refactor/checkout (#8)

Co-authored-by: matst80 <mats.tornberg@gmail.com> Reviewed-on: #8 Co-authored-by: Mats Törnberg <mats@tornberg.me> Co-committed-by: Mats Törnberg <mats@tornberg.me>
2025-12-03 09:45:48 +01:00
parent ebd1508294
commit ee5f54f0dd
77 changed files with 5190 additions and 5795 deletions
--- a/cmd/checkout/klarna-handlers.go
+++ b/cmd/checkout/klarna-handlers.go
@@ -0,0 +1,242 @@
+package main
+
+import (
+	"context"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"time"
+
+	"git.k6n.net/go-cart-actor/pkg/cart"
+	"git.k6n.net/go-cart-actor/pkg/checkout"
+	messages "git.k6n.net/go-cart-actor/proto/checkout"
+	"github.com/matst80/go-redis-inventory/pkg/inventory"
+)
+
+/*
+ *
+ *
+ * s.CheckoutHandler(func(order *CheckoutOrder, w http.ResponseWriter) error {
+		w.Header().Set("Content-Type", "text/html; charset=utf-8")
+		w.Header().Set("Permissions-Policy", "payment=(self \"https://js.stripe.com\" \"https://m.stripe.network\" \"https://js.playground.kustom.co\")")
+		w.WriteHeader(http.StatusOK)
+		_, err := fmt.Fprintf(w, tpl, order.HTMLSnippet)
+		return err
+	})
+*/
+
+func (s *CheckoutPoolServer) KlarnaHtmlCheckoutHandler(w http.ResponseWriter, r *http.Request, checkoutId checkout.CheckoutId) error {
+
+	orderId := r.URL.Query().Get("order_id")
+	var order *CheckoutOrder
+	var err error
+	if orderId == "" {
+		order, err = s.CreateOrUpdateCheckout(r, checkoutId)
+		if err != nil {
+			logger.Error("unable to create klarna session", "error", err)
+			return err
+		}
+		// s.ApplyKlarnaPaymentStarted(r.Context(), order, checkoutId)
+
+	}
+	order, err = s.klarnaClient.GetOrder(r.Context(), orderId)
+	if err != nil {
+		return err
+	}
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	w.Header().Set("Permissions-Policy", "payment=(self \"https://js.stripe.com\" \"https://m.stripe.network\" \"https://js.playground.kustom.co\")")
+	w.WriteHeader(http.StatusOK)
+	_, err = fmt.Fprintf(w, tpl, order.HTMLSnippet)
+	return err
+
+}
+
+func (s *CheckoutPoolServer) KlarnaConfirmationHandler(w http.ResponseWriter, r *http.Request) {
+
+	orderId := r.PathValue("order_id")
+	order, err := s.klarnaClient.GetOrder(r.Context(), orderId)
+
+	if err != nil {
+		w.WriteHeader(http.StatusInternalServerError)
+		w.Write([]byte(err.Error()))
+		return
+	}
+
+	// Apply ConfirmationViewed mutation
+	cartId, ok := cart.ParseCartId(order.MerchantReference1)
+	if ok {
+		s.Apply(r.Context(), uint64(cartId), &messages.ConfirmationViewed{})
+	}
+
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	if order.Status == "checkout_complete" {
+		http.SetCookie(w, &http.Cookie{
+			Name:     "cartid",
+			Value:    "",
+			Path:     "/",
+			Secure:   true,
+			HttpOnly: true,
+			Expires:  time.Unix(0, 0),
+			SameSite: http.SameSiteLaxMode,
+		})
+	}
+
+	w.WriteHeader(http.StatusOK)
+	fmt.Fprintf(w, tpl, order.HTMLSnippet)
+
+}
+
+func (s *CheckoutPoolServer) KlarnaValidationHandler(w http.ResponseWriter, r *http.Request) {
+	log.Printf("Klarna order validation, method: %s", r.Method)
+	if r.Method != "POST" {
+		w.WriteHeader(http.StatusMethodNotAllowed)
+		return
+	}
+	order := &CheckoutOrder{}
+	err := json.NewDecoder(r.Body).Decode(order)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+	}
+	logger.InfoContext(r.Context(), "Klarna order validation received", "order_id", order.ID, "cart_id", order.MerchantReference1)
+	grain, err := s.getGrainFromKlarnaOrder(r.Context(), order)
+	if err != nil {
+		logger.ErrorContext(r.Context(), "Unable to get grain from klarna order", "error", err.Error())
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	s.reserveInventory(r.Context(), grain)
+
+	w.WriteHeader(http.StatusOK)
+
+}
+
+func (s *CheckoutPoolServer) KlarnaNotificationHandler(w http.ResponseWriter, r *http.Request) {
+
+	log.Printf("Klarna order notification, method: %s", r.Method)
+	logger.InfoContext(r.Context(), "Klarna order notification received", "method", r.Method)
+	if r.Method != "POST" {
+		w.WriteHeader(http.StatusMethodNotAllowed)
+		return
+	}
+	order := &CheckoutOrder{}
+	err := json.NewDecoder(r.Body).Decode(order)
+	if err != nil {
+		w.WriteHeader(http.StatusBadRequest)
+	}
+	log.Printf("Klarna order notification: %s", order.ID)
+	logger.InfoContext(r.Context(), "Klarna order notification received", "order_id", order.ID)
+
+	w.WriteHeader(http.StatusOK)
+
+}
+
+func (s *CheckoutPoolServer) KlarnaPushHandler(w http.ResponseWriter, r *http.Request) {
+	log.Printf("Klarna order confirmation push, method: %s", r.Method)
+	if r.Method != http.MethodPost {
+		w.WriteHeader(http.StatusMethodNotAllowed)
+		return
+	}
+	orderId := r.URL.Query().Get("order_id")
+	log.Printf("Order confirmation push: %s", orderId)
+
+	order, err := s.klarnaClient.GetOrder(r.Context(), orderId)
+
+	if err != nil {
+		log.Printf("Error creating request: %v\n", err)
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	grain, err := s.getGrainFromKlarnaOrder(r.Context(), order)
+	if err != nil {
+		logger.ErrorContext(r.Context(), "Unable to get grain from klarna order", "error", err.Error())
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	if s.inventoryService != nil {
+		inventoryRequests := getInventoryRequests(grain.CartState.Items)
+		err = s.inventoryService.ReserveInventory(r.Context(), inventoryRequests...)
+
+		if err != nil {
+			logger.WarnContext(r.Context(), "placeorder inventory reservation failed")
+			w.WriteHeader(http.StatusNotAcceptable)
+			return
+		}
+		s.Apply(r.Context(), uint64(grain.Id), &messages.InventoryReserved{
+			Id:     grain.Id.String(),
+			Status: "success",
+		})
+	}
+
+	// err = confirmOrder(r.Context(), order, orderHandler)
+	// if err != nil {
+	// 	log.Printf("Error confirming order: %v\n", err)
+	// 	w.WriteHeader(http.StatusInternalServerError)
+	// 	return
+	// }
+
+	// err = triggerOrderCompleted(r.Context(), a.server, order)
+	// if err != nil {
+	// 	log.Printf("Error processing cart message: %v\n", err)
+	// 	w.WriteHeader(http.StatusInternalServerError)
+	// 	return
+	// }
+	err = s.klarnaClient.AcknowledgeOrder(r.Context(), orderId)
+	if err != nil {
+		log.Printf("Error acknowledging order: %v\n", err)
+	}
+
+	w.WriteHeader(http.StatusOK)
+}
+
+var tpl = `<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <title>s10r testing - checkout</title>
+  </head>
+
+  <body>
+    %s
+  </body>
+</html>
+`
+
+func getLocationId(item *cart.CartItem) inventory.LocationID {
+	if item.StoreId == nil || *item.StoreId == "" {
+		return "se"
+	}
+	return inventory.LocationID(*item.StoreId)
+}
+
+func getInventoryRequests(items []*cart.CartItem) []inventory.ReserveRequest {
+	var requests []inventory.ReserveRequest
+	for _, item := range items {
+		if item == nil {
+			continue
+		}
+		requests = append(requests, inventory.ReserveRequest{
+			InventoryReference: &inventory.InventoryReference{
+				SKU:        inventory.SKU(item.Sku),
+				LocationID: getLocationId(item),
+			},
+			Quantity: uint32(item.Quantity),
+		})
+	}
+	return requests
+}
+
+func (a *CheckoutPoolServer) getGrainFromKlarnaOrder(ctx context.Context, order *CheckoutOrder) (*checkout.CheckoutGrain, error) {
+	cartId, ok := cart.ParseCartId(order.MerchantReference1)
+	if !ok {
+		return nil, fmt.Errorf("invalid cart id in order reference: %s", order.MerchantReference1)
+	}
+	grain, err := a.Get(ctx, uint64(cartId))
+	if err != nil {
+		return nil, fmt.Errorf("failed to get cart grain: %w", err)
+	}
+	return grain, nil
+}