CraftingGrid.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\crafting;
 
use pocketmine\inventory\SimpleInventory;
use pocketmine\item\Item;
use function max;
use function min;
use const PHP_INT_MAX;
 
abstract class CraftingGrid extends SimpleInventory{
    public const SIZE_SMALL = 2;
    public const SIZE_BIG = 3;
 
    private ?int $startX = null;
    private ?int $xLen = null;
    private ?int $startY = null;
    private ?int $yLen = null;
 
    public function __construct(
        private int $gridWidth
    ){
        parent::__construct($this->getGridWidth() ** 2);
    }
 
    public function getGridWidth() : int{
        return $this->gridWidth;
    }
 
    public function setItem(int $index, Item $item) : void{
        parent::setItem($index, $item);
        $this->seekRecipeBounds();
    }
 
    private function seekRecipeBounds() : void{
        $minX = PHP_INT_MAX;
        $maxX = 0;
 
        $minY = PHP_INT_MAX;
        $maxY = 0;
 
        $empty = true;
 
        for($y = 0; $y < $this->gridWidth; ++$y){
            for($x = 0; $x < $this->gridWidth; ++$x){
                if(!$this->isSlotEmpty($y * $this->gridWidth + $x)){
                    $minX = min($minX, $x);
                    $maxX = max($maxX, $x);
 
                    $minY = min($minY, $y);
                    $maxY = max($maxY, $y);
 
                    $empty = false;
                }
            }
        }
 
        if(!$empty){
            $this->startX = $minX;
            $this->xLen = $maxX - $minX + 1;
            $this->startY = $minY;
            $this->yLen = $maxY - $minY + 1;
        }else{
            $this->startX = $this->xLen = $this->startY = $this->yLen = null;
        }
    }
 
    public function getIngredient(int $x, int $y) : Item{
        if($this->startX !== null && $this->startY !== null){
            return $this->getItem(($y + $this->startY) * $this->gridWidth + ($x + $this->startX));
        }
 
        throw new \LogicException("No ingredients found in grid");
    }
 
    public function getRecipeWidth() : int{
        return $this->xLen ?? 0;
    }
 
    public function getRecipeHeight() : int{
        return $this->yLen ?? 0;
    }
}