send errors. also, check 'Filename' and 'filename'

1 files changed, 14 insertions, 6 deletions

diff --git a/findFilename.go b/findFilename.go
index d69b538..c99e289 100644
--- a/findFilename.go
+++ b/findFilename.go
@@ -1,6 +1,8 @@
 package config
 
 import (
+	"fmt"
+
 	"google.golang.org/protobuf/proto"
 	"google.golang.org/protobuf/reflect/protoreflect"
 )
@@ -8,8 +10,8 @@ import (
 // Gemini AI can help author some pretty good protobuf code.
 // I never remember the syntax for 'reflect' on these things.
 
-// returns "Filename" if it exists in the protobuf
-func GetFilename(pb proto.Message) (string, bool) {
+// this will try both "filename" and "Filename"
+func GetFilename(pb proto.Message) (string, error) {
 	// 1. Get the protoreflect.Message interface from the message.
 	// This is the entry point to the reflection API.
 	msg := pb.ProtoReflect()
@@ -19,18 +21,24 @@ func GetFilename(pb proto.Message) (string, bool) {
 
 	// 3. Find the specific field descriptor by its protobuf name ("Filename").
 	// Note: The field name must match the name in the .proto file.
-	fieldName := protoreflect.Name("Filename")
+	fieldName := protoreflect.Name("filename")
 	fieldDescriptor := descriptor.Fields().ByName(fieldName)
 
+	// try upper case
+	if fieldDescriptor == nil {
+		fieldName = protoreflect.Name("Filename")
+		fieldDescriptor = descriptor.Fields().ByName(fieldName)
+	}
+
 	// 4. Check if the field was found. If not, return false.
 	if fieldDescriptor == nil {
-		return "", false
+		return "", fmt.Errorf("fieldDescriptor == nil")
 	}
 
 	// 5. (Optional but recommended) Verify the field is a string type.
 	if fieldDescriptor.Kind() != protoreflect.StringKind {
 		// The field exists but is not a string, so we can't return it as one.
-		return "", false
+		return "", fmt.Errorf("The field exists but is not a string")
 	}
 
 	// 6. If the field exists and is a string, get its value.
@@ -38,7 +46,7 @@ func GetFilename(pb proto.Message) (string, bool) {
 	value := msg.Get(fieldDescriptor)
 
 	// 7. Convert the protoreflect.Value to a native Go string.
-	return value.String(), true
+	return value.String(), nil
 }
 
 // sets "Filename" if it exists in the protobuf