minecraft-src/net/minecraft/world/level/block/entity/ChestBlockEntity.java

package net.minecraft.world.level.block.entity;

import net.minecraft.core.BlockPos;
import net.minecraft.core.Direction;
import net.minecraft.core.HolderLookup;
import net.minecraft.core.NonNullList;
import net.minecraft.nbt.CompoundTag;
import net.minecraft.network.chat.Component;
import net.minecraft.sounds.SoundEvent;
import net.minecraft.sounds.SoundEvents;
import net.minecraft.sounds.SoundSource;
import net.minecraft.world.CompoundContainer;
import net.minecraft.world.Container;
import net.minecraft.world.ContainerHelper;
import net.minecraft.world.entity.player.Inventory;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.inventory.AbstractContainerMenu;
import net.minecraft.world.inventory.ChestMenu;
import net.minecraft.world.item.ItemStack;
import net.minecraft.world.level.BlockGetter;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.block.Block;
import net.minecraft.world.level.block.ChestBlock;
import net.minecraft.world.level.block.state.BlockState;
import net.minecraft.world.level.block.state.properties.ChestType;

public class ChestBlockEntity extends RandomizableContainerBlockEntity implements LidBlockEntity {
	private static final int EVENT_SET_OPEN_COUNT = 1;
	private NonNullList<ItemStack> items = NonNullList.withSize(27, ItemStack.EMPTY);
	private final ContainerOpenersCounter openersCounter = new ContainerOpenersCounter() {
		@Override
		protected void onOpen(Level level, BlockPos pos, BlockState state) {
			ChestBlockEntity.playSound(level, pos, state, SoundEvents.CHEST_OPEN);
		}

		@Override
		protected void onClose(Level level, BlockPos pos, BlockState state) {
			ChestBlockEntity.playSound(level, pos, state, SoundEvents.CHEST_CLOSE);
		}

		@Override
		protected void openerCountChanged(Level level, BlockPos pos, BlockState state, int count, int openCount) {
			ChestBlockEntity.this.signalOpenCount(level, pos, state, count, openCount);
		}

		@Override
		protected boolean isOwnContainer(Player player) {
			if (!(player.containerMenu instanceof ChestMenu)) {
				return false;
			} else {
				Container container = ((ChestMenu)player.containerMenu).getContainer();
				return container == ChestBlockEntity.this || container instanceof CompoundContainer && ((CompoundContainer)container).contains(ChestBlockEntity.this);
			}
		}
	};
	private final ChestLidController chestLidController = new ChestLidController();

	protected ChestBlockEntity(BlockEntityType<?> type, BlockPos pos, BlockState blockState) {
		super(type, pos, blockState);
	}

	public ChestBlockEntity(BlockPos pos, BlockState blockState) {
		this(BlockEntityType.CHEST, pos, blockState);
	}

	@Override
	public int getContainerSize() {
		return 27;
	}

	@Override
	protected Component getDefaultName() {
		return Component.translatable("container.chest");
	}

	@Override
	protected void loadAdditional(CompoundTag tag, HolderLookup.Provider registries) {
		super.loadAdditional(tag, registries);
		this.items = NonNullList.withSize(this.getContainerSize(), ItemStack.EMPTY);
		if (!this.tryLoadLootTable(tag)) {
			ContainerHelper.loadAllItems(tag, this.items, registries);
		}
	}

	@Override
	protected void saveAdditional(CompoundTag tag, HolderLookup.Provider registries) {
		super.saveAdditional(tag, registries);
		if (!this.trySaveLootTable(tag)) {
			ContainerHelper.saveAllItems(tag, this.items, registries);
		}
	}

	public static void lidAnimateTick(Level level, BlockPos pos, BlockState state, ChestBlockEntity blockEntity) {
		blockEntity.chestLidController.tickLid();
	}

	static void playSound(Level level, BlockPos pos, BlockState state, SoundEvent sound) {
		ChestType chestType = state.getValue(ChestBlock.TYPE);
		if (chestType != ChestType.LEFT) {
			double d = pos.getX() + 0.5;
			double e = pos.getY() + 0.5;
			double f = pos.getZ() + 0.5;
			if (chestType == ChestType.RIGHT) {
				Direction direction = ChestBlock.getConnectedDirection(state);
				d += direction.getStepX() * 0.5;
				f += direction.getStepZ() * 0.5;
			}

			level.playSound(null, d, e, f, sound, SoundSource.BLOCKS, 0.5F, level.random.nextFloat() * 0.1F + 0.9F);
		}
	}

	@Override
	public boolean triggerEvent(int id, int type) {
		if (id == 1) {
			this.chestLidController.shouldBeOpen(type > 0);
			return true;
		} else {
			return super.triggerEvent(id, type);
		}
	}

	@Override
	public void startOpen(Player player) {
		if (!this.remove && !player.isSpectator()) {
			this.openersCounter.incrementOpeners(player, this.getLevel(), this.getBlockPos(), this.getBlockState());
		}
	}

	@Override
	public void stopOpen(Player player) {
		if (!this.remove && !player.isSpectator()) {
			this.openersCounter.decrementOpeners(player, this.getLevel(), this.getBlockPos(), this.getBlockState());
		}
	}

	@Override
	protected NonNullList<ItemStack> getItems() {
		return this.items;
	}

	@Override
	protected void setItems(NonNullList<ItemStack> items) {
		this.items = items;
	}

	@Override
	public float getOpenNess(float partialTicks) {
		return this.chestLidController.getOpenness(partialTicks);
	}

	public static int getOpenCount(BlockGetter level, BlockPos pos) {
		BlockState blockState = level.getBlockState(pos);
		if (blockState.hasBlockEntity()) {
			BlockEntity blockEntity = level.getBlockEntity(pos);
			if (blockEntity instanceof ChestBlockEntity) {
				return ((ChestBlockEntity)blockEntity).openersCounter.getOpenerCount();
			}
		}

		return 0;
	}

	public static void swapContents(ChestBlockEntity chest, ChestBlockEntity otherChest) {
		NonNullList<ItemStack> nonNullList = chest.getItems();
		chest.setItems(otherChest.getItems());
		otherChest.setItems(nonNullList);
	}

	@Override
	protected AbstractContainerMenu createMenu(int containerId, Inventory inventory) {
		return ChestMenu.threeRows(containerId, inventory, this);
	}

	public void recheckOpen() {
		if (!this.remove) {
			this.openersCounter.recheckOpeners(this.getLevel(), this.getBlockPos(), this.getBlockState());
		}
	}

	protected void signalOpenCount(Level level, BlockPos pos, BlockState state, int eventId, int eventParam) {
		Block block = state.getBlock();
		level.blockEvent(pos, block, 1, eventParam);
	}
}