xiaoshan/addons/shopro/controller/activity/Kan.php

<?php

namespace addons\shopro\controller\activity;

use addons\shopro\controller\Common;
use addons\shopro\service\goods\GoodsService;
use addons\shopro\facade\Activity as ActivityFacade;
use think\Db;
class Kan extends Common
{

    protected $noNeedLogin = ['index', 'detail'];
    protected $noNeedRight = ['*'];

    //砍价商品列表
    public function kan_productsku_list(){
        $category_id = $this->request->param('category_id');

        $list = Db::name('shopro_activity_sku_price')->alias('asp')
            ->field([
                    'asp.activity_id','asp.goods_sku_price_id','asp.goods_id','asp.price',
                    'a.rules',
                    'g.title','g.image',
                    'gsp.goods_sku_text','gsp.image as sku_image','gsp.price as old_price']
            )
            ->join('shopro_activity a','asp.activity_id = a.id','LEFT')
            ->join('shopro_goods g'   ,'asp.goods_id    = g.id','LEFT')
            ->join('shopro_goods_sku_price gsp','asp.goods_sku_price_id = gsp.id','LEFT')
            ->where('asp.status','up')
            ->where('a.deletetime',NULL)->where('a.type','kan')
            ->where('g.deletetime',NULL)->whereIn('g.status', ['up', 'hidden'])
            ->where('gsp.status','up');

        if(!empty($category_id)){
            $list->where('find_in_set(:category_ids,g.category_ids)', ['category_ids' => $category_id]);
        }

        $list = $list->order('a.end_time asc')->autopage()->select();
        $list = list_domain_image($list,['image','sku_image']);
        foreach($list as $key => $val){
            //sku图片代替主图
            if(!empty($val['sku_image'])){
                $val['image'] = $val['sku_image'];
            }
            unset($val['sku_image']);

            $val['team_num'] = json_decode($val['rules'],true)['team_num'];//砍价人数上限
            unset($val['rules']);

            $list[$key] = $val;
        }

        $this->success('获取成功',$list);
    }

    //发起砍价
    public function kan_newone(){
        $user = auth_user();
        $nowtime = time();

        $goods_id           = $this->request->param('goods_id');
        $goods_sku_price_id = $this->request->param('goods_sku_price_id');
        $activity_id        = $this->request->param('activity_id');

        //活动
        $activity = Db::name('shopro_activity')->where('type','kan')->where('deletetime',NULL)->where('id',$activity_id)->find();
        if(empty($activity)){
            $this->error('不存在的砍价活动');
        }
        if($activity['end_time'] < time()){
            $this->error('该砍价活动已结束');
        }
        $rules = json_decode($activity['rules'],true);


        //活动商品
        $map_sku = [
            'activity_id'        => $activity_id,
            'goods_id'           => $goods_id,
            'goods_sku_price_id' => $goods_sku_price_id,
            'status'             => 'up',
        ];
        $activity_sku_price = Db::name('shopro_activity_sku_price')->where($map_sku)->find();
        if(empty($activity_sku_price)){
            $this->error('不存在的活动商品');
        }
        if($activity_sku_price['sales'] >= $activity_sku_price['stock']){
            $this->error('该活动商品已售罄');
        }

        //限购
        $map_can = [
            'user_id'            => $user['id'],
            'activity_id'        => $activity_id,
            'goods_id'           => $goods_id,
            'goods_sku_price_id' => $goods_sku_price_id,
            'status'             => ['IN',['ing','finish','finish_fictitious']],
        ];
        $check = Db::name('shopro_activity_kan')->where($map_can)->count();
        if($check >= $rules['limit_num']){
            $this->error('当前活动中此商品限制砍价'.$rules['limit_num'].'次');
        }

        //写入
        $data = [
            'user_id' => $user['id'],
            'goods_id' => $goods_id,
            'goods_sku_price_id' => $goods_sku_price_id,
            'activity_id' => $activity_id,
            'num' => $rules['team_num'],
            'current_num' => 0,
            'status' => 'ing',
            'expire_time' => $nowtime + $rules['valid_time']*3600,
            'finish_time' => 0,
            'createtime' => $nowtime,
            'updatetime' => $nowtime,
            'total_kan_price' => 0,
            'activity_sku_price' => $activity_sku_price['price'],
        ];

        $kan_id = Db::name('shopro_activity_kan')->insertGetId($data);

        $this->success('发起成功',$kan_id);
    }

    //帮好友砍价
    public function kan_kan(){
        $kan_id = $this->request->param('kan_id');
        $kan_id = intval($kan_id);

        //
        $user = auth_user();
        $nowtime = time();

        //一人只能砍一次
        $map_check = [
            'user_id' => $user['id'],
            'kan_id'  => $kan_id,
        ];
        $check = Db::name('shopro_activity_kan_log')->where($map_check)->find();
        if($check){
            $this->error('您已经砍过一次了');
        }

        Db::startTrans();
        //此次砍价
        $kan = Db::name('shopro_activity_kan')->where('id',$kan_id)->lock(true)->find();
        if(empty($kan)){
            Db::rollback();
            $this->error('不存在的砍价活动');
        }
        if($kan['status'] == 'invalid'){
            Db::rollback();
            $this->error('此次砍价已过期,不需要再砍啦!');
        }
        if($kan['status'] != 'ing'){
            Db::rollback();
            $this->error('此次砍价已完成,不需要再砍啦!');
        }
        if($kan['current_num'] >= $kan['num']){
            Db::rollback();
            $this->error('已经达到最高砍价人数,不需要再砍啦!');
        }

        //商品原价
        $goods_sku_price = Db::name('shopro_goods_sku_price')->where('id',$kan['goods_sku_price_id'])->find();

        //总差价 = 商品原价 - 活动低价
        $cha_price = bcsub($goods_sku_price['price'],$kan['activity_sku_price'],2); if($cha_price <= 0){$cha_price = 0;}

        //还能砍的剩余价 = 总差价 - 已经砍掉的价
        $remain_price = bcsub($cha_price,$kan['total_kan_price'],2); if($remain_price <= 0){$remain_price = 0;}

        //本次能砍掉的价格
        $kan_price = 0;
        $is_last = 0;
        if($kan['num'] - $kan['current_num'] == 1){
            //最后一砍
            $kan_price = $remain_price;
            $is_last = 1;
        }else{
            //每次砍价的平均数
            $pingjun_price = bcdiv($cha_price,$kan['num'],2);

            //上下100分钱的浮动
            $min = $pingjun_price*100 - 100; if($min <= 0){$min = 0;}
            $max = $pingjun_price*100 + 100;
            $kan_price = bcdiv(rand($min,$max),100,2);

            //一般最后一次的时候 浮动过大，最后一砍，直接强制结束
            if($kan_price >= $remain_price){
                $kan_price = $remain_price;
                $is_last = 1;
            }
        }

        //日志
        $log_data = [
            'user_id' => $user['id'],
            'nickname' => $user['nickname'],
            'avatar' => $user['avatar'],
            'kan_id' => $kan_id,
            'activity_id' => $kan['activity_id'],
            'kan_price' => $kan_price,
            'createtime' => $nowtime,
            'updatetime' => $nowtime,
        ];
        $log_id = Db::name('shopro_activity_kan_log')->insertGetId($log_data);
        if(!$log_id){
            Db::rollback();
            $this->error('砍价失败了');
        }

        //砍价修改
        $update = [
            'current_num' => $kan['current_num'] + 1,
            'updatetime'  => $nowtime,
            'total_kan_price' => $kan['total_kan_price'] + $kan_price,
        ];
        if($is_last == 1){
            $update['status'] = 'finish';
            $update['finish_time'] = $nowtime;
        };
        $rs_update = Db::name('shopro_activity_kan')->where('id',$kan_id)->update($update);
        if(!$rs_update){
            Db::rollback();
            $this->error('砍价失败了');
        }

        Db::commit();
        $this->success('砍价成功');
    }

    //某个已发起的砍价详情
    public function kan_info(){
        $kan_id          = $this->request->param('kan_id');

        $kan = Db::name('shopro_activity_kan')->alias('kan')
            ->field(['kan.*',
                'g.title','g.image',
                'gsp.goods_sku_text','gsp.image as sku_image','gsp.price as old_price',
                ])
            ->join('shopro_goods g','kan.goods_id = g.id','LEFT')
            ->join('shopro_goods_sku_price gsp','kan.goods_sku_price_id = gsp.id','LEFT')
            ->where('kan.id',$kan_id)
            ->find();

        //砍价记录
        $kan_log = Db::name('shopro_activity_kan_log')->where('kan_id',$kan_id)->order('id asc')->select();

        $result = [
            'activity' => $kan,
            'log'      => $kan_log,
        ];
        $this->success('获取成功',$result);
    }


}