src/crafting/ShapedRecipe.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\item\Item;
use pocketmine\utils\Utils;
use function array_values;
use function count;
use function implode;
use function str_contains;
use function strlen;
 
class ShapedRecipe implements CraftingRecipe{
    private array $shape = [];
    private array $ingredientList = [];
    private array $results = [];
 
    private int $height;
    private int $width;
 
    public function __construct(array $shape, array $ingredients, array $results){
        $this->height = count($shape);
        if($this->height > 3 || $this->height <= 0){
            throw new \InvalidArgumentException("Shaped recipes may only have 1, 2 or 3 rows, not $this->height");
        }
 
        $shape = array_values($shape);
 
        $this->width = strlen($shape[0]);
        if($this->width > 3 || $this->width <= 0){
            throw new \InvalidArgumentException("Shaped recipes may only have 1, 2 or 3 columns, not $this->width");
        }
 
        foreach($shape as $y => $row){
            if(strlen($row) !== $this->width){
                throw new \InvalidArgumentException("Shaped recipe rows must all have the same length (expected $this->width, got " . strlen($row) . ")");
            }
 
            for($x = 0; $x < $this->width; ++$x){
                if($row[$x] !== ' ' && !isset($ingredients[$row[$x]])){
                    throw new \InvalidArgumentException("No item specified for symbol '" . $row[$x] . "'");
                }
            }
        }
 
        $this->shape = $shape;
 
        foreach(Utils::stringifyKeys($ingredients) as $char => $i){
            if(!str_contains(implode($this->shape), $char)){
                throw new \InvalidArgumentException("Symbol '$char' does not appear in the recipe shape");
            }
 
            $this->ingredientList[$char] = clone $i;
        }
 
        $this->results = Utils::cloneObjectArray($results);
    }
 
    public function getWidth() : int{
        return $this->width;
    }
 
    public function getHeight() : int{
        return $this->height;
    }
 
    public function getResults() : array{
        return Utils::cloneObjectArray($this->results);
    }
 
    public function getResultsFor(CraftingGrid $grid) : array{
        return $this->getResults();
    }
 
    public function getIngredientMap() : array{
        $ingredients = [];
 
        for($y = 0; $y < $this->height; ++$y){
            for($x = 0; $x < $this->width; ++$x){
                $ingredients[$y][$x] = $this->getIngredient($x, $y);
            }
        }
 
        return $ingredients;
    }
 
    public function getIngredientList() : array{
        $ingredients = [];
 
        for($y = 0; $y < $this->height; ++$y){
            for($x = 0; $x < $this->width; ++$x){
                $ingredient = $this->getIngredient($x, $y);
                if($ingredient !== null){
                    $ingredients[] = $ingredient;
                }
            }
        }
 
        return $ingredients;
    }
 
    public function getIngredient(int $x, int $y) : ?RecipeIngredient{
        return $this->ingredientList[$this->shape[$y][$x]] ?? null;
    }
 
    public function getShape() : array{
        return $this->shape;
    }
 
    private function matchInputMap(CraftingGrid $grid, bool $reverse) : bool{
        for($y = 0; $y < $this->height; ++$y){
            for($x = 0; $x < $this->width; ++$x){
 
                $given = $grid->getIngredient($reverse ? $this->width - $x - 1 : $x, $y);
                $required = $this->getIngredient($x, $y);
 
                if($required === null){
                    if(!$given->isNull()){
                        return false; //hole, such as that in the center of a chest recipe, should not be filled
                    }
                }elseif(!$required->accepts($given)){
                    return false;
                }
            }
        }
 
        return true;
    }
 
    public function matchesCraftingGrid(CraftingGrid $grid) : bool{
        if($this->width !== $grid->getRecipeWidth() || $this->height !== $grid->getRecipeHeight()){
            return false;
        }
 
        return $this->matchInputMap($grid, false) || $this->matchInputMap($grid, true);
    }
}