d2tweaks-rnd2k/src/d2tweaks/server/modules/item_move/item_move_server.cpp

#include <d2tweaks/server/modules/item_move/item_move_server.h>

#include <d2tweaks/server/server.h>

#include <diablo2/d2net.h>
#include <diablo2/d2game.h>
#include <diablo2/d2common.h>
#include <diablo2/structures/unit.h>
#include <diablo2/structures/game.h>
#include <diablo2/structures/net_client.h>
#include <diablo2/structures/item_data.h>
#include <diablo2/structures/player_data.h>

#include <spdlog/spdlog.h>

#include <fstream>
#include <iostream>
#include <diablo2/d2client.h>

#include <iomanip> // For std::setw
#include <sstream>
#include <string>
#include <stdexcept> // For std::invalid_argument

#include <windows.h> // Include Windows API header for MessageBox

#include <iomanip> // For std::setw

static uint32_t reverseDWORD(uint32_t dw) {
	return ((dw << 24) & 0xFF000000) | ((dw << 8) & 0x00FF0000) | ((dw >> 8) & 0x0000FF00) | ((dw >> 24) & 0x000000FF);
}

MODULE_INIT(item_move)

void d2_tweaks::server::modules::item_move::init() {
	char acPathToIni[MAX_PATH] = { 0 };
	const char* pcIniFile = "\\d2tweaks.ini";

	GetCurrentDirectory(MAX_PATH, acPathToIni);
	lstrcat(acPathToIni, pcIniFile);

	if (GetPrivateProfileInt("modules", "ItemMover", 1, acPathToIni) != FALSE) {
		singleton<server>::instance().register_packet_handler(common::MESSAGE_TYPE_ITEM_MOVE, this);
	}
}

// handle packet coming from the client
bool d2_tweaks::server::modules::item_move::handle_packet(diablo2::structures::game* game,
	diablo2::structures::unit* player, common::packet_header* packet) {
	static common::item_move_sc resp;
	static auto& instance = singleton<server>::instance();

	const auto itemMove = static_cast<common::item_move_cs*>(packet);
	const auto key = static_cast<common::item_move_cs*>(packet)->item_code;

	// Display key in a message box
	//MessageBox(NULL, key, "Item code", MB_OK | MB_ICONINFORMATION);

	const auto item = instance.get_server_unit(game, itemMove->item_guid, diablo2::structures::unit_type_t::UNIT_TYPE_ITEM); //0x4 = item

	const auto record = diablo2::d2_common::get_item_record(item->data_record_index);

	const char* itemcode = itemMove->item_code;

	// display itemMove->bag_guid in a messagebox
	std::string bag_guid = std::to_string(itemMove->bag_guid);
	//MessageBox(NULL, bag_guid.c_str(), "Bag GUID", MB_OK | MB_ICONINFORMATION);

	const auto bag = instance.get_server_unit(game, itemMove->bag_guid, diablo2::structures::unit_type_t::UNIT_TYPE_ITEM); //0x4 = item

	// display bag guid in a messagebox
	bag_guid = std::to_string(itemMove->bag_guid);
	//MessageBox(NULL, bag_guid.c_str(), "Bag GUID", MB_OK | MB_ICONINFORMATION);

	// display itemMove->iCode in a messagebox
	std::string iCode = std::to_string(itemMove->iCode);
	//MessageBox(NULL, iCode.c_str(), "iCode", MB_OK | MB_ICONINFORMATION);

	if (itemMove->extract == 1) {
		// display bag guid in a messagebox
		std::string bag_guid = std::to_string(itemMove->bag_guid);
		//MessageBox(NULL, bag_guid.c_str(), "Bag GUID", MB_OK | MB_ICONINFORMATION);

		D2PropertyStrc itemProperty = {};
		itemProperty.nProperty = itemMove->prop; // Adjust the property ID
		itemProperty.nLayer = 0;
		itemProperty.nMin = itemMove->val;
		itemProperty.nMax = itemMove->val;

		// Add the gem property to the gem bag
		diablo2::d2_common::add_property(bag, &itemProperty, 0);

		diablo2::d2_game::QUESTS_CreateItem(game, player, reverseDWORD(itemMove->iCode), 1, diablo2::structures::ITEMQUAL_NORMAL, true);
		return true;
	}
	else if (itemMove->tmog == 1) {
		const auto item = instance.get_server_unit(game, itemMove->item_guid, diablo2::structures::unit_type_t::UNIT_TYPE_ITEM); //0x4 = item
		diablo2::d2_game::D2GAME_Transmogrify_6FC4A660(game, player, item);
		diablo2::d2_game::QUESTS_CreateItem(game, player, reverseDWORD('gfv '), 1, diablo2::structures::ITEMQUAL_NORMAL, true);
	}
	else if (itemMove->updateBag == 1) {
		D2PropertyStrc itemProperty = {};
		itemProperty.nProperty = itemMove->prop;
		itemProperty.nLayer = 0;
		itemProperty.nMin = itemMove->val;
		itemProperty.nMax = itemMove->val;
		diablo2::d2_common::add_property(bag, &itemProperty, 1);

		diablo2::d2_common::inv_remove_item(player->inventory, item);

	} 
	else {
		if (item == nullptr)
			return true; //block further packet processing

		const auto inventoryIndex = diablo2::d2_common::get_inventory_index(player, itemMove->target_page, game->item_format == 101);
		uint32_t tx, ty;
		if (!find_free_space(player->inventory, item, inventoryIndex, itemMove->target_page, tx, ty))
			return true; //block further packet processing

		item->item_data->page = itemMove->target_page;
		diablo2::d2_common::inv_add_item(player->inventory, item, tx, ty, inventoryIndex, false, item->item_data->page);
		diablo2::d2_common::inv_update_item(player->inventory, item, false);
		diablo2::d2_game::update_inventory_items(game, player);
		resp.item_guid = itemMove->item_guid;
		resp.target_page = itemMove->target_page;
		resp.tx = tx;
		resp.ty = ty;
		const auto client = player->player_data->net_client;
		diablo2::d2_net::send_to_client(1, client->client_id, &resp, sizeof resp);
		return true;
	}
}

bool d2_tweaks::server::modules::item_move::find_free_space(diablo2::structures::inventory* inv,
	diablo2::structures::unit* item, int32_t inventoryIndex, char page, uint32_t& x, uint32_t& y) {
	char data[0x18];

	diablo2::d2_common::get_inventory_data(inventoryIndex, 0, data);

	const auto mx = static_cast<uint32_t>(data[0]);
	const auto my = static_cast<uint32_t>(data[1]);

	for (x = 0; x < mx; x++) {
		for (y = 0; y < my; y++) {
			diablo2::structures::unit* blockingUnit = nullptr;
			uint32_t blockingUnitIndex = 0;

			if (diablo2::d2_common::can_put_into_slot(inv, item, x, y, inventoryIndex, &blockingUnit, &blockingUnitIndex, page))
				return true;
		}
	}

	return false;
}