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>

pkg/checkout/mutation-context.go

@@ -0,0 +1,31 @@
+package checkout
+
+import (
+	"git.k6n.net/go-cart-actor/pkg/actor"
+)
+
+type CheckoutMutationContext struct {
+	// Add any services needed, e.g., for delivery calculations, but since inventory is pre-handled, maybe none
+}
+
+func NewCheckoutMutationContext() *CheckoutMutationContext {
+	return &CheckoutMutationContext{}
+}
+
+func NewCheckoutMutationRegistry(ctx *CheckoutMutationContext) actor.MutationRegistry {
+	reg := actor.NewMutationRegistry()
+	reg.RegisterMutations(
+		actor.NewMutation(HandleInitializeCheckout),
+		actor.NewMutation(HandlePaymentStarted),
+		actor.NewMutation(HandlePaymentCompleted),
+		actor.NewMutation(HandlePaymentDeclined),
+		actor.NewMutation(HandlePaymentEvent),
+		actor.NewMutation(HandleConfirmationViewed),
+		actor.NewMutation(HandleOrderCreated),
+		actor.NewMutation(HandleInventoryReserved),
+		actor.NewMutation(HandleSetDelivery),
+		actor.NewMutation(HandleSetPickupPoint),
+		actor.NewMutation(HandleRemoveDelivery),
+	)
+	return reg
+}