From b691c43c44ff180d10e7d4a9afc83b98551ff586 Mon Sep 17 00:00:00 2001
From: daoge_cmd <3523206925@qq.com>
Date: Sun, 1 Mar 2026 12:16:08 +0800
Subject: Initial commit

---
 Minecraft.World/MerchantRecipeList.cpp | 195 +++++++++++++++++++++++++++++++++
 1 file changed, 195 insertions(+)
 create mode 100644 Minecraft.World/MerchantRecipeList.cpp

(limited to 'Minecraft.World/MerchantRecipeList.cpp')

diff --git a/Minecraft.World/MerchantRecipeList.cpp b/Minecraft.World/MerchantRecipeList.cpp
new file mode 100644
index 00000000..bd7a126c
--- /dev/null
+++ b/Minecraft.World/MerchantRecipeList.cpp
@@ -0,0 +1,195 @@
+#include "stdafx.h"
+#include "net.minecraft.world.item.trading.h"
+#include "MerchantRecipeList.h"
+
+MerchantRecipeList::MerchantRecipeList()
+{
+}
+
+MerchantRecipeList::MerchantRecipeList(CompoundTag *tag)
+{
+	load(tag);
+}
+
+MerchantRecipeList::~MerchantRecipeList()
+{
+	for(AUTO_VAR(it, m_recipes.begin()); it != m_recipes.end(); ++it)
+	{
+		delete (*it);
+	}
+}
+
+MerchantRecipe *MerchantRecipeList::getRecipeFor(shared_ptr<ItemInstance> buyA, shared_ptr<ItemInstance> buyB, int selectionHint)
+{
+	if (selectionHint > 0 && selectionHint < m_recipes.size())
+	{
+		// attempt to match vs the hint
+		MerchantRecipe *r = m_recipes.at(selectionHint);
+		if (buyA->id == r->getBuyAItem()->id && ((buyB == NULL && !r->hasSecondaryBuyItem()) || (r->hasSecondaryBuyItem() && buyB != NULL && r->getBuyBItem()->id == buyB->id)))
+		{
+			if (buyA->count >= r->getBuyAItem()->count && (!r->hasSecondaryBuyItem() || buyB->count >= r->getBuyBItem()->count))
+			{
+				return r;
+			}
+		}
+		return NULL;
+	}
+	for (int i = 0; i < m_recipes.size(); i++)
+	{
+		MerchantRecipe *r = m_recipes.at(i);
+		if (buyA->id == r->getBuyAItem()->id && buyA->count >= r->getBuyAItem()->count
+			&& ((!r->hasSecondaryBuyItem() && buyB == NULL) || (r->hasSecondaryBuyItem() && buyB != NULL && r->getBuyBItem()->id == buyB->id && buyB->count >= r->getBuyBItem()->count)))
+		{
+			return r;
+		}
+	}
+	return NULL;
+}
+
+bool MerchantRecipeList::addIfNewOrBetter(MerchantRecipe *recipe)
+{
+	bool added = false;
+	for (int i = 0; i < m_recipes.size(); i++)
+	{
+		MerchantRecipe *r = m_recipes.at(i);
+		if (recipe->isSame(r))
+		{
+			if (recipe->isSameSameButBetter(r))
+			{
+				delete m_recipes[i];
+				m_recipes[i] = recipe;
+				added = true;
+			}
+			return added;
+		}
+	}
+	m_recipes.push_back(recipe);
+	return true;
+}
+
+MerchantRecipe *MerchantRecipeList::getMatchingRecipeFor(shared_ptr<ItemInstance> buy, shared_ptr<ItemInstance> buyB, shared_ptr<ItemInstance> sell)
+{
+	for (int i = 0; i < m_recipes.size(); i++)
+	{
+		MerchantRecipe *r = m_recipes.at(i);
+		if (buy->id == r->getBuyAItem()->id && buy->count >= r->getBuyAItem()->count && sell->id == r->getSellItem()->id)
+		{
+			if (!r->hasSecondaryBuyItem() || (buyB != NULL && buyB->id == r->getBuyBItem()->id && buyB->count >= r->getBuyBItem()->count))
+			{
+				return r;
+			}
+		}
+	}
+	return NULL;
+}
+
+void MerchantRecipeList::writeToStream(DataOutputStream *stream)
+{
+	stream->writeByte((byte) (m_recipes.size() & 0xff));
+	for (int i = 0; i < m_recipes.size(); i++)
+	{
+		MerchantRecipe *r = m_recipes.at(i);
+		Packet::writeItem(r->getBuyAItem(), stream);
+		Packet::writeItem(r->getSellItem(), stream);
+
+		shared_ptr<ItemInstance> buyBItem = r->getBuyBItem();
+		stream->writeBoolean(buyBItem != NULL);
+		if (buyBItem != NULL)
+		{
+			Packet::writeItem(buyBItem, stream);
+		}
+		stream->writeBoolean(r->isDeprecated());
+		stream->writeInt(r->getUses());
+		stream->writeInt(r->getMaxUses());
+	}
+}
+
+MerchantRecipeList *MerchantRecipeList::createFromStream(DataInputStream *stream)
+{
+	MerchantRecipeList *list = new MerchantRecipeList();
+
+	int count = (int) (stream->readByte() & 0xff);
+	for (int i = 0; i < count; i++)
+	{
+		shared_ptr<ItemInstance> buy = Packet::readItem(stream);
+		shared_ptr<ItemInstance> sell = Packet::readItem(stream);
+
+		shared_ptr<ItemInstance> buyB = nullptr;
+		if (stream->readBoolean())
+		{
+			buyB = Packet::readItem(stream);
+		}
+		bool isDeprecated = stream->readBoolean();
+		int uses = stream->readInt();
+		int maxUses = stream->readInt();
+
+		MerchantRecipe *recipe = new MerchantRecipe(buy, buyB, sell, uses, maxUses);
+		if (isDeprecated)
+		{
+			recipe->enforceDeprecated();
+		}
+		list->push_back(recipe);
+	}
+	return list;
+}
+
+void MerchantRecipeList::load(CompoundTag *tag)
+{
+	ListTag<CompoundTag> *list = (ListTag<CompoundTag> *) tag->getList(L"Recipes");
+
+	for (int i = 0; i < list->size(); i++)
+	{
+		CompoundTag *recipeTag = list->get(i);
+		m_recipes.push_back(new MerchantRecipe(recipeTag));
+	}
+}
+
+CompoundTag *MerchantRecipeList::createTag()
+{
+	CompoundTag *tag = new CompoundTag();
+
+	ListTag<CompoundTag> *list = new ListTag<CompoundTag>(L"Recipes");
+	for (int i = 0; i < m_recipes.size(); i++)
+	{
+		MerchantRecipe *merchantRecipe = m_recipes.at(i);
+		list->add(merchantRecipe->createTag());
+	}
+	tag->put(L"Recipes", list);
+
+	return tag;
+}
+
+void MerchantRecipeList::push_back(MerchantRecipe *recipe)
+{
+	m_recipes.push_back(recipe);
+}
+
+MerchantRecipe *MerchantRecipeList::at(size_t index)
+{
+	return m_recipes.at(index);
+}
+
+std::vector<MerchantRecipe *>::iterator MerchantRecipeList::begin()
+{
+	return m_recipes.begin();
+}
+
+std::vector<MerchantRecipe *>::iterator MerchantRecipeList::end()
+{
+	return m_recipes.end();
+}
+
+std::vector<MerchantRecipe *>::iterator MerchantRecipeList::erase(std::vector<MerchantRecipe *>::iterator it)
+{
+	return m_recipes.erase(it);
+}
+
+size_t MerchantRecipeList::size()
+{
+	return m_recipes.size();
+}
+
+bool MerchantRecipeList::empty()
+{
+	return m_recipes.empty();
+}
\ No newline at end of file
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