/*
 * Copyright (C) 2013 - 2015  Hong Jen Yee (PCMan) <pcman.tw@gmail.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

#include "cachedfoldermodel.h"

namespace Fm {

CachedFolderModel::CachedFolderModel(const std::shared_ptr<Fm::Folder>& folder):
    FolderModel(),
    refCount(1) {
    FolderModel::setFolder(folder);
}

CachedFolderModel::~CachedFolderModel() {
    // qDebug("delete CachedFolderModel");
}

CachedFolderModel* CachedFolderModel::modelFromFolder(const std::shared_ptr<Fm::Folder>& folder) {
    QVariant cache = folder->property(cacheKey);
    CachedFolderModel* model = cache.value<CachedFolderModel*>();
    if(model) {
        model->ref();
    }
    else {
        model = new CachedFolderModel(folder);
        cache = QVariant::fromValue(model);
        folder->setProperty(cacheKey, cache);
    }
    return model;
}

CachedFolderModel* CachedFolderModel::modelFromPath(const Fm::FilePath& path) {
    auto folder = Fm::Folder::fromPath(path);
    if(folder) {
        CachedFolderModel* model = modelFromFolder(folder);
        return model;
    }
    return nullptr;
}

void CachedFolderModel::unref() {
    // qDebug("unref cache");
    --refCount;
    if(refCount <= 0) {
        folder()->setProperty(cacheKey, QVariant());
        deleteLater();
    }
}


} // namespace Fm