CustomNPC-Plus/src/main/java/noppes/npcs/Server.java

package noppes.npcs;

import io.netty.buffer.ByteBuf;
import kamkeel.npcs.util.ByteBufUtils;
import net.minecraft.nbt.NBTTagCompound;
import net.minecraft.network.PacketBuffer;
import net.minecraft.village.MerchantRecipeList;

import java.io.IOException;
import java.util.Arrays;
import java.util.List;
import java.util.Map;

public class Server {
	public static boolean fillBuffer(ByteBuf buffer, Enum enu, Object... obs) throws IOException{
		buffer.writeInt(enu.ordinal());
		for(Object ob : obs){
			if(ob == null)
				continue;
			if(ob instanceof Map){
				Map<String,Integer> map = (Map<String, Integer>) ob;

				buffer.writeInt(map.size());
				for(String key : map.keySet()){
					int value = map.get(key);
					buffer.writeInt(value);
					ByteBufUtils.writeString(buffer, key);
				}
			}
			else if(ob instanceof MerchantRecipeList)
				((MerchantRecipeList)ob).func_151391_a(new PacketBuffer(buffer));
			else if(ob instanceof List){
				List<String> list = (List<String>) ob;
				buffer.writeInt(list.size());
				for(String s : list)
					ByteBufUtils.writeString(buffer, s);
			}
			else if(ob instanceof Enum)
				buffer.writeInt(((Enum<?>) ob).ordinal());
			else if(ob instanceof Integer)
				buffer.writeInt((Integer) ob);
			else if(ob instanceof Boolean)
				buffer.writeBoolean((Boolean) ob);
			else if(ob instanceof String)
				ByteBufUtils.writeString(buffer, (String) ob);
			else if(ob instanceof Float)
				buffer.writeFloat((Float) ob);
			else if(ob instanceof Long)
				buffer.writeLong((Long) ob);
			else if(ob instanceof Double)
				buffer.writeDouble((Double) ob);
            else if (ob instanceof byte[]) {
                // Write byte array length followed by bytes
                byte[] byteArray = (byte[]) ob;
                buffer.writeShort((short) byteArray.length);
                buffer.writeBytes(byteArray);
            }
			else if(ob instanceof NBTTagCompound)
				ByteBufUtils.writeNBT(buffer, (NBTTagCompound) ob);
		}
		if(buffer.array().length >= 32767){
			LogWriter.error("Packet " + enu + " was too big to be send");
            LogWriter.script( "Issue occurred with the following Packet - " + enu + ":\n" + Arrays.toString(obs));
            return false;
		}
        return true;
	}
}