rogue-savage-rats/src/mightypork/utils/string/StringUtils.java

package mightypork.utils.string;

/**
 * General purpose string utilities
 * 
 * @author MightyPork
 */
public class StringUtils {
	
	/**
	 * Get if string is in array
	 * 
	 * @param needle checked string
	 * @param case_sensitive case sensitive comparision
	 * @param haystack array of possible values
	 * @return is in array
	 */
	public static boolean isInArray(String needle, boolean case_sensitive, String... haystack)
	{
		if (case_sensitive) {
			for (String s : haystack) {
				if (needle.equals(s)) return true;
			}
			return false;
		} else {
			for (String s : haystack) {
				if (needle.equalsIgnoreCase(s)) return true;
			}
			return false;
		}
	}
	
	
	public static String fromLastDot(String s)
	{
		return fromLastChar(s, '.');
	}
	
	
	public static String toLastDot(String s)
	{
		return toLastChar(s, '.');
	}
	
	
	public static String fromLastChar(String s, char c)
	{
		if (s == null) return null;
		return s.substring(s.lastIndexOf(c) + 1, s.length());
	}
	
	
	public static String toLastChar(String s, char c)
	{
		if (s == null) return null;
		return s.substring(0, s.lastIndexOf(c));
	}
	
	
	/**
	 * Repeat a string
	 * 
	 * @param repeated string
	 * @param count
	 * @return output
	 */
	public static String repeat(String repeated, int count)
	{
		String s = "";
		for (int i = 0; i < count; i++)
			s += repeated;
		return s;
	}
	
	
	/**
	 * convert string to a same-length sequence of # marks
	 * 
	 * @param password password
	 * @return encoded
	 */
	public static String passwordify(String password)
	{
		return passwordify(password, "*");
	}
	
	
	/**
	 * convert string to a same-length sequence of chars
	 * 
	 * @param password password
	 * @param replacing character used in output
	 * @return encoded
	 */
	public static String passwordify(String password, String replacing)
	{
		return repeat(replacing, password.length());
	}
	
	
	/**
	 * Get ordinal version of numbers (1 = 1st, 5 = 5th etc.)
	 * 
	 * @param number number
	 * @return ordinal, string
	 */
	public static String numberToOrdinal(int number)
	{
		if (number % 100 < 4 || number % 100 > 13) {
			if (number % 10 == 1) return number + "st";
			if (number % 10 == 2) return number + "nd";
			if (number % 10 == 3) return number + "rd";
		}
		return number + "th";
	}
	
	
	/**
	 * Format number with thousands separated by a dot.
	 * 
	 * @param number number
	 * @return string 12.004.225
	 */
	public static String formatInt(long number)
	{
		String num = number + "";
		String out = "";
		String dot = ".";
		int cnt = 1;
		for (int i = num.length() - 1; i >= 0; i--) {
			out = num.charAt(i) + out;
			if (cnt % 3 == 0 && i > 0) out = dot + out;
			cnt++;
		}
		
		return out;
	}
	
	
	public static boolean isValidFilenameChar(char ch)
	{
		return isValidFilenameString(Character.toString(ch));
	}
	
	
	public static boolean isValidFilenameString(String filename)
	{
		return filename.matches("[a-zA-Z0-9 +\\-.,_%@#!]+");
	}
	
	
	public static boolean isValidIdentifierChar(char ch)
	{
		return isValidIdentifierString(Character.toString(ch));
	}
	
	
	public static boolean isValidIdentifierString(String filename)
	{
		return filename.matches("[a-zA-Z0-9._]+");
	}
	
	
	public static String ellipsisStart(String orig, int length)
	{
		if (orig.length() > length) {
			orig = "\u2026" + orig.substring(length, orig.length());
		}
		return orig;
	}
	
	
	public static String ellipsisEnd(String orig, int length)
	{
		if (orig.length() > length) {
			orig = orig.substring(0, length - 1) + "\u2026";
		}
		return orig;
	}
}