RhSolutions-Api/RhSolutions.Api/Services/FlexPipeQueryModifier.cs

using System.Text;
using System.Text.RegularExpressions;
using Microsoft.AspNetCore.Http.Extensions;

namespace RhSolutions.Api.Services
{
	public class FlexPipeQueryModifier : IProductQueryModifier
	{
		protected virtual string diameterPattern { get; } = @"\b(16|20|25|32|40|50|63)\b";
		protected virtual string typePattern { get; } = @"бухт|отр|штанг";
		protected virtual string pipeName { get; } = "Flex";
		protected virtual Dictionary<string, string> diameterNames { get; } = new()
		{
			["16"] = "16x2,2",
			["20"] = "20x2,8",
			["25"] = "25x3,5",
			["32"] = "32x4,4",
			["40"] = "40x5,5",
			["50"] = "50x6,9",
			["63"] = "63x8,6"
		};		

		public bool TryQueryModify(IQueryCollection collection, out QueryString queryString)
		{
			queryString = QueryString.Empty;
			StringBuilder sb = new();
			
			string query = collection["query"].ToString();
			if (string.IsNullOrEmpty(query))
			{
				return false;
			}
			
			sb.Append($"Труба {pipeName} ");
			var diameterMatches = Regex.Matches(query, diameterPattern);
			string diameter;
			if (diameterMatches.Count > 0)
			{
				diameter = diameterMatches.First().Value;
				sb.Append($"{diameterNames[diameter]} " );
			}
			else
			{
				return false;
			}
			var typeMatches = Regex.Matches(query, typePattern);
			if (typeMatches.Count > 0)
			{
				var type = typeMatches.First().Value;
				if (type.StartsWith("отр") || type.StartsWith("штанг"))
				{
					sb.Append("прям.отрезки");
				}
				else
				{
					sb.Append("бухта");
				}
			}
			else if (int.Parse(diameter) < 32)
			{
				sb.Append("бухта");
			}
			else
			{
				sb.Append("прям.отрезки");
			}
			
			QueryBuilder qb = new()
			{
				{ "query", sb.ToString() }
			};
			queryString = qb.ToQueryString();
			return true;
		}
	}
}