EnumTrait.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\utils;
 
trait EnumTrait{
    use RegistryTrait;
    use NotCloneable;
    use NotSerializable;
 
    protected static function register(self $member) : void{
        self::_registryRegister($member->name(), $member);
    }
 
    protected static function registerAll(self ...$members) : void{
        foreach($members as $member){
            self::register($member);
        }
    }
 
    public static function getAll() : array{
        //phpstan doesn't support generic traits yet :(
        $result = self::_registryGetAll();
        return $result;
    }
 
    private static $nextId = null;
 
    private $enumName;
    private $runtimeId;
 
    private function __construct(string $enumName){
        self::verifyName($enumName);
        $this->enumName = $enumName;
        if(self::$nextId === null){
            self::$nextId = Process::pid(); //this provides enough base entropy to prevent hardcoding
        }
        $this->runtimeId = self::$nextId++;
    }
 
    public function name() : string{
        return $this->enumName;
    }
 
    public function id() : int{
        return $this->runtimeId;
    }
 
    public function equals(self $other) : bool{
        return $this->enumName === $other->enumName;
    }
}