<?php

/**
 * Description of CategoryHelper
 *
 * @author Ali2Woo Team
 */

namespace AliNext_Lite;;

class CategoryHelper
{
    public function group_categories(array $categories): array
    {
        $ungrouped = array();
        $groups = array();

        foreach ($categories as $cat) {
            if (!isset($cat['id'], $cat['name'])) {
                continue;
            }

            $level = isset($cat['level']) ? intval($cat['level']) : 1;

            if ($level <= 1) {
                $groups[] = array(
                    'id' => $cat['id'],
                    'name' => $cat['name'],
                    'level' => 1,
                    'children' => array(),
                );
            } else {
                $child = array(
                    'id' => $cat['id'],
                    'name' => $cat['name'],
                    'level' => $level,
                );

                if (empty($groups)) {
                    $ungrouped[] = $child;
                } else {
                    $groups[count($groups) - 1]['children'][] = $child;
                }
            }
        }

        return array('ungrouped' => $ungrouped, 'groups' => $groups);
    }
}