reworking this to make it more sane. hopefully.

1 files changed, 111 insertions, 0 deletions

diff --git a/autogenpbName.go b/autogenpbName.go
new file mode 100644
index 0000000..f2e492c
--- /dev/null
+++ b/autogenpbName.go
@@ -0,0 +1,111 @@
+package config
+
+import (
+	"fmt"
+
+	"google.golang.org/protobuf/proto"
+	"google.golang.org/protobuf/reflect/protoreflect"
+)
+
+// Because you followed autogenpb's advice (you did follow it right?) you now
+// win the automation lottery.
+//
+// for this .proto file, GetProtobufName(pb) returns "repos"
+// Then, ConfigLoad(), ConfigSave(), CacheLoad() and CacheSave()
+// all do exactly what is expected:
+//
+// Automatically work with the files:
+//
+//	~/.config/<appname>/repos.pb
+//
+// or
+//
+//	~/.cache/<appname/repos.pb
+//
+//	message Repos {
+//	        string                      uuid                     = 1;
+//	        string                      version                  = 2;
+//	        repeated Repo               repos                    = 3;
+func GetProtobufName(pb proto.Message) (string, error) {
+	// 1. Get the protoreflect.Message interface.
+	msg := pb.ProtoReflect()
+
+	// 2. Get the message's descriptor.
+	descriptor := msg.Descriptor()
+
+	// 3. Get all the field descriptors for the message.
+	fields := descriptor.Fields()
+
+	// find string "uuid"
+	fieldNumber := protoreflect.FieldNumber(1)
+	fieldDescriptor := fields.ByNumber(fieldNumber)
+
+	if fieldDescriptor == nil {
+		return "", fmt.Errorf("message %q has no field with number 1", descriptor.FullName())
+	}
+	if fieldDescriptor.Name() != "uuid" {
+		return "", fmt.Errorf("message %q field(1) != 'uuid' is (%s)", descriptor.FullName(), fieldDescriptor.Name())
+	}
+
+	// find string "version"
+	fieldNumber = protoreflect.FieldNumber(2)
+	fieldDescriptor = fields.ByNumber(fieldNumber)
+
+	if fieldDescriptor == nil {
+		return "", fmt.Errorf("message %q has no field(2)", descriptor.FullName())
+	}
+	if fieldDescriptor.Name() != "version" {
+		return "", fmt.Errorf("message %q field(2) != 'version' is (%s)", descriptor.FullName(), fieldDescriptor.Name())
+	}
+
+	// 4. Find the field descriptor specifically by its number (3).
+	// This is the crucial step.
+	fieldNumber = protoreflect.FieldNumber(3)
+	fieldDescriptor = fields.ByNumber(fieldNumber)
+
+	// 5. Add some safety checks.
+	if fieldDescriptor == nil {
+		return "", fmt.Errorf("message %q has no field with number 3", descriptor.FullName())
+	}
+
+	// Optional but recommended: verify it's a repeated field as you expect.
+	// IsList() is the reflection equivalent of `repeated`.
+	if !fieldDescriptor.IsList() {
+		return "", fmt.Errorf("field with number 3 (%q) is not a repeated field", fieldDescriptor.Name())
+	}
+
+	// 6. Get the name from the descriptor and return it.
+	// The name is of type protoreflect.Name, so we cast it to a string.
+	return string(fieldDescriptor.Name()), nil
+}
+
+func GetThirdFieldName(pb proto.Message) (string, error) {
+	// 1. Get the protoreflect.Message interface.
+	msg := pb.ProtoReflect()
+
+	// 2. Get the message's descriptor.
+	descriptor := msg.Descriptor()
+
+	// 3. Get all the field descriptors for the message.
+	fields := descriptor.Fields()
+
+	// 4. Find the field descriptor specifically by its number (3).
+	// This is the crucial step.
+	fieldNumber := protoreflect.FieldNumber(3)
+	fieldDescriptor := fields.ByNumber(fieldNumber)
+
+	// 5. Add some safety checks.
+	if fieldDescriptor == nil {
+		return "", fmt.Errorf("message %q has no field with number 3", descriptor.FullName())
+	}
+
+	// Optional but recommended: verify it's a repeated field as you expect.
+	// IsList() is the reflection equivalent of `repeated`.
+	if !fieldDescriptor.IsList() {
+		return "", fmt.Errorf("field with number 3 (%q) is not a repeated field", fieldDescriptor.Name())
+	}
+
+	// 6. Get the name from the descriptor and return it.
+	// The name is of type protoreflect.Name, so we cast it to a string.
+	return string(fieldDescriptor.Name()), nil
+}