isIgnored.ts

const ignored = new Map<string, boolean>();

const isIgnoredItem = (driveItem: ItemWrapper): boolean => {
  if (ignored.has(driveItem.id)) {
    return ignored.get(driveItem.id);
  }
  if (ignoredList.indexOf(driveItem.id) !== -1) {
    ignored.set(driveItem.id, true);
    return true;
  }
  if (driveItem.id === rootFolderId) {
    ignored.set(driveItem.id, false);
    return false;
  }

  let parents = driveItem.content.getParents();
  if (!parents.hasNext()) {
    ignored.set(driveItem.id, false);
    return false;
  }
  while (parents.hasNext()) {
    // 全ての親がignoredならtrue
    const parent = parents.next();
    const parentWrapper = { content: parent, id: parent.getId() };
    if (!isIgnoredItem(parentWrapper)) {
      ignored.set(driveItem.id, false);
      return false;
    }
  }
  ignored.set(driveItem.id, true);
  return true;
};