/daten/ahuesgen/projects/vhist/code/vhistlib/include/unvhistlib/vhistparser.h

/* $HEADERS
 $Id: vhistparser.h 2792 2013-05-06 11:25:27Z michael $
 */

#ifndef VHISTPARSER_INCLUDED
#define VHISTPARSER_INCLUDED

#include "../shared/misc_defines.h"

#include "tags.h"

#include "fileiterator.h"
//#include "../shared/maybe.tpl"
#include "../shared/logsource.h"

#include <QObject>
#include <QPair>
#include <QSharedPointer>
#include <QRegExp>

class QString;

namespace vhist
{


enum ParseMode
{
    MODE_CORRECT = 0,
    MODE_ROBUST = 1
};

typedef QSharedPointer<SectionTag> MaybeSectionTag;
typedef QSharedPointer<FileTag> MaybeFileTag;
typedef QSharedPointer<QByteArray> MaybeBytes;


// <compressed sum, uncompressed sum>
typedef QPair<QString, QString> MD5Sums;


void VHIST_EXTERN printSectionTag(const SectionTag& section);
void VHIST_EXTERN printFileTag(const FileTag& file);


class VHIST_EXTERN VhistParser : public LogSource
{
    Q_OBJECT
    
    public: // construction, destruction and assignment
        VhistParser(ParseMode mode = MODE_ROBUST, QObject *pLogTarget = NULL);
        virtual ~VhistParser();
    
    public:
        bool open(const QString& filename);
        
        SectionTagList getSections();
        int getNumSections();
        
        FileTagList getFiles();
        int getNumFiles();
        FileTagList getFilesInSection(int sectionId);
        //FileTagList getFilesInNoSection();
        FileTagList getSectionlessFiles();
        
        MaybeSectionTag getSection(int id);
        MaybeFileTag getFile(int id);
        
        MaybeBytes getFileContent(int id);
        bool writeFileToDisk(int id, const QString& filename);
        MD5Sums calcChecksumsForFile(int id);
        
        QByteArray getBytes(int startPos, int numBytes);
    
    private:
        bool headerFound();
        SectionTagList readSections();
        FileTagList findFiles();
        
        QByteArray makeValidationTag(const QString& md5ToReplace);
        MaybeSectionTag findLastSection();
        MaybeSectionTag findPrevSection(const SectionTag& section);
        MaybeSectionTag parseSection(const QString& line);
        MaybeFileTag parseFile(const QString& file);
        
        bool fileInSection(const FileTag& file, const SectionTag& section);
        
        MaybeBytes getCompressedFile(int id);
        QByteArray decompressBytes(QByteArray& data,quint32 expectedSize);
    
    private:
        FileIterator m_iter;
        SectionTagList m_sections;
        FileTagList m_files;
        ParseMode m_mode;

    private:
        QRegExp m_fileRegex;
        QRegExp m_sectionRegex;
};


} // namespace

#endif // VHISTPARSER_INCLUDED