Method nowFloored

app/src/Licensing/MonotonicClock.cpp:33–53

* @brief Core flooring over an explicit settings store and cipher (for testing). */

 * @brief Core flooring over an explicit settings store and cipher (for testing).
 */
QDateTime Licensing::MonotonicClock::nowFloored(QSettings& settings, SimpleCrypt& crypt)
{
  auto effective = QDateTime::currentDateTime();

  settings.beginGroup("licensing");
  const auto stored = settings.value("lastSeen", "").toString();
  settings.endGroup();

  if (!stored.isEmpty()) {
    const auto seen = QDateTime::fromString(crypt.decryptToString(stored), Qt::RFC2822Date);
    if (seen.isValid() && seen > effective)
      effective = seen;
  }

  const auto encoded = crypt.encryptToString(effective.toString(Qt::RFC2822Date));
  settings.beginGroup("licensing");
  settings.setValue("lastSeen", encoded);
  settings.endGroup();

  return effective;
}

/**
 * @brief Returns now floored at the highest wall-clock ever observed (anti clock-rewind).