Method applyUpdates

launcher/minecraft/mod/ResourceFolderModel.h:237–332

/* Template definition to avoid some code duplication */
template <typename T>
void ResourceFolderModel::applyUpdates(QSet<QString>& current_set, QSet<QString>& new_set, QMap<QString, T>& new_resources)
{
    // see if the kept resources changed in some way
    {
        QSet<QString> kept_set = current_set;
        kept_set.intersect(new_set);

        for (auto const& kept : kept_set) {
            auto row_it = m_resources_index.constFind(kept);
            Q_ASSERT(row_it != m_resources_index.constEnd());
            auto row = row_it.value();

            auto& new_resource = new_resources[kept];
            auto const& current_resource = m_resources.at(row);

            if (new_resource->dateTimeChanged() == current_resource->dateTimeChanged()) {
                // no significant change, ignore...
                continue;
            }

            // If the resource is resolving, but something about it changed, we don't want to
            // continue the resolving.
            if (current_resource->isResolving()) {
                auto ticket = current_resource->resolutionTicket();
                if (m_active_parse_tasks.contains(ticket)) {
                    auto task = (*m_active_parse_tasks.find(ticket)).get();
                    task->abort();
                }
            }

            m_resources[row].reset(new_resource);
            resolveResource(m_resources.at(row).get());
            emit dataChanged(index(row, 0), index(row, columnCount(QModelIndex()) - 1));
        }
    }

    // remove resources no longer present
    {
        QSet<QString> removed_set = current_set;
        removed_set.subtract(new_set);

        QList<int> removed_rows;
        for (auto& removed : removed_set)
            removed_rows.append(m_resources_index[removed]);

        std::sort(removed_rows.begin(), removed_rows.end(), std::greater<int>());

        for (auto& removed_index : removed_rows) {
            auto removed_it = m_resources.begin() + removed_index;

            Q_ASSERT(removed_it != m_resources.end());
            Q_ASSERT(removed_set.contains(removed_it->get()->internal_id()));

            if ((*removed_it)->isResolving()) {
                auto ticket = (*removed_it)->resolutionTicket();
                if (m_active_parse_tasks.contains(ticket)) {
                    auto task = (*m_active_parse_tasks.find(ticket)).get();
                    task->abort();