extras/src/main/java/pw/kaboom/extras/commands/CommandSkin.java

package pw.kaboom.extras;

import java.io.InputStreamReader;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.net.http.HttpResponse.BodyHandlers;
import java.net.URI;

import org.bukkit.ChatColor;

import org.bukkit.command.Command;
import org.bukkit.command.CommandExecutor;
import org.bukkit.command.CommandSender;
import org.bukkit.command.ConsoleCommandSender;

import org.bukkit.entity.Player;

import org.bukkit.plugin.java.JavaPlugin;

import org.bukkit.scheduler.BukkitRunnable;

import com.destroystokyo.paper.profile.PlayerProfile;
import com.destroystokyo.paper.profile.ProfileProperty;

import com.google.gson.JsonObject;
import com.google.gson.JsonParser;

class CommandSkin implements CommandExecutor {
	public boolean onCommand(CommandSender sender, Command command, String label, final String[] args) {
		if (sender instanceof ConsoleCommandSender) {
			sender.sendMessage("Command has to be run by a player");
		} else {
			final Player player = (Player) sender;
	
			if (args.length == 0) {
				player.sendMessage(ChatColor.RED + "Usage: /" + label + " <username>");
			} else if (!Main.skinInProgress.contains(player.getUniqueId())) {
				Main.skinInProgress.add(player.getUniqueId());

				HttpClient client = HttpClient.newHttpClient();
				HttpRequest request = HttpRequest.newBuilder()
					.uri(URI.create("https://api.ashcon.app/mojang/v2/user/" + args[0]))
					.build();
				client.sendAsync(request, BodyHandlers.ofInputStream())
					.thenAccept(response -> {
					if (response.statusCode() == 200) {
						final InputStreamReader skinStream = new InputStreamReader(response.body());
						final JsonObject responseJson = new JsonParser().parse(skinStream).getAsJsonObject();
						final JsonObject rawSkin = responseJson.getAsJsonObject("textures").getAsJsonObject("raw");
						final String texture = rawSkin.get("value").getAsString();
						final String signature = rawSkin.get("signature").getAsString();
						try {
							skinStream.close();
						} catch (Exception exception) {
							System.out.println(exception);
						}

						final PlayerProfile profile = player.getPlayerProfile();
						profile.setProperty(new ProfileProperty("textures", texture, signature));
		
						player.sendMessage("Successfully set your skin to " + args[0] + "'s");
	
						new BukkitRunnable() {
							public void run() {
								player.setPlayerProfile(profile);
								Main.skinInProgress.remove(player.getUniqueId());
							}
						}.runTask(JavaPlugin.getPlugin(Main.class));
					} else {
						player.sendMessage("A player with that username doesn't exist");
						Main.skinInProgress.remove(player.getUniqueId());
					}
				});
			} else {
				player.sendMessage("You are already applying a skin. Please wait a few seconds.");
			}
		}
		return true;
	}
}