Function buildScanExtensionSet

scan-worker.js:171–184

* Normalize extension list from main (includes ADDITIONAL_FILE_TYPES_CATALOG selections: .obj, .step, .stp, …). * Used for both directory-queue filtering and processFile / ZIP entry matching so behavior stays consistent.

(scanExtensions)

 * Used for both directory-queue filtering and processFile / ZIP entry matching so behavior stays consistent.
 */
/** macOS ZIP junk: __MACOSX folder entries and AppleDouble (._*) resource forks */
function isMacOsJunkZipEntry(entryPath) {
  if (!entryPath) return false;
  const normalized = entryPath.replace(/\\/g, '/');
  if (normalized.split('/').some((seg) => seg.toLowerCase() === '__macosx')) return true;
  const base = path.basename(entryPath);
  return base.startsWith('._');
}

function buildScanExtensionSet(scanExtensions) {
  const set = new Set();
  const add = (raw) => {
    if (raw == null || raw === '') return;
    const s = String(raw).trim().toLowerCase();
    if (!s) return;
    set.add(s.startsWith('.') ? s : `.${s}`);
  };