stacker.news/lib/rss.js

73 lines
2.4 KiB
JavaScript

import getSSRApolloClient from '../api/ssrApollo'
const SITE_URL = 'https://stacker.news'
const SITE_TITLE = 'stacker news'
const SITE_SUBTITLE = 'It\'s like Hacker News, but we pay you Bitcoin.'
function escapeXml (unsafe) {
return unsafe.replace(/[<>&'"]/g, function (c) {
switch (c) {
case '<': return '&lt;'
case '>': return '&gt;'
case '&': return '&amp;'
case '\'': return '&apos;'
case '"': return '&quot;'
}
})
}
const generateRssItem = (item) => {
const guid = `${SITE_URL}/items/${item.id}`
const link = item.url || guid
let title = item.title
if (item.isJob) {
title = item.title + ' \\ ' + item.company + ' \\ ' + `${item.location || ''}${item.location && item.remote ? ' or ' : ''}${item.remote ? 'Remote' : ''}`
}
return `
<item>
<guid>${guid}</guid>
<title>${escapeXml(title)}</title>
<link>${escapeXml(link)}</link>
<comments>${guid}</comments>
<description><![CDATA[<a href="${guid}">Comments</a>]]></description>
<pubDate>${new Date(item.createdAt).toUTCString()}</pubDate>
<atom:author><atom:name>${item.user.name}</atom:name></atom:author>
</item>
`
}
function generateRssFeed (items, sub = null) {
const itemsList = items.map(generateRssItem)
return `<?xml version="1.0" encoding="UTF-8" ?>
<rss version="2.0" xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
<title>${SITE_TITLE}${sub ? ` ~${sub}` : ''}</title>
<link>${SITE_URL}${sub ? `/~${sub}` : ''}</link>
<description>${SITE_SUBTITLE}</description>
<language>en</language>
<lastBuildDate>${new Date().toUTCString()}</lastBuildDate>
<atom:link href="${SITE_URL}/rss" rel="self" type="application/rss+xml" />
${itemsList.join('')}
</channel>
</rss>
`
}
export default function getGetRssServerSideProps (query, variables = null) {
return async function ({ req, res, query: params }) {
const emptyProps = { props: {} } // to avoid server side warnings
const client = await getSSRApolloClient(req)
const { error, data: { items: { items } } } = await client.query({
query, variables: { ...params, ...variables }
})
if (!items || error) return emptyProps
res.setHeader('Content-Type', 'text/xml; charset=utf-8')
res.write(generateRssFeed(items, params?.sub))
res.end()
return emptyProps
}
}