buildFilterConnections function

Implementation

Future<bool> Function(HttpRequest request) buildFilterConnections({
  FutureOr<GameProperty> Function(HttpRequest request)? loadProperty,
  FutureOr<ServerThumbnail?> Function(HttpRequest request)? loadThumbnail,
}) => (request) async {
  final response = request.response;
  response.headers.add("Access-Control-Allow-Origin", "*");
  response.headers.add("Access-Control-Allow-Methods", "GET,OPTIONS");
  response.headers.add("Access-Control-Allow-Headers", "X-Setonix-Method");
  response.headers.add("Access-Control-Expose-Headers", "Content-Length");

  response.statusCode = HttpStatus.ok;
  if (request.method == 'OPTIONS') {
    response.close();
    return false;
  }
  String? sendMessage;
  try {
    final method = request.headers.value('X-Setonix-Method');
    if (method == kInfoMethod) {
      sendMessage =
          ((await loadProperty?.call(request)) ?? GameProperty.defaultProperty)
              .toJson();
    } else if (method == kThumbnailMethod) {
      final thumbnail = await loadThumbnail?.call(request);
      if (thumbnail == null) {
        response.statusCode = HttpStatus.notFound;
        response.close();
        return false;
      }
      if (!kAllowedThumbnailContentTypes.contains(thumbnail.contentType) ||
          thumbnail.bytes.length > kMaxThumbnailSize) {
        response.statusCode = HttpStatus.unsupportedMediaType;
        response.close();
        return false;
      }
      response.headers.contentType = ContentType.parse(thumbnail.contentType);
      response.headers.contentLength = thumbnail.bytes.length;
      response.add(thumbnail.bytes);
      response.close();
      return false;
    }
  } catch (_) {}
  if (sendMessage != null) {
    response.statusCode = HttpStatus.ok;
    response.write(sendMessage);
    response.close();
    return false;
  }
  return true;
};