getViewed - Сниппет вывода просмотренных товаров для minishop2

gistfile1.php

<?php
$id = $modx->resource->id;
$tpls = explode(',', $modx->getOption('ms2_template_product_default'));

if (!isset($limit)) {$limit = 10;}
if (!isset($tpl)) {$tpl = 'tpl.msProducts.row';}
 
// Вносим ID просмотренных товаров
if (in_array($modx->resource->template, $tpls)) {
    if (!isset($_SESSION['viewed'])) {
        $_SESSION['viewed'] = array($id);
    }
    else {
        if (in_array($id, $_SESSION['viewed'])) {
            $key = array_search($id, $_SESSION['viewed']);
            unset($_SESSION['viewed'][$key]);
        }
 
        if (count($_SESSION['viewed']) > $limit) {
            array_shift($_SESSION['viewed']);
        }
        $_SESSION['viewed'][] = $id;
    }
}
// Если указано действие returnViewed - выводим просмотренные товары
if ($action == 'returnViewed') {
    $ids = array_reverse($_SESSION['viewed']);
    if (empty($ids)) {return;}
 
    $config = array(
         'resources' => '-'.$modx->resource->id.','.implode(',', $ids)
        ,'parents' => -1
        ,'tpl' => $tpl
        ,'limit' => $limit
        ,'element' => 'msProducts'
        ,'includeContent' => 1
    );
    $config = array_merge($config, $scriptProperties);
    
    return $modx->runSnippet('pdoPage', $config);
}