portfolio/lib/generateRssFeed.tsx

import ReactDOMServer from 'react-dom/server'
import {Feed} from 'feed'
import {mkdir, writeFile} from 'fs/promises'

import {getAllArticles} from './getAllArticles'

export async function generateRssFeed() {
    let articles = await getAllArticles()
    let siteUrl = process.env.NEXT_PUBLIC_SITE_URL
    let author = {
        name: 'Ryan Freeman',
        email: 'hello@ryanfreeman.dev',
    }

    let feed = new Feed({
        title: author.name,
        description: 'Hi. I\'m Ryan, a software engineer based in Dublin, Ireland. I\'m currently working in the aviation industry for Aer Lingus. I am passionate about personal growth and progressing in my career. This is my personal website where you can learn more about me, read articles Ive written and see projects I\'ve worked on.',
        author,
        id: siteUrl!,
        link: siteUrl,
        image: `${siteUrl}/favicon.ico`,
        favicon: `${siteUrl}/favicon.ico`,
        copyright: `All rights reserved ${new Date().getFullYear()}`,
        feedLinks: {
            rss2: `${siteUrl}/rss/feed.xml`,
            json: `${siteUrl}/rss/feed.json`,
        },
    })

    for (let article of articles) {
        let url = `${siteUrl}/writing/${article.slug}`;

        let html = ReactDOMServer.renderToStaticMarkup(
            <article.component isRssFeed/>
        )

        feed.addItem({
            title: article.title,
            id: url,
            link: url,
            description: article.description,
            content: html,
            author: [author],
            contributor: [author],
            date: new Date(article.date),
        })
    }

    await mkdir('./public/rss', {recursive: true})
    await Promise.all([
        writeFile('./public/rss/feed.xml', feed.rss2(), 'utf8'),
        writeFile('./public/rss/feed.json', feed.json1(), 'utf8'),
    ])
}