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/****************************************************************************
**
** Copyright (C) 2017 Pelagicore AG
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Pelagicore Application Manager.
**
** $QT_BEGIN_LICENSE:LGPL-QTAS$
** Commercial License Usage
** Licensees holding valid commercial Qt Automotive Suite licenses may use
** this file in accordance with the commercial license agreement provided
** with the Software or, alternatively, in accordance with the terms
** contained in a written agreement between you and The Qt Company. For
** licensing terms and conditions see https://www.qt.io/terms-conditions.
** For further information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
** SPDX-License-Identifier: LGPL-3.0
**
****************************************************************************/
#include <QFile>
#include <QDataStream>
#include <QTemporaryFile>
#include <QScopedPointer>
#include "application.h"
#include "applicationdatabase.h"
QT_BEGIN_NAMESPACE_AM
class ApplicationDatabasePrivate
{
public:
QFile *file = nullptr;
ApplicationDatabasePrivate()
{ }
~ApplicationDatabasePrivate()
{ delete file; }
};
ApplicationDatabase::ApplicationDatabase(const QString &fileName)
: d(new ApplicationDatabasePrivate())
{
d->file = new QFile(fileName);
d->file->open(QFile::ReadWrite);
}
ApplicationDatabase::ApplicationDatabase()
: d(new ApplicationDatabasePrivate())
{
d->file = new QTemporaryFile(qSL("am-apps-db"));
d->file->open(QFile::ReadWrite);
}
ApplicationDatabase::~ApplicationDatabase()
{
delete d;
}
bool ApplicationDatabase::isValid() const
{
return d->file && d->file->isOpen();
}
bool ApplicationDatabase::isTemporary() const
{
return qobject_cast<QTemporaryFile *>(d->file);
}
QString ApplicationDatabase::errorString() const
{
return d->file->errorString();
}
QString ApplicationDatabase::name() const
{
return d->file->fileName();
}
QVector<const Application *> ApplicationDatabase::read() Q_DECL_NOEXCEPT_EXPR(false)
{
if (!d->file || !d->file->isOpen() || !d->file->isReadable())
throw Exception("application database %1 is not opened for reading").arg(d->file ? d->file->fileName() : qSL("<null>"));
QVector<const Application *> apps;
if (d->file->seek(0)) {
QDataStream ds(d->file);
forever {
QScopedPointer<Application> app(Application::readFromDataStream(ds, apps));
if (ds.status() != QDataStream::Ok) {
if (ds.status() != QDataStream::ReadPastEnd) {
qDeleteAll(apps);
throw Exception("could not read from application database %1").arg(d->file->fileName());
}
break;
}
apps << app.take();
}
}
return apps;
}
void ApplicationDatabase::write(const QVector<const Application *> &apps) Q_DECL_NOEXCEPT_EXPR(false)
{
if (!d->file || !d->file->isOpen() || !d->file->isWritable())
throw Exception("application database %1 is not opened for writing").arg(d->file ? d->file->fileName() : qSL("<null>"));
if (!d->file->seek(0))
throw Exception(*d->file, "could not not seek to position 0 in the application database");
if (!d->file->resize(0))
throw Exception(*d->file, "could not truncate the application database");
QDataStream ds(d->file);
for (const Application *app : apps)
app->writeToDataStream(ds, apps);
if (ds.status() != QDataStream::Ok)
throw Exception(*d->file, "could not write to application database");
}
void ApplicationDatabase::invalidate()
{
if (d->file) {
if (d->file->isOpen())
d->file->close();
d->file->remove();
d->file = nullptr;
}
}
QT_END_NAMESPACE_AM
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