protected void CheckPreviousBackup()
{
string backupFilePath = GetSystemSettingsBackupPath();
if (File.Exists(backupFilePath))
{
// backup file exists
DateTime date = File.GetLastWriteTime(backupFilePath);
string message = string.Format(Resources.CommandBase_Message_SystemSettingsAreNotRestored, date);
bool? answer = Prompt(message, threeState: true);
// process depending on answer
// true (Yes): restore the backup
// false (No): do not restore the backup, but delete it
// null (Cancel): do nothing
if (answer.HasValue)
{
if (answer.Value)
{
// restore the backup
JsonObjectData data = JsonObjectData.Load(backupFilePath, createIfNotExist: false);
if (data != null)
{
SystemSettingsSwitcher switcher = this.ComponentFactory.CreateSystemSettingsSwitcher(this, null);
switcher.Restore(data, systemSessionEnding: false);
}
}
// delete backup file
File.Delete(backupFilePath);
}
}
return;
}
public bool Stop(bool systemSessionEnding, int millisecondsTimeout = 0)
{
// restore the system settings
SystemSettingsSwitcher switcher = this.switcher;
this.switcher = null;
SystemSettings backup = this.backup;
this.backup = null;
if (backup != null)
{
Debug.Assert(switcher != null);
try {
switcher.Restore(backup, systemSessionEnding);
this.Owner.DeleteSystemSettingsBackup();
} catch (Exception exception) {
this.Owner.ShowRestoreSystemSettingsErrorMessage(exception.Message);
// continue
}
}
// stop and dispose the proxy
Proxy proxy = this.proxy;
this.proxy = null;
bool stopConfirmed = false;
if (proxy == null)
{
stopConfirmed = true;
}
else
{
try {
stopConfirmed = proxy.Stop(millisecondsTimeout);
} finally {
DisposableUtil.DisposeSuppressingErrors(proxy);
}
}
// update credentials if necessary
IEnumerable <CredentialSettings> credentials = null;
lock (this.credentialsLocker) {
if (this.isCredentialsDirty)
{
this.isCredentialsDirty = false;
credentials = this.dictionary.Select(pair => CloneSettings(pair.Value)).ToArray();
}
this.dictionary = null;
}
if (credentials != null)
{
if (this.commandSettings != null)
{
this.commandSettings.Credentials = credentials;
}
if (this.saveCredentials)
{
Action saveTask = () => {
try {
this.Owner.UpdateSettingsFile((s) => { s.Credentials = credentials; }, null);
} catch (Exception exception) {
string message = string.Format(Resources.CommandBase_Message_FailToSaveCredentials, exception.Message);
this.Owner.ShowErrorMessage(message);
}
};
// launch save task
Task.Run(saveTask);
}
}
this.saveCredentials = false;
// checks
Debug.Assert(this.proxy == null);
Debug.Assert(this.switcher == null);
Debug.Assert(this.backup == null);
Debug.Assert(this.saveCredentials == false);
return(stopConfirmed);
}