BlockShifter.java

package selim.randomStuff.tools;

import java.util.List;

import net.minecraft.block.Block;
import net.minecraft.block.state.IBlockState;
import net.minecraft.entity.player.EntityPlayer;
import net.minecraft.init.Blocks;
import net.minecraft.init.SoundEvents;
import net.minecraft.item.Item;
import net.minecraft.item.ItemStack;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.tileentity.TileEntityFurnace;
import net.minecraft.util.EnumActionResult;
import net.minecraft.util.EnumFacing;
import net.minecraft.util.EnumHand;
import net.minecraft.util.ResourceLocation;
import net.minecraft.util.SoundCategory;
import net.minecraft.util.math.BlockPos;
import net.minecraft.util.text.TextComponentString;
import net.minecraft.util.text.translation.I18n;
import net.minecraft.world.World;
import net.minecraftforge.fml.common.registry.ForgeRegistries;
import net.minecraftforge.fml.common.registry.GameRegistry;
import selim.randomStuff.SelimRandomStuff;

public class BlockShifter extends Item {
	
	private final String name = "blockShifter";
	
	public BlockShifter() {
		setUnlocalizedName(name);
		this.setRegistryName(name);
		setCreativeTab(SelimRandomStuff.randomThingsTab);
		setMaxStackSize(1);
	}
	
	public String getName() {
		return name;
	}
	
	public void addInformation(ItemStack itemStack, EntityPlayer player, List list, boolean bool) {
		NBTTagCompound nbt = itemStack.getTagCompound();
		if (nbt != null) {
			String blockRegistry = nbt.getString("blockRegistry");
			if (blockRegistry.equals("")) {
				list.add("Empty.");
			}
			else {
				list.add("Contains a block.");
				//list.add("Contains a §6" + blockRegistry + "§r§7.");
				//list.add("Contains a §6" + I18n.translateToLocal(Block.getBlockById(nbt.getInteger("blockID")).getUnlocalizedName()) + "§r§7.");
			}
		}
		else {
			list.add("Empty.");
		}
	}
	
	public boolean hasEffect() {
		return true;
	}
	
	@Override
	public EnumActionResult onItemUse(ItemStack itemStack, EntityPlayer player, World world,
            BlockPos pos, EnumHand hand, EnumFacing facing, float hitX, float hitY, float hitZ) {
		NBTTagCompound nbt = itemStack.getTagCompound();
        if (nbt == null) {
        	itemStack.setTagCompound(new NBTTagCompound());
        	nbt = itemStack.getTagCompound();
        }
        if (nbt.getString("blockRegistry").equals("")) {  // picking up block
            if (world.canMineBlockBody(player, pos)) {
                Block selectedBlock = world.getBlockState(pos).getBlock();
                if (!selectedBlock.equals(Blocks.BEDROCK)) {
                	IBlockState block = world.getBlockState(pos);
                	nbt.setString("blockRegistry", ForgeRegistries.BLOCKS.getKey(selectedBlock).toString());
                	nbt.setInteger("blockMeta", Block.getStateId(block));
                    TileEntity tileEntity = world.getTileEntity(pos);
                    if (tileEntity != null) {
                        NBTTagCompound entityData = new NBTTagCompound();
                        tileEntity.writeToNBT(entityData);
                        nbt.setTag("blockData", entityData);
                        world.removeTileEntity(pos);
                    }
                    itemStack.setTagCompound(nbt);
                    if (!world.isRemote) {
                    	world.setBlockToAir(pos);
                    }
                    //world.notifyNeighborsOfStateChange(pos, null);
                    //world.markAndNotifyBlock(pos, world.getChunkFromBlockCoords(pos), world.getBlockState(pos), world.getBlockState(pos), 0);
                    world.playSound(player, pos, SoundEvents.ENTITY_ENDERMEN_TELEPORT, SoundCategory.PLAYERS, 1.0F, 1.0F);
                }
            }
        }
        else {  // placing block
        	if (!world.getBlockState(pos).getBlock().isReplaceable(world, pos) || player.isSneaking()) {	
	            switch (facing) {// determine where the new block goes
				case DOWN:
					pos = pos.add(0,-1,0);
					break;
				case EAST:
					pos = pos.add(1,0,0);
					break;
				case NORTH:
					pos = pos.add(0,0,-1);
					break;
				case SOUTH:
					pos = pos.add(0,0,1);
					break;
				case UP:
					pos = pos.add(0,1,0);
					break;
				case WEST:
					pos = pos.add(-1,0,0);
					break;
				default:
					break;
	            }
        	}
            if (world.isAirBlock(pos) || world.getBlockState(pos).getBlock().isReplaceable(world, pos)) {  // if the block in the new location is air, or is replaceable, continue
            	//IBlockState newBlockState = Block.getBlockById(nbt.getInteger("blockID")).getStateById(nbt.getInteger("blockMeta"));
            	IBlockState newBlockState = ForgeRegistries.BLOCKS.getValue(new ResourceLocation(nbt.getString("blockRegistry"))).getStateById(nbt.getInteger("blockMeta"));
                world.setBlockState(pos, newBlockState, 3);
                world.playSound(player, pos, SoundEvents.ENTITY_ENDERMEN_TELEPORT, SoundCategory.PLAYERS, 1.0F, 1.0F);
                nbt.setString("blockRegistry", "");
                TileEntity tileEntity = world.getTileEntity(pos);
                if (tileEntity != null && nbt.hasKey("blockData")) {
                    NBTTagCompound entityData = nbt.getCompoundTag("blockData");
//                    entityData.setInteger("x", pos.getX());
//                    entityData.setInteger("y", pos.getY());
//                    entityData.setInteger("z", pos.getZ());
                    tileEntity.readFromNBT(entityData);
                    nbt.removeTag("blockData");
                }
                itemStack.setTagCompound(nbt);
                world.notifyNeighborsOfStateChange(pos, null);
                world.markAndNotifyBlock(pos, world.getChunkFromBlockCoords(pos), world.getBlockState(pos), world.getBlockState(pos), 0);
            }
        }
        player.swingArm(hand);
        return null;
    }
}