Util.java

/*
 * ArmorStandEditor: Bukkit plugin to allow editing armor stand attributes
 * Copyright (C) 2016  RypoFalem
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */

package io.github.rypofalem.armorstandeditor;

import org.bukkit.ChatColor;

public abstract class Util {
	
	public static final double FULLCIRCLE = Math.PI*2;

	//inserts a formatting character between every character, making it invisible when displayed as lore
	public static String encodeHiddenLore(String lore){
		for(int i = 0; i < lore.length(); i+=2){
			lore = lore.substring(0, i) + ChatColor.COLOR_CHAR + lore.substring(i, lore.length());
		}
		return lore;
	}
	
	//removes the formatting characters
	public static String decodeHiddenLore(String lore){
		while(lore.contains(ChatColor.COLOR_CHAR + "")){
			lore =lore.substring(0, lore.indexOf(ChatColor.COLOR_CHAR)) + lore.substring(lore.indexOf(ChatColor.COLOR_CHAR)+1, lore.length());
		}
		return lore;
	}
	
	public static <T extends Enum<?>> String getEnumList(Class<T> enumType){
		return getEnumList(enumType, " | ");
	}

	public static <T extends Enum<?>> String getEnumList(Class<T> enumType, String delimiter){
		String list = "";
		boolean put =false;
		for(Enum<?> e : enumType.getEnumConstants()){
			list = list + e.toString() + delimiter;
			put = true;
		}
		if(put) list = list.substring(0, list.length() - delimiter.length());
		return list;
	}
	
	public static double addAngle(double current, double angleChange) {
		current += angleChange;
		current = fixAngle(current, angleChange);
		return current;
	}

	public static double subAngle(double current, double angleChange){
		current -= angleChange;
		current = fixAngle(current, angleChange);
		return current;
	}

	//clamps angle to 0 if it exceeds 2PI rad (360 degrees), is closer to 0 than angleChange value, or is closer to 2PI rad than 2PI rad - angleChange value.
	private static double fixAngle(double angle, double angleChange){
		if(angle > FULLCIRCLE){
			return 0;
		}
		if(angle > 0 && angle < angleChange){
			if(angle < angleChange/2){
				return 0;
			}
		}
		if(angle > FULLCIRCLE-angle){
			if(angle > FULLCIRCLE - (angleChange/2)){
				return 0;
			}
		}
		return angle;
	}
}