TilePointer

package net.railsofwar.row.track.tileentity;

import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.network.NetworkManager;
import net.minecraft.network.play.server.SPacketUpdateTileEntity;
import net.minecraft.tileentity.TileEntity;
import net.minecraft.util.ITickable;
import net.railsofwar.row.track.enumeration.EnumTrackDirectionSWNE;

import javax.annotation.Nullable;

public class TilePointer extends TileEntity implements ITickable{
    public EnumTrackDirectionSWNE direction = EnumTrackDirectionSWNE.SOUTH;
    public boolean activated = false;
    public boolean prevActivated = false;
    public byte progress = 0;

    public TilePointer(){
    }

    @Override
    public void update(){
        if(this.activated){
            if(this.progress < 20){
                this.progress++;
            }else{
                this.progress = 20;
            }
        }else{
            if(this.progress > 0){
                this.progress--;
            }else{
                this.progress = 0;
            }
        }
    }

    @Override
    public NBTTagCompound writeToNBT(NBTTagCompound tag){
        tag.setByte("direction", (byte) direction.ordinal());
        tag.setBoolean("activated", activated);
        tag.setByte("progress", progress);
        return super.writeToNBT(tag);
    }

    @Override
    public void readFromNBT(NBTTagCompound tag){
        direction = EnumTrackDirectionSWNE.getFront(tag.getByte("direction"));
        this.activated = tag.getBoolean("activated");
        this.progress = tag.getByte("progress");
        super.readFromNBT(tag);
    }

    @Override
    public NBTTagCompound getUpdateTag(){
        return this.writeToNBT(new NBTTagCompound());
    }

    @Nullable
    public SPacketUpdateTileEntity getUpdatePacket(){
        return new SPacketUpdateTileEntity(this.pos, 0, this.getUpdateTag());
    }

    @Override
    public void onDataPacket(NetworkManager net, SPacketUpdateTileEntity pkt){
        readFromNBT(pkt.getNbtCompound());
        worldObj.notifyBlockUpdate(pos, worldObj.getBlockState(pos), worldObj.getBlockState(pos), 3);
    }
}