screen/application/common/service/OrderService.php

<?php
namespace app\common\service;

use app\common\model\GoodsCart;
use app\common\model\GoodsSku;
use app\common\model\User;
use app\common\validate\KillService;

class OrderService extends BaseService {
    /** @var User */
    protected $user;
    protected $coupon_use;
    protected $coupon_id;
    /** @var 1直接购买2购物车买 */
    protected $frm;
    protected $goods=[];
    protected $cartSkuIds=null;
    protected $submit=false;
    protected $clearCart=false;

    /**
     * @param User $user
     */
    public function setUser(User $user)
    {
        $this->user = $user;
    }

    /**
     * @param $cartSkuIds
     */
    public function setCartSkuIds($cartSkuIds): void
    {
        $this->cartSkuIds = $cartSkuIds;
    }

    /**
     * @param bool $submit
     */
    public function setSubmit(bool $submit): void
    {
        $this->submit = $submit;
    }

    /**
     * @param bool $clearCart
     */
    public function setClearCart(bool $clearCart): void
    {
        $this->clearCart = $clearCart;
    }

    /**
     * @return bool
     */
    public function isClearCart(): bool
    {
        return $this->clearCart;
    }

    /**
     * @return bool
     */
    public function isSubmit(): bool
    {
        return $this->submit;
    }

    /**
     * @return User
     */
    public function getUser(): User
    {
        return $this->user;
    }

    /**
     * @param array $goods
     */
    public function setGoods(array $goods): void
    {
        $this->goods = $goods;
    }

    /**
     * @param mixed $frm
     */
    public function setFrm($frm): void
    {
        $this->frm = $frm;
    }
    /**
     * @param mixed $coupon_use
     */
    public function setCouponUse($coupon_use): void
    {
        $this->coupon_use = $coupon_use;
    }

    /**
     * @param mixed $coupon_id
     */
    public function setCouponId($coupon_id): void
    {
        $this->coupon_id = $coupon_id;
    }

    /**
     * @return array
     */
    public function getGoods()
    {
        if($this->frm==1) {
            $goods=$this->goods;
            $newGoods=[];
            foreach ($goods as $sku_id=>$info){
                $sku=GoodsSku::with(['goods'])->find($sku_id);
                if(!$sku||!$sku->goods){
                    $this->error('规格或商品不存在');
                }
                $temp=[];
                $temp['num']=$info['num'];
                $temp['num_install']=$info['num_install'];
                $temp['sku']=$sku;
                $temp['goods']=$sku->goods;
                $temp['goods_id']=$sku['goods_id'];
                $temp['goods_sku_id']=$sku['id'];
                $newGoods[]=$temp;
            }
            return $newGoods;
        }else{
            $map=[];
            if(!is_null($this->cartSkuIds)){
                if(is_array($this->cartSkuIds) && empty($this->cartSkuIds)){
                    return [];
                }else{
                    $map['goods_sku_id']=['in',$this->cartSkuIds];
                }
            }
            return $this->getUser()->cart()
                ->where($map)
                ->with(['goods','sku'])
                ->select()->toArray();
        }
    }

    public function calculate(){
        $info=[
            'amount_total'=>0,
            'amount_pay'=>0,
            'amount_coupon'=>0,
            'amount_coupon_kill'=>0,
            'amount_install'=>0,
            'amount_discount'=>0,
            'num'=>0,
            'num_install'=>0,
            'goods'=>[]
        ];
        $user=$this->getUser();

        $info['goods']=$this->getGoods();
        #提交订单操作
        $skuIds=[];
        if($this->isSubmit()) {
            foreach ($info['goods'] as $goods) {
                $sku = GoodsSku::lock(true)->find($goods['sku']['id']);
                $sku['num_sell']=$sku['num_sell']+$goods['num'];
                if($sku['num_sell']>$sku['num_stock']){
                    $this->error('库存不足');
                }
                $sku->save();
                $skuIds[]=$goods['sku']['id'];
            }
        }
        $info['num']=array_sum(array_column($info['goods'],'num'));
        $info['num_install']=array_sum(array_column($info['goods'],'num_install'));

        $injectCoupon=false;
        foreach ($info['goods'] as &$goods){
            list($amountReal,$amountKill,$amountOrigin)=$this->getAmount($goods['sku'],$goods['goods']);
            $goods['amount_pay']=0;
            $goods['amount_coupon']=0;

            $goods['amount_goods']=$goods['amount_goods_real']=bcmul($amountReal,$goods['num']);
            $goods['amount_total']=bcmul($amountOrigin,$goods['num']);
            $goods['amount_coupon_kill']=bcmul($amountKill,$goods['num']);
            $goods['amount_install']=InstallService::getFee([$goods['sku']['id']=>$goods]);

            if(!empty($this->coupon_use) && !$injectCoupon){
                $coupon=$user->coupon()->lock($this->isSubmit())->findOrFail($this->coupon_id);
                if($coupon->canUse($goods['amount_goods'],$goods['goods_id'])){
                    $couponAmount=$coupon['amount'];
                    $goods['coupon_id']=$coupon['id'];
                    $goods['amount_coupon']=$couponAmount;
                    $goods['amount_goods_real']=bcadd($goods['amount_goods_real'],-$couponAmount);
                    if($this->isSubmit()){
                        $coupon->setUse();
                    }
                    $injectCoupon=true;
                }
            }

            $goods['amount_total']=bcadd($goods['amount_total'],$goods['amount_install']);
            $goods['amount_pay']=bcAddAll($goods['amount_goods_real'],$goods['amount_install']);

            $info['amount_pay']=bcadd($info['amount_pay'],$goods['amount_pay']);
            $info['amount_total']=bcadd($info['amount_total'],$goods['amount_total']);
            $info['amount_coupon']=bcadd($info['amount_coupon'],$goods['amount_coupon']);
            $info['amount_coupon_kill']=bcadd($info['amount_coupon_kill'],$goods['amount_coupon_kill']);
            $info['amount_install']=bcadd($info['amount_install'],$goods['amount_install']);
        }
        if($this->coupon_use && !$injectCoupon){
            $this->error('优惠券不符合使用规则');
        }

        $info['amount_discount']=bcAddAll($info['amount_discount'],$info['amount_coupon'],$info['amount_coupon_kill']);

        #删除购物车
        if($this->isClearCart()){
            $this->getUser()
                ->cart()
                ->whereIn('goods_sku_id',$skuIds)
                ->delete();
        }

        return $info;
    }

    protected function getAmount($sku,$goods){
        $amountArr=[0,0,$sku['amount']];
        if(KillService::open() && $goods['is_kill']){
            $amountArr[0]=$sku['amount_kill'];
            $amountArr[1]=bcsub($sku['amount'],$sku['amount_kill']);
        }else{
            $amountArr[0]=$sku['amount'];
        }
        return $amountArr;
    }
}