error that I can't understand

I have no experience in PHP at all, I need some help in resolving this issue


The code


?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 sys\arenapvp\utils;


use pocketmine\entity\Entity;
use pocketmine\event\entity\EntityShootBowEvent;
use pocketmine\event\entity\ProjectileLaunchEvent;
use pocketmine\item\enchantment\Enchantment;
use pocketmine\item\Item;
use pocketmine\item\Tool;
use pocketmine\level\sound\LaunchSound;
use pocketmine\nbt\tag\CompoundTag;
use pocketmine\nbt\tag\DoubleTag;
use pocketmine\nbt\tag\FloatTag;
use pocketmine\nbt\tag\ListTag;
use pocketmine\nbt\tag\ShortTag;
use pocketmine\network\mcpe\protocol\LevelSoundEventPacket;
use pocketmine\Player;

/*
* Message to all, this is here because Pocketmine doesn't support the Infinity enchantment.
*/
class CustomBow extends Tool {

public function onReleaseUsing(Player $player) : bool{
/** @var Item $arrow */
$arrow = null;
if(($index = $player->getInventory()->first(self::get(self::ARROW, -1, 1))) === -1){
if($player->isSurvival()){
return false;
}else {
$arrow = Item::get(Item::ARROW, 0, 1); //Default to a normal arrow for creative
}
}else{ //TODO: check offhand slot first (MCPE 1.1)
$arrow = $player->getInventory()->getItem($index);
$arrow->setCount(1);
}

//TODO: add effects for tipped arrows

$vector = $player->getDirectionVector();

$nbt = new CompoundTag("", [
new ListTag("Pos", [
new DoubleTag("", $player->x),
new DoubleTag("", $player->y + $player->getEyeHeight() + 0.25),
new DoubleTag("", $player->z)
]),
new ListTag("Motion", [
new DoubleTag("", $vector->x),
new DoubleTag("", $vector->y),
new DoubleTag("", $vector->z)
]),
new ListTag("Rotation", [
new FloatTag("", ($player->yaw > 180 ? 360 : 0) - $player->yaw),
new FloatTag("", -$player->pitch)
]),
new ShortTag("Fire", $player->isOnFire() ? 45 * 60 : 0)
//TODO: add Power and Flame enchantment effects
]);

$diff = $player->getItemUseDuration();
$p = $diff / 20;
$f = min((($p ** 2) + $p * 2) / 3, 1) * 2;
$ev = new EntityShootBowEvent($player, $this, Entity::createEntity("Arrow", $player->getLevel(), $nbt, $player, $f == 2), $f);

if($f < 0.05 or $diff < 7){
$ev->setCancelled();
}

$player->getServer()->getPluginManager()->callEvent($ev);

if($ev->isCancelled()){
$ev->getProjectile()->close();
return false;
}else{
$player->getLevel()->broadcastLevelSoundEvent($player, LevelSoundEventPacket::SOUND_BOW);
$ev->getProjectile()->setMotion($ev->getProjectile()->getMotion()->multiply($ev->getForce()));
if($player->isSurvival()) {
if(!$this->hasEnchantment(Enchantment::INFINITY)) {
$player->getInventory()->removeItem($arrow);
}
$this->meta++;
}
if($ev->getProjectile() instanceof Projectile){
$player->getServer()->getPluginManager()->callEvent($projectileEv = new ProjectileLaunchEvent($ev->getProjectile()));
if($projectileEv->isCancelled()){
$ev->getProjectile()->close();
}else{
$ev->getProjectile()->spawnToAll();
$player->getLevel()->addSound(new LaunchSound($player), $player->getViewers());
}
}else{
$ev->getProjectile()->spawnToAll();
}
}

return true;
}
}










The crashdump

Error: Class sys\arenapvp\utils\CustomBow contains 1 abstract method and must therefore be declared abstract or implement the remaining methods (pocketmine\item\Durable::getMaxDurability)
File: plugins/ArenaPvP-master/src/sys/arenapvp/utils/CustomBow
Line: 122
Type: E_ERROR

 

just add this function

PHP:

public function getMaxDurability():int{
return 384;//durability for bow
}


 

what line do I insert the code into, I get an error saying unexpected 'public'

 

add it before the last closing curly bracket }

 

thanks for the help but now I get this error

PHP:

[12:54:29] [Server thread/INFO]: Loading ArenaPvP v1.2.0
[12:54:29] [Server thread/INFO]: [ArenaPvP] There are no arenas to load!
[12:54:29] [Server thread/CRITICAL]: RuntimeException: "Trying to overwrite an already registered item" (EXCEPTION) in "src/pocketmine/item/ItemFactory" at line 298

 

You are trying to overwrite an existing item, read the error