<?php

namespace app\admin\model\course;

use think\Model;

use app\admin\model\course\ColumnBind;
class ColumnDir extends Model
{

    
    // 表名
    protected $name = 'course_column_dir';
    
    // 自动写入时间戳字段
    protected $autoWriteTimestamp = 'integer';

    // 定义时间戳字段名
    protected $createTime = 'createtime';
    protected $updateTime = false;
    protected $deleteTime = false;

    // 追加属性
    protected $append = [

    ];
    

    public function course()
    {
        return $this->belongsTo('app\admin\model\Course', 'course_id', 'id', [], 'LEFT')->setEagerlyType(0);
    }

    /**
     * 获取目录列表
     * @param $courseId
     * @return array
     */
    public function courseIdGetList($courseId){
        $parentDir =  $this->selectDir($courseId);
        if(!$parentDir){
            return [];
        }
        foreach ($parentDir as &$child){
            $children = $this->selectDir($courseId,$child['id']);

            if($children){
                $child['children'] = $children;
            }
        }
        return $parentDir;
    }


    /**
     * 查询目录
     * @param $courseId
     * @param $pid
     * @return mixed
     */
    public function selectDir($courseId,$pid = 0){
        $list = self::where(['course_id'=>$courseId,'p_id'=>$pid])->order('sort asc')->select();


        if($list){
            foreach ($list as &$item){
                $item['count'] = ColumnBind::where([
                    'column_id'=>$courseId,
                    'dir'=>$item['id']
                ])->count();
            }
        }
        return $list;
    }

    /**
     * 删除
     * @param $id
     * @return bool
     */
    public function del($id){
        $info = self::where(['id'=>$id])->find();

        if(!$info){
            return false;
        }

        self::where(['id'=>$id])->whereOr(['p_id'=>$id])->delete();

        return true;
    }

    /**
     *  获取排序
     * @return void
     */
    public function defineSort($courseId,$pid){
        $maxItem = self::where([
            'course_id'=>$courseId,
            'p_id'=>$pid
        ])->field("sort")->order("sort desc")->find();

        if(!$maxItem){
            return 0;
        }

        return $maxItem['sort'] + 1;
    }
}