SlotChangeAction.php

<?php
 
/*
 *
 *  ____            _        _   __  __ _                  __  __ ____
 * |  _ \ ___   ___| | _____| |_|  \/  (_)_ __   ___      |  \/  |  _ \
 * | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
 * |  __/ (_) | (__|   <  __/ |_| |  | | | | | |  __/_____| |  | |  __/
 * |_|   \___/ \___|_|\_\___|\__|_|  |_|_|_| |_|\___|     |_|  |_|_|
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * @author PocketMine Team
 * @link http://www.pocketmine.net/
 *
 *
 */
 
declare(strict_types=1);
 
namespace pocketmine\inventory\transaction\action;
 
use pocketmine\inventory\Inventory;
use pocketmine\inventory\SlotValidatedInventory;
use pocketmine\inventory\transaction\TransactionValidationException;
use pocketmine\item\Item;
use pocketmine\player\InventoryWindow;
use pocketmine\player\Player;
 
class SlotChangeAction extends InventoryAction{
    public function __construct(
        protected InventoryWindow $inventoryWindow,
        private int $inventorySlot,
        Item $sourceItem,
        Item $targetItem
    ){
        parent::__construct($sourceItem, $targetItem);
    }
 
    public function getInventoryWindow() : InventoryWindow{
        return $this->inventoryWindow;
    }
 
    public function getSlot() : int{
        return $this->inventorySlot;
    }
 
    public function validate(Player $source) : void{
        $inventory = $this->inventoryWindow->getInventory();
        if(!$inventory->slotExists($this->inventorySlot)){
            throw new TransactionValidationException("Slot does not exist");
        }
        if(!$inventory->getItem($this->inventorySlot)->equalsExact($this->sourceItem)){
            throw new TransactionValidationException("Slot does not contain expected original item");
        }
        if($this->targetItem->getCount() > $this->targetItem->getMaxStackSize()){
            throw new TransactionValidationException("Target item exceeds item type max stack size");
        }
        if($this->targetItem->getCount() > $inventory->getMaxStackSize()){
            throw new TransactionValidationException("Target item exceeds inventory max stack size");
        }
        if($inventory instanceof SlotValidatedInventory && !$this->targetItem->isNull()){
            foreach($inventory->getSlotValidators() as $validator){
                $ret = $validator->validate($inventory, $this->targetItem, $this->inventorySlot);
                if($ret !== null){
                    throw new TransactionValidationException("Target item is not accepted by the inventory at slot #" . $this->inventorySlot . ": " . $ret->getMessage(), 0, $ret);
                }
            }
        }
    }
 
    public function execute(Player $source) : void{
        $this->inventoryWindow->getInventory()->setItem($this->inventorySlot, $this->targetItem);
    }
}