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/*
* Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
*
* 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) version 3, or any
* later version accepted by the membership of KDE e.V. (or its
* successor approved by the membership of KDE e.V.), which shall
* act as a proxy defined in Section 6 of version 3 of the license.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#pragma once
#include <QString>
#include <QSharedPointer>
#include <QEventLoop>
#include <functional>
#include <memory>
#include <Async/Async>
#include "query.h"
#include "resultprovider.h"
#include "applicationdomaintype.h"
#include "facadefactory.h"
#include "log.h"
namespace async {
//This should abstract if we execute from eventloop or in thread.
//It supposed to allow the caller to finish the current method before executing the runner.
void run(const std::function<void()> &runner);
}
namespace Akonadi2 {
using namespace async;
/**
* Store interface used in the client API.
*/
class Store {
private:
static QList<QByteArray> getResources(const QList<QByteArray> &resourceFilter, const QByteArray &type);
public:
static QString storageLocation();
static QByteArray resourceName(const QByteArray &instanceIdentifier);
/**
* Asynchronusly load a dataset
*/
template <class DomainType>
static QSharedPointer<ResultEmitter<typename DomainType::Ptr> > load(Query query)
{
auto resultSet = QSharedPointer<ResultProvider<typename DomainType::Ptr> >::create();
//Execute the search in a thread.
//We must guarantee that the emitter is returned before the first result is emitted.
//The result provider must be threadsafe.
async::run([query, resultSet](){
QEventLoop eventLoop;
resultSet->onDone([&eventLoop](){
eventLoop.quit();
});
// Query all resources and aggregate results
KAsync::iterate(getResources(query.resources, ApplicationDomain::getTypeName<DomainType>()))
.template each<void, QByteArray>([query, resultSet](const QByteArray &resource, KAsync::Future<void> &future) {
auto facade = FacadeFactory::instance().getFacade<DomainType>(resourceName(resource), resource);
if (facade) {
facade->load(query, resultSet).template then<void>([&future](){future.setFinished();}).exec();
//Keep the facade alive for the lifetime of the resultSet.
resultSet->setFacade(facade);
} else {
//Ignore the error and carry on
future.setFinished();
}
}).template then<void>([query, resultSet]() {
resultSet->initialResultSetComplete();
if (!query.liveQuery) {
resultSet->complete();
}
}).exec();
//Keep the thread alive until the result is ready
if (!resultSet->isDone()) {
eventLoop.exec();
}
});
return resultSet->emitter();
}
/**
* Asynchronusly load a dataset with tree structure information
*/
// template <class DomainType>
// static TreeSet<DomainType> loadTree(Query)
// {
// }
template <class DomainType>
static std::shared_ptr<StoreFacade<DomainType> > getFacade(const QByteArray &resourceInstanceIdentifier)
{
if (auto facade = FacadeFactory::instance().getFacade<DomainType>(resourceName(resourceInstanceIdentifier), resourceInstanceIdentifier)) {
return facade;
}
return std::make_shared<NullFacade<DomainType> >();
}
/**
* Create a new entity.
*/
template <class DomainType>
static KAsync::Job<void> create(const DomainType &domainObject) {
//Potentially move to separate thread as well
auto facade = getFacade<DomainType>(domainObject.resourceInstanceIdentifier());
return facade->create(domainObject).template then<void>([facade](){}, [](int errorCode, const QString &error) {
Warning() << "Failed to create";
});
}
/**
* Modify an entity.
*
* This includes moving etc. since these are also simple settings on a property.
*/
template <class DomainType>
static KAsync::Job<void> modify(const DomainType &domainObject) {
//Potentially move to separate thread as well
auto facade = getFacade<DomainType>(domainObject.resourceInstanceIdentifier());
return facade->modify(domainObject).template then<void>([facade](){}, [](int errorCode, const QString &error) {
Warning() << "Failed to modify";
});
}
/**
* Remove an entity.
*/
template <class DomainType>
static KAsync::Job<void> remove(const DomainType &domainObject) {
//Potentially move to separate thread as well
auto facade = getFacade<DomainType>(domainObject.resourceInstanceIdentifier());
return facade->remove(domainObject).template then<void>([facade](){}, [](int errorCode, const QString &error) {
Warning() << "Failed to remove";
});
}
/**
* Shutdown resource.
*/
static KAsync::Job<void> shutdown(const QByteArray &resourceIdentifier);
/**
* Synchronize data to local cache.
*/
static KAsync::Job<void> synchronize(const Akonadi2::Query &query);
};
}
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