Implement cauldrons (#5163)

the following things are currently not implemented:

- particle/sound effects when an entity extinguishes itself
- particle/sound effects when mixing different stuff in a cauldron
- powder snow cauldron

both of these things are contingent on #5169, but for the time being, the PR is functionally complete and I want to move on to something else without being stalled by the particle+sound problem (which I haven't yet decided how to solve).

src/block/LavaCauldron.php

@@ -0,0 +1,88 @@
+<?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\block;
+
+use pocketmine\block\tile\Cauldron as TileCauldron;
+use pocketmine\entity\Entity;
+use pocketmine\event\entity\EntityCombustByBlockEvent;
+use pocketmine\event\entity\EntityDamageByBlockEvent;
+use pocketmine\event\entity\EntityDamageEvent;
+use pocketmine\item\Item;
+use pocketmine\item\ItemTypeIds;
+use pocketmine\item\VanillaItems;
+use pocketmine\math\Vector3;
+use pocketmine\player\Player;
+use pocketmine\world\sound\CauldronEmptyLavaSound;
+use pocketmine\world\sound\CauldronFillLavaSound;
+use pocketmine\world\sound\Sound;
+use function assert;
+
+final class LavaCauldron extends FillableCauldron{
+
+	public function writeStateToWorld() : void{
+		parent::writeStateToWorld();
+		$tile = $this->position->getWorld()->getTile($this->position);
+		assert($tile instanceof TileCauldron);
+
+		$tile->setCustomWaterColor(null);
+		$tile->setPotionItem(null);
+	}
+
+	public function getLightLevel() : int{
+		return 15;
+	}
+
+	public function getFillSound() : Sound{
+		return new CauldronFillLavaSound();
+	}
+
+	public function getEmptySound() : Sound{
+		return new CauldronEmptyLavaSound();
+	}
+
+	public function onInteract(Item $item, int $face, Vector3 $clickVector, ?Player $player = null, array &$returnedItems = []) : bool{
+		match($item->getTypeId()){
+			ItemTypeIds::BUCKET => $this->removeFillLevels(self::MAX_FILL_LEVEL, $item, VanillaItems::LAVA_BUCKET(), $returnedItems),
+			ItemTypeIds::POWDER_SNOW_BUCKET, ItemTypeIds::WATER_BUCKET => $this->mix($item, VanillaItems::BUCKET(), $returnedItems),
+			ItemTypeIds::LINGERING_POTION, ItemTypeIds::POTION, ItemTypeIds::SPLASH_POTION => $this->mix($item, VanillaItems::GLASS_BOTTLE(), $returnedItems),
+			default => null
+		};
+		return true;
+	}
+
+	public function hasEntityCollision() : bool{ return true; }
+
+	public function onEntityInside(Entity $entity) : bool{
+		$ev = new EntityDamageByBlockEvent($this, $entity, EntityDamageEvent::CAUSE_LAVA, 4);
+		$entity->attack($ev);
+
+		$ev = new EntityCombustByBlockEvent($this, $entity, 8);
+		$ev->call();
+		if(!$ev->isCancelled()){
+			$entity->setOnFire($ev->getDuration());
+		}
+
+		return true;
+	}
+}