HttpMethodConverter.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Net.Http;
using Cuemon.Collections.Generic;
using Cuemon.Text;

namespace Cuemon.Net.Http
{
    /// <summary>
    /// This utility class is designed to make <see cref="HttpMethod"/> related conversions easier to work with.
    /// </summary>
    public static class HttpMethodConverter
    {
        private static readonly IDictionary<string, HttpMethods> StringToHttpMethodLookupTable = InitStringToHttpMethodLookupTable();

        private static IDictionary<string, HttpMethods> InitStringToHttpMethodLookupTable()
        {
            var result = new Dictionary<string, HttpMethods>(StringComparer.OrdinalIgnoreCase);
            foreach (var pair in new EnumReadOnlyDictionary<HttpMethods>().Select(pair => pair.Value))
            {
                result.Add(pair, ParserFactory.FromEnum().Parse<HttpMethods>(pair));
            }
            return result;
        }

        /// <summary>
        /// Converts the specified <paramref name="method"/> to its equivalent <see cref="HttpMethods"/> representation.
        /// </summary>
        /// <param name="method">The <see cref="HttpMethod"/> to be converted.</param>
        /// <returns>A <see cref="HttpMethods"/> representation of the specified <paramref name="method"/>.</returns>
        /// <exception cref="ArgumentNullException">
        /// <paramref name="method"/> cannot be null.
        /// </exception>
        public static HttpMethods ToHttpMethod(HttpMethod method)
        {
            Validator.ThrowIfNull(method);
            if (!StringToHttpMethodLookupTable.TryGetValue(method.Method, out var result))
            {
                result = HttpMethods.Get;
            }
            return result;
        }
    }
}