diff --git a/rules/interface.go b/rules/interface.go
index f79885f..0ec904a 100644
--- a/rules/interface.go
+++ b/rules/interface.go
@@ -9,41 +9,53 @@ import (
 
 type HostnameRule interface {
 	Generate(params map[string]interface{}) (string, []byte, error)
-	Insert(category string, hostname string, paramsJSON []byte) error
-	Update(category string, oldhostname string, hostname string, paramsJSON []byte) error
+	Insert(category string, params map[string]interface{}) (string, error)
+	Update(category string, oldhostname string, params map[string]interface{}) (string, error)
 }
 
 type BaseRule struct{}
 
-func (br *BaseRule) baseInsert(category string, hostname string, paramsJSON []byte) error {
+func (br *BaseRule) baseInsert(rule HostnameRule, category string, params map[string]interface{}) (string, error) {
+	// Generate the hostname using the passed rule's Generate method
+	hostname, paramsJSON, err := rule.Generate(params)
+	if err != nil {
+		return "", err
+	}
+
 	exists, err := db.HostnameExists(category, hostname)
 	if err != nil {
-		return fmt.Errorf("error checking existence of hostname: %v", err.Error())
+		log.Printf("error checking existence of hostname: %v", err)
+		return "", err
 	}
 	if exists {
-		return fmt.Errorf("hostname %s does not exist in category %s", hostname, category)
+		log.Printf("hostname %s does not exist in category %s", hostname, category)
+		return "", fmt.Errorf("hostname-exists")
 	}
+
+	// Insert the hostname into the database
 	err = db.InsertHostname(category, hostname, paramsJSON)
 	if err != nil {
 		log.Printf("Error inserting hostname into DB: %v", err)
-		return err
-	}
-	return nil
-}
-
-func (br *BaseRule) baseUpdate(category string, oldhostname string, hostname string, paramsJSON []byte) error {
-	exists, err := db.HostnameExists(category, oldhostname)
-	if err != nil {
-		return fmt.Errorf("error checking existence of hostname: %v", err.Error())
-	}
-	if !exists {
-		return fmt.Errorf("hostname %s does not exist in category %s", oldhostname, category)
+		return "", err
 	}
 
-	err = db.UpdateHostname(category, oldhostname, hostname, paramsJSON)
-	if err != nil {
-		log.Printf("Error inserting hostname into DB: %v", err)
-		return err
-	}
-	return nil
+	return hostname, nil
+}
+
+// baseUpdate method for BaseRule
+func (br *BaseRule) baseUpdate(rule HostnameRule, category string, oldhostname string, params map[string]interface{}) (string, error) {
+	// Generate the new hostname using the passed rule's Generate method
+	newHostname, paramsJSON, err := rule.Generate(params)
+	if err != nil {
+		return "", err
+	}
+
+	// Update the hostname in the database
+	err = db.UpdateHostname(category, oldhostname, newHostname, paramsJSON)
+	if err != nil {
+		log.Printf("Error updating hostname in DB: %v", err)
+		return "", err
+	}
+
+	return newHostname, nil
 }