Search with isolate backend

search_with_isolate_backend.dart

/// Handler for event [Events.cacheItems]
void _cacheItems() {
  _notFilteredItems.clear();
  final List<Item> multipliedItems = [];
  for (int i = 0; i < 10; i++) {
    multipliedItems.addAll(_items);
  }
  _notFilteredItems.addAll(multipliedItems);
  send(Events.cacheItems);
}

/// For each event [Events.startSearch] this method is called,
/// filtering elements and sending the filtered to the light state
void _filterItems(String searchValue) {
  if (searchValue.isEmpty) {
    _items.clear();
    _items.addAll(_notFilteredItems);
    send(ThirdEvents.setFilteredItems, _items);
    return;
  }
  final List<Item> filteredItems = filterItems(Packet2(_notFilteredItems, searchValue));
  _items.clear();
  _items.addAll(filteredItems);
  send(Events.setFilteredItems, _items);
}