cuberite-2a/src/Item.h

// Item.h

// Declares the cItem class representing an item (in the inventory sense)





#pragma once

#include "Defines.h"
#include "Enchantments.h"





// fwd:
class cItemHandler;

namespace Json
{
	class Value;
}





// tolua_begin
class cItem
{
public:
	/// Creates an empty item
	cItem(void) :
		m_ItemType(E_ITEM_EMPTY),
		m_ItemCount(0),
		m_ItemDamage(0)
	{
	}
	
	
	/// Creates an item of the specified type, by default 1 piece with no damage and no enchantments
	cItem(
		short a_ItemType,
		char a_ItemCount = 1,
		short a_ItemDamage = 0,
		const AString & a_Enchantments = ""
	) :
		m_ItemType    (a_ItemType),
		m_ItemCount   (a_ItemCount),
		m_ItemDamage  (a_ItemDamage),
		m_Enchantments(a_Enchantments)
	{
		if (!IsValidItem(m_ItemType))
		{
			if (m_ItemType != E_BLOCK_AIR)
			{
				LOGWARNING("%s: creating an invalid item type (%d), resetting to empty.", __FUNCTION__, a_ItemType);
			}
			Empty();
		}
	}
	
	
	/// Creates an exact copy of the item
	cItem(const cItem & a_CopyFrom) :
		m_ItemType    (a_CopyFrom.m_ItemType),
		m_ItemCount   (a_CopyFrom.m_ItemCount),
		m_ItemDamage  (a_CopyFrom.m_ItemDamage),
		m_Enchantments(a_CopyFrom.m_Enchantments)
	{
	}
	
	
	void Empty(void)
	{
		m_ItemType = E_ITEM_EMPTY;
		m_ItemCount = 0;
		m_ItemDamage = 0;
		m_Enchantments.Clear();
	}
	
	
	void Clear(void)
	{
		m_ItemType = E_ITEM_EMPTY;
		m_ItemCount = 0;
		m_ItemDamage = 0;
	}
	
	
	bool IsEmpty(void) const
	{
		return ((m_ItemType <= 0) || (m_ItemCount <= 0));
	}
	
	
	bool IsEqual(const cItem & a_Item) const
	{
		return (
			IsSameType(a_Item) &&
			(m_ItemDamage == a_Item.m_ItemDamage) &&
			(m_Enchantments == a_Item.m_Enchantments)
		);
	}
	
	
	bool IsSameType(const cItem & a_Item) const
	{
		return (m_ItemType == a_Item.m_ItemType) || (IsEmpty() && a_Item.IsEmpty());
	}
	

	/// Returns a copy of this item with m_ItemCount set to 1. Useful to preserve enchantments etc. on stacked items
	cItem CopyOne(void) const;
	
	/// Adds the specified count to this object and returns the reference to self (useful for chaining)
	cItem & AddCount(char a_AmountToAdd);
	
	/// Returns the maximum damage value that this item can have; zero if damage is not applied
	short GetMaxDamage(void) const;
	
	/// Damages a weapon / tool. Returns true when damage reaches max value and the item should be destroyed
	bool DamageItem(short a_Amount = 1);

	inline bool IsDamageable(void) const { return (GetMaxDamage() > 0); }
	
	/// Returns true if this itemstack can stack with the specified stack (types match, enchantments etc.) ItemCounts are ignored!
	bool IsStackableWith(const cItem & a_OtherStack) const;
	
	/// Returns true if the item is stacked up to its maximum stacking.
	bool IsFullStack(void) const;
	
	/// Returns the maximum amount of stacked items of this type.
	char GetMaxStackSize(void) const;

	// tolua_end
	
	/// Returns the cItemHandler responsible for this item type
	cItemHandler * GetHandler(void) const;
	
	/// Saves the item data into JSON representation
	void GetJson(Json::Value & a_OutValue) const;
	
	/// Loads the item data from JSON representation
	void FromJson(const Json::Value & a_Value);
	
	/// Returns true if the specified item type is enchantable (as per 1.2.5 protocol requirements)
	static bool IsEnchantable(short a_ItemType);

	// tolua_begin
	
	short         m_ItemType;
	char          m_ItemCount;
	short         m_ItemDamage;
	cEnchantments m_Enchantments;
};
// tolua_end





/** This class bridges a vector of cItem for safe access via Lua. It checks boundaries for all accesses
Note that this class is zero-indexed!
*/
class cItems  // tolua_export
	: public std::vector<cItem>
{  // tolua_export
public:
	// tolua_begin
	
	/// Need a Lua-accessible constructor
	cItems(void) {}
	
	cItem * Get   (int a_Idx);
	void    Set   (int a_Idx, const cItem & a_Item);
	void    Add   (const cItem & a_Item) {push_back(a_Item); }
	void    Delete(int a_Idx);
	void    Clear (void) {clear(); }
	int     Size  (void) {return size(); }
	void    Set   (int a_Idx, ENUM_ITEM_ID a_ItemType, char a_ItemCount, short a_ItemDamage);

	void    Add   (ENUM_ITEM_ID a_ItemType, char a_ItemCount, short a_ItemDamage)
	{
		push_back(cItem(a_ItemType, a_ItemCount, a_ItemDamage));
	}
	
	// tolua_end
} ;  // tolua_export





/// Used to store loot probability tables
class cLootProbab
{
public:
	cItem m_Item;
	int   m_MinAmount;
	int   m_MaxAmount;
	int   m_Weight;
} ;