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/*
* Copyright (C) 2014 Christian Mollekopf <chrigi_1@fastmail.fm>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the
* Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#pragma once
#include "clientapi.h"
#include <QByteArray>
#include "async/src/async.h"
#include "resourceaccess.h"
#include "commands.h"
#include "createentity_generated.h"
#include "domainadaptor.h"
#include "entitybuffer.h"
/**
* A QueryRunner runs a query and updates the corresponding result set.
*
* The lifetime of the QueryRunner is defined by the resut set (otherwise it's doing useless work),
* and by how long a result set must be updated. If the query is one off the runner dies after the execution,
* otherwise it lives on the react to changes and updates the corresponding result set.
*
* QueryRunner has to keep ResourceAccess alive in order to keep getting updates.
*/
class QueryRunner : public QObject
{
Q_OBJECT
public:
typedef std::function<Async::Job<qint64>(qint64 oldRevision, qint64 newRevision)> QueryFunction;
QueryRunner(const Akonadi2::Query &query) : mLatestRevision(0) {};
/**
* Starts query
*/
Async::Job<void> run(qint64 newRevision = 0)
{
//TODO: JOBAPI: that last empty .then should not be necessary
return queryFunction(mLatestRevision, newRevision).then<void, qint64>([this](qint64 revision) {
mLatestRevision = revision;
}).then<void>([](){});
}
/**
*
*/
void setQuery(const QueryFunction &query)
{
queryFunction = query;
}
public slots:
/**
* Rerun query with new revision
*/
void revisionChanged(qint64 newRevision)
{
run(newRevision).exec();
}
private:
QueryFunction queryFunction;
qint64 mLatestRevision;
};
namespace Akonadi2 {
class ResourceAccess;
/**
* Default facade implementation for resources that are implemented in a separate process using the ResourceAccess class.
*/
template <typename DomainType>
class GenericFacade: public Akonadi2::StoreFacade<DomainType>
{
public:
GenericFacade(const QByteArray &resourceIdentifier)
: Akonadi2::StoreFacade<DomainType>(),
mResourceAccess(new ResourceAccess(resourceIdentifier))
{
}
~GenericFacade()
{
}
protected:
Async::Job<void> sendCreateCommand(const QByteArray &t, const QByteArray &buffer)
{
flatbuffers::FlatBufferBuilder fbb;
//This is the resource buffer type and not the domain type
auto type = fbb.CreateString(t.constData());
auto delta = Akonadi2::EntityBuffer::appendAsVector(fbb, buffer.constData(), buffer.size());
auto location = Akonadi2::Commands::CreateCreateEntity(fbb, type, delta);
Akonadi2::Commands::FinishCreateEntityBuffer(fbb, location);
mResourceAccess->open();
return mResourceAccess->sendCommand(Akonadi2::Commands::CreateEntityCommand, fbb);
}
Async::Job<void> synchronizeResource(bool sync, bool processAll)
{
//TODO check if a sync is necessary
//TODO Only sync what was requested
//TODO timeout
//TODO the synchronization should normally not be necessary: We just return what is already available.
if (sync || processAll) {
return Async::start<void>([=](Async::Future<void> &future) {
mResourceAccess->open();
mResourceAccess->synchronizeResource(sync, processAll).then<void>([&future]() {
future.setFinished();
}).exec();
});
}
return Async::null<void>();
}
protected:
//TODO use one resource access instance per application => make static
QSharedPointer<Akonadi2::ResourceAccess> mResourceAccess;
};
}
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