wp-graphql-woocommerce/includes/connection/class-coupons.php

<?php
/**
 * Connection - Coupons
 *
 * Registers connections to Coupon
 *
 * @package WPGraphQL\WooCommerce\Connection
 */

namespace WPGraphQL\WooCommerce\Connection;

use GraphQL\Type\Definition\ResolveInfo;
use WPGraphQL\AppContext;
use WPGraphQL\WooCommerce\Data\Factory;

/**
 * Class - Coupons
 */
class Coupons {

	/**
	 * Registers the various connections from other Types to Coupon
	 */
	public static function register_connections() {
		// From RootQuery.
		register_graphql_connection( self::get_connection_config() );

		// From Cart.
		register_graphql_connection(
			self::get_connection_config(
				array(
					'fromType'      => 'Cart',
					'fromFieldName' => 'appliedCoupons',
				)
			)
		);
	}

	/**
	 * Given an array of $args, this returns the connection config, merging the provided args
	 * with the defaults.
	 *
	 * @param array $args - Connection configuration.
	 * @return array
	 */
	public static function get_connection_config( $args = array() ): array {
		return array_merge(
			array(
				'fromType'       => 'RootQuery',
				'toType'         => 'Coupon',
				'fromFieldName'  => 'coupons',
				'connectionArgs' => self::get_connection_args(),
				'resolve'        => function ( $source, $args, $context, $info ) {
					return Factory::resolve_coupon_connection( $source, $args, $context, $info );
				},
			),
			$args
		);
	}

	/**
	 * Returns array of where args.
	 *
	 * @return array
	 */
	public static function get_connection_args(): array {
		return array_merge(
			get_wc_cpt_connection_args(),
			array(
				'code' => array(
					'type'        => 'String',
					'description' => __( 'Limit result set to resources with a specific code.', 'wp-graphql-woocommerce' ),
				),
			)
		);
	}
}