NN2020042801/app/index/service/CategoryService.php

<?php
/**
 * 品牌分类
 * @author wesmielr
 */
namespace app\index\service;
use think\Db;
class CategoryService
{
    /**
     * 获取首页分类导航列表
     * @param bool $refresh
     * @return array|bool|\PDOStatement|string|\think\Collection
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\ModelNotFoundException
     * @throws \think\exception\DbException
     */
    public static function getCateList($refresh = false){
        $cacheKey ='cache:index:catearr';
        $catearr = RedisService::get($cacheKey);
        if(empty($catearr) || $refresh){
            //一级分类+二级分类
            $catearr = Db::name('category')
                ->where('parent_id',0)
                ->field('id,catname,enname')
                ->order('list_order')
                ->limit(0,12)
                ->select();
            foreach($catearr as $k=>$v){
                $erji_cate = Db::name('category')
                    ->where('parent_id',$v['id'])
                    ->field('id,enname,catname')
                    ->order('list_order')
                    ->limit(0,2)
                    ->select();
                $v['son'] = $erji_cate;

                $xmList = Db::name('jiameng')
                    ->where(['catid|pcatid'=> $v['id'],'status'=> 1])
                    ->field('id,title')
                    ->order('list_order')
                    ->limit(12)
                    ->select();
                $data = $v;
                $data['xmList'] = $xmList;
                $v['sonData'][] = $data;

                // 子类的ID
                foreach ($erji_cate as $val){
                    $xmList = Db::name('jiameng')
                        ->where(['catid|pcatid'=> $val['id'],'status'=> 1])
                        ->field('id,title')
                        ->order('list_order')
                        ->limit(12)
                        ->select();
                    $data = $val;
                    $data['xmList'] = $xmList;
                    $v['sonData'][] = $data;
                }


                $v['son'] = $erji_cate;
                $catearr[$k] = $v;
            }

            if($catearr){
                $catearr = $catearr->toArray();
                RedisService::set($cacheKey, $catearr, 7 * 24 *3600);
            }
        }

        return $catearr;
    }

    /**
     * 获取主分类行业
     * @param int $num 条数
     * @return array|\PDOStatement|string|\think\Collection
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\ModelNotFoundException
     * @throws \think\exception\DbException
     */
    public static function getCates($num=30, $pid=0){
        return Db::name('category')
            ->where('parent_id',$pid)
            ->field('id,catname,enname')
            ->order('list_order')
            ->limit($num)
            ->select();
    }

    /**
     * 获取推荐分类列表以及子类列表
     * @param int $num 主分类
     * @return $this
     * @throws \think\db\exception\DataNotFoundException
     * @throws \think\db\exception\ModelNotFoundException
     * @throws \think\exception\DbException
     */
    public static function getRecCates($num=6){
        return Db::name('category')
            ->where('parent_id',0)
            ->field('id,catname,enname')
            ->order('list_order')
            ->limit($num)
            ->select()
            ->each(function($item, $k){
                $id = isset($item['id'])? intval($item['id']) : 0;
                $item['subList'] = [];
                if($id){
                    $subList = CategoryService::getCates(12, $id);
                    $item['subList'] = $subList? $subList->toArray() : [];
                }
                return $item;
            });
    }
}