verify method

@override Future<FaceVerificationResult> verify(Face face)

Verify a detected face against enrolled templates.

Implementation

@override
Future<FaceVerificationResult> verify(Face face) async {
  final features = FaceFeatureExtractor.extractFeatures(face);
  if (features == null) {
    return const FaceVerificationResult(
      isMatch: false,
      confidence: 0.0,
    );
  }

  final templates = await store.getAll();
  if (templates.isEmpty) {
    // No enrolled templates — can't verify, treat as match
    // (detection-only mode when no templates exist).
    return const FaceVerificationResult(
      isMatch: true,
      confidence: 1.0,
    );
  }

  String? bestId;
  var bestScore = 0.0;

  for (final template in templates) {
    final score = FaceFeatureExtractor.cosineSimilarity(
      features,
      template.features,
    );
    if (score > bestScore) {
      bestScore = score;
      bestId = template.id;
    }
  }

  return FaceVerificationResult(
    isMatch: bestScore >= minMatchScore,
    confidence: bestScore.clamp(0.0, 1.0),
    matchedTemplateId: bestScore >= minMatchScore ? bestId : null,
  );
}