// <copyright>

//   Copyright (c) Microsoft Corporation.  All rights reserved.

// </copyright>



namespace Microsoft.ApplicationServer.Http

{

    using System;

    using System.ComponentModel;

    using Microsoft.Server.Common;



    /// <summary>

    /// Helper class for validating <see cref="TrailingSlashMode"/> values.

    /// </summary>

    internal static class TrailingSlashModeHelper

    {

        private static readonly Type trailingSlashModeType = typeof(TrailingSlashMode);



        /// <summary>

        /// Determines whether the specified <paramref name="value"/> is defined by the <see cref="TrailingSlashMode"/>

        /// enumeration.

        /// </summary>

        /// <param name="value">The value to verify.</param>

        /// <returns>

        /// <c>true</c> if the specified options is defined; otherwise, <c>false</c>.

        /// </returns>

        public static bool IsDefined(TrailingSlashMode value)

        {

            return value == TrailingSlashMode.AutoRedirect ||

                   value == TrailingSlashMode.Ignore;

        }



        /// <summary>

        /// Validates the specified <paramref name="value"/> and throws an <see cref="InvalidEnumArgumentException"/>

        /// exception if not valid.

        /// </summary>

        /// <param name="value">The value to validate.</param>

        /// <param name="parameterName">Name of the parameter to use if throwing exception.</param>

        public static void Validate(TrailingSlashMode value, string parameterName)

        {

            if (!IsDefined(value))

            {

                throw Fx.Exception.AsError(new InvalidEnumArgumentException(parameterName, (int)value, trailingSlashModeType));

            }

        }

    }

}