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/*
* Copyright (C) 2016 Christian Mollekopf <mollekopf@kolabsys.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) 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/>.
*/
#include "sourcewriteback.h"
#include "definitions.h"
#include "log.h"
#include "bufferutils.h"
#include "entitybuffer.h"
#include "entity_generated.h"
#define ENTITY_TYPE_MAIL "mail"
#define ENTITY_TYPE_FOLDER "folder"
SINK_DEBUG_AREA("sourcewriteback")
using namespace Sink;
SourceWriteBack::SourceWriteBack(const ResourceContext &context)
: ChangeReplay(context),
mResourceContext(context),
mSyncStorage(Sink::storageLocation(), context.instanceId() + ".synchronization", Sink::Storage::DataStore::ReadWrite),
mEntityStore(QSharedPointer<Storage::EntityStore>::create(mResourceContext))
{
}
EntityStore &SourceWriteBack::store()
{
if (!mEntityStoreWrapper) {
mEntityStoreWrapper = QSharedPointer<EntityStore>::create(*mEntityStore);
}
return *mEntityStoreWrapper;
}
RemoteIdMap &SourceWriteBack::syncStore()
{
if (!mSyncStore) {
mSyncStore = QSharedPointer<RemoteIdMap>::create(mSyncTransaction);
}
return *mSyncStore;
}
bool SourceWriteBack::canReplay(const QByteArray &type, const QByteArray &key, const QByteArray &value)
{
Sink::EntityBuffer buffer(value);
const Sink::Entity &entity = buffer.entity();
const auto metadataBuffer = Sink::EntityBuffer::readBuffer<Sink::Metadata>(entity.metadata());
Q_ASSERT(metadataBuffer);
if (!metadataBuffer->replayToSource()) {
SinkTrace() << "Change is coming from the source";
}
return metadataBuffer->replayToSource();
}
KAsync::Job<void> SourceWriteBack::replay(const QByteArray &type, const QByteArray &key, const QByteArray &value)
{
SinkTrace() << "Replaying" << type << key;
Sink::EntityBuffer buffer(value);
const Sink::Entity &entity = buffer.entity();
const auto metadataBuffer = Sink::EntityBuffer::readBuffer<Sink::Metadata>(entity.metadata());
Q_ASSERT(metadataBuffer);
Q_ASSERT(!mSyncStore);
Q_ASSERT(!mEntityStoreWrapper);
Q_ASSERT(!mSyncTransaction);
mEntityStore->startTransaction(Storage::DataStore::ReadOnly);
mSyncTransaction = mSyncStorage.createTransaction(Sink::Storage::DataStore::ReadWrite);
// const qint64 revision = metadataBuffer ? metadataBuffer->revision() : -1;
const auto operation = metadataBuffer ? metadataBuffer->operation() : Sink::Operation_Creation;
const auto uid = Sink::Storage::DataStore::uidFromKey(key);
const auto modifiedProperties = metadataBuffer->modifiedProperties() ? BufferUtils::fromVector(*metadataBuffer->modifiedProperties()) : QByteArrayList();
QByteArray oldRemoteId;
if (operation != Sink::Operation_Creation) {
oldRemoteId = syncStore().resolveLocalId(type, uid);
if (oldRemoteId.isEmpty()) {
SinkWarning() << "Couldn't find the remote id for: " << type << uid;
return KAsync::error<void>(1, "Couldn't find the remote id.");
}
}
SinkTrace() << "Replaying " << key << type << uid << oldRemoteId;
KAsync::Job<QByteArray> job = KAsync::null<QByteArray>();
if (type == ENTITY_TYPE_FOLDER) {
auto folder = store().readFromKey<ApplicationDomain::Folder>(key);
job = replay(folder, operation, oldRemoteId, modifiedProperties);
} else if (type == ENTITY_TYPE_MAIL) {
auto mail = store().readFromKey<ApplicationDomain::Mail>(key);
job = replay(mail, operation, oldRemoteId, modifiedProperties);
}
return job.syncThen<void, QByteArray>([this, operation, type, uid, oldRemoteId](const QByteArray &remoteId) {
if (operation == Sink::Operation_Creation) {
SinkTrace() << "Replayed creation with remote id: " << remoteId;
if (remoteId.isEmpty()) {
SinkWarning() << "Returned an empty remoteId from the creation";
} else {
syncStore().recordRemoteId(type, uid, remoteId);
}
} else if (operation == Sink::Operation_Modification) {
SinkTrace() << "Replayed modification with remote id: " << remoteId;
if (remoteId.isEmpty()) {
SinkWarning() << "Returned an empty remoteId from the creation";
} else {
syncStore().updateRemoteId(type, uid, remoteId);
}
} else if (operation == Sink::Operation_Removal) {
SinkTrace() << "Replayed removal with remote id: " << oldRemoteId;
syncStore().removeRemoteId(type, uid, oldRemoteId);
} else {
SinkError() << "Unkown operation" << operation;
}
})
.syncThen<void>([this](const KAsync::Error &error) {
if (error) {
SinkWarning() << "Failed to replay change: " << error.errorMessage;
}
mSyncStore.clear();
mEntityStoreWrapper.clear();
mSyncTransaction.commit();
mEntityStore->abortTransaction();
});
}
KAsync::Job<QByteArray> SourceWriteBack::replay(const ApplicationDomain::Mail &, Sink::Operation, const QByteArray &, const QList<QByteArray> &)
{
return KAsync::null<QByteArray>();
}
KAsync::Job<QByteArray> SourceWriteBack::replay(const ApplicationDomain::Folder &, Sink::Operation, const QByteArray &, const QList<QByteArray> &)
{
return KAsync::null<QByteArray>();
}
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