File indexing completed on 2024-05-12 05:10:13

 /***************************************************************************
     Copyright (C) 2003-2009 Robby Stephenson <robby@periapsis.org>
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *   This program is free software; you can redistribute it and/or         *
  *   modify it under the terms of the GNU General Public License as        *
  *   published by the Free Software Foundation; either version 2 of        *
  *   the License or (at your option) version 3 or any later version        *
  *   accepted by the membership of KDE e.V. (or its successor approved     *
  *   by the membership of KDE e.V.), which shall act as a proxy            *
  *   defined in Section 14 of version 3 of the license.                    *
  *                                                                         *
  *   This program is distributed in the hope that it will be useful,       *
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  *                                                                         *
  ***************************************************************************/
 
 #include "tellicoxmlexporter.h"
 #include "tellico_xml.h"
 #include "../utils/bibtexhandler.h" // needed for cleaning text
 #include "../utils/string_utils.h"
 #include "../utils/urlfieldlogic.h"
 #include "../entrygroup.h"
 #include "../collections/bibtexcollection.h"
 #include "../images/imagefactory.h"
 #include "../images/image.h"
 #include "../images/imageinfo.h"
 #include "../core/filehandler.h"
 #include "../document.h"
 #include "../fieldformat.h"
 #include "../models/entrysortmodel.h"
 #include "../models/modelmanager.h"
 #include "../models/modeliterator.h"
 #include "../models/models.h"
 #include "../tellico_debug.h"
 
 #include <KLocalizedString>
 #include <KConfigGroup>
 
 #include <QDir>
 #include <QGroupBox>
 #include <QCheckBox>
 #include <QDomDocument>
 #include <QTextCodec>
 #include <QVBoxLayout>
 
 #include <algorithm>
 
 using namespace Tellico;
 using Tellico::Export::TellicoXMLExporter;
 
 TellicoXMLExporter::TellicoXMLExporter(Tellico::Data::CollPtr coll) : Exporter(coll),
       m_includeImages(false), m_includeGroups(false), m_widget(nullptr), m_checkIncludeImages(nullptr) {
   setOptions(options() | Export::ExportImages | Export::ExportImageSize); // not included by default
 }
 
 TellicoXMLExporter::~TellicoXMLExporter() {
 }
 
 QString TellicoXMLExporter::formatString() const {
   return QStringLiteral("XML");
 }
 
 QString TellicoXMLExporter::fileFilter() const {
   return i18n("XML Files") + QLatin1String(" (*.xml)") + QLatin1String(";;") + i18n("All Files") + QLatin1String(" (*)");
 }
 
 bool TellicoXMLExporter::exec() {
   QDomDocument doc = exportXML();
   if(doc.isNull()) {
     return false;
   }
   return FileHandler::writeTextURL(url(), doc.toString(),
                                    options() & ExportUTF8,
                                    options() & Export::ExportForce);
 }
 
 QString TellicoXMLExporter::text() const {
   return exportXML().toString();
 }
 
 QDomDocument TellicoXMLExporter::exportXML() const {
   int exportVersion = XML::syntaxVersion;
 
   if(exportVersion == 12 && !version12Needed()) {
     exportVersion = 11;
   }
 
   QDomImplementation impl;
   // Bug 443845 - but do not just silent drop the invalid characters
   // since that drops emojis and unicode points with surrogate encoding
   // instead Tellico::removeControlCodes is used everywhere that
   // QDomDocument::createTextNode() is called
 //  impl.setInvalidDataPolicy(QDomImplementation::DropInvalidChars);
   QDomDocumentType doctype = impl.createDocumentType(QStringLiteral("tellico"),
                                                      XML::pubTellico(exportVersion),
                                                      XML::dtdTellico(exportVersion));
   //default namespace
   const QString& ns = XML::nsTellico;
 
   QDomDocument dom = impl.createDocument(ns, QStringLiteral("tellico"), doctype);
 
   // root tellico element
   QDomElement root = dom.documentElement();
 
   QString encodeStr = QStringLiteral("version=\"1.0\" encoding=\"");
   if(options() & Export::ExportUTF8) {
     encodeStr += QLatin1String("UTF-8");
   } else {
     encodeStr += QLatin1String(QTextCodec::codecForLocale()->name());
   }
   encodeStr += QLatin1Char('"');
 
   // createDocument creates a root node, insert the processing instruction before it
   dom.insertBefore(dom.createProcessingInstruction(QStringLiteral("xml"), encodeStr), root);
 
   root.setAttribute(QStringLiteral("syntaxVersion"), exportVersion);
 
   FieldFormat::Request format = (options() & Export::ExportFormatted ?
                                                 FieldFormat::ForceFormat :
                                                 FieldFormat::AsIsFormat);
 
   exportCollectionXML(dom, root, format);
 
   // clear image list
   m_images.clear();
 
   return dom;
 }
 
 void TellicoXMLExporter::exportCollectionXML(QDomDocument& dom_, QDomElement& parent_, int format_) const {
   Data::CollPtr coll = collection();
   if(!coll) {
     myWarning() << "no collection pointer!";
     return;
   }
 
   QDomElement collElem = dom_.createElement(QStringLiteral("collection"));
   collElem.setAttribute(QStringLiteral("type"), coll->type());
   collElem.setAttribute(QStringLiteral("title"), coll->title());
 
   QDomElement fieldsElem = dom_.createElement(QStringLiteral("fields"));
   collElem.appendChild(fieldsElem);
 
   foreach(Data::FieldPtr field, fields()) {
     exportFieldXML(dom_, fieldsElem, field);
   }
 
   if(coll->type() == Data::Collection::Bibtex) {
     const Data::BibtexCollection* c = static_cast<const Data::BibtexCollection*>(coll.data());
     if(!c->preamble().isEmpty()) {
       QDomElement preElem = dom_.createElement(QStringLiteral("bibtex-preamble"));
       preElem.appendChild(dom_.createTextNode(removeControlCodes(c->preamble())));
       collElem.appendChild(preElem);
     }
 
     QDomElement macrosElem = dom_.createElement(QStringLiteral("macros"));
     for(StringMap::ConstIterator macroIt = c->macroList().constBegin(); macroIt != c->macroList().constEnd(); ++macroIt) {
       if(!macroIt.value().isEmpty()) {
         QDomElement macroElem = dom_.createElement(QStringLiteral("macro"));
         macroElem.setAttribute(QStringLiteral("name"), macroIt.key());
         macroElem.appendChild(dom_.createTextNode(removeControlCodes(macroIt.value())));
         macrosElem.appendChild(macroElem);
       }
     }
     if(macrosElem.childNodes().count() > 0) {
       collElem.appendChild(macrosElem);
     }
   }
 
   foreach(Data::EntryPtr entry, entries()) {
     exportEntryXML(dom_, collElem, entry, format_);
   }
 
   if(!m_images.isEmpty() && (options() & Export::ExportImages)) {
     QDomElement imgsElem = dom_.createElement(QStringLiteral("images"));
     const QStringList imageIds = m_images.values();
     foreach(const QString& id, m_images) {
       exportImageXML(dom_, imgsElem, id);
     }
     if(imgsElem.hasChildNodes()) {
       collElem.appendChild(imgsElem);
     }
   }
 
   if(m_includeGroups) {
     exportGroupXML(dom_, collElem);
   }
 
   parent_.appendChild(collElem);
 
   // the borrowers and filters are in the tellico object, not the collection
   if(options() & Export::ExportComplete) {
     QDomElement bElem = dom_.createElement(QStringLiteral("borrowers"));
     foreach(Data::BorrowerPtr borrower, coll->borrowers()) {
       exportBorrowerXML(dom_, bElem, borrower);
     }
     if(bElem.hasChildNodes()) {
       parent_.appendChild(bElem);
     }
 
     QDomElement fElem = dom_.createElement(QStringLiteral("filters"));
     foreach(FilterPtr filter, coll->filters()) {
       exportFilterXML(dom_, fElem, filter);
     }
     if(fElem.hasChildNodes()) {
       parent_.appendChild(fElem);
     }
   }
 }
 
 void TellicoXMLExporter::exportFieldXML(QDomDocument& dom_, QDomElement& parent_, Tellico::Data::FieldPtr field_) const {
   QDomElement elem = dom_.createElement(QStringLiteral("field"));
 
   elem.setAttribute(QStringLiteral("name"),     field_->name());
   elem.setAttribute(QStringLiteral("title"),    field_->title());
   elem.setAttribute(QStringLiteral("category"), field_->category());
   elem.setAttribute(QStringLiteral("type"),     field_->type());
   elem.setAttribute(QStringLiteral("flags"),    field_->flags());
   elem.setAttribute(QStringLiteral("format"),   field_->formatType());
 
   if(field_->type() == Data::Field::Choice) {
     elem.setAttribute(QStringLiteral("allowed"), field_->allowed().join(QLatin1String(";")));
   }
 
   // only save description if it's not equal to title, which is the default
   // title is never empty, so this indirectly checks for empty descriptions
   if(field_->description() != field_->title()) {
     elem.setAttribute(QStringLiteral("description"), field_->description());
   }
 
   for(StringMap::ConstIterator it = field_->propertyList().begin(); it != field_->propertyList().end(); ++it) {
     if(it.value().isEmpty()) {
       continue;
     }
     QDomElement e = dom_.createElement(QStringLiteral("prop"));
     e.setAttribute(QStringLiteral("name"), it.key());
     e.appendChild(dom_.createTextNode(removeControlCodes(it.value())));
     elem.appendChild(e);
   }
 
   parent_.appendChild(elem);
 }
 
 void TellicoXMLExporter::exportEntryXML(QDomDocument& dom_, QDomElement& parent_, Tellico::Data::EntryPtr entry_, int format_) const {
   QDomElement entryElem = dom_.createElement(QStringLiteral("entry"));
   entryElem.setAttribute(QStringLiteral("id"), QString::number(entry_->id()));
 
   // iterate through every field for the entry
   foreach(Data::FieldPtr fIt, fields()) {
     QString fieldName = fIt->name();
 
     // Date fields are special, don't format in export
     QString fieldValue = (format_ == FieldFormat::ForceFormat && fIt->type() != Data::Field::Date) ?
                                                            entry_->formattedField(fieldName, FieldFormat::ForceFormat) :
                                                            entry_->field(fieldName);
     if(options() & ExportClean) {
       BibtexHandler::cleanText(fieldValue);
     }
 
     // if empty, then no field element is added and just continue
     if(fieldValue.isEmpty()) {
       continue;
     }
 
     // optionally, verify images exist
     if(fIt->type() == Data::Field::Image && (options() & Export::ExportVerifyImages)) {
       if(!ImageFactory::validImage(fieldValue)) {
         myDebug() << "entry: " << entry_->title();
         myDebug() << "skipping image: " << fieldValue;
         continue;
       }
     }
 
     if(fIt->type() == Data::Field::Table) {
       // who cares about grammar, just add an 's' to the name
       QDomElement parElem = dom_.createElement(fieldName + QLatin1Char('s'));
       entryElem.appendChild(parElem);
 
       bool ok;
       int ncols = Tellico::toUInt(fIt->property(QStringLiteral("columns")), &ok);
       if(!ok || ncols < 1) {
         ncols = 1;
       }
       foreach(const QString& rowValue, FieldFormat::splitTable(fieldValue)) {
         QDomElement fieldElem = dom_.createElement(fieldName);
         parElem.appendChild(fieldElem);
 
         QStringList columnValues = FieldFormat::splitRow(rowValue);
         if(ncols < columnValues.count()) {
           // need to combine all the last values, from ncols-1 to end
           QString lastValue = QStringList(columnValues.mid(ncols-1)).join(FieldFormat::columnDelimiterString());
           columnValues = columnValues.mid(0, ncols);
           columnValues.replace(ncols-1, lastValue);
         }
         for(int col = 0; col < columnValues.count(); ++col) {
           QDomElement elem = dom_.createElement(QStringLiteral("column"));
           elem.appendChild(dom_.createTextNode(removeControlCodes(columnValues.at(col))));
           fieldElem.appendChild(elem);
         }
       }
       continue;
     }
 
     if(fIt->hasFlag(Data::Field::AllowMultiple)) {
       // if multiple versions are allowed, split them into separate elements
       // parent element if field contains multiple values, child of entryElem
       // who cares about grammar, just add an QLatin1Char('s') to the name
       QDomElement parElem = dom_.createElement(fieldName + QLatin1Char('s'));
       entryElem.appendChild(parElem);
 
       // the space after the semi-colon is enforced when the field is set for the entry
       QStringList fields = FieldFormat::splitValue(fieldValue);
       for(QStringList::ConstIterator it = fields.constBegin(); it != fields.constEnd(); ++it) {
         // element for field value, child of either entryElem or ParentElem
         QDomElement fieldElem = dom_.createElement(fieldName);
         fieldElem.appendChild(dom_.createTextNode(removeControlCodes(*it)));
         parElem.appendChild(fieldElem);
       }
     } else {
       QDomElement fieldElem = dom_.createElement(fieldName);
       entryElem.appendChild(fieldElem);
       // Date fields get special treatment
       if(fIt->type() == Data::Field::Date) {
         // as of Tellico in KF5 (3.0), just forget about the calendar attribute for the moment, always use gregorian
         fieldElem.setAttribute(QStringLiteral("calendar"), QStringLiteral("gregorian"));
 #if (QT_VERSION < QT_VERSION_CHECK(5, 14, 0))
         QStringList s = fieldValue.split(QLatin1Char('-'), QString::KeepEmptyParts);
 #else
         QStringList s = fieldValue.split(QLatin1Char('-'), Qt::KeepEmptyParts);
 #endif
         if(s.count() > 0 && !s[0].isEmpty()) {
           QDomElement e = dom_.createElement(QStringLiteral("year"));
           fieldElem.appendChild(e);
           e.appendChild(dom_.createTextNode(s[0]));
         }
         if(s.count() > 1 && !s[1].isEmpty()) {
           QDomElement e = dom_.createElement(QStringLiteral("month"));
           fieldElem.appendChild(e);
           e.appendChild(dom_.createTextNode(s[1]));
         }
         if(s.count() > 2 && !s[2].isEmpty()) {
           QDomElement e = dom_.createElement(QStringLiteral("day"));
           fieldElem.appendChild(e);
           e.appendChild(dom_.createTextNode(s[2]));
         }
       } else if(fIt->type() == Data::Field::URL &&
                 fIt->property(QStringLiteral("relative")) == QLatin1String("true")) {
         // if a relative URL and url() is not empty, change the value!
         QUrl old_url = Data::Document::self()->URL().resolved(QUrl(fieldValue));
         if(options() & Export::ExportAbsoluteLinks) {
           fieldElem.appendChild(dom_.createTextNode(old_url.url()));
         } else if(!url().isEmpty()) {
           QUrl new_url(url());
           if(new_url.scheme() == old_url.scheme() &&
              new_url.host() == old_url.host()) {
             // calculate a new relative url
             UrlFieldLogic logic;
             logic.setRelative(true);
             logic.setBaseUrl(url());
             fieldElem.appendChild(dom_.createTextNode(logic.urlText(old_url)));
           } else {
             // use the absolute url here
             fieldElem.appendChild(dom_.createTextNode(old_url.url()));
           }
         } else {
           fieldElem.appendChild(dom_.createTextNode(removeControlCodes(fieldValue)));
         }
       } else {
         fieldElem.appendChild(dom_.createTextNode(removeControlCodes(fieldValue)));
       }
     }
 
     if(fIt->type() == Data::Field::Image) {
       // possible to have more than one entry with the same image
       // only want to include it in the output xml once
       m_images.add(fieldValue);
     }
   } // end field loop
 
   parent_.appendChild(entryElem);
 }
 
 void TellicoXMLExporter::exportImageXML(QDomDocument& dom_, QDomElement& parent_, const QString& id_) const {
   if(id_.isEmpty()) {
     myDebug() << "empty image!";
     return;
   }
 //  myLog() << "id = " << id_;
 
   QDomElement imgElem = dom_.createElement(QStringLiteral("image"));
   if(m_includeImages) {
     const Data::Image& img = ImageFactory::imageById(id_);
     if(img.isNull()) {
       return;
     }
     imgElem.setAttribute(QStringLiteral("format"), QLatin1String(img.format()));
     imgElem.setAttribute(QStringLiteral("id"),     QString(img.id()));
     imgElem.setAttribute(QStringLiteral("width"),  img.width());
     imgElem.setAttribute(QStringLiteral("height"), img.height());
     if(img.linkOnly()) {
       imgElem.setAttribute(QStringLiteral("link"), QStringLiteral("true"));
     }
     QByteArray imgText = img.byteArray().toBase64();
     imgElem.appendChild(dom_.createTextNode(QLatin1String(imgText)));
   } else {
     const Data::ImageInfo& info = ImageFactory::imageInfo(id_);
     if(info.isNull()) {
       return;
     }
     imgElem.setAttribute(QStringLiteral("format"), QLatin1String(info.format));
     imgElem.setAttribute(QStringLiteral("id"),     QString(info.id));
     // only load the images to read the size if necessary
     const bool loadImageIfNecessary = options() & Export::ExportImageSize;
     imgElem.setAttribute(QStringLiteral("width"),  info.width(loadImageIfNecessary));
     imgElem.setAttribute(QStringLiteral("height"), info.height(loadImageIfNecessary));
     if(info.linkOnly) {
       imgElem.setAttribute(QStringLiteral("link"), QStringLiteral("true"));
     }
   }
   parent_.appendChild(imgElem);
 }
 
 void TellicoXMLExporter::exportGroupXML(QDomDocument& dom_, QDomElement& parent_) const {
   Data::EntryList vec = entries();
   bool exportAll = collection()->entries().count() == vec.count();
   // iterate over each group, which are the first children
   for(ModelIterator gIt(ModelManager::self()->groupModel()); gIt.group(); ++gIt) {
     if(gIt.group()->isEmpty()) {
       continue;
     }
     QDomElement groupElem = dom_.createElement(QStringLiteral("group"));
     groupElem.setAttribute(QStringLiteral("title"), gIt.group()->groupName());
     // now iterate over all entry items in the group
     Data::EntryList sorted = sortEntries(*gIt.group());
     foreach(Data::EntryPtr eIt, sorted) {
       if(!exportAll && vec.indexOf(eIt) == -1) {
         continue;
       }
       QDomElement entryRefElem = dom_.createElement(QStringLiteral("entryRef"));
       entryRefElem.setAttribute(QStringLiteral("id"), QString::number(eIt->id()));
       groupElem.appendChild(entryRefElem);
     }
     if(groupElem.hasChildNodes()) {
       parent_.appendChild(groupElem);
     }
   }
 }
 
 void TellicoXMLExporter::exportFilterXML(QDomDocument& dom_, QDomElement& parent_, Tellico::FilterPtr filter_) const {
   QDomElement filterElem = dom_.createElement(QStringLiteral("filter"));
   filterElem.setAttribute(QStringLiteral("name"), filter_->name());
 
   QString match = (filter_->op() == Filter::MatchAll) ? QStringLiteral("all") : QStringLiteral("any");
   filterElem.setAttribute(QStringLiteral("match"), match);
 
   foreach(FilterRule* rule, *filter_) {
     QDomElement ruleElem = dom_.createElement(QStringLiteral("rule"));
     ruleElem.setAttribute(QStringLiteral("field"), rule->fieldName());
     ruleElem.setAttribute(QStringLiteral("pattern"), rule->pattern());
     switch(rule->function()) {
       case FilterRule::FuncContains:
         ruleElem.setAttribute(QStringLiteral("function"), QStringLiteral("contains"));
         break;
       case FilterRule::FuncNotContains:
         ruleElem.setAttribute(QStringLiteral("function"), QStringLiteral("notcontains"));
         break;
       case FilterRule::FuncEquals:
         ruleElem.setAttribute(QStringLiteral("function"), QStringLiteral("equals"));
         break;
       case FilterRule::FuncNotEquals:
         ruleElem.setAttribute(QStringLiteral("function"), QStringLiteral("notequals"));
         break;
       case FilterRule::FuncRegExp:
         ruleElem.setAttribute(QStringLiteral("function"), QStringLiteral("regexp"));
         break;
       case FilterRule::FuncNotRegExp:
         ruleElem.setAttribute(QStringLiteral("function"), QStringLiteral("notregexp"));
         break;
       case FilterRule::FuncBefore:
         ruleElem.setAttribute(QStringLiteral("function"), QStringLiteral("before"));
         break;
       case FilterRule::FuncAfter:
         ruleElem.setAttribute(QStringLiteral("function"), QStringLiteral("after"));
         break;
       case FilterRule::FuncGreater:
         ruleElem.setAttribute(QStringLiteral("function"), QStringLiteral("greaterthan"));
         break;
       case FilterRule::FuncLess:
         ruleElem.setAttribute(QStringLiteral("function"), QStringLiteral("lessthan"));
         break;
       /* If anything is updated here, be sure to update xmlstatehandler */
     }
     filterElem.appendChild(ruleElem);
   }
 
   parent_.appendChild(filterElem);
 }
 
 void TellicoXMLExporter::exportBorrowerXML(QDomDocument& dom_, QDomElement& parent_,
                                            Tellico::Data::BorrowerPtr borrower_) const {
   if(borrower_->isEmpty()) {
     return;
   }
 
   QDomElement bElem = dom_.createElement(QStringLiteral("borrower"));
   parent_.appendChild(bElem);
 
   bElem.setAttribute(QStringLiteral("name"), borrower_->name());
   bElem.setAttribute(QStringLiteral("uid"), borrower_->uid());
 
   foreach(Data::LoanPtr it, borrower_->loans()) {
     QDomElement lElem = dom_.createElement(QStringLiteral("loan"));
     bElem.appendChild(lElem);
 
     lElem.setAttribute(QStringLiteral("uid"), it->uid());
     lElem.setAttribute(QStringLiteral("entryRef"), QString::number(it->entry()->id()));
     lElem.setAttribute(QStringLiteral("loanDate"), it->loanDate().toString(Qt::ISODate));
     lElem.setAttribute(QStringLiteral("dueDate"), it->dueDate().toString(Qt::ISODate));
     if(it->inCalendar()) {
       lElem.setAttribute(QStringLiteral("calendar"), QStringLiteral("true"));
     }
 
     lElem.appendChild(dom_.createTextNode(it->note()));
   }
 }
 
 QWidget* TellicoXMLExporter::widget(QWidget* parent_) {
   if(m_widget) {
     return m_widget;
   }
 
   m_widget = new QWidget(parent_);
   QVBoxLayout* l = new QVBoxLayout(m_widget);
 
   QGroupBox* gbox = new QGroupBox(i18n("Tellico XML Options"), m_widget);
   QVBoxLayout* vlay = new QVBoxLayout(gbox);
 
   m_checkIncludeImages = new QCheckBox(i18n("Include images in XML document"), gbox);
   m_checkIncludeImages->setChecked(m_includeImages);
   m_checkIncludeImages->setWhatsThis(i18n("If checked, the images in the document will be included "
                                           "in the XML stream as base64 encoded elements."));
 
   vlay->addWidget(m_checkIncludeImages);
 
   l->addWidget(gbox);
   l->addStretch(1);
   return m_widget;
 }
 
 void TellicoXMLExporter::readOptions(KSharedConfigPtr config_) {
   KConfigGroup group(config_, QStringLiteral("ExportOptions - %1").arg(formatString()));
   m_includeImages = group.readEntry("Include Images", m_includeImages);
 }
 
 void TellicoXMLExporter::saveOptions(KSharedConfigPtr config_) {
   m_includeImages = m_checkIncludeImages->isChecked();
 
   KConfigGroup group(config_, QStringLiteral("ExportOptions - %1").arg(formatString()));
   group.writeEntry("Include Images", m_includeImages);
 }
 
 Tellico::Data::EntryList TellicoXMLExporter::sortEntries(const Data::EntryList& entries_) const {
   Data::EntryList sorted = entries_;
 
   EntrySortModel* model = static_cast<EntrySortModel*>(ModelManager::self()->entryModel());
   // have to go in reverse for sorting
   Data::FieldList fields;
   Data::FieldPtr field;
   if(model->tertiarySortColumn() > -1) {
     field = model->headerData(model->tertiarySortColumn(), Qt::Horizontal, FieldPtrRole).value<Data::FieldPtr>();
     if(field) {
       fields << field;
     } else {
       myDebug() << "no field for tertiary sort column" << model->tertiarySortColumn();
     }
   }
   if(model->secondarySortColumn() > -1) {
     field = model->headerData(model->secondarySortColumn(), Qt::Horizontal, FieldPtrRole).value<Data::FieldPtr>();
     if(field) {
       fields << field;
     } else {
       myDebug() << "no field for secondary sort column" << model->secondarySortColumn();
     }
   }
   if(model->sortColumn() > -1) {
     field = model->headerData(model->sortColumn(), Qt::Horizontal, FieldPtrRole).value<Data::FieldPtr>();
     if(field) {
       fields << field;
     } else {
       myDebug() << "no field for primary sort column" << model->sortColumn();
     }
   }
 
   // now sort
   foreach(Data::FieldPtr field, fields) {
     std::sort(sorted.begin(), sorted.end(), Data::EntryCmp(field->name()));
   }
 
   return sorted;
 }
 
 bool TellicoXMLExporter::version12Needed() const {
   // version 12 is only necessary if the new filter rules are used
   foreach(FilterPtr filter, collection()->filters()) {
     foreach(FilterRule* rule, *filter) {
       if(rule->function() == FilterRule::FuncBefore ||
          rule->function() == FilterRule::FuncAfter ||
          rule->function() == FilterRule::FuncGreater ||
          rule->function() == FilterRule::FuncLess) {
         return true;
       }
     }
   }
   return false;
 }