/****************************************************************************
**
** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of Qt Creator.
**
** 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
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** use the contact form at http://qt.digia.com/contact-us.
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** 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.
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****************************************************************************/

#ifndef CORE_ID_H
#define CORE_ID_H

#include "core_global.h"

#include <QMetaType>
#include <QString>
#include <QVariant>

namespace Core {

// FIXME: Make this a wrapper around an int, not around a QByteArray.
class CORE_EXPORT Id
{
public:
    enum { IdsPerPlugin = 10000, ReservedPlugins = 1000 };

    Id() : m_id(0) {}
    Id(int uid) : m_id(uid) {}
    Id(const char *name);
    explicit Id(const QString &name);
    explicit Id(const QByteArray &name);

    Id withSuffix(int suffix) const;
    Id withSuffix(const char *name) const;
    Id withPrefix(const char *name) const;

    QByteArray name() const;
    QString toString() const; // Avoid.
    QVariant toSetting() const; // Good to use.
    bool isValid() const { return m_id; }
    bool operator==(Id id) const { return m_id == id.m_id; }
    bool operator==(const char *name) const;
    bool operator!=(Id id) const { return m_id != id.m_id; }
    bool operator!=(const char *name) const { return !operator==(name); }
    bool operator<(Id id) const { return m_id < id.m_id; }
    bool operator>(Id id) const { return m_id > id.m_id; }
    bool alphabeticallyBefore(Id other) const;
    int uniqueIdentifier() const { return m_id; }
    static Id fromUniqueIdentifier(int uid) { return Id(uid); }
    static Id fromString(const QString &str); // FIXME: avoid.
    static Id fromName(const QByteArray &ba); // FIXME: avoid.
    static Id fromSetting(const QVariant &variant); // Good to use.
    static void registerId(int uid, const char *name);

private:
    // Intentionally unimplemented
    Id(const QLatin1String &);
    int m_id;
};

inline uint qHash(const Id &id) { return id.uniqueIdentifier(); }

} // namespace Core

Q_DECLARE_METATYPE(Core::Id)
Q_DECLARE_METATYPE(QList<Core::Id>)

#endif // CORE_ID_H
