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wp/wp-content/plugins/woocommerce/src/Admin/Overrides/OrderTraits.php

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+<?php
+/**
+ * WC Admin Order Trait
+ *
+ * WC Admin Order Trait class that houses shared functionality across order and refund classes.
+ */
+
+namespace Automattic\WooCommerce\Admin\Overrides;
+
+defined( 'ABSPATH' ) || exit;
+
+/**
+ * OrderTraits class.
+ */
+trait OrderTraits {
+	/**
+	 * Calculate shipping amount for line item/product as a total shipping amount ratio based on quantity.
+	 *
+	 * @param WC_Order_Item $item Line item from order.
+	 *
+	 * @return float|int
+	 */
+	public function get_item_shipping_amount( $item ) {
+		// Shipping amount loosely based on woocommerce code in includes/admin/meta-boxes/views/html-order-item(s).php
+		// distributed simply based on number of line items.
+		$product_qty = $item->get_quantity( 'edit' );
+		$order_items = $this->get_item_count();
+		if ( 0 === $order_items ) {
+			return 0;
+		}
+
+		$total_shipping_amount = (float) $this->get_shipping_total();
+
+		return $total_shipping_amount / $order_items * $product_qty;
+	}
+
+	/**
+	 * Calculate shipping tax amount for line item/product as a total shipping tax amount ratio based on quantity.
+	 *
+	 * Loosely based on code in includes/admin/meta-boxes/views/html-order-item(s).php.
+	 *
+	 * @todo If WC is currently not tax enabled, but it was before (or vice versa), would this work correctly?
+	 *
+	 * @param WC_Order_Item $item Line item from order.
+	 *
+	 * @return float|int
+	 */
+	public function get_item_shipping_tax_amount( $item ) {
+		$order_items = $this->get_item_count();
+		if ( 0 === $order_items ) {
+			return 0;
+		}
+
+		$product_qty               = $item->get_quantity( 'edit' );
+		$order_taxes               = $this->get_taxes();
+		$line_items_shipping       = $this->get_items( 'shipping' );
+		$total_shipping_tax_amount = 0;
+		foreach ( $line_items_shipping as $item_id => $shipping_item ) {
+			$tax_data = $shipping_item->get_taxes();
+			if ( $tax_data ) {
+				foreach ( $order_taxes as $tax_item ) {
+					$tax_item_id                = $tax_item->get_rate_id();
+					$tax_item_total             = isset( $tax_data['total'][ $tax_item_id ] ) ? (float) $tax_data['total'][ $tax_item_id ] : 0;
+					$total_shipping_tax_amount += $tax_item_total;
+				}
+			}
+		}
+		return $total_shipping_tax_amount / $order_items * $product_qty;
+	}
+
+	/**
+	 * Calculates coupon amount for specified line item/product.
+	 *
+	 * Coupon calculation based on woocommerce code in includes/admin/meta-boxes/views/html-order-item.php.
+	 *
+	 * @param WC_Order_Item $item Line item from order.
+	 *
+	 * @return float
+	 */
+	public function get_item_coupon_amount( $item ) {
+		return floatval( $item->get_subtotal( 'edit' ) - $item->get_total( 'edit' ) );
+	}
+}