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enabled = get_option( 'woocommerce_schema_version', 0 ) >= 430; } /** * Is stock reservation enabled? * * @return boolean */ protected function is_enabled() { return $this->enabled; } /** * Query for any existing holds on stock for this item. * * @param \WC_Product $product Product to get reserved stock for. * @param int $exclude_order_id Optional order to exclude from the results. * * @return int|float Amount of stock already reserved. */ public function get_reserved_stock( $product, $exclude_order_id = 0 ) { global $wpdb; if ( ! $this->is_enabled() ) { return 0; } return wc_stock_amount( // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared, WordPress.DB.PreparedSQL.NotPrepared $wpdb->get_var( $this->get_query_for_reserved_stock( $product->get_stock_managed_by_id(), $exclude_order_id ) ) ); } /** * Put a temporary hold on stock for an order if enough is available. * * @throws ReserveStockException If stock cannot be reserved. * * @param \WC_Order $order Order object. * @param int $minutes How long to reserve stock in minutes. Defaults to 60. */ public function reserve_stock_for_order( $order, $minutes = 60 ) { if ( ! $this->is_enabled() ) { return; } /** * Filters the number of minutes an order should reserve stock for. * * This hook allows the number of minutes that stock in an order should be reserved for to be filtered, useful for third party developers to increase/reduce the number of minutes if the order meets certain criteria, or to exclude an order from stock reservation using a zero value. * * @since 8.8.0 * * @param int $minutes How long to reserve stock for the order in minutes. * @param \WC_Order $order Order object. */ $minutes = (int) apply_filters( 'woocommerce_order_hold_stock_minutes', $minutes, $order ); if ( ! $minutes ) { return; } $held_stock_notes = array(); try { $rows = array(); foreach ( $order->get_items() as $item ) { $is_target_item = $item->is_type( OrderItemType::LINE_ITEM ) && $item->get_quantity() > 0; if ( ! $is_target_item ) { continue; } /** @var \WC_Order_Item_Product $item */ // phpcs:ignore Generic.Commenting.DocComment.MissingShort $product = $item->get_product(); if ( ! $product instanceof \WC_Product ) { continue; } if ( ! $product->is_in_stock() ) { throw new ReserveStockException( 'woocommerce_product_out_of_stock', sprintf( /* translators: %s: product name */ __( '"%s" is out of stock and cannot be purchased.', 'woocommerce' ), $product->get_name() ), 403 ); } // If stock management is off, no need to reserve any stock here. if ( ! $product->managing_stock() || $product->backorders_allowed() ) { continue; } $managed_by_id = $product->get_stock_managed_by_id(); /** * Filter order item quantity. * * @since 4.5.0 * @param int|float $quantity Quantity. * @param \WC_Order $order Order data. * @param \WC_Order_Item_Product $item Order item data. */ $item_quantity = apply_filters( 'woocommerce_order_item_quantity', $item->get_quantity(), $order, $item ); $rows[ $managed_by_id ] = $item_quantity + ( $rows[ $managed_by_id ] ?? 0 ); if ( count( $held_stock_notes ) < 5 ) { // translators: %1$s is a product's formatted name, %2$d: is the quantity of said product to which the stock hold applied. $held_stock_notes[] = sprintf( _x( '- %1$s × %2$d', 'held stock note', 'woocommerce' ), $product->get_formatted_name(), $rows[ $managed_by_id ] ); } } if ( ! empty( $rows ) ) { // Reliability: consistent lock order = no cross-product ordering deadlocks from concurrent orders with same products added in different sequences. ksort( $rows ); foreach ( $rows as $product_id => $quantity ) { $this->reserve_stock_for_product( $product_id, $quantity, $order, $minutes ); } } } catch ( ReserveStockException $e ) { $this->release_stock_for_order( $order ); throw $e; } // Add order note after successfully holding the stock. if ( ! empty( $held_stock_notes ) ) { $remaining_count = count( $rows ) - count( $held_stock_notes ); if ( $remaining_count > 0 ) { $held_stock_notes[] = sprintf( // translators: %d is the remaining order items count. _nx( '- ...and %d more item.', '- ... and %d more items.', $remaining_count, 'held stock note', 'woocommerce' ), $remaining_count ); } $order->add_order_note( sprintf( // translators: %1$s is a time in minutes, %2$s is a list of products and quantities. _x( 'Stock hold of %1$s minutes applied to: %2$s', 'held stock note', 'woocommerce' ), $minutes, '
' . implode( '
', $held_stock_notes ) ), false, false, array( 'note_group' => OrderNoteGroup::PRODUCT_STOCK, ) ); } } /** * Release a temporary hold on stock for an order. * * @param \WC_Order $order Order object. */ public function release_stock_for_order( $order ) { global $wpdb; if ( ! $this->is_enabled() ) { return; } $wpdb->delete( $wpdb->wc_reserved_stock, array( 'order_id' => $order->get_id(), ) ); } /** * Reserve stock for a product by inserting rows into the DB. * * @throws ReserveStockException If a row cannot be inserted. * * @param int $product_id Product ID which is having stock reserved. * @param int $stock_quantity Stock amount to reserve. * @param \WC_Order $order Order object which contains the product. * @param int $minutes How long to reserve stock in minutes. */ private function reserve_stock_for_product( $product_id, $stock_quantity, $order, $minutes ) { global $wpdb; $query_for_stock = \WC_Data_Store::load( 'product' )->get_query_for_stock( $product_id ); $query_for_reserved_stock = $this->get_query_for_reserved_stock( $product_id, $order->get_id() ); // Performance note: this method uses pessimistic locking and requires InnoDB table types to function correctly. // phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared $sql = $wpdb->prepare( " INSERT INTO {$wpdb->wc_reserved_stock} ( `order_id`, `product_id`, `stock_quantity`, `timestamp`, `expires` ) SELECT %d, %d, %d, NOW(), ( NOW() + INTERVAL %d MINUTE ) FROM DUAL WHERE ( $query_for_stock FOR UPDATE ) - ( $query_for_reserved_stock LOCK IN SHARE MODE ) >= %d ON DUPLICATE KEY UPDATE `expires` = VALUES( `expires` ), `stock_quantity` = VALUES( `stock_quantity` ) ", $order->get_id(), $product_id, $stock_quantity, $minutes, $stock_quantity ); // phpcs:enable WordPress.DB.PreparedSQL.InterpolatedNotPrepared // Retry operations in high-contention environments if error codes 1213, 1205, or 1020 occur. Since error // messages may be localized and we cannot reliably identify these codes, we use a generalized approach. Do // not remove this loop; it is required for the 'LOCK IN SHARE MODE' locking mode in the SQL above. for ( $attempt = 0; $attempt < 3; ++$attempt ) { $result = $wpdb->query( $sql ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared if ( false !== $result ) { break; } } if ( ! $result ) { $product = wc_get_product( $product_id ); throw new ReserveStockException( 'woocommerce_product_not_enough_stock', sprintf( /* translators: %s: product name */ __( 'Not enough units of %s are available in stock to fulfil this order.', 'woocommerce' ), $product ? $product->get_name() : '#' . $product_id ), 403 ); } } /** * Returns query statement for getting reserved stock of a product. * * @param int $product_id Product ID. * @param int $exclude_order_id Order to exclude from the results. * @return string Query statement. */ private function get_query_for_reserved_stock( $product_id, $exclude_order_id ): string { global $wpdb; $pending = OrderInternalStatus::PENDING; if ( OrderUtil::custom_orders_table_usage_is_enabled() ) { $join = "{$wpdb->prefix}wc_orders orders ON stock_table.`order_id` = orders.id"; $where_status = "orders.status IN ( 'wc-checkout-draft', '$pending' )"; } else { $join = "{$wpdb->posts} posts ON stock_table.`order_id` = posts.ID"; $where_status = "posts.post_status IN ( 'wc-checkout-draft', '$pending' )"; } // phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared $query = $wpdb->prepare( " SELECT COALESCE( SUM( stock_table.`stock_quantity` ), 0 ) FROM $wpdb->wc_reserved_stock stock_table LEFT JOIN $join WHERE $where_status AND stock_table.`expires` > NOW() AND stock_table.`product_id` = %d AND stock_table.`order_id` != %d ", $product_id, $exclude_order_id ); // phpcs:enable WordPress.DB.PreparedSQL.InterpolatedNotPrepared /** * Filter: woocommerce_query_for_reserved_stock * Allows to filter the query for getting reserved stock of a product. * * @since 4.5.0 * @param string $query The query for getting reserved stock of a product. * @param int $product_id Product ID. * @param int $exclude_order_id Order to exclude from the results. */ return apply_filters( 'woocommerce_query_for_reserved_stock', $query, $product_id, $exclude_order_id ); } }