update inventory package

pkg/inventory/redis_service.go

@@ -42,20 +42,6 @@ func (s *RedisInventoryService) LoadLuaScript(key string) error {
 	return nil
 }
 
-func (s *RedisInventoryService) AddWarehouse(warehouse *Warehouse) error {
-	// Convert warehouse to Redis-friendly format
-	data := map[string]interface{}{
-		"id":        string(warehouse.ID),
-		"name":      warehouse.Name,
-		"inventory": warehouse.Inventory,
-	}
-
-	// Store in Redis with a key pattern like "warehouse:<ID>"
-	key := "warehouse:" + string(warehouse.ID)
-	_, err := s.client.HMSet(context.Background(), key, data).Result()
-	return err
-}
-
 func (s *RedisInventoryService) GetInventory(ctx context.Context, sku SKU, locationID LocationID) (int64, error) {
 
 	cmd := s.client.Get(ctx, getInventoryKey(sku, locationID))
@@ -75,12 +61,45 @@ func getInventoryKey(sku SKU, locationID LocationID) string {
 	return fmt.Sprintf("inventory:%s:%s", sku, locationID)
 }
 
+func (s *RedisInventoryService) GetInventoryBatch(ctx context.Context, refs ...*InventoryReference) ([]InventoryResult, error) {
+	results := make([]InventoryResult, len(refs))
+	pipe := s.client.Pipeline()
+	cmds := make([]*redis.StringCmd, len(refs))
+	for i, ref := range refs {
+		key := getInventoryKey(ref.Sku, ref.LocationID)
+		cmds[i] = pipe.Get(ctx, key)
+	}
+	_, err := pipe.Exec(ctx)
+	if err != nil && err != redis.Nil {
+		return nil, err
+	}
+
+	for i, cmd := range cmds {
+		quantity, err := cmd.Int64()
+		if err != nil && err != redis.Nil {
+			return nil, err
+		}
+		results[i] = InventoryResult{
+			InventoryReference: refs[i],
+			Quantity:           uint32(quantity),
+		}
+	}
+
+	return results, nil
+}
+
 func (s *RedisInventoryService) UpdateInventory(ctx context.Context, rdb redis.Pipeliner, sku SKU, locationID LocationID, quantity int64) error {
 	key := getInventoryKey(sku, locationID)
 	cmd := rdb.Set(ctx, key, quantity, 0)
 	return cmd.Err()
 }
 
+func (s *RedisInventoryService) DecrementInventory(ctx context.Context, rdb redis.Pipeliner, sku SKU, locationID LocationID, quantity int64) error {
+	key := getInventoryKey(sku, locationID)
+	cmd := rdb.DecrBy(ctx, key, quantity)
+	return cmd.Err()
+}
+
 func (s *RedisInventoryService) IncrementInventory(ctx context.Context, rdb redis.Pipeliner, sku SKU, locationID LocationID, quantity int64) error {
 	key := getInventoryKey(sku, locationID)
 	cmd := rdb.IncrBy(ctx, key, quantity)
@@ -120,7 +139,7 @@ func makeKeysAndArgs(req ...ReserveRequest) ([]string, []string) {
 		if r.Quantity <= 0 {
 			return nil, nil
 		}
-		keys[i] = getInventoryKey(r.SKU, r.LocationID)
+		keys[i] = getInventoryKey(r.Sku, r.LocationID)
 		args[i] = strconv.Itoa(int(r.Quantity))
 	}
 	return keys, args