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/*
Copyright (C) 2014 Sebastian Herbord. All rights reserved.
This file is part of Mod Organizer.
Mod Organizer 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 3 of the License, or
(at your option) any later version.
Mod Organizer 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 Mod Organizer. If not, see <http://www.gnu.org/licenses/>.
*/
#include "safewritefile.h"
#include <QStringList>
#include <QCryptographicHash>
using namespace MOBase;
SafeWriteFile::SafeWriteFile(const QString &fileName)
: m_FileName(fileName)
{
if (!m_TempFile.open()) {
throw MyException(QObject::tr("failed to open temporary file"));
}
}
QFile *SafeWriteFile::operator->() {
Q_ASSERT(m_TempFile.isOpen());
return &m_TempFile;
}
void SafeWriteFile::commit() {
shellDeleteQuiet(m_FileName);
m_TempFile.rename(m_FileName);
m_TempFile.setAutoRemove(false);
m_TempFile.close();
}
bool SafeWriteFile::commitIfDifferent(QByteArray &inHash) {
QByteArray newHash = hash();
if (newHash != inHash
|| !QFile::exists(m_FileName)) {
commit();
inHash = newHash;
return true;
} else {
return false;
}
}
QByteArray SafeWriteFile::hash()
{
qint64 pos = m_TempFile.pos();
m_TempFile.seek(0);
QByteArray data = m_TempFile.readAll();
m_TempFile.seek(pos);
return QCryptographicHash::hash(data, QCryptographicHash::Md5);
}
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