parse static method

UidlDocument parse(dynamic input)

Implementation

static UidlDocument parse(dynamic input) {
  Map<String, dynamic> map;

  if (input is String) {
    try {
      final decoded = jsonDecode(input);
      if (decoded is! Map<String, dynamic>) {
        throw UidlException(
          code: UidlErrorCodes.invalidDocument,
          message: 'UIDL document root must be a JSON object',
        );
      }
      map = decoded;
    } on FormatException catch (e) {
      throw UidlException(
        code: UidlErrorCodes.invalidDocument,
        message: 'Malformed JSON input: ${e.message}',
      );
    }
  } else if (input is Map<String, dynamic>) {
    map = input;
  } else if (input is Map) {
    map = Map<String, dynamic>.from(input);
  } else {
    throw UidlException(
      code: UidlErrorCodes.invalidDocument,
      message: 'Expected String or Map, got ${input.runtimeType}',
    );
  }

  if (!map.containsKey('version')) {
    throw UidlException(
      code: UidlErrorCodes.invalidDocument,
      message: 'Missing required "version" field in UIDL document',
    );
  }

  assertSupportedDocumentVersion(map['version']);

  if (!map.containsKey('root') || map['root'] is! Map) {
    throw UidlException(
      code: UidlErrorCodes.invalidDocument,
      message: 'Missing or invalid "root" node in UIDL document',
    );
  }

  try {
    return UidlDocument.fromJson(map);
  } catch (e) {
    throw UidlException(
      code: UidlErrorCodes.invalidDocument,
      message: 'Failed to construct UidlDocument: $e',
    );
  }
}