SalePutUpDate.cs

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using System;
using System.Collections.Generic;
using System.Text;

namespace HouseOver.THARM.CustomerCatalogue.Compares
{
    public class SalePutUpDateComparer : IComparer<Customer>
    {
        private CatalogueData data;

        public SalePutUpDateComparer(CatalogueData data)
        {
            this.data = data;
        }
        
        public int Compare(Customer x, Customer y)
        {
            DateTime c1 = DateTime.Now;
            DateTime c2 = DateTime.Now;

            foreach (Sale s in data.GetSales(x))
            {
                if (s.PutUpForSale < c1) c1 = s.PutUpForSale;
            }

            foreach (Sale s in data.GetSales(y))
            {
                if (s.PutUpForSale < c2) c2 = s.PutUpForSale;
            }

            return c1.CompareTo(c2);
        }
    }
}

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