/**
* {@inheritdoc}
*/
public function display($scenarioAlias, $stepName, ParameterBag $queryParameters = null)
{
$process = $this->buildProcess($scenarioAlias);
$step = $process->getStepByName($stepName);
$this->context->initialize($process, $step);
try {
$this->context->rewindHistory();
} catch (NotFoundHttpException $e) {
//the step we are supposed to display was not found in the history.
if (null === $this->context->getPreviousStep()) {
//there is no previous step go to start
return $this->start($scenarioAlias, $queryParameters);
}
//we will go back to previous step...
$history = $this->context->getStepHistory();
if (empty($history)) {
//there is no history
return $this->start($scenarioAlias);
}
$step = $process->getStepByName(end($history));
$this->context->initialize($process, $step);
return $this->redirectToStepDisplayAction($process, $step);
}
if (!$this->context->isValid()) {
return $this->context->getProcess()->getValidator()->getResponse($step);
}
$result = $step->displayAction($this->context);
return $this->processStepResult($process, $result);
}
/**
* @param ProcessInterface $process
* @param string $scenarioAlias
*
* @return RedirectResponse
*/
protected function goToLastValidStep(ProcessInterface $process, $scenarioAlias)
{
//the step we are supposed to display was not found in the history.
if (null === $this->context->getPreviousStep()) {
//there is no previous step go to start
return $this->start($scenarioAlias);
}
//we will go back to previous step...
$history = $this->context->getStepHistory();
if (empty($history)) {
//there is no history
return $this->start($scenarioAlias);
}
$step = $process->getStepByName(end($history));
$this->context->initialize($process, $step);
return $this->redirectToStepDisplayAction($process, $step);
}
