src/Biz/Taxonomy/Service/Impl/CategoryServiceImpl.php

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<?php

namespace Biz\Taxonomy\Service\Impl;

use Biz\BaseService;
use Biz\Common\CommonException;
use Biz\System\Service\LogService;
use Biz\System\Service\SettingService;
use Biz\Taxonomy\CategoryException;
use Biz\Taxonomy\Service\CategoryService;
use Biz\Taxonomy\Dao\CategoryDao;
use Biz\Taxonomy\Dao\CategoryGroupDao;
use AppBundle\Common\ArrayToolkit;
use AppBundle\Common\TreeToolkit;

class CategoryServiceImpl extends BaseService implements CategoryService
{
    public function findCategoriesByGroupIdAndParentId($groupId, $parentId)
    {
        if (!isset($groupId) || !isset($parentId) || $groupId < 0 || $parentId < 0) {
            return array();
        }

        return $this->getCategoryDao()->findByGroupIdAndParentId($groupId, $parentId);
    }

    public function getCategory($id)
    {
        if (empty($id)) {
            return null;
        }

        return $this->getCategoryDao()->get($id);
    }

    public function getCategoryByCode($code)
    {
        return $this->getCategoryDao()->getByCode($code);
    }

    public function getCategoryTree($groupId)
    {
        $group = $this->getGroup($groupId);

        if (empty($group)) {
            $this->createNewException(CategoryException::NOTFOUND_GROUP());
        }

        $prepare = function ($categories) {
            $prepared = array();

            foreach ($categories as $category) {
                if (!isset($prepared[$category['parentId']])) {
                    $prepared[$category['parentId']] = array();
                }

                $prepared[$category['parentId']][] = $category;
            }

            return $prepared;