// Ryzom - MMORPG Framework <http://dev.ryzom.com/projects/ryzom/>
// Copyright (C) 2010  Winch Gate Property Limited
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <http://www.gnu.org/licenses/>.

#ifndef MOVE_CHECKER_H
#define MOVE_CHECKER_H

#include "nel/misc/types_nl.h"
#include "nel/misc/smart_ptr.h"

#include "game_share/base_types.h"


class CMoveChecker: public NLMISC::CRefCount
{
public:
	// inform the move checker that a player is being teleported - the move checker performs no test but
	// updates internal info on player position
	void teleport(TDataSetRow entityIndex, sint32 x, sint32 y, uint32 tick);

	// ensure that the move attempted by a player is legal
	// if the move is not valid then x, y and z are changed to make the move valid
	// return true if move is valid otherwise false
	bool checkMove(TDataSetRow entityIndex, sint32& x, sint32& y, uint32 tick);

	// remove a player from the checker (when they have deconnect)
	void remove(TDataSetRow entityIndex);

private:
	// private data

	struct SPosition
	{
		sint32 X, Y;
		uint32 Tick;

		SPosition(): X(0), Y(0), Tick(0)	{}
	};
	typedef std::map<TDataSetRow,SPosition> TPositions;
	TPositions _Positions;
};

#endif