From 4c064240d1f572d8278a20d6704a9175eff29e96 Mon Sep 17 00:00:00 2001
From: Joerg Lehmann <joerg.lehmann@nbit.ch>
Date: Fri, 3 Jan 2020 19:33:39 +0100
Subject: [PATCH] refactor payment process - second step

---
 main.go              |   2 -
 snippets/scales.html |  91 +++++++++++++++++++++-------------
 stripe.go            | 115 -------------------------------------------
 3 files changed, 56 insertions(+), 152 deletions(-)

diff --git a/main.go b/main.go
index b6d07f6..cd762e7 100644
--- a/main.go
+++ b/main.go
@@ -88,9 +88,7 @@ func main() {
         http.HandleFunc("/metrics", metricsHandler)
         http.HandleFunc("/lastmetrics", lastmetricsHandler)
         http.HandleFunc("/save_scale_settings", save_scale_settingsHandler)
-        http.HandleFunc("/getstripesession", getstripesessionHandler)
         http.HandleFunc("/getstripepaymentintent", getstripepaymentintentHandler)
-        http.HandleFunc("/stripewebhook", stripeWebhookHandler)
 
 	logit("Starting Web Application...")
 	http.ListenAndServe("127.0.0.1:4000", nil)
diff --git a/snippets/scales.html b/snippets/scales.html
index ab0376e..899eff5 100644
--- a/snippets/scales.html
+++ b/snippets/scales.html
@@ -69,7 +69,10 @@ Device ID: <span id="deveui"></span>
         </div>
         
         <!-- We'll put the error messages in this element -->
-        <div id="card-errors" role="alert"></div>
+        <article class="message is-danger has-margin-top-20" id="card-errors-article" role="alert">
+          <div class="message-body" id="card-errors">
+          </div>
+        </article>
       </div>
     </section>
     <footer class="modal-card-foot">
@@ -350,7 +353,7 @@ $("#modal-save").click(function() {
 // Set your publishable key: remember to change this to your live publishable key in production
 // See your keys here: https://dashboard.stripe.com/account/apikeys
 var stripe = Stripe('pk_test_YkSGqH3Tk9WKK9HrlY63GhAg');
-var elements = stripe.elements();
+var elements = stripe.elements({ locale: "de" });
 
 // Set up Stripe.js and Elements to use in checkout form
 var style = {
@@ -361,47 +364,20 @@ var style = {
 
 var card = elements.create("card", { style: style });
 card.mount("#card-element");
+$("#card-errors-article").hide();
 
 
 card.addEventListener('change', ({error}) => {
-  const displayError = document.getElementById('card-errors');
   if (error) {
-    displayError.textContent = error.message;
+    $("#card-errors").text(error.message);
+    $("#card-errors-article").show();
   } else {
-    displayError.textContent = '';
+    $("#card-errors").text("");
+    $("#card-errors-article").hide();
   }
 });
 
-
-function GetClientSecret() {
-  var result = "";
-  $.ajax({
-    async: false,
-    url: "getstripepaymentintent",
-    type: "get", //send it through get method
-    dataType: "json",
-    data: { 
-      charge_data: $("#charge_data").html()
-    },
-    success: function(response) {
-      console.log('pay success');
-      console.log(response.stripesessionid);
-      console.log('rc: '+response.rc);
-      if (response.rc == 0) {
-        result = response.stripeclientsecret;
-      }
-    },
-    error: function(xhr) {
-      console.log('getstripepaymentintent error');
-      //Do Something to handle error
-    }
-  });
-
-  return result;
-}
-
-$('#cart-pay').on('click', function(ev) {
-  var clientSecret = GetClientSecret();
+function ConfirmPayment(clientSecret) {
   stripe.confirmCardPayment(clientSecret, {
     payment_method: {
       card: card,
@@ -413,6 +389,10 @@ $('#cart-pay').on('click', function(ev) {
     if (result.error) {
       // Show error to your customer (e.g., insufficient funds)
       console.log(result.error.message);
+      $('#card-errors').text(result.error.message);
+      $('#card-errors-article').show();
+      //Do Something to handle error
+      EndPaymentProgress();
     } else {
       // The payment has been processed!
       if (result.paymentIntent.status === 'succeeded') {
@@ -422,10 +402,51 @@ $('#cart-pay').on('click', function(ev) {
         // payment_intent.succeeded event that handles any business critical
         // post-payment actions.
         console.log("Payment succeeded!!!");
+        $('#card-errors').text("");
+        $('#card-errors-article').hide();
         $("#cart").removeClass("is-active");
+        EndPaymentProgress();
       }
     }
   });
+}
+
+function StartPaymentProgress() {
+  $("#cart-pay").attr("disabled", true).addClass("is-loading");
+  $("#cart-close").attr("disabled", true);
+}
+
+function EndPaymentProgress() {
+  $("#cart-pay").attr("disabled", false).removeClass("is-loading");
+  $("#cart-close").attr("disabled", false);
+}
+
+function PayMe() {
+  $.ajax({
+    url: "getstripepaymentintent",
+    type: "get", //send it through get method
+    dataType: "json",
+    data: { 
+      charge_data: $("#charge_data").html()
+    },
+    success: function(response) {
+      console.log('pay success');
+      console.log('rc: '+response.rc);
+      if (response.rc == 0) {
+        ConfirmPayment(response.stripeclientsecret);
+      }
+    },
+    error: function(xhr) {
+      console.log('getstripepaymentintent error');
+      //Do Something to handle error
+      EndPaymentProgress();
+    }
+  });
+}
+
+$('#cart-pay').on('click', function(ev) {
+  StartPaymentProgress();
+  PayMe();
 });
 </script>
 
diff --git a/stripe.go b/stripe.go
index ea81f46..b8bc3f6 100644
--- a/stripe.go
+++ b/stripe.go
@@ -3,16 +3,11 @@ package main
 import (
     "fmt"
     "log"
-    "os"
-    "io/ioutil"
-    "encoding/json"
     "net/http"
     "strings"
     "strconv"
     "github.com/stripe/stripe-go"
-    "github.com/stripe/stripe-go/checkout/session"
     "github.com/stripe/stripe-go/paymentintent"
-    "github.com/stripe/stripe-go/webhook"
 )
 
 func getStripeKey() string {
@@ -64,113 +59,3 @@ func getstripepaymentintentHandler(response http.ResponseWriter, request *http.R
 	   fmt.Fprintf(response, "{ \"rc\": 6, \"msg\": \"Only available for logged in users\" }")
         }
 }
-
-func getstripesessionHandler(response http.ResponseWriter, request *http.Request) {
-        name := getUserName(request)
-        if name  != "" {
-
-           charge_data, ok := request.URL.Query()["charge_data"]
-           if !ok || len(charge_data[0]) < 1 {
-             log.Println("Url Param 'charge_data' is missing")
-	     fmt.Fprintf(response, "{ \"rc\": 1, \"msg\": \"charge_data must be specified in URL\" }")
-             return
-           }
-
-           scales := strings.Split(charge_data[0],",")
-
-           var abo_years = 0
-           var items []string
-           for _,scale := range scales {
-		items = strings.Split(scale,":")
-                if (len(items) == 2) {
-                  abo_count, err := strconv.Atoi(items[1])
-                  if err == nil {
-                    abo_years += abo_count
-                  }
-                }
-	   }
-           abo_amount := int64(abo_years * 2400)
-
-           stripe.Key = getStripeKey()
-
-	   params := &stripe.CheckoutSessionParams{
-	    	PaymentMethodTypes: stripe.StringSlice([]string{
-   			"card",
-   		}),
-                ClientReferenceID: stripe.String(charge_data[0]),
-                CustomerEmail: stripe.String(name),
-                Locale: stripe.String("de"),
-		LineItems: []*stripe.CheckoutSessionLineItemParams{
-			&stripe.CheckoutSessionLineItemParams{
-				Name:        stripe.String("Jahresabos mini-beieli.ch"),
-				Description: stripe.String("Blablabla Description"),
-				Amount:      stripe.Int64(abo_amount),
-				Currency:    stripe.String(string(stripe.CurrencyCHF)),
-				Quantity:    stripe.Int64(1),
-			},
-		},
-		SuccessURL: stripe.String("https://mini-beieli.ch/payment_received.html"),
-		CancelURL:  stripe.String("https://mini-beieli.ch/payment_cancelled.html"),
-	    }
-
-	    session, err := session.New(params)
-            if err != nil {
-              fmt.Fprintf(response,"{ \"rc\": 5, \"stripesessionid\": \"%s\" }\n","ERROR") 
-            } else {
-              fmt.Fprintf(response,"{ \"rc\": 0, \"stripesessionid\": \"%s\" }\n",session.ID ) 
-            }
-
-        } else {
-	   fmt.Fprintf(response, "{ \"rc\": 6, \"msg\": \"Only available for logged in users\" }")
-        }
-}
-
-func stripeWebhookHandler(response http.ResponseWriter, request *http.Request) {
-    body, err := ioutil.ReadAll(request.Body)
-    if err != nil {
-        fmt.Fprintf(os.Stderr, "Error reading request body: %v\n", err)
-        response.WriteHeader(http.StatusServiceUnavailable)
-        return
-    }
-
-    // Pass the request body & Stripe-Signature header to ConstructEvent, along with the webhook signing key
-    // You can find your endpoint's secret in your webhook settings
-    endpointSecret := "whsec_b1OdRuu9aK6zXt6M1EQRxZ4lhl3rrVtN";
-    event, err := webhook.ConstructEvent(body, request.Header.Get("Stripe-Signature"), endpointSecret)
-
-    if err != nil {
-        fmt.Fprintf(os.Stderr, "Error verifying webhook signature: %v\n", err)
-        response.WriteHeader(http.StatusBadRequest) // Return a 400 error on a bad signature
-        return
-    }
-
-    // Handle the checkout.session.completed event
-    if event.Type == "checkout.session.completed" {
-        var session stripe.CheckoutSession
-        err := json.Unmarshal(event.Data.Raw, &session)
-        if err != nil {
-            fmt.Fprintf(os.Stderr, "Error parsing webhook JSON: %v\n", err)
-            response.WriteHeader(http.StatusBadRequest)
-            return
-        }
-
-        // Fulfill the purchase...
-        //handleCheckoutSession(session)
-        scales := strings.Split(session.ClientReferenceID,",")
-        var items []string
-        for _,scale := range scales {
-	  items = strings.Split(scale,":")
-          if (len(items) == 2) {
-            abo_count, err := strconv.Atoi(items[1])
-            if err == nil {
-              _,_ = prolongActivation(items[0],abo_count)
-            }
-          }
-	}
-        log.Println("handleCheckoutSession "+session.ID)
-        log.Println("handleCheckoutSession "+session.ClientReferenceID)
-    }
-
-    response.WriteHeader(http.StatusOK)
-}
-