update

pkg/checkout/checkout-grain.go

@@ -73,6 +73,12 @@ func (p *Payment) IsSettled() bool {
 	}
 }
 
+type ContactDetails struct {
+	Email *string `json:"email,omitempty"`
+	Phone *string `json:"phone,omitempty"`
+	Name  *string `json:"name,omitempty"`
+}
+
 type ConfirmationStatus struct {
 	Code         *string   `json:"code,omitempty"`
 	ViewCount    int       `json:"viewCount"`
@@ -97,6 +103,7 @@ type CheckoutGrain struct {
 	InventoryReserved bool                `json:"inventoryReserved"`
 	Confirmation      *ConfirmationStatus `json:"confirmationViewed,omitempty"`
 	Payments          []*Payment          `json:"payments,omitempty"`
+	ContactDetails    *ContactDetails     `json:"contactDetails,omitempty"`
 }
 
 func NewCheckoutGrain(id uint64, cartId cart.CartId, cartVersion uint64, ts time.Time, cartState *cart.CartGrain) *CheckoutGrain {

pkg/checkout/mutation-context.go

@@ -26,6 +26,7 @@ func NewCheckoutMutationRegistry(ctx *CheckoutMutationContext) actor.MutationReg
 		actor.NewMutation(HandleSetDelivery),
 		actor.NewMutation(HandleSetPickupPoint),
 		actor.NewMutation(HandleRemoveDelivery),
+		actor.NewMutation(HandleContactDetailsUpdated),
 	)
 	return reg
 }

pkg/checkout/mutation_contact_details_updated.go

@@ -0,0 +1,30 @@
+package checkout
+
+import (
+	"fmt"
+
+	checkout_messages "git.k6n.net/go-cart-actor/proto/checkout"
+)
+
+// HandleContactDetailsUpdated mutation
+func HandleContactDetailsUpdated(g *CheckoutGrain, m *checkout_messages.ContactDetailsUpdated) error {
+	if m == nil {
+		return fmt.Errorf("HandleContactDetailsUpdated: nil payload")
+	}
+
+	if g.ContactDetails == nil {
+		g.ContactDetails = &ContactDetails{}
+	}
+
+	if m.Email != nil {
+		g.ContactDetails.Email = m.Email
+	}
+	if m.Phone != nil {
+		g.ContactDetails.Phone = m.Phone
+	}
+	if m.Name != nil {
+		g.ContactDetails.Name = m.Name
+	}
+
+	return nil
+}

pkg/checkout/mutation_contact_details_updated_test.go

@@ -0,0 +1,94 @@
+package checkout
+
+import (
+	"testing"
+
+	checkout_messages "git.k6n.net/go-cart-actor/proto/checkout"
+)
+
+func TestHandleContactDetailsUpdated(t *testing.T) {
+	tests := []struct {
+		name     string
+		initial  *ContactDetails
+		update   *checkout_messages.ContactDetailsUpdated
+		expected *ContactDetails
+	}{
+		{
+			name:    "update all fields",
+			initial: nil,
+			update: &checkout_messages.ContactDetailsUpdated{
+				Email: stringPtr("test@example.com"),
+				Phone: stringPtr("123456789"),
+				Name:  stringPtr("John Doe"),
+			},
+			expected: &ContactDetails{
+				Email: stringPtr("test@example.com"),
+				Phone: stringPtr("123456789"),
+				Name:  stringPtr("John Doe"),
+			},
+		},
+		{
+			name: "update partial fields",
+			initial: &ContactDetails{
+				Email: stringPtr("old@example.com"),
+				Phone: nil,
+				Name:  stringPtr("Old Name"),
+			},
+			update: &checkout_messages.ContactDetailsUpdated{
+				Phone: stringPtr("987654321"),
+			},
+			expected: &ContactDetails{
+				Email: stringPtr("old@example.com"),
+				Phone: stringPtr("987654321"),
+				Name:  stringPtr("Old Name"),
+			},
+		},
+		{
+			name:     "nil message",
+			initial:  nil,
+			update:   nil,
+			expected: &ContactDetails{}, // but error expected
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			grain := &CheckoutGrain{
+				ContactDetails: tt.initial,
+			}
+
+			err := HandleContactDetailsUpdated(grain, tt.update)
+
+			if tt.name == "nil message" {
+				if err == nil {
+					t.Errorf("expected error for nil message, got nil")
+				}
+				return
+			}
+
+			if err != nil {
+				t.Errorf("unexpected error: %v", err)
+			}
+
+			if grain.ContactDetails == nil && tt.expected != nil {
+				t.Errorf("expected contact details, got nil")
+			} else if grain.ContactDetails != nil && tt.expected == nil {
+				t.Errorf("expected nil contact details, got %v", grain.ContactDetails)
+			} else if grain.ContactDetails != nil && tt.expected != nil {
+				if (grain.ContactDetails.Email == nil && tt.expected.Email != nil) || (grain.ContactDetails.Email != nil && tt.expected.Email == nil) || (grain.ContactDetails.Email != nil && *grain.ContactDetails.Email != *tt.expected.Email) {
+					t.Errorf("email mismatch: got %v, expected %v", grain.ContactDetails.Email, tt.expected.Email)
+				}
+				if (grain.ContactDetails.Phone == nil && tt.expected.Phone != nil) || (grain.ContactDetails.Phone != nil && tt.expected.Phone == nil) || (grain.ContactDetails.Phone != nil && *grain.ContactDetails.Phone != *tt.expected.Phone) {
+					t.Errorf("phone mismatch: got %v, expected %v", grain.ContactDetails.Phone, tt.expected.Phone)
+				}
+				if (grain.ContactDetails.Name == nil && tt.expected.Name != nil) || (grain.ContactDetails.Name != nil && tt.expected.Name == nil) || (grain.ContactDetails.Name != nil && *grain.ContactDetails.Name != *tt.expected.Name) {
+					t.Errorf("name mismatch: got %v, expected %v", grain.ContactDetails.Name, tt.expected.Name)
+				}
+			}
+		})
+	}
+}
+
+func stringPtr(s string) *string {
+	return &s
+}