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/*
   core/item.h
   This file is part of the Osirion project and is distributed under
   the terms of the GNU General Public License version 2
*/

#ifndef __INCLUDED_CORE_ITEM_H__
#define __INCLUDED_CORE_ITEM_H__

#include "core/info.h"

namespace core
{

/**
 * @brief an item in the inventory of an entity
 * The info record represents the type of the item
 */
class Item
{
public:
	enum Flags {Tradeable = 1};
	
	Item(const Info *info);
	
	/// copy constructor
	Item(const Item &other);
	
	~Item();
	
	/* ---- inspectors --------------------------------------------- */
	
	/**
	 * @brief associated amount
	 */
	 inline long amount() const { return item_amount; }

	/**
	 * @brief information card
	 */
	inline const Info *info() const { return item_info; }
	 

	inline const long price() const {
		return item_price;
	}
	
	inline const unsigned long timestamp() const {
		return item_timestamp;
	}
	
	/// item flags
	inline const unsigned int flags() const {
		return item_flags;
	}
	
	/// returns true of a flag is set
	inline const bool has_flag(const Flags flag) const {
		return ((item_flags & (unsigned int) flag) == (unsigned int) flag);
	}
	
	/* ---- mutators ----------------------------------------------- */

	/**
	 * @brief set associated amount
	 */
	void set_amount(const long amount);
	 
	void inc_amount(const long amount);
	 
	void dec_amount(const long amount);
	 
	void set_price(const long price);
	
	/// set flag
	inline void set_flag(Flags flag) {
		item_flags |= flag;
	}

	/// unset flag
	inline void unset_flag(Flags flag) {
		item_flags &= ~flag;
	}
	void set_dirty();
	
	/* ---- serializers -------------------------------------------- */
	 
	void serialize_server_update(std::ostream & os) const;

	void receive_server_update(std::istream &is);
	
private:
	void set_timestamp(const unsigned long timestamp);
	
	const Info		*item_info;
	long			item_price;
	long 			item_amount;
	
	unsigned long		item_timestamp;
	
	unsigned int		item_flags;
};

} // namespace core

#endif // __INCLUDED_CORE_ITEM_H__