Wino-Mail/Wino.Core.Domain/Models/Comparers/ListItemComparer.cs

using System;
using System.Collections.Generic;
using Wino.Core.Domain.Models.MailItem;

namespace Wino.Core.Domain.Models.Comparers
{
    public class ListItemComparer : IComparer<object>
    {
        public bool SortByName { get; set; }

        public DateComparer DateComparer = new DateComparer();
        public readonly NameComparer NameComparer = new NameComparer();

        public int Compare(object x, object y)
        {
            if (x is IMailItem xMail && y is IMailItem yMail)
            {
                var itemComparer = GetItemComparer();

                return itemComparer.Compare(xMail, yMail);
            }
            else if (x is DateTime dateX && y is DateTime dateY)
                return DateTime.Compare(dateY, dateX);
            else if (x is string stringX && y is string stringY)
                return stringY.CompareTo(stringX);

            return 0;
        }

        public IComparer<IMailItem> GetItemComparer()
        {
            if (SortByName)
                return NameComparer;
            else
                return DateComparer;
        }
    }
}