public function action_update_pricing_info()
 {
     WPLA()->logger->info("do_action: wpla_update_pricing_info");
     $accounts = WPLA_AmazonAccount::getAll();
     // $listingsModel = new WPLA_ListingsModel();
     $batch_size = 200;
     // 10 requests per batch (for now - maximum should be 20 requests = 400 items / max. 600 items per minute)
     foreach ($accounts as $account) {
         $account_id = $account->id;
         $listings = WPLA_ListingQueryHelper::getItemsDueForPricingUpdateForAcccount($account_id, $batch_size);
         $listing_ASINs = array();
         WPLA()->logger->info(sprintf('%s items with outdated pricing info found for account %s.', sizeof($listings), $account->title));
         // build array of ASINs
         foreach ($listings as $listing) {
             // skip duplicate ASINs - they throw an error from Amazon
             if (in_array($listing->asin, $listing_ASINs)) {
                 continue;
             }
             $listing_ASINs[] = $listing->asin;
         }
         if (empty($listing_ASINs)) {
             continue;
         }
         // process batches of 20 ASINs
         for ($page = 0; $page < 10; $page++) {
             $page_size = 20;
             // splice ASINs
             $offset = $page * $page_size;
             $ASINs_for_this_batch = array_slice($listing_ASINs, $offset, $page_size);
             if (empty($ASINs_for_this_batch)) {
                 continue;
             }
             // run update
             $this->update_pricing_info_for_asins($ASINs_for_this_batch, $account_id);
             WPLA()->logger->info(sprintf('%s ASINs had their pricing info updated - account %s.', sizeof($listing_ASINs), $account->title));
         }
     }
     // each account
 }