/****************************************************************************
**
** https://www.qxorm.com/
** Copyright (C) 2013 XDL Team (ic-east.com)
**
** This file is part of the QxOrm library
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any
** damages arising from the use of this software
**
** Commercial Usage
** Licensees holding valid commercial QxOrm 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 XDL Team
**
** 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.gpl3.txt' 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
**
** If you are unsure which license is appropriate for your use, or
** if you have questions regarding the use of this file, please contact :
** ic-east.com
**
****************************************************************************/

#ifndef _QX_ENABLE_BOOST
#ifndef _QX_BOOST_OPTIONAL_ONLY_H_
#define _QX_BOOST_OPTIONAL_ONLY_H_

#ifdef _MSC_VER
#pragma once
#endif

/*!
 * \file QxBoostOptionalOnly.h
 * \author XDL Team
 * \ingroup QxExtras
 * \brief Provides support for boost::optional<T> to manage NULL values even if _QX_ENABLE_BOOST compilation option is not defined : so this header file enables just boost::optional feature and should be included just after <QxOrm.h> header file (ideally in a precompiled header)
 */

#include <boost/optional.hpp>
#include <boost/none.hpp>

#include <QxOrm.h>

#define _QX_ENABLE_BOOST
#include <QxSerialize/QDataStream/QxSerializeQDataStream_boost_optional.h>
#undef _QX_ENABLE_BOOST

#include <QxTraits/construct_null_qvariant.h>

QX_REGISTER_CLASS_NAME_TEMPLATE_1(boost::optional)

namespace qx
{
   namespace trait
   {

      template <typename T>
      struct get_sql_type<boost::optional<T>>
      {
         static inline const char *get() { return qx::trait::get_sql_type<T>::get(); }
      };

   } // namespace trait
} // namespace qx

namespace qx
{
   namespace cvt
   {
      namespace detail
      {

#ifndef _QX_NO_JSON

         template <typename T>
         struct QxConvert_ToJson<boost::optional<T>>
         {
            static inline QJsonValue toJson(const boost::optional<T> &t, const QString &format)
            {
               if (t)
               {
                  return qx::cvt::to_json((*t), format);
               };
               return QJsonValue();
            }
         };

         template <typename T>
         struct QxConvert_FromJson<boost::optional<T>>
         {
            static inline qx_bool fromJson(const QJsonValue &j, boost::optional<T> &t, const QString &format)
            {
               if (j.isNull())
               {
                  t = boost::none;
                  return qx_bool(true);
               }
               else if (!t)
               {
                  t = T();
               }
               return qx::cvt::from_json(j, (*t), format);
            }
         };

#endif // _QX_NO_JSON

         template <typename T>
         struct QxConvert_ToString<boost::optional<T>>
         {
            static inline QString toString(const boost::optional<T> &t, const QString &format, int index, qx::cvt::context::ctx_type ctx)
            {
               if (t)
               {
                  return qx::cvt::to_string((*t), format, index, ctx);
               };
               return QString();
            }
         };

         template <typename T>
         struct QxConvert_FromString<boost::optional<T>>
         {
            static inline qx_bool fromString(const QString &s, boost::optional<T> &t, const QString &format, int index, qx::cvt::context::ctx_type ctx)
            {
               if (!t)
               {
                  t = T();
               };
               return qx::cvt::from_string(s, (*t), format, index, ctx);
            }
         };

         template <typename T>
         struct QxConvert_ToVariant<boost::optional<T>>
         {
            static inline QVariant toVariant(const boost::optional<T> &t, const QString &format, int index, qx::cvt::context::ctx_type ctx)
            {
               if (t)
               {
                  return qx::cvt::to_variant((*t), format, index, ctx);
               };
               return qx::trait::construct_null_qvariant<T>::get();
            }
         };

         template <typename T>
         struct QxConvert_FromVariant<boost::optional<T>>
         {
            static inline qx_bool fromVariant(const QVariant &v, boost::optional<T> &t, const QString &format, int index, qx::cvt::context::ctx_type ctx)
            {
               if (v.isNull())
               {
                  t = boost::none;
                  return qx_bool(true);
               }
               else if (!t)
               {
                  t = T();
               }
               return qx::cvt::from_variant(v, (*t), format, index, ctx);
            }
         };

      } // namespace detail
   } // namespace cvt
} // namespace qx

#endif // _QX_BOOST_OPTIONAL_ONLY_H_
#endif // _QX_ENABLE_BOOST