124 lines
4.1 KiB
Go
124 lines
4.1 KiB
Go
package order
|
|
|
|
import (
|
|
"context"
|
|
"encoding/json"
|
|
|
|
"github.com/perfect-panel/server/internal/model/order"
|
|
"github.com/perfect-panel/server/pkg/tool"
|
|
|
|
"github.com/perfect-panel/server/pkg/constant"
|
|
|
|
"github.com/perfect-panel/server/internal/model/user"
|
|
"github.com/perfect-panel/server/internal/svc"
|
|
"github.com/perfect-panel/server/internal/types"
|
|
"github.com/perfect-panel/server/pkg/logger"
|
|
"github.com/perfect-panel/server/pkg/xerr"
|
|
"github.com/pkg/errors"
|
|
"gorm.io/gorm"
|
|
)
|
|
|
|
type PreCreateOrderLogic struct {
|
|
logger.Logger
|
|
ctx context.Context
|
|
svcCtx *svc.ServiceContext
|
|
}
|
|
|
|
// Pre create order
|
|
func NewPreCreateOrderLogic(ctx context.Context, svcCtx *svc.ServiceContext) *PreCreateOrderLogic {
|
|
return &PreCreateOrderLogic{
|
|
Logger: logger.WithContext(ctx),
|
|
ctx: ctx,
|
|
svcCtx: svcCtx,
|
|
}
|
|
}
|
|
|
|
func (l *PreCreateOrderLogic) PreCreateOrder(req *types.PurchaseOrderRequest) (resp *types.PreOrderResponse, err error) {
|
|
u, ok := l.ctx.Value(constant.CtxKeyUser).(*user.User)
|
|
if !ok {
|
|
logger.Error("current user is not found in context")
|
|
return nil, errors.Wrapf(xerr.NewErrCode(xerr.InvalidAccess), "Invalid Access")
|
|
}
|
|
// find subscribe plan
|
|
sub, err := l.svcCtx.SubscribeModel.FindOne(l.ctx, req.SubscribeId)
|
|
if err != nil {
|
|
l.Error("[PreCreateOrder] Database query error", logger.Field("error", err.Error()), logger.Field("subscribe_id", req.SubscribeId))
|
|
return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find subscribe error: %v", err.Error())
|
|
}
|
|
var discount float64 = 1
|
|
if sub.Discount != "" {
|
|
var dis []types.SubscribeDiscount
|
|
_ = json.Unmarshal([]byte(sub.Discount), &dis)
|
|
discount = getDiscount(dis, req.Quantity)
|
|
}
|
|
price := sub.UnitPrice * req.Quantity
|
|
amount := int64(float64(price) * discount)
|
|
discountAmount := price - amount
|
|
var coupon int64
|
|
if req.Coupon != "" {
|
|
couponInfo, err := l.svcCtx.CouponModel.FindOneByCode(l.ctx, req.Coupon)
|
|
if err != nil {
|
|
if errors.Is(err, gorm.ErrRecordNotFound) {
|
|
return nil, errors.Wrapf(xerr.NewErrCode(xerr.CouponNotExist), "coupon not found")
|
|
}
|
|
return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find coupon error: %v", err.Error())
|
|
}
|
|
if couponInfo.Count > 0 && couponInfo.Count <= couponInfo.UsedCount {
|
|
return nil, errors.Wrapf(xerr.NewErrCode(xerr.CouponInsufficientUsage), "coupon used")
|
|
}
|
|
couponSub := tool.StringToInt64Slice(couponInfo.Subscribe)
|
|
if len(couponSub) > 0 && !tool.Contains(couponSub, req.SubscribeId) {
|
|
return nil, errors.Wrapf(xerr.NewErrCode(xerr.CouponNotApplicable), "coupon not match")
|
|
}
|
|
var count int64
|
|
err = l.svcCtx.DB.Transaction(func(tx *gorm.DB) error {
|
|
return tx.Model(&order.Order{}).Where("user_id = ? and coupon = ?", u.Id, req.Coupon).Count(&count).Error
|
|
})
|
|
|
|
if err != nil {
|
|
l.Errorw("[Purchase] Database query error", logger.Field("error", err.Error()), logger.Field("user_id", u.Id), logger.Field("coupon", req.Coupon))
|
|
return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find coupon error: %v", err.Error())
|
|
}
|
|
if couponInfo.UserLimit > 0 && count >= couponInfo.UserLimit {
|
|
return nil, errors.Wrapf(xerr.NewErrCode(xerr.CouponInsufficientUsage), "coupon limit exceeded")
|
|
}
|
|
coupon = calculateCoupon(amount, couponInfo)
|
|
}
|
|
amount -= coupon
|
|
|
|
var deductionAmount int64
|
|
// Check user deduction amount
|
|
if u.GiftAmount > 0 {
|
|
if u.GiftAmount >= amount {
|
|
deductionAmount = amount
|
|
amount = 0
|
|
} else {
|
|
deductionAmount = u.GiftAmount
|
|
amount -= u.GiftAmount
|
|
}
|
|
}
|
|
|
|
payment, err := l.svcCtx.PaymentModel.FindOne(l.ctx, req.Payment)
|
|
if err != nil {
|
|
l.Logger.Error("[PreCreateOrder] Database query error", logger.Field("error", err.Error()), logger.Field("payment", req.Payment))
|
|
return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find payment method error: %v", err.Error())
|
|
}
|
|
var feeAmount int64
|
|
// Calculate the handling fee
|
|
if amount > 0 {
|
|
feeAmount = calculateFee(amount, payment)
|
|
}
|
|
amount += feeAmount
|
|
|
|
resp = &types.PreOrderResponse{
|
|
Price: price,
|
|
Amount: amount,
|
|
Discount: discountAmount,
|
|
GiftAmount: deductionAmount,
|
|
Coupon: req.Coupon,
|
|
CouponDiscount: coupon,
|
|
FeeAmount: feeAmount,
|
|
}
|
|
return
|
|
}
|