namespace textUtility
{


using System;
using System.Collections;
	using System.Collections.Generic;
	
	using UnityEngine;
	
	public static class StringExtension
	{
	    public static bool IsNullOrEmpty(this string str)
	    {
	        return string.IsNullOrEmpty(str);
	    }

        public static string Unwrap(this string str)
        {
            int leftIndex = str.IndexOf('(') + 1;
            int rightIndex = str.LastIndexOf(')') - 1;
            return str.Substring(leftIndex, rightIndex - leftIndex + 1);
        }

        public static string Replace(this string str, int index, int length, string newStr)
        {
            str = str.Remove(index, length);
            str = str.Insert(index, newStr);
            return str;
        }

    public static string Between(this string str, int startIndex, int endIndex)
    {
        if (startIndex > endIndex)
        {
            throw new Exception();
        }
        else if (startIndex == endIndex)
        {
            return str[startIndex].ToString();
        }
        else
        {
            return str.Substring(startIndex, endIndex - startIndex + 1);
        }
    }

    public static List<string> ReplaceAll(this List<string> strings, string oldValue, string newValue)
	    {
	        List<string> results = new List<string>();
	        for (int i = 0; i < strings.Count; i++)
	        {
	            results.Add(strings[i].Replace(oldValue, newValue));
	        }
	        return results;
	    }
	}


}