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checkout.go
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checkout.go
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package donate
import (
"encoding/json"
"fmt"
"github.com/39alpha/api39/api39"
"github.com/kataras/iris/v12"
"github.com/stripe/stripe-go/v72"
"github.com/stripe/stripe-go/v72/checkout/session"
)
type DonationRequest struct {
Currency string `json:"currency"`
Email string `json:"email"`
ProductName string `json:"product"`
UnitAmount float64 `json:"unit_amount"`
}
func ParseDonationRequest(ctx iris.Context) (*DonationRequest, error) {
if ctx.Method() == "POST" {
body, err := ctx.GetBody()
if err != nil {
return nil, err
}
var parsed DonationRequest
if err := json.Unmarshal(body, &parsed); err != nil {
return nil, err
} else {
return &parsed, nil
}
}
return nil, fmt.Errorf("%s requests are not supported", ctx.Method())
}
type CheckoutSessionResponse struct {
SessionId string `json:"id"`
}
func Checkout(ctx iris.Context) {
req, err := ParseDonationRequest(ctx)
if err != nil {
ctx.StopWithProblem(iris.StatusBadRequest, iris.NewProblem().
Title("invalid request").
Type("error").
Detail(err.Error()))
return
}
if req.UnitAmount < 1.0 {
ctx.StopWithProblem(iris.StatusBadRequest, iris.NewProblem().
Title("invalid unit_amount").
Type("amount-too-low"))
return
} else if req.UnitAmount >= 515.24 {
ctx.StopWithProblem(iris.StatusBadRequest, iris.NewProblem().
Title("invalid unit_amount").
Type("amount-too-high"))
return
}
cfg, ok := ctx.Values().Get("config").(*api39.Config)
if !ok {
ctx.StopWithProblem(iris.StatusInternalServerError, iris.NewProblem().
Title("failed to load configuration").
Type("error"))
return
}
stripe.Key = cfg.Stripe.Apikey
params := &stripe.CheckoutSessionParams{
PaymentMethodTypes: stripe.StringSlice([]string{
"card",
}),
CustomerEmail: &req.Email,
SubmitType: stripe.String("donate"),
BillingAddressCollection: stripe.String("required"),
Mode: stripe.String(string(stripe.CheckoutSessionModePayment)),
LineItems: []*stripe.CheckoutSessionLineItemParams{
&stripe.CheckoutSessionLineItemParams{
PriceData: &stripe.CheckoutSessionLineItemPriceDataParams{
Currency: stripe.String(cfg.Stripe.Currency),
ProductData: &stripe.CheckoutSessionLineItemPriceDataProductDataParams{
Name: stripe.String(cfg.Stripe.Product),
},
UnitAmount: stripe.Int64((int64)(100 * req.UnitAmount)),
},
Quantity: stripe.Int64(1),
},
},
SuccessURL: stripe.String(cfg.Stripe.SuccessURL),
CancelURL: stripe.String(cfg.Stripe.CancelURL),
}
session, err := session.New(params)
if err != nil {
ctx.StopWithError(iris.StatusBadRequest, err)
return
}
data := CheckoutSessionResponse{
SessionId: session.ID,
}
_, _ = ctx.JSON(data)
}