ProtectionEnchantment.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\item\enchantment;
 
use pocketmine\event\entity\EntityDamageEvent;
use pocketmine\lang\Translatable;
use function array_fill_keys;
use function floor;
 
class ProtectionEnchantment extends Enchantment{
    protected float $typeModifier;
    protected ?array $applicableDamageTypes = null;
 
    public function __construct(Translatable|string $name, int $rarity, int $primaryItemFlags, int $secondaryItemFlags, int $maxLevel, float $typeModifier, ?array $applicableDamageTypes, ?\Closure $minEnchantingPower = null, int $enchantingPowerRange = 50){
        parent::__construct($name, $rarity, $primaryItemFlags, $secondaryItemFlags, $maxLevel, $minEnchantingPower, $enchantingPowerRange);
 
        $this->typeModifier = $typeModifier;
        if($applicableDamageTypes !== null){
            $this->applicableDamageTypes = array_fill_keys($applicableDamageTypes, true);
        }
    }
 
    public function getTypeModifier() : float{
        return $this->typeModifier;
    }
 
    public function getProtectionFactor(int $level) : int{
        return (int) floor((6 + $level ** 2) * $this->typeModifier / 3);
    }
 
    public function isApplicable(EntityDamageEvent $event) : bool{
        return $this->applicableDamageTypes === null || isset($this->applicableDamageTypes[$event->getCause()]);
    }
}