promotions

cmd/cart/main.go

@@ -149,8 +149,11 @@ func main() {
 			// any matched actions (e.g. the Volymrabatt volume discount), which adjust
 			// TotalPrice/TotalDiscount on top of line items and vouchers.
 			promotionCtx := promotions.NewContextFromCart(g, promotions.WithNow(time.Now()))
-			_, actions := promotionService.EvaluateAll(promotionStore.Snapshot(), promotionCtx)
-			promotions.ApplyActions(g, actions)
+			results, _ := promotionService.EvaluateAll(promotionStore.Snapshot(), promotionCtx)
+			// ApplyResults applies qualifying actions in priority order and records
+			// every effect — both applied discounts and pending "spend X more for ..."
+			// nudges with their progress — in g.AppliedPromotions.
+			promotionService.ApplyResults(g, results, promotionCtx)
 			g.Version++
 			return nil
 		}),
@@ -275,6 +278,11 @@ func main() {
 	mux.Handle("/mcp", promotionMCP.Handler())
 	mux.Handle("/mcp/", promotionMCP.Handler())
 
+	// Stateless promotion evaluation: POST a (possibly partial) eval context and
+	// get back the resulting totals plus the applied/pending effect breakdown,
+	// without creating or mutating a real cart.
+	mux.HandleFunc("POST /promotions/evaluate", newPromotionEvaluateHandler(promotionStore, promotionService))
+
 	// only for local
 	mux.HandleFunc("GET /add/remote/{host}", func(w http.ResponseWriter, r *http.Request) {
 		pool.AddRemote(r.PathValue("host"))