Rail.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;
 
use pocketmine\block\utils\RailConnectionInfo;
use pocketmine\block\utils\RailShape;
use pocketmine\data\runtime\RuntimeDataDescriber;
use pocketmine\math\Facing;
 
class Rail extends BaseRail{
 
    private RailShape $railShape = RailShape::FLAT_AXIS_Z;
 
    protected function describeBlockOnlyState(RuntimeDataDescriber $w) : void{
        $w->enum($this->railShape);
    }
 
    protected function setShapeFromConnections(array $connections) : void{
        $railShape = self::searchState($connections, RailConnectionInfo::CONNECTIONS) ?? self::searchState($connections, RailConnectionInfo::CURVE_CONNECTIONS);
        if($railShape === null){
            throw new \InvalidArgumentException("No rail shape matches these connections");
        }
        $this->railShape = RailShape::from($railShape);
    }
 
    protected function getCurrentShapeConnections() : array{
        return RailConnectionInfo::CURVE_CONNECTIONS[$this->railShape->value] ?? RailConnectionInfo::CONNECTIONS[$this->railShape->value];
    }
 
    protected function getPossibleConnectionDirectionsOneConstraint(int $constraint) : array{
        $possible = parent::getPossibleConnectionDirectionsOneConstraint($constraint);
 
        if(($constraint & RailConnectionInfo::FLAG_ASCEND) === 0){
            foreach([
                Facing::NORTH,
                Facing::SOUTH,
                Facing::WEST,
                Facing::EAST
            ] as $d){
                if($constraint !== $d->value){
                    $possible[$d->value] = true;
                }
            }
        }
 
        return $possible;
    }
 
    public function getShape() : RailShape{ return $this->railShape; }
 
    public function setShape(RailShape $shape) : self{
        $this->railShape = $shape;
        return $this;
    }
}