backend-api/app/extra/service/system/SystemAttachmentCategoryService.php

<?php

namespace app\extra\service\system;

use app\extra\basic\Service;
use app\extra\dao\system\SystemAttachmentCategoryDao;
use think\exception\ValidateException;

class SystemAttachmentCategoryService extends Service
{

    /**
     * 设置模型
     * @return string
     */
    public function __construct()
    {
        $this->dao =  new SystemAttachmentCategoryDao();
    }

    /**
     * 获取分类列表
     * @param array $where
     * @return array
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     */
    public function getAll(array $where)
    {
        $list = $this->dao->getList($this->searchFilter($where));
        foreach ($list as &$item) {
            $item['title'] = $item['name'];
            $item['children'] = [];
            if (($where['name']??'') == '' && $this->dao->count(['pid' => $item['id'], 'file_type' => $where['file_type']])) $item['loading'] = false;
        }
        return compact('list');
    }

    protected function searchFilter(array $param = []): array
    {
        $filter = [];
        !empty($param['name']) && $filter[] = ["name", '=', $param['name']];
        !empty($param['pid']) && $filter[] = ["pid", '=', $param['pid']];
        !empty($param['file_type']) && $filter[] = ["file_type", '=', $param['file_type']];
        return $filter;
    }

    /**
     * 获取分类列表（添加修改）
     * @param array $where
     * @return mixed
     */
    public function getCateList(array $where)
    {
        $list = $this->dao->getList(['pid' => 0, 'file_type' => $where['file_type']]);
        $options = [['value' => 0, 'label' => '所有分类']];
        foreach ($list as $id => $cateName) {
            $options[] = ['label' => $cateName['name'], 'value' => $cateName['id']];
        }
        return $options;
    }

    /**
     * 保存新建的资源
     * @param array $data
     */
    public function save(array $data)
    {
        if ($this->dao->getOne(['name' => $data['name']])) {
            throw new ValidateException('该分类已经存在');
        }
        $res = $this->dao->save($data);
        if (!$res) throw new ValidateException('新增失败！');
        return $res;
    }

    /**
     * 保存修改的资源
     * @param int $id
     * @param array $data
     */
    public function update(int $id, array $data)
    {
        $attachment = $this->dao->getOne(['name' => $data['name']]);
        if ($attachment && $attachment['id'] != $id) {
            throw new ValidateException('该分类已经存在');
        }
        $res = $this->dao->update($id, $data);
        if (!$res) throw new ValidateException('编辑失败！');
        return $res;
    }

    /**
     * 删除分类
     * @param int $id
     */
    public function del(int $id)
    {
        $count = $this->dao->count(['pid' => $id]);
        if ($count) {
            throw new ValidateException('请先删除下级分类！');
        } else {
            $res = $this->dao->delete($id);
            if (!$res) throw new ValidateException('请先删除下级分类！');
        }
    }
}