/***************************************************************************
 *                               Insensitive.cs
 *                            -------------------
 *   begin                : May 1, 2002
 *   copyright            : (C) The RunUO Software Team
 *   email                : info@runuo.com
 *
 *   $Id$
 *
 ***************************************************************************/

/***************************************************************************
 *
 *   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.
 *
 ***************************************************************************/

using System;
using System.Collections.Generic;

namespace Server
{
  public static class Insensitive
  {
    public static IComparer<string> Comparer{ get; } = StringComparer.OrdinalIgnoreCase;

    public static int Compare(string a, string b) => Comparer.Compare(a, b);

    public static bool Equals(string a, string b)
    {
      if (a == null && b == null)
        return true;
      if (a == null || b == null || a.Length != b.Length)
        return false;

      return Comparer.Compare(a, b) == 0;
    }

    public static bool StartsWith(string a, string b)
    {
      if (a == null || b == null || a.Length < b.Length)
        return false;

      return Comparer.Compare(a.Substring(0, b.Length), b) == 0;
    }

    public static bool EndsWith(string a, string b)
    {
      if (a == null || b == null || a.Length < b.Length)
        return false;

      return Comparer.Compare(a.Substring(a.Length - b.Length), b) == 0;
    }

    public static bool Contains(string a, string b)
    {
      if (a == null || b == null || a.Length < b.Length)
        return false;

      a = a.ToLower();
      b = b.ToLower();

      return a.IndexOf(b) >= 0;
    }
  }
}