public string updateBook(Book bookToUpdate)
{
if (bookToUpdate.Id == Book.newBookId)
{
return("incorrect book id");
}
string result = bookToUpdate.correct();
try
{
if (result == Book.BookCorrect)
{
bool updateResult = database.updateBook(bookToUpdate);
if (updateResult)
{
result = "book updated";
}
else
{
result = "Error while writting to database";
}
}
return(result);
}
catch (Exception e)
{
return("Error while writting to database");
}
}
public string addNewBook(Book newBook)
{
if (newBook.Id != Book.newBookId)
{
return("incorrect book id");
}
string result = newBook.correct();
try
{
if (result == Book.BookCorrect)
{
bool addResult = database.addNewBook(newBook);
if (addResult)
{
result = "book added";
}
else
{
result = "Error while writting to database";
}
}
return(result);
}
catch (Exception e)
{
return("Error while writting to database");
}
}
