public static Optional createFromLog()

in src/main/java/com/googlesource/gerrit/plugins/auditsl4j/logsource/SSHLog.java [64:131]
64 lines of code
8 McCabe index (conditional complexity)

  public static Optional<SSHLog> createFromLog(String line) {
    Matcher authCommand =
        Pattern.compile(
                "^\\[(?<timestamp>.*?)\\]\\s(?<session>.*?)\\s"
                    + "(?<user>.*?)\\s(?<accountId>.*?)\\s(?<command>LOGOUT|LOGIN)(:?\\sFROM.*?)?$")
            .matcher(line);

    Matcher authFailure =
        Pattern.compile(
                "^\\[(?<timestamp>.*?)\\]\\s(?<session>.*?)\\s(?<user>.*?)\\s(?<command>AUTH FAILURE)(:?\\sFROM.*?)?$")
            .matcher(line);

    Matcher nonAuthCommand =
        Pattern.compile(
                "^\\[(?<timestamp>.*?)\\]\\s(?<session>.*?)\\s(?<user>.*?)\\s(?<accountId>.*?)\\s(?<command>.*?)(\\s(?<waitTime>\\d+ms)\\s(?<execTime>\\d+ms)\\s(?<result>.*?))?$")
            .matcher(line);

    if (authCommand.matches()) {
      try {
        return Optional.of(
            new SSHLog(
                authCommand.group("timestamp"),
                authCommand.group("session"),
                authCommand.group("user"),
                authCommand.group("accountId"),
                authCommand.group("command"),
                null,
                null,
                "0"));
      } catch (Exception e) {
        log.error("Auth command match, but something wrong while parsing line: " + line);
      }
    } else if (authFailure.matches()) {
      try {
        return Optional.of(
            new SSHLog(
                authFailure.group("timestamp"),
                authFailure.group("session"),
                authFailure.group("user"),
                null,
                authFailure.group("command"),
                null,
                null,
                "0"));
      } catch (Exception e) {
        log.error("Auth failure command match, but something wrong while parsing line: " + line);
      }

    } else if (nonAuthCommand.matches()) {
      try {
        return Optional.of(
            new SSHLog(
                nonAuthCommand.group("timestamp"),
                nonAuthCommand.group("session"),
                nonAuthCommand.group("user"),
                nonAuthCommand.group("accountId"),
                nonAuthCommand.group("command"),
                nonAuthCommand.group("waitTime"),
                nonAuthCommand.group("execTime"),
                nonAuthCommand.group("result") != null ? nonAuthCommand.group("result") : "0"));
      } catch (Exception e) {
        log.error("Non Auth command match, but something wrong while parsing line: " + line);
      }
    } else {
      log.error("Can't extract any info from line: " + line);
    }
    return Optional.empty();
  }