using UnityEngine;

using System;
using System.Collections;

public static class ExtensionString
{
    public static T ToEnum<T>(this string str)
    {
        return (T)Enum.Parse(typeof(T), str);
    }

    public static string Remove(this string str, int startIndex, int endIndex, bool empty)
    {
        if (startIndex > endIndex)
        {
            throw new Exception();
        }

        return str.Remove(startIndex, endIndex - startIndex + 1);
    }

    public static string Replace(this string str, int startIndex, int endIndex, string newStr)
    {
        if (startIndex > endIndex)
        {
            throw new Exception();
        }

        str = str.Remove(startIndex, endIndex - startIndex + 1);

        str = str.Insert(startIndex, newStr);

        return str;
    }

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