public IEnumerable<Order> GetPastOrders(int waiterId, int firstIndex, int lastIndex)
{
if (!CheckHasUserRole(waiterId, UserRole.Waiter))
throw new SecurityException(String.Format("User id={0} is not logged in or is not a waiter.", waiterId));
if(firstIndex < 0)
throw new ArgumentException(String.Format("firstIndex ({0]) is smaller than zero", firstIndex));
if(lastIndex < 0)
throw new ArgumentException(String.Format("lastIndex ({0]) is smaller than zero", lastIndex));
if (firstIndex > lastIndex)
throw new ArgumentException(String.Format("firstIndex ({0}) is larger than lastIndex ({1})", firstIndex, lastIndex));
using(var db = new DataAccessProvider())
{
var sortedList = db.Orders.Include("MenuItems").Include("MenuItems.MenuItem").Include("MenuItems.MenuItem.Category").Include("Waiter").Include("Table").Where(o => o.Waiter.Id == waiterId && !o.IsDeleted && (o.State == OrderState.Realized || o.State == OrderState.NotRealized)).OrderByDescending(o => o.ClosingDate).ToList();
//Kelner obsłużył mniej zamówień niż pierwszy indeks
if (sortedList.Count < firstIndex + 1)
return new Order[0];
//Indeks końcowy i początkowy taki sam - zwracamy jedną wartość
if (firstIndex == lastIndex)
return new Order[1] { new Order(sortedList[firstIndex]) };
//Kelner ma mniej zamówień niż indeks końcowy - zwracamy od indeksu początkowego do końca
if(sortedList.Count < lastIndex + 1)
{
var result = new OrderEntity[sortedList.Count - firstIndex];
sortedList.CopyTo(firstIndex, result, 0, sortedList.Count - firstIndex);
return result.Select( o => new Order(o)).ToList();
}
var resultOrders = new OrderEntity[lastIndex - firstIndex + 1];
sortedList.CopyTo(firstIndex, resultOrders, 0, lastIndex - firstIndex + 1);
return resultOrders.Select( o => new Order(o)).ToList();
}
}
