/**
  * Get the order data format for a single column per line item, compatible with the CSV Import Suite plugin
  *
  * @since 3.0
  * @param array $order_data an array of order data for the given order
  * @param WC_Order $order the WC_Order object
  * @return array modified order data
  */
 private function get_legacy_import_one_column_per_line_item($order_data, WC_Order $order)
 {
     $count = 1;
     // add line items
     foreach ($order->get_items() as $_ => $item) {
         // sku/qty/price
         $product = $order->get_product_from_item($item);
         if (!is_object($product)) {
             $product = new WC_Product(0);
         }
         $sku = $product->get_sku();
         // note that product ID must be prefixed with `product_id:` so the importer can properly parse it vs. the SKU
         $product_id = SV_WC_Plugin_Compatibility::product_get_id($product);
         $line_item = array($sku ? $sku : "product_id:{$product_id}", $item['qty'], $order->get_line_total($item));
         // Add item meta
         $item_meta = new WC_Order_Item_Meta($item);
         $formatted_meta = $item_meta->get_formatted();
         if (!empty($formatted_meta)) {
             foreach ($formatted_meta as $meta_key => $meta) {
                 // remove newlines
                 $label = str_replace(array("\r", "\r\n", "\n"), '', $meta['label']);
                 $value = str_replace(array("\r", "\r\n", "\n"), '', $meta['value']);
                 // escape reserved chars (:;|)
                 $label = str_replace(array(': ', ':', ';', '|'), array('\\: ', '\\:', '\\;', '\\|'), $meta['label']);
                 $value = str_replace(array(': ', ':', ';', '|'), array('\\: ', '\\:', '\\;', '\\|'), $meta['value']);
                 $line_item[] = wp_kses_post($label . ': ' . $value);
             }
         }
         $order_data["order_item_{$count}"] = implode('|', $line_item);
         $count++;
     }
     $count = 1;
     foreach ($order->get_items('shipping') as $_ => $shipping_item) {
         $order_data["shipping_method_{$count}"] = $shipping_item['method_id'];
         $order_data["shipping_cost_{$count}"] = wc_format_decimal($shipping_item['cost'], 2);
         $count++;
     }
     // fix order numbers
     $order_data['order_id'] = $order->id;
     $order_data['order_number_formatted'] = get_post_meta($order->id, '_order_number_formatted', true);
     $order_data['order_number'] = get_post_meta($order->id, '_order_number', true);
     // fix customer user
     $user = new WP_User($order_data['customer_id']);
     $order_data['customer_id'] = $user->user_email;
     return $order_data;
 }