/// <summary>
/// Remove 1 from the quantity of books if book quantity is 1 or more
/// </summary>
/// <param name="itemID"></param>
/// <returns></returns>
public async Task SellBook(string itemID, string username)
{
int id;
if (int.TryParse(itemID, out id) == false)
{
await GeneralLibraryLogic.SaveToLogFile("Wrong id cannot convert to int");
throw new BLLBookException("Cannot sell a book id is not correct");
}
Book b1 = await GetBook(itemID);
if (b1.Quantity > 0)
{
b1.Quantity -= 1;
}
else
{
await GeneralLibraryLogic.SaveToLogFile("Cannot sell a book out of stock");
throw new BLLBookException("Cannot sell a book out of stock");
}
try
{
await UpdateBook(itemID, b1.Name, b1.Writer, b1.PrintDate.ToString(), b1.Publisher, b1.Genre.Name, b1.Discount.ToString(), b1.Quantity.ToString(), b1.Price.ToString(), b1.ISBN, b1.Edition, b1.Summary);
await _saleService.AddNewSale(username, id, 1);
}
catch (Exception e)
{
if (e is BookException ||
e is DALException)
{
await GeneralLibraryLogic.SaveToLogFile(e.ToString());
throw new BLLBookException("Cannot sell a book atm try again later or call a manager");
}
else
{
await GeneralLibraryLogic.SaveToLogFile(e.ToString());
throw new LibraryException("Unknown error inform a manager!");
}
}
}
/// <summary>
/// Removes 1 from the quantity of the journal if the quantity is 1 or more
/// </summary>
/// <param name="itemID"></param>
/// <returns></returns>
public async Task SellJournal(string itemID, string username)
{
int id;
if (int.TryParse(itemID, out id) == false)
{
await GeneralLibraryLogic.SaveToLogFile("ID is not valid cannot convert to int!");
throw new BLLJournalException("ID is not valid cannot convert to int!");
}
try
{
Journal j1 = await GetJournal(itemID);
if (j1.Quantity > 0)
{
j1.Quantity -= 1;
}
await UpdateJournal(itemID, j1.Name, j1.Writer, j1.PrintDate.ToString(), j1.Publisher, j1.Genre.Name, j1.Discount.ToString(), j1.Quantity.ToString(), j1.Price.ToString(), j1.Subject);
await _saleService.AddNewSale(username, id, 1);
}
catch (Exception e)
{
if (e is BLLJournalException ||
e is DALException)
{
await GeneralLibraryLogic.SaveToLogFile(e.ToString());
throw new BLLJournalException("Cannot sell a journal atm try again later or call a manager");
}
else
{
await GeneralLibraryLogic.SaveToLogFile(e.ToString());
throw new LibraryException("Unknown error inform a manager!");
}
}
}