/*
 * This file is a part of Winix
 * and is not publicly distributed
 * 
 * Copyright (c) 2010, Tomasz Sowa
 * All rights reserved.
 * 
 */
 
#ifndef headerfile_winix_plugins_thread_tdb
#define headerfile_winix_plugins_thread_tdb


#include <vector>
#include "thread.h"
#include "db/dbbase.h"
#include "core/error.h"



namespace Thread
{


class TDb : public DbBase
{
public:

	/*
		high level interface
	*/

	Error AddThread(const Thread & thread);
	Error GetThread(long file_id, Thread & thread);
	Error GetThreads(const std::vector<long> & file_id_tab, std::vector<Thread> & thread_tab);
	Error RemoveThread(long file_id);

	Error AddAnswer(long file_id, long answer_id);
	Error GetAnswers(long file_id, std::vector<long> & answer_id_tab);
	Error RemoveAnswer(long answer_id);


	/*
		low level interface
	*/

	// looking for the last answer in a thread (in 'thread_files' table)
	// this is not the value from 'thread' table
	long FindLastAnswer(long file_id);

	// returning all threads id (file_id) (from 'thread' table)
	void GetAllThreadsId(std::vector<long> & file_id);

	// removing only the answer in 'thread_files' table without updating 'thread' table
	Error RemoveAnswerOnly(long answer_id);

	// returning how many answers there are
	// calculating from 'thread_files' table
	// this is not the value from 'thread' table
	long CalcAnswers(long file_id);

	// recalculating last_item, replies in 'thread' table on a given thread
	Error RecalcThread(long file_id);


private:

	DbTextStream query;
	std::wstring list_id;
	int cfile_id, creplies, cclosed, clast_item, cdate_modification, cuser_id, cguest;
	Thread thread_temp;
	std::vector<long> file_id_tab;

	void  SetThreadColumns(PGresult * r);
	void  SetThread(PGresult * r, int col, Thread & thread);
	Error RemoveAnswerRecalcLast(long file_id);
	Error RemoveAnswerRecalcLast(const std::vector<long> & file_id_tab);

};


} // namespace


#endif