misskey/packages/backend/src/services/send-email-notification.ts

import { UserProfiles } from '@/models/index';
import { User } from '@/models/entities/user';
import { sendEmail } from './send-email';
import { I18n } from '@/misc/i18n';
import * as Acct from 'misskey-js/built/acct';
const locales = require('../../../../locales/index.js');

// TODO: locale ファイルをクライアント用とサーバー用で分けたい

async function follow(userId: User['id'], follower: User) {
	const userProfile = await UserProfiles.findOneOrFail({ userId: userId });
	if (!userProfile.email || !userProfile.emailNotificationTypes.includes('follow')) return;
	const locale = locales[userProfile.lang || 'ja-JP'];
	const i18n = new I18n(locale);
	// TODO: render user information html
	sendEmail(userProfile.email, i18n.t('_email._follow.title'), `${follower.name} (@${Acct.toString(follower)})`, `${follower.name} (@${Acct.toString(follower)})`);
}

async function receiveFollowRequest(userId: User['id'], follower: User) {
	const userProfile = await UserProfiles.findOneOrFail({ userId: userId });
	if (!userProfile.email || !userProfile.emailNotificationTypes.includes('receiveFollowRequest')) return;
	const locale = locales[userProfile.lang || 'ja-JP'];
	const i18n = new I18n(locale);
	// TODO: render user information html
	sendEmail(userProfile.email, i18n.t('_email._receiveFollowRequest.title'), `${follower.name} (@${Acct.toString(follower)})`, `${follower.name} (@${Acct.toString(follower)})`);
}

export const sendEmailNotification = {
	follow,
	receiveFollowRequest,
};