EnchantingTableInventoryWindow.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\block\inventory\window;
 
use pocketmine\event\player\PlayerEnchantingOptionsRequestEvent;
use pocketmine\inventory\CallbackInventoryListener;
use pocketmine\inventory\Inventory;
use pocketmine\inventory\InventoryListener;
use pocketmine\inventory\SimpleInventory;
use pocketmine\item\enchantment\EnchantingHelper as Helper;
use pocketmine\item\enchantment\EnchantingOption;
use pocketmine\item\Item;
use pocketmine\player\Player;
use pocketmine\world\Position;
use function array_values;
use function count;
 
final class EnchantingTableInventoryWindow extends BlockInventoryWindow{
    public const SLOT_INPUT = 0;
    public const SLOT_LAPIS = 1;
 
    private array $options = [];
 
    private InventoryListener $listener;
 
    public function __construct(
        Player $viewer,
        Position $holder
    ){
        parent::__construct($viewer, new SimpleInventory(2), $holder);
 
        $weakThis = \WeakReference::create($this);
        $this->listener = new CallbackInventoryListener(
            onSlotChange: static function(Inventory $_, int $slot) use ($weakThis) : void{ //remaining params unneeded
                if($slot === self::SLOT_INPUT && ($strongThis = $weakThis->get()) !== null){
                    $strongThis->regenerateOptions();
                }
            },
            onContentChange: static function() use ($weakThis) : void{
                if(($strongThis = $weakThis->get()) !== null){
                    $strongThis->regenerateOptions();
                }
            }
        );
        $this->inventory->getListeners()->add($this->listener);
    }
 
    public function __destruct(){
        $this->inventory->getListeners()->remove($this->listener);
    }
 
    private function regenerateOptions() : void{
        $this->options = [];
        $item = $this->getInput();
        $options = Helper::generateOptions($this->holder, $item, $this->viewer->getEnchantmentSeed());
 
        $event = new PlayerEnchantingOptionsRequestEvent($this->viewer, $this, $options);
        $event->call();
        if(!$event->isCancelled() && count($event->getOptions()) > 0){
            $this->options = array_values($event->getOptions());
            $this->viewer->getNetworkSession()->getInvManager()?->syncEnchantingTableOptions($this->options);
        }
    }
 
    public function getInput() : Item{
        return $this->inventory->getItem(self::SLOT_INPUT);
    }
 
    public function getLapis() : Item{
        return $this->inventory->getItem(self::SLOT_LAPIS);
    }
 
    public function getOutput(int $optionId) : ?Item{
        $option = $this->getOption($optionId);
        return $option === null ? null : Helper::enchantItem($this->getInput(), $option->getEnchantments());
    }
 
    public function getOption(int $optionId) : ?EnchantingOption{
        return $this->options[$optionId] ?? null;
    }
}