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/****************************************************************************
**
** Copyright (C) 2012-2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Installer Framework.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia.  For licensing terms and
** conditions see http://qt.digia.com/licensing.  For further information
** use the contact form at http://qt.digia.com/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 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights.  These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.  Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "packagemanagercoredata.h"

#include "errors.h"
#include "fileutils.h"
#include "qsettingswrapper.h"

#include <QDir>

namespace QInstaller
{

PackageManagerCoreData::PackageManagerCoreData(const QHash<QString, QString> &variables)
{
    m_variables = variables;

    // Set some common variables that may used e.g. as placeholder in some of the settings variables or
    // in a script or...
    m_variables.insert(QLatin1String("rootDir"), QDir::rootPath());
    m_variables.insert(QLatin1String("homeDir"), QDir::homePath());
    m_variables.insert(scTargetConfigurationFile, QLatin1String("components.xml"));

#ifdef Q_OS_WIN
    m_variables.insert(QLatin1String("os"), QLatin1String("win"));
#elif defined(Q_OS_MAC)
    m_variables.insert(QLatin1String("os"), QLatin1String("mac"));
#elif defined(Q_OS_LINUX)
    m_variables.insert(QLatin1String("os"), QLatin1String("x11"));
#elif defined(Q_OS_QWS)
    m_variables.insert(QLatin1String("os"), QLatin1String("Qtopia"));
#else
    // TODO: add more platforms as needed...
#endif

    try {
        m_settings = Settings::fromFileAndPrefix(QLatin1String(":/metadata/installer-config/config.xml"),
            QLatin1String(":/metadata/installer-config/"));
    } catch (const Error &e) {
        // TODO: try better error handling
        qCritical("Could not parse Config: %s", qPrintable(e.message()));
        return;
    }

    // fill the variables defined in the settings
    m_variables.insert(QLatin1String("ProductName"), m_settings.applicationName());
    m_variables.insert(QLatin1String("ProductVersion"), m_settings.applicationVersion());
    m_variables.insert(scTitle, m_settings.title());
    m_variables.insert(scPublisher, m_settings.publisher());
    m_variables.insert(QLatin1String("Url"), m_settings.url());
    m_variables.insert(scStartMenuDir, m_settings.startMenuDir());
    m_variables.insert(scTargetConfigurationFile, m_settings.configurationFileName());
    m_variables.insert(QLatin1String("LogoPixmap"), m_settings.logo());
    m_variables.insert(QLatin1String("WatermarkPixmap"), m_settings.watermark());

    const QString description = m_settings.runProgramDescription();
    if (!description.isEmpty())
        m_variables.insert(scRunProgramDescription, description);

    m_variables.insert(scTargetDir, replaceVariables(m_settings.targetDir()));
    m_variables.insert(scRunProgram, replaceVariables(m_settings.runProgram()));
    m_variables.insert(scRunProgramArguments, replaceVariables(m_settings.runProgramArguments()));
    m_variables.insert(scRemoveTargetDir, replaceVariables(m_settings.removeTargetDir()));
}

void PackageManagerCoreData::clear()
{
    m_variables.clear();
    m_settings = Settings();
}

Settings &PackageManagerCoreData::settings() const
{
    return m_settings;
}

QList<QString> PackageManagerCoreData::keys() const
{
    return m_variables.keys();
}

bool PackageManagerCoreData::contains(const QString &key) const
{
    return m_variables.contains(key) || m_settings.containsValue(key);
}

bool PackageManagerCoreData::setValue(const QString &key, const QString &normalizedValue)
{
    if (m_variables.value(key) == normalizedValue)
        return false;
    m_variables.insert(key, normalizedValue);
    return true;
}

QVariant PackageManagerCoreData::value(const QString &key, const QVariant &_default) const
{
    if (key == scTargetDir) {
        QString dir = m_variables.value(key);
        if (dir.isEmpty())
            dir = m_settings.value(key, _default).toString();
#ifdef Q_OS_WIN
        return QInstaller::normalizePathName(dir);
#else
        if (dir.startsWith(QLatin1String("~/")))
            return QDir::home().absoluteFilePath(dir.mid(2));
        return dir;
#endif
    }

#ifdef Q_OS_WIN
    if (!m_variables.contains(key)) {
        static const QRegExp regex(QLatin1String("\\\\|/"));
        const QString filename = key.section(regex, 0, -2);
        const QString regKey = key.section(regex, -1);
        const QSettingsWrapper registry(filename, QSettingsWrapper::NativeFormat);
        if (!filename.isEmpty() && !regKey.isEmpty() && registry.contains(regKey))
            return registry.value(regKey).toString();
    }
#endif

    if (m_variables.contains(key))
        return m_variables.value(key);

    return m_settings.value(key, _default);
}

QString PackageManagerCoreData::replaceVariables(const QString &str) const
{
    static const QChar at = QLatin1Char('@');
    QString res;
    int pos = 0;
    while (true) {
        const int pos1 = str.indexOf(at, pos);
        if (pos1 == -1)
            break;
        const int pos2 = str.indexOf(at, pos1 + 1);
        if (pos2 == -1)
            break;
        res += str.mid(pos, pos1 - pos);
        const QString name = str.mid(pos1 + 1, pos2 - pos1 - 1);
        res += value(name).toString();
        pos = pos2 + 1;
    }
    res += str.mid(pos);
    return res;
}

QByteArray PackageManagerCoreData::replaceVariables(const QByteArray &ba) const
{
    static const QChar at = QLatin1Char('@');
    QByteArray res;
    int pos = 0;
    while (true) {
        const int pos1 = ba.indexOf(at, pos);
        if (pos1 == -1)
            break;
        const int pos2 = ba.indexOf(at, pos1 + 1);
        if (pos2 == -1)
            break;
        res += ba.mid(pos, pos1 - pos);
        const QString name = QString::fromLocal8Bit(ba.mid(pos1 + 1, pos2 - pos1 - 1));
        res += value(name).toString().toLocal8Bit();
        pos = pos2 + 1;
    }
    res += ba.mid(pos);
    return res;
}

}   // namespace QInstaller