// --------------------------------------------------------------------------------------------------------------------
// <copyright file="ExtensionMethods.cs" company="HandBrake Project (http://handbrake.fr)">
//   This file is part of the HandBrake source code - It may be used under the terms of the GNU General Public License.
// </copyright>
// <summary>
//   The extension methods.
// </summary>
// --------------------------------------------------------------------------------------------------------------------

namespace HandBrakeWPF.Utilities
{
    using System.Linq.Expressions;
    using System.Reflection;

    /// <summary>
    /// The extension methods.
    /// </summary>
    public static class ExtensionMethods
    {
        /// <summary>
        /// Converts an expression into a <see cref="MemberInfo"/>.
        /// </summary>
        /// <param name="expression">
        /// The expression to convert.
        /// </param>
        /// <returns>
        /// The member info.
        /// </returns>
        public static MemberInfo GetMemberInfo(this Expression expression)
        {
            var lambda = (LambdaExpression)expression;

            MemberExpression memberExpression;
            if (lambda.Body is UnaryExpression)
            {
                var unaryExpression = (UnaryExpression)lambda.Body;
                memberExpression = (MemberExpression)unaryExpression.Operand;
            }
            else
            {
                memberExpression = (MemberExpression)lambda.Body;
            }

            return memberExpression.Member;
        }
    }
}
