minecraft-kajetans-mod/src/main/java/me/km/networking/HumanUpdate.java

package me.km.networking;

import io.netty.buffer.ByteBuf;
import java.nio.charset.StandardCharsets;
import me.km.entities.EntityHuman;
import me.km.entities.HumanSkinLoader;
import net.minecraft.client.Minecraft;
import net.minecraft.entity.Entity;
import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
import net.minecraftforge.fml.common.network.simpleimpl.IMessageHandler;
import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;

public class HumanUpdate implements IMessage
{
    private int humanId;
    private String name;
    
    public HumanUpdate() 
    {
        humanId = -1;
        name = null;
    }
    
    public HumanUpdate(EntityHuman h) 
    {
        humanId = h.getEntityId();
        name = h.getSkinName();
    }
    
    @Override
    public void fromBytes(ByteBuf buf) 
    {
        humanId = buf.readInt();
        int length = buf.readInt();
        name = buf.readBytes(length).toString(StandardCharsets.UTF_8);
    }

    @Override
    public void toBytes(ByteBuf buf) 
    {
        buf.writeInt(humanId);
        byte[] b = name.getBytes(StandardCharsets.UTF_8);
        buf.writeInt(b.length);
        buf.writeBytes(b);
    }

    public static class Handler implements IMessageHandler<HumanUpdate, IMessage>
    {
        @Override
        public IMessage onMessage(HumanUpdate message, MessageContext ctx) 
        {
            Entity ent = Minecraft.getMinecraft().world.getEntityByID(message.humanId);
            if(ent == null || ent.getClass() != EntityHuman.class)
            {
                return null;
            }
            EntityHuman h = (EntityHuman) ent;
            h.setSkinName(message.name);
            h.setTexture(HumanSkinLoader.INSTANCE.getTexture(message.name, loc -> h.setTexture(loc)));
            return null;
        }
    }
}