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class-wc-cart.php
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class-wc-cart.php
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<?php
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly
}
/**
* WooCommerce cart
*
* The WooCommerce cart class stores cart data and active coupons as well as handling customer sessions and some cart related urls.
* The cart class also has a price calculation function which calls upon other classes to calculate totals.
*
* @class WC_Cart
* @version 2.1.0
* @package WooCommerce/Classes
* @category Class
* @author WooThemes
*/
class WC_Cart {
/** @var array Contains an array of cart items. */
public $cart_contents = array();
/** @var array Contains an array of removed cart items. */
public $removed_cart_contents = array();
/** @var array Contains an array of coupon codes applied to the cart. */
public $applied_coupons = array();
/** @var array Contains an array of coupon code discounts after they have been applied. */
public $coupon_discount_amounts = array();
/** @var array Contains an array of coupon code discount taxes. Used for tax incl pricing. */
public $coupon_discount_tax_amounts = array();
/** @var array Contains an array of coupon usage counts after they have been applied. */
public $coupon_applied_count = array();
/** @var array Array of coupons */
public $coupons = array();
/** @var float The total cost of the cart items. */
public $cart_contents_total;
/** @var float The total weight of the cart items. */
public $cart_contents_weight;
/** @var float The total count of the cart items. */
public $cart_contents_count;
/** @var float Cart grand total. */
public $total;
/** @var float Cart subtotal. */
public $subtotal;
/** @var float Cart subtotal without tax. */
public $subtotal_ex_tax;
/** @var float Total cart tax. */
public $tax_total;
/** @var array An array of taxes/tax rates for the cart. */
public $taxes;
/** @var array An array of taxes/tax rates for the shipping. */
public $shipping_taxes;
/** @var float Discount amount before tax */
public $discount_cart;
/** @var float Discounted tax amount. Used predominantly for displaying tax inclusive prices correctly */
public $discount_cart_tax;
/** @var float Total for additional fees. */
public $fee_total;
/** @var float Shipping cost. */
public $shipping_total;
/** @var float Shipping tax. */
public $shipping_tax_total;
/** @var array cart_session_data. Array of data the cart calculates and stores in the session with defaults */
public $cart_session_data = array(
'cart_contents_total' => 0,
'cart_contents_weight' => 0,
'cart_contents_count' => 0,
'total' => 0,
'subtotal' => 0,
'subtotal_ex_tax' => 0,
'tax_total' => 0,
'taxes' => array(),
'shipping_taxes' => array(),
'discount_cart' => 0,
'discount_cart_tax' => 0,
'shipping_total' => 0,
'shipping_tax_total' => 0,
'coupon_discount_amounts' => array(),
'coupon_discount_tax_amounts' => array(),
'fee_total' => 0,
'fees' => array()
);
/** @var array An array of fees. */
public $fees = array();
/** @var boolean Prices inc tax */
public $prices_include_tax;
/** @var boolean */
public $round_at_subtotal;
/** @var string */
public $tax_display_cart;
/** @var int Prices inc tax */
public $dp;
/** @var boolean */
public $display_totals_ex_tax;
/** @var boolean */
public $display_cart_ex_tax;
/**
* Constructor for the cart class. Loads options and hooks in the init method.
*/
public function __construct() {
$this->prices_include_tax = wc_prices_include_tax();
$this->round_at_subtotal = get_option( 'woocommerce_tax_round_at_subtotal' ) == 'yes';
$this->tax_display_cart = get_option( 'woocommerce_tax_display_cart' );
$this->dp = wc_get_price_decimals();
$this->display_totals_ex_tax = $this->tax_display_cart == 'excl';
$this->display_cart_ex_tax = $this->tax_display_cart == 'excl';
add_action( 'wp_loaded', array( $this, 'init' ) ); // Get cart after WP and plugins are loaded.
add_action( 'wp', array( $this, 'maybe_set_cart_cookies' ), 99 ); // Set cookies
add_action( 'shutdown', array( $this, 'maybe_set_cart_cookies' ), 0 ); // Set cookies before shutdown and ob flushing
add_action( 'woocommerce_add_to_cart', array( $this, 'calculate_totals' ), 20, 0 );
add_action( 'woocommerce_applied_coupon', array( $this, 'calculate_totals' ), 20, 0 );
}
/**
* Auto-load in-accessible properties on demand.
*
* @param mixed $key
* @return mixed
*/
public function __get( $key ) {
switch ( $key ) {
case 'tax':
_deprecated_argument( 'WC_Cart->tax', '2.3', 'Use WC_Tax:: directly' );
$this->tax = new WC_Tax();
return $this->tax;
case 'discount_total':
_deprecated_argument( 'WC_Cart->discount_total', '2.3', 'After tax coupons are no longer supported. For more information see: https://woocommerce.wordpress.com/2014/12/upcoming-coupon-changes-in-woocommerce-2-3/' );
return 0;
}
}
/**
* Loads the cart data from the PHP session during WordPress init and hooks in other methods.
*/
public function init() {
$this->get_cart_from_session();
add_action( 'woocommerce_check_cart_items', array( $this, 'check_cart_items' ), 1 );
add_action( 'woocommerce_check_cart_items', array( $this, 'check_cart_coupons' ), 1 );
add_action( 'woocommerce_after_checkout_validation', array( $this, 'check_customer_coupons' ), 1 );
}
/**
* Will set cart cookies if needed, once, during WP hook.
*/
public function maybe_set_cart_cookies() {
if ( ! headers_sent() && did_action( 'wp_loaded' ) ) {
if ( ! $this->is_empty() ) {
$this->set_cart_cookies( true );
} elseif ( isset( $_COOKIE['woocommerce_items_in_cart'] ) ) {
$this->set_cart_cookies( false );
}
}
}
/**
* Set cart hash cookie and items in cart.
*
* @access private
* @param bool $set (default: true)
*/
private function set_cart_cookies( $set = true ) {
if ( $set ) {
wc_setcookie( 'woocommerce_items_in_cart', 1 );
wc_setcookie( 'woocommerce_cart_hash', md5( json_encode( $this->get_cart_for_session() ) ) );
} elseif ( isset( $_COOKIE['woocommerce_items_in_cart'] ) ) {
wc_setcookie( 'woocommerce_items_in_cart', 0, time() - HOUR_IN_SECONDS );
wc_setcookie( 'woocommerce_cart_hash', '', time() - HOUR_IN_SECONDS );
}
do_action( 'woocommerce_set_cart_cookies', $set );
}
/*-----------------------------------------------------------------------------------*/
/* Cart Session Handling */
/*-----------------------------------------------------------------------------------*/
/**
* Get the cart data from the PHP session and store it in class variables.
*/
public function get_cart_from_session() {
// Load cart session data from session
foreach ( $this->cart_session_data as $key => $default ) {
$this->$key = WC()->session->get( $key, $default );
}
$update_cart_session = false;
$this->removed_cart_contents = array_filter( WC()->session->get( 'removed_cart_contents', array() ) );
$this->applied_coupons = array_filter( WC()->session->get( 'applied_coupons', array() ) );
/**
* Load the cart object. This defaults to the persistant cart if null.
*/
$cart = WC()->session->get( 'cart', null );
if ( is_null( $cart ) && ( $saved_cart = get_user_meta( get_current_user_id(), '_woocommerce_persistent_cart', true ) ) ) {
$cart = $saved_cart['cart'];
$update_cart_session = true;
} elseif ( is_null( $cart ) ) {
$cart = array();
}
if ( is_array( $cart ) ) {
foreach ( $cart as $key => $values ) {
$_product = wc_get_product( $values['variation_id'] ? $values['variation_id'] : $values['product_id'] );
if ( ! empty( $_product ) && $_product->exists() && $values['quantity'] > 0 ) {
if ( ! $_product->is_purchasable() ) {
// Flag to indicate the stored cart should be update
$update_cart_session = true;
wc_add_notice( sprintf( __( '%s has been removed from your cart because it can no longer be purchased. Please contact us if you need assistance.', 'woocommerce' ), $_product->get_title() ), 'error' );
do_action( 'woocommerce_remove_cart_item_from_session', $key, $values );
} else {
// Put session data into array. Run through filter so other plugins can load their own session data
$session_data = array_merge( $values, array( 'data' => $_product ) );
$this->cart_contents[ $key ] = apply_filters( 'woocommerce_get_cart_item_from_session', $session_data, $values, $key );
}
}
}
}
// Trigger action
do_action( 'woocommerce_cart_loaded_from_session', $this );
if ( $update_cart_session ) {
WC()->session->cart = $this->get_cart_for_session();
}
// Queue re-calc if subtotal is not set
if ( ( ! $this->subtotal && ! $this->is_empty() ) || $update_cart_session ) {
$this->calculate_totals();
}
}
/**
* Sets the php session data for the cart and coupons.
*/
public function set_session() {
// Set cart and coupon session data
$cart_session = $this->get_cart_for_session();
WC()->session->set( 'cart', $cart_session );
WC()->session->set( 'applied_coupons', $this->applied_coupons );
WC()->session->set( 'coupon_discount_amounts', $this->coupon_discount_amounts );
WC()->session->set( 'coupon_discount_tax_amounts', $this->coupon_discount_tax_amounts );
WC()->session->set( 'removed_cart_contents', $this->removed_cart_contents );
foreach ( $this->cart_session_data as $key => $default ) {
WC()->session->set( $key, $this->$key );
}
if ( get_current_user_id() ) {
$this->persistent_cart_update();
}
do_action( 'woocommerce_cart_updated' );
}
/**
* Empties the cart and optionally the persistent cart too.
*
* @param bool $clear_persistent_cart (default: true)
*/
public function empty_cart( $clear_persistent_cart = true ) {
$this->cart_contents = array();
$this->reset( true );
unset( WC()->session->order_awaiting_payment, WC()->session->applied_coupons, WC()->session->coupon_discount_amounts, WC()->session->coupon_discount_tax_amounts, WC()->session->cart );
if ( $clear_persistent_cart && get_current_user_id() ) {
$this->persistent_cart_destroy();
}
do_action( 'woocommerce_cart_emptied' );
}
/*-----------------------------------------------------------------------------------*/
/* Persistent cart handling */
/*-----------------------------------------------------------------------------------*/
/**
* Save the persistent cart when the cart is updated.
*/
public function persistent_cart_update() {
update_user_meta( get_current_user_id(), '_woocommerce_persistent_cart', array(
'cart' => WC()->session->get( 'cart' )
) );
}
/**
* Delete the persistent cart permanently.
*/
public function persistent_cart_destroy() {
delete_user_meta( get_current_user_id(), '_woocommerce_persistent_cart' );
}
/*-----------------------------------------------------------------------------------*/
/* Cart Data Functions */
/*-----------------------------------------------------------------------------------*/
/**
* Coupons enabled function. Filterable.
*
* @deprecated 2.5.0 in favor to wc_coupons_enabled()
*
* @return bool
*/
public function coupons_enabled() {
return wc_coupons_enabled();
}
/**
* Get number of items in the cart.
*
* @return int
*/
public function get_cart_contents_count() {
return apply_filters( 'woocommerce_cart_contents_count', $this->cart_contents_count );
}
/**
* Checks if the cart is empty.
*
* @return bool
*/
public function is_empty() {
return 0 === sizeof( $this->get_cart() );
}
/**
* Check all cart items for errors.
*/
public function check_cart_items() {
// Result
$return = true;
// Check cart item validity
$result = $this->check_cart_item_validity();
if ( is_wp_error( $result ) ) {
wc_add_notice( $result->get_error_message(), 'error' );
$return = false;
}
// Check item stock
$result = $this->check_cart_item_stock();
if ( is_wp_error( $result ) ) {
wc_add_notice( $result->get_error_message(), 'error' );
$return = false;
}
return $return;
}
/**
* Check cart coupons for errors.
*/
public function check_cart_coupons() {
foreach ( $this->applied_coupons as $code ) {
$coupon = new WC_Coupon( $code );
if ( ! $coupon->is_valid() ) {
// Error message
$coupon->add_coupon_message( WC_Coupon::E_WC_COUPON_INVALID_REMOVED );
// Remove the coupon
$this->remove_coupon( $code );
// Flag totals for refresh
WC()->session->set( 'refresh_totals', true );
}
}
}
/**
* Get cart items quantities - merged so we can do accurate stock checks on items across multiple lines.
*
* @return array
*/
public function get_cart_item_quantities() {
$quantities = array();
foreach ( $this->get_cart() as $cart_item_key => $values ) {
$_product = $values['data'];
if ( $_product->is_type( 'variation' ) && true === $_product->managing_stock() ) {
// Variation has stock levels defined so its handled individually
$quantities[ $values['variation_id'] ] = isset( $quantities[ $values['variation_id'] ] ) ? $quantities[ $values['variation_id'] ] + $values['quantity'] : $values['quantity'];
} else {
$quantities[ $values['product_id'] ] = isset( $quantities[ $values['product_id'] ] ) ? $quantities[ $values['product_id'] ] + $values['quantity'] : $values['quantity'];
}
}
return $quantities;
}
/**
* Looks through cart items and checks the posts are not trashed or deleted.
*
* @return bool|WP_Error
*/
public function check_cart_item_validity() {
foreach ( $this->get_cart() as $cart_item_key => $values ) {
$_product = $values['data'];
if ( ! $_product || ! $_product->exists() || $_product->post->post_status == 'trash' ) {
$this->set_quantity( $cart_item_key, 0 );
return new WP_Error( 'invalid', __( 'An item which is no longer available was removed from your cart.', 'woocommerce' ) );
}
}
return true;
}
/**
* Looks through the cart to check each item is in stock. If not, add an error.
*
* @return bool|WP_Error
*/
public function check_cart_item_stock() {
global $wpdb;
$error = new WP_Error();
$product_qty_in_cart = $this->get_cart_item_quantities();
// First stock check loop
foreach ( $this->get_cart() as $cart_item_key => $values ) {
$_product = $values['data'];
/**
* Check stock based on stock-status.
*/
if ( ! $_product->is_in_stock() ) {
$error->add( 'out-of-stock', sprintf(__( 'Sorry, "%s" is not in stock. Please edit your cart and try again. We apologise for any inconvenience caused.', 'woocommerce' ), $_product->get_title() ) );
return $error;
}
if ( ! $_product->managing_stock() ) {
continue;
}
$check_qty = $_product->is_type( 'variation' ) && true === $_product->managing_stock() ? $product_qty_in_cart[ $values['variation_id'] ] : $product_qty_in_cart[ $values['product_id'] ];
/**
* Check stock based on all items in the cart.
*/
if ( ! $_product->has_enough_stock( $check_qty ) ) {
$error->add( 'out-of-stock', sprintf(__( 'Sorry, we do not have enough "%s" in stock to fulfill your order (%s in stock). Please edit your cart and try again. We apologise for any inconvenience caused.', 'woocommerce' ), $_product->get_title(), $_product->get_stock_quantity() ) );
return $error;
}
/**
* Finally consider any held stock, from pending orders.
*/
if ( get_option( 'woocommerce_hold_stock_minutes' ) > 0 && ! $_product->backorders_allowed() ) {
$order_id = isset( WC()->session->order_awaiting_payment ) ? absint( WC()->session->order_awaiting_payment ) : 0;
$held_stock = $wpdb->get_var(
$wpdb->prepare( "
SELECT SUM( order_item_meta.meta_value ) AS held_qty
FROM {$wpdb->posts} AS posts
LEFT JOIN {$wpdb->prefix}woocommerce_order_items as order_items ON posts.ID = order_items.order_id
LEFT JOIN {$wpdb->prefix}woocommerce_order_itemmeta as order_item_meta ON order_items.order_item_id = order_item_meta.order_item_id
LEFT JOIN {$wpdb->prefix}woocommerce_order_itemmeta as order_item_meta2 ON order_items.order_item_id = order_item_meta2.order_item_id
WHERE order_item_meta.meta_key = '_qty'
AND order_item_meta2.meta_key = %s AND order_item_meta2.meta_value = %d
AND posts.post_type IN ( '" . implode( "','", wc_get_order_types() ) . "' )
AND posts.post_status = 'wc-pending'
AND posts.ID != %d;",
$_product->is_type( 'variation' ) && true === $_product->managing_stock() ? '_variation_id' : '_product_id',
$_product->is_type( 'variation' ) && true === $_product->managing_stock() ? $values['variation_id'] : $values['product_id'],
$order_id
)
);
$not_enough_stock = false;
if ( $_product->is_type( 'variation' ) && 'parent' === $_product->managing_stock() && $_product->parent->get_stock_quantity() < ( $held_stock + $check_qty ) ) {
$not_enough_stock = true;
} elseif ( $_product->get_stock_quantity() < ( $held_stock + $check_qty ) ) {
$not_enough_stock = true;
}
if ( $not_enough_stock ) {
$error->add( 'out-of-stock', sprintf(__( 'Sorry, we do not have enough "%s" in stock to fulfill your order right now. Please try again in %d minutes or edit your cart and try again. We apologise for any inconvenience caused.', 'woocommerce' ), $_product->get_title(), get_option( 'woocommerce_hold_stock_minutes' ) ) );
return $error;
}
}
}
return true;
}
/**
* Gets and formats a list of cart item data + variations for display on the frontend.
*
* @param array $cart_item
* @param bool $flat (default: false)
* @return string
*/
public function get_item_data( $cart_item, $flat = false ) {
$item_data = array();
// Variation data
if ( ! empty( $cart_item['data']->variation_id ) && is_array( $cart_item['variation'] ) ) {
foreach ( $cart_item['variation'] as $name => $value ) {
if ( '' === $value )
continue;
$taxonomy = wc_attribute_taxonomy_name( str_replace( 'attribute_pa_', '', urldecode( $name ) ) );
// If this is a term slug, get the term's nice name
if ( taxonomy_exists( $taxonomy ) ) {
$term = get_term_by( 'slug', $value, $taxonomy );
if ( ! is_wp_error( $term ) && $term && $term->name ) {
$value = $term->name;
}
$label = wc_attribute_label( $taxonomy );
// If this is a custom option slug, get the options name
} else {
$value = apply_filters( 'woocommerce_variation_option_name', $value );
$product_attributes = $cart_item['data']->get_attributes();
if ( isset( $product_attributes[ str_replace( 'attribute_', '', $name ) ] ) ) {
$label = wc_attribute_label( $product_attributes[ str_replace( 'attribute_', '', $name ) ]['name'] );
} else {
$label = $name;
}
}
$item_data[] = array(
'key' => $label,
'value' => $value
);
}
}
// Filter item data to allow 3rd parties to add more to the array
$item_data = apply_filters( 'woocommerce_get_item_data', $item_data, $cart_item );
// Format item data ready to display
foreach ( $item_data as $key => $data ) {
// Set hidden to true to not display meta on cart.
if ( ! empty( $data['hidden'] ) ) {
unset( $item_data[ $key ] );
continue;
}
$item_data[ $key ]['key'] = ! empty( $data['key'] ) ? $data['key'] : $data['name'];
$item_data[ $key ]['display'] = ! empty( $data['display'] ) ? $data['display'] : $data['value'];
}
// Output flat or in list format
if ( sizeof( $item_data ) > 0 ) {
ob_start();
if ( $flat ) {
foreach ( $item_data as $data ) {
echo esc_html( $data['key'] ) . ': ' . wp_kses_post( $data['display'] ) . "\n";
}
} else {
wc_get_template( 'cart/cart-item-data.php', array( 'item_data' => $item_data ) );
}
return ob_get_clean();
}
return '';
}
/**
* Gets cross sells based on the items in the cart.
*
* @return array cross_sells (item ids)
*/
public function get_cross_sells() {
$cross_sells = array();
$in_cart = array();
if ( ! $this->is_empty() ) {
foreach ( $this->get_cart() as $cart_item_key => $values ) {
if ( $values['quantity'] > 0 ) {
$cross_sells = array_merge( $values['data']->get_cross_sells(), $cross_sells );
$in_cart[] = $values['product_id'];
}
}
}
$cross_sells = array_diff( $cross_sells, $in_cart );
return $cross_sells;
}
/**
* Gets the url to the cart page.
*
* @deprecated 2.5.0 in favor to wc_get_cart_url()
*
* @return string url to page
*/
public function get_cart_url() {
return wc_get_cart_url();
}
/**
* Gets the url to the checkout page.
*
* @deprecated 2.5.0 in favor to wc_get_checkout_url()
*
* @return string url to page
*/
public function get_checkout_url() {
return wc_get_checkout_url();
}
/**
* Gets the url to remove an item from the cart.
*
* @param string cart_item_key contains the id of the cart item
* @return string url to page
*/
public function get_remove_url( $cart_item_key ) {
$cart_page_url = wc_get_page_permalink( 'cart' );
return apply_filters( 'woocommerce_get_remove_url', $cart_page_url ? wp_nonce_url( add_query_arg( 'remove_item', $cart_item_key, $cart_page_url ), 'woocommerce-cart' ) : '' );
}
/**
* Gets the url to re-add an item into the cart.
*
* @param string $cart_item_key
* @return string url to page
*/
public function get_undo_url( $cart_item_key ) {
$cart_page_url = wc_get_page_permalink( 'cart' );
$query_args = array(
'undo_item' => $cart_item_key,
);
return apply_filters( 'woocommerce_get_undo_url', $cart_page_url ? wp_nonce_url( add_query_arg( $query_args, $cart_page_url ), 'woocommerce-cart' ) : '' );
}
/**
* Returns the contents of the cart in an array.
*
* @return array contents of the cart
*/
public function get_cart() {
if ( ! did_action( 'wp_loaded' ) ) {
_doing_it_wrong( __FUNCTION__, __( 'Get cart should not be called before the wp_loaded action.', 'woocommerce' ), '2.3' );
}
if ( ! did_action( 'woocommerce_cart_loaded_from_session' ) ) {
$this->get_cart_from_session();
}
return array_filter( (array) $this->cart_contents );
}
/**
* Returns the contents of the cart in an array without the 'data' element.
*
* @return array contents of the cart
*/
public function get_cart_for_session() {
$cart_session = array();
if ( $this->get_cart() ) {
foreach ( $this->get_cart() as $key => $values ) {
$cart_session[ $key ] = $values;
unset( $cart_session[ $key ]['data'] ); // Unset product object
}
}
return $cart_session;
}
/**
* Returns a specific item in the cart.
*
* @return array item data
*/
public function get_cart_item( $item_key ) {
if ( isset( $this->cart_contents[ $item_key ] ) ) {
return $this->cart_contents[ $item_key ];
}
return array();
}
/**
* Returns the cart and shipping taxes, merged.
*
* @return array merged taxes
*/
public function get_taxes() {
$taxes = array();
// Merge
foreach ( array_keys( $this->taxes + $this->shipping_taxes ) as $key ) {
$taxes[ $key ] = ( isset( $this->shipping_taxes[ $key ] ) ? $this->shipping_taxes[ $key ] : 0 ) + ( isset( $this->taxes[ $key ] ) ? $this->taxes[ $key ] : 0 );
}
return apply_filters( 'woocommerce_cart_get_taxes', $taxes, $this );
}
/**
* Get taxes, merged by code, formatted ready for output.
*
* @return array
*/
public function get_tax_totals() {
$taxes = $this->get_taxes();
$tax_totals = array();
foreach ( $taxes as $key => $tax ) {
$code = WC_Tax::get_rate_code( $key );
if ( $code || $key === apply_filters( 'woocommerce_cart_remove_taxes_zero_rate_id', 'zero-rated' ) ) {
if ( ! isset( $tax_totals[ $code ] ) ) {
$tax_totals[ $code ] = new stdClass();
$tax_totals[ $code ]->amount = 0;
}
$tax_totals[ $code ]->tax_rate_id = $key;
$tax_totals[ $code ]->is_compound = WC_Tax::is_compound( $key );
$tax_totals[ $code ]->label = WC_Tax::get_rate_label( $key );
$tax_totals[ $code ]->amount += wc_round_tax_total( $tax );
$tax_totals[ $code ]->formatted_amount = wc_price( wc_round_tax_total( $tax_totals[ $code ]->amount ) );
}
}
return apply_filters( 'woocommerce_cart_tax_totals', $tax_totals, $this );
}
/**
* Get all tax classes for items in the cart.
* @return array
*/
public function get_cart_item_tax_classes() {
$found_tax_classes = array();
foreach ( WC()->cart->get_cart() as $item ) {
$found_tax_classes[] = $item['data']->get_tax_class();
}
return array_unique( $found_tax_classes );
}
/*-----------------------------------------------------------------------------------*/
/* Add to cart handling */
/*-----------------------------------------------------------------------------------*/
/**
* Check if product is in the cart and return cart item key.
*
* Cart item key will be unique based on the item and its properties, such as variations.
*
* @param mixed id of product to find in the cart
* @return string cart item key
*/
public function find_product_in_cart( $cart_id = false ) {
if ( $cart_id !== false ) {
if ( is_array( $this->cart_contents ) ) {
foreach ( $this->cart_contents as $cart_item_key => $cart_item ) {
if ( $cart_item_key == $cart_id ) {
return $cart_item_key;
}
}
}
}
return '';
}
/**
* Generate a unique ID for the cart item being added.
*
* @param int $product_id - id of the product the key is being generated for
* @param int $variation_id of the product the key is being generated for
* @param array $variation data for the cart item
* @param array $cart_item_data other cart item data passed which affects this items uniqueness in the cart
* @return string cart item key
*/
public function generate_cart_id( $product_id, $variation_id = 0, $variation = array(), $cart_item_data = array() ) {
$id_parts = array( $product_id );
if ( $variation_id && 0 != $variation_id ) {
$id_parts[] = $variation_id;
}
if ( is_array( $variation ) && ! empty( $variation ) ) {
$variation_key = '';
foreach ( $variation as $key => $value ) {
$variation_key .= trim( $key ) . trim( $value );
}
$id_parts[] = $variation_key;
}
if ( is_array( $cart_item_data ) && ! empty( $cart_item_data ) ) {
$cart_item_data_key = '';
foreach ( $cart_item_data as $key => $value ) {
if ( is_array( $value ) ) {
$value = http_build_query( $value );
}
$cart_item_data_key .= trim( $key ) . trim( $value );
}
$id_parts[] = $cart_item_data_key;
}
return md5( implode( '_', $id_parts ) );
}
/**
* Add a product to the cart.
*
* @param integer $product_id contains the id of the product to add to the cart
* @param integer $quantity contains the quantity of the item to add
* @param integer $variation_id
* @param array $variation attribute values
* @param array $cart_item_data extra cart item data we want to pass into the item
* @return string $cart_item_key
*/
public function add_to_cart( $product_id = 0, $quantity = 1, $variation_id = 0, $variation = array(), $cart_item_data = array() ) {
// Wrap in try catch so plugins can throw an exception to prevent adding to cart
try {
$product_id = absint( $product_id );
$variation_id = absint( $variation_id );
// Ensure we don't add a variation to the cart directly by variation ID
if ( 'product_variation' == get_post_type( $product_id ) ) {
$variation_id = $product_id;
$product_id = wp_get_post_parent_id( $variation_id );
}
// Get the product
$product_data = wc_get_product( $variation_id ? $variation_id : $product_id );
// Sanitity check
if ( $quantity <= 0 || ! $product_data || 'trash' === $product_data->post->post_status ) {
throw new Exception();
}
// Load cart item data - may be added by other plugins
$cart_item_data = (array) apply_filters( 'woocommerce_add_cart_item_data', $cart_item_data, $product_id, $variation_id );
// Generate a ID based on product ID, variation ID, variation data, and other cart item data
$cart_id = $this->generate_cart_id( $product_id, $variation_id, $variation, $cart_item_data );
// Find the cart item key in the existing cart
$cart_item_key = $this->find_product_in_cart( $cart_id );
// Force quantity to 1 if sold individually and check for exisitng item in cart
if ( $product_data->is_sold_individually() ) {
$quantity = apply_filters( 'woocommerce_add_to_cart_sold_individually_quantity', 1, $quantity, $product_id, $variation_id, $cart_item_data );
$in_cart_quantity = $cart_item_key ? $this->cart_contents[ $cart_item_key ]['quantity'] : 0;
if ( $in_cart_quantity > 0 ) {
throw new Exception( sprintf( '<a href="%s" class="button wc-forward">%s</a> %s', wc_get_cart_url(), __( 'View Cart', 'woocommerce' ), sprintf( __( 'You cannot add another "%s" to your cart.', 'woocommerce' ), $product_data->get_title() ) ) );
}
}
// Check product is_purchasable
if ( ! $product_data->is_purchasable() ) {
throw new Exception( __( 'Sorry, this product cannot be purchased.', 'woocommerce' ) );
}
// Stock check - only check if we're managing stock and backorders are not allowed
if ( ! $product_data->is_in_stock() ) {
throw new Exception( sprintf( __( 'You cannot add "%s" to the cart because the product is out of stock.', 'woocommerce' ), $product_data->get_title() ) );
}
if ( ! $product_data->has_enough_stock( $quantity ) ) {
throw new Exception( sprintf(__( 'You cannot add that amount of "%s" to the cart because there is not enough stock (%s remaining).', 'woocommerce' ), $product_data->get_title(), $product_data->get_stock_quantity() ) );
}
// Stock check - this time accounting for whats already in-cart
if ( $managing_stock = $product_data->managing_stock() ) {
$products_qty_in_cart = $this->get_cart_item_quantities();
if ( $product_data->is_type( 'variation' ) && true === $managing_stock ) {
$check_qty = isset( $products_qty_in_cart[ $variation_id ] ) ? $products_qty_in_cart[ $variation_id ] : 0;
} else {
$check_qty = isset( $products_qty_in_cart[ $product_id ] ) ? $products_qty_in_cart[ $product_id ] : 0;
}
/**
* Check stock based on all items in the cart.
*/
if ( ! $product_data->has_enough_stock( $check_qty + $quantity ) ) {
throw new Exception( sprintf(
'<a href="%s" class="button wc-forward">%s</a> %s',
wc_get_cart_url(),
__( 'View Cart', 'woocommerce' ),
sprintf( __( 'You cannot add that amount to the cart — we have %s in stock and you already have %s in your cart.', 'woocommerce' ), $product_data->get_stock_quantity(), $check_qty )
) );
}
}
// If cart_item_key is set, the item is already in the cart
if ( $cart_item_key ) {
$new_quantity = $quantity + $this->cart_contents[ $cart_item_key ]['quantity'];
$this->set_quantity( $cart_item_key, $new_quantity, false );
} else {
$cart_item_key = $cart_id;
// Add item after merging with $cart_item_data - hook to allow plugins to modify cart item
$this->cart_contents[ $cart_item_key ] = apply_filters( 'woocommerce_add_cart_item', array_merge( $cart_item_data, array(
'product_id' => $product_id,
'variation_id' => $variation_id,
'variation' => $variation,
'quantity' => $quantity,
'data' => $product_data
) ), $cart_item_key );
}
if ( did_action( 'wp' ) ) {
$this->set_cart_cookies( ! $this->is_empty() );
}
do_action( 'woocommerce_add_to_cart', $cart_item_key, $product_id, $quantity, $variation_id, $variation, $cart_item_data );
return $cart_item_key;
} catch ( Exception $e ) {
if ( $e->getMessage() ) {
wc_add_notice( $e->getMessage(), 'error' );
}
return false;
}
}
/**
* Remove a cart item.
*
* @since 2.3.0
* @param string $cart_item_key
* @return bool
*/
public function remove_cart_item( $cart_item_key ) {
if ( isset( $this->cart_contents[ $cart_item_key ] ) ) {
$this->removed_cart_contents[ $cart_item_key ] = $this->cart_contents[ $cart_item_key ];
unset( $this->removed_cart_contents[ $cart_item_key ]['data'] );
do_action( 'woocommerce_remove_cart_item', $cart_item_key, $this );
unset( $this->cart_contents[ $cart_item_key ] );
do_action( 'woocommerce_cart_item_removed', $cart_item_key, $this );
$this->calculate_totals();
return true;
}
return false;
}
/**
* Restore a cart item.
*
* @param string $cart_item_key
* @return bool
*/
public function restore_cart_item( $cart_item_key ) {
if ( isset( $this->removed_cart_contents[ $cart_item_key ] ) ) {
$this->cart_contents[ $cart_item_key ] = $this->removed_cart_contents[ $cart_item_key ];