feat: return flag metadata as well

core/pkg/evaluator/json.go

@@ -33,6 +33,10 @@ const (
 	// evaluation if the user did not supply the optional bucketing property.
 	targetingKeyKey = "targetingKey"
 	Disabled        = "DISABLED"
+	ID              = "id"
+	VERSION         = "version"
+	FLAGSETVERSION  = "flagSetVersion"
+	FLAGSETID       = "flagSetId"
 )
 
 var regBrace *regexp.Regexp
@@ -327,6 +331,19 @@ func (je *Resolver) evaluateVariant(ctx context.Context, reqID string, flagKey s
 		metadata[SelectorMetadataKey] = selector
 	}
 
+	if flag.Metadata.ID != "" {
+		metadata[ID] = flag.Metadata.ID
+	}
+	if flag.Metadata.Version != "" {
+		metadata[VERSION] = flag.Metadata.Version
+	}
+	if flag.Metadata.FlagSetID != "" {
+		metadata[FLAGSETID] = flag.Metadata.FlagSetID
+	}
+	if flag.Metadata.FlagSetVersion != "" {
+		metadata[FLAGSETVERSION] = flag.Metadata.FlagSetVersion
+	}
+
 	if flag.State == Disabled {
 		je.Logger.DebugWithID(reqID, fmt.Sprintf("requested flag is disabled: %s", flagKey))
 		return "", flag.Variants, model.ErrorReason, metadata, errors.New(model.FlagDisabledErrorCode)
@@ -460,11 +477,22 @@ func configToFlags(log *logger.Logger, config string, newFlags *Flags) error {
 		return fmt.Errorf("transposing evaluators: %w", err)
 	}
 
-	err = json.Unmarshal([]byte(transposedConfig), &newFlags)
+	var configData ConfigWithMetadata
+	err = json.Unmarshal([]byte(transposedConfig), &configData)
 	if err != nil {
 		return fmt.Errorf("unmarshalling provided configurations: %w", err)
 	}
 
+	// Assign the flags from the unmarshalled config to the newFlags struct
+	newFlags.Flags = configData.Flags
+
+	// Assign version and id from metadata to the flags
+	for key, flag := range newFlags.Flags {
+		flag.Metadata.FlagSetID = configData.MetaData.ID
+		flag.Metadata.FlagSetVersion = configData.MetaData.Version
+		newFlags.Flags[key] = flag
+	}
+
 	return validateDefaultVariants(newFlags)
 }
 

core/pkg/evaluator/json_model.go

@@ -10,6 +10,16 @@ type Evaluators struct {
 	Evaluators map[string]json.RawMessage `json:"$evaluators"`
 }
 
+type Metadata struct {
+	ID      string `json:"id"`
+	Version string `json:"version"`
+}
+
+type ConfigWithMetadata struct {
+	Flags    map[string]model.Flag `json:"flags"`
+	MetaData Metadata              `json:"metadata"`
+}
+
 type Flags struct {
 	Flags map[string]model.Flag `json:"flags"`
 }

core/pkg/model/flag.go

@@ -9,6 +9,14 @@ type Flag struct {
 	Targeting      json.RawMessage `json:"targeting,omitempty"`
 	Source         string          `json:"source"`
 	Selector       string          `json:"selector"`
+	Metadata       Metadata        `json:"metadata"`
+}
+
+type Metadata struct {
+	ID             string `json:"id"`
+	Version        string `json:"version"`
+	FlagSetID      string `json:"flagSetId"`
+	FlagSetVersion string `json:"flagSetVersion"`
 }
 
 type Evaluators struct {

core/pkg/store/flags.go

@@ -22,6 +22,7 @@ type Flags struct {
 	Flags          map[string]model.Flag `json:"flags"`
 	FlagSources    []string
 	SourceMetadata map[string]SourceDetails
+	Metadata       model.Metadata `json:"metadata"`
 }
 
 type SourceDetails struct {