extract-log-field.go

func extractLogField(fd protoreflect.FieldDescriptor, hasPrefix bool) (string, bool) {
   // check if there are any options available for the field
   opts, ok := fd.Options().(*descriptorpb.FieldOptions)
   if !ok || opts == nil {
      return "", false
   }
   // check if protocol.FieldOptions specified for the field
   // basically extracting anything from [(protocol.options).logField = "something_here"]
   field, ok := proto.GetExtension(opts, protocol.E_Options).(*protocol.FieldOptions)
   if !ok || field == nil {
      return "", false
   }

   if field.LogField == "" && !hasPrefix {
      return "", false
   }

   return field.LogField, true
}