#ifndef _TABLE_TO_JSON_HPP_
#define _TABLE_TO_JSON_HPP_
 
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <iDA/iDA.h>

#define NORECORD  100

using namespace std;
using namespace iPlature;
using namespace iDA;
using namespace log4cplus;

extern iDA::Connection cn;

//template <class T> class TabToJson
class TabToJson
{
	private:
		iDA::Command cmd;
		char jsonBuffer[20000];
		string tmp;
		int index;
	public:
		TabToJson()
		{
			tmp="";
			index=0;
			memset(jsonBuffer,0x00,sizeof(jsonBuffer));
		}
		~TabToJson()
		{
			return;
		}
		
	public:
		/* Read DB Table Data to json */
		/*
		{
			"columns":["c1","c2","c3"],
			"values":[["v11","v12","v13"],["v21","v22","v23"]]
		}
		*/
		string ToJson(char* dbwhere = NULL)
		{
			LOG log("TabToJson::ToJson");
			try
			{
				cmd.SetConnection(&cn);
				cmd.SetCommandText(dbwhere);
				cmd.Execute();
				int icolCount=cmd.FieldCount();
				tmp="{\"columns\":[";
				sprintf(&jsonBuffer[index],"%s",tmp.c_str());
				index+=tmp.size();					
				for(int i=1;i<=icolCount;i++)
				{
					tmp="\""+cmd.Field(i).Name()+"\",";
					sprintf(&jsonBuffer[index],"%s",tmp.c_str());
					index+=tmp.size();
					//log.Debug()<<"icols:"<<icols<<endl;
				}			
				tmp="],";
				sprintf(&jsonBuffer[index-1],"%s",tmp.c_str());
				index+=tmp.size();
				//
				index-=1;				
				tmp="\"values\":[";
				sprintf(&jsonBuffer[index],"%s",tmp.c_str());
				index+=tmp.size();
				
				string idata="";
				while(cmd.FetchNext())
				{					
					for(int i=1;i<=icolCount;i++)
					{
						idata+="\""+cmd.Field(i).AsString()+"\",";
					}					
					tmp="["+idata.substr(0,idata.size()-1)+"],";
					sprintf(&jsonBuffer[index],"%s",tmp.c_str());
					index+=tmp.size();
					idata="";
				}				
				tmp="]}";
				sprintf(&jsonBuffer[index-1],"%s",tmp.c_str());
				index+=tmp.size();				
				return  jsonBuffer;
			}
			catch(iDA::Exception &x)
			{
				log.Debug()<<"Exception:"<<x.ErrMsg()<<endl;
				try
				{
					 cn.Rollback();
				}
				catch(iDA::Exception &)
				{
				}
			}
			return  NULL;
		}
};
 
#endif