<?php
namespace app\admin\controller;

use think\Db;
use think\Exception;

class Banner extends Auth
{

    public function index(){
        if(request()->isAjax()){
            //分页参数
            $length = input('rows',10,'intval');   //每页条数
            $page = input('page',1,'intval');      //第几页
            $start = ($page - 1) * $length;     //分页开始位置
            //排序
            $sortRow = input('sidx','id','trim');      //排序列
            $sort = input('sord','desc','trim');        //排序方式
            $order = $sortRow.' '.$sort;

            $title = input('title','','trim');
            if($title){
                $map[] = ['title','like','%'.$title.'%'];
            }
            $enable = input('enable','','trim');
            if($enable != ''){
                $map[] = ['enable','=',$enable];
            }

            $map[] = ['del','=',0];
            $map= empty($map) ? true: $map;
            //数据查询
            $lists = db('banner')->where($map)->limit($start,$length)->order($order)->select();

            //数据返回
            $totalCount = db('banner')->where($map)->count();
            $totalPage = ceil($totalCount/$length);
            $result['page'] = $page;
            $result['total'] = $totalPage;
            $result['records'] = $totalCount;
            $result['rows'] = $lists;
            return json($result);
        }else{
            return $this->fetch();
        }
    }

    /**
     * 新增/编辑
     */
    public function add($id=0){
        if(request()->isPost()){
            $res = model('Banner')->updates();
            if($res){
                $this->success('操作成功',url('index'));
            }else{
                $this->error(model('Banner')->getError());
            }
        }else{
            if($id){
                $info = db('banner')->where('id',$id)->find();
                $this->assign('info',$info);
            }
            return $this->fetch();
        }
    }

    /**
     * 删除记录
     * @param int $id
     */
    public function del($id=0){
        if(!$id){
            $this->error('参数错误');
        }
        $res = db('banner')->where('id',$id)->setField('del',1);
        if($res){
            $this->success('删除成功');
        }else{
            $this->error('删除失败');
        }
    }

    /**
     * 改变字段值
     * @param int $fv
     * @param string $fn
     * @param int $fv
     */
    public function changeField($id=0,$fn='',$fv=0){
        if(!$fn||!$id){
            $this->error('参数错误');
        }
        $res = db('banner')->where('id',$id)->setField($fn,$fv);
        if($res){
            $this->success('操作成功');
        }else{
            $this->error('操作失败');
        }
    }

    public function batchSort(){
        $data = input('data','','trim');
        if(!$data){
            $this->error('参数错误');
        }
        $data = json_decode($data,true);
        if(!$data){
            $this->error('参数错误');
        }

        Db::startTrans();
        try{
            foreach ($data as $k=>$v){
                Db::name('banner')->where('id',$v['id'])->setField('sort',$v['sort']);
            }

            Db::commit();
        }catch (Exception $e){
            Db::rollback();
            $this->error('操作失败');
        }
        $this->success('操作成功');
    }


}