Method readSettings

app/src/Licensing/LemonSqueezy.cpp:377–402

* @brief Loads and decrypts cached licensing data from QSettings; the offline * grace period is recomputed from the last check, with monotonicNow() flooring * the clock so rewinding the system time cannot extend it. */

 * the clock so rewinding the system time cannot extend it.
 */
void Licensing::LemonSqueezy::readSettings()
{
  m_settings.beginGroup("licensing");
  auto license = m_settings.value("license", "").toString();
  auto data    = m_settings.value("data", "").toString();
  auto dt      = m_settings.value("lastCheck", "").toString();
  m_settings.endGroup();

  if (data.isEmpty() || license.isEmpty())
    return;

  m_license          = m_simpleCrypt.decryptToString(license);
  auto decryptedData = m_simpleCrypt.decryptToByteArray(data);

  m_gracePeriod = 0;
  if (!dt.isEmpty()) {
    auto dateTime  = m_simpleCrypt.decryptToString(dt);
    auto currentDt = monotonicNow();
    auto lastCheck = QDateTime::fromString(dateTime, Qt::RFC2822Date);
    if (lastCheck.isValid() && lastCheck < currentDt)
      m_gracePeriod = qMax(0, 30 - lastCheck.daysTo(currentDt));
  }

  readValidationResponse(decryptedData, true);
  Q_EMIT licenseChanged();
}

/**
 * @brief Encrypts and writes the current license key and metadata to QSettings.