redo pubsub

pkg/cart/cart-grain.go

@@ -2,13 +2,10 @@ package cart
 
 import (
 	"encoding/json"
-	"log"
 	"slices"
-	"strings"
 	"sync"
 	"time"
 
-	"git.k6n.net/go-cart-actor/pkg/actor"
 	messages "git.k6n.net/go-cart-actor/pkg/messages"
 	"git.k6n.net/go-cart-actor/pkg/voucher"
 	"github.com/matst80/go-redis-inventory/pkg/inventory"
@@ -230,43 +227,12 @@ func (c *CartGrain) GetCurrentState() (*CartGrain, error) {
 	return c, nil
 }
 
-// Notify handles incoming events, e.g., inventory changes.
-func (c *CartGrain) Notify(event actor.Event) {
-	c.mu.Lock()
-	defer c.mu.Unlock()
-	// Example: if event is inventory change for a SKU in the cart
-	if strings.HasPrefix(event.Topic, "inventory:") {
-		sku := strings.TrimPrefix(event.Topic, "inventory:")
-
-		log.Printf("cart grain got inventory update: %s", event.Topic)
-		update, ok := event.Payload.(inventory.InventoryChange)
-		if !ok {
-			log.Printf("cart grain inventory update has invalid payload")
-			return
-		}
-		for _, item := range c.Items {
-
-			if item.Sku == sku && update.StockLocationID == *item.StoreId {
-				// Update stock status based on payload, e.g., if payload is bool available
-
-				log.Printf("cart grain got item stock update %d", update.Value)
-
-				item.Stock = uint16(update.Value)
-
-				break
-			}
-		}
-	}
-}
-
-func (c *CartGrain) UpdateSubscriptions(pubsub *actor.PubSub) {
-	pubsub.UnsubscribeAll(c.GetId())
-	skuSet := make(map[string]bool)
+func (c *CartGrain) HandleInventoryChange(change inventory.InventoryChange) {
 	for _, item := range c.Items {
-		skuSet[item.Sku] = true
-	}
-	for sku := range skuSet {
-		pubsub.Subscribe("inventory:"+sku, c.GetId())
+		if item.Sku == change.SKU && change.StockLocationID == *item.StoreId {
+			item.Stock = uint16(change.Value)
+			break
+		}
 	}
 }