import { parse } from "node-html-parser";

const BASE_URL =
  "https://www.nasa.gov/gallery/human-spaceflight-mission-patches/";

async function getPatchHrefs() {
  function getGalleryPageHref(page: number) {
    if (page > 1) {
      return `${BASE_URL}page/${page}/`;
    } else {
      return BASE_URL;
    }
  }

  [...Array(7).keys()]
    .map((val) => ++val)
    .map(async (page) => {
      const req = await fetch(getGalleryPageHref(page));
      const data = parse(await req.text());

      const gallery = data
        .getElementsByTagName("div")
        .filter((el) => el.classList.contains("hds-gallery-items"))
        .shift();

      return gallery
        ?.getElementsByTagName("a")
        .map((el) => el.getAttribute("href"))
        .filter((el) => el) as string[];
    });
}

const allPatches = await getPatchHrefs();

console.log(allPatches);