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path: root/packages/backend/src/services/send-email.ts
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import * as nodemailer from 'nodemailer';
import { fetchMeta } from '@/misc/fetch-meta.js';
import Logger from './logger.js';
import config from '@/config/index.js';

export const logger = new Logger('email');

export async function sendEmail(to: string, subject: string, html: string, text: string) {
	const meta = await fetchMeta(true);

	const iconUrl = `${config.url}/static-assets/mi-white.png`;
	const emailSettingUrl = `${config.url}/settings/email`;

	const enableAuth = meta.smtpUser != null && meta.smtpUser !== '';

	const transporter = nodemailer.createTransport({
		host: meta.smtpHost,
		port: meta.smtpPort,
		secure: meta.smtpSecure,
		ignoreTLS: !enableAuth,
		proxy: config.proxySmtp,
		auth: enableAuth ? {
			user: meta.smtpUser,
			pass: meta.smtpPass,
		} : undefined,
	} as any);

	try {
		// TODO: htmlサニタイズ
		const info = await transporter.sendMail({
			from: meta.email!,
			to: to,
			subject: subject,
			text: text,
			html: `<!doctype html>
<html>
	<head>
		<meta charset="utf-8">
		<title>${ subject }</title>
		<style>
			html {
				background: #eee;
			}

			body {
				padding: 16px;
				margin: 0;
				font-family: sans-serif;
				font-size: 14px;
			}

			a {
				text-decoration: none;
				color: #86b300;
			}
			a:hover {
				text-decoration: underline;
			}

			main {
				max-width: 500px;
				margin: 0 auto;
				background: #fff;
				color: #555;
			}
				main > header {
					padding: 32px;
					background: #86b300;
				}
					main > header > img {
						max-width: 128px;
						max-height: 28px;
						vertical-align: bottom;
					}
				main > article {
					padding: 32px;
				}
					main > article > h1 {
						margin: 0 0 1em 0;
					}
				main > footer {
					padding: 32px;
					border-top: solid 1px #eee;
				}

			nav {
				box-sizing: border-box;
				max-width: 500px;
				margin: 16px auto 0 auto;
				padding: 0 32px;
			}
				nav > a {
					color: #888;
				}
		</style>
	</head>
	<body>
		<main>
			<header>
				<img src="${ meta.logoImageUrl || meta.iconUrl || iconUrl }"/>
			</header>
			<article>
				<h1>${ subject }</h1>
				<div>${ html }</div>
			</article>
			<footer>
				<a href="${ emailSettingUrl }">${ 'Email setting' }</a>
			</footer>
		</main>
		<nav>
			<a href="${ config.url }">${ config.host }</a>
		</nav>
	</body>
</html>`,
		});

		logger.info(`Message sent: ${info.messageId}`);
	} catch (err) {
		logger.error(err as Error);
		throw err;
	}
}