TitleManager

public class TitleManager {

	private static Class<?> title = getNMSClass("PacketPlayOutTitle");
	private static Class<?> enumtitleaction = getNMSClass("PacketPlayOutTitle$EnumTitleAction");
	private static Class<?> chatserial = getNMSClass("IChatBaseComponent$ChatSerializer");

	public void sendActionBar(Player p, String text) {
	    try {
	       sendPacket(p, "PacketPlayOutChat", new Class[] { getNMSClass("IChatBaseComponent"), byte.class }, chatserial.getMethod("a", String.class).invoke(null, "{\"text\": \"" + text + "\"}"), (byte)2);
	    } catch (Exception e) {
	       e.printStackTrace();
	    }
	}

	public void sendHeaderAndFooter(Player p, String header, String footer) {
	    try {
	       Object packet = getNMSClass("PacketPlayOutPlayerListHeaderFooter").newInstance();
	       getField(packet.getClass().getDeclaredField("a")).set(packet, chatserial.getMethod("a", String.class).invoke(null, "{'text': '" + header + "'}"));
	       getField(packet.getClass().getDeclaredField("b")).set(packet, chatserial.getMethod("a", String.class).invoke(null, "{'text': '" + footer + "'}"));
	       sendPacket(p, packet);
	    } catch (Exception e) {
	       e.printStackTrace();
	    }
	}

	public void sendTitles(Player p, String title, String subtitle, int fadeIn, int stay, int fadeOut) {
	    sendTimings(p, fadeIn, stay, fadeOut);
	    sendTitle(p, title);
	    sendSubTitle(p, subtitle);
	}

	public void sendTitle(Player p, String title, int fadeIn, int stay, int fadeOut) {
	    sendTimings(p, fadeIn, stay, fadeOut);
	    sendTitle(p, title);
	}

	public void sendTitle(Player p, String title) {
		try {
	        Object t = TitleManager.title.newInstance();
	        Field f = t.getClass().getDeclaredField("a");
	        f.setAccessible(true);
	        f.set(t, getField(enumtitleaction.getDeclaredField("TITLE")).get(null));
	        f = t.getClass().getDeclaredField("b");
	        f.setAccessible(true);
	        f.set(t, chatserial.getMethod("a", String.class).invoke(null, "{'text': '" + title + "'}"));
	        sendPacket(p, t);
	     } catch (Exception e) {
	        e.printStackTrace();
	     }
	}
	public void sendSubTitle(Player p, String subtitle, int fadeIn, int stay, int fadeOut) {
	    sendTimings(p, fadeIn, stay, fadeOut);
	    sendSubTitle(p, subtitle);
	}

	public void sendSubTitle(Player p, String subtitle) {
	    try {
	        Object t = title.newInstance();
	        Field f = t.getClass().getDeclaredField("a");
	        f.setAccessible(true);
	        f.set(t, getField(enumtitleaction.getDeclaredField("SUBTITLE")).get(null));
	        f = t.getClass().getDeclaredField("b");
	        f.setAccessible(true);
	        f.set(t, chatserial.getMethod("a", String.class).invoke(null, "{'text': '" + subtitle + "'}"));
	        sendPacket(p, t);
	     } catch (Exception e) {
	        e.printStackTrace();
	     }
	}

	public void sendTimings(Player p, int fadeIn, int stay, int fadeOut) {
	    try {
	        Object t = title.newInstance();
	        Field f = t.getClass().getDeclaredField("a");
	        f.setAccessible(true);
	        f.set(t, getField(enumtitleaction.getDeclaredField("TIMES")).get(null));
	        f = t.getClass().getDeclaredField("c");
	        f.setAccessible(true);
	        f.set(t, fadeIn);
	        f = t.getClass().getDeclaredField("d");
	        f.setAccessible(true);
	        f.set(t, stay);
	        f = t.getClass().getDeclaredField("e");
	        f.setAccessible(true);
	        f.set(t, fadeOut);
	        sendPacket(p, t);
	     } catch (Exception e) {
	        e.printStackTrace();
	     }
	}

	public void reset(Player p) {
	    try {
	        Object t = title.newInstance();
	        Field f = t.getClass().getDeclaredField("a");
	        f.setAccessible(true);
	        f.set(t, getField(enumtitleaction.getDeclaredField("RESET")).get(null));
	        sendPacket(p, t);
	     } catch (Exception e) {
	        e.printStackTrace();
	     }
	}

	public void clear(Player p) {
		try {
			Object t = title.newInstance();
			Field f = t.getClass().getDeclaredField("a");
	        f.setAccessible(true);
	        f.set(t, getField(enumtitleaction.getDeclaredField("CLEAR")).get(null));
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private void sendPacket(Player p, Object packet) {
		try {
			Object nmsPlayer = getNMSPlayer(p);
	        Object connection = nmsPlayer.getClass().getField("playerConnection").get(nmsPlayer);
	        connection.getClass().getMethod("sendPacket", getNMSClass("Packet")).invoke(connection, packet);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private void sendPacket(Player p, String packetName, Class<?>[] parameterclass, Object... parameters) {
		try {
			Object nmsPlayer = getNMSPlayer(p);
	        Object connection = nmsPlayer.getClass().getField("playerConnection").get(nmsPlayer);
	        Object packet = Class.forName(nmsPlayer.getClass().getPackage().getName() + "." + packetName).getConstructor(parameterclass).newInstance(parameters);
	        connection.getClass().getMethod("sendPacket", getNMSClass("Packet")).invoke(connection, packet);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	private static String getVersion() {
		String name = Bukkit.getServer().getClass().getPackage().getName();
		String version = name.substring(name.lastIndexOf('.') + 1) + ".";
		return version;
	}
	private static Class<?> getNMSClass(String className) {
		String fullName = "net.minecraft.server." + getVersion() + className;
	    Class<?> clazz = null;
	    try {
	    	clazz = Class.forName(fullName);
	    } catch (Exception e) {
	    	e.printStackTrace();
	    }
	    return clazz;
	}

	public static Object getNMSPlayer(Player p) {
		try {
			return p.getClass().getMethod("getHandle").invoke(p);
		} catch (Exception e) {
			e.printStackTrace();
		}
		return null;
	}

	private static Field getField(Field f) {
		f.setAccessible(true);
		return f;
	}
}