Beispiel #1
0
func compositeISBNLookup(ctx ae.Context, country string, isbn isbn13.ISBN13) (resp *data.BookMetaData, err error) {
	// look in my own library first - if this fails badly, abort anything further
	if shelf, err := persistence.LookupBookshelf(ctx); err == nil {
		if book := shelf.LookupInfo(isbn); book != nil {
			return book, nil
		}
	} else {
		return nil, err
	}

	var errors ae.MultiError
	if book, err := persistence.LookupISBN(ctx, country, isbn); err == nil {
		return book, nil
	} else {
		errors = append(errors, err)
	}

	if r, err := googlebooks.LookupISBN(ctx, country, isbn); err == nil {
		persistence.StoreISBNResult(ctx, country, isbn, r)
		return r, nil
	} else {
		errors = append(errors, err)
	}

	return nil, errors
}
Beispiel #2
0
func normalize(call *Call, info *data.BookMetaData) {
	var isbn isbn13.ISBN13
	var err error
	if isbn, err = isbn13.New(info.ISBN); err == nil {
		var base *data.BookMetaData
		if base, err = persistence.LookupISBN(call.Context, call.DetermineCountry(), isbn); err == nil {
			info.Volume.Images = base.Volume.Images
			return
		} else {
			info.Volume.Images = data.ImageLinks{}
		}
	} else {
		call.Context.Errorf("Could not normalize data for %s: %s", info.ISBN, err.Error())
	}
}