wp-graphql-woocommerce/includes/connection/class-product-attributes.php

<?php
/**
 * Connection type - ProductAttributes
 *
 * Registers connections to ProductAttribute
 *
 * @package WPGraphQL\WooCommerce\Connection
 * @since 0.0.1
 */

namespace WPGraphQL\WooCommerce\Connection;

use GraphQL\Error\Error;
use GraphQL\Type\Definition\ResolveInfo;
use WPGraphQL\AppContext;
use WPGraphQL\WooCommerce\Data\Connection\Product_Attribute_Connection_Resolver;

/**
 * Class Product_Attributes
 */
class Product_Attributes {
	/**
	 * Registers the various connections from other Types to ProductAttribute.
	 *
	 * @return void
	 */
	public static function register_connections() {
		// From RootQuery to GlobalProductAttribute.
		register_graphql_connection(
			self::get_connection_config(
				[
					'fromType'      => 'RootQuery',
					'toType'        => 'GlobalProductAttribute',
					'fromFieldName' => 'productAttributes',
				]
			)
		);

		// From ProductCategory to GlobalProductAttribute.
		register_graphql_connection(
			self::get_connection_config(
				[
					'fromType'      => 'ProductCategory',
					'toType'        => 'GlobalProductAttribute',
					'fromFieldName' => 'productAttributes',
				]
			)
		);
	}

	/**
	 * Given an array of $args, this returns the connection config, merging the provided args
	 * with the defaults.
	 *
	 * @param array $args - Connection configuration.
	 * @throws \GraphQL\Error\Error If the "fromType" or "toType" is not provided.
	 *
	 * @return array
	 */
	public static function get_connection_config( $args = [] ): array {
		if ( ! isset( $args['fromType'] ) ) {
			throw new Error( __( 'The "fromType" is required for the ProductAttributes connection.', 'graphql-for-ecommerce' ) );
		}

		if ( ! isset( $args['toType'] ) ) {
			throw new Error( __( 'The "toType" is required for the ProductAttributes connection.', 'graphql-for-ecommerce' ) );
		}

		return array_merge(
			[
				'fromFieldName'  => 'attributes',
				'connectionArgs' => [],
				'resolve'        => static function ( $source, array $args, AppContext $context, ResolveInfo $info ) {
					$resolver = new Product_Attribute_Connection_Resolver( $source, $args, $context, $info );

					return $resolver->get_connection();
				},
			],
			$args
		);
	}
}