findDupsById method

TwoLists<CalibreWeebi<ArticleRawAbstract>> findDupsById({
  1. required List<CalibreWeebi<ArticleRawAbstract>> newList,
})

Implementation

TwoLists<CalibreWeebi> findDupsById({required List<CalibreWeebi> newList}) {
  final noDups = <CalibreWeebi>[];
  final dups = <CalibreWeebi>[];
  if (isEmpty) {
    noDups.addAll(newList);
    return TwoLists<CalibreWeebi>(dups: dups, noDups: noDups);
  }
  final oldListIds = map((e) => e.id);
  final newListIds = newList.map((e) => e.id);
  for (final newId in newListIds) {
    if (oldListIds.contains(newId)) {
      dups.add(newList.firstWhere((e) => e.id == newId));
    } else {
      noDups.add(newList.firstWhere((e) => e.id == newId));
    }
  }
  return TwoLists(noDups: noDups, dups: dups);
}