extras/src/main/java/pw/kaboom/extras/helpers/SkinDownloader.java

package pw.kaboom.extras.helpers;

import java.io.IOException;
import java.io.InputStreamReader;
import java.net.URL;
import java.util.HashMap;
import java.util.UUID;

import javax.net.ssl.HttpsURLConnection;

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;

import pw.kaboom.extras.Main;

public final class SkinDownloader {
    private static HashMap<UUID, PlayerProfile> skinProfiles = new HashMap<UUID, PlayerProfile>();

    private HttpsURLConnection skinConnection;
    private InputStreamReader skinStream;

    private String texture;
    private String signature;

    public void applySkin(final Player player, final String name, final boolean shouldSendMessage) {
        new BukkitRunnable() {
            @Override
            public void run() {
                final PlayerProfile profile = player.getPlayerProfile();

                try {
                    fetchSkinData(name);
                    profile.setProperty(new ProfileProperty("textures", texture, signature));

                    if (shouldSendMessage) {
                        player.sendMessage("Successfully set your skin to " + name + "'s");
                    }
                } catch (Exception exception) {
                    try {
                        skinStream.close();
                        skinConnection.disconnect();
                    } catch (Exception ignored) {
                    }

                    if (shouldSendMessage) {
                        player.sendMessage("A player with that username doesn't exist");
                    }

                    return;
                }

                new BukkitRunnable() {
                    @Override
                    public void run() {
                        try {
                            player.setPlayerProfile(profile);
                        } catch (Exception ignored) {
                        }
                    }
                }.runTask(JavaPlugin.getPlugin(Main.class));
            }
        }.runTaskAsynchronously(JavaPlugin.getPlugin(Main.class));
    }

    public void fillJoinProfile(final PlayerProfile profile, final String name, final UUID uuid) {
        try {
            fetchSkinData(name);
            profile.setProperty(new ProfileProperty("textures", texture, signature));
            skinProfiles.put(uuid, profile);
        } catch (Exception exception) {
            try {
                skinStream.close();
                skinConnection.disconnect();
            } catch (Exception ignored) {
            }
        }
    }

    private void fetchSkinData(final String playerName) throws IOException {
        final URL skinUrl = new URL("https://api.ashcon.app/mojang/v2/user/" + playerName);
        skinConnection = (HttpsURLConnection) skinUrl.openConnection();
        skinConnection.setConnectTimeout(0);

        skinStream = new InputStreamReader(skinConnection.getInputStream());
        final JsonObject responseJson = new JsonParser().parse(skinStream).getAsJsonObject();
        final JsonObject rawSkin = responseJson.getAsJsonObject("textures").getAsJsonObject("raw");
        texture = rawSkin.get("value").getAsString();
        signature = rawSkin.get("signature").getAsString();

        skinStream.close();
        skinConnection.disconnect();
    }

    public static PlayerProfile getProfile(final UUID uuid) {
        return skinProfiles.get(uuid);
    }

    public static void removeProfile(final UUID uuid) {
        skinProfiles.remove(uuid);
    }
}