	const recipients = [
		{ email: "alice@example.com", name: "Alice", lang: "en" },
		{ email: "bob@example.com", name: "Bob", lang: "en" },
	];

	const results = [];
	for (const user of recipients) {
		const { html, subject } = mockMailer.compileMail(
			"newsletter-promotion",
			{
				lang: user.lang,
				variables: { USER_NAME: user.name },
			},
		);

		const res = await mockMailer.sendMail({
			to: user.email,
			html,
			subject,
		});
		results.push({ user: user.email, success: true, result: res });
	}

	console.log("Bulk sending results:", results);
}

run();