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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 "synchronizerstore.h"
#include <QUuid>
#include "index.h"
#include "log.h"
using namespace Sink;
SINK_DEBUG_AREA("synchronizerstore")
SynchronizerStore::SynchronizerStore(Sink::Storage::DataStore::Transaction &transaction)
: mTransaction(transaction)
{
}
void SynchronizerStore::recordRemoteId(const QByteArray &bufferType, const QByteArray &localId, const QByteArray &remoteId)
{
Index("rid.mapping." + bufferType, mTransaction).add(remoteId, localId);
Index("localid.mapping." + bufferType, mTransaction).add(localId, remoteId);
}
void SynchronizerStore::removeRemoteId(const QByteArray &bufferType, const QByteArray &localId, const QByteArray &remoteId)
{
Index("rid.mapping." + bufferType, mTransaction).remove(remoteId, localId);
Index("localid.mapping." + bufferType, mTransaction).remove(localId, remoteId);
}
void SynchronizerStore::updateRemoteId(const QByteArray &bufferType, const QByteArray &localId, const QByteArray &remoteId)
{
const auto oldRemoteId = Index("localid.mapping." + bufferType, mTransaction).lookup(localId);
removeRemoteId(bufferType, localId, oldRemoteId);
recordRemoteId(bufferType, localId, remoteId);
}
QByteArray SynchronizerStore::resolveRemoteId(const QByteArray &bufferType, const QByteArray &remoteId)
{
if (remoteId.isEmpty()) {
SinkWarning() << "Cannot resolve empty remote id for type: " << bufferType;
return QByteArray();
}
// Lookup local id for remote id, or insert a new pair otherwise
Index index("rid.mapping." + bufferType, mTransaction);
QByteArray sinkId = index.lookup(remoteId);
if (sinkId.isEmpty()) {
sinkId = Sink::Storage::DataStore::generateUid();
index.add(remoteId, sinkId);
Index("localid.mapping." + bufferType, mTransaction).add(sinkId, remoteId);
}
return sinkId;
}
QByteArray SynchronizerStore::resolveLocalId(const QByteArray &bufferType, const QByteArray &localId)
{
QByteArray remoteId = Index("localid.mapping." + bufferType, mTransaction).lookup(localId);
if (remoteId.isEmpty()) {
//This can happen if we didn't store the remote id in the first place
SinkTrace() << "Couldn't find the remote id for " << bufferType << localId;
return QByteArray();
}
return remoteId;
}
QByteArrayList SynchronizerStore::resolveLocalIds(const QByteArray &bufferType, const QByteArrayList &localIds)
{
QByteArrayList result;
for (const auto &l : localIds) {
result << resolveLocalId(bufferType, l);
}
return result;
}
QByteArray SynchronizerStore::readValue(const QByteArray &key)
{
QByteArray value;
mTransaction.openDatabase("values").scan(key, [&value](const QByteArray &, const QByteArray &v) {
value = v;
return false;
}, [](const Sink::Storage::DataStore::Error &) {
//Ignore errors because we may not find the value
});
return value;
}
QByteArray SynchronizerStore::readValue(const QByteArray &prefix, const QByteArray &key)
{
return readValue(prefix + key);
}
void SynchronizerStore::writeValue(const QByteArray &key, const QByteArray &value)
{
mTransaction.openDatabase("values").write(key, value);
}
void SynchronizerStore::writeValue(const QByteArray &prefix, const QByteArray &key, const QByteArray &value)
{
writeValue(prefix + key, value);
}
void SynchronizerStore::removeValue(const QByteArray &prefix, const QByteArray &key)
{
auto assembled = prefix + key;
if (assembled.isEmpty()) {
return;
}
mTransaction.openDatabase("values").remove(assembled, [&](const Sink::Storage::DataStore::Error &error) {
SinkWarning() << "Failed to remove the value: " << prefix + key << error;
});
}
void SynchronizerStore::removePrefix(const QByteArray &prefix)
{
if (prefix.isEmpty()) {
return;
}
//FIXME remove all values matching prefix
// mTransaction.openDatabase("values").remove(prefix, [](const Sink::Storage::DataStore::Error &) {
// //Ignore errors because we may not find the value
// });
}
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