/// <summary>
/// Adds the bookData into the Books database, but only if it's not already present.
/// If it's already
/// </summary>
/// <param name="bookData"></param>
/// <returns>0=not added, 1=added. Technical is the count of the number added.</returns>
public static int BookAdd(BookDataContext bookdb, BookData book, ExistHandling handling)
{
int retval = 0;
NQueries++;
lock (bookdb)
{
switch (handling)
{
case ExistHandling.IfNotExists:
if (bookdb.Books.Find(book.BookId) == null)
{
bookdb.Books.Add(book);
retval++;
}
break;
case ExistHandling.CatalogOverrideFast:
{
var dbbook = bookdb.Books.Find(book.BookId);
if (dbbook == null)
{
bookdb.Books.Add(book);
retval++;
}
else // have to be smart.
{
if (dbbook.BookSource.StartsWith(BookData.BookSourceBookMarkFile))
{
// The database was added to from a bookmark file.
// For these books, the dbbook top-level data isn't correct but the user data is correct.
// At the same time, the new book top-level data IS correct, but the user data is not correct.
BookData.Merge(dbbook, book);
retval++;
}
}
}
break;
case ExistHandling.SmartCatalogOverride:
{
var dbbook = bookdb.Books.Find(book.BookId);
if (dbbook == null)
{
bookdb.Books.Add(book);
retval++;
}
else // have to be smart.
{
if (dbbook.BookSource.StartsWith(BookData.BookSourceBookMarkFile))
{
// The database was added to from a bookmark file.
// For these books, the dbbook top-level data isn't correct but the user data is correct.
// At the same time, the new book top-level data IS correct, but the user data is not correct.
BookData.Merge(dbbook, book);
retval++;
}
else
{
// Grab the full data including the number of files
dbbook = CommonQueries.BookGetFiles(bookdb, book.BookId);
var mustReplace = book.Files.Count != dbbook.Files.Count;
// In case the files don't match exactly....
if (!mustReplace)
{
//TODO: make faster? Or keep because it's needed functionality?
mustReplace = !BookData.FilesMatch(book, dbbook);
}
if (mustReplace)
{
//FAIL: project gutenberg LOVES changing their URLs. If the old list doesn't match the
// new list in number of files, then dump ALL the old values and replace them with the
// new ones.
// TODO: actually verify that the files match?
// Can't use clear because it doesn't work: dbbook.Files.Clear();
// (Seriously: it doesn't work because Files doesn't implement it and will throw)
for (int i = dbbook.Files.Count - 1; i >= 0; i--)
{
dbbook.Files.RemoveAt(i);
}
foreach (var file in book.Files)
{
if (file.Id != 0)
{
file.Id = 0; // if it's straight from the catalog, it should have no id
}
dbbook.Files.Add(file);
}
retval++;
}
}
}
}
break;
}
return(retval);
}
}