File indexing completed on 2023-11-26 07:40:08

 /*
     This file is part of the syndication library
     SPDX-FileCopyrightText: 2006 Frank Osterfeld <osterfeld@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "parser.h"
 #include "constants.h"
 #include "content.h"
 #include "document.h"
 
 #include <documentsource.h>
 
 #include <QDomAttr>
 #include <QDomDocument>
 #include <QDomElement>
 #include <QDomNamedNodeMap>
 #include <QDomNode>
 #include <QDomNodeList>
 
 #include <QHash>
 #include <QString>
 
 namespace Syndication
 {
 namespace Atom
 {
 class SYNDICATION_NO_EXPORT Parser::ParserPrivate
 {
 public:
     static QDomDocument convertAtom0_3(const QDomDocument &document);
     static QDomNode convertNode(QDomDocument &doc, const QDomNode &node, const QHash<QString, QString> &nameMapper);
 };
 
 bool Parser::accept(const Syndication::DocumentSource &source) const
 {
     QDomElement root = source.asDomDocument().documentElement();
     return !root.isNull() && (root.namespaceURI() == atom1Namespace() || root.namespaceURI() == atom0_3Namespace());
 }
 
 Syndication::SpecificDocumentPtr Parser::parse(const Syndication::DocumentSource &source) const
 {
     QDomDocument doc = source.asDomDocument();
 
     if (doc.isNull()) {
         // if this is not atom, return an invalid feed document
         return FeedDocumentPtr(new FeedDocument());
     }
 
     QDomElement feed = doc.namedItem(QStringLiteral("feed")).toElement();
 
     bool feedValid = !feed.isNull();
 
     if (feedValid //
         && feed.attribute(QStringLiteral("version")) == QLatin1String("0.3")) {
         doc = ParserPrivate::convertAtom0_3(doc);
         feed = doc.namedItem(QStringLiteral("feed")).toElement();
     }
 
     feedValid = !feed.isNull() && feed.namespaceURI() == atom1Namespace();
 
     if (feedValid) {
         return FeedDocumentPtr(new FeedDocument(feed));
     }
 
     QDomElement entry = doc.namedItem(QStringLiteral("entry")).toElement();
     bool entryValid = !entry.isNull() && entry.namespaceURI() == atom1Namespace();
 
     if (entryValid) {
         return EntryDocumentPtr(new EntryDocument(feed));
     }
 
     // if this is not atom, return an invalid feed document
     return FeedDocumentPtr(new FeedDocument());
 }
 
 QString Parser::format() const
 {
     return QStringLiteral("atom");
 }
 
 QDomNode Parser::ParserPrivate::convertNode(QDomDocument &doc, const QDomNode &node, const QHash<QString, QString> &nameMapper)
 {
     if (!node.isElement()) {
         return node.cloneNode(true);
     }
 
     bool isAtom03Element = node.namespaceURI() == atom0_3Namespace();
     QDomElement oldEl = node.toElement();
 
     // use new namespace
     QString newNS = isAtom03Element ? atom1Namespace() : node.namespaceURI();
 
     QString newName = node.localName();
 
     // rename tags that are listed in the nameMapper
     if (isAtom03Element && nameMapper.contains(node.localName())) {
         newName = nameMapper[node.localName()];
     }
 
     QDomElement newEl = doc.createElementNS(newNS, newName);
 
     QDomNamedNodeMap attributes = oldEl.attributes();
 
     // copy over attributes
     const int numberOfAttributes(attributes.count());
     for (int i = 0; i < numberOfAttributes; ++i) {
         const QDomAttr attr = attributes.item(i).toAttr();
         if (attr.namespaceURI().isEmpty()) {
             newEl.setAttribute(attr.name(), attr.value());
         } else {
             newEl.setAttributeNS(attr.namespaceURI(), attr.name(), attr.value());
         }
     }
 
     /* clang-format off */
     bool isTextConstruct = newNS == atom1Namespace()
                            && (newName == QLatin1String("title")
                                || newName == QLatin1String("rights")
                                || newName == QLatin1String("subtitle")
                                || newName == QLatin1String("summary"));
     /* clang-format on */
 
     // for atom text constructs, map to new type schema (which only allows text, type, xhtml)
 
     if (isTextConstruct) {
         QString oldType = newEl.attribute(QStringLiteral("type"), QStringLiteral("text/plain"));
         QString newType;
 
         Content::Format format = Content::mapTypeToFormat(oldType);
         switch (format) {
         case Content::XML:
             newType = QStringLiteral("xhtml");
             break;
         case Content::EscapedHTML:
             newType = QStringLiteral("html");
             break;
         case Content::PlainText:
         case Content::Binary:
         default:
             newType = QStringLiteral("text");
         }
 
         newEl.setAttribute(QStringLiteral("type"), newType);
     } else {
         // for generator, rename the "url" attribute to "uri"
 
         bool isGenerator = newNS == atom1Namespace() && newName == QLatin1String("generator");
         if (isGenerator && newEl.hasAttribute(QStringLiteral("url"))) {
             newEl.setAttribute(QStringLiteral("uri"), newEl.attribute(QStringLiteral("url")));
         }
     }
 
     // process child nodes recursively and append them
     QDomNodeList children = node.childNodes();
     for (int i = 0; i < children.count(); ++i) {
         newEl.appendChild(convertNode(doc, children.item(i), nameMapper));
     }
 
     return newEl;
 }
 
 QDomDocument Parser::ParserPrivate::convertAtom0_3(const QDomDocument &doc03)
 {
     QDomDocument doc = doc03.cloneNode(false).toDocument();
 
     // these are the tags that were renamed in 1.0
     QHash<QString, QString> nameMapper;
     nameMapper.insert(QStringLiteral("issued"), QStringLiteral("published"));
     nameMapper.insert(QStringLiteral("modified"), QStringLiteral("updated"));
     nameMapper.insert(QStringLiteral("url"), QStringLiteral("uri"));
     nameMapper.insert(QStringLiteral("copyright"), QStringLiteral("rights"));
     nameMapper.insert(QStringLiteral("tagline"), QStringLiteral("subtitle"));
 
     const QDomNodeList children = doc03.childNodes();
 
     for (int i = 0; i < children.count(); ++i) {
         doc.appendChild(convertNode(doc, children.item(i), nameMapper));
     }
 
     return doc;
 }
 
 Parser::Parser()
     : d(nullptr)
 {
     Q_UNUSED(d) // silence -Wunused-private-field
 }
 
 Parser::~Parser()
 {
 }
 Parser::Parser(const Parser &other)
     : AbstractParser(other)
     , d(nullptr)
 {
 }
 Parser &Parser::operator=(const Parser & /*other*/)
 {
     return *this;
 }
 
 } // namespace Atom
 } // namespace Syndication