public double ComputeNecessaryFee(BookCopy bookCopy, TransactionInfo bookTransInfo)
{
var bookInfo = _BookCopyService.GetBookInfo(bookCopy);
if (bookInfo == null)
{
throw new InvalidOperationException("Book copy has no known book information.");
}
var section = _SectionService.GetBookSection(bookInfo);
if (section == null)
{
throw new InvalidOperationException("The book does not belong to a section.");
}
if (DateTime.Now.Date <= bookTransInfo.ExpectedReturnDate.Date)
{
return(0);
}
return((DateTime.Now.Date - bookTransInfo.ExpectedReturnDate.Date).Days * section.LateReturningFee);
}
private void LongRangeReader_TagRead(object sender, string e)
{
try
{
var bookCopy = _BookCopyService.FindByLongRange(e);
if (bookCopy.IsBorrowed == false)
{
var handler = UnborrowedIsGoingOut;
if (handler != null)
{
handler(this, new Models.BookCopyWithInfo
{
BookCopy = bookCopy,
BookInfo = _BookCopyService.GetBookInfo(bookCopy)
});
}
}
}
catch (Exception)
{ }
}