Differences From The Original Version

This plugin is based on a version authored by Numinix back in 2012. It's been brought up to current Zen Cart, PHP and product-data specification standards and has been tested with Zen Cart versions 2.0.0 through 3.0.0-dev and PHP versions 8.0 through 8.5.

Besides an overall restructuring, there are some functional differences between this version and the (now commercial) Numinix version:

1. Database configuration constants now start with GPSF_ instead of GOOGLE_PRODUCTS_.
2. There is no longer a feed-specific /auto_loaders file, so any site-specific changes that monitor the generation of a product's pricing are now in-effect while the feed is being generated.
3. Non-base Zen Cart database values that are used for a feed's items' attributes can now be provided via separate 'extension' classes:
   • Database values that provide the item's g:gtin, g:upc, g:isbn, g:ean, g:condition, g:promotion_id. The configuration settings that previously indicated these values' presence in the database have been removed.
   • An item's MAP pricing. The configuration settings that previously indicated this value's present in the database have been removed.
   • Shipping methods other than the built-in flat, item, perweightunit, table and zones.
   • Magic SEO URLs.
   • Plugins that provide variant-specific stock quantities.
4. Programmatic feed uploads to Google are no longer supported. You can log into your Google Merchant Center account and either upload the generated feed manually or instruct Google to periodically upload the feed itself.
5. The "Website Address" for the feed's <link> attribute is no longer used; the site's address (HTTP_SERVER . DIR_WS_INCLUDES) from the storefront configure.php file is used instead.

If you're converting to use the Google Product Search Feeder from the Google Merchant Center Feeder plugin, there's a one-time configuration-copy tool provided by the GPSF plugin. Starting with v1.1.0 of GPSF, that tool is available from the admin's Extras :: Convert Merchant Center Feeder so long as:

1. The Google Merchant Center Feeder's configuration version setting is present.
2. No changes have currently been made to the Google Product Search Feeder's configuration.
3. The configuration-copy tool has not been previously run.