before method

@override Future<Map<String, dynamic>?> before(HookContext context)

Before flag evaluation.

Returned context updates are merged into the evaluation context before the provider is called and before later before hooks execute.

Implementation

@override
Future<Map<String, dynamic>?> before(HookContext context) async {
  final startTime = DateTime.now();

  // Start span with OTel naming convention
  final attributes = <String, Object?>{
    'feature_flag.key': context.flagKey,
    'feature_flag.provider_name':
        context.providerMetadata?.name ?? 'IntelliToggle',
  };

  // Extract targetingKey from evaluation context map (required by OTel)
  final evalContext = context.evaluationContext;
  if (evalContext.containsKey('targetingKey')) {
    attributes['feature_flag.context.targetingKey'] =
        evalContext['targetingKey'];
  }

  final span = Telemetry.startSpan('feature_flag', attributes: attributes);
  context.hookData.set(_spanKey, span);
  context.hookData.set(_startTimeKey, startTime);

  // Increment total evaluation counter
  Telemetry.metrics.increment('feature_flag.evaluation_count');
  return null;
}