EPPlus/FormulaParsing/Exceptions/ExcelErrorCodes.cs

/*******************************************************************************
 * You may amend and distribute as you like, but don't remove this header!
 *
 * EPPlus provides server-side generation of Excel 2007/2010 spreadsheets.
 * See http://www.codeplex.com/EPPlus for details.
 *
 * Copyright (C) 2011  Jan Källman
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.

 * This library 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 Lesser General Public License for more details.
 *
 * The GNU Lesser General Public License can be viewed at http://www.opensource.org/licenses/lgpl-license.php
 * If you unfamiliar with this license or have questions about it, here is an http://www.gnu.org/licenses/gpl-faq.html
 *
 * All code and executables are provided "as is" with no warranty either express or implied.
 * The author accepts no liability for any damage or loss of business that this product may cause.
 *
 * Code change notes:
 *
 * Author							Change						Date
 * ******************************************************************************
 * Mats Alm   		                Added       		        2013-03-01 (Prior file history on https://github.com/swmal/ExcelFormulaParser)
 *******************************************************************************/

using System.Collections.Generic;
using System.Linq;

namespace OfficeOpenXml.FormulaParsing.Exceptions;

public class ExcelErrorCodes {
  private ExcelErrorCodes(string code) {
    Code = code;
  }

  public string Code { get; private set; }

  public override int GetHashCode() {
    return Code.GetHashCode();
  }

  public override bool Equals(object obj) {
    if (obj is ExcelErrorCodes codes) {
      return codes.Code.Equals(Code);
    }
    return false;
  }

  public static bool operator ==(ExcelErrorCodes c1, ExcelErrorCodes c2) {
    return c1.Code.Equals(c2.Code);
  }

  public static bool operator !=(ExcelErrorCodes c1, ExcelErrorCodes c2) {
    return !c1.Code.Equals(c2.Code);
  }

  private static readonly IEnumerable<string> Codes = new List<string> {
    Value.Code,
    Name.Code,
    NoValueAvaliable.Code,
  };

  public static bool IsErrorCode(object valueToTest) {
    if (valueToTest == null) {
      return false;
    }
    var candidate = valueToTest.ToString();
    if (Codes.FirstOrDefault(x => x == candidate) != null) {
      return true;
    }
    return false;
  }

  public static ExcelErrorCodes Value => new("#VALUE!");

  public static ExcelErrorCodes Name => new("#NAME?");

  public static ExcelErrorCodes NoValueAvaliable => new("#N/A");
}