cn.nukkit.blockentity.BlockEntityEjectable Maven / Gradle / Ivy

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A Minecraft Bedrock Edition server software implementation made in Java from scratch which supports all new features.
There is a newer version: 1.6.0.1-PN
package cn.nukkit.blockentity;

import cn.nukkit.api.PowerNukkitOnly;
import cn.nukkit.api.Since;
import cn.nukkit.block.BlockAir;
import cn.nukkit.inventory.EjectableInventory;
import cn.nukkit.inventory.InventoryHolder;
import cn.nukkit.item.Item;
import cn.nukkit.item.ItemBlock;
import cn.nukkit.level.format.FullChunk;
import cn.nukkit.nbt.NBTIO;
import cn.nukkit.nbt.tag.CompoundTag;
import cn.nukkit.nbt.tag.ListTag;

@PowerNukkitOnly
@Since("1.4.0.0-PN")
public abstract class BlockEntityEjectable  extends BlockEntitySpawnable implements BlockEntityContainer, BlockEntityNameable, InventoryHolder {

    @PowerNukkitOnly
    @Since("1.4.0.0-PN")
    protected EjectableInventory inventory;

    @PowerNukkitOnly
    @Since("1.4.0.0-PN")
    public BlockEntityEjectable(FullChunk chunk, CompoundTag nbt) {
        super(chunk, nbt);
    }

    @PowerNukkitOnly
    @Since("1.4.0.0-PN")
    protected abstract EjectableInventory createInventory();
    
    protected abstract String getBlockEntityName();

    @Override
    protected void initBlockEntity() {
        this.inventory = createInventory();

        if (!this.namedTag.contains("Items") || !(this.namedTag.get("Items") instanceof ListTag)) {
            this.namedTag.putList(new ListTag("Items"));
        }

        for (int i = 0; i < this.getSize(); i++) {
            this.inventory.setItem(i, this.getItem(i));
        }

        super.initBlockEntity();
    }

    @Override
    public int getSize() {
        return 9;
    }

    protected int getSlotIndex(int index) {
        ListTag list = this.namedTag.getList("Items", CompoundTag.class);
        for (int i = 0; i < list.size(); i++) {
            if (list.get(i).getByte("Slot") == index) {
                return i;
            }
        }

        return -1;
    }

    @Override
    public Item getItem(int index) {
        int i = this.getSlotIndex(index);
        if (i < 0) {
            return new ItemBlock(new BlockAir(), 0, 0);
        } else {
            CompoundTag data = (CompoundTag) this.namedTag.getList("Items").get(i);
            return NBTIO.getItemHelper(data);
        }
    }

    @Override
    public void setItem(int index, Item item) {
        int i = this.getSlotIndex(index);

        CompoundTag d = NBTIO.putItemHelper(item, index);

        if (item.getId() == Item.AIR || item.getCount() <= 0) {
            if (i >= 0) {
                this.namedTag.getList("Items").getAll().remove(i);
            }
        } else if (i < 0) {
            (this.namedTag.getList("Items", CompoundTag.class)).add(d);
        } else {
            (this.namedTag.getList("Items", CompoundTag.class)).add(i, d);
        }
    }

    @Override
    public EjectableInventory getInventory() {
        return inventory;
    }

    @Override
    public CompoundTag getSpawnCompound() {
        CompoundTag c = new CompoundTag()
                .putString("id", getBlockEntityName())
                .putInt("x", (int) this.x)
                .putInt("y", (int) this.y)
                .putInt("z", (int) this.z);

        if (this.hasName()) {
            c.put("CustomName", this.namedTag.get("CustomName"));
        }

        return c;
    }

    @Override
    public void saveNBT() {
        this.namedTag.putList(new ListTag("Items"));
        for (int index = 0; index < this.getSize(); index++) {
            this.setItem(index, this.inventory.getItem(index));
        }

        super.saveNBT();
    }

    @Override
    public String getName() {
        return this.hasName() ? this.namedTag.getString("CustomName") : getBlockEntityName();
    }
    
    @Override
    public boolean hasName() {
        return this.namedTag.contains("CustomName");
    }

    @Override
    public void setName(String name) {
        if (name == null || name.equals("")) {
            this.namedTag.remove("CustomName");
            return;
        }

        this.namedTag.putString("CustomName", name);
    }

    @Override
    public void onBreak() {
        for (Item content : inventory.getContents().values()) {
            level.dropItem(this, content);
        }
    }
}