/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: t; c-basic-offset: 4 -*- */

/* libwpd

 * Version: MPL 2.0 / LGPLv2.1+

 *

 * 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/.

 *

 * Major Contributor(s):

 * Copyright (C) 2002 William Lachance (wrlach@gmail.com)

 * Copyright (C) 2002 Marc Maurer (uwog@uwog.net)

 * Copyright (C) 2006 Fridrich Strba (fridrich.strba@bluewin.ch)

 *

 * For minor contributions see the git repository.

 *

 * Alternatively, the contents of this file may be used under the terms

 * of the GNU Lesser General Public License Version 2.1 or later

 * (LGPLv2.1+), in which case the provisions of the LGPLv2.1+ are

 * applicable instead of those above.

 *

 * For further information visit http://libwpd.sourceforge.net

 */

/* "This product is not manufactured, approved, or supported by

 * Corel Corporation or Corel Corporation Limited."

 */

#include <string.h>

#include <limits>

#include "WP6ExtendedDocumentSummaryPacket.h"

#include "libwpd_internal.h"

WP6ExtendedDocumentSummaryPacket::WP6ExtendedDocumentSummaryPacket(librevenge::RVNGInputStream *input, WPXEncryption *encryption, int /* id */, unsigned dataOffset, unsigned dataSize) :

	WP6PrefixDataPacket(input, encryption),

	m_dataSize(dataSize),

	m_streamData(),

	m_stream()

{

	if (dataSize > 0)

		_read(input, encryption, dataOffset, dataSize);

}

WP6ExtendedDocumentSummaryPacket::~WP6ExtendedDocumentSummaryPacket()

{

}

void WP6ExtendedDocumentSummaryPacket::_readContents(librevenge::RVNGInputStream *input, WPXEncryption *encryption)

{

	if (!m_dataSize)

		return;

	if (m_dataSize > ((std::numeric_limits<unsigned>::max)() / 2))

		m_dataSize = ((std::numeric_limits<unsigned>::max)() / 2);

	m_streamData.reserve(m_dataSize);

	for (unsigned i=0; i<(unsigned)m_dataSize; i++)

		m_streamData.push_back(readU8(input, encryption));

	m_stream.reset(new WPXMemoryInputStream(m_streamData.data(), (unsigned long)m_dataSize));

}

void WP6ExtendedDocumentSummaryPacket::parse(WP6Listener *listener) const

{

	if (!m_stream)

		return;

	unsigned short groupLength = 0;

	for (unsigned i=0; i < (unsigned)m_dataSize && !m_stream->isEnd(); i+=groupLength)

	{

		try

		{

			groupLength = readU16(m_stream.get(), nullptr);

		}

		catch (FileException)

		{

			return;

		}

		if ((groupLength == 0) || m_stream->isEnd())

			return;

		unsigned short tagID = readU16(m_stream.get(), nullptr);

		if (m_stream->isEnd())

			return;

		if (m_stream->seek(2, librevenge::RVNG_SEEK_CUR))

			return;

		librevenge::RVNGString name;

		unsigned short wpChar = 0;

		if (!m_stream->isEnd())

			wpChar = readU16(m_stream.get(), nullptr);

		for (; wpChar != 0 && !m_stream->isEnd(); wpChar = readU16(m_stream.get(), nullptr))

		{

			unsigned char character = (unsigned char)(wpChar & 0x00FF);

			unsigned char characterSet = (unsigned char)((wpChar >> 8) & 0x00FF);

			const unsigned *chars;

			int len = extendedCharacterWP6ToUCS4(character,

			                                     characterSet, &chars);

			for (int j = 0; j < len; j++)

				appendUCS4(name, chars[j]);

		}

		if (tagID == WP6_INDEX_HEADER_EXTENDED_DOCUMENT_SUMMARY_CREATION_DATE ||

		        tagID == WP6_INDEX_HEADER_EXTENDED_DOCUMENT_SUMMARY_DATE_COMPLETED ||

		        tagID == WP6_INDEX_HEADER_EXTENDED_DOCUMENT_SUMMARY_RECORDED_DATE ||

		        tagID == WP6_INDEX_HEADER_EXTENDED_DOCUMENT_SUMMARY_REVISION_DATE ||

		        tagID == WP6_INDEX_HEADER_EXTENDED_DOCUMENT_SUMMARY_VERSION_DATE)

		{

			try

			{

				unsigned short year = readU16(m_stream.get(), nullptr);

				unsigned char month = readU8(m_stream.get(), nullptr);

				unsigned char day = readU8(m_stream.get(), nullptr);

				unsigned char hour = readU8(m_stream.get(), nullptr);

				unsigned char minute = readU8(m_stream.get(), nullptr);

				unsigned char second = readU8(m_stream.get(), nullptr);

				unsigned char dayOfWeek = readU8(m_stream.get(), nullptr);

				unsigned char timeZone = readU8(m_stream.get(), nullptr);

				unsigned char unused = readU8(m_stream.get(), nullptr);

				if (month > 0 && day > 0 && year >= 1900)

					listener->setDate(tagID, year, month, day, hour, minute, second, dayOfWeek, timeZone, unused);

			}

			catch (FileException)

			{

				return;

			}

		}

		else

		{

			librevenge::RVNGString data;

			if (!m_stream->isEnd())

				wpChar = readU16(m_stream.get(), nullptr);

			for (; wpChar != 0 && !m_stream->isEnd(); wpChar = readU16(m_stream.get(), nullptr))

			{

				unsigned char character = (unsigned char)(wpChar & 0x00FF);

				unsigned char characterSet = (unsigned char)((wpChar >> 8) & 0x00FF);

				const unsigned *chars;

				int len = extendedCharacterWP6ToUCS4(character,

				                                     characterSet, &chars);

				for (int j = 0; j < len; j++)

					appendUCS4(data, chars[j]);

			}

			if (data.len())

				listener->setExtendedInformation(tagID, data);

		}

		m_stream->seek((i+groupLength), librevenge::RVNG_SEEK_SET);

	}

}

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