public static List <TourChiTietViewModel> Loc_CollaborativeFiltering(List <TourDaDatViewModel> cart, string maTourChon, int soLuongChon)
{
var dsTourGioHang = LayDSTourGioHang(cart);
var bestCustomer = TimHoaDonTotNhat(dsTourGioHang, TimHD(maTourChon));
if (bestCustomer != null)
{
//Lay Ds rate bang duc lo
Dictionary <string, double> ketQuaChiSoR = new Dictionary <string, double>();
foreach (var item in dsTourGioHang)
{
double sim;
if (item.soluong == 0)
{
sim = bestCustomer.FirstOrDefault(t => t.matour == item.matour).soluong;
}
else
{
sim = item.soluong;
}
ketQuaChiSoR.Add(item.matour, sim);
}
//------------------------
var res = ketQuaChiSoR.OrderByDescending(t => t.Value).Select(t => t.Key).ToList();
int chiSoTourDangChon = res.FindIndex(t => t == maTourChon);
res.RemoveAt(chiSoTourDangChon);
var collection = res.Take(soLuongChon).ToList();
//Lay Chi tiet Tour
List <TourChiTietViewModel> ketQua = new List <TourChiTietViewModel>();
if (collection.Count > 0)
{
foreach (var item in collection)
{
ketQua.Add(TourQueries.TimTour(item));
}
}
return(ketQua);
}
return(null);
}