cf_noteworthy_dink_kc.js

export default {
  async fetch(request, env, ctx) {
    if (!isValidAgent(request.headers.get("User-Agent"))) {
      return new Response();
    }

    const form = await request.formData();
    const payload = JSON.parse(form.get("payload_json"));
    const extra = payload.extra;

    if (payload.type === "KILL_COUNT" && isNoteworthyKc(extra.boss, extra.count, extra.isPersonalBest)) {
      return Response.redirect("https://discord.com/api/webhooks/redacted/redacted", 307);
    }

    return new Response();
  },
};

function isNoteworthyKc(boss, kc, pb) {
  if (pb || kc === 1) return true;
  if (boss === "TzKal-Zuk") return kc % 5 === 0;
  if (boss === "Sol Heredit") return kc % 25 === 0;
  return kc % 100 === 0;
}

function isValidAgent(ua) {
  if (typeof ua !== "string") return false;
  if (!ua.startsWith("RuneLite/") && !ua.startsWith("HDOS/")) return false;
  return ua.includes("Dink/");
}