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++ // Copyright (C) 2025 The Qt Company Ltd.
++ // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
++
++ #include "threadedlistmodel.h"
++
++ ThreadedListModel::ThreadedListModel()
++ {
++ m_idList = m_storage.idList();
++ connect(&m_storage, &DataStorage::dataUpdated, this, &ThreadedListModel::dataUpdated);
++ }
++
++ int ThreadedListModel::rowCount(const QModelIndex &parent) const
++ {
++ if (parent.isValid())
++ return 0;
++ return m_idList.size();
++ }
++
++ QVariant ThreadedListModel::data(const QModelIndex &index, int role) const
++ {
++ const auto id = m_idList.at(index.row());
++ const auto &item = m_storage.item(id);
++ if (item.isValid()) {
++ switch (static_cast<Role>(role)) {
++ case Role::Album:
++ return item.album();
++ case Role::AlbumArt:
++ return item.albumArtFile();
++ case Role::Artist:
++ return item.artist();
++ case Role::Song:
++ return item.song();
++ case Role::LoadingElement:
++ return false;
++ case Role::LoadingText:
++ return QString();
++ default:
++ break;
++ }
++ } else {
++ /* Item not fetched yet, pass "loading" item. */
++ switch (static_cast<Role>(role)) {
++ case Role::Album:
++ case Role::AlbumArt:
++ case Role::Artist:
++ case Role::Song:
++ return QString{};
++ case Role::LoadingElement:
++ return true;
++ case Role::LoadingText:
++ return m_storage.currentlyFetchedId() == id ? QString{} : tr("Waiting...");
++ default:
++ break;
++ }
++ }
++ return QVariant{};
++ }
++
++ void ThreadedListModel::dataUpdated(int id)
++ {
++ const QModelIndex changedIndex = index(m_idList.indexOf(id));
++ emit dataChanged(changedIndex, changedIndex);
++ }
++
++ QHash<int, QByteArray> ThreadedListModel::roleNames() const
++ {
++ static const QHash<int, QByteArray> roles{{static_cast<int>(Role::Song), "song"},
++ {static_cast<int>(Role::Artist), "artist"},
++ {static_cast<int>(Role::Album), "album"},
++ {static_cast<int>(Role::AlbumArt), "albumArt"},
++ {static_cast<int>(Role::LoadingText), "loadingText"},
++ {static_cast<int>(Role::LoadingElement),
++ "isLoadingElement"}};
++ return roles;
++ }