storj/satellite/payments/stripecoinpayments/coupons.go

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// Copyright (C) 2019 Storj Labs, Inc.
// See LICENSE for copying information.
package stripecoinpayments
import (
"context"
"time"
"github.com/stripe/stripe-go/v72"
"storj.io/common/uuid"
"storj.io/storj/satellite/payments"
)
// ensures that coupons implements payments.Coupons.
var _ payments.Coupons = (*coupons)(nil)
// coupons is an implementation of payments.Coupons.
//
// architecture: Service
type coupons struct {
service *Service
}
// ApplyFreeTierCoupon applies the default free tier coupon to the account.
func (coupons *coupons) ApplyFreeTierCoupon(ctx context.Context, userID uuid.UUID) (_ *payments.Coupon, err error) {
defer mon.Task()(&ctx)(&err)
customerID, err := coupons.service.db.Customers().GetCustomerID(ctx, userID)
if err != nil {
return nil, Error.Wrap(err)
}
customer, err := coupons.service.stripeClient.Customers().Update(customerID, &stripe.CustomerParams{
Coupon: stripe.String(coupons.service.StripeFreeTierCouponID),
})
if err != nil {
return nil, Error.Wrap(err)
}
return coupons.service.stripeDiscountToPaymentsCoupon(customer.Discount)
}
// ApplyCoupon applies the coupon to account if it exists.
func (coupons *coupons) ApplyCoupon(ctx context.Context, userID uuid.UUID, couponID string) (_ *payments.Coupon, err error) {
defer mon.Task()(&ctx)(&err)
customerID, err := coupons.service.db.Customers().GetCustomerID(ctx, userID)
if err != nil {
return nil, Error.Wrap(err)
}
customer, err := coupons.service.stripeClient.Customers().Update(customerID, &stripe.CustomerParams{Coupon: stripe.String(couponID)})
if err != nil {
return nil, Error.Wrap(err)
}
return coupons.service.stripeDiscountToPaymentsCoupon(customer.Discount)
}
// ApplyCouponCode attempts to apply a coupon code to the user via Stripe.
func (coupons *coupons) ApplyCouponCode(ctx context.Context, userID uuid.UUID, couponCode string) (_ *payments.Coupon, err error) {
defer mon.Task()(&ctx, userID, couponCode)(&err)
user, err := coupons.service.usersDB.Get(ctx, userID)
if err != nil {
return nil, Error.Wrap(err)
}
if user.UserAgent != nil {
partner := string(user.UserAgent)
if plan, ok := coupons.service.packagePlans[partner]; ok {
coupon, err := coupons.GetByUserID(ctx, userID)
if err != nil {
return nil, err
}
if coupon != nil && coupon.ID == plan.CouponID {
return nil, payments.ErrCouponConflict.New("coupon for partner '%s' should not be replaced", partner)
}
}
}
promoCodeIter := coupons.service.stripeClient.PromoCodes().List(&stripe.PromotionCodeListParams{
Code: stripe.String(couponCode),
})
if !promoCodeIter.Next() {
return nil, payments.ErrInvalidCoupon.New("Invalid coupon code")
}
promoCode := promoCodeIter.PromotionCode()
customerID, err := coupons.service.db.Customers().GetCustomerID(ctx, userID)
if err != nil {
return nil, Error.Wrap(err)
}
params := &stripe.CustomerParams{
PromotionCode: stripe.String(promoCode.ID),
}
params.AddExpand("discount.promotion_code")
customer, err := coupons.service.stripeClient.Customers().Update(customerID, params)
if err != nil {
return nil, Error.Wrap(err)
}
if customer.Discount == nil || customer.Discount.Coupon == nil {
return nil, Error.New("invalid discount after coupon code application; user ID:%s, customer ID:%s", userID, customerID)
}
return coupons.service.stripeDiscountToPaymentsCoupon(customer.Discount)
}
// GetByUserID returns the coupon applied to the user.
func (coupons *coupons) GetByUserID(ctx context.Context, userID uuid.UUID) (_ *payments.Coupon, err error) {
defer mon.Task()(&ctx, userID)(&err)
customerID, err := coupons.service.db.Customers().GetCustomerID(ctx, userID)
if err != nil {
return nil, Error.Wrap(err)
}
params := &stripe.CustomerParams{}
params.AddExpand("discount.promotion_code")
customer, err := coupons.service.stripeClient.Customers().Get(customerID, params)
if err != nil {
return nil, err
}
if customer.Discount == nil || customer.Discount.Coupon == nil {
return nil, nil
}
return coupons.service.stripeDiscountToPaymentsCoupon(customer.Discount)
}
// stripeDiscountToPaymentsCoupon converts a Stripe discount to a payments.Coupon.
func (service *Service) stripeDiscountToPaymentsCoupon(dc *stripe.Discount) (coupon *payments.Coupon, err error) {
if dc == nil {
return nil, Error.New("discount is nil")
}
if dc.Coupon == nil {
return nil, Error.New("discount.Coupon is nil")
}
var partnered bool
for _, plan := range service.packagePlans {
if plan.CouponID == dc.Coupon.ID {
partnered = true
break
}
}
coupon = &payments.Coupon{
ID: dc.Coupon.ID,
Name: dc.Coupon.Name,
AmountOff: dc.Coupon.AmountOff,
PercentOff: dc.Coupon.PercentOff,
AddedAt: time.Unix(dc.Start, 0),
ExpiresAt: time.Unix(dc.End, 0),
Duration: payments.CouponDuration(dc.Coupon.Duration),
Partnered: partnered,
}
if dc.PromotionCode != nil {
coupon.PromoCode = dc.PromotionCode.Code
}
return coupon, nil
}