/**
* Reorder the Questions of a Step.
*
* @param Step $step
* @param array $order an ordered array of Question IDs
*
* @return array array of errors if something went wrong
*/
public function reorderQuestions(Step $step, array $order)
{
$reorderToo = [];
// List of Steps we need to reorder too (because we have transferred some Questions)
foreach ($order as $pos => $questionId) {
/** @var StepQuestion $stepQuestion */
$stepQuestion = $this->om->getRepository('UJMExoBundle:StepQuestion')->findByExerciseAndQuestion($step->getExercise(), $questionId);
if (!$stepQuestion) {
// Question is not linked to the Exercise, there is a problem with the order array
return ['message' => 'Can not reorder the Question. Unknown question found.'];
}
$oldStep = $stepQuestion->getStep();
if ($oldStep !== $step) {
// The question comes from another Step => destroy old link and create a new One
$oldStep->removeStepQuestion($stepQuestion);
$stepQuestion->setStep($step);
$reorderToo[] = $oldStep;
}
// Update order
$stepQuestion->setOrdre($pos);
$this->om->persist($stepQuestion);
}
if (!empty($reorderToo)) {
// In fact as the client call the server each time a Question is moved, there will be always one Step in this array
/** @var Step $stepToReorder */
foreach ($reorderToo as $stepToReorder) {
$stepQuestions = $stepToReorder->getStepQuestions();
/** @var StepQuestion $sqToReorder */
foreach ($stepQuestions as $pos => $sqToReorder) {
$sqToReorder->setOrdre($pos);
}
}
}
$this->om->flush();
return [];
}
