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<?php /** * Handle product stock reservation during checkout. / namespace Automattic\WooCommerce\Checkout\Helpers; use Automattic\WooCommerce\Enums\OrderInternalStatus; use Automattic\WooCommerce\Utilities\OrderUtil; defined( 'ABSPATH' ) \|\| exit; /* * Stock Reservation class. / final class ReserveStock { /* * Is stock reservation enabled? * * @var boolean / private $enabled = true; /* * Constructor / public function __construct() { // Table needed for this feature are added in 4.3. $this->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 integer $exclude_order_id Optional order to exclude from the results. * * @return integer Amount of stock already reserved. / public function get_reserved_stock( $product, $exclude_order_id = 0 ) { global $wpdb; if ( ! $this->is_enabled() ) { return 0; } // phpcs:ignore WordPress.DB.PreparedSQL.InterpolatedNotPrepared, WordPress.DB.PreparedSQL.NotPrepared return (int) $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 woocommerce_hold_stock_minutes. / public function reserve_stock_for_order( $order, $minutes = 0 ) { $minutes = $minutes ? $minutes : (int) get_option( 'woocommerce_hold_stock_minutes', 60 ); /* * 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. Defaults to woocommerce_hold_stock_minutes or 10 if block checkout entry. * @param \WC_Order $order Order object. / $minutes = (int) apply_filters( 'woocommerce_order_hold_stock_minutes', $minutes, $order ); if ( ! $minutes \|\| ! $this->is_enabled() ) { return; } $held_stock_notes = array(); try { $items = array_filter( $order->get_items(), function ( $item ) { return $item->is_type( 'line_item' ) && $item->get_product() instanceof \WC_Product && $item->get_quantity() > 0; } ); $rows = array(); foreach ( $items as $item ) { $product = $item->get_product(); 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. * * @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 ] = isset( $rows[ $managed_by_id ] ) ? $rows[ $managed_by_id ] + $item_quantity : $item_quantity; 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 ) ) { 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, '<br>' . implode( '<br>', $held_stock_notes ) ) ); } } /* * 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; $product_data_store = \WC_Data_Store::load( 'product' ); $query_for_stock = $product_data_store->get_query_for_stock( $product_id ); $query_for_reserved_stock = $this->get_query_for_reserved_stock( $product_id, $order->get_id() ); // phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared, WordPress.DB.PreparedSQL.NotPrepared $result = $wpdb->query( $wpdb->prepare( " INSERT INTO {$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 FOR UPDATE ) >= %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, WordPress.DB.PreparedSQL.NotPrepared 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 integer $exclude_order_id Optional order to exclude from the results. * @return string\|void Query statement. / private function get_query_for_reserved_stock( $product_id, $exclude_order_id = 0 ) { global $wpdb; $join = "$wpdb->posts posts ON stock_table.`order_id` = posts.ID"; $where_status = "posts.post_status IN ( 'wc-checkout-draft', '" . 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', '" . OrderInternalStatus::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 ); } }