/**************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Installer Framework.
**
** $QT_BEGIN_LICENSE:GPL-EXCEPT$
** Commercial License Usage
** Licensees holding valid commercial Qt 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 General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 as published by the Free Software
** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
** 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-3.0.html.
**
** $QT_END_LICENSE$
**
**************************************************************************/
#include "createlinkoperation.h"

#include "link.h"

#include <QDir>
#include <QFileInfo>

using namespace QInstaller;

CreateLinkOperation::CreateLinkOperation(PackageManagerCore *core)
    : UpdateOperation(core)
{
    setName(QLatin1String("CreateLink"));
}

void CreateLinkOperation::backup()
{
}

bool CreateLinkOperation::performOperation()
{
    if (!checkArgumentCount(2))
        return false;

    const QStringList args = arguments();
    const QString& linkPath = args.at(0);
    const QString& targetPath = args.at(1);
    Link link = Link::create(linkPath, targetPath);

    if (!link.exists()) {
        setError(UserDefinedError);
        setErrorString(tr("Cannot create link from \"%1\" to \"%2\".").arg(
                           QDir::toNativeSeparators(linkPath), QDir::toNativeSeparators(targetPath)));
        return false;
    }

    return true;
}

bool CreateLinkOperation::undoOperation()
{
    QStringList args = arguments();

    const QString& linkPath = args.at(0);
    const QString& targetPath = args.at(1);

    Link link = Link(linkPath);
    if (!link.exists()) {
        return true;
    }
    if (!link.remove()) {
        setError(UserDefinedError);
        setErrorString(tr("Cannot remove link from \"%1\" to \"%2\".").arg(
                           QDir::toNativeSeparators(linkPath), QDir::toNativeSeparators(targetPath)));
        return false;
    }

    return !QFileInfo(linkPath).exists();
}

bool CreateLinkOperation::testOperation()
{
    return true;
}