addOrUpdateEmit method

@override void addOrUpdateEmit(T item, { int index = 0, })

Adds or updates an item in the list.

Implementation

@override
void addOrUpdateEmit(T item, {int index = 0}) {
  final currentState = state;
  if (currentState is! SmartPaginationLoaded<T>) return;

  final updated = List<T>.from(currentState.allItems);
  final existingIndex = updated.indexWhere((element) => element == item);

  if (existingIndex != -1) {
    // Update existing item - if sorting is active, may need to reposition
    final order = _orders?.activeOrder;
    if (order != null) {
      // Remove and re-insert at correct sorted position
      updated.removeAt(existingIndex);
      final newIndex = _findSortedInsertIndex(updated, item, fallbackIndex: existingIndex);
      updated.insert(newIndex, item);
    } else {
      // No sorting, just update in place
      updated[existingIndex] = item;
    }
  } else {
    // New item - use sorted insertion if sorting is active
    final insertIndex = _findSortedInsertIndex(updated, item, fallbackIndex: index);
    updated.insert(insertIndex, item);
  }

  _onInsertionCallback?.call(updated);

  _refreshDataAge();
  emit(
    currentState.copyWith(
      allItems: updated,
      items: updated,
      lastUpdate: DateTime.now(),
      fetchedAt: _lastFetchTime,
      dataExpiredAt: _getDataExpiredAt(),
    ),
  );
}