On Wed, Jul 29, 2009 at 06:27:08AM -0700, Greg Newby wrote:
Thanks for your interest :)
It isn't bundled up for download anywhere. We'll probably need to wait for Marcello's return from vacation to provide details on how to add components like this. The current system is modular & (I think) well-organized, but complex...including lots of stuff that readers never see (such as the cataloger interface and various programs that add new files). Plus, as you know, there is a lot of stuff that is in the Wiki, rather than PHP. The Wiki might be where new features could be added, or there might be modules "out there" that could make it easier.
I did grab catalog/world/bibrec.php , where bibrecs like this are made: http://www.gutenberg.org/etext/11
It is below. This should give you an idea how where various things are tied in from the database, the on-disk cached records, and stuff that is generated on the fly. The various .phh files it references (which cascade to include a whole bunch of stuff) are mostly for presentation (html and css), not functionality.
A bookshelf/shopping cart would probably be a brand new set of files, with just a little overlap with the existing php. It would need to access the database, and presumably would need a table or two to keep track of bookshelf users & entries. (Maybe a separate database...maybe part of the Wiki instead of a standalone set of PHP programs.) Cookies, or something similar, could be used to track user sessions and their bookshelves/shopping carts/whatever, and add an entry to various pages at www.gutenberg.org for them to access it (sort of like a regular ecommerce site).
You know, now that I look at this code, I recall looking over this stuff with Marcello once, years ago...doesn't look like it has changed much. I'll drop a note to Marcello and wait to hear from him. Thanks, Greg!