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/*
Copyright (c) 2018 Christian Mollekopf <mollekopf@kolabsys.com>
This library is free software; you can redistribute it and/or modify it
under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2 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 Library General Public
License for more details.
You should have received a copy of the GNU Library General Public License
along with this library; see the file COPYING.LIB. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301, USA.
*/
#pragma once
#include "kube_export.h"
#include <sink/query.h>
#include <sink/store.h>
#include <QSharedPointer>
#include <QAbstractItemModel>
class KUBE_EXPORT EntityCacheInterface
{
public:
typedef QSharedPointer<EntityCacheInterface> Ptr;
EntityCacheInterface() = default;
virtual ~EntityCacheInterface() = default;
virtual QVariant getProperty(const QByteArray &identifier, const QByteArray &property) const = 0;
};
template<typename DomainType, typename Property>
class KUBE_EXPORT EntityCache : public EntityCacheInterface
{
public:
typedef QSharedPointer<EntityCache> Ptr;
EntityCache();
virtual ~EntityCache() = default;
virtual QVariant getProperty(const QByteArray &, const QByteArray &) const override;
private:
QHash<QByteArray, typename DomainType::Ptr> mCache;
QSharedPointer<QAbstractItemModel> mModel;
};
template<typename DomainType, typename Property>
EntityCache<DomainType, Property>::EntityCache()
: EntityCacheInterface()
{
Sink::Query query;
query.request<Property>();
query.setFlags(Sink::Query::LiveQuery);
mModel = Sink::Store::loadModel<DomainType>(query);
QObject::connect(mModel.data(), &QAbstractItemModel::rowsInserted, mModel.data(), [this] (const QModelIndex &, int start, int end) {
for (int row = start; row <= end; row++) {
auto entity = mModel->index(row, 0, QModelIndex()).data(Sink::Store::DomainObjectRole).template value<typename DomainType::Ptr>();
mCache.insert(entity->identifier(), entity);
}
});
}
template<typename DomainType, typename Property>
QVariant EntityCache<DomainType, Property>::getProperty(const QByteArray &identifier, const QByteArray &property) const
{
if (auto entity = mCache.value(identifier)) {
return entity->getProperty(property);
}
return {};
}
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