372 lines
12 KiB
PHP
372 lines
12 KiB
PHP
<?php
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/**
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* WooCommerce Stock Functions
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*
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* Functions used to manage product stock levels.
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*
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* @package WooCommerce/Functions
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* @version 3.4.0
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*/
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defined( 'ABSPATH' ) || exit;
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/**
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* Update a product's stock amount.
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*
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* Uses queries rather than update_post_meta so we can do this in one query (to avoid stock issues).
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*
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* @since 3.0.0 this supports set, increase and decrease.
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*
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* @param int|WC_Product $product Product ID or product instance.
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* @param int|null $stock_quantity Stock quantity.
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* @param string $operation Type of opertion, allows 'set', 'increase' and 'decrease'.
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* @param bool $updating If true, the product object won't be saved here as it will be updated later.
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* @return bool|int|null
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*/
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function wc_update_product_stock( $product, $stock_quantity = null, $operation = 'set', $updating = false ) {
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if ( ! is_a( $product, 'WC_Product' ) ) {
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$product = wc_get_product( $product );
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}
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if ( ! $product ) {
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return false;
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}
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if ( ! is_null( $stock_quantity ) && $product->managing_stock() ) {
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// Some products (variations) can have their stock managed by their parent. Get the correct object to be updated here.
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$product_id_with_stock = $product->get_stock_managed_by_id();
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$product_with_stock = $product_id_with_stock !== $product->get_id() ? wc_get_product( $product_id_with_stock ) : $product;
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$data_store = WC_Data_Store::load( 'product' );
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// Update the database.
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$new_stock = $data_store->update_product_stock( $product_id_with_stock, $stock_quantity, $operation );
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// Update the product object.
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$data_store->read_stock_quantity( $product_with_stock, $new_stock );
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// If this is not being called during an update routine, save the product so stock status etc is in sync, and caches are cleared.
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if ( ! $updating ) {
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$product_with_stock->set_stock_status();
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$product_with_stock->save();
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}
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// Fire actions to let 3rd parties know the stock changed.
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if ( $product_with_stock->is_type( 'variation' ) ) {
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do_action( 'woocommerce_variation_set_stock', $product_with_stock );
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} else {
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do_action( 'woocommerce_product_set_stock', $product_with_stock );
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}
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return $product_with_stock->get_stock_quantity();
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}
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return $product->get_stock_quantity();
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}
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/**
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* Update a product's stock status.
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*
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* @param int $product_id Product ID.
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* @param int $status Status.
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*/
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function wc_update_product_stock_status( $product_id, $status ) {
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$product = wc_get_product( $product_id );
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if ( $product ) {
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$product->set_stock_status( $status );
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$product->save();
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}
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}
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/**
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* When a payment is complete, we can reduce stock levels for items within an order.
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*
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* @since 3.0.0
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* @param int $order_id Order ID.
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*/
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function wc_maybe_reduce_stock_levels( $order_id ) {
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$order = wc_get_order( $order_id );
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if ( ! $order ) {
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return;
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}
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$stock_reduced = $order->get_data_store()->get_stock_reduced( $order_id );
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$trigger_reduce = apply_filters( 'woocommerce_payment_complete_reduce_order_stock', ! $stock_reduced, $order_id );
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// Only continue if we're reducing stock.
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if ( ! $trigger_reduce ) {
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return;
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}
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wc_reduce_stock_levels( $order );
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// Ensure stock is marked as "reduced" in case payment complete or other stock actions are called.
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$order->get_data_store()->set_stock_reduced( $order_id, true );
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}
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add_action( 'woocommerce_payment_complete', 'wc_maybe_reduce_stock_levels' );
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add_action( 'woocommerce_order_status_completed', 'wc_maybe_reduce_stock_levels' );
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add_action( 'woocommerce_order_status_processing', 'wc_maybe_reduce_stock_levels' );
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add_action( 'woocommerce_order_status_on-hold', 'wc_maybe_reduce_stock_levels' );
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/**
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* When a payment is cancelled, restore stock.
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*
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* @since 3.0.0
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* @param int $order_id Order ID.
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*/
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function wc_maybe_increase_stock_levels( $order_id ) {
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$order = wc_get_order( $order_id );
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if ( ! $order ) {
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return;
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}
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$stock_reduced = $order->get_data_store()->get_stock_reduced( $order_id );
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$trigger_increase = (bool) $stock_reduced;
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// Only continue if we're increasing stock.
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if ( ! $trigger_increase ) {
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return;
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}
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wc_increase_stock_levels( $order );
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// Ensure stock is not marked as "reduced" anymore.
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$order->get_data_store()->set_stock_reduced( $order_id, false );
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}
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add_action( 'woocommerce_order_status_cancelled', 'wc_maybe_increase_stock_levels' );
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add_action( 'woocommerce_order_status_pending', 'wc_maybe_increase_stock_levels' );
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/**
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* Reduce stock levels for items within an order, if stock has not already been reduced for the items.
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*
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* @since 3.0.0
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* @param int|WC_Order $order_id Order ID or order instance.
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*/
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function wc_reduce_stock_levels( $order_id ) {
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if ( is_a( $order_id, 'WC_Order' ) ) {
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$order = $order_id;
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$order_id = $order->get_id();
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} else {
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$order = wc_get_order( $order_id );
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}
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// We need an order, and a store with stock management to continue.
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if ( ! $order || 'yes' !== get_option( 'woocommerce_manage_stock' ) || ! apply_filters( 'woocommerce_can_reduce_order_stock', true, $order ) ) {
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return;
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}
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$changes = array();
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// Loop over all items.
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foreach ( $order->get_items() as $item ) {
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if ( ! $item->is_type( 'line_item' ) ) {
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continue;
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}
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// Only reduce stock once for each item.
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$product = $item->get_product();
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$item_stock_reduced = $item->get_meta( '_reduced_stock', true );
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if ( $item_stock_reduced || ! $product || ! $product->managing_stock() ) {
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continue;
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}
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$qty = apply_filters( 'woocommerce_order_item_quantity', $item->get_quantity(), $order, $item );
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$item_name = $product->get_formatted_name();
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$new_stock = wc_update_product_stock( $product, $qty, 'decrease' );
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if ( is_wp_error( $new_stock ) ) {
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/* translators: %s item name. */
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$order->add_order_note( sprintf( __( 'Unable to reduce stock for item %s.', 'woocommerce' ), $item_name ) );
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continue;
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}
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$item->add_meta_data( '_reduced_stock', $qty, true );
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$item->save();
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$changes[] = array(
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'product' => $product,
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'from' => $new_stock + $qty,
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'to' => $new_stock,
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);
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}
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wc_trigger_stock_change_notifications( $order, $changes );
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do_action( 'woocommerce_reduce_order_stock', $order );
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}
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/**
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* After stock change events, triggers emails and adds order notes.
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*
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* @since 3.5.0
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* @param WC_Order $order order object.
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* @param array $changes Array of changes.
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*/
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function wc_trigger_stock_change_notifications( $order, $changes ) {
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if ( empty( $changes ) ) {
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return;
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}
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$order_notes = array();
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$no_stock_amount = absint( get_option( 'woocommerce_notify_no_stock_amount', 0 ) );
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foreach ( $changes as $change ) {
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$order_notes[] = $change['product']->get_formatted_name() . ' ' . $change['from'] . '→' . $change['to'];
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$low_stock_amount = absint( wc_get_low_stock_amount( wc_get_product( $change['product']->get_id() ) ) );
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if ( $change['to'] <= $no_stock_amount ) {
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do_action( 'woocommerce_no_stock', wc_get_product( $change['product']->get_id() ) );
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} elseif ( $change['to'] <= $low_stock_amount ) {
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do_action( 'woocommerce_low_stock', wc_get_product( $change['product']->get_id() ) );
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}
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if ( $change['to'] < 0 ) {
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do_action(
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'woocommerce_product_on_backorder',
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array(
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'product' => wc_get_product( $change['product']->get_id() ),
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'order_id' => $order->get_id(),
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'quantity' => abs( $change['from'] - $change['to'] ),
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)
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);
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}
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}
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$order->add_order_note( __( 'Stock levels reduced:', 'woocommerce' ) . ' ' . implode( ', ', $order_notes ) );
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}
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/**
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* Increase stock levels for items within an order.
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*
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* @since 3.0.0
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* @param int|WC_Order $order_id Order ID or order instance.
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*/
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function wc_increase_stock_levels( $order_id ) {
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if ( is_a( $order_id, 'WC_Order' ) ) {
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$order = $order_id;
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$order_id = $order->get_id();
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} else {
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$order = wc_get_order( $order_id );
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}
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// We need an order, and a store with stock management to continue.
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if ( ! $order || 'yes' !== get_option( 'woocommerce_manage_stock' ) || ! apply_filters( 'woocommerce_can_restore_order_stock', true, $order ) ) {
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return;
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}
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$changes = array();
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// Loop over all items.
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foreach ( $order->get_items() as $item ) {
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if ( ! $item->is_type( 'line_item' ) ) {
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continue;
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}
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// Only increase stock once for each item.
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$product = $item->get_product();
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$item_stock_reduced = $item->get_meta( '_reduced_stock', true );
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if ( ! $item_stock_reduced || ! $product || ! $product->managing_stock() ) {
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continue;
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}
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$item_name = $product->get_formatted_name();
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$new_stock = wc_update_product_stock( $product, $item_stock_reduced, 'increase' );
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if ( is_wp_error( $new_stock ) ) {
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/* translators: %s item name. */
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$order->add_order_note( sprintf( __( 'Unable to restore stock for item %s.', 'woocommerce' ), $item_name ) );
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continue;
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}
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$item->delete_meta_data( '_reduced_stock' );
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$item->save();
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$changes[] = $item_name . ' ' . ( $new_stock - $item_stock_reduced ) . '→' . $new_stock;
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}
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if ( $changes ) {
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$order->add_order_note( __( 'Stock levels increased:', 'woocommerce' ) . ' ' . implode( ', ', $changes ) );
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}
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do_action( 'woocommerce_restore_order_stock', $order );
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}
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/**
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* See how much stock is being held in pending orders.
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*
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* @since 3.5.0
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* @param WC_Product $product Product to check.
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* @param integer $exclude_order_id Order ID to exclude.
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* @return int
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*/
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function wc_get_held_stock_quantity( $product, $exclude_order_id = 0 ) {
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global $wpdb;
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/**
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* Filter: woocommerce_hold_stock_for_checkout
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* Allows enable/disable hold stock functionality on checkout.
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*
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* @since 3.9.0
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* @param bool $enabled Default to true.
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*/
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if ( apply_filters( 'woocommerce_hold_stock_for_checkout', true ) ) {
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/**
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* DOES NOT SUPPORT `exclude_order_id` param, which was primarily being used to exclude the current order!
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* While creating an order during checkout flow, this logic relies on the fact that order is not yet saved and therefore will be excluded.
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*
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* Query for calculating held stock which uses '_held_for_checkout' records instead of actually querying all orders with wc-pending status.
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* This is introduced to handle race conditions.
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*
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* @since 3.9.0
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*/
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$product_data_store = WC_Data_Store::load( 'product' );
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$product_id = $product->get_stock_managed_by_id();
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return $wpdb->get_var( $product_data_store->get_query_for_held_stock( $product_id ) ); // phpcs:ignore WordPress.DB.PreparedSQL.NotPrepared
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}
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return $wpdb->get_var(
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// phpcs:disable WordPress.DB.PreparedSQL.NotPrepared
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$wpdb->prepare(
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"
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SELECT SUM( order_item_meta.meta_value ) AS held_qty
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FROM {$wpdb->posts} AS posts
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LEFT JOIN {$wpdb->postmeta} as postmeta ON posts.ID = postmeta.post_id
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LEFT JOIN {$wpdb->prefix}woocommerce_order_items as order_items ON posts.ID = order_items.order_id
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LEFT JOIN {$wpdb->prefix}woocommerce_order_itemmeta as order_item_meta ON order_items.order_item_id = order_item_meta.order_item_id
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LEFT JOIN {$wpdb->prefix}woocommerce_order_itemmeta as order_item_meta2 ON order_items.order_item_id = order_item_meta2.order_item_id
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WHERE order_item_meta.meta_key = '_qty'
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AND order_item_meta2.meta_key = %s
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AND order_item_meta2.meta_value = %d
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AND postmeta.meta_key = '_created_via'
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AND postmeta.meta_value = 'checkout'
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AND posts.post_type IN ( '" . implode( "','", wc_get_order_types() ) . "' )
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AND posts.post_status = 'wc-pending'
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AND posts.ID != %d;
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",
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'product_variation' === get_post_type( $product->get_stock_managed_by_id() ) ? '_variation_id' : '_product_id',
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$product->get_stock_managed_by_id(),
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$exclude_order_id
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)
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// phpcs:enable WordPress.DB.PreparedSQL.NotPrepared
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);
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}
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/**
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* Return low stock amount to determine if notification needs to be sent
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*
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* @param WC_Product $product Product to get data from.
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* @since 3.5.0
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* @return int
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*/
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function wc_get_low_stock_amount( WC_Product $product ) {
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if ( $product->is_type( 'variation' ) ) {
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$product = wc_get_product( $product->get_parent_id() );
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}
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$low_stock_amount = $product->get_low_stock_amount();
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if ( '' === $low_stock_amount ) {
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$low_stock_amount = get_option( 'woocommerce_notify_low_stock_amount', 2 );
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}
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return $low_stock_amount;
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}
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