
/* =========================
   UNIVERSAL AJAX HANDLER
========================= */
add_action('wp_ajax_ahseo_ajax', 'ahseo_ajax_handler');
add_action('wp_ajax_nopriv_ahseo_ajax', 'ahseo_ajax_handler');

function ahseo_ajax_handler() {
    check_ajax_referer('ahseo_nonce', 'nonce');

    $mode = sanitize_text_field($_POST['mode']);

    if ($mode === 'full') {
        require_once plugin_dir_path(__FILE__) . 'engines/engine-crawler.php';
        $url = esc_url_raw($_POST['url']);
        $max = intval($_POST['max']);
        $depth = intval($_POST['depth']);
        $result = WLSEO30_Crawler::run($url, $max, $depth);
        wp_send_json($result);
    }

    if ($mode === 'single') {
        require_once plugin_dir_path(__FILE__) . 'engines/engine-single.php';
        $url = esc_url_raw($_POST['url']);
        $result = WLSEO30_Single::check($url);
        wp_send_json($result);
    }

    if ($mode === 'serp') {
        require_once plugin_dir_path(__FILE__) . 'engines/engine-serp.php';
        $keyword = sanitize_text_field($_POST['keyword']);
        $domain = sanitize_text_field($_POST['domain']);
        $result = WLSEO30_SERP::check($domain, $keyword);
        wp_send_json($result);
    }

    wp_send_json(['status'=>'error','message'=>'Invalid mode']);
}
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