/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/*

 * This file is part of the libqxp project.

 *

 * This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/.

 */

#include "QXPDetector.h"

#include "QXP1Header.h"

#include "QXP33Header.h"

#include "QXP3HeaderBase.h"

#include "QXP4Header.h"

#include "QXPMacFileParser.h"

#include "QXPParser.h"

namespace libqxp

{

namespace

{

class QXP3Detector : public QXP3HeaderBase

{

public:

  bool isSupported()

  {

    switch (m_version)

    {

    case QXPVersion::QXP_31_MAC:

    case QXPVersion::QXP_31:

    case QXPVersion::QXP_33:

    case QXPVersion::QXP_4:

      return m_signature == "XPR";

    default:

      return false;

    }

  }

  std::shared_ptr<QXPHeader> createHeader(const boost::optional<QXPDocument::Type> type = boost::none)

  {

    switch (m_version)

    {

    case QXPVersion::QXP_31_MAC:

    case QXPVersion::QXP_31:

    case QXPVersion::QXP_33:

      return std::make_shared<QXP33Header>(type);

    case QXPVersion::QXP_4:

      return std::make_shared<QXP4Header>(type);

    default:

      return nullptr;

    }

  }

private:

  QXPDocument::Type getType() const override

  {

    return QXPDocument::TYPE_UNKNOWN;

  }

  std::unique_ptr<QXPParser> createParser(const std::shared_ptr<librevenge::RVNGInputStream> &, librevenge::RVNGDrawingInterface *) override

  {

    return nullptr;

  }

};

}

QXPDetector::QXPDetector()

  : m_input()

  , m_header()

  , m_type(QXPDocument::TYPE_UNKNOWN)

  , m_supported(false)

{

}

void QXPDetector::detect(const std::shared_ptr<librevenge::RVNGInputStream> &input)

{

  boost::optional<QXPDocument::Type> docType;

  std::shared_ptr<librevenge::RVNGInputStream> docStream;

  std::string type;

  std::string creator;

  QXPMacFileParser macFile(docStream, type, creator);

  if (macFile.parse(input))

  {

    if (creator == "XPR3")

    {

      if (type == "XDOC")

        docType = QXPDocument::TYPE_DOCUMENT;

      else if (type == "XTMP")

        docType = QXPDocument::TYPE_TEMPLATE;

      else if (type == "XBOK")

        docType = QXPDocument::TYPE_BOOK;

      else if (type == "XLIB")

        docType = QXPDocument::TYPE_LIBRARY;

    }

    else if (creator == "XPRS" && type == "XDOC")

    {

      m_input = docStream;

      m_header = std::make_shared<QXP1Header>();

    }

  }

  else

  {

    docStream = input;

  }

  if (!m_header)

  {

    QXP3Detector detector;

    if (detector.load(docStream) && detector.isSupported())

    {

      m_input = docStream;

      m_header = detector.createHeader(docType);

    }

  }

  if (bool(m_header))

  {

    m_input->seek(0, librevenge::RVNG_SEEK_SET);

    m_header->load(m_input);

    m_type = m_header->getType();

    m_supported = m_type != QXPDocument::TYPE_UNKNOWN;

  }

}

const std::shared_ptr<librevenge::RVNGInputStream> &QXPDetector::input() const

{

  return m_input;

}

const std::shared_ptr<QXPHeader> &QXPDetector::header() const

{

  return m_header;

}

bool QXPDetector::isSupported() const

{

  return m_supported;

}

QXPDocument::Type QXPDetector::type() const

{

  return m_type;

}

} // namespace libqxp

/* vim:set shiftwidth=2 softtabstop=2 expandtab: */