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<?php
/**
* WooCommerce Stock Functions
*
* Functions used to manage product stock levels.
*
* @package WooCommerce\Functions
* @version 3.4.0
*/
defined( 'ABSPATH' ) || exit;
/**
* Update a product's stock amount.
*
* Uses queries rather than update_post_meta so we can do this in one query (to avoid stock issues).
*
* @since 3.0.0 this supports set, increase and decrease.
*
* @param int|WC_Product $product Product ID or product instance.
* @param int|null $stock_quantity Stock quantity.
* @param string $operation Type of opertion, allows 'set', 'increase' and 'decrease'.
* @param bool $updating If true, the product object won't be saved here as it will be updated later.
* @return bool|int|null
*/
function wc_update_product_stock( $product, $stock_quantity = null, $operation = 'set', $updating = false ) {
if ( ! is_a( $product, 'WC_Product' ) ) {
$product = wc_get_product( $product );
}
if ( ! $product ) {
return false;
}
if ( ! is_null( $stock_quantity ) && $product->managing_stock() ) {
// Some products (variations) can have their stock managed by their parent. Get the correct object to be updated here.
$product_id_with_stock = $product->get_stock_managed_by_id();
$product_with_stock = $product_id_with_stock !== $product->get_id() ? wc_get_product( $product_id_with_stock ) : $product;
$data_store = WC_Data_Store::load( 'product' );
// Update the database.
$new_stock = $data_store->update_product_stock( $product_id_with_stock, $stock_quantity, $operation );
// Update the product object.
$data_store->read_stock_quantity( $product_with_stock, $new_stock );
// If this is not being called during an update routine, save the product so stock status etc is in sync, and caches are cleared.
if ( ! $updating ) {
$product_with_stock->save();
}
// Fire actions to let 3rd parties know the stock changed.
if ( $product_with_stock->is_type( 'variation' ) ) {
do_action( 'woocommerce_variation_set_stock', $product_with_stock );
} else {
do_action( 'woocommerce_product_set_stock', $product_with_stock );
}
return $product_with_stock->get_stock_quantity();
}
return $product->get_stock_quantity();
}
/**
* Update a product's stock status.
*
* @param int $product_id Product ID.
* @param string $status Status.
*/
function wc_update_product_stock_status( $product_id, $status ) {
$product = wc_get_product( $product_id );
if ( $product ) {
$product->set_stock_status( $status );
$product->save();
}
}
/**
* When a payment is complete, we can reduce stock levels for items within an order.
*
* @since 3.0.0
* @param int $order_id Order ID.
*/
function wc_maybe_reduce_stock_levels( $order_id ) {
$order = wc_get_order( $order_id );
if ( ! $order ) {
return;
}
$stock_reduced = $order->get_data_store()->get_stock_reduced( $order_id );
$trigger_reduce = apply_filters( 'woocommerce_payment_complete_reduce_order_stock', ! $stock_reduced, $order_id );
// Only continue if we're reducing stock.
if ( ! $trigger_reduce ) {
return;
}
wc_reduce_stock_levels( $order );
// Ensure stock is marked as "reduced" in case payment complete or other stock actions are called.
$order->get_data_store()->set_stock_reduced( $order_id, true );
}
add_action( 'woocommerce_payment_complete', 'wc_maybe_reduce_stock_levels' );
add_action( 'woocommerce_order_status_completed', 'wc_maybe_reduce_stock_levels' );
add_action( 'woocommerce_order_status_processing', 'wc_maybe_reduce_stock_levels' );
add_action( 'woocommerce_order_status_on-hold', 'wc_maybe_reduce_stock_levels' );
/**
* When a payment is cancelled, restore stock.
*
* @since 3.0.0
* @param int $order_id Order ID.
*/
function wc_maybe_increase_stock_levels( $order_id ) {
$order = wc_get_order( $order_id );
if ( ! $order ) {
return;
}
$stock_reduced = $order->get_data_store()->get_stock_reduced( $order_id );
$trigger_increase = (bool) $stock_reduced;
// Only continue if we're increasing stock.
if ( ! $trigger_increase ) {
return;
}
wc_increase_stock_levels( $order );
// Ensure stock is not marked as "reduced" anymore.
$order->get_data_store()->set_stock_reduced( $order_id, false );
}
add_action( 'woocommerce_order_status_cancelled', 'wc_maybe_increase_stock_levels' );
add_action( 'woocommerce_order_status_pending', 'wc_maybe_increase_stock_levels' );
/**
* Reduce stock levels for items within an order, if stock has not already been reduced for the items.
*
* @since 3.0.0
* @param int|WC_Order $order_id Order ID or order instance.
*/
function wc_reduce_stock_levels( $order_id ) {
if ( is_a( $order_id, 'WC_Order' ) ) {
$order = $order_id;
$order_id = $order->get_id();
} else {
$order = wc_get_order( $order_id );
}
// We need an order, and a store with stock management to continue.
if ( ! $order || 'yes' !== get_option( 'woocommerce_manage_stock' ) || ! apply_filters( 'woocommerce_can_reduce_order_stock', true, $order ) ) {
return;
}
$changes = array();
// Loop over all items.
foreach ( $order->get_items() as $item ) {
if ( ! $item->is_type( 'line_item' ) ) {
continue;
}
// Only reduce stock once for each item.
$product = $item->get_product();
$item_stock_reduced = $item->get_meta( '_reduced_stock', true );
if ( $item_stock_reduced || ! $product || ! $product->managing_stock() ) {
continue;
}
/**
* Filter order item quantity.
*
* @param int|float $quantity Quantity.
* @param WC_Order $order Order data.
* @param WC_Order_Item_Product $item Order item data.
*/
$qty = apply_filters( 'woocommerce_order_item_quantity', $item->get_quantity(), $order, $item );
$item_name = $product->get_formatted_name();
$new_stock = wc_update_product_stock( $product, $qty, 'decrease' );
if ( is_wp_error( $new_stock ) ) {
/* translators: %s item name. */
$order->add_order_note( sprintf( __( 'Unable to reduce stock for item %s.', 'woocommerce' ), $item_name ) );
continue;
}
$item->add_meta_data( '_reduced_stock', $qty, true );
$item->save();
$changes[] = array(
'product' => $product,
'from' => $new_stock + $qty,
'to' => $new_stock,
);
}
wc_trigger_stock_change_notifications( $order, $changes );
do_action( 'woocommerce_reduce_order_stock', $order );
}
/**
* After stock change events, triggers emails and adds order notes.
*
* @since 3.5.0
* @param WC_Order $order order object.
* @param array $changes Array of changes.
*/
function wc_trigger_stock_change_notifications( $order, $changes ) {
if ( empty( $changes ) ) {
return;
}
$order_notes = array();
$no_stock_amount = absint( get_option( 'woocommerce_notify_no_stock_amount', 0 ) );
foreach ( $changes as $change ) {
$order_notes[] = $change['product']->get_formatted_name() . ' ' . $change['from'] . '→' . $change['to'];
$low_stock_amount = absint( wc_get_low_stock_amount( wc_get_product( $change['product']->get_id() ) ) );
if ( $change['to'] <= $no_stock_amount ) {
do_action( 'woocommerce_no_stock', wc_get_product( $change['product']->get_id() ) );
} elseif ( $change['to'] <= $low_stock_amount ) {
do_action( 'woocommerce_low_stock', wc_get_product( $change['product']->get_id() ) );
}
if ( $change['to'] < 0 ) {
do_action(
'woocommerce_product_on_backorder',
array(
'product' => wc_get_product( $change['product']->get_id() ),
'order_id' => $order->get_id(),
'quantity' => abs( $change['from'] - $change['to'] ),
)
);
}
}
$order->add_order_note( __( 'Stock levels reduced:', 'woocommerce' ) . ' ' . implode( ', ', $order_notes ) );
}
/**
* Increase stock levels for items within an order.
*
* @since 3.0.0
* @param int|WC_Order $order_id Order ID or order instance.
*/
function wc_increase_stock_levels( $order_id ) {
if ( is_a( $order_id, 'WC_Order' ) ) {
$order = $order_id;
$order_id = $order->get_id();
} else {
$order = wc_get_order( $order_id );
}
// We need an order, and a store with stock management to continue.
if ( ! $order || 'yes' !== get_option( 'woocommerce_manage_stock' ) || ! apply_filters( 'woocommerce_can_restore_order_stock', true, $order ) ) {
return;
}
$changes = array();
// Loop over all items.
foreach ( $order->get_items() as $item ) {
if ( ! $item->is_type( 'line_item' ) ) {
continue;
}
// Only increase stock once for each item.
$product = $item->get_product();
$item_stock_reduced = $item->get_meta( '_reduced_stock', true );
if ( ! $item_stock_reduced || ! $product || ! $product->managing_stock() ) {
continue;
}
$item_name = $product->get_formatted_name();
$new_stock = wc_update_product_stock( $product, $item_stock_reduced, 'increase' );
if ( is_wp_error( $new_stock ) ) {
/* translators: %s item name. */
$order->add_order_note( sprintf( __( 'Unable to restore stock for item %s.', 'woocommerce' ), $item_name ) );
continue;
}
$item->delete_meta_data( '_reduced_stock' );
$item->save();
$changes[] = $item_name . ' ' . ( $new_stock - $item_stock_reduced ) . '→' . $new_stock;
}
if ( $changes ) {
$order->add_order_note( __( 'Stock levels increased:', 'woocommerce' ) . ' ' . implode( ', ', $changes ) );
}
do_action( 'woocommerce_restore_order_stock', $order );
}
/**
* See how much stock is being held in pending orders.
*
* @since 3.5.0
* @param WC_Product $product Product to check.
* @param integer $exclude_order_id Order ID to exclude.
* @return int
*/
function wc_get_held_stock_quantity( WC_Product $product, $exclude_order_id = 0 ) {
/**
* Filter: woocommerce_hold_stock_for_checkout
* Allows enable/disable hold stock functionality on checkout.
*
* @since 4.3.0
* @param bool $enabled Default to true if managing stock globally.
*/
if ( ! apply_filters( 'woocommerce_hold_stock_for_checkout', wc_string_to_bool( get_option( 'woocommerce_manage_stock', 'yes' ) ) ) ) {
return 0;
}
return ( new \Automattic\WooCommerce\Checkout\Helpers\ReserveStock() )->get_reserved_stock( $product, $exclude_order_id );
}
/**
* Hold stock for an order.
*
* @throws ReserveStockException If reserve stock fails.
*
* @since 4.1.0
* @param \WC_Order|int $order Order ID or instance.
*/
function wc_reserve_stock_for_order( $order ) {
/**
* Filter: woocommerce_hold_stock_for_checkout
* Allows enable/disable hold stock functionality on checkout.
*
* @since @since 4.1.0
* @param bool $enabled Default to true if managing stock globally.
*/
if ( ! apply_filters( 'woocommerce_hold_stock_for_checkout', wc_string_to_bool( get_option( 'woocommerce_manage_stock', 'yes' ) ) ) ) {
return;
}
$order = $order instanceof WC_Order ? $order : wc_get_order( $order );
if ( $order ) {
( new \Automattic\WooCommerce\Checkout\Helpers\ReserveStock() )->reserve_stock_for_order( $order );
}
}
add_action( 'woocommerce_checkout_order_created', 'wc_reserve_stock_for_order' );
/**
* Release held stock for an order.
*
* @since 4.3.0
* @param \WC_Order|int $order Order ID or instance.
*/
function wc_release_stock_for_order( $order ) {
/**
* Filter: woocommerce_hold_stock_for_checkout
* Allows enable/disable hold stock functionality on checkout.
*
* @since 4.3.0
* @param bool $enabled Default to true if managing stock globally.
*/
if ( ! apply_filters( 'woocommerce_hold_stock_for_checkout', wc_string_to_bool( get_option( 'woocommerce_manage_stock', 'yes' ) ) ) ) {
return;
}
$order = $order instanceof WC_Order ? $order : wc_get_order( $order );
if ( $order ) {
( new \Automattic\WooCommerce\Checkout\Helpers\ReserveStock() )->release_stock_for_order( $order );
}
}
add_action( 'woocommerce_checkout_order_exception', 'wc_release_stock_for_order' );
add_action( 'woocommerce_payment_complete', 'wc_release_stock_for_order', 11 );
add_action( 'woocommerce_order_status_cancelled', 'wc_release_stock_for_order', 11 );
add_action( 'woocommerce_order_status_completed', 'wc_release_stock_for_order', 11 );
add_action( 'woocommerce_order_status_processing', 'wc_release_stock_for_order', 11 );
add_action( 'woocommerce_order_status_on-hold', 'wc_release_stock_for_order', 11 );
/**
* Return low stock amount to determine if notification needs to be sent
*
* @param WC_Product $product Product to get data from.
* @since 3.5.0
* @return int
*/
function wc_get_low_stock_amount( WC_Product $product ) {
if ( $product->is_type( 'variation' ) ) {
$product = wc_get_product( $product->get_parent_id() );
}
$low_stock_amount = $product->get_low_stock_amount();
if ( '' === $low_stock_amount ) {
$low_stock_amount = get_option( 'woocommerce_notify_low_stock_amount', 2 );
}
return $low_stock_amount;
}