RhSolutions.SkuParser/RhSolutions.SkuParser.Api/Models/Product.cs

using System.Text.RegularExpressions;

namespace RhSolutions.SkuParser.Models;

public record Product
{
	private string _sku = string.Empty;
	private const string _parsePattern = @"(?<Lead>[1\s]|^|\b)(?<Article>\d{6})(?<Delimiter>[\s13-])(?<Variant>\d{3})(\b|$)";
	private const string _validnessPattern = @"^1\d{6}[1|3]\d{3}$";

	/// <summary>
	/// Артикул РЕХАУ в заданном формате
	/// </summary>
	public required string Sku
	{
		get => _sku;
		set
		{
			_sku = IsValudSku(value)
				? value
				: throw new ArgumentException("$Неверный артикул: {value}");
		}
	}
	public ProductLine? ProductLine { get; set; }
	public string? Name { get; set; }
	public decimal? Price { get; set; }

	private static bool IsValudSku(string value)
	{
		return Regex.IsMatch(value.Trim(), _validnessPattern);
	}
	private static string GetSku(Match match)
	{
		string lead = match.Groups["Lead"].Value;
		string article = match.Groups["Article"].Value;
		string delimiter = match.Groups["Delimiter"].Value;
		string variant = match.Groups["Variant"].Value;

		if (lead != "1" && delimiter == "-")
		{
			return $"1{article}1{variant}";
		}
		else
		{
			return $"{lead}{article}{delimiter}{variant}";
		}
	}

	/// <summary>
	/// Проверка строки на наличие в ней артикула РЕХАУ
	/// </summary>
	/// <param name="value">Входная строка для проверки</param>
	/// <param name="product">Артикул, если найден. null - если нет</param>
	/// <returns>Если артикул в строке есть возвращает true, Если нет - false</returns>
	public static bool TryParse(string value, out Product? product)
	{
		product = null;
		MatchCollection matches = Regex.Matches(value, _parsePattern);
		if (matches.Count == 0)
		{
			return false;
		}
		string sku = GetSku(matches.First());
		product = new Product() { Sku = sku };
		return true;
	}
	public override int GetHashCode() => Sku.GetHashCode();
	public override string ToString() => Sku;
}