From 6364bedb299d2b5f9660a3063156afa1765928b9 Mon Sep 17 00:00:00 2001
From: Joerg Lehmann <joerg.lehmann@nbit.ch>
Date: Fri, 3 Feb 2023 17:25:51 +0100
Subject: [PATCH] new version with new stripe functionality

---
 stripe.go | 37 +++++++++++++++++++++++++++++++++++--
 1 file changed, 35 insertions(+), 2 deletions(-)

diff --git a/stripe.go b/stripe.go
index 4a4a826..92eea94 100644
--- a/stripe.go
+++ b/stripe.go
@@ -3,8 +3,9 @@ package main
 import (
 	"encoding/json"
 	"fmt"
-	"github.com/stripe/stripe-go/v72"
-	"github.com/stripe/stripe-go/v72/paymentintent"
+	"github.com/stripe/stripe-go/v74"
+	"github.com/stripe/stripe-go/v74/customer"
+	"github.com/stripe/stripe-go/v74/paymentintent"
 	"io/ioutil"
 	"log"
 	"net/http"
@@ -21,6 +22,33 @@ func getStripePK() string {
 	return os.Getenv("STRIPE_PK")
 }
 
+func getCustomerid(name string) string {
+	// if customer does not already exist, create it...
+	var cid = ""
+	params := &stripe.CustomerSearchParams{}
+	params.Query = *stripe.String("name:'" + name + "'")
+	customers := customer.Search(params)
+	for customers.Next() {
+		fmt.Printf("%s\n", customers.Current().(*stripe.Customer).ID)
+		cid = customers.Current().(*stripe.Customer).ID
+	}
+
+	if cid == "" {
+		// create new customer
+		paramsc := &stripe.CustomerParams{
+			Name: stripe.String(name),
+		}
+
+		customer, err := customer.New(paramsc)
+		if err != nil {
+			log.Println("Error Creating Customer: " + name)
+		}
+		cid = customer.ID
+	}
+
+	return cid
+}
+
 func getstripepaymentintentHandler(response http.ResponseWriter, request *http.Request) {
 	name := getUserName(request)
 	if name != "" {
@@ -51,7 +79,12 @@ func getstripepaymentintentHandler(response http.ResponseWriter, request *http.R
 
 		stripe.Key = getStripeKey()
 
+		// if customer does not already exist, create it...
+		customerid := getCustomerid(name)
+
+		// define payment
 		params := &stripe.PaymentIntentParams{
+			Customer:     stripe.String(customerid),
 			Amount:       stripe.Int64(abo_amount),
 			Currency:     stripe.String(string(stripe.CurrencyCHF)),
 			ReceiptEmail: stripe.String(name),