private static void closeInventory(final Player p) {
   new BukkitRunnable() {
     @Override
     public void run() {
       p.closeInventory();
     }
   }.runTaskLater(BetterChunkLoader.instance(), 1L);
 }
  @EventHandler(ignoreCancelled = true, priority = EventPriority.HIGH)
  void onBlockBreak(BlockBreakEvent event) {
    Block block = event.getBlock();
    if (block == null
        || (block.getType() != instance.config().alwaysOnMaterial
            && block.getType() != instance.config().onlineOnlyMaterial)) {
      return;
    }

    CChunkLoader chunkLoader =
        DataStoreManager.getDataStore().getChunkLoaderAt(new BlockLocation(block.getLocation()));
    if (chunkLoader == null) {
      return;
    }

    DataStoreManager.getDataStore().removeChunkLoader(chunkLoader);

    Player player = event.getPlayer();
    player.sendMessage(Messages.get("Removed"));

    Player owner = chunkLoader.getPlayer();
    if (owner != null && player != owner) {
      owner.sendMessage(
          Messages.get("RemovedBy")
              .replace("[location]", chunkLoader.getLoc().toString())
              .replace("[player]", player.getDisplayName()));
    }

    BetterChunkLoader.instance()
        .getLogger()
        .info(
            player.getName()
                + " broke "
                + chunkLoader.getOwnerName()
                + "'s chunk loader at "
                + chunkLoader.getLocationString());
  }
 static boolean canBreak(Block block, Player player) {
   BlockBreakEvent bbe = new BlockBreakEvent(block, player);
   BetterChunkLoader.instance().getServer().getPluginManager().callEvent(bbe);
   return !bbe.isCancelled();
 }
  @EventHandler(ignoreCancelled = true, priority = EventPriority.MONITOR)
  void onPlayerInteract(PlayerInteractEvent event) {
    Action action = event.getAction();
    Player player = event.getPlayer();
    Block clickedBlock = event.getClickedBlock();

    if (clickedBlock == null || player == null) {
      return;
    }

    if (clickedBlock.getType() == instance.config().alwaysOnMaterial
        || clickedBlock.getType() == instance.config().onlineOnlyMaterial) {
      if (action == Action.RIGHT_CLICK_BLOCK) {
        CChunkLoader chunkLoader =
            DataStoreManager.getDataStore()
                .getChunkLoaderAt(new BlockLocation(clickedBlock.getLocation()));
        if (player.getItemInHand().getType() == Material.BLAZE_ROD) {
          if (chunkLoader != null) {
            if (player.getUniqueId().equals(chunkLoader.getOwner())
                || player.hasPermission("betterchunkloader.edit")
                || (chunkLoader.isAdminChunkLoader()
                    && player.hasPermission("betterchunkloader.adminloader"))) {
              chunkLoader.showUI(player);
            } else {
              player.sendMessage(Messages.get("CantEditOthersChunkLoaders"));
            }
          } else {
            if (canBreak(clickedBlock, player)) {
              UUID uid = player.getUniqueId();
              if (clickedBlock.getType() == instance.config().alwaysOnMaterial) {
                if (!player.hasPermission("betterchunkloader.alwayson")) {
                  player.sendMessage(
                      Messages.get("NoPermissionToCreateAlwaysOnChunkLoaders")
                          + (player.isOp() ? " (betterchunkloader.alwayson is needed)" : ""));
                  return;
                }
                if (player.isSneaking() && player.hasPermission("betterchunkloader.adminloader")) {
                  uid = CChunkLoader.adminUUID;
                }
              } else if (clickedBlock.getType() == instance.config().onlineOnlyMaterial) {
                if (!player.hasPermission("betterchunkloader.onlineonly")) {
                  player.sendMessage(
                      Messages.get("NoPermissionToCreateOnlineOnlyChunkLoaders")
                          + (player.isOp() ? " (betterchunkloader.onlineonly is needed)" : ""));
                  return;
                }
              } else {
                return;
              }

              chunkLoader =
                  new CChunkLoader(
                      (int) (Math.floor(clickedBlock.getX() / 16.00)),
                      (int) (Math.floor(clickedBlock.getZ() / 16.00)),
                      clickedBlock.getWorld().getName(),
                      (byte) -1,
                      uid,
                      new BlockLocation(clickedBlock),
                      null,
                      clickedBlock.getType() == instance.config().alwaysOnMaterial);
              chunkLoader.showUI(player);
            } else {
              player.sendMessage(Messages.get("NoBuildPermission"));
            }
          }
        } else {
          if (chunkLoader != null) {
            player.sendMessage(chunkLoader.info());
            if (player.isSneaking()) {
              chunkLoader.showCorners(player);
            }
          } else {
            if (player.getItemInHand().getType() != instance.config().alwaysOnMaterial
                && player.getItemInHand().getType() != instance.config().onlineOnlyMaterial) {
              player.sendMessage(Messages.get("CanCreateChunkLoaders"));
            }
          }
        }
      }
    }
  }
  @EventHandler(ignoreCancelled = true)
  void onInventoryClick(InventoryClickEvent event) {
    if (event.getInventory().getHolder() instanceof CChunkLoader
        && event.getWhoClicked() instanceof Player) {
      Player player = (Player) event.getWhoClicked();

      event.setCancelled(true);
      CChunkLoader chunkLoader = (CChunkLoader) event.getInventory().getHolder();
      if (chunkLoader == null) {
        return;
      }

      if (chunkLoader.isAdminChunkLoader()) {
        if (!player.hasPermission("betterchunkloader.adminloader")) {
          player.sendMessage(Messages.get("PermissionDenied"));
          return;
        }
      } else {
        if (!player.getUniqueId().equals(chunkLoader.getOwner())
            && !player.hasPermission("betterchunkloader.edit")) {
          player.sendMessage(Messages.get("CantEditOthersChunkLoaders"));
          return;
        }
      }

      byte pos = (byte) event.getRawSlot();
      if (chunkLoader.getRange() != -1) {
        if (pos == 0) {
          // remove the chunk loader
          DataStoreManager.getDataStore().removeChunkLoader(chunkLoader);
          closeInventory(player);
        } else if (pos > 1 && pos < 7) {
          // change range
          pos -= 2;

          // if higher range, check if the player has enough free chunks
          if (!chunkLoader.isAdminChunkLoader()
              && !player.hasPermission("betterchunkloader.unlimitedchunks")) {
            if (pos > chunkLoader.getRange()) {
              int needed = ((1 + (pos * 2)) * (1 + (pos * 2))) - chunkLoader.size();
              int available;
              if (chunkLoader.isAlwaysOn()) {
                available =
                    DataStoreManager.getDataStore()
                        .getAlwaysOnFreeChunksAmount(chunkLoader.getOwner());
              } else {
                available =
                    DataStoreManager.getDataStore()
                        .getOnlineOnlyFreeChunksAmount(chunkLoader.getOwner());
              }

              if (needed > available) {
                player.sendMessage(
                    Messages.get("NotEnoughChunks")
                        .replace("[needed]", needed + "")
                        .replace("[available]", available + ""));
                closeInventory(player);
                return;
              }
            }
          }

          BetterChunkLoader.instance()
              .getLogger()
              .info(
                  player.getName()
                      + " edited "
                      + chunkLoader.getOwnerName()
                      + "'s chunk loader at "
                      + chunkLoader.getLocationString()
                      + " range from "
                      + chunkLoader.getRange()
                      + " to "
                      + pos);
          DataStoreManager.getDataStore().changeChunkLoaderRange(chunkLoader, pos);
          player.sendMessage(Messages.get("ChunkLoaderUpdated"));
          closeInventory(player);
        }
      } else if (pos > 1 && pos < 7) {
        pos -= 2;

        if (!chunkLoader.isAdminChunkLoader()
            && !player.hasPermission("betterchunkloader.unlimitedchunks")) {
          int needed = (1 + (pos * 2)) * (1 + (pos * 2));
          int available;
          if (chunkLoader.isAlwaysOn()) {
            available =
                DataStoreManager.getDataStore().getAlwaysOnFreeChunksAmount(chunkLoader.getOwner());
          } else {
            available =
                DataStoreManager.getDataStore()
                    .getOnlineOnlyFreeChunksAmount(chunkLoader.getOwner());
          }

          if (needed > available) {
            player.sendMessage(
                Messages.get("NotEnoughChunks")
                    .replace("[needed]", needed + "")
                    .replace("[available]", available + ""));
            closeInventory(player);
            return;
          }
        }

        chunkLoader.setRange(pos);
        chunkLoader.setCreationDate(new Date());
        BetterChunkLoader.instance()
            .getLogger()
            .info(
                player.getName()
                    + " made a new "
                    + (chunkLoader.isAdminChunkLoader() ? "admin " : "")
                    + "chunk loader at "
                    + chunkLoader.getLocationString()
                    + " with range "
                    + pos);
        DataStoreManager.getDataStore().addChunkLoader(chunkLoader);
        closeInventory(player);
        player.sendMessage(Messages.get("ChunkLoaderCreated"));
      }
    }
  }