PlayerSkin.java

import com.mojang.authlib.GameProfile;
import com.mojang.authlib.properties.Property;
import net.minecraft.server.v1_15_R1.EntityPlayer;
import org.bukkit.Material;
import org.bukkit.craftbukkit.libs.org.apache.commons.codec.binary.Base64;
import org.bukkit.craftbukkit.v1_15_R1.entity.CraftPlayer;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.SkullMeta;

import java.lang.reflect.Field;
import java.net.URL;
import java.util.Iterator;
import java.util.UUID;

public class PlayerSkin {
	private final String texture;
	
	/**
	 * Get the player skin data.
	 *
	 * @param url the URL to get the data from
	 */
	public PlayerSkin(URL url) {
		this.texture = new String(Base64.encodeBase64(("{textures:{SKIN:{url:\"" + url.toString() + "\"}}}").getBytes()));
	}
	
	/**
	 * Get the player skin data.
	 *
	 * @param texture the texture property
	 */
	public PlayerSkin(String texture) {
		this.texture = texture;
	}
	
	/**
	 * Get the player skin data for the player.
	 *
	 * @param player the {@link Player}
	 */
	public PlayerSkin(Player player) {
		// Get the profile data
		EntityPlayer entityPlayer = ((CraftPlayer) player).getHandle();
		GameProfile profile = entityPlayer.getProfile();
		// Get the properties
		Iterator<Property> properties = profile.getProperties().get("textures").iterator();
		if(properties.hasNext()) {
			Property property = properties.next();
			this.texture = property.getValue();
		}
		else
			this.texture = null;
	}
	
	/**
	 * Get the base64 encoded json object that contains the skin data.
	 *
	 * @return the texture
	 */
	public String getTexture() {
		return this.texture;
	}
	
	/**
	 * Get the item for the skin instance.
	 *
	 * @param uuid the UUID for the game profile
	 * @return the item
	 */
	public ItemStack getItem(UUID uuid) {
		ItemStack item = new ItemStack(Material.PLAYER_HEAD);
		
		// Make sure they have a skin
		if(this.getTexture() != null) {
			// Start loading in skull metadata
			SkullMeta sm = (SkullMeta) item.getItemMeta();
			
			// Make a profile with the skin texture
			GameProfile profile = new GameProfile(uuid, null);
			byte[] encoded = this.getTexture().getBytes();
			profile.getProperties().put("textures", new Property("textures", new String(encoded)));
			
			// Update the skull metadata
			try {
				Field profileField = sm.getClass().getDeclaredField("profile");
				profileField.setAccessible(true);
				profileField.set(sm, profile);
			} catch (Exception ex) {
				ex.printStackTrace();
			}
			
			// Update the item meta
			item.setItemMeta(sm);
		}
		
		return item;
	}
	
	/**
	 * Get the item for the skin instance.
	 *
	 * @return the item
	 */
	public ItemStack getItem() {
		return this.getItem(UUID.randomUUID());
	}
}