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<?php
/**
* Discount calculation
*
* @package WooCommerce\Classes
* @since 3.2.0
*/
use Automattic\WooCommerce\Utilities\NumberUtil;
defined( 'ABSPATH' ) || exit;
/**
* Discounts class.
*/
class WC_Discounts {
/**
* Reference to cart or order object.
*
* @since 3.2.0
* @var WC_Cart|WC_Order
*/
protected $object;
/**
* An array of items to discount.
*
* @var array
*/
protected $items = array();
/**
* An array of discounts which have been applied to items.
*
* @var array[] Code => Item Key => Value
*/
protected $discounts = array();
/**
* WC_Discounts Constructor.
*
* @param WC_Cart|WC_Order $object Cart or order object.
*/
public function __construct( $object = null ) {
if ( is_a( $object, 'WC_Cart' ) ) {
$this->set_items_from_cart( $object );
} elseif ( is_a( $object, 'WC_Order' ) ) {
$this->set_items_from_order( $object );
}
}
/**
* Set items directly. Used by WC_Cart_Totals.
*
* @since 3.2.3
* @param array $items Items to set.
*/
public function set_items( $items ) {
$this->items = $items;
$this->discounts = array();
uasort( $this->items, array( $this, 'sort_by_price' ) );
}
/**
* Normalise cart items which will be discounted.
*
* @since 3.2.0
* @param WC_Cart $cart Cart object.
*/
public function set_items_from_cart( $cart ) {
$this->items = array();
$this->discounts = array();
if ( ! is_a( $cart, 'WC_Cart' ) ) {
return;
}
$this->object = $cart;
foreach ( $cart->get_cart() as $key => $cart_item ) {
$item = new stdClass();
$item->key = $key;
$item->object = $cart_item;
$item->product = $cart_item['data'];
$item->quantity = $cart_item['quantity'];
$item->price = wc_add_number_precision_deep( (float) $item->product->get_price() * (float) $item->quantity );
$this->items[ $key ] = $item;
}
uasort( $this->items, array( $this, 'sort_by_price' ) );
}
/**
* Normalise order items which will be discounted.
*
* @since 3.2.0
* @param WC_Order $order Order object.
*/
public function set_items_from_order( $order ) {
$this->items = array();
$this->discounts = array();
if ( ! is_a( $order, 'WC_Order' ) ) {
return;
}
$this->object = $order;
foreach ( $order->get_items() as $order_item ) {
$item = new stdClass();
$item->key = $order_item->get_id();
$item->object = $order_item;
$item->product = $order_item->get_product();
$item->quantity = $order_item->get_quantity();
$item->price = wc_add_number_precision_deep( $order_item->get_subtotal() );
if ( $order->get_prices_include_tax() ) {
$item->price += wc_add_number_precision_deep( $order_item->get_subtotal_tax() );
}
$this->items[ $order_item->get_id() ] = $item;
}
uasort( $this->items, array( $this, 'sort_by_price' ) );
}
/**
* Get the object concerned.
*
* @since 3.3.2
* @return object
*/
public function get_object() {
return $this->object;
}
/**
* Get items.
*
* @since 3.2.0
* @return object[]
*/
public function get_items() {
return $this->items;
}
/**
* Get items to validate.
*
* @since 3.3.2
* @return object[]
*/
public function get_items_to_validate() {
return apply_filters( 'woocommerce_coupon_get_items_to_validate', $this->get_items(), $this );
}
/**
* Get discount by key with or without precision.
*
* @since 3.2.0
* @param string $key name of discount row to return.
* @param bool $in_cents Should the totals be returned in cents, or without precision.
* @return float
*/
public function get_discount( $key, $in_cents = false ) {
$item_discount_totals = $this->get_discounts_by_item( $in_cents );
return isset( $item_discount_totals[ $key ] ) ? $item_discount_totals[ $key ] : 0;
}
/**
* Get all discount totals.
*
* @since 3.2.0
* @param bool $in_cents Should the totals be returned in cents, or without precision.
* @return array
*/
public function get_discounts( $in_cents = false ) {
$discounts = $this->discounts;
return $in_cents ? $discounts : wc_remove_number_precision_deep( $discounts );
}
/**
* Get all discount totals per item.
*
* @since 3.2.0
* @param bool $in_cents Should the totals be returned in cents, or without precision.
* @return array
*/
public function get_discounts_by_item( $in_cents = false ) {
$discounts = $this->discounts;
$item_discount_totals = (array) array_shift( $discounts );
foreach ( $discounts as $item_discounts ) {
foreach ( $item_discounts as $item_key => $item_discount ) {
$item_discount_totals[ $item_key ] += $item_discount;
}
}
return $in_cents ? $item_discount_totals : wc_remove_number_precision_deep( $item_discount_totals );
}
/**
* Get all discount totals per coupon.
*
* @since 3.2.0
* @param bool $in_cents Should the totals be returned in cents, or without precision.
* @return array
*/
public function get_discounts_by_coupon( $in_cents = false ) {
$coupon_discount_totals = array_map( 'array_sum', $this->discounts );
return $in_cents ? $coupon_discount_totals : wc_remove_number_precision_deep( $coupon_discount_totals );
}
/**
* Get discounted price of an item without precision.
*
* @since 3.2.0
* @param object $item Get data for this item.
* @return float
*/
public function get_discounted_price( $item ) {
return wc_remove_number_precision_deep( $this->get_discounted_price_in_cents( $item ) );
}
/**
* Get discounted price of an item to precision (in cents).
*
* @since 3.2.0
* @param object $item Get data for this item.
* @return int
*/
public function get_discounted_price_in_cents( $item ) {
return absint( NumberUtil::round( $item->price - $this->get_discount( $item->key, true ) ) );
}
/**
* Apply a discount to all items using a coupon.
*
* @since 3.2.0
* @param WC_Coupon $coupon Coupon object being applied to the items.
* @param bool $validate Set to false to skip coupon validation.
* @throws Exception Error message when coupon isn't valid.
* @return bool|WP_Error True if applied or WP_Error instance in failure.
*/
public function apply_coupon( $coupon, $validate = true ) {
if ( ! is_a( $coupon, 'WC_Coupon' ) ) {
return new WP_Error( 'invalid_coupon', __( 'Invalid coupon', 'woocommerce' ) );
}
$is_coupon_valid = $validate ? $this->is_coupon_valid( $coupon ) : true;
if ( is_wp_error( $is_coupon_valid ) ) {
return $is_coupon_valid;
}
$coupon_code = $coupon->get_code();
if ( ! isset( $this->discounts[ $coupon_code ] ) || ! is_array( $this->discounts[ $coupon_code ] ) ) {
$this->discounts[ $coupon_code ] = array_fill_keys( array_keys( $this->items ), 0 );
}
$items_to_apply = $this->get_items_to_apply_coupon( $coupon );
// Core discounts are handled here as of 3.2.
switch ( $coupon->get_discount_type() ) {
case 'percent':
$this->apply_coupon_percent( $coupon, $items_to_apply );
break;
case 'fixed_product':
$this->apply_coupon_fixed_product( $coupon, $items_to_apply );
break;
case 'fixed_cart':
$this->apply_coupon_fixed_cart( $coupon, $items_to_apply );
break;
default:
$this->apply_coupon_custom( $coupon, $items_to_apply );
break;
}
return true;
}
/**
* Sort by price.
*
* @since 3.2.0
* @param array $a First element.
* @param array $b Second element.
* @return int
*/
protected function sort_by_price( $a, $b ) {
$price_1 = $a->price * $a->quantity;
$price_2 = $b->price * $b->quantity;
if ( $price_1 === $price_2 ) {
return 0;
}
return ( $price_1 < $price_2 ) ? 1 : -1;
}
/**
* Filter out all products which have been fully discounted to 0.
* Used as array_filter callback.
*
* @since 3.2.0
* @param object $item Get data for this item.
* @return bool
*/
protected function filter_products_with_price( $item ) {
return $this->get_discounted_price_in_cents( $item ) > 0;
}
/**
* Get items which the coupon should be applied to.
*
* @since 3.2.0
* @param object $coupon Coupon object.
* @return array
*/
protected function get_items_to_apply_coupon( $coupon ) {
$items_to_apply = array();
foreach ( $this->get_items_to_validate() as $item ) {
$item_to_apply = clone $item; // Clone the item so changes to this item do not affect the originals.
if ( 0 === $this->get_discounted_price_in_cents( $item_to_apply ) || 0 >= $item_to_apply->quantity ) {
continue;
}
if ( ! $coupon->is_valid_for_product( $item_to_apply->product, $item_to_apply->object ) && ! $coupon->is_valid_for_cart() ) {
continue;
}
$items_to_apply[] = $item_to_apply;
}
return $items_to_apply;
}
/**
* Apply percent discount to items and return an array of discounts granted.
*
* @since 3.2.0
* @param WC_Coupon $coupon Coupon object. Passed through filters.
* @param array $items_to_apply Array of items to apply the coupon to.
* @return int Total discounted.
*/
protected function apply_coupon_percent( $coupon, $items_to_apply ) {
$total_discount = 0;
$cart_total = 0;
$limit_usage_qty = 0;
$applied_count = 0;
$adjust_final_discount = true;
if ( null !== $coupon->get_limit_usage_to_x_items() ) {
$limit_usage_qty = $coupon->get_limit_usage_to_x_items();
}
$coupon_amount = $coupon->get_amount();
foreach ( $items_to_apply as $item ) {
// Find out how much price is available to discount for the item.
$discounted_price = $this->get_discounted_price_in_cents( $item );
// Get the price we actually want to discount, based on settings.
$price_to_discount = ( 'yes' === get_option( 'woocommerce_calc_discounts_sequentially', 'no' ) ) ? $discounted_price : NumberUtil::round( $item->price );
// See how many and what price to apply to.
$apply_quantity = $limit_usage_qty && ( $limit_usage_qty - $applied_count ) < $item->quantity ? $limit_usage_qty - $applied_count : $item->quantity;
$apply_quantity = max( 0, apply_filters( 'woocommerce_coupon_get_apply_quantity', $apply_quantity, $item, $coupon, $this ) );
$price_to_discount = ( $price_to_discount / $item->quantity ) * $apply_quantity;
// Run coupon calculations.
$discount = floor( $price_to_discount * ( $coupon_amount / 100 ) );
if ( is_a( $this->object, 'WC_Cart' ) && has_filter( 'woocommerce_coupon_get_discount_amount' ) ) {
// Send through the legacy filter, but not as cents.
$filtered_discount = wc_add_number_precision( apply_filters( 'woocommerce_coupon_get_discount_amount', wc_remove_number_precision( $discount ), wc_remove_number_precision( $price_to_discount ), $item->object, false, $coupon ) );
if ( $filtered_discount !== $discount ) {
$discount = $filtered_discount;
$adjust_final_discount = false;
}
}
$discount = wc_round_discount( min( $discounted_price, $discount ), 0 );
$cart_total = $cart_total + $price_to_discount;
$total_discount = $total_discount + $discount;
$applied_count = $applied_count + $apply_quantity;
// Store code and discount amount per item.
$this->discounts[ $coupon->get_code() ][ $item->key ] += $discount;
}
// Work out how much discount would have been given to the cart as a whole and compare to what was discounted on all line items.
$cart_total_discount = wc_round_discount( $cart_total * ( $coupon_amount / 100 ), 0 );
if ( $total_discount < $cart_total_discount && $adjust_final_discount ) {
$total_discount += $this->apply_coupon_remainder( $coupon, $items_to_apply, $cart_total_discount - $total_discount );
}
return $total_discount;
}
/**
* Apply fixed product discount to items.
*
* @since 3.2.0
* @param WC_Coupon $coupon Coupon object. Passed through filters.
* @param array $items_to_apply Array of items to apply the coupon to.
* @param int $amount Fixed discount amount to apply in cents. Leave blank to pull from coupon.
* @return int Total discounted.
*/
protected function apply_coupon_fixed_product( $coupon, $items_to_apply, $amount = null ) {
$total_discount = 0;
$amount = $amount ? $amount : wc_add_number_precision( $coupon->get_amount() );
$limit_usage_qty = 0;
$applied_count = 0;
if ( null !== $coupon->get_limit_usage_to_x_items() ) {
$limit_usage_qty = $coupon->get_limit_usage_to_x_items();
}
foreach ( $items_to_apply as $item ) {
// Find out how much price is available to discount for the item.
$discounted_price = $this->get_discounted_price_in_cents( $item );
// Get the price we actually want to discount, based on settings.
$price_to_discount = ( 'yes' === get_option( 'woocommerce_calc_discounts_sequentially', 'no' ) ) ? $discounted_price : $item->price;
// Run coupon calculations.
if ( $limit_usage_qty ) {
$apply_quantity = $limit_usage_qty - $applied_count < $item->quantity ? $limit_usage_qty - $applied_count : $item->quantity;
$apply_quantity = max( 0, apply_filters( 'woocommerce_coupon_get_apply_quantity', $apply_quantity, $item, $coupon, $this ) );
$discount = min( $amount, $item->price / $item->quantity ) * $apply_quantity;
} else {
$apply_quantity = apply_filters( 'woocommerce_coupon_get_apply_quantity', $item->quantity, $item, $coupon, $this );
$discount = $amount * $apply_quantity;
}
if ( is_a( $this->object, 'WC_Cart' ) && has_filter( 'woocommerce_coupon_get_discount_amount' ) ) {
// Send through the legacy filter, but not as cents.
$discount = wc_add_number_precision( apply_filters( 'woocommerce_coupon_get_discount_amount', wc_remove_number_precision( $discount ), wc_remove_number_precision( $price_to_discount ), $item->object, false, $coupon ) );
}
$discount = min( $discounted_price, $discount );
$total_discount = $total_discount + $discount;
$applied_count = $applied_count + $apply_quantity;
// Store code and discount amount per item.
$this->discounts[ $coupon->get_code() ][ $item->key ] += $discount;
}
return $total_discount;
}
/**
* Apply fixed cart discount to items.
*
* @since 3.2.0
* @param WC_Coupon $coupon Coupon object. Passed through filters.
* @param array $items_to_apply Array of items to apply the coupon to.
* @param int $amount Fixed discount amount to apply in cents. Leave blank to pull from coupon.
* @return int Total discounted.
*/
protected function apply_coupon_fixed_cart( $coupon, $items_to_apply, $amount = null ) {
$total_discount = 0;
$amount = $amount ? $amount : wc_add_number_precision( $coupon->get_amount() );
$items_to_apply = array_filter( $items_to_apply, array( $this, 'filter_products_with_price' ) );
$item_count = array_sum( wp_list_pluck( $items_to_apply, 'quantity' ) );
if ( ! $item_count ) {
return $total_discount;
}
if ( ! $amount ) {
// If there is no amount we still send it through so filters are fired.
$total_discount = $this->apply_coupon_fixed_product( $coupon, $items_to_apply, 0 );
} else {
$per_item_discount = absint( $amount / $item_count ); // round it down to the nearest cent.
if ( $per_item_discount > 0 ) {
$total_discount = $this->apply_coupon_fixed_product( $coupon, $items_to_apply, $per_item_discount );
/**
* If there is still discount remaining, repeat the process.
*/
if ( $total_discount > 0 && $total_discount < $amount ) {
$total_discount += $this->apply_coupon_fixed_cart( $coupon, $items_to_apply, $amount - $total_discount );
}
} elseif ( $amount > 0 ) {
$total_discount += $this->apply_coupon_remainder( $coupon, $items_to_apply, $amount );
}
}
return $total_discount;
}
/**
* Apply custom coupon discount to items.
*
* @since 3.3
* @param WC_Coupon $coupon Coupon object. Passed through filters.
* @param array $items_to_apply Array of items to apply the coupon to.
* @return int Total discounted.
*/
protected function apply_coupon_custom( $coupon, $items_to_apply ) {
$limit_usage_qty = 0;
$applied_count = 0;
if ( null !== $coupon->get_limit_usage_to_x_items() ) {
$limit_usage_qty = $coupon->get_limit_usage_to_x_items();
}
// Apply the coupon to each item.
foreach ( $items_to_apply as $item ) {
// Find out how much price is available to discount for the item.
$discounted_price = $this->get_discounted_price_in_cents( $item );
// Get the price we actually want to discount, based on settings.
$price_to_discount = wc_remove_number_precision( ( 'yes' === get_option( 'woocommerce_calc_discounts_sequentially', 'no' ) ) ? $discounted_price : $item->price );
// See how many and what price to apply to.
$apply_quantity = $limit_usage_qty && ( $limit_usage_qty - $applied_count ) < $item->quantity ? $limit_usage_qty - $applied_count : $item->quantity;
$apply_quantity = max( 0, apply_filters( 'woocommerce_coupon_get_apply_quantity', $apply_quantity, $item, $coupon, $this ) );
// Run coupon calculations.
$discount = wc_add_number_precision( $coupon->get_discount_amount( $price_to_discount / $item->quantity, $item->object, true ) ) * $apply_quantity;
$discount = wc_round_discount( min( $discounted_price, $discount ), 0 );
$applied_count = $applied_count + $apply_quantity;
// Store code and discount amount per item.
$this->discounts[ $coupon->get_code() ][ $item->key ] += $discount;
}
// Allow post-processing for custom coupon types (e.g. calculating discrepancy, etc).
$this->discounts[ $coupon->get_code() ] = apply_filters( 'woocommerce_coupon_custom_discounts_array', $this->discounts[ $coupon->get_code() ], $coupon );
return array_sum( $this->discounts[ $coupon->get_code() ] );
}
/**
* Deal with remaining fractional discounts by splitting it over items
* until the amount is expired, discounting 1 cent at a time.
*
* @since 3.2.0
* @param WC_Coupon $coupon Coupon object if applicable. Passed through filters.
* @param array $items_to_apply Array of items to apply the coupon to.
* @param int $amount Fixed discount amount to apply.
* @return int Total discounted.
*/
protected function apply_coupon_remainder( $coupon, $items_to_apply, $amount ) {
$total_discount = 0;
foreach ( $items_to_apply as $item ) {
for ( $i = 0; $i < $item->quantity; $i ++ ) {
// Find out how much price is available to discount for the item.
$price_to_discount = $this->get_discounted_price_in_cents( $item );
// Run coupon calculations.
$discount = min( $price_to_discount, 1 );
// Store totals.
$total_discount += $discount;
// Store code and discount amount per item.
$this->discounts[ $coupon->get_code() ][ $item->key ] += $discount;
if ( $total_discount >= $amount ) {
break 2;
}
}
if ( $total_discount >= $amount ) {
break;
}
}
return $total_discount;
}
/**
* Ensure coupon exists or throw exception.
*
* A coupon is also considered to no longer exist if it has been placed in the trash, even if the trash has not yet
* been emptied.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool
*/
protected function validate_coupon_exists( $coupon ) {
if ( ( ! $coupon->get_id() && ! $coupon->get_virtual() ) || 'trash' === $coupon->get_status() ) {
/* translators: %s: coupon code */
throw new Exception( sprintf( __( 'Coupon "%s" does not exist!', 'woocommerce' ), esc_html( $coupon->get_code() ) ), 105 );
}
return true;
}
/**
* Ensure coupon usage limit is valid or throw exception.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool
*/
protected function validate_coupon_usage_limit( $coupon ) {
if ( ! $coupon->get_usage_limit() ) {
return true;
}
$usage_count = $coupon->get_usage_count();
$data_store = $coupon->get_data_store();
$tentative_usage_count = is_callable( array( $data_store, 'get_tentative_usage_count' ) ) ? $data_store->get_tentative_usage_count( $coupon->get_id() ) : 0;
if ( $usage_count + $tentative_usage_count < $coupon->get_usage_limit() ) {
// All good.
return true;
}
// Coupon usage limit is reached. Let's show as informative error message as we can.
if ( 0 === $tentative_usage_count ) {
// No held coupon, usage limit is indeed reached.
$error_code = WC_Coupon::E_WC_COUPON_USAGE_LIMIT_REACHED;
} elseif ( is_user_logged_in() ) {
$recent_pending_orders = wc_get_orders(
array(
'limit' => 1,
'post_status' => array( 'wc-failed', 'wc-pending' ),
'customer' => get_current_user_id(),
'return' => 'ids',
)
);
if ( count( $recent_pending_orders ) > 0 ) {
// User logged in and have a pending order, maybe they are trying to use the coupon.
$error_code = WC_Coupon::E_WC_COUPON_USAGE_LIMIT_COUPON_STUCK;
} else {
$error_code = WC_Coupon::E_WC_COUPON_USAGE_LIMIT_REACHED;
}
} else {
// Maybe this user was trying to use the coupon but got stuck. We can't know for sure (performantly). Show a slightly better error message.
$error_code = WC_Coupon::E_WC_COUPON_USAGE_LIMIT_COUPON_STUCK_GUEST;
}
throw new Exception( $coupon->get_coupon_error( $error_code ), $error_code );
}
/**
* Ensure coupon user usage limit is valid or throw exception.
*
* Per user usage limit - check here if user is logged in (against user IDs).
* Checked again for emails later on in WC_Cart::check_customer_coupons().
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @param int $user_id User ID.
* @return bool
*/
protected function validate_coupon_user_usage_limit( $coupon, $user_id = 0 ) {
if ( empty( $user_id ) ) {
if ( $this->object instanceof WC_Order ) {
$user_id = $this->object->get_customer_id();
} else {
$user_id = get_current_user_id();
}
}
if ( $coupon && $user_id && apply_filters( 'woocommerce_coupon_validate_user_usage_limit', $coupon->get_usage_limit_per_user() > 0, $user_id, $coupon, $this ) && $coupon->get_id() && $coupon->get_data_store() ) {
$data_store = $coupon->get_data_store();
$usage_count = $data_store->get_usage_by_user_id( $coupon, $user_id );
if ( $usage_count >= $coupon->get_usage_limit_per_user() ) {
if ( $data_store->get_tentative_usages_for_user( $coupon->get_id(), array( $user_id ) ) > 0 ) {
$error_message = $coupon->get_coupon_error( WC_Coupon::E_WC_COUPON_USAGE_LIMIT_COUPON_STUCK );
$error_code = WC_Coupon::E_WC_COUPON_USAGE_LIMIT_COUPON_STUCK;
} else {
$error_message = $coupon->get_coupon_error( WC_Coupon::E_WC_COUPON_USAGE_LIMIT_REACHED );
$error_code = WC_Coupon::E_WC_COUPON_USAGE_LIMIT_REACHED;
}
throw new Exception( $error_message, $error_code );
}
}
return true;
}
/**
* Ensure coupon date is valid or throw exception.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool
*/
protected function validate_coupon_expiry_date( $coupon ) {
if ( $coupon->get_date_expires() && apply_filters( 'woocommerce_coupon_validate_expiry_date', time() > $coupon->get_date_expires()->getTimestamp(), $coupon, $this ) ) {
throw new Exception( __( 'This coupon has expired.', 'woocommerce' ), 107 );
}
return true;
}
/**
* Ensure coupon amount is valid or throw exception.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool
*/
protected function validate_coupon_minimum_amount( $coupon ) {
$subtotal = wc_remove_number_precision( $this->get_object_subtotal() );
if ( $coupon->get_minimum_amount() > 0 && apply_filters( 'woocommerce_coupon_validate_minimum_amount', $coupon->get_minimum_amount() > $subtotal, $coupon, $subtotal ) ) {
/* translators: %s: coupon minimum amount */
throw new Exception( sprintf( __( 'The minimum spend for this coupon is %s.', 'woocommerce' ), wc_price( $coupon->get_minimum_amount() ) ), 108 );
}
return true;
}
/**
* Ensure coupon amount is valid or throw exception.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool
*/
protected function validate_coupon_maximum_amount( $coupon ) {
$subtotal = wc_remove_number_precision( $this->get_object_subtotal() );
if ( $coupon->get_maximum_amount() > 0 && apply_filters( 'woocommerce_coupon_validate_maximum_amount', $coupon->get_maximum_amount() < $subtotal, $coupon ) ) {
/* translators: %s: coupon maximum amount */
throw new Exception( sprintf( __( 'The maximum spend for this coupon is %s.', 'woocommerce' ), wc_price( $coupon->get_maximum_amount() ) ), 112 );
}
return true;
}
/**
* Ensure coupon is valid for products in the list is valid or throw exception.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool
*/
protected function validate_coupon_product_ids( $coupon ) {
if ( count( $coupon->get_product_ids() ) > 0 ) {
$valid = false;
foreach ( $this->get_items_to_validate() as $item ) {
if ( $item->product && ( in_array( $item->product->get_id(), $coupon->get_product_ids(), true ) || in_array( $item->product->get_parent_id(), $coupon->get_product_ids(), true ) ) ) {
$valid = true;
break;
}
}
if ( ! $valid ) {
throw new Exception( __( 'Sorry, this coupon is not applicable to selected products.', 'woocommerce' ), 109 );
}
}
return true;
}
/**
* Ensure coupon is valid for product categories in the list is valid or throw exception.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool
*/
protected function validate_coupon_product_categories( $coupon ) {
if ( count( $coupon->get_product_categories() ) > 0 ) {
$valid = false;
foreach ( $this->get_items_to_validate() as $item ) {
if ( $coupon->get_exclude_sale_items() && $item->product && $item->product->is_on_sale() ) {
continue;
}
$product_cats = wc_get_product_cat_ids( $item->product->get_id() );
if ( $item->product->get_parent_id() ) {
$product_cats = array_merge( $product_cats, wc_get_product_cat_ids( $item->product->get_parent_id() ) );
}
// If we find an item with a cat in our allowed cat list, the coupon is valid.
if ( count( array_intersect( $product_cats, $coupon->get_product_categories() ) ) > 0 ) {
$valid = true;
break;
}
}
if ( ! $valid ) {
throw new Exception( __( 'Sorry, this coupon is not applicable to selected products.', 'woocommerce' ), 109 );
}
}
return true;
}
/**
* Ensure coupon is valid for sale items in the list is valid or throw exception.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool
*/
protected function validate_coupon_sale_items( $coupon ) {
if ( $coupon->get_exclude_sale_items() ) {
$valid = true;
foreach ( $this->get_items_to_validate() as $item ) {
if ( $item->product && $item->product->is_on_sale() ) {
$valid = false;
break;
}
}
if ( ! $valid ) {
throw new Exception( __( 'Sorry, this coupon is not valid for sale items.', 'woocommerce' ), 110 );
}
}
return true;
}
/**
* All exclusion rules must pass at the same time for a product coupon to be valid.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool
*/
protected function validate_coupon_excluded_items( $coupon ) {
$items = $this->get_items_to_validate();
if ( ! empty( $items ) && $coupon->is_type( wc_get_product_coupon_types() ) ) {
$valid = false;
foreach ( $items as $item ) {
if ( $item->product && $coupon->is_valid_for_product( $item->product, $item->object ) ) {
$valid = true;
break;
}
}
if ( ! $valid ) {
throw new Exception( __( 'Sorry, this coupon is not applicable to selected products.', 'woocommerce' ), 109 );
}
}
return true;
}
/**
* Cart discounts cannot be added if non-eligible product is found.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool
*/
protected function validate_coupon_eligible_items( $coupon ) {
if ( ! $coupon->is_type( wc_get_product_coupon_types() ) ) {
$this->validate_coupon_sale_items( $coupon );
$this->validate_coupon_excluded_product_ids( $coupon );
$this->validate_coupon_excluded_product_categories( $coupon );
}
return true;
}
/**
* Exclude products.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool
*/
protected function validate_coupon_excluded_product_ids( $coupon ) {
// Exclude Products.
if ( count( $coupon->get_excluded_product_ids() ) > 0 ) {
$products = array();
foreach ( $this->get_items_to_validate() as $item ) {
if ( $item->product && in_array( $item->product->get_id(), $coupon->get_excluded_product_ids(), true ) || in_array( $item->product->get_parent_id(), $coupon->get_excluded_product_ids(), true ) ) {
$products[] = $item->product->get_name();
}
}
if ( ! empty( $products ) ) {
/* translators: %s: products list */
throw new Exception( sprintf( __( 'Sorry, this coupon is not applicable to the products: %s.', 'woocommerce' ), implode( ', ', $products ) ), 113 );
}
}
return true;
}
/**
* Exclude categories from product list.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool
*/
protected function validate_coupon_excluded_product_categories( $coupon ) {
if ( count( $coupon->get_excluded_product_categories() ) > 0 ) {
$categories = array();
foreach ( $this->get_items_to_validate() as $item ) {
if ( ! $item->product ) {
continue;
}
$product_cats = wc_get_product_cat_ids( $item->product->get_id() );
if ( $item->product->get_parent_id() ) {
$product_cats = array_merge( $product_cats, wc_get_product_cat_ids( $item->product->get_parent_id() ) );
}
$cat_id_list = array_intersect( $product_cats, $coupon->get_excluded_product_categories() );
if ( count( $cat_id_list ) > 0 ) {
foreach ( $cat_id_list as $cat_id ) {
$cat = get_term( $cat_id, 'product_cat' );
$categories[] = $cat->name;
}
}
}
if ( ! empty( $categories ) ) {
/* translators: %s: categories list */
throw new Exception( sprintf( __( 'Sorry, this coupon is not applicable to the categories: %s.', 'woocommerce' ), implode( ', ', array_unique( $categories ) ) ), 114 );
}
}
return true;
}
/**
* Get the object subtotal
*
* @return int
*/
protected function get_object_subtotal() {
if ( is_a( $this->object, 'WC_Cart' ) ) {
return wc_add_number_precision( $this->object->get_displayed_subtotal() );
} elseif ( is_a( $this->object, 'WC_Order' ) ) {
$subtotal = wc_add_number_precision( $this->object->get_subtotal() );
if ( $this->object->get_prices_include_tax() ) {
// Add tax to tax-exclusive subtotal.
$subtotal = $subtotal + wc_add_number_precision( NumberUtil::round( $this->object->get_total_tax(), wc_get_price_decimals() ) );
}
return $subtotal;
} else {
return array_sum( wp_list_pluck( $this->items, 'price' ) );
}
}
/**
* Check if a coupon is valid.
*
* Error Codes:
* - 100: Invalid filtered.
* - 101: Invalid removed.
* - 102: Not yours removed.
* - 103: Already applied.
* - 104: Individual use only.
* - 105: Not exists.
* - 106: Usage limit reached.
* - 107: Expired.
* - 108: Minimum spend limit not met.
* - 109: Not applicable.
* - 110: Not valid for sale items.
* - 111: Missing coupon code.
* - 112: Maximum spend limit met.
* - 113: Excluded products.
* - 114: Excluded categories.
*
* @since 3.2.0
* @throws Exception Error message.
* @param WC_Coupon $coupon Coupon data.
* @return bool|WP_Error
*/
public function is_coupon_valid( $coupon ) {
try {
$this->validate_coupon_exists( $coupon );
$this->validate_coupon_usage_limit( $coupon );
$this->validate_coupon_user_usage_limit( $coupon );
$this->validate_coupon_expiry_date( $coupon );
$this->validate_coupon_minimum_amount( $coupon );
$this->validate_coupon_maximum_amount( $coupon );
$this->validate_coupon_product_ids( $coupon );
$this->validate_coupon_product_categories( $coupon );
$this->validate_coupon_excluded_items( $coupon );
$this->validate_coupon_eligible_items( $coupon );
if ( ! apply_filters( 'woocommerce_coupon_is_valid', true, $coupon, $this ) ) {
throw new Exception( __( 'Coupon is not valid.', 'woocommerce' ), 100 );
}
} catch ( Exception $e ) {
/**
* Filter the coupon error message.
*
* @param string $error_message Error message.
* @param int $error_code Error code.
* @param WC_Coupon $coupon Coupon data.
*/
$message = apply_filters( 'woocommerce_coupon_error', is_numeric( $e->getMessage() ) ? $coupon->get_coupon_error( $e->getMessage() ) : $e->getMessage(), $e->getCode(), $coupon );
return new WP_Error(
'invalid_coupon',
$message,
array(
'status' => 400,
)
);
}
return true;
}
}