content: package net.minecraft.command.server;
  
  import net.minecraft.block.Block;
  import net.minecraft.block.state.IBlockState;
  import net.minecraft.command.*;
  import net.minecraft.init.Blocks;
  import net.minecraft.inventory.IInventory;
  import net.minecraft.nbt.JsonToNBT;
  import net.minecraft.nbt.NBTException;
  import net.minecraft.nbt.NBTTagCompound;
  import net.minecraft.tileentity.TileEntity;
  import net.minecraft.util.BlockPos;
  import net.minecraft.world.World;
  
  import java.util.List;
  
  public class CommandSetBlock extends CommandBase {
      public String getCommandName() {
          return "setblock";
      }
  
      public int getRequiredPermissionLevel() {
          return 2;
      }
  
      public String getCommandUsage(ICommandSender sender) {
          return "commands.setblock.usage";
      }
  
      public void processCommand(ICommandSender sender, String[] args) throws CommandException {
          if (args.length < 4) {
              throw new WrongUsageException("commands.setblock.usage");
          } else {
              sender.setCommandStat(CommandResultStats.Type.AFFECTED_BLOCKS, 0);
              BlockPos blockpos = parseBlockPos(sender, args, 0, false);
              Block block = CommandBase.getBlockByText(sender, args[3]);
              int i = 0;
  
              if (args.length >= 5) {
                  i = parseInt(args[4], 0, 15);
              }
  
              World world = sender.getEntityWorld();
  
              if (!world.isBlockLoaded(blockpos)) {
                  throw new CommandException("commands.setblock.outOfWorld");
              } else {
                  NBTTagCompound nbttagcompound = new NBTTagCompound();
                  boolean flag = false;
  
                  if (args.length >= 7 && block.hasTileEntity()) {
                      String s = getChatComponentFromNthArg(sender, args, 6).getUnformattedText();
  
                      try {
                          nbttagcompound = JsonToNBT.getTagFromJson(s);
                          flag = true;
                      } catch (NBTException nbtexception) {
                          throw new CommandException("commands.setblock.tagError", nbtexception.getMessage());
                      }
                  }
  
                  if (args.length >= 6) {
                      if (args[5].equals("destroy")) {
                          world.destroyBlock(blockpos, true);
  
                          if (block == Blocks.air) {
                              notifyOperators(sender, this, "commands.setblock.success");
                              return;
                          }
                      } else if (args[5].equals("keep") && !world.isAirBlock(blockpos)) {
                          throw new CommandException("commands.setblock.noChange");
                      }
                  }
  
                  TileEntity tileentity1 = world.getTileEntity(blockpos);
  
                  if (tileentity1 != null) {
                      if (tileentity1 instanceof IInventory) {
                          ((IInventory) tileentity1).clear();
                      }
  
                      world.setBlockState(blockpos, Blocks.air.getDefaultState(), block == Blocks.air ? 2 : 4);
                  }
  
                  IBlockState iblockstate = block.getStateFromMeta(i);
  
                  if (!world.setBlockState(blockpos, iblockstate, 2)) {
                      throw new CommandException("commands.setblock.noChange");
                  } else {
                      if (flag) {
                          TileEntity tileentity = world.getTileEntity(blockpos);
  
                          if (tileentity != null) {
                              nbttagcompound.setInteger("x", blockpos.getX());
                              nbttagcompound.setInteger("y", blockpos.getY());
                              nbttagcompound.setInteger("z", blockpos.getZ());
                              tileentity.readFromNBT(nbttagcompound);
                          }
                      }
  
                      world.notifyNeighborsRespectDebug(blockpos, iblockstate.getBlock());
                      sender.setCommandStat(CommandResultStats.Type.AFFECTED_BLOCKS, 1);
                      notifyOperators(sender, this, "commands.setblock.success");
                  }
              }
          }
      }
  
      public List<String> addTabCompletionOptions(ICommandSender sender, String[] args, BlockPos pos) {
          return args.length > 0 && args.length <= 3 ? func_175771_a(args, 0, pos) : (args.length == 4 ? getListOfStringsMatchingLastWord(args, Block.blockRegistry.getKeys()) : (args.length == 6 ? getListOfStringsMatchingLastWord(args, "replace", "destroy", "keep") : null));
      }
  }
  