hn-points.js

addEventListener("fetch", event => {
  event.respondWith(handleRequest(event.request))
})

function jsonResponse(o) {
  return new Response(JSON.stringify(o), {
    headers: {
      "content-type": "application/json;charset=UTF-8",
      'Access-Control-Allow-Origin': '*',
    }
  })
}

async function queryHNPoints(link) {
  const url = new URL('https://hn.algolia.com/api/v1/search')
  url.searchParams.append('query', link)
  const resp = await fetch(url).then(r => r.json())
  let total = 0
  for (const h of resp.hits) {
    if (!h._tags.includes('comment')) {
      total += h.points || 0
    }
  }
  return total
}

async function handleRequest(request) {
  const { searchParams } = new URL(request.url)
  const url = searchParams.get('url')
  if (!url) {
    return jsonResponse({ error: 'please query with url' })
  }
  const points = await queryHNPoints(url)
  return jsonResponse({ url, points })
}