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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.
*/
#include "facade.h"
#include <QDebug>
#include <functional>
#include "common/resourceaccess.h"
#include "common/commands.h"
#include "dummycalendar_generated.h"
#include "event_generated.h"
#include "entity_generated.h"
#include "metadata_generated.h"
#include "createentity_generated.h"
#include "domainadaptor.h"
#include <common/entitybuffer.h>
using namespace DummyCalendar;
using namespace flatbuffers;
DummyResourceFacade::DummyResourceFacade()
: Akonadi2::StoreFacade<Akonadi2::Domain::Event>(),
mResourceAccess(new Akonadi2::ResourceAccess("org.kde.dummy")),
mFactory(new DummyEventAdaptorFactory)
{
}
DummyResourceFacade::~DummyResourceFacade()
{
}
Async::Job<void> DummyResourceFacade::create(const Akonadi2::Domain::Event &domainObject)
{
//Create message buffer and send to resource
flatbuffers::FlatBufferBuilder eventFbb;
eventFbb.Clear();
{
auto summary = eventFbb.CreateString("summary");
// auto data = fbb.CreateUninitializedVector<uint8_t>(attachmentSize);
DummyCalendar::DummyEventBuilder eventBuilder(eventFbb);
eventBuilder.add_summary(summary);
auto eventLocation = eventBuilder.Finish();
DummyCalendar::FinishDummyEventBuffer(eventFbb, eventLocation);
// memcpy((void*)DummyCalendar::GetDummyEvent(fbb.GetBufferPointer())->attachment()->Data(), rawData, attachmentSize);
}
flatbuffers::FlatBufferBuilder entityFbb;
Akonadi2::EntityBuffer::assembleEntityBuffer(entityFbb, 0, 0, eventFbb.GetBufferPointer(), eventFbb.GetSize(), 0, 0);
flatbuffers::FlatBufferBuilder fbb;
//This is the resource type and not the domain type
auto type = fbb.CreateString("event");
auto delta = fbb.CreateVector<uint8_t>(entityFbb.GetBufferPointer(), entityFbb.GetSize());
Akonadi2::Commands::CreateEntityBuilder builder(fbb);
builder.add_domainType(type);
builder.add_delta(delta);
auto location = builder.Finish();
Akonadi2::Commands::FinishCreateEntityBuffer(fbb, location);
mResourceAccess->open();
return mResourceAccess->sendCommand(Akonadi2::Commands::CreateEntityCommand, fbb);
}
Async::Job<void> DummyResourceFacade::modify(const Akonadi2::Domain::Event &domainObject)
{
//Create message buffer and send to resource
return Async::null<void>();
}
Async::Job<void> DummyResourceFacade::remove(const Akonadi2::Domain::Event &domainObject)
{
//Create message buffer and send to resource
return Async::null<void>();
}
static std::function<bool(const std::string &key, DummyEvent const *buffer)> prepareQuery(const Akonadi2::Query &query)
{
//Compose some functions to make query matching fast.
//This way we can process the query once, and convert all values into something that can be compared quickly
std::function<bool(const std::string &key, DummyEvent const *buffer)> preparedQuery;
if (!query.ids.isEmpty()) {
//Match by id
//TODO: for id's a direct lookup would be way faster
//We convert the id's to std::string so we don't have to convert each key during the scan. (This runs only once, and the query will be run for every key)
//Probably a premature optimization, but perhaps a useful technique to be investigated.
QVector<std::string> ids;
for (const auto &id : query.ids) {
ids << id.toStdString();
}
preparedQuery = [ids](const std::string &key, DummyEvent const *buffer) {
if (ids.contains(key)) {
return true;
}
return false;
};
} else {
//Match everything
preparedQuery = [](const std::string &key, DummyEvent const *buffer) {
return true;
};
}
return preparedQuery;
}
Async::Job<void> DummyResourceFacade::synchronizeResource(bool sync)
{
//TODO check if a sync is necessary
//TODO Only sync what was requested
//TODO timeout
if (sync) {
return Async::start<void>([=](Async::Future<void> &future) {
mResourceAccess->open();
mResourceAccess->synchronizeResource().then<void>([&future](Async::Future<void> &f) {
future.setFinished();
f.setFinished();
}).exec();
});
}
return Async::null<void>();
}
Async::Job<void> DummyResourceFacade::load(const Akonadi2::Query &query, const std::function<void(const Akonadi2::Domain::Event::Ptr &)> &resultCallback)
{
qDebug() << "load called";
return synchronizeResource(query.syncOnDemand).then<void>([=](Async::Future<void> &future) {
qDebug() << "sync complete";
//Now that the sync is complete we can execute the query
const auto preparedQuery = prepareQuery(query);
auto storage = QSharedPointer<Akonadi2::Storage>::create(Akonadi2::Store::storageLocation(), "org.kde.dummy");
qDebug() << "executing query";
//We start a transaction explicitly that we'll leave open so the values can be read.
//The transaction will be closed automatically once the storage object is destroyed.
storage->startTransaction(Akonadi2::Storage::ReadOnly);
//Because we have no indexes yet, we always do a full scan
storage->scan("", [=](void *keyValue, int keySize, void *dataValue, int dataSize) -> bool {
//Skip internals
if (QByteArray::fromRawData(static_cast<char*>(keyValue), keySize).startsWith("__internal")) {
return true;
}
//Extract buffers
Akonadi2::EntityBuffer buffer(dataValue, dataSize);
DummyEvent const *resourceBuffer = 0;
if (auto resourceData = buffer.entity().resource()) {
flatbuffers::Verifier verifyer(resourceData->Data(), resourceData->size());
if (VerifyDummyEventBuffer(verifyer)) {
resourceBuffer = GetDummyEvent(resourceData);
}
}
Akonadi2::Metadata const *metadataBuffer = 0;
if (auto metadataData = buffer.entity().metadata()) {
flatbuffers::Verifier verifyer(metadataData->Data(), metadataData->size());
if (Akonadi2::VerifyMetadataBuffer(verifyer)) {
metadataBuffer = Akonadi2::GetMetadata(metadataData);
}
}
if (!resourceBuffer || !metadataBuffer) {
qWarning() << "invalid buffer " << QString::fromStdString(std::string(static_cast<char*>(keyValue), keySize));
return true;
}
//We probably only want to create all buffers after the scan
//TODO use adapter for query and scan?
if (preparedQuery && preparedQuery(std::string(static_cast<char*>(keyValue), keySize), resourceBuffer)) {
qint64 revision = metadataBuffer ? metadataBuffer->revision() : -1;
auto adaptor = mFactory->createAdaptor(buffer.entity());
//TODO only copy requested properties
auto memoryAdaptor = QSharedPointer<Akonadi2::Domain::MemoryBufferAdaptor>::create(*adaptor);
auto event = QSharedPointer<Akonadi2::Domain::Event>::create("org.kde.dummy", QString::fromUtf8(static_cast<char*>(keyValue), keySize), revision, memoryAdaptor);
resultCallback(event);
}
return true;
});
future.setFinished();
});
}
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