/*
 * This file is a part of CMSLU -- Content Management System like Unix
 * and is not publicly distributed
 * 
 * Copyright (c) 2008, Tomasz Sowa
 * All rights reserved.
 * 
 */
 
#ifndef headerfilecoredb
#define headerfilecoredb


#include <string>
#include <vector>
#include <map>
#include <sstream>
#include <libpq-fe.h>
#include <cstdio>


#include "log.h"
#include "item.h"
#include "misc.h"
#include "error.h"
#include "dircontainer.h"
#include "user.h"
#include "group.h"
#include "ugcontainer.h"


class Db
{
public:

	Db();
	~Db();
	
	void Init(const std::string & database, const std::string & user, const std::string & pass);
	bool CheckUser(std::string & login, std::string & password, long & user_id);
	Error AddItem(Item & item);
	Error EditItemById(Item & item, bool with_subject = true);
	Error EditItemByUrl(Item & item, bool with_subject = true);
	void CheckAllUrlSubject();
	void GetItems(std::vector<Item> & item_table, Item & item_ref);
	void GetItem(std::vector<Item> & item_table, long id);
	bool GetPriv(Item & item, long id);
	bool DelItem(const Item & item);
	void GetDirs(DirContainer & dir_table);
	void GetUsers(UGContainer<User> & user_table);
	void GetGroups(UGContainer<Group> & group_table);



protected:

	PGconn * pg_conn;
	std::string db_database, db_user, db_pass;
	
	void Connect();
	void Close();
	void AssertConnection();
	std::string Escape(const std::string & s);
	std::string Escape(const char * s);
	PGresult * AssertQuery(const std::string & q);
	void AssertResultStatus(PGresult * r, ExecStatusType t);
	static int AssertColumn(PGresult * r, const char * column_name);
	static const char * AssertValue(PGresult * r, int row, int col);
	void ClearResult(PGresult * r);
	long AssertCurrval(const char * table);
	bool AddItemCreateUrlSubject(Item & item);
	
	Error AddItemIntoContent(Item & item);
	Error AddItemIntoItem(Item & item);
	
	Error EditItemInItem(Item & item, bool with_subject);
	Error EditItemInContent(Item & item);
	Error EditItemGetId(Item & item);
	Error EditItemGetContentId(Item & item);
	
	void CheckAllUrlSubjectModifyItem(Item & item);
	
	PGresult * GetItemsQuery(Item & item_ref);
	
	bool  DelItemDelItem(const Item & item);
	void  DelItemDelContent(const Item & item);
	Error DelItemCountContents(const Item & item, long & contents);
	
	
	struct ItemColumns
	{
		int id, user_id, group_id, privileges, url, type, parent_id, content_id, default_item, subject, content, content_type;
	
		void SetColumns(PGresult * r);
		void SetItem(PGresult * r, long row, Item & item);
	};
	

}; // class Db


extern Db db;


#endif