LINE Theme をダウンロードするやつ

line-theme.js

javascript: (async function () {
  function validateThemeIdFormat(id) {
    return /^[-a-z0-9]{6,}$/.test(id);
  }
  function buildThemeZipUri(id, version, platform) {
    const subdir1 = id.substring(0, 2);
    const subdir2 = id.substring(2, 4);
    const subdir3 = id.substring(4, 6);
    const baseuri = "https://stickershop.line-scdn.net/themeshop/v1/products";
    return `${baseuri}/${subdir1}/${subdir2}/${subdir3}/${id}/${version}/${platform}/theme.zip`;
  }
  function downloadThemeZip(id, version, platform) {
    const uri = buildThemeZipUri(id, version, platform);
    const link = document.createElement("a");
    console.table({ id, version, platform, uri });
    link.href = uri;
    link.download = `Theme-${id}-${version}-${platform}.zip`;
    link.dispatchEvent(new MouseEvent("click"));
  }
  function getThemeIdFromUrl() {
    const url = window.location.href;
    const match = url.match(/\/themeshop\/product\/([-a-z0-9]{6,})\//);
    return match ? match[1] : null;
  }
  const id = getThemeIdFromUrl();
  if (!id || !validateThemeIdFormat(id)) {
    alert("Invalid or missing package ID in URL");
    return;
  }
  const ogImageMeta = document.querySelector('meta[property="og:image"]');
  if (!ogImageMeta) {
    alert("No og:image meta tag found");
    return;
  }
  const ogImageUrl = ogImageMeta.getAttribute("content");
  const versionMatch = ogImageUrl.match(/\/(\d+)\/WEBSTORE\//);
  if (!versionMatch) {
    alert("Version number not found in og:image URL");
    return;
  }
  const version = versionMatch[1];
  const platforms = ["ANDROID", "IOS"];
  for (const platform of platforms) {
    downloadThemeZip(id, version, platform);
    await new Promise((r) => setTimeout(r, 1000));
  }
})();