@Override
 public Map<String, Tag> save(GlowItem entity) {
   Map<String, Tag> ret = super.save(entity);
   Map<String, Tag> itemTag = new HashMap<String, Tag>();
   itemTag.put("id", new ShortTag("id", (short) entity.getItemStack().getTypeId()));
   itemTag.put("Damage", new ShortTag("Damage", entity.getItemStack().getDurability()));
   itemTag.put("Count", new ByteTag("Count", (byte) entity.getItemStack().getAmount()));
   ret.put("Item", new CompoundTag("Item", itemTag));
   // ret.put("Health", new IntTag("Health", entity.getHealth()));
   // ret.put("Age", new IntTag("Age", entity.getAge()));
   return ret;
 }
 @Override
 public void load(GlowItem entity, CompoundTag compound) {
   if (compound.getValue().containsKey("Item")) {
     ItemStack stack = readItemStack((CompoundTag) compound.getValue().get("Item"));
     entity.setItemStack(stack);
   }
   if (compound.getValue().containsKey("Health")) {
     // item.setHealth(((IntTag)compound.getValue().get("Health")).getValue());
   }
   if (compound.getValue().containsKey("Age")) {
     // item.setAge(((IntTag)compound.getValue().get("Age")).getValue());
   }
 }
  @Override
  public void handle(GlowSession session, DiggingMessage message) {
    // Todo: Implement SHOOT_ARROW_FINISH_EATING
    // Todo: Implement SWAP_ITEM_IN_HAND
    GlowPlayer player = session.getPlayer();
    GlowWorld world = player.getWorld();
    GlowBlock block = world.getBlockAt(message.getX(), message.getY(), message.getZ());
    BlockFace face = BlockPlacementHandler.convertFace(message.getFace());
    ItemStack holding = player.getItemInHand();

    if (block.getRelative(face).getType() == Material.FIRE) {
      block.getRelative(face).breakNaturally();
      return; // returns to avoid breaking block in creative
    }

    boolean blockBroken = false;
    boolean revert = false;
    if (message.getState() == DiggingMessage.START_DIGGING || player.getDigging() == null) {
      // call interact event
      Action action = Action.LEFT_CLICK_BLOCK;
      Block eventBlock = block;
      if (player.getLocation().distanceSquared(block.getLocation()) > 36
          || block.getTypeId() == 0) {
        action = Action.LEFT_CLICK_AIR;
        eventBlock = null;
      }
      PlayerInteractEvent interactEvent =
          EventFactory.onPlayerInteract(player, action, eventBlock, face);

      // blocks don't get interacted with on left click, so ignore that
      // attempt to use item in hand, that is, dig up the block
      if (!BlockPlacementHandler.selectResult(interactEvent.useItemInHand(), true)) {
        // the event was cancelled, get out of here
        revert = true;
      } else if (player.getGameMode() != GameMode.SPECTATOR) {
        player.setDigging(null);
        // emit damage event - cancel by default if holding a sword
        boolean instaBreak =
            player.getGameMode() == GameMode.CREATIVE
                || block.getMaterialValues().getHardness() == 0;
        BlockDamageEvent damageEvent =
            new BlockDamageEvent(player, block, player.getItemInHand(), instaBreak);
        if (player.getGameMode() == GameMode.CREATIVE
            && holding != null
            && EnchantmentTarget.WEAPON.includes(holding.getType())) {
          damageEvent.setCancelled(true);
        }
        EventFactory.callEvent(damageEvent);

        // follow orders
        if (damageEvent.isCancelled()) {
          revert = true;
        } else {
          // in creative, break even if denied in the event, or the block
          // can never be broken (client does not send DONE_DIGGING).
          blockBroken = damageEvent.getInstaBreak();
          if (!blockBroken) {
            /// TODO: add a delay here based on hardness
            player.setDigging(block);
          }
        }
      }
    } else if (message.getState() == DiggingMessage.FINISH_DIGGING) {
      // shouldn't happen in creative mode

      // todo: verification against malicious clients
      blockBroken = block.equals(player.getDigging());

      if (blockBroken
          && holding.getType() != Material.AIR
          && holding.getDurability() != holding.getType().getMaxDurability()) {
        switch (block.getType()) {
          case GRASS:
          case DIRT:
          case SAND:
          case GRAVEL:
          case MYCEL:
          case SOUL_SAND:
            switch (holding.getType()) {
              case WOOD_SPADE:
              case STONE_SPADE:
              case IRON_SPADE:
              case GOLD_SPADE:
              case DIAMOND_SPADE:
                holding.setDurability((short) (holding.getDurability() + 1));
                break;
              default:
                holding.setDurability((short) (holding.getDurability() + 2));
                break;
            }
            break;
          case LOG:
          case LOG_2:
          case WOOD:
          case CHEST:
            switch (holding.getType()) {
              case WOOD_AXE:
              case STONE_AXE:
              case IRON_AXE:
              case GOLD_AXE:
              case DIAMOND_AXE:
                holding.setDurability((short) (holding.getDurability() + 1));
                break;
              default:
                holding.setDurability((short) (holding.getDurability() + 2));
                break;
            }
            break;
          case STONE:
          case COBBLESTONE:
            break;
          default:
            holding.setDurability((short) (holding.getDurability() + 2));
            break;
        }
        if (holding.getDurability() >= holding.getType().getMaxDurability()) {
          player.getInventory().remove(holding);
          // player.getItemInHand().setType(Material.AIR);
        }
      }
      player.setDigging(null);
    } else if (message.getState() == DiggingMessage.STATE_DROP_ITEM) {
      player.dropItemInHand(false);
      return;
    } else if (message.getState() == DiggingMessage.STATE_DROP_ITEMSTACK) {
      player.dropItemInHand(true);
      return;
    } else if (message.getState() == DiggingMessage.STATE_SHOT_ARROW_FINISH_EATING
        && player.getUsageItem() != null) {
      if (player.getUsageItem().equals(holding)) {
        ItemType type = ItemTable.instance().getItem(player.getUsageItem().getType());
        ((ItemTimedUsage) type).endUse(player, player.getUsageItem());
      } else {
        // todo: verification against malicious clients
        // todo: inform player their item is wrong
      }
      return;
    } else {
      return;
    }

    if (blockBroken && !revert) {
      // fire the block break event
      BlockBreakEvent breakEvent = EventFactory.callEvent(new BlockBreakEvent(block, player));
      if (breakEvent.isCancelled()) {
        BlockPlacementHandler.revert(player, block);
        return;
      }

      BlockType blockType = ItemTable.instance().getBlock(block.getType());
      if (blockType != null) {
        blockType.blockDestroy(player, block, face);
      }

      // destroy the block
      if (!block.isEmpty()
          && !block.isLiquid()
          && player.getGameMode() != GameMode.CREATIVE
          && world.getGameRuleMap().getBoolean("doTileDrops")) {
        for (ItemStack drop : block.getDrops(holding)) {
          GlowItem item = world.dropItemNaturally(block.getLocation(), drop);
          item.setPickupDelay(30);
          item.setBias(player);
        }
      }

      player.addExhaustion(0.025f);

      // STEP_SOUND actually is the block break particles
      world.playEffectExceptTo(
          block.getLocation(), Effect.STEP_SOUND, block.getTypeId(), 64, player);
      GlowBlockState state = block.getState();
      block.setType(Material.AIR);
      if (blockType != null) {
        blockType.afterDestroy(player, block, face, state);
      }
    } else if (revert) {
      // replace the block that wasn't really dug
      BlockPlacementHandler.revert(player, block);
    } else if (block.getType() != Material.AIR) {
      BlockType blockType = ItemTable.instance().getBlock(block.getType());
      blockType.leftClickBlock(player, block, holding);
    }
  }