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/** \file DebugEngine.h
\brief Define the class for the debug
\author alpha_one_x86
\version 0.3
\date 2010
\note This class don't need be thread safe because ultracopier is done with one thread, but I have implement some basic thread protection
\licence GPL3, see the file COPYING */

#ifndef DEBUG_ENGINE_H
#define DEBUG_ENGINE_H

#include <QObject>
#include <QString>
#include <QFile>
#include <QMutex>
#include <QTime>
#include <QList>
#include <QCoreApplication>

#include "Variable.h"
#include "PlatformMacro.h"
#include "StructEnumDefinition.h"
#include "StructEnumDefinition_UltracopierSpecific.h"
#include "Singleton.h"

#ifdef ULTRACOPIER_DEBUG

/** \brief Define the class for the debug

This class provide all needed for the debug mode of ultracopier */
class DebugEngine : public QObject, public Singleton<DebugEngine>
{
	Q_OBJECT
	friend class Singleton<DebugEngine>;
	public:
		/** \brief Get the html text info for re-show it
		\note This function is thread safe */
		QString getTheDebugHtml();
		/// \brief Enumeration of backend
		enum Backend
		{
			Memory,		//Do intensive usage of memory, used only if the file backend is not available
			File		//Store all directly into file, at crash the backtrace is into the file
		};
		/// \brief return the current backend
		Backend getCurrentBackend();
		/// \brief Get the html end
		QString getTheDebugEnd();
		/** \brief For add message info, this function
		\note This function is reentrant */
		static void addDebugInformationStatic(const DebugLevel &level,const QString& function,const QString& text,const QString& file="",const int& ligne=-1,const QString& location="Core");
		static void addDebugNote(const QString& text);
		/** \brief structure for one debug item */
		struct ItemOfDebug
		{
			DebugLevel_custom level;
			QString time;
			QString file;
			QString function;
			QString location;
			QString text;
		};
		QList<ItemOfDebug> listItemOfDebug;
		QList<ItemOfDebug> getItemList();
	public slots:
		/** \brief ask to the user where save the bug report
		\warning This function can be only call by the graphical thread */
		void saveBugReport();
		/// \todo Put into DebugEngine the dialog to send by the net
		void addDebugInformation(const DebugLevel_custom &level,const QString& fonction,const QString& text,QString file="",const int& ligne=-1,const QString& location="Core");
	private:
		/// \brief Initiate the ultracopier event dispatcher and check if no other session is running
		DebugEngine();
		/** \brief Destroy the ultracopier event dispatcher
		\note This function is thread safe */
		~DebugEngine();
		/// \brief Path for log file
		QFile logFile;
		/// \brief Path for lock file
		QFile lockFile;
		/// \brief Internal function to remove the lock file
		bool removeTheLockFile();
		/** \brief Do thread safe part for the addDebugInformation()
		\see addDebugInformation() */
		QMutex mutex;
		QMutex mutexList;
		/// \brief For record the start time
		QTime startTime;
		/// \brief String for the end of log file
		QString endOfLogFile;
		/// \brief Drop the html entities
		QString htmlEntities(QString text);
		/// \brief To store the debug informations
		QString debugHtmlContent;
		/// \brief The current backend
		Backend currentBackend;
		/// try connect to send to the current running instance the arguements
		bool tryConnect();
		//temp variable
		/* can't because multiple thread can access at this variable
		QString addDebugInformation_lignestring;
		QString addDebugInformation_fileString;
		QString addDebugInformation_time;
		QString addDebugInformation_htmlFormat;
		QString addDebugInformation_textFormat;*/
		quint32 addDebugInformationCallNumber;
	signals:
		/// \brief Send that's when new debug info is added
		void newDebugInformation();
};

#endif // ULTRACOPIER_DEBUG

#endif // DEBUG_ENGINE_H