238 lines
9.1 KiB
Go
238 lines
9.1 KiB
Go
package order
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import (
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"context"
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commonLogic "github.com/perfect-panel/server/internal/logic/common"
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"github.com/perfect-panel/server/internal/model/order"
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"github.com/perfect-panel/server/pkg/tool"
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"github.com/perfect-panel/server/pkg/constant"
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"github.com/perfect-panel/server/internal/model/user"
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"github.com/perfect-panel/server/internal/svc"
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"github.com/perfect-panel/server/internal/types"
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"github.com/perfect-panel/server/pkg/logger"
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"github.com/perfect-panel/server/pkg/xerr"
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"github.com/pkg/errors"
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"gorm.io/gorm"
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)
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type PreCreateOrderLogic struct {
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logger.Logger
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ctx context.Context
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svcCtx *svc.ServiceContext
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}
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// NewPreCreateOrderLogic creates a new pre-create order logic instance for order preview operations.
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// It initializes the logger with context and sets up the service context for database operations.
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func NewPreCreateOrderLogic(ctx context.Context, svcCtx *svc.ServiceContext) *PreCreateOrderLogic {
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return &PreCreateOrderLogic{
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Logger: logger.WithContext(ctx),
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ctx: ctx,
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svcCtx: svcCtx,
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}
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}
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// PreCreateOrder calculates order pricing preview including discounts, coupons, gift amounts, and fees
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// without actually creating an order. It validates subscription plans, coupons, and payment methods
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// to provide accurate pricing information for the frontend order preview.
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func (l *PreCreateOrderLogic) PreCreateOrder(req *types.PurchaseOrderRequest) (resp *types.PreOrderResponse, err error) {
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u, ok := l.ctx.Value(constant.CtxKeyUser).(*user.User)
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if !ok {
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logger.Error("current user is not found in context")
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.InvalidAccess), "Invalid Access")
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}
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if req.Quantity <= 0 {
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l.Debugf("[PreCreateOrder] Quantity is less than or equal to 0, setting to 1")
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req.Quantity = 1
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}
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entitlement, entErr := commonLogic.ResolveEntitlementUser(l.ctx, l.svcCtx.DB, u.Id)
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if entErr != nil {
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return nil, entErr
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}
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targetSubscribeID := req.SubscribeId
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orderType := uint8(1)
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isSingleModeRenewal := false
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decision, routeErr := commonLogic.ResolvePurchaseRoute(
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l.ctx,
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l.svcCtx.Config.Subscribe.SingleModel,
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entitlement.EffectiveUserID,
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req.SubscribeId,
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l.svcCtx.UserModel.FindSingleModeAnchorSubscribe,
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)
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switch {
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case errors.Is(routeErr, commonLogic.ErrSingleModePlanMismatch):
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.SingleSubscribePlanMismatch), "single subscribe mode plan mismatch")
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case errors.Is(routeErr, gorm.ErrRecordNotFound):
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case routeErr != nil:
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l.Errorw("[PreCreateOrder] Database query error", logger.Field("error", routeErr.Error()), logger.Field("user_id", u.Id))
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find single mode anchor subscribe error: %v", routeErr.Error())
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case decision != nil:
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targetSubscribeID = decision.ResolvedSubscribeID
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isSingleModeRenewal = decision.Route == commonLogic.PurchaseRoutePurchaseToRenewal
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if isSingleModeRenewal && decision.Anchor != nil {
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orderType = 2
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l.Infow("[PreCreateOrder] single mode purchase routed to renewal preview",
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logger.Field("mode", "single"),
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logger.Field("route", "purchase_to_renewal"),
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logger.Field("anchor_user_subscribe_id", decision.Anchor.Id),
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logger.Field("user_id", u.Id),
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logger.Field("effective_user_id", entitlement.EffectiveUserID),
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)
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}
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}
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// Keep promo eligibility preview aligned with Purchase: an existing paid subscription
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// routes the request to renewal semantics, where first-purchase promos are disabled.
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if !l.svcCtx.Config.Subscribe.SingleModel && orderType == 1 {
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var existSub user.Subscribe
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if e := paidSubscriptionQuery(l.ctx, l.svcCtx.DB, entitlement.EffectiveUserID).
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First(&existSub).Error; e == nil && existSub.Id > 0 {
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orderType = 2
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l.Infow("[PreCreateOrder] purchase preview routed to renewal because an existing subscription was found",
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logger.Field("route_mode", "global_single_subscription"),
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logger.Field("route", "purchase_to_existing_subscription"),
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logger.Field("existing_subscribe_id", existSub.Id),
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logger.Field("existing_status", existSub.Status),
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logger.Field("user_id", u.Id),
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logger.Field("effective_user_id", entitlement.EffectiveUserID),
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logger.Field("resolved_subscribe_id", targetSubscribeID),
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)
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} else if e != nil && !errors.Is(e, gorm.ErrRecordNotFound) {
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l.Errorw("[PreCreateOrder] Database query error", logger.Field("error", e.Error()), logger.Field("user_id", u.Id))
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find existing subscription error: %v", e.Error())
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}
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}
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// find subscribe plan
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sub, err := l.svcCtx.SubscribeModel.FindOne(l.ctx, targetSubscribeID)
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if err != nil {
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l.Errorw("[PreCreateOrder] Database query error", logger.Field("error", err.Error()), logger.Field("subscribe_id", targetSubscribeID))
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find subscribe error: %v", err.Error())
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}
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// check subscribe plan quota limit for new purchase flow only
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if !isSingleModeRenewal && sub.Quota > 0 {
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userSub, err := l.svcCtx.UserModel.QueryUserSubscribe(l.ctx, entitlement.EffectiveUserID)
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if err != nil {
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l.Errorw("[PreCreateOrder] Database query error", logger.Field("error", err.Error()), logger.Field("user_id", u.Id))
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find user subscription error: %v", err.Error())
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}
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var count int64
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for _, v := range userSub {
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if v.SubscribeId == targetSubscribeID {
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count++
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}
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}
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if count >= sub.Quota {
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.SubscribeQuotaLimit), "quota limit")
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}
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}
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newUserDiscount, err := resolveNewUserDiscountEligibility(l.ctx, l.svcCtx.DB, entitlement.EffectiveUserID, targetSubscribeID, req.Quantity, sub.Discount)
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if err != nil {
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l.Errorw("[PreCreateOrder] Database query error resolving new user eligibility",
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logger.Field("error", err.Error()),
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logger.Field("user_id", u.Id),
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)
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return nil, err
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}
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if !isSingleModeRenewal && newUserDiscount.NewUserOnly && !newUserDiscount.WithinWindow {
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.SubscribeNewUserOnly), "not a new user")
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}
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priceResult, err := calculatePurchasePrice(
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l.ctx,
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l.svcCtx,
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entitlement.EffectiveUserID,
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targetSubscribeID,
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sub.UnitPrice,
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req.Quantity,
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newUserDiscount.Discounts,
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newUserDiscount.EligibleForDiscount,
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orderType == 1,
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)
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if err != nil {
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l.Errorw("[PreCreateOrder] Promo price calculation error",
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logger.Field("error", err.Error()),
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logger.Field("user_id", u.Id),
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logger.Field("subscribe_id", targetSubscribeID),
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)
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return nil, err
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}
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price := priceResult.OriginalPrice
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amount := priceResult.PayableBase
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discountAmount := priceResult.DiscountAmount
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var couponAmount int64
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if req.Coupon != "" {
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couponInfo, err := l.svcCtx.CouponModel.FindOneByCode(l.ctx, req.Coupon)
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if err != nil {
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if errors.Is(err, gorm.ErrRecordNotFound) {
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.CouponNotExist), "coupon not found")
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}
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find coupon error: %v", err.Error())
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}
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if couponInfo.Count > 0 && couponInfo.Count <= couponInfo.UsedCount {
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.CouponAlreadyUsed), "coupon used")
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}
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var count int64
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err = l.svcCtx.DB.Transaction(func(tx *gorm.DB) error {
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return tx.Model(&order.Order{}).Where("user_id = ? and coupon = ?", u.Id, req.Coupon).Count(&count).Error
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})
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if err != nil {
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l.Errorw("[PreCreateOrder] Database query error", logger.Field("error", err.Error()), logger.Field("user_id", u.Id), logger.Field("coupon", req.Coupon))
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find coupon error: %v", err.Error())
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}
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if couponInfo.UserLimit > 0 && count >= couponInfo.UserLimit {
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.CouponInsufficientUsage), "coupon limit exceeded")
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}
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couponSub := tool.StringToInt64Slice(couponInfo.Subscribe)
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if len(couponSub) > 0 && !tool.Contains(couponSub, targetSubscribeID) {
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.CouponNotApplicable), "coupon not match")
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}
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couponAmount = calculateCoupon(amount, couponInfo)
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}
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amount -= couponAmount
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var feeAmount int64
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if req.Payment != 0 {
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payment, err := l.svcCtx.PaymentModel.FindOne(l.ctx, req.Payment)
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if err != nil {
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l.Errorw("[PreCreateOrder] Database query error", logger.Field("error", err.Error()), logger.Field("payment", req.Payment))
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return nil, errors.Wrapf(xerr.NewErrCode(xerr.DatabaseQueryError), "find payment method error: %v", err.Error())
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}
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// Calculate the handling fee
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if amount > 0 {
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feeAmount = calculateFee(amount, payment)
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amount += feeAmount
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}
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}
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// Calculate gift amount deduction after fee calculation
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var deductionAmount int64
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if u.GiftAmount > 0 && amount > 0 {
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if u.GiftAmount >= amount {
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deductionAmount = amount
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amount = 0
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} else {
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deductionAmount = u.GiftAmount
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amount -= u.GiftAmount
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}
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}
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resp = &types.PreOrderResponse{
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Price: price,
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Amount: amount,
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Discount: discountAmount,
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PromoDiscount: priceResult.PromoDiscount,
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GiftAmount: deductionAmount,
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Coupon: req.Coupon,
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CouponDiscount: couponAmount,
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FeeAmount: feeAmount,
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}
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return
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}
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