Add WooCommerce Order item data to WooCommerce Orders Search in SearchWP

searchwp-customizations.php

<?php

// Add WooCommerce Order item data to WooCommerce Orders Search in SearchWP.
// @link https://searchwp.com/documentation/knowledge-base/search-woocommerce-orders/
add_filter( 'searchwp\entry\data', function( $data, \SearchWP\Entry $entry ) {
	// The Product data keys to index for each Order item.
	$data_to_index = [
		'sku',
		'name',
		'slug',
		'description',
		'short_description',
		'attributes',
	];

	if (
		'post' . SEARCHWP_SEPARATOR . 'shop_order' !== $entry->get_source()->get_name()
		|| ! function_exists( 'wc_get_order' )
		|| ! class_exists( 'WC_Order_Item_Product' )
		|| ! method_exists( 'WC_Order_Item_Product', 'get_product' )
		|| ! class_exists( 'WC_Product' )
		|| ! method_exists( 'WC_Product', 'get_data' )
	) {
		return $data;
	}

	$order = wc_get_order( $entry->get_id() );

	$data['meta']['searchwp_wc_order_item_data'] = array_map( function ( $item ) use ( $data_to_index ) {
		$product      = $item->get_product();
		$product_data = $product->get_data();

		return array_filter( array_map( function( $item_key, $item_value ) use ( $data_to_index ) {
			return in_array( $item_key, $data_to_index ) ? $item_value : '';
		}, array_keys( $product_data ), array_values( $product_data ) ) );
	}, $order->get_items() );
	
	// We need to prevent WooCommerce from excluding the order comments from our query.
	remove_filter( 'comments_clauses', array( 'WC_Comments', 'exclude_order_comments' ) );

	$order_comments = get_comments( array(
		'post_id' => $order->get_id(),
		'orderby' => 'comment_ID',
		'order'   => 'DESC',
		'status'  => 'any',
		'type'    => 'order_note',
	) );

	add_filter( 'comments_clauses', array( 'WC_Comments', 'exclude_order_comments' ) );

	$notes = wp_list_pluck( $order_comments, 'comment_content' );

	$data['meta']['searchwp_wc_order_notes'] = $notes;

	return $data;
}, 20, 2 );

// Prevent WooCommerce from limiting the results to post IDs.
add_filter( 'searchwp\native\args', function( $args, $query ) {
	if (
		is_admin()
		&& is_search()
		&& isset( $_REQUEST['post_type'] )
		&& 'shop_order' == $_REQUEST['post_type']
	) {
		$args['post__in'] = [];
	}
	return $args;

}, 10, 2 );