<?php

add_action('wp_ajax_some_ajax_generate_preview', 'some_ajax_generate_preview');
function some_ajax_generate_preview() {

$shortcode = $_REQUEST['shortcode'];
$clean_shortcode = some_ajax_clean_shortcode($_REQUEST['shortcode']);
$type = $_REQUEST['type'];
$post_types = get_option('some_ajax_types');


$error = null;

if(!current_user_can('administrator')) $error = _('Some message!', 'text-domain');
if(!$error && !in_array($type, $post_types)) $error = _('Some message!', 'text-domain');
if(!$error && !shortcode_exists($clean_shortcode)) $error = _('Some message!', 'text-domain');

$message = $error ??  _('Some message!', 'text-domain');

echo json_encode(['status' => (bool) $error,
                  'message' => $message]);


die();

}