Client-side item

ClientsideItem.java

public class ClientsideItem extends ClientsideEntity {

    private final ClientsideHologram hitbox;
    private final List<PacketContainer> packets = new ArrayList<>();

    public ClientsideItem(Location location, ItemStack item) {
        hitbox = new ClientsideHologram(location, "", true);

        setup(item, location);
    }

    private void setup(ItemStack item, Location location) {
        packets.add(createSpawnPacket(location));
        packets.add(createMetadataPacket(item));
    }

    private PacketContainer createSpawnPacket(Location location) {
        WrapperPlayServerSpawnEntity packet = new WrapperPlayServerSpawnEntity();

        packet.setEntityID(getEntityId());
        packet.setX(location.getX());
        packet.setY(location.getY());
        packet.setZ(location.getZ());
        packet.setObjectData(0);
        packet.setOptionalSpeedX(0);
        packet.setOptionalSpeedY(0);
        packet.setOptionalSpeedZ(0);
        packet.setUniqueId(UUID.randomUUID());
        packet.getHandle().getEntityTypeModifier().writeSafely(0, EntityType.DROPPED_ITEM);

        return packet.getHandle();
    }

    private PacketContainer createMetadataPacket(ItemStack item) {
        WrapperPlayServerEntityMetadata wrapper = new WrapperPlayServerEntityMetadata();

        wrapper.setEntityID(getEntityId());

        String name = item.getItemMeta().getDisplayName();

        EasyMetadataPacket metadata = new EasyMetadataPacket(null);
        
        metadata.write(0, (byte) 0x00);
        metadata.write(1, 300);

        if (name.isEmpty())
            metadata.writeEmptyData(2, WrappedChatComponent.fromText(""));
        else
            metadata.writeOptional(2, WrappedChatComponent.fromText(name));

        metadata.write(3, !name.isEmpty());
        metadata.write(4, Boolean.FALSE);
        metadata.write(5, Boolean.TRUE);
        metadata.write(7, item);


        wrapper.setMetadata(metadata.export());

        return wrapper.getHandle();
    }

    @Override
    public void onClick(Consumer<ClickData> consumer) {
        hitbox.onClick(consumer);
    }

    public void show(Player player) {
        hitbox.show(player);
        for (PacketContainer packet : packets) {
            try {
                ProtocolLibrary.getProtocolManager().sendServerPacket(player, packet);
            } catch (InvocationTargetException e) {
                e.printStackTrace();
            }
        }
    }
}