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

/*

 * This file is part of the LibreOffice 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 <sal/config.h>

#include <string_view>

#include <pdf/XmpMetadata.hxx>

#include <tools/XmlWriter.hxx>

namespace vcl::pdf

{

namespace

{

constexpr const char* constPadding = "                                        "

                                     "                                        "

                                     "                                        "

                                     "                                        "

                                     "                                        "

                                     "\n";

}

XmpMetadata::XmpMetadata() = default;

void XmpMetadata::write()

{

    mpMemoryStream = std::make_unique<SvMemoryStream>(4096 /*Initial*/, 64 /*Resize*/);

    // Header

    mpMemoryStream->WriteOString(std::string_view(reinterpret_cast<char const*>(

        u8"<?xpacket begin=\"\uFEFF\" id=\"W5M0MpCehiHzreSzNTczkc9d\"?>\n")));

    {

        tools::XmlWriter aXmlWriter(mpMemoryStream.get());

        aXmlWriter.startDocument(2, false);

        aXmlWriter.startElement("x"_ostr, "xmpmeta"_ostr, "adobe:ns:meta/"_ostr);

        aXmlWriter.startElement("rdf"_ostr, "RDF"_ostr,

                                "http://www.w3.org/1999/02/22-rdf-syntax-ns#"_ostr);

        // PDF/A part ( ISO 19005-1:2005 - 6.7.11 )

        if (mnPDF_A > 0)

        {

            OString sPdfVersion = OString::number(mnPDF_A);

            aXmlWriter.startElement("rdf:Description");

            aXmlWriter.attribute("rdf:about", "");

            aXmlWriter.attribute("xmlns:pdfaid", "http://www.aiim.org/pdfa/ns/id/");

            aXmlWriter.startElement("pdfaid:part");

            aXmlWriter.content(sPdfVersion);

            aXmlWriter.endElement();

            if (mnPDF_A == 4)

            {

                aXmlWriter.startElement("pdfaid:rev");

                aXmlWriter.content("2020");

                aXmlWriter.endElement();

            }

            if (!msConformance.isEmpty())

            {

                aXmlWriter.startElement("pdfaid:conformance");

                aXmlWriter.content(msConformance);

                aXmlWriter.endElement();

            }

            aXmlWriter.endElement();

        }

        // Dublin Core properties

        if (!msTitle.isEmpty() || !msAuthor.isEmpty() || !msSubject.isEmpty()

            || !maContributor.empty() || !msCoverage.isEmpty() || !msIdentifier.isEmpty()

            || !maPublisher.empty() || !maRelation.empty() || !msRights.isEmpty()

            || !msSource.isEmpty() || !msType.isEmpty())

        {

            aXmlWriter.startElement("rdf:Description");

            aXmlWriter.attribute("rdf:about", "");

            aXmlWriter.attribute("xmlns:dc", "http://purl.org/dc/elements/1.1/");

            aXmlWriter.startElement("dc:format");

            aXmlWriter.content("application/pdf");

            aXmlWriter.endElement();

            aXmlWriter.startElement("dc:date");

            aXmlWriter.startElement("rdf:Seq");

            aXmlWriter.startElement("rdf:li");

            aXmlWriter.content(m_sCreateDate);

            aXmlWriter.endElement();

            aXmlWriter.endElement();

            aXmlWriter.endElement();

            if (!msTitle.isEmpty())

            {

                // this is according to PDF/A-1, technical corrigendum 1 (2007-04-01)

                aXmlWriter.startElement("dc:title");

                aXmlWriter.startElement("rdf:Alt");

                aXmlWriter.startElement("rdf:li");

                aXmlWriter.attribute("xml:lang", "x-default");

                aXmlWriter.content(msTitle);

                aXmlWriter.endElement();

                aXmlWriter.endElement();

                aXmlWriter.endElement();

            }

            if (!msAuthor.isEmpty())

            {

                aXmlWriter.startElement("dc:creator");

                aXmlWriter.startElement("rdf:Seq");

                aXmlWriter.startElement("rdf:li");

                aXmlWriter.content(msAuthor);

                aXmlWriter.endElement();

                aXmlWriter.endElement();

                aXmlWriter.endElement();

            }

            if (!msSubject.isEmpty())

            {

                aXmlWriter.startElement("dc:description");

                aXmlWriter.startElement("rdf:Alt");

                aXmlWriter.startElement("rdf:li");

                aXmlWriter.attribute("xml:lang", "x-default");

                aXmlWriter.content(msSubject);

                aXmlWriter.endElement();

                aXmlWriter.endElement();

                aXmlWriter.endElement();

            }

            if (!maContributor.empty())

            {

                aXmlWriter.startElement("dc:contributor");

                aXmlWriter.startElement("rdf:Bag");

                for (const OString& rContributor : maContributor)

                {

                    aXmlWriter.startElement("rdf:li");

                    aXmlWriter.content(rContributor);

                    aXmlWriter.endElement();

                }

                aXmlWriter.endElement();

                aXmlWriter.endElement();

            }

            if (!msCoverage.isEmpty())

            {

                aXmlWriter.startElement("dc:coverage");

                aXmlWriter.content(msCoverage);

                aXmlWriter.endElement();

            }

            if (!msIdentifier.isEmpty())

            {

                aXmlWriter.startElement("dc:identifier");

                aXmlWriter.content(msIdentifier);

                aXmlWriter.endElement();

            }

            if (!maPublisher.empty())

            {

                aXmlWriter.startElement("dc:publisher");

                aXmlWriter.startElement("rdf:Bag");

                for (const OString& rPublisher : maPublisher)

                {

                    aXmlWriter.startElement("rdf:li");

                    aXmlWriter.content(rPublisher);

                    aXmlWriter.endElement();

                }

                aXmlWriter.endElement();

                aXmlWriter.endElement();

            }

            if (!maRelation.empty())

            {

                aXmlWriter.startElement("dc:relation");

                aXmlWriter.startElement("rdf:Bag");

                for (const OString& rRelation : maRelation)

                {

                    aXmlWriter.startElement("rdf:li");

                    aXmlWriter.content(rRelation);

                    aXmlWriter.endElement();

                }

                aXmlWriter.endElement();

                aXmlWriter.endElement();

            }

            if (!msRights.isEmpty())

            {

                aXmlWriter.startElement("dc:rights");

                aXmlWriter.startElement("rdf:Alt");

                aXmlWriter.startElement("rdf:li");

                aXmlWriter.attribute("xml:lang", "x-default");

                aXmlWriter.content(msRights);

                aXmlWriter.endElement();

                aXmlWriter.endElement();

                aXmlWriter.endElement();

            }

            if (!msSource.isEmpty())

            {

                aXmlWriter.startElement("dc:source");

                aXmlWriter.content(msSource);

                aXmlWriter.endElement();

            }

            if (!msType.isEmpty())

            {

                aXmlWriter.startElement("dc:type");

                aXmlWriter.content(msType);

                aXmlWriter.endElement();

            }

            aXmlWriter.endElement();

        }

        // PDF/UA

        if (mnPDF_UA > 0)

        {

            if (mnPDF_A != 0)

            { // tdf#157517 PDF/A extension schema is required

                aXmlWriter.startElement("rdf:Description");

                aXmlWriter.attribute("rdf:about", "");

                aXmlWriter.attribute("xmlns:pdfaExtension",

                                     "http://www.aiim.org/pdfa/ns/extension/");

                aXmlWriter.attribute("xmlns:pdfaSchema", "http://www.aiim.org/pdfa/ns/schema#");

                aXmlWriter.attribute("xmlns:pdfaProperty", "http://www.aiim.org/pdfa/ns/property#");

                aXmlWriter.startElement("pdfaExtension:schemas");

                aXmlWriter.startElement("rdf:Bag");

                aXmlWriter.startElement("rdf:li");

                aXmlWriter.attribute("rdf:parseType", "Resource");

                aXmlWriter.startElement("pdfaSchema:namespaceURI");

                aXmlWriter.content("http://www.aiim.org/pdfua/ns/id/");

                aXmlWriter.endElement();

                aXmlWriter.startElement("pdfaSchema:prefix");

                aXmlWriter.content("pdfuaid");

                aXmlWriter.endElement();

                aXmlWriter.startElement("pdfaSchema:schema");

                aXmlWriter.content("PDF/UA identification schema");

                aXmlWriter.endElement();

                aXmlWriter.startElement("pdfaSchema:property");

                aXmlWriter.startElement("rdf:Seq");

                aXmlWriter.startElement("rdf:li");

                aXmlWriter.attribute("rdf:parseType", "Resource");

                aXmlWriter.startElement("pdfaProperty:category");

                aXmlWriter.content("internal");

                aXmlWriter.endElement();

                aXmlWriter.startElement("pdfaProperty:description");

                aXmlWriter.content("PDF/UA version identifier");

                aXmlWriter.endElement();

                aXmlWriter.startElement("pdfaProperty:name");

                aXmlWriter.content("part");

                aXmlWriter.endElement();

                aXmlWriter.startElement("pdfaProperty:valueType");

                aXmlWriter.content("Integer");

                aXmlWriter.endElement();

                aXmlWriter.endElement(); // rdf:li

                aXmlWriter.startElement("rdf:li");

                aXmlWriter.attribute("rdf:parseType", "Resource");

                aXmlWriter.startElement("pdfaProperty:category");

                aXmlWriter.content("internal");

                aXmlWriter.endElement();

                aXmlWriter.startElement("pdfaProperty:description");

                aXmlWriter.content("PDF/UA amendment identifier");

                aXmlWriter.endElement();

                aXmlWriter.startElement("pdfaProperty:name");

                aXmlWriter.content("amd");

                aXmlWriter.endElement();

                aXmlWriter.startElement("pdfaProperty:valueType");

                aXmlWriter.content("Text");

                aXmlWriter.endElement();

                aXmlWriter.endElement(); // rdf:li

                aXmlWriter.startElement("rdf:li");

                aXmlWriter.attribute("rdf:parseType", "Resource");

                aXmlWriter.startElement("pdfaProperty:category");

                aXmlWriter.content("internal");

                aXmlWriter.endElement();

                aXmlWriter.startElement("pdfaProperty:description");

                aXmlWriter.content("PDF/UA corrigenda identifier");

                aXmlWriter.endElement();

                aXmlWriter.startElement("pdfaProperty:name");

                aXmlWriter.content("corr");

                aXmlWriter.endElement();

                aXmlWriter.startElement("pdfaProperty:valueType");

                aXmlWriter.content("Text");

                aXmlWriter.endElement();

                aXmlWriter.endElement(); // rdf:li

                aXmlWriter.endElement(); // rdf:Seq

                aXmlWriter.endElement(); // pdfaSchema:property

                aXmlWriter.endElement(); // rdf:li

                aXmlWriter.endElement(); // rdf:Bag

                aXmlWriter.endElement(); // pdfaExtension:schemas

                aXmlWriter.endElement(); // rdf:Description

            }

            OString sPdfUaVersion = OString::number(mnPDF_UA);

            aXmlWriter.startElement("rdf:Description");

            aXmlWriter.attribute("rdf:about", "");

            aXmlWriter.attribute("xmlns:pdfuaid", "http://www.aiim.org/pdfua/ns/id/");

            aXmlWriter.startElement("pdfuaid:part");

            aXmlWriter.content(sPdfUaVersion);

            aXmlWriter.endElement();

            if (mnPDF_UA == 2)

            {

                aXmlWriter.startElement("pdfuaid:rev");

                aXmlWriter.content("2024");

                aXmlWriter.endElement();

            }

            aXmlWriter.endElement();

        }

        // PDF properties

        if (!msProducer.isEmpty() || !msKeywords.isEmpty() || !msPDFVersion.isEmpty())

        {

            aXmlWriter.startElement("rdf:Description");

            aXmlWriter.attribute("rdf:about", "");

            aXmlWriter.attribute("xmlns:pdf", "http://ns.adobe.com/pdf/1.3/");

            if (!msProducer.isEmpty())

            {

                aXmlWriter.startElement("pdf:Producer");

                aXmlWriter.content(msProducer);

                aXmlWriter.endElement();

            }

            if (!msKeywords.isEmpty())

            {

                aXmlWriter.startElement("pdf:Keywords");

                aXmlWriter.content(msKeywords);

                aXmlWriter.endElement();

            }

            if (!msPDFVersion.isEmpty())

            {

                aXmlWriter.startElement("pdf:PDFVersion");

                aXmlWriter.content(msPDFVersion);

                aXmlWriter.endElement();

            }

            aXmlWriter.endElement();

        }

        // XMP Basic schema

        aXmlWriter.startElement("rdf:Description");

        aXmlWriter.attribute("rdf:about", "");

        aXmlWriter.attribute("xmlns:xmp", "http://ns.adobe.com/xap/1.0/");

        if (!m_sCreatorTool.isEmpty())

        {

            aXmlWriter.startElement("xmp:CreatorTool");

            aXmlWriter.content(m_sCreatorTool);

            aXmlWriter.endElement();

        }

        aXmlWriter.startElement("xmp:CreateDate");

        aXmlWriter.content(m_sCreateDate);

        aXmlWriter.endElement();

        aXmlWriter.startElement("xmp:ModifyDate");

        aXmlWriter.content(m_sCreateDate);

        aXmlWriter.endElement();

        aXmlWriter.startElement("xmp:MetadataDate");

        aXmlWriter.content(m_sCreateDate);

        aXmlWriter.endElement();

        aXmlWriter.endElement();

        aXmlWriter.endElement();

        aXmlWriter.endElement();

        aXmlWriter.endDocument();

    }

    // add padding (needed so the metadata can be changed in-place"

    for (sal_Int32 nSpaces = 1; nSpaces <= 21; nSpaces++)

        mpMemoryStream->WriteOString(constPadding);

    mpMemoryStream->WriteOString("<?xpacket end=\"w\"?>\n");

    mbWritten = true;

}

sal_uInt64 XmpMetadata::getSize()

{

    if (!mbWritten)

        write();

    return mpMemoryStream->GetSize();

}

const void* XmpMetadata::getData()

{

    if (!mbWritten)

        write();

    return mpMemoryStream->GetData();

}

} // end vcl::pdf

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */