// 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 CL_INTERFACE_EXPR_NODE_H
#define CL_INTERFACE_EXPR_NODE_H

#include "interface_expr.h"

/** Base node of an interface expression parse tree
  * \author Nicolas Vizerie
  * \author Nevrax France
  * \date 2003
  */
class CInterfaceExprNode
{
public:
	virtual ~CInterfaceExprNode() {}
	// eval result of expression, and eventually get the nodes the epression depends on
	virtual void eval(CInterfaceExprValue &result) = 0;
	// The same, but get db nodes the expression depends on (appended to vector)
	virtual void evalWithDepends(CInterfaceExprValue &result, std::vector<ICDBNode *> &nodes) = 0;
	// Get dependencies of the node (appended to vector)
	virtual void getDepends(std::vector<ICDBNode *> &nodes) = 0;
};


// *******************************************************************************************************
/** A constant value already parsed by interface (in a interface expr parse tree)
  */
class CInterfaceExprNodeValue : public CInterfaceExprNode
{
public:
	CInterfaceExprValue Value;
public:
	virtual void eval(CInterfaceExprValue &result);
	virtual void evalWithDepends(CInterfaceExprValue &result, std::vector<ICDBNode *> &nodes);
	virtual void getDepends(std::vector<ICDBNode *> &nodes);
};

// *******************************************************************************************************
/** A fct call (in a interface expr parse tree)
  */
class CInterfaceExprNodeValueFnCall : public CInterfaceExprNode
{
public:
	CInterfaceExpr::TUserFct Func;
	// list of parameters
	std::vector<CInterfaceExprNode *> Params;
public:
	virtual void eval(CInterfaceExprValue &result);
	virtual void evalWithDepends(CInterfaceExprValue &result, std::vector<ICDBNode *> &nodes);
	virtual void getDepends(std::vector<ICDBNode *> &nodes);
	virtual ~CInterfaceExprNodeValueFnCall();
};

// *******************************************************************************************************
/** A db leaf read (in a interface expr parse tree)
  */
class CInterfaceExprNodeDBLeaf : public CInterfaceExprNode
{
public:
	class CCDBNodeLeaf *Leaf;
public:
	virtual void eval(CInterfaceExprValue &result);
	virtual void evalWithDepends(CInterfaceExprValue &result, std::vector<ICDBNode *> &nodes);
	virtual void getDepends(std::vector<ICDBNode *> &nodes);
};

// *******************************************************************************************************
/** A db branch read (in a interface expr parse tree)
  */
class CInterfaceExprNodeDBBranch : public CInterfaceExprNode
{
public:
	class CCDBNodeBranch *Branch;
public:
	virtual void eval(CInterfaceExprValue &result);
	virtual void evalWithDepends(CInterfaceExprValue &result, std::vector<ICDBNode *> &nodes);
	virtual void getDepends(std::vector<ICDBNode *> &nodes);
};

// *******************************************************************************************************
/** A dependant db read (in a interface expr parse tree)
  * This is rarely used so no real optim there..
  */
class CInterfaceExprNodeDependantDBRead : public CInterfaceExprNode
{
public:
	std::string Expr;
public:
	virtual void eval(CInterfaceExprValue &result);
	virtual void evalWithDepends(CInterfaceExprValue &result, std::vector<ICDBNode *> &nodes);
	virtual void getDepends(std::vector<ICDBNode *> &nodes);
};













#endif