public void AddLending(LibraryItem item, User user, DateTime lendingDate)
{
var lendingDetails = new LendingDetails(item, user, lendingDate);
this.lendings.Add(lendingDetails);
user.AddLending(lendingDetails);
}
public void Register(LibraryItem item)
{
var checkitem = this.store.GetItem(item.ID);
if (checkitem != null)
{
throw new ArgumentException(
String.Format("El elemento con el ID {0} ya existe en el catálogo.", item.ID)
, "item");
}
this.store.AddItem(item);
}
public LendingDetails(LibraryItem item, User user, DateTime lendingDate)
{
this.User = user;
this.Item = item;
this.LendingDate = lendingDate;
}
public void AddItem(Entities.LibraryItem item)
{
this.catalog.Add(item);
}
public LendingDetails(LibraryItem item, User user, DateTime lendingDate)
{
this.User = user;
this.Item = item;
this.LendingDate = lendingDate;
}
public void RemoveLending(LibraryItem item, User user, DateTime returnDate)
{
var lending = lendings.Where(i => i.Item.ID == item.ID).Single();
this.lendings.Remove(lending);
user.RemoveLending(lending);
}
public bool IsAvailableForLending(LibraryItem item, DateTime lendingDate)
{
var alreadyExistingLending = this.lendings.Where(x => x.Item.ID == item.ID).FirstOrDefault();
return alreadyExistingLending == null;
}
private bool UserHasExceededLendingLength(LibraryItem item, User user, DateTime date)
{
bool result = false;
var lending = user.Lendings.Where(l => l.Item.ID == item.ID).Single();
var elapsedDays = (date - lending.LendingDate).Days;
if (elapsedDays > item.DaysToLend())
{
result = true;
}
return result;
}
private bool UserHasOutstandingLending(LibraryItem item, User user)
{
bool result = false;
if (user.Lendings.Count() == 0)
{
return false;
}
if (user.Lendings.Any(x => x.Item.ID == item.ID))
{
result = true;
}
return result;
}
private bool UserCanCurrentlyLendItem(LibraryItem item, User user)
{
bool result = false;
if (user.Status == UserStatus.Blocked)
{
return result;
}
if (user.Lendings.Count(l => l.Item.GetType() == item.GetType()) < item.MaximumNumberOfItemsInLending())
{
result = true;
}
return result;
}