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Current File : /home/web/dev.agtindia.co.in/bedpe/wp-content/plugins/woocommerce/includes/class-wc-cart-totals.php
<?php
/**
 * Cart totals calculation class.
 *
 * Methods are protected and class is final to keep this as an internal API.
 * May be opened in the future once structure is stable.
 *
 * Rounding guide:
 * - if something is being stored e.g. item total, store unrounded. This is so taxes can be recalculated later accurately.
 * - if calculating a total, round (if settings allow).
 *
 * @package WooCommerce\Classes
 * @version 3.2.0
 */

use Automattic\WooCommerce\Enums\ProductTaxStatus;
use Automattic\WooCommerce\Utilities\NumberUtil;

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

/**
 * WC_Cart_Totals class.
 *
 * @since 3.2.0
 */
final class WC_Cart_Totals {
	use WC_Item_Totals;

	/**
	 * Reference to cart object.
	 *
	 * @since 3.2.0
	 * @var WC_Cart
	 */
	protected $cart;

	/**
	 * Line items to calculate.
	 *
	 * @since 3.2.0
	 * @var array
	 */
	protected $items = array();

	/**
	 * Fees to calculate.
	 *
	 * @since 3.2.0
	 * @var array
	 */
	protected $fees = array();

	/**
	 * Shipping costs.
	 *
	 * @since 3.2.0
	 * @var array
	 */
	protected $shipping = array();

	/**
	 * Applied coupon objects.
	 *
	 * @since 3.2.0
	 * @var array
	 */
	protected $coupons = array();

	/**
	 * Item/coupon discount totals.
	 *
	 * @since 3.2.0
	 * @var array
	 */
	protected $coupon_discount_totals = array();

	/**
	 * Item/coupon discount tax totals.
	 *
	 * @since 3.2.0
	 * @var array
	 */
	protected $coupon_discount_tax_totals = array();

	/**
	 * Should taxes be calculated?
	 *
	 * @var boolean
	 */
	protected $calculate_tax = true;

	/**
	 * Stores totals.
	 *
	 * @since 3.2.0
	 * @var array
	 */
	protected $totals = array(
		'fees_total'         => 0,
		'fees_total_tax'     => 0,
		'items_subtotal'     => 0,
		'items_subtotal_tax' => 0,
		'items_total'        => 0,
		'items_total_tax'    => 0,
		'total'              => 0,
		'shipping_total'     => 0,
		'shipping_tax_total' => 0,
		'discounts_total'    => 0,
	);

	/**
	 * Cache of tax rates for a given tax class.
	 *
	 * @var array
	 */
	protected $item_tax_rates;

	/**
	 * Sets up the items provided, and calculate totals.
	 *
	 * @since 3.2.0
	 * @throws Exception If missing WC_Cart object.
	 * @param WC_Cart $cart Cart object to calculate totals for.
	 */
	public function __construct( &$cart = null ) {
		if ( ! is_a( $cart, 'WC_Cart' ) ) {
			throw new Exception( 'A valid WC_Cart object is required' );
		}

		// Check if customer is VAT exempt, if customer is defined.
		$customer               = $cart->get_customer();
		$is_customer_vat_exempt = $customer && $customer->get_is_vat_exempt();

		$this->cart          = $cart;
		$this->calculate_tax = wc_tax_enabled() && ! $is_customer_vat_exempt;
		$this->calculate();
	}

	/**
	 * Run all calculation methods on the given items in sequence.
	 *
	 * @since 3.2.0
	 */
	protected function calculate() {
		$this->calculate_item_totals();
		$this->calculate_shipping_totals();
		$this->calculate_fee_totals();
		$this->calculate_totals();
	}

	/**
	 * Get default blank set of props used per item.
	 *
	 * @since  3.2.0
	 * @return array
	 */
	protected function get_default_item_props() {
		return (object) array(
			'object'             => null,
			'tax_class'          => '',
			'taxable'            => false,
			'quantity'           => 0,
			'product'            => false,
			'price_includes_tax' => false,
			'subtotal'           => 0,
			'subtotal_tax'       => 0,
			'subtotal_taxes'     => array(),
			'total'              => 0,
			'total_tax'          => 0,
			'taxes'              => array(),
		);
	}

	/**
	 * Get default blank set of props used per fee.
	 *
	 * @since  3.2.0
	 * @return array
	 */
	protected function get_default_fee_props() {
		return (object) array(
			'object'    => null,
			'tax_class' => '',
			'taxable'   => false,
			'total_tax' => 0,
			'taxes'     => array(),
		);
	}

	/**
	 * Get default blank set of props used per shipping row.
	 *
	 * @since  3.2.0
	 * @return array
	 */
	protected function get_default_shipping_props() {
		return (object) array(
			'object'    => null,
			'tax_class' => '',
			'taxable'   => false,
			'total'     => 0,
			'total_tax' => 0,
			'taxes'     => array(),
		);
	}

	/**
	 * Handles a cart or order object passed in for calculation. Normalises data
	 * into the same format for use by this class.
	 *
	 * Each item is made up of the following props, in addition to those returned by get_default_item_props() for totals.
	 *  - key: An identifier for the item (cart item key or line item ID).
	 *  - cart_item: For carts, the cart item from the cart which may include custom data.
	 *  - quantity: The qty for this line.
	 *  - price: The line price in cents.
	 *  - product: The product object this cart item is for.
	 *
	 * @since 3.2.0
	 */
	protected function get_items_from_cart() {
		$this->items = array();

		foreach ( $this->cart->get_cart() as $cart_item_key => $cart_item ) {
			$item                          = $this->get_default_item_props();
			$item->key                     = $cart_item_key;
			$item->object                  = $cart_item;
			$item->tax_class               = $cart_item['data']->get_tax_class();
			$item->taxable                 = ProductTaxStatus::TAXABLE === $cart_item['data']->get_tax_status();
			$item->price_includes_tax      = wc_prices_include_tax();
			$item->quantity                = $cart_item['quantity'];
			$item->price                   = wc_add_number_precision_deep( (float) $cart_item['data']->get_price() * (float) $cart_item['quantity'] );
			$item->product                 = $cart_item['data'];
			$item->tax_rates               = $this->get_item_tax_rates( $item );
			$this->items[ $cart_item_key ] = $item;
		}
	}

	/**
	 * Get item costs grouped by tax class.
	 *
	 * @since  3.2.0
	 * @return array
	 */
	protected function get_tax_class_costs() {
		$item_tax_classes     = wp_list_pluck( $this->items, 'tax_class' );
		$shipping_tax_classes = wp_list_pluck( $this->shipping, 'tax_class' );
		$fee_tax_classes      = wp_list_pluck( $this->fees, 'tax_class' );
		$costs                = array_fill_keys( $item_tax_classes + $shipping_tax_classes + $fee_tax_classes, 0 );
		$costs['non-taxable'] = 0;

		foreach ( $this->items + $this->fees + $this->shipping as $item ) {
			if ( 0 > $item->total ) {
				continue;
			}
			if ( ! $item->taxable ) {
				$costs['non-taxable'] += $item->total;
			} elseif ( 'inherit' === $item->tax_class ) {
				$costs[ reset( $item_tax_classes ) ] += $item->total;
			} else {
				$costs[ $item->tax_class ] += $item->total;
			}
		}
		return array_filter( $costs );
	}

	/**
	 * Get fee objects from the cart. Normalises data
	 * into the same format for use by this class.
	 *
	 * @since 3.2.0
	 */
	protected function get_fees_from_cart() {
		$this->fees = array();
		$this->cart->calculate_fees();

		$fee_running_total = 0;

		foreach ( $this->cart->get_fees() as $fee_key => $fee_object ) {
			$fee            = $this->get_default_fee_props();
			$fee->object    = $fee_object;
			$fee->tax_class = $fee->object->tax_class;
			$fee->taxable   = $fee->object->taxable;
			$fee->total     = wc_add_number_precision_deep( $fee->object->amount );

			// Negative fees should not make the order total go negative.
			if ( 0 > $fee->total ) {
				$max_discount = NumberUtil::round( $this->get_total( 'items_total', true ) + $fee_running_total + $this->get_total( 'shipping_total', true ) ) * -1;

				if ( $fee->total < $max_discount ) {
					$fee->total = $max_discount;
				}
			}

			$fee_running_total += $fee->total;

			if ( $this->calculate_tax ) {
				if ( 0 > $fee->total ) {
					// Negative fees should have the taxes split between all items so it works as a true discount.
					$tax_class_costs = $this->get_tax_class_costs();
					$total_cost      = array_sum( $tax_class_costs );

					if ( $total_cost ) {
						foreach ( $tax_class_costs as $tax_class => $tax_class_cost ) {
							if ( 'non-taxable' === $tax_class ) {
								continue;
							}
							$proportion               = $tax_class_cost / $total_cost;
							$cart_discount_proportion = $fee->total * $proportion;
							$fee->taxes               = wc_array_merge_recursive_numeric( $fee->taxes, WC_Tax::calc_tax( $fee->total * $proportion, WC_Tax::get_rates( $tax_class ) ) );
						}
					}
				} elseif ( $fee->object->taxable ) {
					$fee->taxes = WC_Tax::calc_tax( $fee->total, WC_Tax::get_rates( $fee->tax_class, $this->cart->get_customer() ), false );
				}
			}

			$fee->taxes     = apply_filters( 'woocommerce_cart_totals_get_fees_from_cart_taxes', $fee->taxes, $fee, $this );
			$fee->total_tax = array_sum( array_map( array( $this, 'round_line_tax' ), $fee->taxes ) );

			// Set totals within object.
			$fee->object->total    = wc_remove_number_precision_deep( $fee->total );
			$fee->object->tax_data = wc_remove_number_precision_deep( $fee->taxes );
			$fee->object->tax      = wc_remove_number_precision_deep( $fee->total_tax );

			$this->fees[ $fee_key ] = $fee;
		}
	}

	/**
	 * Get shipping methods from the cart and normalise.
	 *
	 * @since 3.2.0
	 */
	protected function get_shipping_from_cart() {
		$default_shipping_props = $this->get_default_shipping_props();
		$this->shipping         = array_map(
			function ( $shipping_object ) use ( $default_shipping_props ) {
				$shipping_line            = clone $default_shipping_props;
				$shipping_line->object    = $shipping_object;
				$shipping_line->tax_class = get_option( 'woocommerce_shipping_tax_class', 'inherit' );
				$shipping_line->taxable   = true;
				$shipping_line->total     = wc_add_number_precision_deep( $shipping_object->cost );
				$shipping_line->taxes     = array_map(
					array( $this, 'round_item_subtotal' ),
					wc_add_number_precision_deep( $shipping_object->taxes, false )
				);
				$shipping_line->total_tax = array_sum( $shipping_line->taxes );
				return $shipping_line;
			},
			$this->cart->calculate_shipping()
		);
	}

	/**
	 * Return array of coupon objects from the cart. Normalises data
	 * into the same format for use by this class.
	 *
	 * @since  3.2.0
	 */
	protected function get_coupons_from_cart() {
		$this->coupons = $this->cart->get_coupons();

		foreach ( $this->coupons as $coupon ) {
			switch ( $coupon->get_discount_type() ) {
				case 'fixed_product':
					$coupon->sort = 1;
					break;
				case 'percent':
					$coupon->sort = 2;
					break;
				case 'fixed_cart':
					$coupon->sort = 3;
					break;
				default:
					$coupon->sort = 0;
					break;
			}

			// Allow plugins to override the default order.
			$coupon->sort = apply_filters( 'woocommerce_coupon_sort', $coupon->sort, $coupon );
		}

		uasort( $this->coupons, array( $this, 'sort_coupons_callback' ) );
	}

	/**
	 * Sort coupons so discounts apply consistently across installs.
	 *
	 * In order of priority;
	 *  - sort param
	 *  - usage restriction
	 *  - coupon value
	 *  - ID
	 *
	 * @param WC_Coupon $a Coupon object.
	 * @param WC_Coupon $b Coupon object.
	 * @return int
	 */
	protected function sort_coupons_callback( $a, $b ) {
		if ( $a->sort === $b->sort ) {
			if ( $a->get_limit_usage_to_x_items() === $b->get_limit_usage_to_x_items() ) {
				if ( $a->get_amount() === $b->get_amount() ) {
					return $b->get_id() - $a->get_id();
				}
				return ( $a->get_amount() < $b->get_amount() ) ? -1 : 1;
			}
			return ( $a->get_limit_usage_to_x_items() < $b->get_limit_usage_to_x_items() ) ? -1 : 1;
		}
		return ( $a->sort < $b->sort ) ? -1 : 1;
	}

	/**
	 * Ran to remove all base taxes from an item. Used when prices include tax, and the customer is tax exempt.
	 *
	 * @since 3.2.2
	 * @param object $item Item to adjust the prices of.
	 * @return object
	 */
	protected function remove_item_base_taxes( $item ) {
		if ( $item->price_includes_tax && $item->taxable ) {
			if ( apply_filters( 'woocommerce_adjust_non_base_location_prices', true ) ) {
				$base_tax_rates = WC_Tax::get_base_tax_rates( $item->product->get_tax_class( 'unfiltered' ) );
			} else {
				/**
				 * If we want all customers to pay the same price on this store, we should not remove base taxes from a VAT exempt user's price,
				 * but just the relevant tax rate. See issue #20911.
				 */
				$base_tax_rates = $item->tax_rates;
			}

			// Work out a new base price without the shop's base tax.
			$taxes = WC_Tax::calc_tax( $item->price, $base_tax_rates, true );

			// Now we have a new item price (excluding TAX).
			$item->price              = NumberUtil::round( $item->price - array_sum( $taxes ) );
			$item->price_includes_tax = false;
		}
		return $item;
	}

	/**
	 * Only ran if woocommerce_adjust_non_base_location_prices is true.
	 *
	 * If the customer is outside of the base location, this removes the base
	 * taxes. This is off by default unless the filter is used.
	 *
	 * Uses edit context so unfiltered tax class is returned.
	 *
	 * @since 3.2.0
	 * @param object $item Item to adjust the prices of.
	 * @return object
	 */
	protected function adjust_non_base_location_price( $item ) {
		if ( $item->price_includes_tax && $item->taxable ) {
			$base_tax_rates = WC_Tax::get_base_tax_rates( $item->product->get_tax_class( 'unfiltered' ) );

			if ( $item->tax_rates !== $base_tax_rates ) {
				// Work out a new base price without the shop's base tax.
				$taxes     = WC_Tax::calc_tax( $item->price, $base_tax_rates, true );
				$new_taxes = WC_Tax::calc_tax( $item->price - array_sum( $taxes ), $item->tax_rates, false );

				// Now we have a new item price.
				$item->price = $item->price - array_sum( $taxes ) + array_sum( $new_taxes );
			}
		}
		return $item;
	}

	/**
	 * Get discounted price of an item with precision (in cents).
	 *
	 * @since  3.2.0
	 * @param  object $item_key Item to get the price of.
	 * @return int
	 */
	protected function get_discounted_price_in_cents( $item_key ) {
		$item  = $this->items[ $item_key ];
		$price = isset( $this->coupon_discount_totals[ $item_key ] ) ? $item->price - $this->coupon_discount_totals[ $item_key ] : $item->price;
		return $price;
	}

	/**
	 * Get tax rates for an item. Caches rates in class to avoid multiple look ups.
	 *
	 * @param  object $item Item to get tax rates for.
	 * @return array of taxes
	 */
	protected function get_item_tax_rates( $item ) {
		if ( ! wc_tax_enabled() ) {
			return array();
		}
		$tax_class      = $item->product->get_tax_class();
		$item_tax_rates = isset( $this->item_tax_rates[ $tax_class ] ) ? $this->item_tax_rates[ $tax_class ] : $this->item_tax_rates[ $tax_class ] = WC_Tax::get_rates( $item->product->get_tax_class(), $this->cart->get_customer() );

		// Allow plugins to filter item tax rates.
		return apply_filters( 'woocommerce_cart_totals_get_item_tax_rates', $item_tax_rates, $item, $this->cart );
	}

	/**
	 * Get item costs grouped by tax class.
	 *
	 * @since  3.2.0
	 * @return array
	 */
	protected function get_item_costs_by_tax_class() {
		$tax_classes = array(
			'non-taxable' => 0,
		);

		foreach ( $this->items + $this->fees + $this->shipping as $item ) {
			if ( ! isset( $tax_classes[ $item->tax_class ] ) ) {
				$tax_classes[ $item->tax_class ] = 0;
			}

			if ( $item->taxable ) {
				$tax_classes[ $item->tax_class ] += $item->total;
			} else {
				$tax_classes['non-taxable'] += $item->total;
			}
		}

		return $tax_classes;
	}

	/**
	 * Get a single total with or without precision (in cents).
	 *
	 * @since  3.2.0
	 * @param  string $key Total to get.
	 * @param  bool   $in_cents Should the totals be returned in cents, or without precision.
	 * @return int|float
	 */
	public function get_total( $key = 'total', $in_cents = false ) {
		$totals = $this->get_totals( $in_cents );
		return isset( $totals[ $key ] ) ? $totals[ $key ] : 0;
	}

	/**
	 * Set a single total.
	 *
	 * @since  3.2.0
	 * @param string $key Total name you want to set.
	 * @param int    $total Total to set.
	 */
	protected function set_total( $key, $total ) {
		$this->totals[ $key ] = $total;
	}

	/**
	 * Get all totals with or without precision (in cents).
	 *
	 * @since  3.2.0
	 * @param  bool $in_cents Should the totals be returned in cents, or without precision.
	 * @return array.
	 */
	public function get_totals( $in_cents = false ) {
		return $in_cents ? $this->totals : wc_remove_number_precision_deep( $this->totals );
	}

	/**
	 * Returns array of values for totals calculation.
	 *
	 * @param string $field Field name. Will probably be `total` or `subtotal`.
	 * @return array Items object
	 */
	protected function get_values_for_total( $field ) {
		return array_values( wp_list_pluck( $this->items, $field ) );
	}

	/**
	 * Get taxes merged by type.
	 *
	 * @since 3.2.0
	 * @param  bool         $in_cents If returned value should be in cents.
	 * @param  array|string $types    Types to merge and return. Defaults to all.
	 * @return array
	 */
	protected function get_merged_taxes( $in_cents = false, $types = array( 'items', 'fees', 'shipping' ) ) {
		$items = array();
		$taxes = array();

		if ( is_string( $types ) ) {
			$types = array( $types );
		}

		foreach ( $types as $type ) {
			if ( isset( $this->$type ) ) {
				$items = array_merge( $items, $this->$type );
			}
		}

		foreach ( $items as $item ) {
			foreach ( $item->taxes as $rate_id => $rate ) {
				if ( ! isset( $taxes[ $rate_id ] ) ) {
					$taxes[ $rate_id ] = 0;
				}
				$taxes[ $rate_id ] += $this->round_line_tax( $rate );
			}
		}

		return $in_cents ? $taxes : wc_remove_number_precision_deep( $taxes );
	}

	/**
	 * Round merged taxes.
	 *
	 * @deprecated 3.9.0 `calculate_item_subtotals` should already appropriately round the tax values.
	 * @since 3.5.4
	 * @param array $taxes Taxes to round.
	 * @return array
	 */
	protected function round_merged_taxes( $taxes ) {
		foreach ( $taxes as $rate_id => $tax ) {
			$taxes[ $rate_id ] = $this->round_line_tax( $tax );
		}

		return $taxes;
	}

	/**
	 * Combine item taxes into a single array, preserving keys.
	 *
	 * @since 3.2.0
	 * @param array $item_taxes Taxes to combine.
	 * @return array
	 */
	protected function combine_item_taxes( $item_taxes ) {
		$merged_taxes = array();
		foreach ( $item_taxes as $taxes ) {
			foreach ( $taxes as $tax_id => $tax_amount ) {
				if ( ! isset( $merged_taxes[ $tax_id ] ) ) {
					$merged_taxes[ $tax_id ] = 0;
				}
				$merged_taxes[ $tax_id ] += $tax_amount;
			}
		}
		return $merged_taxes;
	}

	/*
	|--------------------------------------------------------------------------
	| Calculation methods.
	|--------------------------------------------------------------------------
	*/

	/**
	 * Calculate item totals.
	 *
	 * @since 3.2.0
	 */
	protected function calculate_item_totals() {
		$this->get_items_from_cart();
		$this->calculate_item_subtotals();
		$this->calculate_discounts();

		foreach ( $this->items as $item_key => $item ) {
			$item->total     = $this->get_discounted_price_in_cents( $item_key );
			$item->total_tax = 0;

			if ( has_filter( 'woocommerce_get_discounted_price' ) ) {
				$item->total = wc_add_number_precision(
					/**
					 * Allow plugins to filter this price like in the legacy cart class.
					 *
					 * This is legacy and should probably be deprecated in the future.
					 * $item->object is the cart item object.
					 * $this->cart is the cart object.
					 *
					 * @since 3.2.0
					 */
					(float) apply_filters( 'woocommerce_get_discounted_price', wc_remove_number_precision( $item->total ), $item->object, $this->cart )
				);
			}

			if ( $this->calculate_tax && $item->product->is_taxable() ) {
				$total_taxes     = apply_filters( 'woocommerce_calculate_item_totals_taxes', WC_Tax::calc_tax( $item->total, $item->tax_rates, $item->price_includes_tax ), $item, $this );
				$item->taxes     = $total_taxes;
				$item->total_tax = array_sum( array_map( array( $this, 'round_line_tax' ), $item->taxes ) );

				if ( $item->price_includes_tax ) {
					// Use unrounded taxes so we can re-calculate from the orders screen accurately later.
					$item->total = $item->total - array_sum( $item->taxes );
				}
			}

			$this->cart->cart_contents[ $item_key ]['line_tax_data']['total'] = wc_remove_number_precision_deep( $item->taxes );
			$this->cart->cart_contents[ $item_key ]['line_total']             = wc_remove_number_precision( $item->total );
			$this->cart->cart_contents[ $item_key ]['line_tax']               = wc_remove_number_precision( $item->total_tax );
		}

		$items_total = $this->get_rounded_items_total( $this->get_values_for_total( 'total' ) );

		$this->set_total( 'items_total', $items_total );
		$this->set_total( 'items_total_tax', array_sum( array_values( wp_list_pluck( $this->items, 'total_tax' ) ) ) );

		$this->cart->set_cart_contents_total( $this->get_total( 'items_total' ) );
		$this->cart->set_cart_contents_tax( array_sum( $this->get_merged_taxes( false, 'items' ) ) );
		$this->cart->set_cart_contents_taxes( $this->get_merged_taxes( false, 'items' ) );
	}

	/**
	 * Subtotals are costs before discounts.
	 *
	 * To prevent rounding issues we need to work with the inclusive price where possible
	 * otherwise we'll see errors such as when working with a 9.99 inc price, 20% VAT which would
	 * be 8.325 leading to totals being 1p off.
	 *
	 * Pre tax coupons come off the price the customer thinks they are paying - tax is calculated
	 * afterwards.
	 *
	 * e.g. $100 bike with $10 coupon = customer pays $90 and tax worked backwards from that.
	 *
	 * @since 3.2.0
	 */
	protected function calculate_item_subtotals() {
		$merged_subtotal_taxes = array(); // Taxes indexed by tax rate ID for storage later.

		$adjust_non_base_location_prices = apply_filters( 'woocommerce_adjust_non_base_location_prices', true );
		$customer                        = $this->cart->get_customer();
		$is_customer_vat_exempt          = $customer && $customer->get_is_vat_exempt();

		foreach ( $this->items as $item_key => $item ) {
			if ( $item->price_includes_tax ) {
				if ( $is_customer_vat_exempt ) {
					$item = $this->remove_item_base_taxes( $item );
				} elseif ( $adjust_non_base_location_prices ) {
					$item = $this->adjust_non_base_location_price( $item );
				}
			}

			$item->subtotal = $item->price;

			if ( $this->calculate_tax && $item->product->is_taxable() ) {
				$item->subtotal_taxes = WC_Tax::calc_tax( $item->subtotal, $item->tax_rates, $item->price_includes_tax );
				$item->subtotal_tax   = array_sum( array_map( array( $this, 'round_line_tax' ), $item->subtotal_taxes ) );

				if ( $item->price_includes_tax ) {
					// Use unrounded taxes so we can re-calculate from the orders screen accurately later.
					$item->subtotal = $item->subtotal - array_sum( $item->subtotal_taxes );
				}

				foreach ( $item->subtotal_taxes as $rate_id => $rate ) {
					if ( ! isset( $merged_subtotal_taxes[ $rate_id ] ) ) {
						$merged_subtotal_taxes[ $rate_id ] = 0;
					}
					$merged_subtotal_taxes[ $rate_id ] += $this->round_line_tax( $rate );
				}
			}

			$this->cart->cart_contents[ $item_key ]['line_tax_data']     = array( 'subtotal' => wc_remove_number_precision_deep( $item->subtotal_taxes ) );
			$this->cart->cart_contents[ $item_key ]['line_subtotal']     = wc_remove_number_precision( $item->subtotal );
			$this->cart->cart_contents[ $item_key ]['line_subtotal_tax'] = wc_remove_number_precision( $item->subtotal_tax );
		}

		$items_subtotal = $this->get_rounded_items_total( $this->get_values_for_total( 'subtotal' ) );

		// Prices are not rounded here because they should already be rounded based on settings in `get_rounded_items_total` and in `round_line_tax` method calls.
		$this->set_total( 'items_subtotal', $items_subtotal );
		$this->set_total( 'items_subtotal_tax', array_sum( $merged_subtotal_taxes ) );

		$this->cart->set_subtotal( $this->get_total( 'items_subtotal' ) );
		$this->cart->set_subtotal_tax( $this->get_total( 'items_subtotal_tax' ) );
	}

	/**
	 * Calculate COUPON based discounts which change item prices.
	 *
	 * @since 3.2.0
	 * @uses  WC_Discounts class.
	 */
	protected function calculate_discounts() {
		$this->get_coupons_from_cart();

		$discounts = new WC_Discounts( $this->cart );

		// Set items directly so the discounts class can see any tax adjustments made thus far using subtotals.
		$discounts->set_items( $this->items );

		foreach ( $this->coupons as $coupon ) {
			$discounts->apply_coupon( $coupon );
		}

		$coupon_discount_amounts     = $discounts->get_discounts_by_coupon( true );
		$coupon_discount_tax_amounts = array();

		// See how much tax was 'discounted' per item and per coupon.
		if ( $this->calculate_tax ) {
			foreach ( $discounts->get_discounts( true ) as $coupon_code => $coupon_discounts ) {
				$coupon_discount_tax_amounts[ $coupon_code ] = 0;

				foreach ( $coupon_discounts as $item_key => $coupon_discount ) {
					$item = $this->items[ $item_key ];

					if ( $item->product->is_taxable() ) {
						// Item subtotals were sent, so set 3rd param.
						$item_tax = array_sum( WC_Tax::calc_tax( $coupon_discount, $item->tax_rates, $item->price_includes_tax ) );

						// Sum total tax.
						$coupon_discount_tax_amounts[ $coupon_code ] += $item_tax;

						// Remove tax from discount total.
						if ( $item->price_includes_tax ) {
							$coupon_discount_amounts[ $coupon_code ] -= $item_tax;
						}
					}
				}
			}
		}

		$this->coupon_discount_totals     = (array) $discounts->get_discounts_by_item( true );
		$this->coupon_discount_tax_totals = $coupon_discount_tax_amounts;

		if ( wc_prices_include_tax() ) {
			$this->set_total( 'discounts_total', array_sum( $this->coupon_discount_totals ) - array_sum( $this->coupon_discount_tax_totals ) );
			$this->set_total( 'discounts_tax_total', array_sum( $this->coupon_discount_tax_totals ) );
		} else {
			$this->set_total( 'discounts_total', array_sum( $this->coupon_discount_totals ) );
			$this->set_total( 'discounts_tax_total', array_sum( $this->coupon_discount_tax_totals ) );
		}

		$this->cart->set_coupon_discount_totals( wc_remove_number_precision_deep( $coupon_discount_amounts ) );
		$this->cart->set_coupon_discount_tax_totals( wc_remove_number_precision_deep( $coupon_discount_tax_amounts ) );

		// Add totals to cart object. Note: Discount total for cart is excl tax.
		$this->cart->set_discount_total( $this->get_total( 'discounts_total' ) );
		$this->cart->set_discount_tax( $this->get_total( 'discounts_tax_total' ) );
	}

	/**
	 * Triggers the cart fees API, grabs the list of fees, and calculates taxes.
	 *
	 * Note: This class sets the totals for the 'object' as they are calculated. This is so that APIs like the fees API can see these totals if needed.
	 *
	 * @since 3.2.0
	 */
	protected function calculate_fee_totals() {
		$this->get_fees_from_cart();

		$this->set_total( 'fees_total', array_sum( wp_list_pluck( $this->fees, 'total' ) ) );
		$this->set_total( 'fees_total_tax', array_sum( wp_list_pluck( $this->fees, 'total_tax' ) ) );

		$this->cart->fees_api()->set_fees( wp_list_pluck( $this->fees, 'object' ) );
		$this->cart->set_fee_total( wc_remove_number_precision_deep( array_sum( wp_list_pluck( $this->fees, 'total' ) ) ) );
		$this->cart->set_fee_tax( wc_remove_number_precision_deep( array_sum( wp_list_pluck( $this->fees, 'total_tax' ) ) ) );
		$this->cart->set_fee_taxes( wc_remove_number_precision_deep( $this->combine_item_taxes( wp_list_pluck( $this->fees, 'taxes' ) ) ) );
	}

	/**
	 * Calculate any shipping taxes.
	 *
	 * @since 3.2.0
	 */
	protected function calculate_shipping_totals() {
		$this->get_shipping_from_cart();
		$this->set_total( 'shipping_total', array_sum( wp_list_pluck( $this->shipping, 'total' ) ) );
		$this->set_total( 'shipping_tax_total', array_sum( wp_list_pluck( $this->shipping, 'total_tax' ) ) );

		$this->cart->set_shipping_total( $this->get_total( 'shipping_total' ) );
		$this->cart->set_shipping_tax( $this->get_total( 'shipping_tax_total' ) );
		$this->cart->set_shipping_taxes( wc_remove_number_precision_deep( $this->combine_item_taxes( wp_list_pluck( $this->shipping, 'taxes' ) ) ) );
	}

	/**
	 * Main cart totals.
	 *
	 * @since 3.2.0
	 */
	protected function calculate_totals() {
		$this->set_total( 'total', NumberUtil::round( $this->get_total( 'items_total', true ) + $this->get_total( 'fees_total', true ) + $this->get_total( 'shipping_total', true ) + array_sum( $this->get_merged_taxes( true ) ), 0 ) );
		$items_tax = array_sum( $this->get_merged_taxes( false, array( 'items' ) ) );
		// Shipping and fee taxes are rounded separately because they were entered excluding taxes (as opposed to item prices, which may or may not be including taxes depending upon settings).
		$shipping_and_fee_taxes = NumberUtil::round( array_sum( $this->get_merged_taxes( false, array( 'fees', 'shipping' ) ) ), wc_get_price_decimals() );
		$this->cart->set_total_tax( $items_tax + $shipping_and_fee_taxes );

		// Allow plugins to hook and alter totals before final total is calculated.
		if ( has_action( 'woocommerce_calculate_totals' ) ) {
			do_action( 'woocommerce_calculate_totals', $this->cart );
		}

		// Allow plugins to filter the grand total, and sum the cart totals in case of modifications.
		$this->cart->set_total( max( 0, apply_filters( 'woocommerce_calculated_total', $this->get_total( 'total' ), $this->cart ) ) );
	}
}

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