qimall/common/logic/order/marketing/FullReduceMarketing.php

<?php
namespace common\logic\order\marketing;



/**
 * Class FullReduceMarketing
 * 满减计算
 * @Author: lun
 * @DateTime: 2021/9/30 0030 14:53
 * @Copyright: copyright (c) 2021 广东七件事集团
 * @package common\logic\order\marketing
 */
class FullReduceMarketing extends BaseMarketing{
    public function execute($form){}

    /**
     * 满减计算
     * @Author: lun
     * @DateTime: 2021/10/6 0006 10:55
     * @Copyright: copyright (c) 2021 广东七件事集团
     * @param $item
     * @param $form
     * @return mixed
     */
    public static function compute($item, &$form,&$extra = [])
    {
        $full_reduce_money = 0;// 满减金额初始化
        $reduce_money = 0;
        // 遍历商户商品
        foreach($item['goods'] as $goods_id =>$goods){
            // 判断是否开启满额减免 -- 判断是否符合满减条件
            if (isset($form['sku'][$goods['goods_id']]['goods']['extra']['enable_full_reduce']) && $form['sku'][$goods['goods_id']]['goods']['extra']['enable_full_reduce'] == 1 && !empty($form['sku'][$goods['goods_id']]['goods']['extra']['full_reduce_price_limit']) && $goods['goods_price'] >= $form['sku'][$goods['goods_id']]['goods']['extra']['full_reduce_price_limit']){
                $reduce_money = $form['sku'][$goods['goods_id']]['goods']['extra']['full_reduce_money'] ?? 0;// 满减金额
                $full_reduce_money+= $reduce_money;
            }else{  // 当不符合满减条件的时候，这个$reduce_money值就要归零；如果不归零，后面没有满减的商品，都会因此变为满减
                $reduce_money = 0;
            }
            $goods_price = $goods['goods_price'];
            $total_reduce_money = 0;

            foreach($goods['goods_details'] as $k => $goods_detail){

                // 营销赠扣表优惠金额记录
                if ($reduce_money > 0) {
                    // 计算实际付款金额金额，满减金额
                    $pay_money = $item['goods'][$goods_id]['goods_details'][$k]['marketing']['goods_price'] ?? $goods_detail['goods_price'];
                    $temp_reduce_money = bcmul($pay_money/$goods_price,$reduce_money,2);
                    if(!isset($goods['goods_details'][$k+1])){
                        //最后一个
                        $temp_reduce_money = bcsub($reduce_money,$total_reduce_money,2);
                    }

                    $item['goods'][$goods_id]['goods_details'][$k]['marketing']['pay_money']=bcsub($pay_money, $temp_reduce_money, 2);// order_detail实付金额
                    $item['goods'][$goods_id]['goods_details'][$k]['marketing']['full_reduce_money']= $temp_reduce_money;// order_detail实付金额

//                    $item['goods'][$goods_id]['goods_details'][$k]['marketing']['pay_money'] = bcsub($pay_money, $reduce_money, 2);// order_detail实付金额
//                    $item['goods'][$goods_id]['goods_details'][$k]['marketing']['full_reduce_money'] = $reduce_money;// order_detail满减金额
                    $item['goods'][$goods_id]['goods_details'][$k]['goods_price'] -= $temp_reduce_money;// order_detail满减金额
                    $total_reduce_money += $temp_reduce_money;
                }
            }
            $item['goods'][$goods_id]['goods_price'] -= $reduce_money;// order_detail满减金额
        }

        // 满减赋值
        if ($full_reduce_money > 0) {
            $prev_full_reduce = $form->marketing['deduct']['full_reduce']['money'] ?? 0;
            $item['mch_order_info']['pay_money'] -= $full_reduce_money;
            $item['mch_order_info']['goods_price'] -= $full_reduce_money;
            $form->marketing['deduct']['full_reduce'] = ['name' => '满减', 'money' => $prev_full_reduce - $full_reduce_money];
        }
        return $item;
    }
}