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#include "qhelpprojectdata_p.h"

#include <QtCore/QDir>

#include <QtCore/QFileInfo>

#include <QtCore/QStack>

#include <QtCore/QMap>

#include <QtCore/QRegExp>

#include <QtCore/QVariant>

#include <QtXml/QXmlStreamReader>

QT_BEGIN_NAMESPACE

class QHelpProjectDataPrivate : public QXmlStreamReader

{

public:

    void readData(const QByteArray &contents);

    QString virtualFolder;

    QString namespaceName;

    QString rootPath;

    QStringList fileList;

    QList<QHelpDataCustomFilter> customFilterList;

    QList<QHelpDataFilterSection> filterSectionList;

    QMap<QString, QVariant> metaData;

    QString errorMsg;

private:

    void readProject();

    void readCustomFilter();

    void readFilterSection();

    void readTOC();

    void readKeywords();

    void readFiles();

    void raiseUnknownTokenError();

    void addMatchingFiles(const QString &pattern);

    QMap<QString, QStringList> dirEntriesCache;

};

void QHelpProjectDataPrivate::raiseUnknownTokenError()

{

    raiseError(QObject::tr("Unknown token."));

}

void QHelpProjectDataPrivate::readData(const QByteArray &contents)

{

    addData(contents);

    while (!atEnd()) {

        readNext();

        if (isStartElement()) {

            if (name() == QLatin1String("QtHelpProject")

                && attributes().value(QLatin1String("version")) == QLatin1String("1.0"))

                readProject();

            else

                raiseError(QObject::tr("Unknown token. Expected \"QtHelpProject\"!"));

        }

    }

    if (hasError()) {

        raiseError(QObject::tr("Error in line %1: %2").arg(lineNumber())

            .arg(errorString()));

    }

}

void QHelpProjectDataPrivate::readProject()

{

    while (!atEnd()) {

        readNext();

        if (isStartElement()) {

            if (name() == QLatin1String("virtualFolder")) {

                virtualFolder = readElementText();

                if (virtualFolder.contains(QLatin1String("/")))

                    raiseError(QObject::tr("A virtual folder must not contain a \'/\' character!"));

            } else if (name() == QLatin1String("namespace")) {

                namespaceName = readElementText();

                if (namespaceName.contains(QLatin1String("/")))

                    raiseError(QObject::tr("A namespace must not contain a \'/\' character!"));

            } else if (name() == QLatin1String("customFilter")) {

                readCustomFilter();

            } else if (name() == QLatin1String("filterSection")) {

                readFilterSection();

            } else if (name() == QLatin1String("metaData")) {

                QString n = attributes().value(QLatin1String("name")).toString();

                if (!metaData.contains(n))

                    metaData[n] = attributes().value(QLatin1String("value")).toString();

                else

                    metaData.insert(n, attributes().value(QLatin1String("value")).toString());

            } else {

                raiseUnknownTokenError();

            }

        } else if (isEndElement() && name() == QLatin1String("QtHelpProject")) {

            if (namespaceName.isEmpty())

                raiseError(QObject::tr("Missing namespace in QtHelpProject."));

            else if (virtualFolder.isEmpty())

                raiseError(QObject::tr("Missing virtual folder in QtHelpProject"));

            break;

        }

    }

}

void QHelpProjectDataPrivate::readCustomFilter()

{

    QHelpDataCustomFilter filter;

    filter.name = attributes().value(QLatin1String("name")).toString();

    while (!atEnd()) {

        readNext();

        if (isStartElement()) {

            if (name() == QLatin1String("filterAttribute"))

                filter.filterAttributes.append(readElementText());

            else

                raiseUnknownTokenError();

        } else if (isEndElement() && name() == QLatin1String("customFilter")) {

            break;

        }

    }

    customFilterList.append(filter);

}

void QHelpProjectDataPrivate::readFilterSection()

{

    filterSectionList.append(QHelpDataFilterSection());

    while (!atEnd()) {

        readNext();

        if (isStartElement()) {

            if (name() == QLatin1String("filterAttribute"))

                filterSectionList.last().addFilterAttribute(readElementText());

            else if (name() == QLatin1String("toc"))

                readTOC();

            else if (name() == QLatin1String("keywords"))

                readKeywords();

            else if (name() == QLatin1String("files"))

                readFiles();

            else

                raiseUnknownTokenError();

        } else if (isEndElement() && name() == QLatin1String("filterSection")) {

            break;

        }

    }

}

void QHelpProjectDataPrivate::readTOC()

{

    QStack<QHelpDataContentItem*> contentStack;

    QHelpDataContentItem *itm = 0;

    while (!atEnd()) {

        readNext();

        if (isStartElement()) {

            if (name() == QLatin1String("section")) {

                QString title = attributes().value(QLatin1String("title")).toString();

                QString ref = attributes().value(QLatin1String("ref")).toString();

                if (contentStack.isEmpty()) {

                    itm = new QHelpDataContentItem(0, title, ref);

                    filterSectionList.last().addContent(itm);

                } else {

                    itm = new QHelpDataContentItem(contentStack.top(), title, ref);

                }

                contentStack.push(itm);

            } else {

                raiseUnknownTokenError();

            }

        } else if (isEndElement()) {

            if (name() == QLatin1String("section")) {

                contentStack.pop();

                continue;

            } else if (name() == QLatin1String("toc") && contentStack.isEmpty()) {

                break;

            } else {

                raiseUnknownTokenError();

            }

        }

    }

}

void QHelpProjectDataPrivate::readKeywords()

{

    while (!atEnd()) {

        readNext();

        if (isStartElement()) {

            if (name() == QLatin1String("keyword")) {

                if (attributes().value(QLatin1String("ref")).toString().isEmpty()

                    || (attributes().value(QLatin1String("name")).toString().isEmpty()

                    && attributes().value(QLatin1String("id")).toString().isEmpty()))

                    raiseError(QObject::tr("Missing attribute in keyword at line %1.")

                        .arg(lineNumber()));

                filterSectionList.last().addIndex(

                    QHelpDataIndexItem(attributes().value(QLatin1String("name")).toString(),

                        attributes().value(QLatin1String("id")).toString(),

                        attributes().value(QLatin1String("ref")).toString()));

            } else {

                raiseUnknownTokenError();

            }

        } else if (isEndElement()) {

            if (name() == QLatin1String("keyword"))

                continue;

            else if (name() == QLatin1String("keywords"))

                break;

            else

                raiseUnknownTokenError();

        }

    }

}

void QHelpProjectDataPrivate::readFiles()

{

    while (!atEnd()) {

        readNext();

        if (isStartElement()) {

            if (name() == QLatin1String("file"))

                addMatchingFiles(readElementText());

            else

                raiseUnknownTokenError();

        } else if (isEndElement()) {

            if (name() == QLatin1String("file"))

                continue;

            else if (name() == QLatin1String("files"))

                break;

            else

                raiseUnknownTokenError();

        }

    }

}

// Expand file pattern and add matches into list. If the pattern does not match

// any files, insert the pattern itself so the QHelpGenerator will emit a

// meaningful warning later.

void QHelpProjectDataPrivate::addMatchingFiles(const QString &pattern)

{

    // The pattern matching is expensive, so we skip it if no

    // wildcard symbols occur in the string.

    if (!pattern.contains('?') && !pattern.contains('*')

        && !pattern.contains('[') && !pattern.contains(']')) {

        filterSectionList.last().addFile(pattern);

        return;

    }

    QFileInfo fileInfo(rootPath + '/' + pattern);

    const QDir &dir = fileInfo.dir();

    const QString &path = dir.canonicalPath();

    // QDir::entryList() is expensive, so we cache the results.

    QMap<QString, QStringList>::ConstIterator it = dirEntriesCache.find(path);

    const QStringList &entries = it != dirEntriesCache.constEnd() ?

                                 it.value() : dir.entryList(QDir::Files);

    if (it == dirEntriesCache.constEnd())

        dirEntriesCache.insert(path, entries);

    bool matchFound = false;

#ifdef Q_OS_WIN

    Qt::CaseSensitivity cs = Qt::CaseInsensitive;

#else

    Qt::CaseSensitivity cs = Qt::CaseSensitive;

#endif

    QRegExp regExp(fileInfo.fileName(), cs, QRegExp::Wildcard);

    foreach (const QString &file, entries) {

        if (regExp.exactMatch(file)) {

            matchFound = true;

            filterSectionList.last().

                addFile(QFileInfo(pattern).dir().path() + '/' + file);

        }

    }

    if (!matchFound)

        filterSectionList.last().addFile(pattern);

}

/*!

    \internal

    \class QHelpProjectData

    \since 4.4

    \brief The QHelpProjectData class stores all information found

    in a Qt help project file.

    The structure is filled with data by calling readData(). The

    specified file has to have the Qt help project file format in

    order to be read successfully. Possible reading errors can be

    retrieved by calling errorMessage().

*/

/*!

    Constructs a Qt help project data structure.

*/

QHelpProjectData::QHelpProjectData()

{

    d = new QHelpProjectDataPrivate;

}

/*!

    Destroys the help project data.

*/

QHelpProjectData::~QHelpProjectData()

{

    delete d;

}

/*!

    Reads the file \a fileName and stores the help data. The file has to

    have the Qt help project file format. Returns true if the file

    was successfully read, otherwise false.

    \sa errorMessage()

*/

bool QHelpProjectData::readData(const QString &fileName)

{

    d->rootPath = QFileInfo(fileName).absolutePath();

    QFile file(fileName);

    if (!file.open(QIODevice::ReadOnly)) {

        d->errorMsg = QObject::tr("The input file %1 could not be opened!")

            .arg(fileName);

        return false;

    }

    d->readData(file.readAll());

    return !d->hasError();

}

/*!

    Returns an error message if the reading of the Qt help project

    file failed. Otherwise, an empty QString is returned.

    \sa readData()

*/

QString QHelpProjectData::errorMessage() const

{

    if (d->hasError())

        return d->errorString();

    return d->errorMsg;

}

/*!

    \internal

*/

QString QHelpProjectData::namespaceName() const

{

    return d->namespaceName;

}

/*!

    \internal

*/

QString QHelpProjectData::virtualFolder() const

{

    return d->virtualFolder;

}

/*!

    \internal

*/

QList<QHelpDataCustomFilter> QHelpProjectData::customFilters() const

{

    return d->customFilterList;

}

/*!

    \internal

*/

QList<QHelpDataFilterSection> QHelpProjectData::filterSections() const

{

    return d->filterSectionList;

}

/*!

    \internal

*/

QMap<QString, QVariant> QHelpProjectData::metaData() const

{

    return d->metaData;

}

/*!

    \internal

*/

QString QHelpProjectData::rootPath() const

{

    return d->rootPath;

}

QT_END_NAMESPACE