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    <h3>Editing: OrderSchema.php</h3>
    <textarea name="content" rows="20" cols="80">&lt;?php
namespace Automattic\WooCommerce\StoreApi\Schemas\V1;

use Automattic\WooCommerce\StoreApi\SchemaController;
use Automattic\WooCommerce\StoreApi\Schemas\ExtendSchema;
use Automattic\WooCommerce\StoreApi\Utilities\OrderController;

/**
 * OrderSchema class.
 */
class OrderSchema extends AbstractSchema {
	/**
	 * The schema item name.
	 *
	 * @var string
	 */
	protected $title = 'order';

	/**
	 * The schema item identifier.
	 *
	 * @var string
	 */
	const IDENTIFIER = 'order';

	/**
	 * Item schema instance.
	 *
	 * @var OrderItemSchema
	 */
	public $item_schema;

	/**
	 * Order controller class instance.
	 *
	 * @var OrderController
	 */
	protected $order_controller;

	/**
	 * Coupon schema instance.
	 *
	 * @var OrderCouponSchema
	 */
	public $coupon_schema;

	/**
	 * Product item schema instance representing cross-sell items.
	 *
	 * @var ProductSchema
	 */
	public $cross_sells_item_schema;

	/**
	 * Fee schema instance.
	 *
	 * @var OrderFeeSchema
	 */
	public $fee_schema;

	/**
	 * Shipping rates schema instance.
	 *
	 * @var CartShippingRateSchema
	 */
	public $shipping_rate_schema;

	/**
	 * Shipping address schema instance.
	 *
	 * @var ShippingAddressSchema
	 */
	public $shipping_address_schema;

	/**
	 * Billing address schema instance.
	 *
	 * @var BillingAddressSchema
	 */
	public $billing_address_schema;

	/**
	 * Error schema instance.
	 *
	 * @var ErrorSchema
	 */
	public $error_schema;

	/**
	 * Constructor.
	 *
	 * @param ExtendSchema     $extend Rest Extending instance.
	 * @param SchemaController $controller Schema Controller instance.
	 */
	public function __construct( ExtendSchema $extend, SchemaController $controller ) {
		parent::__construct( $extend, $controller );
		$this-&gt;item_schema             = $this-&gt;controller-&gt;get( OrderItemSchema::IDENTIFIER );
		$this-&gt;coupon_schema           = $this-&gt;controller-&gt;get( OrderCouponSchema::IDENTIFIER );
		$this-&gt;fee_schema              = $this-&gt;controller-&gt;get( OrderFeeSchema::IDENTIFIER );
		$this-&gt;shipping_rate_schema    = $this-&gt;controller-&gt;get( CartShippingRateSchema::IDENTIFIER );
		$this-&gt;shipping_address_schema = $this-&gt;controller-&gt;get( ShippingAddressSchema::IDENTIFIER );
		$this-&gt;billing_address_schema  = $this-&gt;controller-&gt;get( BillingAddressSchema::IDENTIFIER );
		$this-&gt;error_schema            = $this-&gt;controller-&gt;get( ErrorSchema::IDENTIFIER );
		$this-&gt;order_controller        = new OrderController();
	}

	/**
	 * Order schema properties.
	 *
	 * @return array
	 */
	public function get_properties() {
		return [
			'id'                   =&gt; [
				'description' =&gt; __( 'The order ID.', 'woocommerce' ),
				'type'        =&gt; 'integer',
				'context'     =&gt; [ 'view', 'edit' ],
				'readonly'    =&gt; true,
			],
			'items'                =&gt; [
				'description' =&gt; __( 'Line items data.', 'woocommerce' ),
				'type'        =&gt; 'array',
				'context'     =&gt; [ 'view', 'edit' ],
				'items'       =&gt; [
					'type'       =&gt; 'object',
					'properties' =&gt; $this-&gt;force_schema_readonly( $this-&gt;item_schema-&gt;get_properties() ),
				],
			],
			'totals'               =&gt; [
				'description' =&gt; __( 'Order totals.', 'woocommerce' ),
				'type'        =&gt; 'object',
				'context'     =&gt; [ 'view', 'edit' ],
				'readonly'    =&gt; true,
				'properties'  =&gt; array_merge(
					$this-&gt;get_store_currency_properties(),
					[
						'subtotal'           =&gt; [
							'description' =&gt; __( 'Subtotal of the order.', 'woocommerce' ),
							'type'        =&gt; 'string',
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
						],
						'total_discount'     =&gt; [
							'description' =&gt; __( 'Total discount from applied coupons.', 'woocommerce' ),
							'type'        =&gt; 'string',
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
						],
						'total_shipping'     =&gt; [
							'description' =&gt; __( 'Total price of shipping.', 'woocommerce' ),
							'type'        =&gt; [ 'string', 'null' ],
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
						],
						'total_fees'         =&gt; [
							'description' =&gt; __( 'Total price of any applied fees.', 'woocommerce' ),
							'type'        =&gt; 'string',
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
						],
						'total_tax'          =&gt; [
							'description' =&gt; __( 'Total tax applied to the order.', 'woocommerce' ),
							'type'        =&gt; 'string',
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
						],
						'total_refund'       =&gt; [
							'description' =&gt; __( 'Total refund applied to the order.', 'woocommerce' ),
							'type'        =&gt; 'string',
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
						],
						'total_price'        =&gt; [
							'description' =&gt; __( 'Total price the customer will pay.', 'woocommerce' ),
							'type'        =&gt; 'string',
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
						],
						'total_items'        =&gt; [
							'description' =&gt; __( 'Total price of items in the order.', 'woocommerce' ),
							'type'        =&gt; 'string',
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
						],
						'total_items_tax'    =&gt; [
							'description' =&gt; __( 'Total tax on items in the order.', 'woocommerce' ),
							'type'        =&gt; 'string',
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
						],
						'total_fees_tax'     =&gt; [
							'description' =&gt; __( 'Total tax on fees.', 'woocommerce' ),
							'type'        =&gt; 'string',
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
						],
						'total_discount_tax' =&gt; [
							'description' =&gt; __( 'Total tax removed due to discount from applied coupons.', 'woocommerce' ),
							'type'        =&gt; 'string',
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
						],
						'total_shipping_tax' =&gt; [
							'description' =&gt; __( 'Total tax on shipping. If shipping has not been calculated, a null response will be sent.', 'woocommerce' ),
							'type'        =&gt; [ 'string', 'null' ],
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
						],
						'tax_lines'          =&gt; [
							'description' =&gt; __( 'Lines of taxes applied to items and shipping.', 'woocommerce' ),
							'type'        =&gt; 'array',
							'context'     =&gt; [ 'view', 'edit' ],
							'readonly'    =&gt; true,
							'items'       =&gt; [
								'type'       =&gt; 'object',
								'properties' =&gt; [
									'name'  =&gt; [
										'description' =&gt; __( 'The name of the tax.', 'woocommerce' ),
										'type'        =&gt; 'string',
										'context'     =&gt; [ 'view', 'edit' ],
										'readonly'    =&gt; true,
									],
									'price' =&gt; [
										'description' =&gt; __( 'The amount of tax charged.', 'woocommerce' ),
										'type'        =&gt; 'string',
										'context'     =&gt; [ 'view', 'edit' ],
										'readonly'    =&gt; true,
									],
									'rate'  =&gt; [
										'description' =&gt; __( 'The rate at which tax is applied.', 'woocommerce' ),
										'type'        =&gt; 'string',
										'context'     =&gt; [ 'view', 'edit' ],
										'readonly'    =&gt; true,
									],
								],
							],
						],
					]
				),
			],
			'coupons'              =&gt; [
				'description' =&gt; __( 'List of applied cart coupons.', 'woocommerce' ),
				'type'        =&gt; 'array',
				'context'     =&gt; [ 'view', 'edit' ],
				'readonly'    =&gt; true,
				'items'       =&gt; [
					'type'       =&gt; 'object',
					'properties' =&gt; $this-&gt;force_schema_readonly( $this-&gt;coupon_schema-&gt;get_properties() ),
				],
			],
			'shipping_address'     =&gt; [
				'description' =&gt; __( 'Current set shipping address for the customer.', 'woocommerce' ),
				'type'        =&gt; 'object',
				'context'     =&gt; [ 'view', 'edit' ],
				'readonly'    =&gt; true,
				'properties'  =&gt; $this-&gt;force_schema_readonly( $this-&gt;shipping_address_schema-&gt;get_properties() ),
			],
			'billing_address'      =&gt; [
				'description' =&gt; __( 'Current set billing address for the customer.', 'woocommerce' ),
				'type'        =&gt; 'object',
				'context'     =&gt; [ 'view', 'edit' ],
				'readonly'    =&gt; true,
				'properties'  =&gt; $this-&gt;force_schema_readonly( $this-&gt;billing_address_schema-&gt;get_properties() ),
			],
			'needs_payment'        =&gt; [
				'description' =&gt; __( 'True if the cart needs payment. False for carts with only free products and no shipping costs.', 'woocommerce' ),
				'type'        =&gt; 'boolean',
				'context'     =&gt; [ 'view', 'edit' ],
				'readonly'    =&gt; true,
			],
			'needs_shipping'       =&gt; [
				'description' =&gt; __( 'True if the cart needs shipping. False for carts with only digital goods or stores with no shipping methods set-up.', 'woocommerce' ),
				'type'        =&gt; 'boolean',
				'context'     =&gt; [ 'view', 'edit' ],
				'readonly'    =&gt; true,
			],
			'errors'               =&gt; [
				'description' =&gt; __( 'List of cart item errors, for example, items in the cart which are out of stock.', 'woocommerce' ),
				'type'        =&gt; 'array',
				'context'     =&gt; [ 'view', 'edit' ],
				'readonly'    =&gt; true,
				'items'       =&gt; [
					'type'       =&gt; 'object',
					'properties' =&gt; $this-&gt;force_schema_readonly( $this-&gt;error_schema-&gt;get_properties() ),
				],
			],
			'payment_requirements' =&gt; [
				'description' =&gt; __( 'List of required payment gateway features to process the order.', 'woocommerce' ),
				'type'        =&gt; 'array',
				'context'     =&gt; [ 'view', 'edit' ],
				'readonly'    =&gt; true,
			],
			'status'               =&gt; [
				'description' =&gt; __( 'Status of the order.', 'woocommerce' ),
				'type'        =&gt; 'string',
				'context'     =&gt; [ 'view', 'edit' ],
				'readonly'    =&gt; true,
			],
		];
	}

	/**
	 * Get an order for response.
	 *
	 * @param \WC_Order $order Order instance.
	 * @return array
	 */
	public function get_item_response( $order ) {
		$order_id                 = $order-&gt;get_id();
		$errors                   = [];
		$failed_order_stock_error = $this-&gt;order_controller-&gt;get_failed_order_stock_error( $order_id );
		if ( $failed_order_stock_error ) {
			$errors[] = $failed_order_stock_error;
		}

		return [
			'id'                   =&gt; $order_id,
			'status'               =&gt; $order-&gt;get_status(),
			'items'                =&gt; $this-&gt;get_item_responses_from_schema( $this-&gt;item_schema, $order-&gt;get_items() ),
			'coupons'              =&gt; $this-&gt;get_item_responses_from_schema( $this-&gt;coupon_schema, $order-&gt;get_items( 'coupon' ) ),
			'fees'                 =&gt; $this-&gt;get_item_responses_from_schema( $this-&gt;fee_schema, $order-&gt;get_items( 'fee' ) ),
			'totals'               =&gt; (object) $this-&gt;prepare_currency_response( $this-&gt;get_totals( $order ) ),
			'shipping_address'     =&gt; (object) $this-&gt;shipping_address_schema-&gt;get_item_response( $order ),
			'billing_address'      =&gt; (object) $this-&gt;billing_address_schema-&gt;get_item_response( $order ),
			'needs_payment'        =&gt; $order-&gt;needs_payment(),
			'needs_shipping'       =&gt; $order-&gt;needs_shipping_address(),
			'payment_requirements' =&gt; $this-&gt;extend-&gt;get_payment_requirements(),
			'errors'               =&gt; $errors,
		];
	}

	/**
	 * Get total data.
	 *
	 * @param \WC_Order $order Order instance.
	 * @return array
	 */
	protected function get_totals( $order ) {
		return [
			'subtotal'           =&gt; $this-&gt;prepare_money_response( $order-&gt;get_subtotal() ),
			'total_discount'     =&gt; $this-&gt;prepare_money_response( $order-&gt;get_total_discount() ),
			'total_shipping'     =&gt; $this-&gt;prepare_money_response( $order-&gt;get_total_shipping() ),
			'total_fees'         =&gt; $this-&gt;prepare_money_response( $order-&gt;get_total_fees() ),
			'total_tax'          =&gt; $this-&gt;prepare_money_response( $order-&gt;get_total_tax() ),
			'total_refund'       =&gt; $this-&gt;prepare_money_response( $order-&gt;get_total_refunded() ),
			'total_price'        =&gt; $this-&gt;prepare_money_response( $order-&gt;get_total() ),
			'total_items'        =&gt; $this-&gt;prepare_money_response(
				array_sum(
					array_map(
						function( $item ) {
							return $item-&gt;get_total();
						},
						array_values( $order-&gt;get_items( 'line_item' ) )
					)
				)
			),
			'total_items_tax'    =&gt; $this-&gt;prepare_money_response(
				array_sum(
					array_map(
						function( $item ) {
							return $item-&gt;get_tax_total();
						},
						array_values( $order-&gt;get_items( 'tax' ) )
					)
				)
			),
			'total_fees_tax'     =&gt; $this-&gt;prepare_money_response(
				array_sum(
					array_map(
						function( $item ) {
							return $item-&gt;get_total_tax();
						},
						array_values( $order-&gt;get_items( 'fee' ) )
					)
				)
			),
			'total_discount_tax' =&gt; $this-&gt;prepare_money_response( $order-&gt;get_discount_tax() ),
			'total_shipping_tax' =&gt; $this-&gt;prepare_money_response( $order-&gt;get_shipping_tax() ),
			'tax_lines'          =&gt; array_map(
				function( $item ) {
					return [
						'name'  =&gt; $item-&gt;get_label(),
						'price' =&gt; $this-&gt;prepare_money_response( $item-&gt;get_tax_total() ),
						'rate'  =&gt; strval( $item-&gt;get_rate_percent() ),
					];
				},
				array_values( $order-&gt;get_items( 'tax' ) )
			),
		];
	}
}
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