assimp/code/3MF/D3MFOpcPackage.cpp

/*
Open Asset Import Library (assimp)
----------------------------------------------------------------------

Copyright (c) 2006-2020, assimp team


All rights reserved.

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* Redistributions of source code must retain the above
  copyright notice, this list of conditions and the
  following disclaimer.

* Redistributions in binary form must reproduce the above
  copyright notice, this list of conditions and the
  following disclaimer in the documentation and/or other
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* Neither the name of the assimp team, nor the names of its
  contributors may be used to endorse or promote products
  derived from this software without specific prior
  written permission of the assimp team.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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*/

#ifndef ASSIMP_BUILD_NO_3MF_IMPORTER

#include "D3MFOpcPackage.h"
#include <assimp/Exceptional.h>

#include <assimp/IOStream.hpp>
#include <assimp/IOSystem.hpp>
#include <assimp/DefaultLogger.hpp>
#include <assimp/ai_assert.h>
#include <assimp/ZipArchiveIOSystem.h>

#include <cstdlib>
#include <memory>
#include <vector>
#include <map>
#include <algorithm>
#include <cassert>
#include "3MFXmlTags.h"

namespace Assimp {

namespace D3MF {
// ------------------------------------------------------------------------------------------------

typedef std::shared_ptr<OpcPackageRelationship> OpcPackageRelationshipPtr;

class OpcPackageRelationshipReader {
public:
    OpcPackageRelationshipReader(XmlReader* xmlReader) {        
        while(xmlReader->read()) {
            if(xmlReader->getNodeType() == irr::io::EXN_ELEMENT &&
               xmlReader->getNodeName() == XmlTag::RELS_RELATIONSHIP_CONTAINER)
            {
                ParseRootNode(xmlReader);
            }
        }
    }

    void ParseRootNode(XmlReader* xmlReader)
    {       
        ParseAttributes(xmlReader);

        while(xmlReader->read())
        {
            if(xmlReader->getNodeType() == irr::io::EXN_ELEMENT &&
               xmlReader->getNodeName() == XmlTag::RELS_RELATIONSHIP_NODE)
            {
                ParseChildNode(xmlReader);
            }
        }
    }

    void ParseAttributes(XmlReader*) {
        // empty
    }

    bool validateRels( OpcPackageRelationshipPtr &relPtr ) {
        if ( relPtr->id.empty() || relPtr->type.empty() || relPtr->target.empty() ) {
            return false;
        }
        return true;
    }

    void ParseChildNode(XmlReader* xmlReader) {        
        OpcPackageRelationshipPtr relPtr(new OpcPackageRelationship());

        relPtr->id = xmlReader->getAttributeValueSafe(XmlTag::RELS_ATTRIB_ID.c_str());
        relPtr->type = xmlReader->getAttributeValueSafe(XmlTag::RELS_ATTRIB_TYPE.c_str());
        relPtr->target = xmlReader->getAttributeValueSafe(XmlTag::RELS_ATTRIB_TARGET.c_str());
        if ( validateRels( relPtr ) ) {
            m_relationShips.push_back( relPtr );
        }
    }

    std::vector<OpcPackageRelationshipPtr> m_relationShips;
};

// ------------------------------------------------------------------------------------------------
D3MFOpcPackage::D3MFOpcPackage(IOSystem* pIOHandler, const std::string& rFile)
: mRootStream(nullptr)
, mZipArchive() {    
    mZipArchive.reset( new ZipArchiveIOSystem( pIOHandler, rFile ) );
    if(!mZipArchive->isOpen()) {
        throw DeadlyImportError("Failed to open file " + rFile+ ".");
    }

    std::vector<std::string> fileList;
    mZipArchive->getFileList(fileList);

    for (auto& file: fileList) {
        if(file == D3MF::XmlTag::ROOT_RELATIONSHIPS_ARCHIVE) {
            //PkgRelationshipReader pkgRelReader(file, archive);
            ai_assert(mZipArchive->Exists(file.c_str()));

            IOStream *fileStream = mZipArchive->Open(file.c_str());

            ai_assert(fileStream != nullptr);

            std::string rootFile = ReadPackageRootRelationship(fileStream);
            if ( rootFile.size() > 0 && rootFile[ 0 ] == '/' ) {
                rootFile = rootFile.substr( 1 );
                if ( rootFile[ 0 ] == '/' ) {
                    // deal with zip-bug
                    rootFile = rootFile.substr( 1 );
                }
            }

            ASSIMP_LOG_DEBUG(rootFile);

            mZipArchive->Close(fileStream);

            mRootStream = mZipArchive->Open(rootFile.c_str());
            ai_assert( mRootStream != nullptr );
            if ( nullptr == mRootStream ) {
                throw DeadlyExportError( "Cannot open root-file in archive : " + rootFile );
            }

        } else if( file == D3MF::XmlTag::CONTENT_TYPES_ARCHIVE) {
            ASSIMP_LOG_WARN_F("Ignored file of unsupported type CONTENT_TYPES_ARCHIVES",file);
        } else {
            ASSIMP_LOG_WARN_F("Ignored file of unknown type: ",file);
        }

    }
}

D3MFOpcPackage::~D3MFOpcPackage() {
    mZipArchive->Close(mRootStream);
}

IOStream* D3MFOpcPackage::RootStream() const {
    return mRootStream;
}

static const std::string ModelRef = "3D/3dmodel.model";

bool D3MFOpcPackage::validate() {
    if ( nullptr == mRootStream || nullptr == mZipArchive ) {
        return false;
    }

    return mZipArchive->Exists( ModelRef.c_str() );
}

std::string D3MFOpcPackage::ReadPackageRootRelationship(IOStream* stream) {
    std::unique_ptr<CIrrXML_IOStreamReader> xmlStream(new CIrrXML_IOStreamReader(stream));
    std::unique_ptr<XmlReader> xml(irr::io::createIrrXMLReader(xmlStream.get()));

    OpcPackageRelationshipReader reader(xml.get());

    auto itr = std::find_if(reader.m_relationShips.begin(), reader.m_relationShips.end(), [](const OpcPackageRelationshipPtr& rel){
        return rel->type == XmlTag::PACKAGE_START_PART_RELATIONSHIP_TYPE;
    });

    if ( itr == reader.m_relationShips.end() ) {
        throw DeadlyImportError( "Cannot find " + XmlTag::PACKAGE_START_PART_RELATIONSHIP_TYPE );
    }

    return (*itr)->target;
}

} // Namespace D3MF
} // Namespace Assimp

#endif //ASSIMP_BUILD_NO_3MF_IMPORTER