LLMS_AJAX

LLMS_AJAX

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File: includes/class.llms.ajax.php

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class LLMS_AJAX {
 
    /**
     * Nonce validation argument
     *
     * @var string
     */
    const NONCE = 'llms-ajax';
 
    /**
     * Hook into ajax events.
     *
     * @since 1.0.0
     * @since 3.16.0 Unknown.
     * @since 4.0.0 Stop registering previously deprecated actions.
     * @since 5.9.0 Move `check_voucher_duplicate()` to `LLMS_AJAX_Handler`.
     * @since 6.0.0 Removed loading of class files that don't instantiate their class in favor of autoloading.
     * @since 7.5.0 Added `favorite_object` ajax event.
     *
     * @return void
     */
    public function __construct() {
 
        $ajax_events = array(
            'query_quiz_questions' => false,
            'favorite_object'      => false,
        );
 
        foreach ( $ajax_events as $ajax_event => $nopriv ) {
            add_action( 'wp_ajax_' . $ajax_event, array( $this, $ajax_event ) );
 
            if ( $nopriv ) {
                add_action( 'wp_ajax_nopriv_' . $ajax_event, array( $this, $ajax_event ) );
            }
        }
 
        self::register();
 
        add_filter( 'heartbeat_received', array( 'LLMS_Admin_Builder', 'heartbeat_received' ), 10, 2 );
    }
 
    /**
     * Register the AJAX handler class with all the appropriate WordPress hooks.
     *
     * @since Unknown
     * @since 4.4.0 Move `register_script()` to script enqueue hook in favor of `wp_loaded`.
     * @since 6.0.0 Removed the `wp_enqueue_scripts` action callback to the deprecated `LLMS_AJAX::register_script()` method.
     *
     * @return void
     */
    public function register() {
 
        $handler = 'LLMS_AJAX';
        $methods = get_class_methods( 'LLMS_AJAX_Handler' );
 
        foreach ( $methods as $method ) {
            add_action( 'wp_ajax_' . $method, array( $handler, 'handle' ) );
            add_action( 'wp_ajax_nopriv_' . $method, array( $handler, 'handle' ) );
        }
 
    }
 
    /**
     * Handles the AJAX request for my plugin.
     *
     * @since Unknown
     *
     * @return void
     */
    public static function handle() {
 
        // Make sure we are getting a valid AJAX request.
        check_ajax_referer( self::NONCE );
 
        $request = $_REQUEST;
 
        $response = call_user_func( 'LLMS_AJAX_Handler::' . $request['action'], $request );
 
        if ( $response instanceof WP_Error ) {
            self::send_error( $response );
        }
 
        wp_send_json_success( $response );
 
        die();
 
    }
 
    public static function scrub_request( $request ) {
 
        foreach ( $request as $key => $value ) {
 
            if ( is_array( $value ) ) {
                $request[ $key ] = self::scrub_request( $value );
            } else {
                $request[ $key ] = llms_clean( $value );
            }
        }
 
        return $request;
 
    }
 
    /**
     * Sends a JSON response with the details of the given error.
     *
     * @param WP_Error $error
     */
    private static function send_error( $error ) {
        wp_send_json(
            array(
                'code'    => $error->get_error_code(),
                'message' => $error->get_error_message(),
            )
        );
    }
 
    /**
     * Retrieve Quiz Questions
     *
     * Used by Select2 AJAX functions to load paginated quiz questions
     * Also allows querying by question title
     *
     * @since Unknown
     * @since 5.9.0 Stop using deprecated `FILTER_SANITIZE_STRING`.
     *
     * @return void
     */
    public function query_quiz_questions() {
 
        // Grab the search term if it exists.
        $term = array_key_exists( 'term', $_REQUEST ) ? llms_filter_input_sanitize_string( INPUT_POST, 'term' ) : '';
        $page = array_key_exists( 'page', $_REQUEST ) ? llms_filter_input( INPUT_POST, 'page', FILTER_SANITIZE_NUMBER_INT ) : 0;
 
        global $wpdb;
 
        $limit = 30;
        $start = $limit * $page;
 
        if ( $term ) {
            $like = " AND post_title LIKE '%s'";
            $vars = array( '%' . $term . '%', $start, $limit );
        } else {
            $like = '';
            $vars = array( $start, $limit );
        }
 
        // phpcs:disable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
 
        $questions = $wpdb->get_results(
            $wpdb->prepare(
                "SELECT ID, post_title
             FROM $wpdb->posts
             WHERE
                    post_type = 'llms_question'
                AND post_status = 'publish'
                $like
             ORDER BY post_title
             LIMIT %d, %d
            ",
                $vars
            )
        );
 
        // phpcs:enable WordPress.DB.PreparedSQL.InterpolatedNotPrepared
 
        $r = array();
        foreach ( $questions as $q ) {
 
            $r[] = array(
                'id'   => $q->ID,
                'name' => $q->post_title . ' (' . $q->ID . ')',
            );
 
        }
 
        echo json_encode(
            array(
                'items'   => $r,
                'more'    => count( $r ) === $limit,
                'success' => true,
            )
        );
 
        wp_die();
 
    }

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Methods Methods

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Changelog Changelog

Changelog
Version Description
6.0.0 Removed deprecated items.
  • LLMS_AJAX::check_voucher_duplicate() method.
  • LLMS_AJAX::get_ajax_data() method.
  • LLMS_AJAX::register_script() method.
4.0.0 Removed previously deprecated ajax actions and related methods.
3.35.0 Unknown.
1.0.0 Introduced.

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