RhSolutions-AddIn/src/Services/RhDatabaseClient.cs

using Newtonsoft.Json;
using RhSolutions.AddIn;
using RhSolutions.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using System.Threading.Tasks;

namespace RhSolutions.Services
{
    public static class RhDatabaseClient
    {
        private static HttpClient httpClient = RhSolutionsAddIn.httpClient;

        public static async Task<object> GetProduct(string line)
        {
            string request = string.Empty;

            if (line.IsRehauSku())
            {
                request = @"https://rh.cebotari.ru/api/products/" + line;
            }

            else
            {
                request = @"https://rh.cebotari.ru/api/search?query=" + line;
            }

            var response = await httpClient.GetAsync(request);

            try
            {
                response.EnsureSuccessStatusCode(); 
                string json = await response.Content.ReadAsStringAsync();
                var product = JsonConvert.DeserializeObject<IEnumerable<Product>>(json)
                    .FirstOrDefault();

                if (product == null)
                {
                    return null;
                }
                else
                {
                    if (line.IsRehauSku())
                    {
                        return product.Name;
                    }
                    else
                    {
                        return $"{product.ProductSku} {product.Name}";
                    }
                }
            }
            catch
            {
                return $"Ошибка сервера {response.StatusCode}";
            }

        }
    }
}