public decimal CalculateFine(IBookLending bookLending)
{
var result = DateTime.Now - bookLending.Date.AddDays(10);
return(result.Days * 1.30m);
}
public void ReturnBook(IBookLending bookLanding)
{
this.SystemService.BookLendings.Remove(bookLanding);
bookLanding.BookItem.Rack.BookItems.Add(bookLanding.BookItem);
}
public bool ValidateLendPeriod(IBookLending bookLending)
{
return(bookLending.Date.AddDays(10) >= DateTime.Now);
}
