public function convert(item $item, array $questions)
 {
     // Make sure we clean up the log
     LogService::flush();
     // Try to build the identifier using item `reference`
     // Otherwise, generate an alternative identifier and store the original reference as `label`
     $itemReference = $item->get_reference();
     $itemIdentifier = Format::isIdentifier($itemReference, false) ? $itemReference : 'ITEM_' . StringUtil::generateRandomString(12);
     if ($itemReference !== $itemIdentifier) {
         LogService::log("The item `reference` ({$itemReference}) is not a valid identifier, thus can not be used for `assessmentItem` identifier. " . "Replaced it with randomly generated `{$itemIdentifier}` and stored the original `reference` as `label` attribute");
     }
     $builder = new AssessmentItemBuilder();
     $assessmentItem = $builder->build($itemIdentifier, $itemReference, $questions, $item->get_content());
     $xml = new XmlDocument();
     $xml->setDocumentComponent($assessmentItem);
     // Flush out all the error messages stored in this static class, also ensure they are unique
     $messages = array_values(array_unique(LogService::flush()));
     return [$xml->saveToString(true), $messages];
 }
 public function getItem()
 {
     $item = new item($this->itemReference, array_keys($this->questions), $this->content);
     $item->set_status('published');
     return $item;
 }
 public function convert(item $item)
 {
     return $item->to_array();
 }