Core/src/main/java/eu/univento/core/api/player/NickName.java

package eu.univento.core.api.player;

import com.mojang.authlib.GameProfile;
import com.mojang.authlib.properties.Property;
import eu.univento.core.Core;
import eu.univento.core.api.database.MySQL;
import net.minecraft.server.v1_9_R1.Packet;
import net.minecraft.server.v1_9_R1.PacketPlayOutEntityDestroy;
import net.minecraft.server.v1_9_R1.PacketPlayOutNamedEntitySpawn;
import net.minecraft.server.v1_9_R1.PacketPlayOutPlayerInfo;
import org.bukkit.Bukkit;
import org.bukkit.craftbukkit.v1_9_R1.entity.CraftPlayer;
import org.bukkit.entity.Player;
import org.bukkit.scheduler.BukkitRunnable;

import java.lang.reflect.Field;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Random;

/**
 * gets nick settings for players
 * @author joethei
 * @version 1.1
 */
public class NickName {

	private static HashMap<CustomPlayer, String> nicks = new HashMap<>();

    private static Field nameField = getField(GameProfile.class, "name");
	/**
	 * 
	 * @param p remove nickname from player
	 */
	public static void remove(CustomPlayer p) {
		if (nicks.containsKey(p))
			nicks.remove(p);
	}

	/**
	 * sets nick boolean
	 * @param p player
	 * @param nick boolean
	 * @throws ClassNotFoundException Class couldn't be found
	 * @throws SQLException SQL server not available or throwing error
	 */
	static void setNick(CustomPlayer p, boolean nick) throws SQLException, ClassNotFoundException {
		MySQL sql = Core.returnSQL();
		sql.openConnection();
		if (nick)
			sql.getConnection().createStatement().executeUpdate("UPDATE PlayerSettings SET nick = '1' WHERE ID = '" + p.getID() + "';");
		else
			sql.getConnection().createStatement().executeUpdate("UPDATE PlayerSettings SET nick = '0' WHERE ID = '" + p.getID() + "';");
			sql.closeConnection();
	}

	/**
	 * gets if player is nicked
	 * @param p player
	 * @return true / false
	 * @throws ClassNotFoundException Class couldn't be found
	 * @throws SQLException SQL server not available or throwing error
	 */
	static boolean isNicked(CustomPlayer p) throws SQLException, ClassNotFoundException {
		MySQL sql = Core.returnSQL();
		sql.openConnection();
		ResultSet rs = sql.getConnection().createStatement().executeQuery("SELECT nick FROM PlayerSettings WHERE ID = '" + p.getID() + "';");
		if (rs.next()) {
            boolean is = rs.getInt("nick") == 1;
			sql.closeConnection();
            return is;
		}
		sql.closeConnection();
		return false;
	}

	/**
	 * gets nickname of player
	 * @param p player
	 * @return String
	 */
	static String getNick(CustomPlayer p) {
		if (nicks.containsKey(p)) {
			return nicks.get(p);
		}else if(p.isNicked()){
            nicks.put(p, getRandomNick());
            return nicks.get(p);
        }
		return null;
	}

	/**
	 * gets random Nickname
	 * @return String
	 */
	private static String getRandomNick() {
		ArrayList<String> names = new ArrayList<>();
		names.add("GommeHD");
		names.add("Notch");
		names.add("12ms");
		names.add("Coriux");
        names.add("Kekse");
        names.add("AFK");
        names.add("13ms");
        names.add("Inhaltsangabe");
        names.add("LassMichEinfach");
        names.add("Inventar");
        names.add("DDoS");
        names.add("Upps");
        names.add("Hater");
        names.add("ServerOwner");
        names.add("HastDuMinecraft");
        names.add("Telekom");
        names.add("TeamBlauNurGute");
        names.add("Stats");
        names.add("Herbst");
        names.add("IchHabTwitter");
        names.add("Versager");
        names.add("ImmerAmSterben");
        names.add("Lagmolia");
        names.add("Bowspammer");
        names.add("Behindert");
        names.add("DasProgramm");
        names.add("DasPlugin");
        names.add("Staubsauger");
        names.add("Buchstabe");
        names.add("gekickt");
        names.add("Einfachpermaban");
        names.add("KeinNameWarFrei");
        names.add("KlopapierIstLeer");
        names.add("Packungsbeilage");
        names.add("HabKeinRewiPremium");
        names.add("PermaBanAufGomme");
        names.add("Vorteil");
        names.add("Nachteil");
        names.add("Oberteil");
        names.add("Einstellung");
        names.add("Verbindung");
        names.add("WarAFKWasWar");

		Random r = new Random();
		int i = r.nextInt(names.size());

		return names.get(i);
	}

    static void changeSkin(CustomPlayer p, String name) {
        Skin skin = new Skin(Bukkit.getOfflinePlayer(name).getUniqueId().toString().replace("_", ""));
        if(skin.getName() != null) {
            GameProfile profile = p.getProfile();
            profile.getProperties().clear();
            profile.getProperties().put(skin.getName(), new Property(skin.getName(), skin.getValue(), skin.getSignature()));
            Bukkit.getScheduler().runTaskLater(Core.getInstance(), () -> {
                for(Player players : Bukkit.getOnlinePlayers()) {
                    players.hidePlayer(p);
                }
            }, 1L);
            Bukkit.getScheduler().runTaskLater(Core.getInstance(), () -> {
                for(Player players : Bukkit.getOnlinePlayers()) {
                    players.showPlayer(p);
                }
             }, 1L);
        }
    }

    static void setName(CustomPlayer p, String name) {
        p.setDisplayName(name);
        try {
            nameField.set(p.getProfile(), name);
            PacketPlayOutEntityDestroy destroy = new PacketPlayOutEntityDestroy(p.getEntityId());
            sendPacket(destroy);
            removeFromTablist(p);

            new BukkitRunnable() {

                @Override
                public void run() {
                    addToTablist(p);
                    PacketPlayOutNamedEntitySpawn spawn = new PacketPlayOutNamedEntitySpawn(p.getHandle());
                    Bukkit.getOnlinePlayers().stream().filter(players -> !players.equals(p)).forEach(players -> {
                        ((CraftPlayer) players).getHandle().playerConnection.sendPacket(spawn);
                    });
                }

            }.runTaskLater(Core.getInstance(), 4);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        }
    }

    private static void addToTablist(CraftPlayer p) {
        PacketPlayOutPlayerInfo packet = new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.ADD_PLAYER, p.getHandle());
        sendPacket(packet);
    }

    private static void removeFromTablist(CraftPlayer cp) {
        PacketPlayOutPlayerInfo packet = new PacketPlayOutPlayerInfo(PacketPlayOutPlayerInfo.EnumPlayerInfoAction.REMOVE_PLAYER, cp.getHandle());
        sendPacket(packet);
    }

    private static void sendPacket(Packet<?> packet) {
        for(Player players : Bukkit.getOnlinePlayers()) {
            ((CraftPlayer)players).getHandle().playerConnection.sendPacket(packet);
        }
    }

    private static Field getField(Class<?> clazz, String name) {
        try{
            Field field = clazz.getDeclaredField(name);
            field.setAccessible(true);
            return field;
        }catch (NoSuchFieldException | SecurityException e) {
            e.printStackTrace();
            return null;
        }
    }
}