source: elasticpress/trunk/includes/classes/StatusReport/AjaxReport.php

<?php
/**
 * AjaxReport abstract class
 *
 * @package elasticpress
 *
 * @since 5.2.0
 */

namespace ElasticPress\StatusReport;

defined( 'ABSPATH' ) || exit;

/**
 * AjaxReport class
 *
 * @package ElasticPress
 */
abstract class AjaxReport extends Report {
        /**
         * Groups must return empty array in Ajax context. Always
         *
         * @return array
         */
        final public function get_groups(): array {
                return [];
        }

        /**
         * Return the report messages.
         *
         * @return array
         */
        public function get_messages(): array {
                if ( isset( $_POST['action'] ) && 'ep_load_groups' === $_POST['action'] ) { // phpcs:ignore WordPress.Security.NonceVerification
                        return [];
                }

                $messages = [
                        [
                                'type'    => 'warning',
                                'message' => sprintf(
                                        __( 'To see this report, please generate a full report first by clicking the "Generate Full Status Report" button.', 'elasticpress' ),
                                ),
                        ],
                ];

                return $messages;
        }

        /**
         * Return the report groups in an AJAX context
         *
         * @return string
         */
        abstract public function get_groups_ajax(): array;
}