EffectManager.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\entity\effect;
 
use pocketmine\entity\Living;
use pocketmine\event\entity\EntityEffectAddEvent;
use pocketmine\event\entity\EntityEffectRemoveEvent;
use function count;
use function spl_object_id;
 
class EffectManager extends EffectCollection{
 
    public function __construct(
        private Living $entity
    ){
        parent::__construct();
    }
 
    public function remove(Effect $effectType) : void{
        $index = spl_object_id($effectType);
        if(isset($this->effects[$index])){
            $effect = $this->effects[$index];
            $ev = new EntityEffectRemoveEvent($this->entity, $effect);
            $ev->call();
            if($ev->isCancelled()){
                foreach($this->effectAddHooks as $hook){
                    $hook($ev->getEffect(), true);
                }
                return;
            }
 
            $effect->getType()->remove($this->entity, $effect);
            parent::remove($effectType);
        }
    }
 
    public function add(EffectInstance $effect) : bool{
        $index = spl_object_id($effect->getType());
        $oldEffect = $this->effects[$index] ?? null;
 
        $ev = new EntityEffectAddEvent($this->entity, $effect, $oldEffect);
        if(!$this->canAdd($effect)){
            $ev->cancel();
        }
 
        $ev->call();
        if($ev->isCancelled()){
            return false;
        }
 
        if($oldEffect !== null){
            $oldEffect->getType()->remove($this->entity, $oldEffect);
        }
 
        $effect->getType()->add($this->entity, $effect);
 
        return parent::add($effect);
    }
 
    public function tick(int $tickDiff = 1) : bool{
        foreach($this->effects as $instance){
            $type = $instance->getType();
            if($type->canTick($instance)){
                $type->applyEffect($this->entity, $instance);
            }
            $instance->decreaseDuration($tickDiff);
            if($instance->hasExpired()){
                $this->remove($instance->getType());
            }
        }
 
        return count($this->effects) > 0;
    }
}