misc: small fix or general refactoring i did not bother commenting

modules/zerogod/zerogod_save.go

@@ -0,0 +1,35 @@
+package zerogod
+
+import (
+	"fmt"
+	"io/ioutil"
+
+	yaml "gopkg.in/yaml.v3"
+)
+
+func (mod *ZeroGod) save(address, filename string) error {
+	if address == "" {
+		return fmt.Errorf("address cannot be empty")
+	}
+	if filename == "" {
+		return fmt.Errorf("filename cannot be empty")
+	}
+
+	if ipServices, found := mod.mapping[address]; found {
+		data, err := yaml.Marshal(ipServices)
+		if err != nil {
+			return err
+		}
+
+		err = ioutil.WriteFile(filename, data, 0644)
+		if err != nil {
+			return err
+		}
+
+		mod.Info("mDNS information saved to %s", filename)
+	} else {
+		return fmt.Errorf("no mDNS information found for address %s", address)
+	}
+
+	return nil
+}