JumpListResult JumpList::AppendCategory()

in shell/browser/ui/win/jump_list.cc [225:314]
80 lines of code
22 McCabe index (conditional complexity)

JumpListResult JumpList::AppendCategory(const JumpListCategory& category) {
  DCHECK(destinations_);
  if (!destinations_)
    return JumpListResult::kGenericError;

  if (category.items.empty())
    return JumpListResult::kSuccess;

  CComPtr<IObjectCollection> collection;
  if (FAILED(collection.CoCreateInstance(CLSID_EnumerableObjectCollection))) {
    return JumpListResult::kGenericError;
  }

  auto result = JumpListResult::kSuccess;
  // Keep track of how many items were actually appended to the category.
  int appended_count = 0;
  for (const auto& item : category.items) {
    switch (item.type) {
      case JumpListItem::Type::kTask:
        if (AppendTask(item, collection))
          ++appended_count;
        else
          LOG(ERROR) << "Failed to append task '" << item.title
                     << "' "
                        "to Jump List.";
        break;

      case JumpListItem::Type::kSeparator:
        if (category.type == JumpListCategory::Type::kTasks) {
          if (AppendSeparator(collection))
            ++appended_count;
        } else {
          LOG(ERROR) << "Can't append separator to Jump List category "
                     << "'" << category.name << "'. "
                     << "Separators are only allowed in the standard 'Tasks' "
                        "Jump List category.";
          result = JumpListResult::kCustomCategorySeparatorError;
        }
        break;

      case JumpListItem::Type::kFile:
        if (AppendFile(item, collection))
          ++appended_count;
        else
          LOG(ERROR) << "Failed to append '" << item.path.value()
                     << "' "
                        "to Jump List.";
        break;
    }
  }

  if (appended_count == 0)
    return result;

  if ((static_cast<size_t>(appended_count) < category.items.size()) &&
      (result == JumpListResult::kSuccess)) {
    result = JumpListResult::kGenericError;
  }

  CComQIPtr<IObjectArray> items(collection);

  if (category.type == JumpListCategory::Type::kTasks) {
    if (FAILED(destinations_->AddUserTasks(items))) {
      LOG(ERROR) << "Failed to append items to the standard Tasks category.";
      if (result == JumpListResult::kSuccess)
        result = JumpListResult::kGenericError;
    }
  } else {
    HRESULT hr = destinations_->AppendCategory(category.name.c_str(), items);
    if (FAILED(hr)) {
      if (hr == static_cast<HRESULT>(0x80040F03)) {
        LOG(ERROR) << "Failed to append custom category "
                   << "'" << category.name << "' "
                   << "to Jump List due to missing file type registration.";
        result = JumpListResult::kMissingFileTypeRegistrationError;
      } else if (hr == E_ACCESSDENIED) {
        LOG(ERROR) << "Failed to append custom category "
                   << "'" << category.name << "' "
                   << "to Jump List due to system privacy settings.";
        result = JumpListResult::kCustomCategoryAccessDeniedError;
      } else {
        LOG(ERROR) << "Failed to append custom category "
                   << "'" << category.name << "' to Jump List.";
        if (result == JumpListResult::kSuccess)
          result = JumpListResult::kGenericError;
      }
    }
  }
  return result;
}