workavia-mail-front/lib/features/mailbox/presentation/utils/mailbox_utils.dart

import 'package:core/utils/app_logger.dart';
import 'package:dartz/dartz.dart';
import 'package:jmap_dart_client/jmap/mail/mailbox/mailbox.dart';
import 'package:model/mailbox/presentation_mailbox.dart';
import 'package:tmail_ui_user/features/mailbox/presentation/extensions/list_mailbox_node_extension.dart';
import 'package:tmail_ui_user/features/mailbox/presentation/model/mailbox_tree.dart';

class MailboxUtils {

  static Tuple2<Map<MailboxId, List<MailboxId>>, List<MailboxId>> generateMapDescendantIdsAndMailboxIdList(
      List<PresentationMailbox> selectedMailboxList,
      MailboxTree defaultMailboxTree,
      MailboxTree folderMailboxTree,
  ) {
    Map<MailboxId, List<MailboxId>> mapDescendantIds = {};
    List<MailboxId> allMailboxIds = [];

    for (var mailbox in selectedMailboxList) {
      final currentMailboxId = mailbox.id;

      if (allMailboxIds.contains(currentMailboxId)) {
        continue;
      } else {
        final matchedNode = defaultMailboxTree.findNode((node) => node.item.id == currentMailboxId)
            ?? folderMailboxTree.findNode((node) => node.item.id == currentMailboxId);

        if (matchedNode != null)  {
          final descendantIds = matchedNode.descendantsAsList().mailboxIds;
          final descendantIdsReversed = descendantIds.reversed.toList();

          mapDescendantIds[currentMailboxId] = descendantIdsReversed;
          allMailboxIds.addAll(descendantIdsReversed);
        }
      }
    }
    log('MailboxUtils::generateMapDescendantIdsAndMailboxIdList(): mapDescendantIds: $mapDescendantIds');
    return Tuple2(mapDescendantIds, allMailboxIds);
  }
}