EpicHeads/main/java/com/songoda/epicheads/cache/CacheHead.java

package com.songoda.epicheads.cache;

import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import com.songoda.epicheads.EpicHeads;
import com.songoda.epicheads.config.lang.Placeholder;
import com.songoda.epicheads.util.Checks;
import com.songoda.epicheads.util.IOUtils;
import com.songoda.epicheads.volatilecode.ItemNBT;
import org.bukkit.entity.Player;
import org.bukkit.inventory.ItemStack;

import javax.annotation.Nonnull;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.nio.charset.StandardCharsets;
import java.util.*;

public final class CacheHead implements Comparable<CacheHead> {

	private int id;
	private String name;
	private final String category;
	private final String texture;
	private String textureURL;
	private UUID uniqueId;
	private final List<String> tags = new ArrayList<>();
	private double cost;

	public CacheHead(String name, String category, String texture) {
		this(-1, name, category, texture, Collections.emptyList(), -1d);
	}

	public CacheHead(String name, String category, String texture, String... tags) {
		this(-1, name, category, texture, Arrays.asList(tags), -1d);
	}

	public CacheHead(int id, String name, String category, String texture, List<String> tags, double cost) {
		Checks.ensureNonNull(name, "name");
		Checks.ensureNonNull(category, "category");
		Checks.ensureNonNull(texture, "texture");
		Checks.ensureNonNull(tags, "tags");

		this.id = id;
		this.name = name;
		this.category = category;
		this.texture = texture;
		this.textureURL = null;
		this.uniqueId = null;
		this.tags.addAll(tags);
		this.cost = cost;
	}

	public CacheHead copyWithCategory(String category) {
		return new CacheHead(id, name, category, texture, tags, cost);
	}

	public int getId() {
		return id;
	}

	public String getName() {
		return name;
	}

	public String getCategory() {
		return category;
	}

	public String getPermission() {
		return EpicHeads.getInstance().getCategoryPermission(category);
	}

	public String getTexture() {
		return texture;
	}

	public String getTextureURL() {
		if (textureURL == null) {
			textureURL = extractTextureURL(texture);
		}

		return textureURL;
	}

	public List<String> getTags() {
		return tags;
	}

	public boolean hasCost() {
		return cost >= 0;
	}

	public double getCost() {
		return (hasCost() ? cost : EpicHeads.getInstance().getMainConfig().getCategoryCost(category));
	}

	public double getRawCost() {
		return cost;
	}

	public UUID getUniqueId() {
		if (uniqueId == null) {
			uniqueId = UUID.nameUUIDFromBytes(getTextureURL().getBytes(StandardCharsets.UTF_8));
		}

		return uniqueId;
	}

	public Placeholder[] getPlaceholders(Player player) {
		return new Placeholder[] { new Placeholder("%name%", name), new Placeholder("%cost%", getCost()), new Placeholder("%category%", category), new Placeholder("%id%", Integer.toString(id)) };
	}

	public ItemStack getItemStack() {
		return ItemNBT.createHead(this);
	}

	public ItemStack getItemStack(String name) {
		return ItemNBT.createHead(this);
	}

	public ItemStack addTexture(ItemStack itemStack) {
		return ItemNBT.applyHead(this, itemStack);
	}

	protected void setId(int id) {
		this.id = id;
	}

	public void setName(String name) {
		Checks.ensureNonNull(name, "name");

		this.name = name;
	}

	public void setTags(List<String> tags) {
		Checks.ensureNonNull(tags, "tags");

		this.tags.clear();
		this.tags.addAll(tags);
	}

	public void setCost(double cost) {
		this.cost = cost;
	}

	public void write(ObjectOutputStream stream) throws IOException {
		stream.writeInt(id);
		stream.writeUTF(name);
		stream.writeUTF(category);
		stream.writeUTF(texture);
		IOUtils.writeStringList(stream, tags);
		stream.writeDouble(cost);
	}

	public static CacheHead read(ObjectInputStream stream) throws IOException {
		int id = stream.readInt();
		String name = stream.readUTF();
		String category = stream.readUTF();
		String texture = stream.readUTF();
		List<String> tags = IOUtils.readStringList(stream);
		double cost = stream.readDouble();

		return new CacheHead(id, name, category, texture, tags, cost);
	}

	@Override
	public int compareTo(@Nonnull CacheHead otherHead) {
		String otherName = otherHead.getName();

		if (name.length() > 1 && otherName.length() <= 1)
			return 1;

		if (name.length() <= 1 && otherName.length() > 1)
			return -1;

		if (name.length() == 1 && otherName.length() == 1) {
			List<String> otherTags = otherHead.getTags();

			int length = Math.min(tags.size(), otherTags.size());

			for (int index = 0; index < length; ++index) {
				int compare = tags.get(index).compareTo(otherTags.get(index));

				if (compare != 0)
					return compare;
			}

			if (tags.size() > 0 && otherTags.size() == 0)
				return -1;

			if (tags.size() == 0 && otherTags.size() > 0)
				return 1;
		}

		return name.compareTo(otherName);
	}

	public static String extractTextureURL(String texture) {
		try {
			String decoded = new String(Base64.getDecoder().decode(texture));
			JsonObject json = new JsonParser().parse(decoded).getAsJsonObject();
			JsonObject textures = json.getAsJsonObject("textures");
			JsonObject skin = textures.getAsJsonObject("SKIN");
			return skin.get("url").getAsString();
		} catch (Exception e) {
			throw new RuntimeException("Unable to get the texture URL of texture " + texture, e);
		}
	}

	public static String hello = "%%__USER__%%";

}