mirror of
https://github.com/pmmp/PocketMine-MP.git
synced 2025-08-21 10:51:24 +00:00
354 lines
11 KiB
PHP
354 lines
11 KiB
PHP
<?php
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/*
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*
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* ____ _ _ __ __ _ __ __ ____
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* | _ \ ___ ___| | _____| |_| \/ (_)_ __ ___ | \/ | _ \
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* | |_) / _ \ / __| |/ / _ \ __| |\/| | | '_ \ / _ \_____| |\/| | |_) |
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* | __/ (_) | (__| < __/ |_| | | | | | | | __/_____| | | | __/
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* |_| \___/ \___|_|\_\___|\__|_| |_|_|_| |_|\___| |_| |_|_|
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* @author PocketMine Team
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* @link http://www.pocketmine.net/
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*
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*
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*/
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declare(strict_types=1);
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namespace pocketmine\entity\object;
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use pocketmine\entity\animation\ItemEntityStackSizeChangeAnimation;
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use pocketmine\entity\Entity;
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use pocketmine\entity\EntitySizeInfo;
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use pocketmine\entity\Location;
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use pocketmine\event\entity\EntityItemPickupEvent;
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use pocketmine\event\entity\ItemDespawnEvent;
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use pocketmine\event\entity\ItemMergeEvent;
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use pocketmine\event\entity\ItemSpawnEvent;
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use pocketmine\item\Item;
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use pocketmine\math\Vector3;
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use pocketmine\nbt\tag\CompoundTag;
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use pocketmine\network\mcpe\EntityEventBroadcaster;
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use pocketmine\network\mcpe\NetworkBroadcastUtils;
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use pocketmine\network\mcpe\protocol\AddItemActorPacket;
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use pocketmine\network\mcpe\protocol\types\entity\EntityIds;
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use pocketmine\network\mcpe\protocol\types\inventory\ItemStackWrapper;
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use pocketmine\player\Player;
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use pocketmine\timings\Timings;
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use function max;
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class ItemEntity extends Entity{
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private const TAG_HEALTH = "Health"; //TAG_Short
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private const TAG_AGE = "Age"; //TAG_Short
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private const TAG_PICKUP_DELAY = "PickupDelay"; //TAG_Short
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private const TAG_OWNER = "Owner"; //TAG_String
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private const TAG_THROWER = "Thrower"; //TAG_String
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public const TAG_ITEM = "Item"; //TAG_Compound
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public static function getNetworkTypeId() : string{ return EntityIds::ITEM; }
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public const MERGE_CHECK_PERIOD = 2; //0.1 seconds
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public const DEFAULT_DESPAWN_DELAY = 6000; //5 minutes
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public const NEVER_DESPAWN = -1;
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public const MAX_DESPAWN_DELAY = 32767 + self::DEFAULT_DESPAWN_DELAY; //max value storable by mojang NBT :(
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protected string $owner = "";
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protected string $thrower = "";
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protected int $pickupDelay = 0;
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protected int $despawnDelay = self::DEFAULT_DESPAWN_DELAY;
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protected Item $item;
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public function __construct(Location $location, Item $item, ?CompoundTag $nbt = null){
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if($item->isNull()){
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throw new \InvalidArgumentException("Item entity must have a non-air item with a count of at least 1");
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}
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$this->item = clone $item;
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parent::__construct($location, $nbt);
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}
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protected function getInitialSizeInfo() : EntitySizeInfo{ return new EntitySizeInfo(0.25, 0.25); }
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protected function getInitialDragMultiplier() : float{ return 0.02; }
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protected function getInitialGravity() : float{ return 0.04; }
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protected function initEntity(CompoundTag $nbt) : void{
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parent::initEntity($nbt);
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$this->setMaxHealth(5);
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$this->setHealth($nbt->getShort(self::TAG_HEALTH, (int) $this->getHealth()));
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$age = $nbt->getShort(self::TAG_AGE, 0);
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if($age === -32768){
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$this->despawnDelay = self::NEVER_DESPAWN;
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}else{
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$this->despawnDelay = max(0, self::DEFAULT_DESPAWN_DELAY - $age);
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}
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$this->pickupDelay = $nbt->getShort(self::TAG_PICKUP_DELAY, $this->pickupDelay);
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$this->owner = $nbt->getString(self::TAG_OWNER, $this->owner);
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$this->thrower = $nbt->getString(self::TAG_THROWER, $this->thrower);
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}
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protected function onFirstUpdate(int $currentTick) : void{
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(new ItemSpawnEvent($this))->call(); //this must be called before EntitySpawnEvent, to maintain backwards compatibility
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parent::onFirstUpdate($currentTick);
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}
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protected function entityBaseTick(int $tickDiff = 1) : bool{
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if($this->closed){
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return false;
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}
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Timings::$itemEntityBaseTick->startTiming();
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try{
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$hasUpdate = parent::entityBaseTick($tickDiff);
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if($this->isFlaggedForDespawn()){
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return $hasUpdate;
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}
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if($this->pickupDelay !== self::NEVER_DESPAWN && $this->pickupDelay > 0){ //Infinite delay
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$hasUpdate = true;
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$this->pickupDelay -= $tickDiff;
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if($this->pickupDelay < 0){
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$this->pickupDelay = 0;
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}
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}
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if($this->hasMovementUpdate() && $this->isMergeCandidate() && $this->despawnDelay % self::MERGE_CHECK_PERIOD === 0){
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$mergeable = [$this]; //in case the merge target ends up not being this
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$mergeTarget = $this;
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foreach($this->getWorld()->getNearbyEntities($this->boundingBox->expandedCopy(0.5, 0.5, 0.5), $this) as $entity){
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if(!$entity instanceof ItemEntity || $entity->isFlaggedForDespawn()){
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continue;
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}
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if($entity->isMergeable($this)){
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$mergeable[] = $entity;
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if($entity->item->getCount() > $mergeTarget->item->getCount()){
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$mergeTarget = $entity;
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}
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}
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}
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foreach($mergeable as $itemEntity){
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if($itemEntity !== $mergeTarget){
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$itemEntity->tryMergeInto($mergeTarget);
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}
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}
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}
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if(!$this->isFlaggedForDespawn() && $this->despawnDelay !== self::NEVER_DESPAWN){
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$hasUpdate = true;
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$this->despawnDelay -= $tickDiff;
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if($this->despawnDelay <= 0){
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$ev = new ItemDespawnEvent($this);
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$ev->call();
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if($ev->isCancelled()){
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$this->despawnDelay = self::DEFAULT_DESPAWN_DELAY;
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}else{
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$this->flagForDespawn();
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}
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}
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}
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return $hasUpdate;
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}finally{
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Timings::$itemEntityBaseTick->stopTiming();
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}
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}
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private function isMergeCandidate() : bool{
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return $this->pickupDelay !== self::NEVER_DESPAWN && $this->item->getCount() < $this->item->getMaxStackSize();
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}
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/**
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* Returns whether this item entity can merge with the given one.
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*/
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public function isMergeable(ItemEntity $entity) : bool{
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if(!$this->isMergeCandidate() || !$entity->isMergeCandidate()){
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return false;
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}
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$item = $entity->item;
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return $entity !== $this && $item->canStackWith($this->item) && $item->getCount() + $this->item->getCount() <= $item->getMaxStackSize();
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}
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/**
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* Attempts to merge this item entity into the given item entity. Returns true if it was successful.
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*/
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public function tryMergeInto(ItemEntity $consumer) : bool{
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if(!$this->isMergeable($consumer)){
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return false;
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}
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$ev = new ItemMergeEvent($this, $consumer);
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$ev->call();
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if($ev->isCancelled()){
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return false;
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}
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$consumer->setStackSize($consumer->item->getCount() + $this->item->getCount());
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$this->flagForDespawn();
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$consumer->pickupDelay = max($consumer->pickupDelay, $this->pickupDelay);
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$consumer->despawnDelay = max($consumer->despawnDelay, $this->despawnDelay);
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return true;
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}
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protected function tryChangeMovement() : void{
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$this->checkObstruction($this->location->x, $this->location->y, $this->location->z);
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parent::tryChangeMovement();
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}
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protected function applyDragBeforeGravity() : bool{
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return true;
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}
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public function canSaveWithChunk() : bool{
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return !$this->item->isNull() && parent::canSaveWithChunk();
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}
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public function saveNBT() : CompoundTag{
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$nbt = parent::saveNBT();
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$nbt->setTag(self::TAG_ITEM, $this->item->nbtSerialize());
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$nbt->setShort(self::TAG_HEALTH, (int) $this->getHealth());
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if($this->despawnDelay === self::NEVER_DESPAWN){
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$age = -32768;
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}else{
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$age = self::DEFAULT_DESPAWN_DELAY - $this->despawnDelay;
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}
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$nbt->setShort(self::TAG_AGE, $age);
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$nbt->setShort(self::TAG_PICKUP_DELAY, $this->pickupDelay);
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$nbt->setString(self::TAG_OWNER, $this->owner);
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$nbt->setString(self::TAG_THROWER, $this->thrower);
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return $nbt;
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}
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public function getItem() : Item{
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return $this->item;
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}
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public function isFireProof() : bool{
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return $this->item->isFireProof();
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}
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public function canCollideWith(Entity $entity) : bool{
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return false;
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}
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public function canBeCollidedWith() : bool{
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return false;
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}
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public function getPickupDelay() : int{
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return $this->pickupDelay;
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}
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public function setPickupDelay(int $delay) : void{
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$this->pickupDelay = $delay;
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}
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/**
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* Returns the number of ticks left before this item will despawn. If -1, the item will never despawn.
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*/
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public function getDespawnDelay() : int{
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return $this->despawnDelay;
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}
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/**
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* @throws \InvalidArgumentException
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*/
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public function setDespawnDelay(int $despawnDelay) : void{
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if(($despawnDelay < 0 || $despawnDelay > self::MAX_DESPAWN_DELAY) && $despawnDelay !== self::NEVER_DESPAWN){
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throw new \InvalidArgumentException("Despawn ticker must be in range 0 ... " . self::MAX_DESPAWN_DELAY . " or " . self::NEVER_DESPAWN . ", got $despawnDelay");
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}
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$this->despawnDelay = $despawnDelay;
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}
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public function getOwner() : string{
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return $this->owner;
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}
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public function setOwner(string $owner) : void{
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$this->owner = $owner;
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}
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public function getThrower() : string{
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return $this->thrower;
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}
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public function setThrower(string $thrower) : void{
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$this->thrower = $thrower;
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}
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protected function sendSpawnPacket(Player $player) : void{
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$networkSession = $player->getNetworkSession();
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$networkSession->sendDataPacket(AddItemActorPacket::create(
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$this->getId(), //TODO: entity unique ID
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$this->getId(),
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ItemStackWrapper::legacy($networkSession->getTypeConverter()->coreItemStackToNet($this->getItem())),
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$this->location->asVector3(),
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$this->getMotion(),
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$this->getAllNetworkData(),
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false //TODO: I have no idea what this is needed for, but right now we don't support fishing anyway
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));
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}
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public function setStackSize(int $newCount) : void{
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if($newCount <= 0){
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throw new \InvalidArgumentException("Stack size must be at least 1");
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}
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$this->item->setCount($newCount);
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$this->broadcastAnimation(new ItemEntityStackSizeChangeAnimation($this, $newCount));
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}
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public function getOffsetPosition(Vector3 $vector3) : Vector3{
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return $vector3->add(0, 0.125, 0);
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}
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public function onCollideWithPlayer(Player $player) : void{
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if($this->getPickupDelay() !== 0){
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return;
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}
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$item = $this->getItem();
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$playerInventory = match(true){
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$player->getOffHandInventory()->getItem(0)->canStackWith($item) && $player->getOffHandInventory()->getAddableItemQuantity($item) > 0 => $player->getOffHandInventory(),
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$player->getInventory()->getAddableItemQuantity($item) > 0 => $player->getInventory(),
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default => null
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};
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$ev = new EntityItemPickupEvent($player, $this, $item, $playerInventory);
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if($player->hasFiniteResources() && $playerInventory === null){
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$ev->cancel();
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}
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$ev->call();
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if($ev->isCancelled()){
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return;
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}
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NetworkBroadcastUtils::broadcastEntityEvent(
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$this->getViewers(),
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fn(EntityEventBroadcaster $broadcaster, array $recipients) => $broadcaster->onPickUpItem($recipients, $player, $this)
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);
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$inventory = $ev->getInventory();
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if($inventory !== null){
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foreach($inventory->addItem($ev->getItem()) as $remains){
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$this->getWorld()->dropItem($this->location, $remains, new Vector3(0, 0, 0));
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}
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}
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$this->flagForDespawn();
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}
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}
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