Bug fix for reviews.co.uk Woocommerce plugin, when WPLister integrated - products from eBay sales may not contain a sku, as they're not products from WooCommerce - this resolves that issue

woocommerce-reviews.php

public function processCompletedOrder($order_id)
        {
            update_post_meta($order_id, '_reviewscouk_status', 'processed');

            $api_url = $this->getApiDomain();
            $order   = new WC_Order($order_id);
            $items   = $order->get_items();

            $p = array();
            foreach ($items as $row) {
                $productmeta = wc_get_product($row['product_id']);
                if ( ! $productmeta ) {
                    continue;
                }
                if(isset($productmeta)){
                    $sku = get_option('product_identifier') == 'id' ? $row['product_id'] : $productmeta->get_sku();

                    if ($productmeta->get_type() == 'variable' && get_option('use_parent_product') != 1) {
                        $available_variations = $productmeta->get_available_variations();
                        foreach ($available_variations as $variation) {
                            if ($variation['variation_id'] == $row['variation_id']) {
                                $sku = get_option('product_identifier') == 'id' ? $variation['variation_id'] : $variation['sku'];
                            }
                        }
                    }

                    $url = get_permalink($row['product_id']);

                    $attachment_url = wp_get_attachment_url(get_post_thumbnail_id($row['product_id']));

                    if (!(get_option('disable_reviews_per_product') == '1' && $productmeta->post->comment_status == 'closed')) {
                        $p[] = array(
                            'sku'     => $sku,
                            'name'    => $row['name'],
                            'image'   => $attachment_url,
                            'pageUrl' => $url,
                        );
                    }
                }
            }

            $country_code = 'GB';
            if (isset($order->get_address()['country'])) {
                $country_code = $order->get_address()['country'];
            }

            $data = array(
                'order_id' => $order->get_order_number(),
                'email'    => $order->get_billing_email(),
                'name'     => $order->get_billing_first_name() . ' ' . $order->get_billing_last_name(),
                'source'   => 'woocom',
                'products' => $p,
                'country_code' => $country_code,
            );

            if (get_option('api_key') != '' && get_option('store_id') != '' && get_option('send_product_review_invitation') == '1' && count($data['products']) > 0) {
                $this->apiPost('product/invitation', $data);
            }

            if (get_option('api_key') != '' && get_option('store_id') != '' && get_option('send_merchant_review_invitation') == '1') {
                $this->apiPost('merchant/invitation', $data);
            }
        }