add giftcards

pkg/cart/mutation_add_giftcard.go

@@ -0,0 +1,41 @@
+package cart
+
+import (
+	"encoding/json"
+	"fmt"
+
+	messages "git.tornberg.me/go-cart-actor/pkg/messages"
+	"google.golang.org/protobuf/proto"
+)
+
+func AddGiftcard(grain *CartGrain, req *messages.AddGiftcard) error {
+	if req.Giftcard == nil {
+		return fmt.Errorf("giftcard cannot be nil")
+	}
+	if req.Giftcard.Value <= 0 {
+		return fmt.Errorf("giftcard value must be positive")
+	}
+	grain.lastGiftcardId++
+	designConfig := json.RawMessage{}
+	if req.Giftcard.DesignConfig != nil {
+		// Convert Any to RawMessage
+		data, err := proto.Marshal(req.Giftcard.DesignConfig)
+		if err != nil {
+			return fmt.Errorf("failed to marshal designConfig: %w", err)
+		}
+		designConfig = data
+	}
+	value := NewPriceFromIncVat(req.Giftcard.Value, 25) // Assuming 25% tax; adjust as needed
+	item := &GiftcardItem{
+		Id:            grain.lastGiftcardId,
+		Value:         *value,
+		DeliveryDate:  req.Giftcard.DeliveryDate,
+		Recipient:     req.Giftcard.Recipient,
+		RecipientType: req.Giftcard.RecipientType,
+		Message:       req.Giftcard.Message,
+		DesignConfig:  designConfig,
+	}
+	grain.Giftcards = append(grain.Giftcards, item)
+	grain.UpdateTotals()
+	return nil
+}