ItemListBloc searchSource - Manage lists with Flutter Bloc

item_list_bloc.dart

Iterable<I> _searchSource(String searchQuery, Iterable<I> items) {
  if (searchQuery.isEmpty) {
    return items;
  }

  // Search queries are stored lowercase, so we want to match
  // against a lowercase value as well.
  return items.where((item) => _searchProperties.any((property) {
        final value = item[property];
        return value is String
            ? value.toLowerCase().contains(searchQuery)
            : false;
      }));
}