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#ifndef _CONTENT_HISTORY_H
#define _CONTENT_HISTORY_H

#include "tcommon.h"
#include "tfilepath.h"
#include <qstring>
#include <qdatetime>
#include <map>
#include <set>

using namespace std;
#undef DVAPI
#undef DVVAR
#ifdef TNZCORE_EXPORTS
#define DVAPI DV_EXPORT_API
#define DVVAR DV_EXPORT_VAR
#else
#define DVAPI DV_IMPORT_API
#define DVVAR DV_IMPORT_VAR
#endif

//!this class keeps tracks of modification times on contents, as well as user and machine info;
//!typically used for levels and scene files (or whatever you like...)
// it is used for visualitation purposed only in the infoview, in example

class DVAPI TContentHistory
{
	bool m_isLevel;
	std::map<TFrameId, QDateTime> m_records;
	QString m_frozenHistory;

	const QString currentToString() const;

public:
	//!set isLevel=true if you want to keep track of single-frames modifications
	TContentHistory(bool isLevel);

	~TContentHistory();

	TContentHistory *clone() const;

	//! history can come only from a deserialization
	//!WARNING! any preexistent history will be erased by calling this method
	void deserialize(const QString &history);

	//!the returned string is only for visualitation and serialization
	const QString serialize() const;

	//!after calling this method, following history info added will not "merge" with the history until now
	void fixCurrentHistory();

	//!do not call this 2 methods if isLevel==false! (assertion fails)
	void frameModifiedNow(const TFrameId &id) { frameRangeModifiedNow(id, id); }
	void frameRangeModifiedNow(const TFrameId &fromId, const TFrameId &toId);

	//!do not call this method if isLevel==true! (assertion fails)
	void modifiedNow();
};

#endif