EntityDamageEvent.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\event\entity;
 
use pocketmine\entity\Entity;
use pocketmine\event\Cancellable;
use pocketmine\event\CancellableTrait;
use function array_sum;
use function max;
 
class EntityDamageEvent extends EntityEvent implements Cancellable{
    use CancellableTrait;
 
    public const MODIFIER_ARMOR = 1;
    public const MODIFIER_STRENGTH = 2;
    public const MODIFIER_WEAKNESS = 3;
    public const MODIFIER_RESISTANCE = 4;
    public const MODIFIER_ABSORPTION = 5;
    public const MODIFIER_ARMOR_ENCHANTMENTS = 6;
    public const MODIFIER_CRITICAL = 7;
    public const MODIFIER_TOTEM = 8;
    public const MODIFIER_WEAPON_ENCHANTMENTS = 9;
    public const MODIFIER_PREVIOUS_DAMAGE_COOLDOWN = 10;
    public const MODIFIER_ARMOR_HELMET = 11;
 
    public const CAUSE_CONTACT = 0;
    public const CAUSE_ENTITY_ATTACK = 1;
    public const CAUSE_PROJECTILE = 2;
    public const CAUSE_SUFFOCATION = 3;
    public const CAUSE_FALL = 4;
    public const CAUSE_FIRE = 5;
    public const CAUSE_FIRE_TICK = 6;
    public const CAUSE_LAVA = 7;
    public const CAUSE_DROWNING = 8;
    public const CAUSE_BLOCK_EXPLOSION = 9;
    public const CAUSE_ENTITY_EXPLOSION = 10;
    public const CAUSE_VOID = 11;
    public const CAUSE_SUICIDE = 12;
    public const CAUSE_MAGIC = 13;
    public const CAUSE_CUSTOM = 14;
    public const CAUSE_STARVATION = 15;
    public const CAUSE_FALLING_BLOCK = 16;
 
    private float $baseDamage;
    private float $originalBase;
 
    private array $originals;
    private int $attackCooldown = 10;
 
    public function __construct(
        Entity $entity,
        private int $cause,
        float $damage,
        private array $modifiers = []
    ){
        $this->entity = $entity;
        $this->baseDamage = $this->originalBase = $damage;
        $this->originals = $modifiers;
    }
 
    public function getCause() : int{
        return $this->cause;
    }
 
    public function getBaseDamage() : float{
        return $this->baseDamage;
    }
 
    public function setBaseDamage(float $damage) : void{
        $this->baseDamage = $damage;
    }
 
    public function getOriginalBaseDamage() : float{
        return $this->originalBase;
    }
 
    public function getOriginalModifiers() : array{
        return $this->originals;
    }
 
    public function getOriginalModifier(int $type) : float{
        return $this->originals[$type] ?? 0.0;
    }
 
    public function getModifiers() : array{
        return $this->modifiers;
    }
 
    public function getModifier(int $type) : float{
        return $this->modifiers[$type] ?? 0.0;
    }
 
    public function setModifier(float $damage, int $type) : void{
        $this->modifiers[$type] = $damage;
    }
 
    public function isApplicable(int $type) : bool{
        return isset($this->modifiers[$type]);
    }
 
    public function getFinalDamage() : float{
        return max(0, $this->baseDamage + array_sum($this->modifiers));
    }
 
    public function canBeReducedByArmor() : bool{
        switch($this->cause){
            case self::CAUSE_FIRE_TICK:
            case self::CAUSE_SUFFOCATION:
            case self::CAUSE_DROWNING:
            case self::CAUSE_STARVATION:
            case self::CAUSE_FALL:
            case self::CAUSE_VOID:
            case self::CAUSE_MAGIC:
            case self::CAUSE_SUICIDE:
                return false;
 
        }
 
        return true;
    }
 
    public function getAttackCooldown() : int{
        return $this->attackCooldown;
    }
 
    public function setAttackCooldown(int $attackCooldown) : void{
        $this->attackCooldown = $attackCooldown;
    }
}