Pricing_Controller::get_items( WP_REST_Request $request )

	public function get_items( $request ) {
		$customer = new Customer( get_current_user_id() );

		/**
		 * Filter the customer group ID passed to the BigCommerce API.
		 * Null to use the default guest group. 0 to use unmodified catalog pricing.
		 *
		 * @param int|null The customer group ID
		 */
		$customer_group = apply_filters( 'bigcommerce/pricing/customer_group_id', $customer->get_group_id() );
		$currency_code  = get_option( Currency::CURRENCY_CODE, 'USD' );

		$args = [
			'items'             => $this->filter_empty_options( $request->get_param( 'items' ) ?: [] ),
			'channel_id'        => $this->get_channel_id(),
			'currency_code'     => $currency_code,
			'customer_group_id' => $customer_group,
		];
		/**
		 * Filters pricing request arguments.
		 *
		 * @param array            $args    Arguments.
		 * @param \WP_REST_Request $request Full details about the request.
		 */
		$args = apply_filters( 'bigcommerce/pricing/request_args', $args, $request );

		try {
			$pricing_request  = new PricingRequest( $args );
			$pricing_response = $this->pricing_api->getPrices( $pricing_request );

			// convert items from objects to JSON
			$items    = array_map( [ $this, 'format_prices' ], $pricing_response->getData() );
			$response = [
				'items' => $items,
			];

			return rest_ensure_response( $response );
		} catch ( \Exception $e ) {
			return new \WP_Error( 'gateway_error', $e->getMessage(), [ 'exception' => $e ] );
		}
	}