<?php

namespace app\common\service;

use app\common\model\ShopGoodsMenuModel;
use utils\RedisCache;

/**
 * 商品菜单服务 by wes
 * Class ShopGoodsMenuService
 * @package app\common\service
 */
class ShopGoodsMenuService
{
    protected static $instance = null;
    protected $model = null;

    public function __construct()
    {
        $this->model = new ShopGoodsMenuModel();
    }

    /**
     * 静态化入口
     * @return static|null
     */
    public static function make()
    {
        if(!self::$instance){
            self::$instance = new static();
        }

        return self::$instance;
    }

    /**
     * 获取列表
     * @param $map 分组
     * @param $pageSize 分页大小
     * @param $field 返回字段
     * @param $cache 是否缓存数据，默认是
     * @return array|mixed
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\DbException
     * @throws \think\db\exception\ModelNotFoundException
     */
    public function getList($map, $pageSize=10, $field='', $cache=true)
    {
        $page = request()->post('page', 1);
        $cacheKey = "caches:goodsMenu:list_{$page}_{$pageSize}_".md5(json_encode($map, 256).$field);
        $list = RedisCache::get($cacheKey);
        if($list && $cache){
            return $list;
        }

        $where = ['status'=> 1];
        $field = $field? $field : '*';
        $order = isset($map['sort']) && $map['sort']? $map['sort'] : 'sort desc,id asc';
        $list = $this->model->where($where)
            ->field($field)
            ->order($order)
            ->paginate($pageSize);
        $list = $list? $list->toArray():[];
        if($list){
            RedisCache::set($cacheKey, $list, rand(5,10));
        }

        return $list;
    }


}