content: package net.minecraft.command;
  
  import com.google.common.collect.Maps;
  import net.minecraft.block.Block;
  import net.minecraft.entity.Entity;
  import net.minecraft.entity.player.EntityPlayer;
  import net.minecraft.init.Blocks;
  import net.minecraft.inventory.IInventory;
  import net.minecraft.item.Item;
  import net.minecraft.item.ItemStack;
  import net.minecraft.nbt.JsonToNBT;
  import net.minecraft.nbt.NBTException;
  import net.minecraft.server.MinecraftServer;
  import net.minecraft.tileentity.TileEntity;
  import net.minecraft.util.BlockPos;
  import net.minecraft.world.World;
  
  import java.util.List;
  import java.util.Map;
  
  public class CommandReplaceItem extends CommandBase {
      private static final Map<String, Integer> SHORTCUTS = Maps.newHashMap();
  
      public String getCommandName() {
          return "replaceitem";
      }
  
      public int getRequiredPermissionLevel() {
          return 2;
      }
  
      public String getCommandUsage(ICommandSender sender) {
          return "commands.replaceitem.usage";
      }
  
      public void processCommand(ICommandSender sender, String[] args) throws CommandException {
          if (args.length < 1) {
              throw new WrongUsageException("commands.replaceitem.usage");
          } else {
              boolean flag;
  
              if (args[0].equals("entity")) {
                  flag = false;
              } else {
                  if (!args[0].equals("block")) {
                      throw new WrongUsageException("commands.replaceitem.usage");
                  }
  
                  flag = true;
              }
  
              int i;
  
              if (flag) {
                  if (args.length < 6) {
                      throw new WrongUsageException("commands.replaceitem.block.usage");
                  }
  
                  i = 4;
              } else {
                  if (args.length < 4) {
                      throw new WrongUsageException("commands.replaceitem.entity.usage");
                  }
  
                  i = 2;
              }
  
              int j = this.getSlotForShortcut(args[i++]);
              Item item;
  
              try {
                  item = getItemByText(sender, args[i]);
              } catch (NumberInvalidException numberinvalidexception) {
                  if (Block.getBlockFromName(args[i]) != Blocks.air) {
                      throw numberinvalidexception;
                  }
  
                  item = null;
              }
  
              ++i;
              int k = args.length > i ? parseInt(args[i++], 1, 64) : 1;
              int l = args.length > i ? parseInt(args[i++]) : 0;
              ItemStack itemstack = new ItemStack(item, k, l);
  
              if (args.length > i) {
                  String s = getChatComponentFromNthArg(sender, args, i).getUnformattedText();
  
                  try {
                      itemstack.setTagCompound(JsonToNBT.getTagFromJson(s));
                  } catch (NBTException nbtexception) {
                      throw new CommandException("commands.replaceitem.tagError", nbtexception.getMessage());
                  }
              }
  
              if (itemstack.getItem() == null) {
                  itemstack = null;
              }
  
              if (flag) {
                  sender.setCommandStat(CommandResultStats.Type.AFFECTED_ITEMS, 0);
                  BlockPos blockpos = parseBlockPos(sender, args, 1, false);
                  World world = sender.getEntityWorld();
                  TileEntity tileentity = world.getTileEntity(blockpos);
  
                  if (tileentity == null || !(tileentity instanceof IInventory)) {
                      throw new CommandException("commands.replaceitem.noContainer", Integer.valueOf(blockpos.getX()), Integer.valueOf(blockpos.getY()), Integer.valueOf(blockpos.getZ()));
                  }
  
                  IInventory iinventory = (IInventory) tileentity;
  
                  if (j >= 0 && j < iinventory.getSizeInventory()) {
                      iinventory.setInventorySlotContents(j, itemstack);
                  }
              } else {
                  Entity entity = getEntity(sender, args[1]);
                  sender.setCommandStat(CommandResultStats.Type.AFFECTED_ITEMS, 0);
  
                  if (entity instanceof EntityPlayer) {
                      ((EntityPlayer) entity).inventoryContainer.detectAndSendChanges();
                  }
  
                  if (!entity.replaceItemInInventory(j, itemstack)) {
                      throw new CommandException("commands.replaceitem.failed", Integer.valueOf(j), Integer.valueOf(k), itemstack == null ? "Air" : itemstack.getChatComponent());
                  }
  
                  if (entity instanceof EntityPlayer) {
                      ((EntityPlayer) entity).inventoryContainer.detectAndSendChanges();
                  }
              }
  
              sender.setCommandStat(CommandResultStats.Type.AFFECTED_ITEMS, k);
              notifyOperators(sender, this, "commands.replaceitem.success", Integer.valueOf(j), Integer.valueOf(k), itemstack == null ? "Air" : itemstack.getChatComponent());
          }
      }
  
      private int getSlotForShortcut(String shortcut) throws CommandException {
          if (!SHORTCUTS.containsKey(shortcut)) {
              throw new CommandException("commands.generic.parameter.invalid", shortcut);
          } else {
              return SHORTCUTS.get(shortcut).intValue();
          }
      }
  
      public List<String> addTabCompletionOptions(ICommandSender sender, String[] args, BlockPos pos) {
          return args.length == 1 ? getListOfStringsMatchingLastWord(args, "entity", "block") : (args.length == 2 && args[0].equals("entity") ? getListOfStringsMatchingLastWord(args, this.getUsernames()) : (args.length >= 2 && args.length <= 4 && args[0].equals("block") ? func_175771_a(args, 1, pos) : ((args.length != 3 || !args[0].equals("entity")) && (args.length != 5 || !args[0].equals("block")) ? ((args.length != 4 || !args[0].equals("entity")) && (args.length != 6 || !args[0].equals("block")) ? null : getListOfStringsMatchingLastWord(args, Item.itemRegistry.getKeys())) : getListOfStringsMatchingLastWord(args, SHORTCUTS.keySet()))));
      }
  
      protected String[] getUsernames() {
          return MinecraftServer.getServer().getAllUsernames();
      }
  
      public boolean isUsernameIndex(String[] args, int index) {
          return args.length > 0 && args[0].equals("entity") && index == 1;
      }
  
      static {
          for (int i = 0; i < 54; ++i) {
              SHORTCUTS.put("slot.container." + i, Integer.valueOf(i));
          }
  
          for (int j = 0; j < 9; ++j) {
              SHORTCUTS.put("slot.hotbar." + j, Integer.valueOf(j));
          }
  
          for (int k = 0; k < 27; ++k) {
              SHORTCUTS.put("slot.inventory." + k, Integer.valueOf(9 + k));
          }
  
          for (int l = 0; l < 27; ++l) {
              SHORTCUTS.put("slot.enderchest." + l, Integer.valueOf(200 + l));
          }
  
          for (int i1 = 0; i1 < 8; ++i1) {
              SHORTCUTS.put("slot.villager." + i1, Integer.valueOf(300 + i1));
          }
  
          for (int j1 = 0; j1 < 15; ++j1) {
              SHORTCUTS.put("slot.horse." + j1, Integer.valueOf(500 + j1));
          }
  
          SHORTCUTS.put("slot.weapon", Integer.valueOf(99));
          SHORTCUTS.put("slot.armor.head", Integer.valueOf(103));
          SHORTCUTS.put("slot.armor.chest", Integer.valueOf(102));
          SHORTCUTS.put("slot.armor.legs", Integer.valueOf(101));
          SHORTCUTS.put("slot.armor.feet", Integer.valueOf(100));
          SHORTCUTS.put("slot.horse.saddle", Integer.valueOf(400));
          SHORTCUTS.put("slot.horse.armor", Integer.valueOf(401));
          SHORTCUTS.put("slot.horse.chest", Integer.valueOf(499));
      }
  }
  