parent item mutations

2026-07-08 11:39:42 +02:00
parent e20793a6b3
commit 9f1eca07e9
14 changed files with 784 additions and 103 deletions
@@ -161,7 +161,19 @@ type CartGrain struct {
 	Items             []*CartItem `json:"items"`
 	TotalPrice        *Price      `json:"totalPrice"`
 	TotalDiscount     *Price      `json:"totalDiscount"`
-	Processing        bool        `json:"processing"`
+	// EvaluatedItems is the per-line promotion breakdown — see
+	// EvaluatedItem for shape and semantics. Populated by the canonical
+	// promotion pipeline (pkg/promotions.PromotionService.EvaluateAndApply)
+	// after every successful mutation, alongside TotalDiscount and
+	// AppliedPromotions, so any consumer of the grain (UCP cart response,
+	// legacy /cart HTTP handler, cart-mcp, AMQP mutation feed) sees the
+	// per-line discount/effective totals without re-running the engine at
+	// response time. Mirrors the same shape /promotions/evaluate-with-cart
+	// has returned since the breakdown feature was introduced; deliberately
+	// persisted via the event-log JSON block so we don't have to re-derive
+	// it on every read path (same precedent as TotalPrice/TotalDiscount).
+	EvaluatedItems []EvaluatedItem `json:"evaluatedItems,omitempty"`
+	Processing     bool            `json:"processing"`
 	//PaymentInProgress uint16      `json:"paymentInProgress"`
 	OrderReference string `json:"orderReference,omitempty"`