// 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
namespace CsvHelper;

/// <summary>
/// Function that is called when a missing field is found. The default function will
/// throw a <see cref="MissingFieldException"/>. You can supply your own function to do other things
/// like logging the issue instead of throwing an exception.
/// </summary>
public delegate void MissingFieldFound(MissingFieldFoundArgs args);

/// <summary>
/// MissingFieldFound args.
/// </summary>
public readonly struct MissingFieldFoundArgs
{
	/// <summary>
	/// The header names.
	/// </summary>
	public readonly string[]? HeaderNames;

	/// <summary>
	/// The index.
	/// </summary>
	public readonly int Index;

	/// <summary>
	/// The context.
	/// </summary>
	public readonly CsvContext Context;

	/// <summary>
	/// Creates a new instance of MissingFieldFoundArgs.
	/// </summary>
	/// <param name="headerNames">The header names.</param>
	/// <param name="index">The index.</param>
	/// <param name="context">The context.</param>
	public MissingFieldFoundArgs(string[]? headerNames, int index, CsvContext context)
	{
		HeaderNames = headerNames;
		Index = index;
		Context = context;
	}
}
