// Copyright 2009-2024 Josh Close
// This file is a part of CsvHelper and is dual licensed under MS-PL and Apache 2.0.
// See LICENSE.txt for details or visit http://www.opensource.org/licenses/ms-pl.html for MS-PL and http://opensource.org/licenses/Apache-2.0 for Apache 2.0.
// https://github.com/JoshClose/CsvHelper
using System.Text.RegularExpressions;

namespace CsvHelper.Configuration.Attributes;

/// <summary>
/// Gets the characters that are used for injection attacks.
/// </summary>
[AttributeUsage(AttributeTargets.Class, AllowMultiple = false, Inherited = true)]
public class InjectionCharactersAttribute : Attribute, IClassMapper
{
	/// <summary>
	/// Gets the characters that are used for injection attacks.
	/// Default is '=', '@', '+', '-', '\t', '\r'.
	/// </summary>
	public char[] InjectionCharacters { get; private set; }

	/// <summary>
	/// Gets the characters that are used for injection attacks.
	/// </summary>
	/// <param name="injectionCharacters"></param>
	public InjectionCharactersAttribute(string injectionCharacters)
	{
		InjectionCharacters = Regex.Split(injectionCharacters, @"\s+").Select(s => s[0]).ToArray();
	}

	/// <inheritdoc />
	public void ApplyTo(CsvConfiguration configuration)
	{
		configuration.InjectionCharacters = InjectionCharacters;
	}
}
